133results about How to "Improve stress stability" patented technology

The invention discloses a shear of a backpack-type mulberry branch cutting machine. The shear of the backpack-type mulberry branch cutting machine solves the problem that an existing mulberry branch cutting machine is inconvenient to operate. According to the technical measure, the shear of the backpack-type mulberry branch cutting machine comprises a shear body, two blades of the shear body are hinged to the front end portion of a connecting rod through a pivot in a cross mode, the knife edge parts of the blades extend out towards the front end portion of the connecting rod, handles of the blades extend to the rear end portion of the connecting rod, and cutting edges of the knife edge parts of the two blades are opposite. The shear of the backpack-type mulberry branch cutting machine is characterized in that a sliding block is arranged on the connecting rod in a clearance mode; the sliding block and the handles of the two blades are movably connected through connection pieces; a reset spring used for enabling the shear to be opened is arranged between the sliding block and the connecting rod; an inhaul cable used for enabling the shear to be closed is connected with the sliding block; the inhaul cable extends within the width range of the connecting rod.

The invention discloses an integrated assembly type pipe gallery based on a composite bottom plate and a construction method thereof. Each unit plate block in the composite bottom plate of the integrated assembly type pipe gallery comprises a laminated portion and a cast-in-place portion which is located on the periphery of the laminated portion, wherein each laminated portion comprises a prefabricated bottom plate which is fixedly connected with a foundation cushion layer, a bottom plate truss and a bottom plate cast-in-place layer, and the peripheral edges of each bottom plate truss horizontally outwards extends to form a steel bar framework of the corresponding cast-in-place portion; a double-layer laminated wallboard comprises an outer prefabricated plate which is located on a water attaining face, an inner prefabricated plate which is located on a water opposite face and a cast-in-place sandwich layer which is located between the outer prefabricated plate and the inner prefabricated plate, the outer prefabricated plates and the inner prefabricated plates are connected through wall truss steel bars, and the bottoms of the wall truss steel bars are connected with the margins ofside edges of the steel bar frameworks of the cast-in-place portions of the composite bottom plate; and the lower end surface of the outer prefabricated plate is tightly attached to the upper surfaceof the foundation cushion layer, and a top plate cast-in-place layer of a laminated top plate and the cast-in-place sandwich layer of the double-layer laminated wallboard are integrally casted. According to the integrated assembly type pipe gallery and the construction method, the construction is convenient, fast and efficient, the construction cost is low, the waterproof effect is good, and the overall performance of the pipe gallery is high.

The invention relates to a piece of steel-structured equipment for construction, in particular to a detachable steel-structured jig frame for construction which comprises a main limb, slant limbs (2) and connectors (3). The main limb comprises a plurality of sectional profiled steel bars as upright supports (11) and horizontal supports (12). The connectors are arranged on the two ends of each upright support; the horizontal supports and the adjacent upright supports form a plurality of hexahedrons by the connectors. A plurality of slant limbs are arranged aslant and connected between the upright supports and the horizontal supports by the connectors; the upright supports between the two adjacent hexahedrons are connected by screw bolts. The invention has a reliable force-bearing structure and is convenient to install and transport. After use, the invention can be dissembled for reuse.

The invention discloses an outer plate stamping process. The outer plate stamping process comprises the following steps: S01: drawing: drawing a base material into a box-shaped component; S02: trimming and punching: adopting non-circumferential trimming, reserving a convex lug on a component, and punching a positioning hole in the convex lug; S03: laterally flanging and laterally trimming: putting a component processed and molded in the step S02 onto the convex mould, and selecting a cylindrical dowel pin for a lower mould base, carrying out left-right-end lateral flanging and front-end secondary trimming on the primary of the component after the positioning hole and the cylindrical dowel pin are inserted and positioned; and S04: laterally flanging and laterally trimming: carrying out front-end secondary lateral flanging after the cylindrical dowel pin penetrates through a cutter block of a low-mould trimming concave mould and is inserted and positioned with the positioning hole, and cutting off the convex lug. In this way, the stamping process increases the steps of reserving the convex plug and punching the positioning hole in the convex leg, so that component positioning in subsequent steps is guaranteed, and the positioning reliability is improved.

The invention provides a forward-reverse combined construction method for a foundation pit of non-permanent vertical support system, and belongs to the technical field of foundation pit support designand construction, and provides a construction method which has the advantages of a reverse construction method and a forward construction method at the same time. According to the method, a beam plate with a permanent structure is adopted as a horizontal support, and a temporary vertical support member is adopted to bear a vertical force during foundation pit construction. And earthwork is excavated according to the floor from top to bottom, a structural beam plate is poured, a permanent vertical member is poured from bottom to top after bottom plate construction is finished, and finally temporary steel upright posts are disassembled from top to bottom to finish earthwork excavation and structural construction of the whole basement. Namely, when the permanent structural beam plate is adopted to replace a support in the foundation pit, the temporary vertical support member is adopted to bear the vertical force during the construction of the foundation pit, and the excavation of the foundation pit and the construction of the basement structure of the whole basement are achieved through reasonable construction sequence and reliable node connection.

The invention relates to a circuit board and a drilling method of the circuit board. The circuit board is drilled to form the first hole, the hole diameter of the first hole is smaller than that of the target hole, and when the second hole is drilled, a part of material is cut by drilling the first hole, so that the chip removal requirement for drilling the second hole is reduced; meanwhile, as the drilling area of the first hole is located in the drilling area of the second hole, the hole wall of the first hole can be used for providing supporting and guiding effects for drilling of the second hole, and the breaking risk of the drill bit is reduced. Due to the fact that the hole depth of the first hole is smaller than that of the target hole, the chip removal requirement for drilling thefirst hole and the blade length requirement of the drill bit are lowered, and the problem that in the process of drilling the first hole, the drill bit is broken due to the large drilling depth or chip removal problem of the drill bit is effectively solved. According to the drilling method of the circuit board, especially in the machining process of the circuit board with the high thickness-diameter ratio, the target hole can be formed only through two drilling steps, the drilling steps are simplified, the drilling efficiency is improved, and the production efficiency of the circuit board is improved.

The invention relates to an integrated high-voltage electric box for a battery system. The integrated high-voltage electric box is used for installing a high-voltage electric component of the battery system therein, wherein the high-voltage electric component comprises a positive electric component, a negative electric component and a functional electric component; the electric box comprises an upper cover and an installation base; the upper cover is detachably connected to the installation base; the high-voltage electric component is arranged between the upper cover and the installation base; and one side surface, connected with the upper cover, of the installation base is provided with an installation part for installing the positive electric component, the negative electric component and the functional electric component and separating the positive electric component, the negative electric component and the functional electric component in an insulating manner. According to the electric box provided by the invention, the positive electric component, the negative electric component and the functional electric component in the high-voltage electric component of the battery system are integrated into an integral structure through the arranged installation part, so that the battery system is high in integration degree, high in space utilization ratio, small in installation space and flexible and convenient to maintain.

Provided is a thin film transistor comprising an oxide semiconductor thin film layer and has a threshold voltage that does not change much due to light, a bias stress or the like, thereby exhibiting excellent stress stability. A thin film transistor of the present invention is provided with: a gate electrode; an oxide semiconductor layer that is used as a channel layer; and a gate insulator film that is arranged between the gate electrode and the channel layer. The oxide semiconductor layer is configured of at least one metal element that is selected from the group consisting of In, Ga, Zn and Sn (excluding the cases where the oxide semiconductor layer is constituted of metal elements Sn, and at least one of In and Zn). The hydrogen concentration in the gate insulator film, which is in direct contact with the oxide semiconductor layer, is controlled to 4 atomic % or less.

The invention discloses a multi-point equal clamping device applied to the field of mechanical tools. The multi-point equal clamping device is characterized by structurally comprising a plurality of claw fingers and a claw finger drive device, wherein each claw finger comprises a clamping part, and the position, towards a clamped object, of each clamping part is uniformly equipped with a pluralityof hydraulic cylinders; each hydraulic cylinder comprises an oil cylinder piston and a pressure cavity; the pressure cavity on the same claw finger is in communication; and each oil cylinder piston comprises a clamping end which extends to the outside of the corresponding clamping part. The clamping ends of the hydraulic cylinders are utilized to perform clamping operation; pressure cavities of the hydraulic cylinders communicate with one another, so that the position of hydraulic oil also can be transferred according to different pressure, and therefore, the occurrence of a condition that acting force between the clamping ends and workpieces is too high is avoided. Circulating action of the hydraulic oil guarantees stress uniformity of the surface of the clamped object, so that a workpiece damage rate is effectively reduced, and the take-up effect of the clamped object is guaranteed. Meanwhile, weakening, caused by stress deformation, of clamping force can be eliminated during claw clamping by uniform stress, so that guarantee is provided for clamping force, on the clamped objects, of the claw fingers.

The invention discloses a short stress line rolling mill and a method for eliminating thread gaps thereof, belonging to the technical field of steel rolling systems in the metallurgical industry. The short stress line rolling mill of the present invention comprises a frame, a pull rod assembly, a roll train assembly, a guide beam assembly, and a roll gap adjustment device. A balance device for eliminating thread gaps is installed in the pull rod assembly, and the balance device includes a cage, a nut, A disc spring, a support member and a retaining sleeve. The two ends of the support member are respectively equipped with retaining sleeves and nuts. The disc spring is set on the surface of the supporting member and is limited by the retaining sleeve and the nut to form a balance assembly. The above-mentioned balance assembly is installed in the cage, and is installed in the tie rod assembly through the cage. The present invention installs a gap elimination balance device in the assembly of the pull rods of the rolling mill, and optimizes the structure of the balance device so that it can be installed in the form of components, thereby effectively improving the effect of eliminating thread gaps in the rolling mill, thereby ensuring that the rolling mill rolling precision.

The invention discloses a steel structure supporting system applied to a high-rise fabricated building, and belongs to the technical field of steel structure construction. The steel structure supporting system applied to the high-rise fabricated building can share the load transmitted from a cross beam through the force bearing characteristic of the ring surface of a stable ring, the load is evenly dispersed to the whole stable ring through a force transmitting net and ring-shaped reinforcing ribs, energy is consumed through an energy-consumption medium, with assistance of magnetic force circulation between magnetic reinforcing balls as aiding, on the one hand, the load transmitted to the magnetic reinforcing balls from the stable ring can be counteracted through magnetic force, and on theother hand, the damping effect of magnetic particles in the energy-consumption medium is enhanced; and a pressure bearing spring provides a further buffering energy consumption effect while supporting the stable ring, the force bearing stability of the whole supporting system is improved, meanwhile the load transmitted from the cross beam is subjected to guiding dispersing and buffering counteracting all the time, thus the pressure bearing capacity of the cross beam is remarkably improved, and a solid foundation is laid for development of the high-rise fabricated building.

The invention provides a novel high-strength anchorage device which comprises an anchorage cup, prestressed steel wires and a wire separation board. The novel high-strength anchorage device is characterized in that the wire separation board is arranged in the anchorage cup, and the prestressed steel wires penetrate through the anchorage cup and the wire separation board and are fixed to the end face of the wire separation board. The taper of a first taper hole of the anchorage cup is between 0.1 and 0.2, the taper of a second taper hole is between 0.2 and 0.3, the second taper hole adopts thetaper larger than that of the first taper hole, more stress of the wire separation board is converted into axial stress, axial force bearing is further facilitated, the stress stability of the anchorage device is improved, and deformation of the anchorage cup is reduced. The taper of the outer surface of a wire separation board body is identical to that of the large taper hole of the anchorage cup, the ratio of the radius of curvature of a groove to the radius of the wire separation board body is 1:1, the stress on the wire separation board is even, steel wire holes point at the peak of the first taper hole of the anchorage cup, and shearing damage of the wire separation board to the steel wires is reduced. The strength of the anchorage device is improved, the service life of the anchoragedevice is prolonged, practicability is high, popularization is easy, and economic benefits are good.

The invention relates to a lifting mechanism and belongs to the field of engineering equipment, in particular to a mining excavator lifting mechanism. The mining excavator lifting mechanism comprises a primary speed reduction drive mechanism, a secondary speed reduction drive mechanism and a motor, the non-load end of the motor is provided with a brake, and the load end is connected with the primary speed reduction drive mechanism through a coupling. Because the mining excavator lifting mechanism uses a single-motor single-winding drum structure and two hoisting ropes, the diameter of each hoisting rope is small, the diameter of the lifting winding drum is small, the drive ratio is reduced, the whole mechanism is simple in structure, light in weight, small in volume, less in drive piece number and small in processing and assembly workload, and the manufacturing cost is greatly lowered.

The invention discloses a prestressing-force communication tower structure and a construction method thereof. The tower structure comprises a foundation, a tower body and a communication tower antenna; the tower body comprises a lower portion reinforced segment, an upper portion non-reinforced segment, a top hoop, prestressing-force tendons, middle hoops and oblique supporting rods; the top of thereinforced segment is circularly clamped by the top hoop, a group of the prestressing-force tendons are arranged, and the prestressing-force tendons are distributed in the circumferential direction of the tower body at intervals, wherein the upper ends of the prestressing-force tendons are connected with the top hoop, and the lower ends of the prestressing-force tendons are connected with the foundation; a group of the middle hoops are arranged, and the reinforced segment is parallel and circularly clamped by the middle hoops in the vertical direction at intervals; the oblique supporting rodsare obliquely arranged between the middle hoops and the prestressing-force tendons, the lower ends of the oblique supporting rods are hinged to the middle hoops, the upper ends of the oblique supporting rods are hinged to the prestressing-force tendons. By means of the tower structure, the existing technical problems of poorer material stability and easy generation of component deformation, upward curling and cracking of a traditional prestressing-force communication tower are solved.

The invention relates to a construction method of a long-span steel truss suspension structure. The construction method comprises the following steps that supporting jig frames and steel rib frame columns are erected at set positions; steel rib frame beams and supporting columns are spliced layer by layer from bottom to top; multiple web rods are spliced at a top layer to form a steel truss structure; concrete wrapping the steel rib frame columns is poured layer by layer from bottom to top so as to form steel-reinforced concrete columns and concrete floors wrapping the steel rib frame beams, and later-poured areas are reserved at the ends of the concrete floors; after the concrete columns and the concrete floors to be located on the top layer solidify, the reserved later-poured areas are poured layer by layer from bottom to top, and connecting structures for connecting the corresponding concrete floors with the steel-reinforced concrete columns are formed in each layer. The top load ofa steel structure frame is completed borne by the supporting jig frames and the steel rib frame columns, and the structure has better stress stability. The connecting structures are constructed afterthe later-poured areas are utilized, the problem can be solved that beam-column nodes of the floors are likely to crack.

The invention discloses an installation device and method for an arc-second-level three-dimensional optical deformation measurement device and aims at conducting reliable installation on the arc-second level three-dimensional optical deformation measurement device. The installation device is formed by a transmitting module installation device and a receiving module installation device, the transmitting module installation device is composed of a transmitting main lens cone, a transmitting tail adjustment support, a light source installation support, a transmitting lens pressing ring, a transmitting lens fixing cover, a diaphragm installation plate and a light source installation plate, and the receiving module installation device is composed of a receiving main lens cone, a receiving lens pressing ring, a receiving lens fixing cover, a receiving tail adjustment support and a detector installation support. A sliding control and pressure fixing mode is adopted to install an adjustment portion of the three-dimensional optical deformation measurement device. By means of the installation device and method, the measurement device can be reliably installed, the installation device has the advantages of being adjustable in accuracy, convenient to adjust, stable and reliable after adjustment and the like, and the installation device has good stability under physical conditions of changed environment temperature, changed stress states and the like.

The invention discloses a pressing machine with stable pressure. The pressing machine comprises hydraulic cylinders and a base plate. Supporting pillars are welded to the two sides of the base plate.A cross beam is welded to the top ends of the two supporting pillars. The hydraulic cylinders are arranged at the top end of the cross beam, and piston rods are arranged at the bottoms of the hydraulic cylinders and are further fixedly connected with pressing plates through tripods. A pressing table is arranged on the upper surface of the base plate. According to the pressing machine with the stable pressure, in the first place, the piston rods are fixedly connected with the pressing plates through the tripods, stressing stability of the pressing plates is effectively improved due to arrangement of the tripods, and compared with a traditional pressing plate, the pressure is made more stable and uniform; in the second place, a pressure sensor is arranged inside the pressing table and can display the pressure borne by the pressing table onto a display screen through a console display, and therefore the pressure of each pressing plate can be known clearly by comparing the pressure with pressure set by users, and the pressure stability of the pressing machine is further improved; and moreover, the two pressing plates are arranged and can operate at the same time, and hence the workingefficiency is improved.

The invention discloses a stiff skeleton structure for bridge closure. The stiff skeleton structure comprises a skeleton body and a locking device, wherein the skeleton body is composed of a pluralityof supporting structures, each supporting structure consists of a first transverse rod, a second transverse rod, a first longitudinal rod, a second longitudinal rod, an inclined rod, a first main inclined support and a second main inclined support; the locking device is arranged on the skeleton body, the locking device is used for being fixedly connected with the end part of a bridge closure section. The stiff skeleton is good in stress stability and high in reliability.