117results about How to "Avoid a destructive situation" patented technology

The invention provides a user management device and a method in a virtual environment. The computer comprises a hardware platform, a virtual machine manager, a first operation unit, a second operation unit, a second operation system installed on the virtual machine manager and a virtual machine operation management unit, wherein the first operation unit comprises a management unit for setting a plurality of users and distributing corresponding resources and authorities for each of the plurality of users; and the virtual machine operation management unit is used for collecting the resources and the authorities corresponding to each of the plurality of users, transmitting a first user in the plurality of users, the resources and the authorities corresponding to the first user to the second operation system, acquiring read/write operation requests of the first user on resources corresponding to the first user according to the authorities corresponding to the first user, and returning corresponding read/write operation results to the second operation system through the virtual machine manager. The method avoids a condition that the first user uses resources of other users over the authority of the first user.

The invention relates to the technical field of an integrated circuit, in particular to a wiring structure of a printed circuit board. The wiring structure is applied to a dual-layer printed circuit board and comprises a plurality of first signal lines, a plurality of first ground lines, a plurality of second signal lines and a plurality of second ground lines, wherein each first signal line and each first ground line are arranged at a top layer in parallel and extend along a first direction, each second signal line and each second ground line are arranged at a bottom layer in parallel and extend along a second direction different from the first direction, the first signal lines and the first ground lines are arranged at the top layer at intervals according to a first preset mode, the second signal lines and the second ground lines are arranged at the bottom layer at intervals according to the second preset mode, and the first ground lines and the second ground lines are connected through via holes in the printed circuit board. By the wiring structure, the situation that a ground line environment is damaged caused by connection line crossing can be prevented, meanwhile, the impedance environment of the signal lines is ensured, and the performance of a circuit on the printed circuit board is ensured under the condition that the cost is not increased.

The invention discloses an epoxy based silicon tackifier and organosilicon conductive insulating gel prepared from the same. The tackifier is formed by hydrolytic condensation of vinyl siloxane and expoxy-based siloxane under the acidic condition, and the organosilicon conductive insulating gel is obtained by mixing the tackifier with vinyl silicone oil, a catalyst, hydrogen contained silicon oil and a thermal conductive filler and subjecting the mixture to stirring, vacuum defoaming, warming and curing. Epoxy groups are introduced to a hydrogen silicon oil contained side chain through hydrosilylation, the problem about poor compatibility of the former tackifier and matrix resin is solved, shortcomings that a traditional epoxy resin based material is poor in thermal resistance and prone to yellowing and aging are overcome by applying the tackifier to preparation of the organosilicon conductive insulating gel, and the prepared organosilicon conductive insulating gel has the advantages of good thermal resistance, high mechanical strength and good adhesiveness.

The invention discloses a new ball-type single-shear experimental device for anchor rods and anchor cables, and the device comprises upper and lower shear devices, left and right fixed cylinders, front and rear fixed guide grooves, and samples, wherein the shear devices comprise a loading flat plate, a fixed support plate, a vertical guide rail plate and a hollow shear ball table; the fixed cylinders comprise a long hollow cylinder and a hollow ball table coupled with one side of the hollow shear ball table; the fixed guide grooves comprise a concave steel block with three bolt holes; the samples comprise a left and right symmetric long cylinder, a middle spherical protrusion, and anchor rods or anchor cables built in the centers of the long cylinder and the middle spherical protrusion. The new ball-type single-shear experimental device has a simple structure, is easy to operate and convenient to control variables by loading through a common uniaxial compression tester, can achieve theshearing at any space angle with the shearing surface, overcomes the defect that the traditional single-shear experiment for anchor rods cannot change the installation angle, and increases the sheararea at the same time, thereby not only adapting to the conditions of large shear displacement, but also considering the impact of the shear surface on shear engineering.

The invention discloses a surface spraying device capable of drying in time. The device comprises a box body, first revolving door grooves with outward openings are symmetrically formed in a top walland a bottom wall of the box body up and down; a surface spraying cavity is formed in a bottom wall of the first revolving door groove in an upper side; a surface spraying mechanism is arranged in thesurface spraying cavity; a drying cavity is formed in a top wall of the first revolving door groove in a lower side; a drying mechanism is arranged in the drying cavity; a second revolving door groove is formed between a bottom wall of the surface spraying cavity and a top wall of the drying cavity; a second sliding groove with a leftward opening is formed in right sides of the surface spraying cavity, the second revolving door groove and the drying cavity; a first sliding groove is formed in a right end wall of the second sliding groove; conveying mechanisms are arranged in the first slidinggroove and the second sliding groove, an air inflation mechanism located on a rear side of the first revolving door groove in the upper side is arranged in the box body, workpieces with sprayed surfaces can be conveyed and dried in time, the situation that the sprayed surfaces are possibly damaged in the conveying process is avoided, and the surface spraying quality is improved.

The invention provides a file system FAT (file allocation table) partition table management method based on NOR FLASH, which is characterized in that a region in NOR FLASH is allocated and is used as an FAT partition table management region, the region is further divided into two parts, i.e. an FAT partition table index region and an FAT partition table region, wherein the FAT partition table region can be used for storing a plurality of FAT partition tables, firstly the region in the NOR FLASH is allocated and is used as the FAT partition table management region, the FAT partition table management region comprises the FAT partition table index region and a plurality of FAT partition tables, a current valid FAT partition table is obtained according to an index number in the FAT partition table index region, the FAT partition table next to the current valid FAT partition table is only required to be erased when the FAT partition table is required to be modified for file operation, and index numbers in the FAT partition table index region are cyclically increased.

The invention relates to the technical field of peanut harvesting mechanical equipment, in particular to a low-dust ensiling peanut combine harvester. The low-dust ensiling peanut combine harvester comprises a chassis; an engine is mounted at the rear end of the chassis; a cab is fixed to the upper portion of the front end of the chassis; a seedling cutting ensiling device is arranged at the foremost end of the chassis; an excavating and conveying device is arranged at the lower middle part of the chassis; a fruit picking and cleaning device is arranged at the upper middle part of the chassis;the fruit picking and cleaning device is provided with a fruit collecting box; and a first conveying channel and a second conveying channel are vertically fixed to the inner back end and the inner front end of the chassis. The harvester is reasonable in design and simple to operate; under the mutual cooperation of a fan and an ensiling box, flying dust can be greatly reduced and the situation that the atmospheric environment is damaged by the flying dust is avoided; a series of functions of seedling cutting and collecting, digging and soil loosening, conveying and soil removing, fruit picking, tail removing, cleaning and the like of peanuts can be achieved; and a fruit picking roller can perform fruit picking on different peanut varieties by replacing fruit picking teeth, so that the application range is wide.

The invention discloses a traffic height limit detection device. Two vertical plates, a winding cavity is formed in the vertical plate on the left side; a transmission mechanism is arranged in the winding cavity; the transmission mechanism comprises a transmission shaft rotationally arranged on the left end wall of the winding cavity; a reel is fixedly arranged on the transmission shaft; a vertical groove is formed in the vertical plate; a warning mechanism is arranged in the vertical groove; the movable block can move up and down in the vertical groove; a connecting rod is fixedly arranged onthe front end surface of the moving block; the connecting rod is fixedly arranged on the rear end face of the carrying block. The device is used as a height limiting rod; whether the height of the vehicle exceeds the standard or not can be quickly detected; meanwhile, the situation that the height limiting rod is damaged due to the fact that the height of the vehicle is slightly different from that of the height limiting rod can be effectively avoided, if the height of the vehicle exceeds the standard, the transverse shaft can automatically move upwards to be prevented from being damaged, thewarning strip is unfolded, and the round shell gives an alarm to remind a vehicle driver and the vehicle of exceeding the limit height.

A locking valve comprises a valve body, an opening and closing member arranged in the valve body and a valve stem connected with the opening and closing member. A middle hole is formed in the valve body, one end of the valve stem penetrates out of the middle hole and is connected with a valve switch, the valve body is covered with a protective cover, an opening is formed in one side of the protective cover, and the valve switch, the middle hole and the valve stem penetrating out of the middle hole are all located in the protective cover. A U-shaped opening is formed in the bottom of the protective cover. Symmetrical sliding ways are arranged on the two sides of the U-shaped opening. A mounting step is arranged on the opening. The mounting step is covered with a cover plate. The opening is covered and closed with the cover plate. A sliding seat matched with the sliding ways is arranged at the bottom of the cover plate. By the adoption of the locking valve, when the valve switch is locked, a lock cylinder and a lock hole can be hidden, damage to the lock cylinder and the lock hole by strangers is avoided, extrusion and damage to the valve switch is avoided in the valve switch locking process, and the service life of the valve is guaranteed.

The invention discloses an automatic fermentation tank for tea processing and production. According to a technical scheme in the invention, the automatic fermentation tank comprises a frame, a tank body and an agitating rod rotatably arranged in the tank body, wherein a motor is arranged on the outer side of the closed end of the tank body; the rotating shaft of the motor is connected with the rotating shaft of the agitating rod in the tank body in a linkage manner; a humidifier is arranged on the tank body; the outlet of the humidifier is communicated with a humidifying hole; an oxygen-rich membrane oxygen generator is arranged on the tank body; the gas outlet of the oxygen-rich membrane oxygen generator is communicated with a vent hole; an air suction machine is arranged on the tank body; the air suction port of the air suction machine is communicated with an air exchanging hole; a detection sensor is arranged in the tank body; a controller is arranged on the frame; the output end ofthe detection sensor is connected with the input end of the controller; and the output end of the controller is separately connected with the control ends of the humidifier, the oxygen-rich membraneoxygen generator and the air suction machine. The automatic fermentation tank for tea processing and production in the invention can automatically carry out tea fermentation and improves production efficiency and product quality.

The invention discloses a feeding mechanism used for welding of plates of an engineering machine, and relates to the technical field of engineering machines. The feeding mechanism comprises an operation table, plate bodies, a storage and taking device, a pushing device and a transfer device. The bottom of the storage and taking device and the upper surface of the operation table are fixedly mounted. The plate bodies are located in the storage and taking device. The pushing device and the upper surface of the operation table are fixedly mounted. Through the arrangement of the pushing device andthe transfer device, the pushing device can drive the plate bodies to shift from the storage and taking device to be finally in contact with the transfer device, the plates pushed from the pushing device can be transferred through the transfer device, and therefore the plate bodies are stably transferred to the place waiting for machining, and subsequent welding treatment is facilitated; and in the whole process, manual carrying is not needed any more, the situation that the plates are damaged is avoided, and the advantages that stability of plate feeding is improved and meanwhile feeding efficiency is improved are achieved.

The invention, which belongs to the technical field of soft package battery testing, discloses a single soft package battery testing device and method. The testing device comprises a left sliding block and a right sliding block which are connected in a sliding manner, four upper pressing blocks with the same structures, charging and discharging testing connecting wires and an insulating anti-bulging clamp. Four upper pressing blocks are connected to the left sliding block or the right sliding block in a sliding mode through respective brackets, thereby realizing size adjustment of the testingdevice in an X direction and a Y direction. One end of each charging and discharging testing connecting wire is fixed at the position facing the corresponding upper pressing block on each rack and theother ends of the charging and discharging testing connecting wires are connected with testing equipment. The insulating anti-bulging clamp is arranged on the left sliding block and the right slidingblock; and a K-type thermocouple is adhered to the central point of the insulating anti-bulging clamp. On the basis of an integrated design, the steps of the testing method are simplified, the damagecaused by tab punching is avoided; and the compatibility with testing of soft package batteries with different sizes and tab arrangement modes is realized.

The invention discloses a cable splice box suitable for communication engineering, which comprises a lower box body, a rotating shaft, an upper box body, a clip head, a slot, a connection port, a sub-connection port, a cable, a hoop, an anti-skid pad, a first Primary tension spring, fixing frame, connecting shaft, snap ring, fixing card, fixing groove, connecting nut, sleeve, hanging ring, fixing rod, hook, second tension spring, throat hoop, waterproof tape, conductive foam and Cable barrel shielding. The invention uses the fixing rod, the hoop, the first pull-back spring and the second pull-back spring to play a good buffering role when the cable is pulled by it, and solves the problem that the cable joint is easy to loosen under other pulls of the hand ; and through the sealing between the lower box body and the upper box body and the function of waterproof tape, the cable joint can be prevented from being affected by moisture; at the same time, the external interference signal can be blocked in time through the conductive foam and the shielding layer of the cable barrel, which is the cable line. normal communication guarantee.

The invention discloses a full-web type steel box transfer beam and a connecting structure of the full-web type steel box transfer beam and a reinforced concrete shear wall. The full-web type steel box transfer beam comprises a steel box beam and concrete, wherein the steel box beam is provided with a pipe-shaped main body formed by connecting a top plate, a bottom plate and two web plates; each span, corresponding to the transfer beam, of the top plate is provided with a group of local open openings; each concrete casting opening in each group of local open openings is formed in the middle position of the span corresponding to the transfer beam; and each group of local open openings is provided with at least one exhaust hole in two hogging moment region ranges of the span corresponding to the transfer beam. The transfer beam has the advantages that on the premise that the normal cross-section bending-resistant performance, the torsion-resistant performance, the vertical shearing-resistant performance and the local stability are not lowered through being compared with those of a closed steel box-concrete composite beam without local open openings in the prior art, great convenience is brought for the concrete casting in the construction process; the concrete casting efficiency is improved; and the transfer beam is applicable to cantilever transfer and large-span transfer.

The invention provides a bipolar lead-acid storage battery, belongs to the technical field of storage batteries and solves the problems that existing storage batteries have short service life and areproduced unsuccessfully. The bipolar lead-acid storage battery comprises a casing with a battery cavity inside and multiple cells arranged in the battery cavity, each cell comprises an inner cavity allowing injection of an electrolyte, the inner cavities of the cells are independent of one another, multiple air distributing chambers communicated with the inner cavities of the cells in a one-to-onecorrespondence are arranged in the casing and located above the battery cavity, a co-pressure cavity is also formed in the casing, and all the air distributing chambers are communicated with the co-pressure cavity through vent holes. The bipolar lead-acid storage battery has the advantages that the bipolar lead-acid storage battery can be produced successfully and used normally.

The invention relates to the technical field of drilling in geological engineering, in particular to a drilling rod with an axial deep groove wear-resistant joint for well drilling. The drilling rod comprises a rod body, a male connector and a female connector are arranged at two ends of the rod body, and a plurality of connector unscrewing clamping grooves extending along the axial direction of the male connector and the female connector are distributed on the male connector and the female connector in the circumferential direction. A connector anti-abrasion flange is formed between every twoadjacent connector screwing and unscrewing clamping grooves and provided with wear-resistant materials or a plurality of convex spherical crown installation blind holes, the smooth wear-resistant convex spherical crowns are fixedly connected into the convex spherical crown installation blind holes, and the rod body, the male connector and the female connector are each of a through hollow structure. The drill rod can be continuously screwed or unscrewed without applying radial pressure in the tripping and drill rod screwing and unscrewing processes, no damage is caused to the surface of the connector, abrasion of the connector is only generated in a well and the wall of the well, and therefore the overall service life of the drill rod is prolonged, the probability of accidents such as drilling tools and jamming of the drill rod is reduced, and the safety of the drill rod is improved. Therefore, the working efficiency of drilling is improved and the drilling cost is saved.

The invention relates to a seawater corrosion-resistant steel bar HRB400cE controlled rolling and controlled cooling process. The process comprises the following steps of determining the maximum pressure of a roller on a steel billet, the distance between roller groups and the rotating speed of a conveying roller; heating the steel billet to a preset temperature, and then conveying the steel billet to a steel rolling unit for rough rolling, intermediate rolling and finish rolling in sequence; ensuring that the conveying roller conveys the sheared finish-rolled steel billet to a cooling unit for cooling; bundling and loading finished steel into a finished product warehouse after being subjected to quality inspection and cutting. According to the process, an alloy type is input in advance, the maximum rolling pressure is set by a central control unit so that the situation that the steel billet is damaged by the roller can be effectively avoided, the central control unit can also adjust the distance between steel roller groups in a targeted mode according to the deformation quantity of the steel billet in the rolling process of a single step, and rolling parameters, heating parametersand cooling parameters can be adjusted in a targeted mode according to different kinds of steel billets by adjusting the heating temperature, the heat supplementing temperature and the conveying speed of the steel billet. The steel billet rolling efficiency of the process is effectively improved.