124results about How to "Guaranteed limit" patented technology

The invention relates to a high-temperature resistant vibration tool for a horizontal well. The high-temperature resistant vibration tool for the horizontal well comprises a shell assembly and a vibration assembly arranged in the shell assembly and is characterized in that the shell assembly comprises an upper joint, an upper joint sleeve, a connection sleeve, a cover and a lower joint which sleeve from top to bottom in sequence; the vibration assembly comprises an upper end turbine, an eccentric shaft and a lower end turbine which are connected in sequence from top to bottom; the vibration assembly is arranged in the shell assembly by an upper end bearing and a lower end bearing; the upper end bearing and the lower end bearing respectively sleeve two end shafts of the eccentric shaft; an upper thrust ring and a lower thrust ring are respectively arranged at two ends of the vibration assembly and are respectively arranged in the upper joint sleeve and the lower joint; a channel for allowing fluid to flow is arranged in each of the shell assembly and the vibration assembly. The high-temperature resistant vibration tool for the horizontal well has the beneficial effects that the work reliability and high temperature resistance of the tool are improved, the deepening depth is increased, and enough drilling and pressing effects are applied.

The invention discloses a shortest path attitude maneuver control method for a satellite around a space axis. The method comprises the following steps: describing the current attitude and target attitude of the satellite by a quaternion respectively; calculating a deviation quaternion according to the current attitude quaternion and target attitude quaternion of the satellite, and configuring the deviation quaternion into attitude information for control; calculating the angular velocity of the satellite relative to the orbital coordinate system according to the gyro measured angular velocity and the current attitude quaternion of the satellite, and configuring the angular velocity as angular velocity information for control; and calculating the instruction speed of a flywheel according to the attitude information for control and the angular velocity information for control to finish attitude maneuver control. According to the method, based on the around-space axis shortest path attitude maneuver control thought and by adopting quaternion to describe the target attitude reference and simplifying the attitude for control, a flywheel attitude maneuver control algorithm is designed; and the method is suitable for the conversion of sun-oriented attitude maneuver into earth-oriented attitude maneuver, the attitude maneuver around any space axis and the like.

The invention discloses an auxiliary turning device for bed-ridden examination of people. The device comprises a bottom plate, an auxiliary lifting structure, a supine turning structure, auxiliary turning structures and an auxiliary side turning structure, the bottom plate is a stainless steel bottom plate, the auxiliary lifting structure is arranged at the upper end of the bottom plate, a bed plate is arranged at the upper end of the auxiliary lifting structure, the supine turning structure is arranged on the right side of the upper end of the bed plate, grooves are formed in the middle of the upper end of the supine turning structure and the left side of the upper end of the bed plate, and the auxiliary turning structures are symmetrically arranged on the left and right sides of the upper end of the supine turning structure. The auxiliary turning device for bed-ridden examination of people is simple in structure, convenient to move, firm in fixation and easy to operate, can provide assistance for supine turning over and side turning over in the examination process and optimally exert force to get up according to the hand length condition, meets the use requirements, can help doctors to more comprehensively examine bedridden patients, is reasonable in structural design, and gives full comfort consideration to the patients.

The invention discloses an electronic product screen protecting device, and relates to the technical field of electronic product equipment. The electronic product screen protecting device comprises acooperation clamping structure and an extrusion limiting structure. A rotary lifting structure is arranged, clamping plates on the two sides can achieve clamping and fixing on various sizes of screensthrough the effect of a contraction spring under cooperation of sponge mats, therefore, the screen clamping and positioning requirements of various electronic products are met, and the stability of the screens is guaranteed; the extrusion limiting structure is arranged, pistons can be pushed to push gas in gas cylinders into a gas bag, the gas bag extrudes an electronic screen after being expanded, electronic screen limiting is achieved under cooperation of limiting convex points, sliding of the electronic screen is avoided, and when the electronic screen is impacted, gas in the middle of thegas bag expands towards the two sides to buffer the impact force; and under the cooperation effect of the cooperation clamping structure and the extrusion limiting structure, the electronic screen can be better protected, and the integrity of the electronic screen is guaranteed.

The invention discloses a multi-channel automatic quantitative sterile sampling device and a bioreactor with the same. The multi-channel automatic quantitative sterile sampling device comprises a plurality of sampling pipes, first peristaltic pumps, second peristaltic pumps, first heating and cooling units, a main gas pipe and a first pinch valve, wherein the sampling ends of the sampling pipes are positioned inside different bioreactors, and the other ends of the sampling pipes are sample outlets; one first peristaltic pump is arranged on each sampling pipe, and all first peristaltic pumps are positioned between the bioreactors and the sample outlets; one second peristaltic pump is arranged on each sampling pipe, and all second peristaltic pumps are positioned between the first peristaltic pumps and the sample outlets; one first heating and cooling unit is arranged on each sampling pipe, and all first heating and cooling units are positioned between the second peristaltic pumps and the sample outlets; one end of the main gas pipe is connected with an air filter, and a plurality of branched gas pipes are arranged at the other end of the main gas pipe; each branched gas pipe is communicated with one sampling pipe, and all conjunctions are positioned between the first peristaltic pumps and the second peristaltic pump; the first pinch valve is arranged on the main gas pipe, and ispositioned between the air filter and the branched gas pipes.

The invention discloses a leisure runner which comprises brackets, seats, handrails, a clamping spoke, a spring supporting block, a spring, turntables, bent pipes, seat supporting pieces, rotating shafts and outer rings and is characterized in that the rotating shafts are fixedly connected to the upper ends of two same brackets which stand oppositely and are connected with the turntables through rotating pairs; the two outer rings which stand oppositely are fixedly connected to the turntables through the clamping spoke; a plurality of bent pipes are fixed between the two outer rings; the seats are fixed between the two outer rings; the bottoms of the seats are fixed on the lower bent pipes through the seat supporting pieces; the handrails are arranged above two sides of the seats; the spring is connected to the brackets through the spring supporting block. The invention aims to provide novel creative leisure equipment in a park or other leisure places to provide a new creative option in the leisure place. The invention provides a novel leisure way to general leisure people.

The invention discloses a protective device after circumcision. The device includes a cylindrical hose and annular airbags distributed in the axial direction of the cylindrical hose, the middle part of the cylindrical hose forms a channel for sleeving a penis, and the annular airbags are respectively arranged at the front end, middle part and rear end of the cylindrical hose and is used for limiting the penis during air inflation; the annular airbags are connected to air inflation openings in the rear end of the cylindrical hose through air inflation pipes; the periphery of the rear end of thecylindrical hose is provided with a plurality of stickers for being stuck onto skin; and the cylindrical hose is provided with an inlet valve and an outlet valve for dressing change flushing betweentwo adjacent annular airbags. Compared with gauze banding in the prior art, the device provided by the invention can better keep the penis and a wound clean, has a good positioning effect, brings higher comfort to a patient, does not need to be disassembled in the recovery process, can realize flushing dressing change through the structure, and is more convenient than the manner of repeatedly changing gauze.

The invention relates to an automatic locking drop-proof socket plug device. The device comprises a plug part and a socket part, wherein a groove is arranged in the center of the front of a plug body,a spring is arranged in the groove in the front of the plug body, the front of the spring has a convex sheet, the socket part comprises a socket base and a socket cover, the socket base is connectedwith a wire, conductive copper sheets are fixed in the socket base, each conductive copper sheet is connected with a copper insert sheet, a turbine lower bayonet is arranged in the middle of the socket base, the socket cover is provided with a turbine upper bayonet, a gear is clamped between the turbine upper bayonet and the turbine upper bayonet, surface patterns of the gear in the turbine upperbayonet are fitted with the convex sheet on the plug body, and one end of a rack extends out of a hole of the socket base. After the plug is inserted into the socket, the plug can be locked automatically, so that the plug does not fall due to looseness of the socket interface and the metal insert sheet, and the plug and the socket are not separated as people pull the plug or the wire unintentionally.

The invention relates to a turning clamp. The structure is that a main framework is mounted on the base; a turning inner tube is mounted in the main framework; a workpiece is fixed on the turning inner tube; the turning inner tube and the workpiece are respectively subjected to axial positioning, end face positioning and angular direction positioning; the turning inner tube and the main framework are respectively subjected to axial positioning, end face positioning and angular direction positioning. The turning clamp is a tool for processing a butt-joint molded surface of a worm wheel cover, so that requirements on the coaxiality, the size and the angular direction position of the molded surface butted to the worm wheel cover are guaranteed; the turning clamp is convenient to dismount and mount, high in practicability and high in processing efficiency.

The invention belongs to the technical field of advertising boards, and particularly relates to a rotatable advertising board of a taxi roof. The rotatable advertising board comprises a base, a rectangular advertising board body, a wind energy mechanism and an adjusting mechanism, wherein the rectangular advertising board body can be stopped rotatably switching when a taxi is driven at high speed,and can intermittently and rotatably switch when the taxi is driven at low speed, and therefore four-surface advertisements can be effectively publicized through the rectangular advertising board body. Through a design that a fourth gear is driven by engagement periodicity of the arc section of a third gear to rotate, a worm wheel can intermittently rotate accordingly, and thus the advertising surfaces can be intermittently and rotatably switched through the rectangular advertising board body; as the rectangular advertising board body intermittently and rotatably switches, the time requirement when advertising language of one surface of the rectangular advertising board body is externally publicized is met. The worm wheel is in thread fit with the worm end on a fourth rotating shaft, andthrough the traditional self-locking function of the worm wheel and the worm, it is guaranteed that the rectangular advertising board body can be limited after rotating 90 degrees, and the possibilitythat the rectangular advertising board body freely and rotatably switches under the external influence is avoided.

The invention relates to a wire winder with the controllable length. The wire winder with the controllable length comprises a rotary plate, wherein a stretchable wire winds on the rotary plate; a rotary support is arranged on the rotary plate in a matching way; a guiding plate is arranged on the top part of the rotary support in a matching way; a limiting mechanism is arranged between the guidingplate and the rotary plate in a matching way; a wire length adjusting mechanism is arranged between the guiding plate and the rotary plate in a matching way; and an elastic resetting piece matching with the stretchable wire is arranged in the wire length adjusting mechanism in a matching way. According to the wire winder with the controllable length provided by the invention, the functions of adjusting the length of a wire body, safety winding the wire, and limiting are considered, so that an unused rope or belt can be automatically winded into the mechanism, and the cleanliness and the tidiness of a use site are ensured; and the wire winder with the controllable length is simple and convenient to operate, all operations can be accomplished by one person, and no external power supply or power is needed, so that the safety and the flexibility in using the wire winder by a user are considered.

The invention relates to the technical field of shutter blind installation, in particular to a hollow shutter glass window facilitating replacement of a shutter blind. The hollow shutter glass windowcomprises a mounting rack and frames arranged at the two ends of the mounting rack, and the interior of the mounting rack is connected with clamping blocks through pressure springs; the ends of the clamping blocks are rotatably connected with regulating components, and each frame is internally provided with a mounting area which is fit with the corresponding regulating component; and the outer side of each frame is provided with a limiting component communicating with the corresponding mounting area. The installation of the mounting rack and the frames can be finished through rotatable installation of rotating blocks and rotating rods, and the operation is simple and convenient; the fixed installation effect of the rotating blocks and the rotating rods is better; the size of arc-shaped grooves is smaller than the size of the rotating rods, and it is ensured that the rotating rods on the outer sides are limited through sliding rods and the inner walls of arc-shaped segments; when the rotating rod is rotated in the corresponding arc-shaped segment, the rotating rod is in contact with an arc-shaped rod, so that the arc-shaped rod is rotated in the corresponding arc-shaped groove for limiting the other rotating rod; and the installation limiting effect of the rotating rods is further improved.

The invention relates to the field of optoelectronics, in particular to a three-side plastic frame size detecting device. The device comprises a machine table, a detecting substrate is mounted on a surface of the machine table, an external limiting mechanism and an inner limiting mechanism are respectively arranged on the detecting substrate, the outer limiting mechanism comprises a limited position splint, an upper plane of the detecting substrate is provided with a driving sleeve, a transmission threaded column penetrates through the driving sleeve, the driving sleeve is respectively locatedat the left and right ends of the transmission threaded column, the limited position splint is respectively mounted on the corresponding driving sleeve, the inner limiting mechanism includes a limited position frame, the rear side of the limited position frame is provided with a fixing sleeve, the fixing sleeve is installed in the detecting substrate through a movable shaft, threaded sleeves aremounted on the left and right sides of the limited position frame and a frame on the front side, and threaded rods penetrate through the threaded sleeves. The device maintains the complete limiting ofthe plastic frame, so that the plastic frame is supported as a whole, thereby facilitating the detection of the plastic frame.

The invention discloses a construction method for a building girder bridge across a business line. The construction method comprises the following steps that two rows of steel sheet piles are separately driven at the positions being 3.7m from both sides of an upstream and downstream lines of the business line, and the anchorage depth of steel sheet piles is greater than a predetermined value; adjacent steel sheet pile are interlocked; first layers of concrete of a bearing platform and side walls are poured; the positions of steel sheet piles are backfilled and compacted when the steel sheet piles are removed; steel pipes are driven to be grouted and multiple holes are formed in the steel pipes; connection protection of steel pipe columns is arranged, the bottom is reinforced concrete foundation, and the spacing of the steel pipe and columns is 4.2m, the steel pipe columns are connected by channel steel, and wire mesh is arranged between the steel pipe columns; wall body formworks of the side walls adopt steel and wood composite formworks, and the concrete of the side walls is poured three times; cover plate beams are erected by a crane, an overhead bridge is installed by adopting aseparable combination mode; and a temporary traffic crossing is arranged. According to the construction method for the building girder bridge across the business line, the amount of construction blockade of the business line is reduced, the construction period is shortened, and the cost is saved.

The invention provides a novel adjustable type underreaming drill bit used for a well. The drill bit includes a lifting main body, an underreaming wing main body, a bottom plate, a central positioningshaft and a limit main body; the central positioning shaft is coaxially sleeved by the lifting main body; one end of the underreaming wing main body is hinged to the lower side of the lifting main body, and the other end of the underreaming wing main body is hinged to the upper surface of the bottom plate; the lower end of the central positioning shaft vertically and coaxially penetrates throughthe bottom plate; the lower end of the central positioning shaft is coaxially provided with an inserting tip; and the limit main body vertically passes through the lifting main body. By adoption of the underreaming drill bit, the novel adjustable type underreaming drill bit can meet hole expanding requirements of drilling hole diameters of various specifications, enables a work progress of a continuous hole expanding operation to be shortened, enables the service life of the entire underreaming drill bit to be prolonged, and can ensure a good accurate opening angle of an underreaming wing to improve the hole expanding quality and effectively avoid cost loss.

The invention relates to a channel steel automatic machining production line. The channel steel automatic machining production line comprises a conveying rail, the conveying rail is sequentially provided with a first horizontal section, a vertical torsion section, a vertical section, a horizontal torsion section and a second horizontal section in the length direction of the conveying rail, a plasma cutting assembly and a drilling assembly are sequentially arranged on the vertical section, a welding assembly is arranged on the second horizontal section, and a roller seat feeding assembly is further arranged on one side of the second horizontal section; the first horizontal section comprises a first horizontally-arranged bottom plate, the horizontal torsion section comprises a second bottomplate with one end fixedly connected with the first bottom plate and the other end twisted by 90 degrees to be in a vertical state, and the vertical section comprises a third bottom plate with one endfixedly connected with the second bottom plate and vertically arranged; and the horizontal torsion section comprises a fourth bottom plate with one end fixedly connected with the third bottom plate and the other end twisted by 90 degrees in the direction opposite to the horizontal torsion section to be in a horizontal state, and the second horizontal section comprises a fifth bottom plate fixedlyconnected with the fourth bottom plate. The channel steel automatic machining production line has the effects of facilitating automatic machining of channel steel, reducing labor intensity and improving working efficiency.

The invention belongs to the technical field of chemical preparation, and particularly relates to a drying device for zinc oxide preparation, which comprises a base and a hollow rotating shaft rotationally assembled between two supporting columns, the hollow rotating shaft is fixedly connected with a drying cylinder, the drying cylinder is obliquely arranged on the surface of the hollow rotating shaft, and the supporting columns are provided with air inlet mechanisms matched with the hollow rotating shaft. The lower side of the feeding hopper is provided with a discharging pipe, the outer side of the discharging pipe is sleeved with a connecting pipe, a springback mechanism is arranged between the mounting plate and the lower side of the feeding hopper, the lower side of the feeding hopper is provided with an electromagnet, the outer surface of the higher side of the drying cylinder is fixedly connected with a fixing ring concentric with the hollow rotating shaft, and the inner wall of the drying cylinder is provided with an abutting blocking mechanism matched with the feeding port. The zinc oxide nanoparticle drying device is simple in structure and reasonable in design, the drying effect on zinc oxide nanoparticles is improved, meanwhile, connection between the feeding hopper and the drying cylinder is facilitated, and the design is ingenious.

The invention relates to the field of sports skateboards, and in particular to a multifunctional combined sports skateboard, which comprises a middle section of skateboard, two sliding wheel groups which are symmetrically arranged at the bottom of the middle section of skateboard and two spliced skateboards which are arranged at the left and right ends of the middle section of skateboard and are detachably connected to the middle section of skateboard, wherein a detachable shoe cover is arranged at the top of the middle section of skateboard; the middle section of skateboard is of a rectangular structure, and a rectangular through slot is each formed in the parts, close to the front and back sides, of the middle section of skateboard; the two sliding wheel groups are arranged in the corresponding rectangular through slots; the two sliding wheel groups are same in structure and both the two sliding wheel groups comprise a plurality of mounting blocks; one end of each of the mounting blocks is hinged in the rectangular through slots in the corresponding positions, and a first roller is hinged at the other end of each of the mounting blocks; and a detachable guide piece is each arranged at the bottoms of two ends, which are mutually kept away from each other, of two spliced skateboards. The sports skateboard provided by the invention, through flexible detaching and mounting, can adapt to various training function varieties, so that the quantity of apparatuses can be reduced, and subsequently, a school can be facilitated in operations.

The invention discloses a telescopic rotary mechanism of an automobile sound panel. Structurally, the telescopic rotary mechanism comprises a telescopic rotary base, a sound panel, a panel protectivecover, a panel protective groove, and a locking screw, wherein the panel protective cover is a cuboid, the panel protective groove integrally penetrates through from front to rear in the middle, the panel protective groove is a trapezoid groove, the upper bottom surface faces the rear side, the panel protective cover is locked with the sound panel, and four front corners of the sound panel are locked with the telescopic rotary base through locking screws. When the mechanism is used, the mechanism is rotated in a positioned place through springs, troughs and clamps of the mechanism, and the panel ejects when being used in a telescopic and rotary manner, so that the panel can be controlled stably when being expanded and rotated, and the sound panel is prevented from moving due to misopertionand is convenient to take out, and is convenient to use.

The invention provides an opening-closing limit tooling in the vehicle door coating process, which comprises a fixing buckle, a rotating shaft, a telescopic rod, mounting plates and limit spring pieces. Two limit spring pieces are arranged symmetrically, two ends of the limit spring pieces are clamped in a first mounting plate and a second mounting plate respectively, the middles of the limit spring pieces are limit sections, the limit sections close to the two ends of the limit spring pieces have opposite limit rotating angles, and the two ends of the limit spring pieces form a door opening limit part and a door closing limit part respectively; the rotating shaft is arranged on the fixing buckle, one end of the telescopic rod is rotationally sleeved on the rotating shaft, the other end of the telescopic rod passes through the first mounting plate and extends into the limit sections in the middle of the limit spring pieces, and the top end of the telescopic rod is provided with a limit head the width of which is slightly larger than that between the limit rotating angles; and the fixing buckle is connected and fixed with a vehicle body, and the mounting plates are connected and fixed with a vehicle door. The tooling can ensure limit after the vehicle door is opened and closed, avoid deformation caused by mounting the tooling to a mounting hole of the vehicle door, is favorable for ensuring quality of the vehicle door and the mounting hole of the vehicle body, and has reliable limit and convenient use.