6results about How to "Maintain positioning accuracy" patented technology

The utility model relates to the technical field of oil and gas exploitation, in particular to a double-sealing long-acting well-flushing packer, which comprises an upper joint, an upper core tube, a lower core tube, a lower joint, two pressure sealing rubber sleeves and a plurality of sealing rings, the upper end of the upper core pipe is connected with the upper connector, the lower end of the upper core pipe is connected with the lower core pipe, the lower end of the lower core pipe is connected with the lower connector, the double-sealing long-acting well-flushing packer is sequentially provided with the well-flushing cylinder, the well-flushing valve, the steel ball centralizing device and the setting device, and all the devices can work in a matched mode to achieve setting and well-flushing operation at the same time. According to the double-seal long-acting well-flushing packer, the sealing performance of the packer is enhanced, well flushing operation is allowed, sealing of the packer is not affected, the stability and accuracy of the packer in the well descending process are guaranteed through the setting device and the steel ball centralizing device, and the purposes of reducing construction cost and operation intensity are achieved.

The utility model relates to an air pump motor. A motor stator assembly is arranged on the outer side of a motor rotor assembly; a front-end integrated cover plate is arranged on one side of the motor stator assembly; a rear-end integrated cover plate is arranged on one side of the motor stator assembly; bearings are directly arranged in the front-end integrated cover plate and the rear-end integrated cover plate; inner rings of the bearings are fixed at two ends of the motor rotor assembly; the fixing bolts penetrate through the front-end integrated cover plate, the motor stator assembly and the rear-end integrated cover plate to be fixed, so that the problems that in an existing air pump motor, bearing sleeves are often installed in the front end cover and the rear end cover, then bearings are installed, the air pump needs to be used for a long time, and after the bearing sleeves are installed, the bearing sleeves are damaged are solved. The technical problems that bearing installation precision and positioning precision are not enough, bearing sleeves installed in a front end cover and a rear end cover are heated, bearings are finally clamped, and an air pump motor is damaged are solved.

The utility model provides a tightener for electric power construction, which relates to the technical field of tighteners and comprises a support, a take-up roller is rotatably arranged between the front inner wall and the rear inner wall of the support, a steel rope is wound around the take-up roller, and one end of the steel rope is provided with a joint piece. The combined piece comprises a square block and clamping plates, one end of the square block is fixed to the steel rope, a through groove is formed in the square block, the two movable clamping plates are arranged in the through groove, and a two-way screw is rotationally arranged at one end of the square block and used for controlling the two clamping plates to move. According to the utility model, the two clamping plates clamp a cable at the same time, and force can be uniformly applied from two directions, so that the cable is stably fixed in the circular through groove, shaking and displacement of the cable are reduced, and the cable is stably clamped; and meanwhile, the two clamping plates are screwed through the two-way screw rod and are lifted up and down at the same time, it can be guaranteed that pressure borne by the cable in the circumferential direction is more uniform in the clamping process, and an insulating layer or an internal structure of the cable is prevented from being damaged.

The invention discloses a rapid direct positioning method and device based on deep structured tensor completion, and the method comprises the steps: carrying out the discretization of a target state space of a to-be-positioned target, and constructing a high-dimensional discrete grid frame corresponding to a high-order target positioning likelihood tensor; performing sparse sampling on the high-dimensional discrete grid frame to obtain a sparse observation tensor; performing structured decomposition on the sparse observation tensor through a preset deep structured tensor complementation network to obtain a main peak structure representing a real state of the target and a background structure representing environmental interference; and determining a target state estimation value of the to-be-positioned target based on the maximum index of the factor vector of the main peak structure. According to the method, full-grid exhaustion search is not needed, and on the premise of keeping DPD physical structure characteristics and positioning precision, the calculation complexity is remarkably reduced, the likelihood value calculation total amount is reduced, and the positioning robustness and generalization ability are improved.

The utility model belongs to the technical field of baby carriages, and particularly relates to a baby carriage. A baby carriage includes: a backrest; the headrest is mounted on the backrest; the height adjusting mechanism is arranged between the headrest and the backrest and comprises a gear strip which is fixedly mounted on the backrest, the gear strip extends in the vertical direction, a plurality of gear grooves which are arranged at intervals in the vertical direction are formed in the side face of the gear strip, and the gear grooves are formed in a transverse opening manner; the gear shifting assembly is fixedly mounted on the headrest and is opposite to the gear strip; the driving piece comprises a driving rod capable of moving in the vertical direction and a handle located on the outer side of the gear shifting assembly; the telescopic piece can elastically stretch out and draw back in the transverse direction; and the linkage structure is connected between the driving rod and the telescopic piece. The utility model has the advantages of better durability and stronger positioning stability.

This utility model discloses a gas-liquid dual-phase pulse device for pipeline cleaning, comprising: a gas-water pulse nozzle for spraying pulsed water to clean the pipeline, and a rotating mounting plate at its bottom end; an electric lifting rod with a lifting connecting plate fixedly mounted on the top of its telescopic end, a rotating positioning column integrally formed at the top of the lifting connecting plate, a rotating sleeve rotatably sleeved on the outer wall of the rotating positioning column, and the rotating sleeve welded to the lower surface of the rotating mounting plate; and a fixing ring fixedly sleeved on the outer wall of the tail end of the gas-water pulse nozzle. This utility model perfectly combines flexible multi-dimensional positioning and aiming capabilities with a carefully designed rigid support, stable structure, and buffer mechanism, enabling the operator to quickly and accurately align the nozzle with the pipeline inlet, and maintaining the stability and positioning accuracy of the entire device when subjected to strong gas-liquid pulse jet recoil force, ensuring efficient and safe pipeline cleaning operations.