33results about How to "Avoid repeated installation" patented technology

The invention discloses a radial azimuth stepless adjustment for a gas drilling manifold, comprising a fixing sub, a fastener, a hanging flange and a rotating sub; the upper end of the rotating sub is in insertion connection and hermetic fit with the fixing sub, the lower end of the rotating sub is provided with an outlet connection end having predetermined fixing angle, the hanging flange sleeves the rotating sub, the fastener is positioned between the lower end of the fixing sub and the hanging flange, the rotating sub is hung to the fastener, the hanging flange is fixedly connected to the lower end of the fixing sub through a screw set, a roller bearing is disposed in an annular space between the fastener and the hanging flange, and a roller bearing is disposed between the fastener and the lower end of the fixing sub. The radial azimuth stepless adjustment enables the direction of a sand discharge line to be adjusted and enables the sand discharge line to be quickly connected out of a well site, repeated mounting and demounting is avoided, workload and work intensity are greatly reduced for workers, mounting period is shortened, worker cost and crane application expenditure are reduced.

The invention discloses a mobile tunnel supporting structure and a tunnel construction method implemented under the protection effect of the mobile tunnel supporting structure. The mobile supporting structure consists of a plurality of boxes which are connected to one another in a gripped manner according to the shape of the outer contour of a tunnel; a shield which extends rearwards is arranged at the tail of each box; and under the protection effect of the mobile supporting structure consisting of the boxes which are gripped to form a ring and the shields at the tails of the boxes, tunnel excavation and lining can be carried out safely and quickly. The tunnel construction method implemented under the protection effect of the mobile tunnel supporting structure mainly comprises the following steps of land preparation, assembly of the mobile supporting structure, mounting debugging of construction equipment, positioning of the mobile supporting structure and positioning of the equipment, tunnel excavation and assembly or primary supporting construction of prefabricated members. By the mobile supporting structure, slidable tunnel advance supporting can be implemented; and multi-ring tunnel advance supporting construction is not required under the condition of a complex formation, the equipment does not need to be detached or mounted repeatedly, cost is reduced, and the work efficiency is improved. Moreover, the construction method has high safety and high universality, and is convenient and easy to implement.

Provided is a composite die for trimming and piercing of forgings. The composite die is used for synchronous machining of trimming and piercing of perforated forgings formed by forging. The composite die comprises a base; the base is provided with a fixedly-connected female die holder and a rotationally-connected piercing punch; the female die holder is detachably connected with a female die used for cutting off flashes of the outer walls of the perforated forgings; an elastic gasket is arranged below the base; a plurality of guide through holes are formed in the base; the elastic gasket is provided with an ejector rod in sliding connection with the guide through holes; the ejector rod is connected with a supporting plate, and the supporting plate can slide on the outer side of the piercing punch in the axis direction of the piercing punch and is used for supporting the perforated forgings; the female die is detachably connected with a scraper blade; and a trimming punch in sliding connection with the scraper blade is arranged above the female die. The composite die for trimming and piercing of the forgings reduces the manufacturing cost and improves the production efficiency.

Disclosed is a magnetic bearing stiffness testing device and method. The magnetic bearing stiffness testing device comprises a base, a two-dimensional motion platform, a force sensor support, a force sensor, a magnetic bearing rotor module, a magnetic bearing rotor mounting rack, a magnetic bearing stator module and a magnetic bearing stator mounting rack, wherein the force sensor can achieve zero adjustment through the force sensor support; through the two-dimensional motion platform, a rotor and a stator can generate relative displacement; a current source can set current inside a stator coil, and the force sensor can obtain the stress conditions between the stator and the rotor; according to the relation between stress and displacement as well as the relation between stress and current, the current stiffness and the displacement stiffness of a magnetic bearing can be obtained. The magnetic bearing stiffness testing device and method can solve the problem of stiffness measurement of high-load and high-stiffness magnetic bearings, achieve rapid and automatic measurement of the current stiffness and the displacement stiffness of the high-load and high-stiffness magnetic bearings and meet the requirement on mass production of products.

The invention discloses a movable hanger operating platform which structurally comprises a truss lower, two pairs of longitudinally symmetrical connecting rod parts are welded on the truss base plate in a transversely symmetrical mode, a monorail trolley is arranged at the upper end of each connecting rod part and forms a kinematic pair with the a repair rail at the bottom of the lower bridge face of a steel trussed beam, the length*width specification of the truss base plate is 16.5m*8m, riffled steel plates are laid on the top face of the truss base plate, and guardrails are arranged on the periphery of the top face of the truss base plate. The invention further discloses manufacturing, installing, using and removing methods of the movable hanger operating platform. The movable hanger operating platform has the advantages of being low in cost, easy to manufacture, convenient to operate and capable of being recycled, and not only overcoming a number of defects of the prior art and solving the problem that construction is inconvenient in an assembling process of the steel trussed beam, but also ensuring that no potential safety hazards of objects falling from high altitude exist and the ambient environment is not polluted, so that the technical purposes of being safe and reliable, reducing cost, shortening construction periods and improving efficiency are achieved.

The invention relates to the technical field of underground space construction, and discloses a pipe curtain construction method based on pipe banks. According to the pipe curtain construction method based on the pipe banks, the pipe banks are used as the construction unit and jacked at the same time for constructing a pipe curtain structure, each pipe bank is formed by arranging a set of steel pipes side by side, every two adjacent steel pipes are connected through a connecting component, and the number of the steel pipes in each set is not smaller than two. By adoption of the pipe curtain construction method based on the pipe banks, the construction efficiency is high, the jacking tendency can be controlled highly, jacking deviation can be rectified easily, and the construction precision is high.

The invention discloses an automatic transmission housing oil seal assembly device and method, which comprises a sleeve, a guide shaft, an oil seal and an adjusting nut; the bottom peripheral surface of the sleeve is provided with threads, and the adjusting nut is nested on the sleeve through the threads; The top end of the shaft extends into the sleeve from the bottom end of the sleeve, and the diameter of the guide shaft near the bottom end is larger than the rest of the guide shaft; the oil seal is nested on the largest diameter part of the guide shaft, and the top end of the oil seal is attached to the bottom end of the sleeve. It can control the distance between the bottom end of the adjusting nut and the bottom end of the sleeve. This distance is the assembly depth of the oil seal, so that the moving distance of the oil seal can be controlled, and the assembly depth of the oil seal can be accurately controlled. Fitting setting, to ensure that the mating surface is always perpendicular to the axial direction during the oil seal assembly process, to ensure that the oil seal does not tilt during assembly, and to ensure the assembly effect of the oil seal.