36results about How to "Reduce maintenance replacement time" patented technology

The invention relates to a ball-cage-type universal shaft of a screw drill. The ball-cage-type universal shaft of the screw drill is used for linkage and power transmission of the screw drill. Outer sleeve connectors at the two ends of the screw drill are connected with a transmission shaft and a rotor of the screw drill respectively. Each outer sleeve connector is connected with a middle shaft through a steel ball inside a retaining frame. The end portion of each outer sleeve connector is provided with a sealing cover, and the end portion of each sealing cover is provided with a clamping cover. A clamping ring and a safe pulling device are sequentially arranged between each sealing cover and the corresponding retaining frame. Shock-absorbing devices are arranged on the connection portions of the outer sleeve connectors and the middle shaft. The ball-cage-type universal shaft is good in shock-absorption and sealing performance and high in high-temperature resistance, high-pressure resistance and abrasion resistance, the service life is greatly prolonged, and the ball-cage-type universal shaft can normally work in the environment with high pressure of 7 atm or 0.7 MPa at a high temperature of 180 DEG C, can continuously safely run for more than 400 hours underground in a failure-free state, is strong in underground operation adaptation ability, convenient to install and adjust, quick, easy and convenient to disassemble and assemble and capable of effectively shortening maintenance and replacement time and improves drilling efficiency.

The invention discloses a suspension type air inlet filter cotton fixing structure and a fixing method. The fixing structure includes an air inlet plate, a grille plate, a first overturned pressing plate assembly, a second overturning pressing plate assembly, filter cotton and two stoppers , the grille plate is located at the lower part of the air inlet plate, the filter cotton is located between the grille plate and the air inlet plate, the upper end of each limiting member is fixedly connected to the air inlet plate, and the lower end passes through the grille plate, the first overturning platen assembly One end of the second turning platen assembly is rotatably connected to the lower end of the corresponding stopper, and the other ends of the first turning platen assembly and the second turning platen assembly are detachably connected to the lower surface of the air inlet plate. The invention adopts the specially designed overturning pressure plate assembly to cooperate with the air inlet plate and the grille plate, and the fixing, disassembly and replacement of the filter cotton can be quickly realized by rotating the overturning pressure plate assembly, without the need to disassemble the structural parts as a whole, which can effectively reduce the maintenance and replacement time .

The invention discloses an angling cylinder mounting seat, a body support and engineering machinery, wherein the angling cylinder mounting seat is used for mounting an angling cylinder. The angling cylinder mounting seat comprises mounting seat side plates and a mounting seat bottom plate, wherein one of the mounting seat side plates is provided with a reciprocating motion plane contacting with the angling cylinder, the mounting seat bottom plate is connected with the mounting seat side plates and detachably connected to the body support used for mounting the angling cylinder. According to the angling cylinder mounting seat, the body support and the engineering machinery, when the reciprocating motion plane, contacting with the angling cylinder, of the angling cylinder mounting seat is abraded and loses efficacy, the angling cylinder mounting seat is detached off alone to complete repair and replacement, and thus maintainability of equipment is effectively promoted.

An oxygen blowing metal hose long in service life comprises a corrugated pipe, and a first joint and a second joint are arranged at the two ends of the corrugated pipe; the outer side of the corrugated pipe is wrapped with a metal net body, and the corrugated pipe is of a five-segment type structure formed by sequentially connecting a first pressure-resisting segment, a first transition segment, a high-flexibility segment, a second transition segment and a second pressure-resisting segment; the first pressure-resisting segment and the second pressure-resisting segment on the two sides of the corrugated pipe are in omega shapes; and the high-flexibility segment located in the middle portion of the corrugated pipe is in a deep-U-shaped wave shape, and the first transition segment and the second transition segment are in U-shaped wave shapes. According to the characteristics that the two sides of the corrugated pipe are bad in working condition and large in bearing pressure, the pressure-resisting segments in the omega shapes are arranged on the two sides of the corrugated pipe; according to the characteristic that due to insufficient flexibility, the dynamic bending portion of the middle segment of the corrugated pipe is prone to being damaged, the middle segment of the corrugated pipe is designed to be the high-flexibility segment in the deep-U-shaped wave shape; and through the improvement, the service life of the oxygen blowing metal hose is greatly prolonged, the maintenance and replacement time is greatly shortened, and improvement of steel smelting efficiency is facilitated.

The invention belongs to the technical field of road and bridge engineering, and relates to a surface seamless type bridge expansion joint. The surface seamless type bridge expansion joint is characterized in that lower sliding plate blocks are fixed to the tops of two cement main beams through anchoring devices respectively, elastic deformation bodies are arranged at the two ends of a bearing plate, one end of each elastic deformation body is fixedly connected with the bearing plate, the other ends of the elastic deformation bodies are fixedly connected with connecting steel bars reserved on the main beams, sliding shafts are arranged between the tops of the two cement main beams and the bearing plate, lubricant grooves are formed in the contact faces of the lower sliding plate blocks and the bearing plate, antiskid grooves are formed in the contact face of the bearing plate and a bridge deck pavement layer, and a limiting check block is fixed to the middle of the lower portion of the bearing plate. The surface seamless type bridge expansion joint has the advantages that telescopic deformation of a bridge is mainly completed below the bearing plate and on the elastic deformation bodies and the bridge deck pavement layer, due to the fact that the surface of the bridge expansion joint has no seam, running comfort is improved, the impact action of running loads to the bridge is weakened, the constriction period is short, the maintenance and replacement time of the expansion joint is shortened, bridge deck maintenance and pavement layer modification are facilitated, and the service life is prolonged.

The invention relates to a pipeline fixing device and a pipeline fixing method for a space station, belonging to the field of aerospace technology, and solves the problems in the prior art that the pipelines of various systems in the space station are fixed or loosened with low efficiency and the fixing method is easy to fail. The pipeline fixing device of the present invention includes a pipeline fixing frame and a compression device; the compression device includes a compression device body and a locking structure, and the locking structure is used to adjust the locking force received by the compression device body; the compression device body The first end is hinged to the first end of the pipeline fixing frame. The invention is used for fixing pipelines used in space stations.

The invention discloses a novel airport assembly pavement system, which includes a field foundation, a base layer arranged on the foundation, a flexible transition layer, and a prefabricated road panel; a method for controlling the flatness precision of the field foundation and the top surface of the base layer, and a flexible transition layer The construction control method, the precise positioning and installation method of the prefabricated pavement, the detachable connection structure of the pavement and the rapid replacement method of the prefabricated pavement realize the accurate and rapid installation, replacement and maintenance of the airport pavement. This system and method improves the quality and durability of the airport pavement, avoids the wet operation of concrete in the construction of the airport pavement, greatly improves the mechanization and intelligence level of construction, effectively reduces the amount of labor, and significantly shortens the on-site pavement construction period. In order to greatly improve the efficiency and convenience of airport track construction, operation and maintenance in areas with poor weather conditions, short construction period and resource scarcity. At the same time, the time required for maintenance and replacement of road panels is greatly reduced, which better meets the needs of high-efficiency operation of busy transport airports.

The invention discloses an air-conditioning capacitor discharge system which comprises a switching circuit, a rectifying circuit, a filter circuit, an inverter circuit, a motor and an operation control circuit. The switching circuit controls switching on or off of an input power supply; the rectifying circuit rectifies the input alternating current power supply; the filter circuit contains capacitance and filters the rectified power supply; the inverter circuit is driven by output of the filter circuit; the motor is driven by output of the inverter circuit; one output end of the operation control circuit is connected to the switching circuit so as to control switching on or off of the switching circuit upon the input power supply, and the other output end is connected to the inverter circuit, so that when the switching circuit is disconnected with the input power supply, the inverter circuit is controlled to output direct current to the motor. By the air-conditioning capacitor discharge system which is simple to operate and safe and reliable, electric charge stored by capacitance on the filter circuit can be rapidly released, and maintaining and replacing time is saved.

The invention aims to provide a wear-resistant fan suitable for delivering high-concentration dust. The wear-resistant fan comprises a rotor spindle, a wheel cap and a blade. The blade is formed by welding an inner central disk and an outer central disk, the rotor spindle is fixedly connected with the inner central disk through a connecting bolt, the wear-resistant fan is characterized by further comprising a protection cover, one end of the protection cover is welded with the spindle, the other end of the protection cover is welded with the inner central disk, and accordingly the connecting bolt covers an inner space enclosed by the protection cover, the spindle and the inner middle disk. An air inlet end of the blade most subjected to wear is protected by utilizing a wear-resistant nose, the blade is protected by utilizing a wear-resistant plate, and the wear-resistant nose and the wear-resistant plate can be replaced limitlessly, and accordingly service life of a rotor of the fan can be greatly prolonged; and time for maintenance and replacement is greatly shortened, loss of a user caused by halt is lowered to the minimum, and accordingly cost is saved, and productivity is increased.

The invention discloses a power high-voltage switch cabinet graded pressure relief mechanism, which comprises a cabinet top cover, a pressure relief through groove, a hinge support, a top plate, mounting buckles, a nylon bolt and a sealing ring I. The pressure relief through groove is formed in the middle of the front face of the cabinet top cover, and the hinge support is fixedly mounted at the inner bottom of one edge of the pressure relief through groove. By additionally arranging a secondary pressure relief plate on the existing top plate and mounting the secondary pressure relief plate ona pressure bearing steel plate through a pressure relief tension spring, fault gas pressures can be divided into three grades, namely the impact gas pressure which can be borne by an operator, the impact gas pressure which cannot cut off the nylon bolt, and the impact gas pressure which can cut off the nylon bolt, correspondingly, pressure relief is carried out by opening a cabinet door by the operator, pressure relief is carried out in the modes that fault gas jacks the secondary pressure relief plate and passes through a gap opening between the secondary pressure relief plate and the top plate through a vent hole, and pressure relief is carried out by shearing the nylon bolt and completely opening the top plate, so that the different fault gas pressures can be relieved in a graded modeto improve safety performance of pressure relief of the fault gas of a power distribution cabinet.