155results about How to "Guarantee the quality of maintenance" patented technology

The invention provides a freezing method of a frozen wall of a frozen wall of an inclined shaft, solving the problems of difficulty in digging in the construction because an aquifer of the inclined shaft is frozen and low construction speed and meeting safe and rapid construction requirements of the aquifer of the inclined shaft. The freezing method comprises the following steps of: drilling multiple rows of freezing holes which are parallel to each other and vertically distributed, on the group, along an axial freezing range of the inclined shaft, wherein the row number of the freezing holes is determined according to the cross section size of the inclined shaft and the required freezing time, the freezing holes at the lateral part and the freezing holes at the end part respectively go deep into a water-resisting layer in the depth, water in the aquifer at the lower part is isolated by the water-resisting layer, and the freezing holes at the top go deep into the top of the inclined shaft in depth; then arranging a freezing pipe and a liquid supply pipe in each drilled freezing hole, wherein the freezing pipe and the liquid supply pipe in each drilled freezing hole are communicated with an external freezing station; and finally, starting the freezing station and enabling low-temperature saline water prepared by the freezing station to flow in the each freezing pipe to absorb heat of the stratum around each freezing pipe to form a frozen cylinder, wherein all frozen cylinders are continuously enlarged and further connected to form the frozen wall which can resist earth pressure and water pressure.

The invention discloses a method for restoring a threaded hole of a locomotive axle box pull rod seat. The method comprises the steps that 1, locating basis fixing is carried out; 2, the threaded hole of the axle box pull rod seat is reamed, wherein a phi24.5 auger bit is used for drilling a threaded bottom hole in an axle box pull rod seat threaded hole workpiece, phi24.43o<+0.375> of the drilled threaded bottom hole and the relative position dimension are guaranteed, and the depth is 98o<+1> mm; 3, a guide thread of the threaded hole of the axle box pull rod seat is tapped; 4, hand tapping is carried out; 5, tapping residues are removed; 6, a steel wire screw sleeve is mounted; and 7, inspection is carried out through a go gauge and a non-go gauge. According to the method for restoring the threaded hole of the locomotive axle box pull rod seat, more labor and time can be saved during maintenance of the locomotive framework axle box pull rod seat, labor intensity is effectively lowered, and maintenance cost is reduced; and the maintenance process is simplified, the technical difficulty coefficient of maintenance is reduced, and the maintenance quality of the locomotive framework axle box pull rod seat can be guaranteed.

The invention provides an elevation type tail water overhauling platform, which comprises an elevating gear, a platform main girder, a platform auxiliary girder, a support girder and a platform plate. The elevating gear is connected and fixedly arranged on the platform main girder, the platform auxiliary girder is crossly fixed on the platform main girder, the support girder is fixedly arranged on the platform main girder and/or the platform auxiliary girder, both ends of the support girder are respectively connected and fixed on the platform main girder and/or the platform auxiliary girder, and the platform plate is fixedly arranged on the platform main girder, the platform auxiliary girder and the support girder. The platform causes a two-dimensional plane working position to expand to a three-dimensional solid working position by the elevation and descent of the platform, thus facilitating the inspection, maintenance and overhauling of any part such as tail water pipe inner wall and hydroturbine vanes.

The invention relates to the field of civil engineering, in particular to a curing method for a concrete column body structure. A sprinkling bucket provided with dripping holes is arranged at the top of a concrete column, so unmanned uninterrupted maintenance for the concrete column can be realized; in addition, a plastic film wraps the side face of the concrete column, so that all faces of the concrete column are enabled to be in a wet state, and a better guarantee is provided for the curing quality of the concrete. According to the curing method, the labor cost and the cost of laying a curing water pipe are reduced, and better economy is obtained.

The invention discloses a method for maintaining a coke oven door with higher efficiency. The points of the method different from those of the common method are as follows: firstly, after the oven door is introduced on a maintenance scaffolding, a temporary fixing piece is used to fixedly connect an oven door body and brick grooves, and then an oven door body connecting bolt and brick groove connecting bolts are released; secondly, knife edges and knife-edge web plates are disassembled, maintained and reassembled; thirdly, after the oven door body connecting bolt and the brick groove connecting bolts are refastened, the temporary fixing piece is disassembled. The oven door body and the brick grooves are not disassembled and the parts of the knife edges and the knife-edge web plates which are usually damaged are pertinently overhauled during the maintenance process, thereby the maintenance quality can be guaranteed; simultaneously, lining tiles are not required to be cleaned and rebuilt and no relative displacement is generated between the brick grooves of the oven door body during the maintenance process, thereby the method is convenient for contraposition and recovery assembly of various detachable parts, can shorten the maintenance time and reduce the maintenance cost, and is particularly suitable for being applied to the overhaul of the coke oven door.

The invention provides a special fixture for knife edge angle square repair, and belongs to the technical field of measuring instrument maintenance. The special fixture for knife edge angle square repair solves the problems of repair difficultness and ineffectiveness due to the fact that no effective professional fixture for positioning is provided in the repair process of grinding equipment of existing knife edge angle squares. The special fixture for knife edge angle square repair comprises a base plate, a workpiece clamping device and a datum plane positioning device for eliminate positioning errors, wherein the datum plane positioning device includes an X-axis positioning portion, a Y-axis positioning portion and a Z-axis positioning portion, the workpiece clamping device includes an X-axis clamping portion and a Z-axis clamping portion, the X-axis clamping portion and the X-axis positioning portion are respectively arranged beside both sides of a workpiece and matches with each other to clamp the workpiece, and the Z-axis clamping portion and the Z-axis positioning portion are respectively arranged beside both sides of the workpiece and matches with each other to clamp the workpiece. According to the special fixture for knife edge angle square repair, a plurality of positioning portions and clamping portions are used for positioning the workpiece in three dimensions, so that the positioning errors are eliminated, and the stability of the workpiece in the repair process is ensured.

The invention relates to the technical field of concrete manufacturing, and specifically relates to a concrete maintenance device comprising a water catchment layer, a foam plastic layer and a linen layer. The water catchment layer is a plastic film bag with water-permeable holes opened in its bottom. The plastic film bag is arranged above the foam plastic layer. The foam plastic layer is arranged above the linen layer. The peripheries of the water catchment layer, the foam plastic layer and the linen layer are connected head-to-tail and sealed by limiting plates. The plastic film bag is connected with a water pipe; and the water pipe is communicated with a water tank through a water pump. The concrete maintenance device is simple in structure; the arrangement of the water catchment layer can ensure the foam plastic layer to be always in a wet state; the foam plastic layer provides a water source having enough water to the linen layer, thereby allowing the linen layer to completely absorb water for conveniently implementing heat preservation and wet preservation operations to the concrete. The concrete maintenance device is convenient to use, is water-saving and labor-saving, and is able to keep the humidity and the substantially constant temperature of the concrete maintenance surface, accordingly ensuring the concrete maintenance quality as much as possible.

The invention relates to the field of a metallurgical equipment maintaining method, in particular to a stainless steel furnace cover crack repairing method capable of rapidly realizing stainless steelfurnace cover crack repairing. The stainless steel furnace cover crack repairing method comprises the following steps: A, performing preparation before welding: (a) drilling the tail end of the crackby a drill bit to form a crack stopping hole, (b) selecting a grinding machine to eliminate crack defects, and (c) drying welding rods; B, welding; C, performing checkout and surface treatment: (a) examining air hole, slag inclusion and undercutting defects on the surface of a weld joint after cooling a welding joint to room temperature, and (b) polishing the surface residual height of the weld joint by an angular grinding machine to be in level with the surface of the original weld joint and perform transition smoothness with the edge fusing position; and D, after the above checkout and surface treatment are qualified, completing crack repairing. By the stainless steel furnace cover crack repairing method, the repairing quality is guaranteed, the furnace cover repairing and maintaining time can be shortened to 2 to 3 hours, the furnace stopping time can be effectively shortened, powerful guarantee is provided for recovering normal operation as soon as possible, and the stainless steel furnace cover crack repairing method is particularly suitable for a stainless steel furnace cover crack repairing process.

The invention discloses a method for cleaning bottom equipment of bullet trains. Bottom equipment of three bullet trains are simultaneously subjected to a cleaning flow process in different stages by utilizing three station positions arranged by a bullet train cleaning bank. When a train after being subjected to a first station position cleaning enters into a second station position, the next train enters into a first station position, and when the train after being subjected to a second station position cleaning enters into a third station position, the next train enters into the second station position and the train after the train which enters into the second station position enters into the first station position. A whole set of flow process system used for cleaning the bottom equipment of the bullet trains comprises the main units, such as an industrial dust-absorption system, a high-pressure air blowing system, a high-pressure cleaning system, a control console, an ultrasonic dust cleaner, a mobile dust-absorption device, a fixed pipe net, an intelligent dust-absorption socket, and the like. The system combines high-pressure cleaning with dust absorption and injecting blowing dust absorption, is excellent in integrity, is safe and high-efficient as well as convenient, is conveniently used, can avoid pollution, and meets the demand of automatic modern development.

The invention discloses a simple automatic laminating device on a vibrating beam. The simple automatic laminating device comprises the vibrating beam, a support base is arranged at the upper end of the vibrating beam, a low support is arranged at the upper end of the support base, a high support is arranged on one side of the low support, a rotating shaft is arranged in the low support and the high support in a penetrating mode, a film roll is arranged on the outer side of the rotating shaft in a penetrating mode, a laminating rolling bar is arranged on the side, close to the film roll, of thevibrating beam, a film is arranged between the film roll and the laminating rolling bar, and a rolling bar traction rod is arranged on the side, close to the vibrating beam, of the laminating rollingbar. According to the device, by arranging the low support and the high support, film lap joint can be facilitated, and the maintenance quality of film covering is ensured. By arranging the laminating rolling bar, the film can be evenly, flatly and tightly attached to the surface of concrete, and the frequency of manual rework is reduced. By arranging the support base, the low support and the high support can be mounted and dismounted more conveniently.

The invention provides an intelligent hybrid maintenance method for a motor train unit. The method comprises steps of detecting the motor train unit through a primary maintenance intelligent comprehensive detection system, and obtaining a first detection result; acquiring operation parameters of the motor train unit, and judging whether the operation parameters conform to a preset threshold valueor not; if yes, the motor train unit being parked on a first maintenance line, and the bottom of the motor train unit being detected through a primary vehicle bottom maintenance comprehensive detection system; if not, the motor train unit being stopped on a second maintenance line, and the bottom of the motor train unit being detected; detecting the wheel set of the motor train unit; monitoring the detection process through a monitoring system; and judging whether the detection result meets a preset standard or not, and if yes, sending the detection result to a database for storage. The methodis advantaged in that manual participation links in the maintenance process of the motor train unit can be reduced, and the maintenance quality of the motor train unit is guaranteed, in addition, theembodiment of the invention provides an intelligent hybrid maintenance device and equipment for the motor train unit and a storage medium.

The invention discloses off-line test equipment for a continuous casting crystallizer. The off-line test equipment for the continuous casting crystallizer comprises a crystallizer taper adjusting and width adjusting servo motor, a PLC, a frequency changer, a motor speed signal collecting module, a motor position signal collecting module, a motor current signal collecting module and a motor temperature signal collecting module, wherein the control signal output end of the PLC is connected with the control end of the crystallizer taper adjusting and width adjusting servo motor through the frequency changer, and the coder signal output end of the crystallizer taper adjusting and width adjusting servo motor is connected with the feedback signal input end of the PLC through the motor speed signal collecting module, the motor position signal collecting module, the motor current signal collecting module and the motor temperature signal collecting module. The off-line test equipment for the continuous casting crystallizer completes the collection of data such as the speed, the position, the current, the torque, the temperature and the bleed-out forecast thermal couple temperature of the crystallizer taper adjusting and width adjusting servo motor, the data are displayed on a touch screen, a detection result is clear at a glance, the detection capability on off-line area crystallizers is improved, and the overhaul quality of the crystallizers used on lines is ensured.