30results about How to "Quick setting" patented technology

The invention relates to a backfilling method for tunnel construction through a TBM method and equipment for the backfilling method.The backfilling method that TBM pea gravel backfilling and grouting has many technical defects, the time limit for a project cannot be guaranteed, and backfilling quality is quite unstable.According to the backfilling method, backfilling is carried out at 360 degrees in a whole cavity segment between the duct piece outer wall and the surrounding rock wall of a TBM prefabricated lining structure, a bottom arch is backfilled with mortar and quick-setting mortar, arches on the two sides are backfilled with pea gravel grout, and a top arch is backfilled with composite mortar; in other way, the bottom arch is backfilled with mortar and quick-setting mortar, the arches on the two sides are backfilled with fine aggregate concrete and quick-setting fine aggregate concrete, and the top arch is backfilled with composite mortar.The technical advantages of mortar backfilling and fine aggregate concrete backfilling are fully utilized, pea gravel grouting and backfilling are replaced partially or completely, the technical defects of pea gravel grouting and backfilling are overcome, and particularly under the condition of unfavorable geology, the backfilling work efficiency is improved, and engineering quality is guaranteed.

A modular head of a plate overlayer includes a drive motor, drive units a main shaft and a suction port on its frame characterizing that the said head frame is composed of a top bridge plate, a bottom bridge plate and a back plate forming 'U' shape structure, the net width of the said frame has an analog vertical halving plane, an axle plane is formed between the axle line of the drive motor and the mainshalf, both of the two planes are on a same plane, the said drive units arranged adjacent to the vertical halving plane of the U frame symmetrically.

The invention discloses a composite rubber sleeve packer comprising a core tube, an axial compression device and a rubber sleeve component, wherein the axial compression device and the rubber sleeve component are sleeved on the core tube, and the rubber sleeve component is composed of a pressure expanding rubber sleeve and liquid expanding rubber sleeves. The composite rubber sleeve packer has the advantages of rapid setting and long setting time.

The invention relates to the technical field of a bolt tightening process and discloses a calculation method for a bolt rotation angle method-based tightening process. The method comprises the steps of calculating an initial tightening torque and calculating a rotation angle, wherein the initial tightening torque and the rotation angle are obtained by calculation through basic parameters of a bolt and related constants. According to the calculation method, the initial tightening torque and the rotation angle can be obtained before a bolt tightening test is performed by utilizing a rotation angle method, so that the efficiency and reliability of the bolt tightening test are improved.

The invention discloses a powder curing agent for expanded perlite thermal insulation plates, and a preparation method thereof, wherein the powder curing agent comprises the following raw materials byweight: 50-60 parts of power generation chimney ash, 3-8 parts of industrial aluminum sulfate, 5-10 parts of active silica, 25-35 parts of cement clinker powder, 8-12 parts of fluorite powder, and 0.5-1 part of a retarder. According to the present invention, the powder curing agent is prepared from the power generation chimney ash, the industrial aluminum sulfate, the active silica, the cement clinker powder, the fluorite powder and the retarder so as to achieve the reutilization of the industrial and mining waste materials; and the prepared powder curing agent has the rapid setting propertyof gypsum and the high strength of cement, has low-alkalinity so as to significantly reduce the alkali accumulation and peeling phenomena of the thermal insulation plate, further can eliminate radioactive materials, and can flexibly control the molding time during the molding.

The invention relates to a method of converting coupled waste FCC catalyst and fly ash into resources. The method comprises following steps: evenly mixing 20 to 40 wt.% of a waste FCC catalyst, 30 to 50 wt.% of fly ash, and 25 to 50 wt.% of a solid alkali activator to obtain mixed powder; adding water into the mixed powder, wherein the mass ratio of mixed powder to water is 1:0.2-0.4, stirring at a temperature of 70 to 90 DEG C to obtain mixed activated gel; pouring the mixed activated gel into a die, vibrating the mixed activated gel in the die by a vibration rod, (or placing the die on a vibration table and vibrating the die), and carrying out curing, demoulding, and room temperature curing to obtain a gel cured material. The technology is simple and environmentally friendly, the production cost is low, and the additional value is high. The waste FCC catalyst and fly ash are coupled and converted into the gel cured material, which has a high compression strength and strong high temperature resistant performance and can be used as a building material, a fireproof material, a heavy metal sealing material, and the like.

The invention discloses a limiting device of a lifting and pushing mechanism of a mine excavator, which comprises a programmable controller, a human-machine interface, a lifting absolute value coder and a pushing absolute value coder. The limiting device is characterized in that the lifting absolute value coder is connected with a lifting mechanism coiling block through a flexible shaft; the pushing absolute value coder is connected with a shaft of a pushing speed reducer through a flexible shaft; signals of the absolute value coders are connected to a position detection module of the programmable controller through a shielding cable; a central processing unit of the programmable controller reads the signals of the coders in real time through the position detection module; signal values of the signals are compared with a numerical value set by a touch screen to obtain numerical values of different limit points; and the given numerical values of a frequency converter are controlled by using the numerical values of the different limit points so that a lifting and pushing motor is controlled and lifting and pushing limit and pre-limit are controlled. According to the limiting device,the limit is accurate, a mechanical mechanism is protected, operation and control properties are improved, and urgent needs of a large excavator are met.

The invention relates to a method for repairing an insulating end plate at a glued insulating joint, and belongs to the technical field of railway engineering maintenance. According to the method, therepairing device is fixed to a steel rail, the damaged insulating end plate is cut off through the repairing device, the cut fracture is cleaned, glue is injected into the cut fracture through the repairing device, the repairing device is detached after glue injection is completed, and after glue at the glued insulating joint is solidified and formed, repairing work is completed. The method is scientific and reasonable, the process is simple, the repairing device is convenient to operate, the repairing operation time is greatly shortened, the insulation life of the repaired new insulation endplate can be kept for more than one year, the use and maintenance cost of field operation is greatly reduced, manpower, material resources and financial resources are saved, and the method is worthyof application and popularization.

The invention discloses a recoverable downhole packer resistant to high temperature and high pressure. The recoverable downhole packer comprises a center pipe, a power part, a first slip part, a packing part, a second slip part and a second shell, wherein, the power part comprises a first shell, a cylinder body, a piston, a sliding sleeve and a control pipeline; the first slip part can support the inner wall of an oil well casing under the downward pressing and jacking of the sliding sleeve, and can synchronously move downwards along with the downward movement of the sliding sleeve; the packing part comprises a packing rubber sleeve, a high-temperature-resistant rubber sleeve and a base plate which are arranged on the center pipe in a sleeving mode and located below the first slip part; the second slip part can support the inner wall of the oil well casing under the downward pressing and jacking of the sliding sleeve; and the second shell is fixed to the bottom end of the center pipe and fixedly connected with the bottom end of the first slip part. The packer is simple in structure, the structural stability is improved by adopting two clamping connection, and the high-pressure resistance is stronger; the high-temperature-resistant rubber sleeve is arranged to improve the high-temperature-resistant property; and the problems that in the prior art, the packer is complex in structure, large in setting and unsetting difficulty, long in period, high in operation cost and the like are solved.

The invention discloses a pre-buried guide pipe assembly suitable for tunnel curtain grouting with extra-high water pressure and a pre-burying method. A pre-buried guide pipe and a pipe head are used; the pre-buried guide pipe comprises a pipe body, a pipe tail, a pipe cap and a filling bag, the pipe body and the pipe tail are in threaded connection and are both steel pipes, the communicating guide pipe of the pipe body and the pipe tail is filled with the filling bag, the filling bag is a rubber bag, and the length of the filling bag is the same as the sum of the length of the pipe body and the length of the pipe tail; when a grouting stopping wall is poured, the pipe cap is arranged at the head end of the pipe body in a sleeving mode and used for protecting an external thread at the head end of the pipe body; during grouting, the pipe cap is removed; during grouting, the tail end of the pipe head is in threaded connection with the head end of the pipe body; and the head end is used for being connected with a grouting pipe. By using the pre-burying method, in tunnel curtain grouting construction, the pre-buried guide pipe assembled in a segmented mode is designed and pre-buried into the grouting stopping wall to be integrally poured and formed, the tedious positioning and hole forming work in conventional curtain grouting construction is avoided, and damage to the grouting stopping wall is avoided.

The invention provides a method for preparing a geopolymer by coupling an FCC waste catalyst and red mud. According to the method, an FCC waste catalyst is mixed with sintering process red mud; and the preparation method comprises the following steps: regulating the raw material ratio to adjust the calcium-aluminum ratio to 0.3-0.8, adding silica fume to regulate the silicon-aluminum ratio to 1.8-2.2, mixing with a composite alkali activator, injecting into a mould, and carrying out mould forming, curing, demoulding and curing treatment to obtain the high-strength geopolymer. According to themethod, heavy metals in the FCC waste catalyst can be effectively cured, and the sintering process red mud with a high calcium content is combined with the FCC waste catalyst, so that the polymerization and solidification hardening process of the gel excited by the mixture can be effectively regulated and controlled, and the compressive strength of the geopolymer is improved. In this way, the problems of environmental pollution, land occupation and the like are solved, and the purpose of resource utilization of solid wastes is achieved.

The invention provides a step-by-step axial extrusion throttling device of an elastic double rubber tube, which is applied to downhole throttling of gas wells. The throttling body of the throttling device completes the opening and closing of the slip locking body according to the slip pusher to realize quick setting and fishing downhole, and the thrust provided by the spring body completes the initial extrusion of the lower sealing rubber barrel, according to The pressure difference of the fluid before and after throttling pushes the elastic booster to slide upwards to implement the secondary extrusion of the lower sealing rubber cylinder and the overall extrusion of the upper sealing rubber cylinder, and complete the step-by-step axial extrusion of the lower sealing rubber cylinder The upper and lower sealing rubber tubes smoothly return to the initial free state and are easy to unseal after the rubber tube push sleeve slides downward during salvage. The temperature, pressure and flow rate of the fluid. After the throttling, the fluid is adjusted to a steady flow of upward migration through the center pipe, thereby realizing the downhole throttling of conventional gas wells and unconventional gas wells, and preventing the formation of natural gas hydration during downhole throttling. things.