33results about How to "Solve unfavorable problems" patented technology

The invention discloses a side groove sliding card type dry hanging structure for stone materials, which includes stone materials, keels, sliding card type pendants (2) and integrated pendants (3), the keel is fixed on the wall, and the slide card type pendants ( 2) It is connected to the keel by bolts (4); side grooves (6) are opened on the upper and lower sides of the stone, and the integrated pendant (3) includes stone planting pieces, which are embedded in the side grooves (6), and the integrated pendant (3) Fix it on the sliding card type pendant (2) by adjusting the screw (5). The invention effectively solves many unfavorable problems existing in the traditional stone dry-hanging technology, improves the safety factor; reduces on-site welding, avoids the hidden danger of aging and falling off caused by the use of marble glue, avoids on-site manual slotting, reduces on-site dust pollution, and improves The installation efficiency reduces the construction cost, improves the construction efficiency, and shortens the stone installation period.

The invention belongs to the technical field of neutron generators, and in particular relates to a self-shielding DD neutron generator, comprising a sealed cube-shaped shielding body composed of a first shielding body (1) and a second shielding body (2). A first cavity (3) is set inside the first shield (1), and a second cavity (82) is set inside the second shield (2). When the first shield (1) and the second shield (2) When closed, the first cavity (3) and the second cavity (82) jointly constitute the equipment compartment where the main part of the neutron generator is arranged; the main part of the neutron generator is used to generate neutrons through DD reaction. The neutron generation of this neutron generator can be remotely controlled, and the structure can be disassembled. The main consumables are repairable target chips and ion sources, and the service life is basically unlimited; the floor area is only 2m 2 , to realize the use of DD neutron generators in ordinary rooms, without the need to build a separate neutron shielding hall.

The present invention discloses a gravel / sand filtration layer - Porous concrete pile foundation and composite processing method of the external structure foundation gravel / sand filtration layer, internally porous concrete, the pile diameter of 0.3 ~ 0.8m, pile external gravel / sand filtration layer having a thickness of 0.2 ~ 0.4m, curing underwater porous concrete compressive strength of not less than 5 MPa 28d, permeability coefficient of not less than 5mm / s, the pile from the pile diameter 3-5 times, cellular concrete a porosity of> 20%.The foundation processing method as follows: The ground settlement and the bearing capacity is determined from the pile and the pile diameter, range of foundation reinforcement, reinforcing depth, the pile arrangement, the amount of the filler hole of the pile, the pile of wet clay or particulate material thickness, pile construction, the foundation problem effectively weakens the slurry of porous concrete pile congestion, gravel / sand filtration layer permeable filtration play the advantages of the pile can be continued effective drainage composite foundation.

The invention relates to a method for preparing a compound methanol gasoline additive, which is characterized in that the compound methanol gasoline additive has hydrotropy, anti-rubber swelling property, oxidation resistance, metal corrosion resistance and combustion-supporting property. The additive comprises 10-55% of methyl tert-butyl ether, 0.05-10% of BTA, 15-60% of isopropyl alcohol, 0.03-25% of p-toluidine, 0.02%-12% of octadecylamine and 0.1-15% of 2,6 di-t-butyl-p-cresol. When the additive is used, firstly the prepared additive is mixed with methanol, and then mixed with a certain proportion of base gasoline uniformly to obtain methanol gasoline fuel. No ash is generated after the methanol gasoline prepared from the compound additive is combusted, and the emission of harmful substances in the exhaust can be greatly reduced. The additive has good low-temperature stability and dynamic performance, the normal operation of the engine system can not be affected on the premise of not changing the structure of the engine condition. The compound methanol gasoline additive has wide sources of raw materials, simple process and easy popularization.

The invention relates to a sediment oxygen demand (SOD) determination device based on electromagnetic dynamic, and a using method. The SOD determination device comprises a testing room, a dynamic room, a magnetic rotor, a magnetic pole, a motor, a dissolved oxygen probe socket, support fixing interfaces and a storage battery, wherein the testing room is in a cylinder structure with the bottom end opened and the runway-shaped cross section; the dissolved oxygen probe socket is formed on one side of the top of the testing room; the support fixing interfaces are arranged at the two ends of the top of the testing room respectively; the dynamic room is a cylindrical barrel and reversely fixed at the top of the testing room; the motor connected with the magnetic pole is arranged in the dynamic room, and is externally connected with the storage battery by a connecting line; the magnetic rotor is placed in the testing room, and is in magnetic connection with the magnetic pole; a hand-held support is connected and fixed to allow the device to be submerged in water and to be filled with overlying water; the dissolved oxygen probe is inserted and sealed; the device is then fixed at the bottom of the water; overlying water circulation of the testing room is adjusted and controlled; and an SOD is determined. The device is simple in structure, easy to dismount, small and exquisite in size, and convenient to carry, and can effectively determine the SOD under the action of different hydrodynamic forces.

The invention discloses a self-excited atomic magnetic sensor for liquid crystal phase compensation and a magnetic field measurement method, which are used for a magnetometer. The self-excited atomicmagnetic sensor comprises a pumping light path perpendicular to the direction of the magnetic field, a probe light path along the direction of the magnetic field, and a circuit closed loop. The pumping light path sequentially comprises an atomic air chamber, a first polarizer, an acousto-optic modulator, and a laser. The probe light path sequentially comprises a photoelectric detector, an atomic air chamber in the pumping light path, a second wave plate1 / 4, a liquid crystal, a first wave plate1 / 4, a second polarizer, and a laser. The closed loop portion of the circuit comprises a photoelectricdetector, an amplifying comparator, a power driver, an acousto-optic modulator, and a counter. According to the liquid crystal phase compensation scheme, a phase shift caused by a circuit coil can beavoided, a phase shift of a larger range magnetic field can be achieved, and the problem that the circuit is unfavorable in the phase shift is solved by combining a light intensity modulation magnetometer and a self-excited magnetometer, the response speed is high, the liquid crystal phase compensation scheme is suitable for the various atomics, and the application value is high.

The invention relates to a hollow slab bridge structure with end floor beams and a construction method thereof, and belongs to the technical field of civil construction. The hollow slab bridge structure comprises a precast hollow slab, the end floor beams and a cast-in-situ structure layer. The precast hollow slab is supported by temporary supports which are arranged on two adjacent pier caps side by side in the horizontal direction of a bridge, the end floor beams supported by permanent supports are cast on the peripheral portions of the two ends of the precast hollow slab, and the cast-in-situ structure layer formed with the end floor beams together is cast on the end floor beams and the precast hollow slab. The hollow slab bridge structure is simple, the construction method is simple, the horizontal load transmission capacity of the hollow slab bridge structure with the end floor beams is improved, and the defect that a bridge structure is at an unfavorable stress state easily when supports of an existing domestic assembled type hollow slab bridge disengage is overcome.

The invention relates to a processing method for improving the surface hydrophobicity of masson pine wood. The treatment and modification of masson pine wood is carried out. Compared with the treatment of masson pine wood, the hydrophobic treatment containing hydrophobic dispersed particles is used Under intermittent temperature rise, the carrier liquid and the loaded particles work together to increase the hydrophobic effect of the plate by 30-40%, and the surface has better hydrophobic performance, because the treatment agent containing organosilane can form a gap between the particles and the particles. The covalent bond makes the interior of the wood always have a high hydrophobicity, and can prevent the wood from becoming hydrophobic under the action of external forces such as light and friction. The stability after processing is also improved, and the production process is easy to control. , to solve the unfavorable problems in the processing and utilization of masson pine wood, the hydrophobicity is significantly enhanced, and its application range is broadened.