31results about How to "Guaranteed aperture" patented technology

The invention relates to a preparation method of a ceramic filtration supporter for the filtering dust removal of high temperature gas. The preparation method comprises the steps of mixing materials, formation and firing, the materials include aggregate, high temperature binding agent and pore forming agent, wherein the aggregate is spherical granule aggregate, the formation adopts isostatic compaction with the formation pressure being controlled in a range from 40 to 150 MPa and the firing temperature being controlled in a range from 1000 to 1300 DEG C, and the heat is preserved for 2 to 3 hours. The resultant ceramic filtration supporter has appropriate pore diameter and porosity, good gas permeability, high strength and good overall properties.

The invention discloses high-precision air filter paper which comprises body paper and an impregnant for impregnating the body paper, wherein the body paper comprises glass fiber, alkali treated cotton linter pulp, polylactic acid fiber, a defoaming agent, a dispersing agent, a wet strength agent, a waterproof agent and a brightener; the impregnant comprises phenolic resin, styrene-acrylic emulsion, normal hexane, methanol, N-hydroxymethyl acrylamide and a wetting agent. The invention further discloses a preparation method of the high-precision air filter paper. Through the preparation method, the obtained high-precision air filter paper has the characteristics of relatively high filter precision, relatively low filter resistance, relatively high pollutant carrying capacity, long service life and good quality stability.

The invention discloses electrostatic air filter paper. The electrostatic air filter paper is prepared from polypropylene/polyester composite, chopped glass fiber cotton, modified nano cellulose and waterproof emulsion. The invention also discloses a preparation method of the electrostatic air filter paper. The preparation method comprises the following steps: firstly, beating; secondly, dispersing; thirdly, mixing pulp; fourthly, forming; fifthly, hot pressing; sixthly, impregnating; seventhly, drying. The electrostatic air filter paper obtained by the preparation method disclosed by the invention has the characteristics of higher filtering efficiency, relatively-low filtering resistance and good quality stability.

The invention relates to microporous carbon aerogel and a preparation method thereof. The microporous carbon aerogel is prepared by adding mixed eutectic molten salt composed of LiNO3, KNO3 and K2SO4 in a step of preparing organic wet gel; parameters include that specific surface area is 850-1350m2/g, pore size distribution is 1-2nm, pore volume is 0.38-0.43cm3/g, and adsorption amount of CO2 at normal temperature and normal pressure is 3.2-3.8mmol/g. The microporous carbon aerogel prepared by the method is high in specific surface area, narrow in pore size distribution range, large in pore volume and high in ability of adsorbing carbon dioxide. The preparation method is simple in steps, convenient to operate, low in production cost, short in process time and environment-friendly.

The invention relates to a construction method of a long auger drilling guncreting expanded bore pile, and belongs to the technical field of pile foundation construction. The construction method comprises the following steps that S1, a straight hole is drilled; S2, a bottom expansion drill bit carries out expansion construction on an expansion head at the pile end; S3, concrete is poured into a pile hole through drill rods and the bottom expansion drill bit in a pressure manner, after pouring of a bottom expansion hole part is completed, the bottom expansion drill bit shifts up and down, and concrete on the bottom expansion hole part is stirred again; S4, the bottom expansion drill bit is closed, a drill is lifted up, and concrete is poured into the pile hole continuously in a pressure manner till the drill is lifted to the ground; S5, a vibrator is used for placing a reinforcement cage into the pile hole; and S6, after pile forming, maintaining is carried out, and checking is carriedout. The construction method has the effects that construction is convenient, stability between the expanded bore pile and soil is enhanced, and the bearing capacity of the expanded bore pile is guaranteed.

The invention discloses a stink-leaking prevention device, which includes a water draining pipe and a diversion cover. The lower end of the water draining pipe is bended towards the inner part and towards the upper part in the axis direction to form a water collecting pipe; the upper end of the water collecting pipe is provided with a sealed plate, a plurality of water draining holes are formed inthe lateral wall of the water collecting pipe, a water collecting cavity is formed between the space of the external wall of the water collecting pipe and the internal wall of the water draining pipe, and internal holes of the water collecting pipe are water outlet poles; and the diversion cover is installed on the sealed plate, and free ends of the diversion cover are mounted in the water collecting cavity. According to the stink-leaking prevention device, the function of the stink-leaking prevention is better achieved, and at the same time, the speed of water draining is greatly improved. The invention further discloses a floor drain with stink-leaking prevention device.

The invention discloses a double-layer deodorant floor drain. The double-layer deodorant floor drain includes a floor drain body, the floor drain body includes a lower barrel body and an upper barrelbody, the inner diameter of the upper barrel body is larger than the inner diameter of the lower barrel body, and the upper barrel body is connected with the lower barrel body by a step plate, a valvedeck assembly is arranged in the lower barrel body of the floor drain body and includes a fixing plate, a jumping valve and a valve deck, wherein the jumping valve is fixed to the fixing plate, the valve deck is arranged on a jumping head of the jumping valve, the fixing plate abuts against a flange block at the bottom end of the lower barrel body, the valve deck can seal or open the upper end ofthe lower barrel body, and the upper surface of the valve deck is always lower than or is flush with the top surface of the upper barrel body; intervals are arranged between the outer side surface ofthe valve deck and the inner wall of the upper barrel body; and a supporting seat further fixedly sleeves the jumping valve. According to the double-layer deodorant floor drain, double deodorant grantee is arranged, thus the deodorant effect of the whole floor drain is greatly improved, and meanwhile, compared with an existing floor drain, the drainage speed of the double-layer deodorant floor drain can help the floor drain launch more quickly.

The invention discloses a forming die for a machining method for high-strength transverse 8-shaped parts. The forming die comprises an upper template, an upper die fixed on the upper template, a lower template and a lower die fixed on the lower template, wherein the upper die is provided with an upper die cavity; the lower die is provided with a lower die cavity; the upper die cavity is matched with the lower die cavity to form a transverse 8-shaped inner cavity; a guide plate and a pair of locating rods moving relative to the guide plate are arranged in two side cavities on the lower die adapted with the middle position of the lower die cavity respectively; and the locating rods are clamped between the guide plate and the inner wall of a metal tube. The forming die solves the problems that the machining accuracy of the current die cannot be ensured easily and the machined transverse 8-shaped parts have a short service life, and meets the requirement of a customer better.

The invention discloses a graphene composite photocatalytic ultrafiltration membrane, and a preparation method thereof. The preparation method comprises the following steps: firstly, blending grapheneoxide and polysulfone to prepare a membrane; improving the hydrophilic and anti-pollution capabilities of the ultrafiltration membrane by utilizing the graphene oxide; then, taking a dispersion liquid of aminated titanium dioxide and water as a solidification liquid to carry out suction filtration and solidification on the semi-solidified ultrafiltration membrane; crosslinking amino groups of aminated titanium dioxide with carboxyl groups of carboxylated graphene oxide in the curing process, so that the binding force of titanium dioxide nanoparticles and the membrane is improved through physical and chemical dual effects, and the problem of loss of photocatalytic particles in a traditional photocatalytic ultrafiltration membrane is solved.

The invention discloses a nanofiber filter layer production device. The device comprises an unwinding end, a winding end, a mounting shell, a reciprocating dropping mechanism and a high-pressure device, the reciprocating liquid dropping mechanism comprises a plurality of rope bodies, a plurality of liquid drop discharging devices, a fixing plate and a side driving piece, the unwinding end and thewinding end are distributed on the two sides of the mounting shell, a base material is wound by the winding end after being released by the unwinding end, the base material moves along the high-pressure section, the reciprocating liquid dropping mechanism drops material liquid drops to the rope body, and the material liquid drops are drawn upwards under the action of the high-pressure section andcover the base material. The high-pressure device forms upward power, a liquid outlet spray head is positioned below the side of the rope body, the liquid outlet spray head discharges liquid along theside face of the rope body, the liquid moves upwards under the action of the high-pressure section, the liquid drops contact with the lower portion of the rope body and then are drawn upwards, the contact area of the liquid drops and the rope body is increased, the drawing effect is good, the filtering effect of the nanofiber layer is improved, and meanwhile the problem of shielding interferenceis solved through inclined liquid discharging.

The invention discloses a drill jig for processing positioning holes of a bead-fixed ring. By using the drill jig to process positioning holes of the bead-fixed ring, the processing precisions of apertures and pitches of the positioning holes can be ensured. The drill jig comprises an upper mould, a middle mould and a lower mould, wherein the upper mould is fixedly connected with the lower mould through the middle mould; a space is left between the upper mould and the lower mould; the upper mould drill holes are arranged on the upper mould, and the lower mould drill holes corresponding to theupper mould drill holes are arranged on the lower mould; and a positioning pin is arranged at an upper side surface of the lower mould, which can be matched with a bead-fixed hole of the bead-fixed ring.

The invention relates to a carrier unbonded steel strand anchor cable, and belongs to the technical field of ground anchors special for foundation engineering. The anchor cable comprises an unbonded steel strand used for being inserted into an underground drilled hole, a locking anchorage device and a carrier, wherein the locking anchorage device is attached to one end face of the carrier; the carrier extends in the longitudinal direction of the steel strand to form a long-strip-sleeve shape; the steel strand penetrates into the long-strip-sleeve, and one end of the steel strand penetrates through one end face of the carrier and then is fixedly connected with the locking anchorage device; and the length of the carrier is far larger than the diameter of the hole. According to the anchor cable, due to the fact that the outer wall of the sleeve of the carrier is bonded and fixed to surrounding cement, the anchoring force of the anchor cable can be improved, or the hole diameter of the drilled hole is reduced under the condition that the anchoring force of the anchor cable is guaranteed, and the anchor cable can adapt to complex and changeable stratum structures.

The invention relates to a processing method for a steering vertical shaft seat of a wheeled armored vehicle, in particular to a precision processing method for a steering vertical shaft seat of an 8×8 wheeled armored vehicle. Through a special processing machine tool, the method of processing the vertical shaft seat by reverse pulling is adopted, which solves the technical problems such as the high rework probability of the vertical shaft seat of the steering shaft seat and the welding deformation of the shaft seat hole. The processing process is as follows: install the special processing machine tool under the ground level, install the wheeled armored vehicle on the positioning and clamping device of the special processing machine tool, make the boring tool pass through the bottom hole of the vertical shaft seat from bottom to top, and make the boring tool go from Up and down movement completes the machining of the shaft seat hole. In the process of processing, a special measuring device is used to realize the measurement with a tool, and the diameter of the boring tool is adjusted according to the measurement data to complete the machining of the vertical shaft seat. The invention avoids the structural limitation of the 8×8 wheeled infantry fighting vehicle, and completes the machining of the vertical shaft seat from bottom to top on the outside of the vehicle, ensures the position and aperture of the vertical shaft seat, and reduces the rework probability of the vertical shaft seat.