736results about How to "Not easy to block" patented technology

The invention discloses a rotary annular-seam spray nozzle comprising a core seat, a rotary core and a rotary annular-seam spray hole, wherein a core cavity is arranged in the core seat, an inlet and an outlet which are communicated with the core cavity are arranged on the core seat, a core seat inlet is communicated with a pressure flow source, the rotary core can be sleeved into the core cavity in positioning and rotating modes and is concentric with the core cavity, a rotation-promoting flow path is arranged on the rotary core or/and the wall of the core cavity in order to mutually rotate the rotary core and the core cavity by using flow power, one end of the rotary core is penetrated into the core seat outlet, and the penetrating end forms the rotary annular-seam spray hole with the inner wall of the core seat outlet. The cross section of the spray hole of the rotary annular-seam spray nozzle is an annular seam, the annular seam and a diameter can be set to respectively and conveniently control the fineness and the flow of pressure spray and make liquid drop sizes more evenly and finely distributed. The rotary annular-seam spray nozzle has a self-cleaning function, is not easy to block and is in a self-closing dust-resisting type; the rotary annular-seam spray nozzle is arranged on a spray head body or the core seat of the rotary annular-seam spray nozzle is connected with the spray head body, the spray head body is communicated with the pressure flow source, and therefore, the spray device with the rotary annular-seam spray nozzle can be formed.

The invention relates to a granular anti-hardening acid-base dual-purpose ternary micro-electrolysis filler and a preparation method thereof. The grain size of the filler ranges from 1mm to 5mm, and iron powder, aluminium powder and graphite powder are mixed in a mass ratio of (2-6):(2-6):1 to perform granulation and then are sintered by being isolated from air, thus obtaining the filler. The micro-electrolysis filler is applicable to micro electronic treatment on acid sewage or base sewage. According to the invention, the efficiency of micro electrolysis on the sewage is high, a filling areais not easy to harden, and the period of back flushing is long. When the ternary micro-electrolysis filler is used for treating the sewage, CODcr (chemical oxygen demand) of the sewage can be reducedefficiently in a short time, and the biochemistry of the sewage can be improved. According to the invention, the raw materials are easy to obtain, the preparation process is simple, the problem of filler hardening of the conventional micro-electrolysis technology is solved, and the filler is applicable to treatment on the base sewage.

The invention provides a synchronous grouting method for recycling large-diameter waste slurry generated during slurry shield. The product per cubic meter is prepared from the following raw materials by weight: 100-180kg of cement, 50-120kg of slaked lime, 120-350kg of fly ash, 1300-1500kg of sand, 500-800kg of waste slurry, 0.5-2kg of water-retaining thickener, 0.5-2kg of water reducer, 0.5-2kg of retarder and 0.5-2kg of air entraining agent. The method has the advantages that expensive bentonite is unnecessary to be added, and about 100kg of bentonite is saved by mortar per cubic meter, thus effectively reducing the cost; the method has the advantages of good pumpability, water-retaining property, lubricating property, flowability, filling property and the like, and is used for fully utilizing the waste slurry.

The invention discloses a device for preventing coal from burning spontaneously and rapidly extinguishing under a coal mine and a working method thereof. The device comprises a cylindrical foamed shell of which the two ends contract, wherein one end of the foamed shell is connected with a compressed air line; one side of the compressed air line is provided with a foam stock solution inlet; the other end of the foamed shell is connected with a foam output pipeline; 6-8 groups of spiral blades are arranged on a hollow shaft of an axis in the foamed shell at certain intervals; air outlet holes are formed among the spiral blades; included angles between the turning directions of the spiral blades and the axial direction of the hollow shaft are 45-60 degrees; each group of spiral blades has the same turning direction; and two adjacent groups of spiral blades have opposite turning directions. A mixture is foamed twice, so that the foaming times are raised to 50-150 times rapidly within a short period of time, and the aims of preventing and controlling spontaneous turning of coal and rapidly extinguishing are fulfilled.

The invention belongs to the field of a fruit and vegetable machine and particularly discloses a filter screen mechanism for a fruit and vegetable squeezing and grinding machine. The filter screen mechanism comprises an upper filter screen and a lower filter screen; a middle ring screen is also arranged between the upper filter screen and the lower filter screen; the middle ring screen is fixedly provided with a shielding ring; the shielding ring is provided with a plurality of notches; the notches are positioned in a mesh region of the middle ring screen; and the aperture of each mesh of the middle ring screen is respectively greater than those of each mesh of the upper filter screen and each mesh of the lower filter screen. The invention also discloses the fruit and vegetable squeezing and grinding machine utilizing the filter screen mechanism, which comprises the filter screen mechanism and a screw drive mechanism. The screw drive mechanism comprises a screw and a center shaft; the center shaft is connected with the screw; the screw is connected with a motor shaft; the screw is a spinning-cone-shaped sphere with a small upper part and a big lower part; the outer surface of the sphere is provided with a helix-shaped convex strip; the center shaft of the screw is coincided with a center shaft of the upper filter screen; gaps are formed between the edge of the screw and the inner walls of the upper filter screen, the middle ring screen and the lower filter screen; and fruits rotate along with the screw in the gaps to be processed. The filter screen mechanism and the fruit and vegetable squeezing and grinding machine have the advantage of multiple functions.

The invention relates to a top coal caving hydraulic bracket with large mining height. The hydraulic bracket comprises a base, upright posts, a top beam, a front beam, a shield beam, a tail beam and an insertion plate; the top beam is supported on the base through four upright posts; the front beam and the shield beam are hinged with the front end and the rear end of the top beam respectively; the shield beam is also connected with a connecting rod; the front part of the front beam is provided with a telescopic beam which is connected with the front beam through a telescopic beam jack; the front end of the telescopic beam is hinged with the rear part of a protective plate; one end of a protective plate jack is connected with the telescopic beam; the other end pf the protective plate jack is connected with the tail part of the protective plate; the front end of the tail beam is hinged with the shield beam; the other end of the tail beam is connected with the shield beam through a tail beam jack; and the insertion plate is positioned in the inside of the tail beam. The hydraulic bracket has the advantages that the hydraulic bracket has large mining height and high working resistance, can realize top coal caving and can also realize overall height mining once when the thickness of the coal is 4.5 meters.

The invention discloses a vertical machining device and method for a small-caliber PCCP. The vertical machining device and method are suitable for small-caliber pipes, operation is convenient, and the sealing effect is good. The vertical machining device comprises a vertical inner die, an outer die and a pouring device. The inner die is provided with an axial straight slit penetrating through the inner die in the height direction, and two slit openings of the straight slit are fixedly connected with a movable door plate and a driven door plate respectively. The inner die is internally provided with a stretching and contracting device which comprises a drive shaft, a driven shaft, a support, a reduction gear set and at least three movable door plate driving mechanisms. According to the vertical machining device and method for the small-caliber PCCP, the stretching and contracting device and a locking device having the heights basically identical with the height of the inner die are used, wherein the heights of the stretching and contracting device and the locking device can be slightly smaller than the height of the inner die when being applied, and the stretching and contracting device is large in torque, high in evenness of force transmitted out from the driven shaft with the same rigidity and good in movement speed and synchronism. The locking device is transmitted through a screw rod, drives a sliding plate in linear movement and achieves locking of the movable door plate in the stretched state through a wedge mechanism.

The invention discloses a porous carbon material and its preparation method. The preparation method provided by the invention successively comprises steps of: raw material and auxiliary material selection, pulverization, spheroidization, grading, burdening, mixing, molding, roasting and the like. Green petroleum coke and green pitch coke are creatively used as raw materials. A filtration materialprepared after spheroidization of a green coke powder has large contractility, high strength, uniform pore distribution, smooth pore path, high filtration precision and good transmissivity, is not easy to block during the purification process, is easy to regenerate, and has long service life. The porous carbon material prepared in the invention can be widely used as a filtration material, a thermal insulation material, a conductance electrode and the like.

The invention discloses a building roof construction process. A construction roof comprises a roof structure plate, a parapet wall and a roof surface layer, wherein the parapet wall is arranged above the roof structure plate, the roof surface layer is paved on the roof structure plate, a roof exhaust system is arranged on the construction roof and comprises a plurality of first horizontal exhaust pipes, the first horizontal exhaust pipes are respectively laid in a slope finding layer or a heat insulation layer in the roof surface layer, two ends of each first horizontal exhaust pipe are respectively connected with a vertical exhaust pipe, and the vertical exhaust pipes are embedded in the side walls of the parapet wall and a discharge flue or the side wall of an exhaust passage. The construction process of a construction roof comprises the steps of 1, surveying and setting out; 2, parapet wall, discharge flue and exhaust passage construction; 3, horizontal exhaust pipe positioning installation; 4, exhaust pipe connection; 5, roof surface layer construction; and 6, rigid protecting layer mesh division and caulking construction. The construction process has the advantages that the steps are simple, the operability is high, the realization is convenient, in addition, the work efficiency is high, the construction effect is good, and the construction quality of the construction forming building roof can be effectively ensured.

A chemical preparation method (coordination reaction method) for preparing ZnO nanowire array which is based on coordination chemical reaction theory and used in porous anode aluminum oxide template is disclosed. The reactant of the method is dissoluble zinc salt added with aqueous ammonia, but different from the direct deposition method, the product of the preceding reaction Zn(OH)2 is not directly deposited on the pore channel of the aluminum oxide template but is subject to coordination reaction to be precursor---zinc ammonium coordinate, and crystallizing ions in the form of precursor is conveyed into the pore channel of the aluminum oxide template; the precursor is subject to hydrolysis reaction and is converted into Zn(OH)2 in the pore channel of the aluminum oxide template to be deposited; then, Zn(OH)2 is baked to be the target product ZnO in the end. The ZnO nanowire prepared by the method of the invention has high pore channel filling rate and continuous, compact and filled line, and when using high quality aluminum oxide template, the ZnO nanowire array is regular and uniform.

The invention discloses a floor-type screening and crushing device. A material supply belt conveyor (1) is connected with a feed inlet of a screening machine (3) through a material supply guide tube (2). A qualified material outlet of the screening machine (3) is connected with an inlet of a funnel-shaped discharge tube (6). An unqualified material outlet of the screening machine (3) is connected with a discharge outlet of a crushing machine (4) through an unqualified material discharge tube (7). The funnel-shaped discharge tube (6) and the unqualified material discharge tube (7) are partitioned through a partition baffle (8). The big-end-up funnel-shaped discharge tube is adopted for being connected with the qualified material outlet of the screening machine, the height of the funnel-shaped discharge tube is in direct proportion to the screening capacity and the floor height, large-grain-diameter unqualified materials mixed at the qualified material outlet of the screening machine can be subjected to secondary screening and crushing, and the screening area is enlarged. The floor-type layout is adopted, so that the installing space is narrowed; and coal materials collide with the walls of guide tubes under the effect of gravity, repeated screening and crushing are achieved, and the screening effect is good.