35results about How to "Does not affect water permeability" patented technology

The invention provides a device for preventing a water outlet of a biochemical tank from being blocked by MBBR (Moving Bed Biofilm Reactor) filling. The device comprises a U-shaped water outlet screen mesh arranged at the front part of the water outlet; mesh holes of the water outlet screen mesh are rhombuses with inner angles of 120 degrees and 60 degrees respectively; the edge length of each rhombus is calculated according to the size of the MBBR filling; a rear side of the screen mesh is clung to the inner side of the tank wall, which is provided with the water outlet, of the biochemical tank and covers the water outlet; the upper edge of a front side of the screen mesh is higher than the water level of the biochemical tank; a water outlet aeration pipe, which is connected with an air source through an air conveying pipe and a valve, is arranged on the bottom surface of the screen mesh; a material stopping plate is arranged on the tank wall, above the water outlet hole, of the biochemical tank, the material stopping plate is bent towards to the inner side of the tank and an upper edge of the material stopping plate is higher than the upper edge of the front side of the screen mesh; an assisted aeration pipe, corresponding to the water outlet screen mesh, is arranged at an end part, close to the tank wall, which is provided with the water outlet, of the biochemical tank, on the bottom surface of the biochemical tank. By utilizing the device provided by the invention, the water outlet of the biochemical tank can be effectively prevented from being blocked by the MBBR filling, and phenomena that the operation of equipment is influenced and the MBBR filling is lost due to sewage overflowing caused by the fact that the water outlet is blocked by the MBBR filling are avoided.

The invention discloses a drip tape comprising an upper tape and a lower tape. The lower tape is provided with water pressure reducers. A filter is disposed between the upper tape and the lower tape, so that irrigation water which is filtered before entering the drip tape is filtered again by the filter before entering the water pressure reducers, and the irrigation water which is filtered again can drop from the water pressure reducers. A filter layer is added to the drip tape, so that before the irrigation water enters the water pressure reducers of the drip tape, various particles such as sand in the irrigation water can be further filtered, chances of pores of the pressure reducers being blocked are slimmed, the service life of the drip tape is prolonged and service efficiency is improved.

The invention discloses a net cage with a feed collecting structure and a method. The net cage comprises a net rack, a cylindrical main net, a fixing plate, an upright column, a net folding mechanismand a mesh storage mechanism, wherein the main net is arranged on the net rack and provided with an upper opening; the fixing plate is arranged in a soil layer below the bottom face of the main net, the upright column is arranged on the fixing plate and penetrates through the bottom face of the main net, the net folding mechanism is arranged on the upper portion of the upright column, and the meshstorage mechanism is arranged on the lower portion of the upright column. An air cylinder is arranged on the upper portion of the upright column, and a telescopic rod of the air cylinder is connectedwith the net folding mechanism. The net cage further comprises a cylindrical auxiliary net located in the main net, the mesh size of the auxiliary net is smaller than that of feed particles, and M sector-shaped meshes are arranged in the mesh storage mechanism. The net cage has the advantage that waste of the feed particles is effectively avoided, it is ensured that the feed particles are kept clean and sanitary, and the utilization rate of feed is effectively increased.

The invention provides a special reinforcing agent for ready-mixed pervious concrete and a preparation method thereof. The special reinforcing agent for the ready-mixed pervious concrete includes thefollowing raw materials by mass: 40-45% of anti-cracking component, 20-25% of flexural component, 2%-4% of thickening component, 19-24% of adhesive component and 10-15% of water reduction component. The dosage of the special reinforcing agent in the pervious concrete is 2-3% of the mass of a cementing material. The reinforcing agent can not only effectively prevent the late shrinkage of the pervious concrete and reduce the stress cracking, but also significantly improve the flexural resistance and the frost resistance of the pervious concrete, ensures the mechanical property and the durabilityof pervious concrete pavements, and enhances the water retention and the slump retention of the previous concrete to meet the construction requirements of the ready-mixed concrete. The reinforcing agent is beneficial to prepare the premixed medium and high strength pervious concrete.

The invention discloses a sidewalk stereo structure and a construction method thereof. The sidewalk stereo structure comprises an underground layer and floor tiles. Fixing frames are arranged on a waterproof layer at the bottom of the underground layer, and the fixing frames are formed into a cubic shape by a plurality of sets of bottom frame rods, a plurality of sets of vertical frame rods and a plurality of top frame rods, a rectangle or a square formed by the top frame rods is provided with inserting holes at the four corners, connecting holes are formed in the middles of the top frame rods at the edges of the fixing frames, arc-shaped grooves are formed from the connecting holes to the edges of the top frame rods, and two inserting feet of a U-shaped clamp are inserted into the connecting holes of the two adjacent fixing frames. The layer face where the fixing frames are located is filled with sandy soil, the corresponding inserting holes at the bottoms of the floor tiles are provided with inserting feet, the floor tiles cover the top frame rods to form a square grid, and the inserting feet of the floor tiles are inserted into the inserting holes. The sidewalk structure is firm in structure, can avoid liable collapse and displacement of the floor tiles of a sidewalk, and the water draining property is good. The invention further provides a construction method of the sidewalk stereo structure. The technical scheme of the sidewalk stereo structure and the construction method thereof can better overcome the defects that the floor tiles of the sidewalk are prone to collapsing and accumulating water, and the sidewalk stereo structure can be paved rapider and more convenient.

The invention discloses a drip irrigation belt. The drip irrigation belt includes an upper belt body and a lower belt body, and the lower belt body is provided with a water pressure reducer. Among them, a filter device is also provided between the upper belt body and the lower belt body, so that the filtered irrigation water before entering the drip irrigation belt is filtered again by the filter device before entering the water pressure reducer, and the filtered irrigation water is filtered again before entering the water pressure reducer. Can drip out via water reducer. Due to the addition of a filter layer in the drip irrigation belt, it is possible to further filter various particles such as sediment in the irrigation water before the irrigation water enters the water pressure reducer of the drip irrigation belt, reducing the chance of the micropores in the pressure reducer being blocked. , Extend the service life of the drip irrigation belt and improve the efficiency of use.

The invention discloses a culture net cage with a high degree of cleanliness and a method thereof, comprising a net frame, a cylindrical main net arranged on the net frame with an upper end opening, a fixing plate arranged in the soil layer below the bottom surface of the main net, The column on the fixed plate that passes through the bottom of the main net, the upper net mechanism and the lower net mechanism on the lower part of the column; there is a tension spring between the lower net mechanism and the fixed plate, and a cylinder is installed on the fixed plate , the telescopic rod of the cylinder is in contact with the lower net mechanism; it also includes a cylindrical auxiliary net located at the upper end of the main net. The mesh size of the auxiliary net is smaller than the size of the feed particles. The mechanism is connected with several lower retractors arranged at the lower part of the net frame. The invention has the characteristics that the area under the net cage can be automatically cleaned to ensure no eutrophication around the net cage and effectively improve the utilization rate of the feed.

The present invention discloses a kind of energy-saving ecological farm irrigation canal. It is characterized by that it includes canal single body, said canal single body is formed from left and right two independent subbodies, and its intermediate can be equipped with intermediate shelf board which can be used for making said two independent subbodies be connected together. The invented farm irrigation canal not only is favourable for ecological environment protection, but also is favourable for growth of crops.

The invention discloses a breeding device and method with high feed utilization rate, which comprises a net frame, a cylindrical main net with an upper end opening arranged on the net frame, a fixed plate arranged in the soil layer below the bottom surface of the main net, The column on the fixed plate that passes through the bottom of the main net, the upper net mechanism and the lower net mechanism located on the lower part of the column; a tension spring is arranged between the lower net mechanism and the fixed plate, and the fixed plate is provided with a second One cylinder, the telescopic rod of the first cylinder is in contact with the lower net mechanism; it also includes a cylindrical auxiliary net with an upper opening in the main net, the mesh size of the auxiliary net is smaller than the size of the feed particles, and the lower edges of the auxiliary net are respectively It is connected with the lower netting mechanism and several lower retractors arranged at the lower part of the net frame. The invention has the characteristics of effectively avoiding the waste of feed particles, ensuring that the feed particles are kept in a clean and hygienic state, and effectively improving the utilization rate of the feed.

The invention discloses a water transfer printing backing paper having the single-surface anti-adhesion characteristic and a preparation method of the water transfer printing backing paper. An anti-adhesion layer which is made of one or several of a silicone oil substance, a wax substance and a fluororesin substance is formed on the nonprinting surface of the water transfer printing backing paper, when water transfer printing decalcomania paper is stacked, the anti-adhesion layer and a flexible coating film of the water transfer printing decalcomania paper are directly contacted and can not be bonded together; in addition, the anti-adhesion layer neither affect the water permeability and the repasting property of the water transfer printing decalcomania paper, nor affect the printing effect of the printing surface.

The invention discloses a three-dimensional interwoven composite bottom fabric and a papermaking felt. The bottom fabric comprises at least two base fabrics which are stacked up and down, an includedangle between wefts of the adjacent two base fabrics is 2-15 DEG; and the papermaking felt comprises the three-dimensional interwoven composite bottom fabric and a plurality of fiber layers located atthe upper side and the lower side of the bottom fabric. Warps and wefts of the base fabrics in the three-dimensional interwoven composite bottom fabric are not overlapped after being sewed, a certainincluded angle exists between the warps and wefts of the adjacent base fabrics, and compressed marks do not exist in the use process, so the high line pressure resistance is greatly improved, and thewater permeability is not affected by long-term use. The papermaking felt of the invention has a high resistance to the high line pressure, a high speed increase and a low steam consumption, is suitable for high-rod diameter blind hole pressing, shoe pressing and other pressing forms of medium and high speed paper machines, and is used for making various culture papers, corrugated base papers, high-grade fine dried noodle wrapping paper, paperboards and other types of paper.

The invention discloses a net cage with a feed collection structure and a method thereof, comprising a net frame, a cylindrical main net arranged on the net frame with an open upper end, and a fixed plate arranged in the soil layer below the bottom surface of the main net , the column that passes through the bottom of the main net on the fixed plate, the net collection mechanism that is located on the upper part of the column, and the mesh storage mechanism that is located on the lower part of the column; the upper part of the column is provided with a cylinder, and the telescopic rod of the cylinder is connected with the net collection mechanism ; It also includes a cylindrical auxiliary net located in the main net, the mesh size of the auxiliary net is smaller than the size of the feed particles, and M fan-shaped nets are arranged in the net sheet storage mechanism. The invention has the characteristics of effectively avoiding the waste of feed particles, ensuring that the feed particles are kept in a clean and hygienic state, and effectively improving the utilization rate of the feed.

The invention belongs to the technical field of special stratum well drilling and pile drilling construction processes, and particularly relates to a well completion process improvement method suitable for a water-saturated thick silty-fine sand layer. The well completion process improvement method comprises improvement of a well drilling mode, a drill bit structure of a circulating drill and chemical wall protection mud. The improvement of the well drilling mode comprises the steps that positive circulation and reverse circulation are combined for operation, that is, a positive circulation drilling machine is adopted for operation when upper-layer geology is drilled, and when the circulating drill bit of the drilling machine enters the silty-fine sand layer, a reverse circulation drillingmachine is used for operation; the improvement of the drill bit structure of the circulating drill is that the upper end of a fixing ring at the top of the drill bit is connected with a wall-protecting steel pipe consistent with the drill bit in outer diameter; and the chemical wall protection mud comprises corn starch, cellulose, sodium carbonate, polyacrylamide and a proper amount of water. Under the combined action of the three modes, the effects that the wall protection of a well wall is good, stable and free of collapse under special geological conditions, the wall protection mud is water-soluble after being over-aged, normal pore-forming wall protection is guaranteed, and the water permeability of a dewatering well is not affected are achieved.

The application relates to the field of building materials, and specifically discloses a high-strength permeable concrete and a preparation method thereof. High-strength permeable concrete includes the following components by weight: 200-240 parts of cement, 1300-1600 parts of coarse aggregate, 70-110 parts of mineral powder, 50-70 parts of fly ash, 8.5-25.2 parts of admixture, and 100-parts of water 125 parts, 5-10 parts of toughening fiber, 10-20 parts of reinforcing agent; The reinforcing agent described in every part by weight is made of raw materials comprising the following parts by weight: 5-6 parts of aluminum oxide, 1-1.25 parts of nano-titanium dioxide and 2 ‑2.5 parts of boron carbide; the high-strength permeable concrete of the present application has the advantages of large water permeability coefficient, high compressive strength and flexural strength, and strong heat resistance.