85results about How to "Good blocking effect" patented technology

The invention discloses a fibre compound temporary plugging agent which comprises the following raw materials in parts by weight: 55-75 parts of transport fluid, 20-30 parts of temporary plugging agent grains and 0.5-2 parts of temporary plugging fibre. The transport fluid comprises the following raw materials in parts by weight: 0.2-0.6 part of guar gum, 0.1-0.5 part of sterilizing agent, 0.3-0.7 part of adhesive agent, 0.3-0.8 part of discharging agent and 0.1-0.5 part of sodium carbonate. The fibre capable of dissolving under certain conditions is added to the soluble temporary plugging agent grains. The fibre and the temporary plugging agent grains are used according to a certain proportion. The soluble fibre can form a space network structure which firmly bounds the temporary plugging grains to form an organic integrity, thereby greatly improving the intensity of the temporary plugging layer. The fibre compound temporary plugging agent has the advantages that the plugging effect is good and the plugging is easily and automatically unfastened after fracture and acidification with little hurt for the plugging layer. The success efficiency for working is obviously enhanced.

The invention discloses a plugging agent for a drilling fluid and protecting a low percolation reservoir, comprising the following components of: 10-40 parts of acid-soluble fiber, 5-10 parts of oil-soluble resin, 30-60 parts of acid-soluble deformed particles, 5-10 parts of high-temperature resistant natural small molecule materials and 10-15 parts of calcium carbonate. The basic component of the plugging agent is the acid-soluble fiber which is swelled and soft, has good tenacity and can expand by adsorbing partial moisture, and the like in the drilling fluid to form a meshy structure so as to form plugging on a hole throat under the action of flowing pressure. In addition, other components in the plugging agent, such as the deformed particles, the natural small molecule materials and the calcium carbonate can combine with the fiber to play a rapid plugging role, and therefore, the plugging agent has low damage depth on the reservoir. The plugging agent can be matched with the radius of the hole throat of the low percolation reservoir according to the regulation on the radius of the hole throat of a low percolation core. A drilling fluid system using the plugging agent as the main plugging material has the dynamic core filtration rate not more than 0.1ml/10min at high temperature and high pressure.

The present invention belongs to the field of microcapsule preparing technology. The high-hydroscopicity polymer resin microcapsule has wall material of hardened oil with smelting point higher than 40 deg.c and core material of acrylic acid and acrylamide polymer. The preparation process includes smelting the wall material, fluidizing the core material, air suspension spraying, solidifying and other stages. The present invention solves the problem of high-hydroscopicity polymer to absorb water to denature, makes it possess excellent flowability and prepares microcapsule with targeting release feature. The wrapping material separates the high-hydroscopicity matter from targeting release feature. The wrapping material separates the high-hydroscopicity matter from outer environment, and under certain environment condition, the core material may be released fast to absorb water and to expand. The said process of the present invention is suitable for forming microcapsule with solid core material, and is simple, practical, good in filming performance and homogeneous in embedding.

The invention relates to a green and environmentally friendly foam oil displacement system based on alkyl glycoside and a preparation method and application thereof and belongs to the field of chemical oil displacement for improving oil field crude oil recovery rate. The foam oil displacement system is obtained by using the alkyl glycoside as a main surfactant and compounding the surfactant with an anionic surfactant and a cationic surfactant. The alkyl glycoside surfactant adopted by the oil displacement system is from a natural source, is green and environmentally friendly, the average polymerization degree of sugar moieties is 1.0-3.0, and hydrophobic carbon chain length is 8-12. Other surfactants are industrialized produced fine chemicals, raw materials are easy to obtain, and preparation is simple. The foam oil displacement system has the properties of good temperature resistance and oil resistance, good dynamic foam stability, strong plugging effect, good salt resistance, ultralow interfacial tension and the like, has good compatibility with other oil-displacing agents, the effect of improving crude oil recovery rate is obvious, and the recovery rate of an indoor physical model oil displacement test can be improved by about 20%-26% OOIP.

The invention discloses a blocking agent kit for immunochromatography determination. The blocking agent kit comprises a kit body and a blocking agent arranged in the kit body. The blocking agent comprises a biological blocking agent and a chemical blocking agent. The biological blocking agent and the chemical blocking agent are separated to be arranged in the kit body. The invention further discloses a method for using the blocking agent kit. According to the blocking agent kit for immunochromatography determination, blocking effects of the biological blocking agent and the chemical blocking agent under endogenous interference factors of different concentrations are brought into full play, the influence on immunochromatography determination caused by the endogenous interference factors in a sample can be effectively prevented and controlled, accuracy of immunochromatography quantitative determination results is improved, and the blocking agent kit has better suitability.

The invention relates to expandable self-generated gas foam gel and a preparation method and application thereof. The expandable self-generated gas foam gel consists of the following components in percentage by mass in water: 0.4 to 0.6 weight percent of polyacrylamide, 0.4 to 0.6 weight percent of cross-linking agent Na2Cr2O7, 0.5 to 0.7 weight percent of cross-linking agent Na2SO3 and 1mol/L thermogenic agent NH4Cl and 1mol/L thermogenic agent NaNO2; the pH value of solution is regulated to 6.5-7 by hydrochloric acid, and the foam gel is formed at the temperature of 20-50DEG C. The foam gel has the best performance when the pH is 6.5-7, and the gel forming time is 20-90 hours and is controllable. The invention also provides application of the expandable self-generated gas foam gel, the foam gel has the characteristics of high underground volume expansion coefficient, high plugging performance and selective water plugging and can achieve multiple effects of treating edge-bottom water invasion, plugging and blocking.

The invention relates to the technical field of engineering blasting, in particular to a rock blast hole blocking device and a method for using the device to block a dry ice cracking rock blast hole.The rock blast hole blocking device comprises a blocking body, a plastic sleeve and a sleeve head, the blocking body is internally provided with a channel for a wire to penetrate through, and the channel is communicated with the upper and lower ends of the blocking body; the method for blocking the dry ice cracking rock blast hole comprises the following the steps that 1, the plastic sleeve is selected and sleeves the lower portion of the blocking body; 2, the wire penetrates into the channel and out of the lower end of the blocking body; 3, the rock blast hole blocking device is aligned withthe rock blast hole; 4, the rock blast hole blocking device is vertically fixed in the rock blast hole. According to the rock blast hole blocking device and the method for using the device to block the dry ice cracking rock blast hole, the friction force between the sleeve and the hole wall is increased so that the effect of blocking the rock blast hole by dry ice can be more significant, and theproblem that the blocking effect is poor is solved. Since the structure of the rock blast hole blocking device is simple, the blocking body is internally provided with the channel so that the wire canpenetrate into the blocking body, and the quality of dry ice rock breaking can be improved.

The invention relates to a nano film-embedded emulsion lubricant and mainly solves the problems about high frictional resistance of a horizontal well, serious backing pressure and poor lubricating effect of drilling fluid. The nano film-embedded emulsion lubricant comprises the following components in percentage by weight: 10 to 30 percent of modified paraffin, 3 to 11 percent of a compound emulsifier, 0.5 to 3 percent of an alkalinity modifier, 0.5 to 2 percent of nano graphite powder and the balance of water. The nano film-embedded emulsion lubricant provides an emulsion lubricant which has low fluorescence, is provided with a nano ball material and has capability of forming an anti-adhesion lubricating film between the stratum and a drilling tool; a prepared drilling fluid system has a good lubricating property; a mud cake is fine; the filter loss is low; the class of florescence is low; the nano film-embedded emulsion lubricant has excellent thermal stability and cold-resisting stability; drilling efficiency of the horizontal well is greatly improved.

The invention discloses a foam insulated pipe plugging device and plugging method. The plugging device structurally comprises an adjustor and a plugging device, wherein the adjustor is mainly a supporting plate which is sleeved on the outer wall of an inner pipe of an insulated pipe and leans against the end portion of an opening of an outer pipe, and two side faces of the supporting plate are respectively provided with an outer pipe adjusting bolt and an inner pipe adjusting bolt which are respectively used for pressing and adjusting in a welding mode. The plugging device mainly comprises the supporting plate, a pressing plate, a pressing bolt and a seal rubber pipe, wherein the plugging device is tightly sleeved between the inner pipe and the outer pipe. The foam insulated pipe plugging device plays a seal function on polyurethane foam materials, meanwhile can adjust concentricity of the inner pipe and the outer pipe, and is good in plugging effect, convenient to assemble and disassemble, capable of greatly reducing labor intensity of workers, and capable of effectively improving product quality and labor efficiency.

The invention relates to the field of drilling fluid leaking stoppage and discloses a gel particle plugging agent and a preparation method and application thereof. The gel particle plugging agent is of a nucleus-shell structure, the nucleus is made from gel particles, and the shell is made from thermoplastic resin; the gel particles are prepared through a reaction of a nonionic monomer, a crosslinking agent, an initiator, alginate, filling particles and water. The gel particle plugging agent has excellent high temperature resistance and has an excellent blocking effect on the high-temperaturedropping stratum.

The invention discloses an environment-friendly type welding device for mechanical accessory machining. An upper transverse plate and a fixed plate are included; first electric telescopic rods are welded and connected to the positions around the left and right of the lower surface of the upper transverse plate; a clamping device is connected to the position below the upper transverse plate in a penetrating manner; a traction rope is fixedly connected to the front side of a connection block; the right side of the traction rope is coiled on a connection disk; an accessory body is further included, and is located on the inner side of the lower end of the clamping device; a control board is connected to the upper end of a bottom plate in a clamped manner; a fixed box is further included, and is fixedly installed at the lower end of the bottom plate; and an air blower is fixedly installed on the right side of a treatment box, and the upper end of the air blower is located in a collecting groove. The environment-friendly type welding device for mechanical accessory machining can be used for well treating medical dust and toxic gas, and can also play a very good shielding role in arc light radiation, and facilitates fast clamping and accurate positioning on the accessory body.

The invention relates to a collection device, in particular to an ideological and political education data file collection device, and aims to provide an ideological and political education data filecollection device which can reasonably arrange and classify data and files of ideological and political subjects. In order to solve the technical problem, the ideological and political education datafile collection device comprises a placement box and the like. An adjusting mechanism is arranged in the placement box, and a classification mechanism is arranged at the top of the placement box. Thedata and the files of the ideological and political subjects can be reasonably arranged and classified, the whole placement box can be flexibly used by the aid of the adjusting mechanism and a movableplate, the data can be completely placed, a sleeve plate is matched with a telescopic plate, so that books and the data can be prevented from falling into slotted holes, an excellent baffling function can be achieved, the data can be picked and placed according to the content of a writing board by the aid of the classification mechanism, and the device is conveniently used by users.

The invention discloses a heat treatment method for obtaining a high-toughness and high-damage-tolerance double-phase titanium alloy. The heat treatment method comprises the following steps of high-temperature annealing treatment, specifically, keeping the temperature for 0.1-2 hours at T1 temperature, reasonably controlling the cooling speed, preferably, controlling the temperature range from T1 to T-200 DEG C to be 2-50 DEG C/s, controlling the value range of T1 between Tbeta10 DEG C and T, controlling the value range of T between Tbeta10 DEG C and T, controlling the value range of T between Tbeta10 DEG C and T, wherein T is the beta transformation temperature of the double-phase titanium alloy. According to the method, the toughness and the damage tolerance performance of the double-phase titanium alloy are improved by controlling the heat treatment temperature and the cooling speed. The method can be used for the two-phase titanium alloy with two structures under the room temperature conditions of TC11, TA15, TC4, TC17, TC18 and the like, is not limited by the original manufacturing process of the titanium alloy, and is suitable for forge pieces, castings, welding pieces and additive manufacturing pieces of the two-phase titanium alloy.

The invention relates to a surface protection technology for steel fastener materials, in particular to a steel fastener material double-layer protection method using surface blackening and an organiccoating. The method comprises the steps: performing degreasing and rust removal on a fastener, then immersing the fastener in a blackening liquid for 10-20 minutes so as to form an oxide film layer,performing water washing, and then applying organic paint so as to form the organic coating. The problems that current electroplating, electroless plating, organic coating and other surface protectionmethods have complicated and harsh pretreatment, thick coatings, serious pollution and common anti-corrosion performance are solved. The surface treatment technology which adopts double protection ofblackening treatment and the organic coating has thin coatings, a simple process and low cost, no complicated pretreatment is required, and the neutral salt spray corrosion resistance of the coatingis improved to a large extent on the premise of ensuring excellent adhesion between the coating and a substrate.

The invention discloses an oil-based drilling fluid blocking agent and a preparation method thereof. The oil-based drilling fluid blocking agent is prepared from a solid state mixture being 60 to 150meshes prepared by compounding oil-containing plant residue materials containing rich plant fiber and auxiliary materials accounting for 0.2 to 1 percent of the oil-containing plant residue materials,wherein the oil-containing plant residue materials are residue left after the grease removal from the oil-containing plant; the auxiliary materials are at least one kind of materials from calcium carbonate powder, magnesium stearate powder, talcum powder, superfine silica powder and calcium hydrophosphate powder with the mesh number being smaller than or equal to 60 meshes. The blocking agent isobtained through proportionally mixing the oil-containing plant residue materials and then performing drying, crushing, grinding and sieving. The preparation method is simple; the raw materials can beeasily obtained; the cost is low. The oil-based drilling fluid blocking agent has the characteristics of water absorption and oil absorption expansion, deformation capability, degradability, oleophilic performance and easy dispersion; the influence on the viscosity of the drilling fluid is small; waste materials can be reused; the cost is low; the environment is protected.

The invention discloses a photomask with a novel three-layer-film structure, and a preparation method thereof. The photomask with the novel three-layer-film structure comprises a glass substrate, a barrier layer, a shading film layer, and an antireflection film layer. At least one layer in the three layers of films comprises a carbon component. According to the preparation method, one or more Cr target materials are provided; with a vacuum magnetron sputtering method, the barrier layer, the shading film layer, and the antireflection film layer are respectively plated on the glass substrate. With the method provided by the invention, a recess problem caused by sodium ion diffusion can be solved. Compared with a three-layer-film structure in prior art, the photomask with the novel three-layer-film structure can ensure etching time and good etching speed. Also, only one Cr target material is needed to be provided during the preparation process.

Relating to the field of oilfield development, the invention discloses an acidizing blocking remover, a preparation method thereof and a blockage removing method applying the same. The acidizing blocking remover comprises a component A, a component B, a component C and a component D. Specifically, the component A includes hydrochloric acid, xylene and water; the component B includes a mud acid/organic acid system; the component C includes additives, a composition capable of producing hydrofluoric acid and water; and the component D includes hydrochloric acid and water. The construction processincludes: step 1: injecting a pre-flushing liquid with a mass concentration of 2-5% into a water injection well; step 2: squeezing the component A into the stratum at a displacement of 1-1.5 cubic meter/min; step 3: reducing the displacement, and squeezing the component B into the stratum at a displacement of 1-1.2 cubic meter/min; step 4: squeezing the component C into the stratum at a displacement of 1-1.5 cubic meter/min; and step 5: adding the component D into the well. Combination of the whole components can achieve a good treatment effect on mixed plugging of old wells, and the acidizing blocking remover is suitable for wells with a deep blocking section, a large blockage removing radius and a large blocking remover dosage.

The invention relates to a preparation method of a polymerization chelating water-soluble fertilizer. The preparation method is characterized in that a conventional chelating agent and white carbon black are subjected to soaking treatment, so that the chelating efficiency of the chelating agent on nutrition ions is improved; a fertilizer is predissolved, and is uniformly mixed with the pretreated white carbon black so that the chelation is sufficient; an acrylamide solution is added; an acrylamide polymerization process is used; in the process of forming polyacrylamide by acrylamide polymerization, various nutritional ingredients in the fertilizer are polymerized into white carbon black particles; and spray drying is performed to obtain solid powder type small particles, and the particles are the polymerization chelating water-soluble fertilizer. The fertilizer has the advantages of good water dispersibility and excellent slow-release performance, and the fertilizer efficiency loss can be effectively prevented.

The invention provides an internal network IP address protection method based on ARP response, comprising the steps as follows: 1) a monitoring host computer starts a network monitoring program and loads an IP address management strategy; 2) when an online host computer appears on line, the online host computer sends a broadcast packet, meanwhile, timing is started and response is waited for; 3) after the monitoring host computer monitors the broadcast packet, the monitoring host computer judges whether the online host computer legally uses the IP address or not according to the IP address management strategy; if so, the monitoring is continued; if not, the step 4) is turned to; 4) the monitoring host computer sends a simulation response packet to the online host computer; 5) if the online host computer receives the response packet under a condition of no waiting overtime, the IP address fails to be started; if the online host computer waits overtime and receives no response packet, the online host computer starts the IP address successfully. The method can complete the interdiction only by one response packet under normal condition, the interdicted computer can not gain corresponding IP, the interdiction effect is extremely good, and additional network flow is not caused.

The invention provides an epitaxial structure of an ultraviolet light emitting diode capable of effectively improving the light output power and luminous efficiency and a preparation method thereof. The epitaxial structure of the ultraviolet light emitting diode is characterized by orderly comprising the following substances from bottom to up: a substrate, an AlN nucleating layer, a u-type GaN buffer layer, a first n-type AlGaN layer, a heavily-doped n-type GaN layer, a second n-type AlGaN layer, a lightly-doped n-type GaN layer, an InGaN/AlGaN superlattice layer, an InGaN/AlInGaN active layer, a p-type AlInGaN layer, a p-type AlInGaN/InGaN superlattice layer, a p-type GaN layer, and a heavily-doped p-type GaN layer, wherein the thickness of the first n-type AlGaN layer is 60 to 100nm, and the thickness of the second n-type AlGaN layer is 20 to 50nm.

The invention discloses a ceramic superconducting high-pressure rotary cutting blockage removal device, and belongs to the technical field of thermal power plant coal conveying. The blockage removal device comprises a gas storage tank, a gas conveying pipe, a PLC control cabinet and a plurality of ceramic nozzle sets; gas is sprayed downwards into a stock bin from ceramic nozzles through the gas conveying pipe, materials on the wall of the stock bin is impacted by kinetic energy generated by high-pressure air, thus, the materials are scattered, loosened and disengaged from the wall of the stock bin to move downwards, and accordingly, the stock bin blockage problem is solved. The ceramic superconducting high-pressure rotary cutting blockage removal device has the technical characteristics that the shape structure of an original coal bin is not changed, only a small hole is formed in the wall of the coal bin, and then, the blockage removal device can be fixed to the outer wall of the coal bin and is suitable for stock bins of various shapes; and the structure is simple, installation and maintenance are convenient, and the blockage removal effect is good.

The invention discloses a PE pipe opening blocking device. The PE pipe opening blocking device comprises a PE pipe body, a branch pipe, a first flange, an air pipe, a control valve, a bolt, a second flange, a nut, a sealing air bag, a sealing ring, a sealing plug, a threaded hole, a first through hole and a second through hole, wherein the branch pipe is welded to the middle of the PE pipe body; the first flange is arranged at the upper end of the branch pipe; the second flange is arranged above the first flange; the air pipe is arranged in the middle of the second flange; the bolt is arrangedabove the second through hole; the bottom end of the bolt is connected with the nut; and the lower end of the air pipe is connected with the sealing air bag. The PE pipe opening blocking device is provided with the first flange and the second flange, the first flange is fixedly connected with the second flange through the bolt, by threaded sealed connection between the sealing plug and the threaded hole, a good blocking effect is achieved under the condition that the branch pipe is not used, by arrangement of the sealing air bag, the blocking effect is further improved, and tight blocking isimplemented.

The invention provides a blast hole plugging device for large-hole statically crushed rock. The blast hole plugging device comprises an upper part used for shading a blast hole and a lower part which extends into the blast hole, multiple safety pin holes which penetrate through the upper part and the lower part are formed in the upper part and the lower part in the axial direction of the upper part and the lower part, and safety pins are inserted into the safety pin holes; and multiple firing pin cavities used for containing firing pins are formed in the lower portion in the radial direction of the lower part, a firing pin spring is arranged on the outer wall of each firing pin in a winding manner, and one end of each safety pin extends into the corresponding firing pin cavity to abut against the extending end of the corresponding firing pin and compress the corresponding firing pin spring. The blast hole plugging device is easy and convenient to operate and good in plugging effect, and therefore safety in the process of conducting large-hole static blasting is guaranteed.

The invention provides an anti-puncture and wear-resistant safety shoe sole and a preparation method thereof. The formula comprises the following components in parts by weight: 20-30 parts of composite fibers, 100 parts of polycarbonate polyol, 1.5-2 parts of a catalyst, 0.6-1.2 parts of a foam stabilizer, 0.5-1 part of a foaming agent, 0.05 part of a foaming aid, 6-8 parts of an anti-wear agent,100 parts of isocyanate, 1-1.5 parts of a chain extender and 10-15 parts of anti-puncture glue. The composite fibers are uniformly dispersed in the polyurethane matrix to form a high-strength fiber net, and when the shoe sole is impacted by an external impaling force, the fiber net plays a good role in impeding, so that the anti-impaling performance of the shoe sole is enhanced; the wear-resistantagent enhances the wear resistance of the sole; the puncture-proof rubber enhances the high temperature resistance and the electric shock resistance of the sole, so that the comprehensive safety performance of the safety shoe is improved.

The invention relates to the field of daily chemicals and discloses moisturizing and moistening salicylic acid shower gel. The moisturizing and moistening salicylic acid shower gel is prepared from the following components in percentage by mass: 0.01-2% of salicylic acid, 0.01-20% of anionic surfactant, 0.5-10% of amphoteric surfactant, 0.05-5% of nonionic surfactant, 0.01-2% of anti-allergy component, 0.5-10% of humectant, 0.05-5% of greasing agent and the balance of pure water complemented to 100%. According to the moisturizing and moistening salicylic acid shower gel, through the application of the salicylic acid, a shower gel system structure is reasonably constructed and key parameters of the raw materials are limited, so that the use amount of the surfactant of the shower gel is small, the irritation is low, the pore blockage alleviating effect is obvious, the moisturizing and moistening effects are achieved, and then good use experience is further provided for consumers.

The invention discloses a drainage manhole cover. The technical scheme of the drainage manhole cover is characterized in that when a vehicle passes by the manhole cover, a driving post at the center of the manhole cover is driven to move vertically; at the time, a blockage clearing sleeve pipe move vertically at the same time through a fixed connection rod; a blockage clearing knife is arranged on the inner side of the blockage clearing sleeve pipe, and the blockage clearing knife extends into the inner side of a drainage pipe to move vertically through a blockage clearing groove in the drainage pipe, so that junk in the drainage pipe can be crushed; the structure of the blockage clearing knife is arranged, so that the blockage clearing knife can conveniently move in the drainage pipe, and meanwhile, a good crushing effect is provided; and furthermore, a swinging mechanism is arranged, and thus the drainage pipe can horizontally swing, so that the junk can be crushed more easily, and the aim of anti-blocking is reached. By adopting the drainage manhole cover, the problem of a current manhole cover that a drainage hole is blocked and needs to be cleared manually is solved; automatic clearing is realized; and water can be drained more rapidly in a rainy season.

The invention discloses a laying hen breeding device for animal husbandry. The device comprises a box body, fixing rods distributed at equal intervals are arranged on the inner walls of the top and the bottom of the box body, a metal net is arranged on the inner wall of one side of the box body, the metal net is obliquely arranged, and a supporting frame is arranged on the inner wall of one side of the box body; and a storage box is arranged on the outer wall of one side of the supporting frame, and partition plates are arranged on the inner walls of the top and the bottom of the storage box.In the laying hen breeding process, excrement generated by laying hens can fall on the outer wall of the top of a conveying belt body through the metal net, the excrement can be intercepted together through a connecting plate and a first scraper in the rotating process of a conveying belt, the excrement can be conveniently scraped into an excrement collecting box through a second scraper subsequently, and the excrement is prevented from staying in the box body for a long time, so that normal growth and development of the laying hens are not affected. Meanwhile, the metal net is obliquely arranged, so that a good exercising effect can be achieved on the laying hens when the laying hens eat the feed.

The invention discloses a rushing-proof water conservancy dam. The rushing-proof water conservancy dam comprises a water drainage plate, wherein the water drainage plate is located on the lower surface of a breast wall; water drainage holes corresponding to the breast wall are formed in the water drainage plate; the left and right heights of the breast wall are inconsistent; the upper surface of the middle part of the breast wall is in a convex structure, and a vegetation layer is arranged at a convex part; gravel cushion layers are arranged at the parts, close to the two sides, of the breast wall; water seepage pipes are vertically mounted on the gravel cushion layers; the water seepage pipes correspond to the water drainage holes; fences are vertically mounted at the parts, close to the two sides, of the lower surface of the water drainage plate; the tops of the fences penetrate through the water drainage plate and extend into the breast wall to be fixedly connected with the breast wall; transverse reinforcing ribs and longitudinal reinforcing ribs are arranged in the fences respectively; and no less than one transverse reinforcing rib and no less than one longitudinal reinforcing rib are arranged. The rushing-proof water conservancy dam provided by the invention can bear the gravity relatively well and has a good stopping effect; the stress performance can be effectively improved, and loss of water and soil is reduced by using the effect of vegetation; and meanwhile, a lot of construction materials can be reduced, and dam construction cost is reduced.

The invention discloses a mask device for urologic surgical operation. The device includes a base, two support plates are fixedly installed on the top of the base, A slide plate is slidably mounted onboth support plates, both skateboards are located above the base, and a connecting plate is fixedly installed on the top of the two sliding plates, both support plates are located between the two connecting plates, the two connecting plates are fixedly mounted on one side close to each other with the same mounting plate positioned above the supporting plate, A first rotating electric machine is fixedly installed at the bottom of the mounting plate, a lead screw is fixedly installed on the output shaft of the first rotating electric machine, the lead screw is positioned between two supportingplates, a same fixing plate is fixedly installed on one side of the two supporting plates close to each other, and the lead screw is threadably connected with the fixing plate. The invention is convenient for adjusting the shielding cloth, and is convenient for unfolding the shielding cloth, and is convenient for shielding the patient, and has good shielding effect, and is convenient for moving the shielding cloth, and the shielding cloth can be stably placed after being moved.

The invention discloses a renewable packing filter cartridge applied to nitrogen and phosphorus interception in farmland ecological ditches. The filter cartridge housing is provided with a gate A, a middle grille, a gate B, a filter screen A, a gate D and a filter from the water inlet to the water outlet. The activated carbon adsorption layer is arranged between the screen B and the gate C, and the activated carbon adsorption layer is arranged between the filter screen B and the gate C; the top of the filter cartridge shell is provided with a water distribution system and water quality testing equipment. The flushing spray pipe A and the backwashing spray pipe B are respectively connected to the pressurized water pump; the bottom of the filter cartridge shell is provided with a circulation system composed of four water collection pipes, and the regenerated waste water is discharged through the four water collection pipes and collected into two pipelines , one pipeline directly returns to the ecological ditch, and the other pipeline returns to the farmland through the lift pump. The invention not only improves the interception efficiency of nitrogen and phosphorus by the ecological ditch, but also solves the problem of easy blockage caused by the laying of fillers, and also effectively removes larger suspended substances and odors in the water body of the ecological ditch.