73results about How to "Improve drainage performance" patented technology

The invention relates to a water-based fracturing fluid used for continental face shale gas fracturing and a preparation method thereof. The fracturing fluid comprises 0.02-0.1% of macromolecule polymer, 2-3% of clay stabilizer, 0.3-0.5% of discharge aiding agent, 0.1-0.3% of bactericide and the balance of water in mass percent. The preparation method of the fracturing fluid comprises the following steps of: 1) getting water in proportion in the formula of the fracturing fluid; 2) adding 0.02-0.1% of macromolecule polymer in mass percent, and stirring for 40 minutes; and 3) adding 2-3% of clay stabilizer in mass percent, and stirring for 10-15 minutes; and sequentially adding 0.1-0.3% of bactericide and 0.3-0.5% of discharge aiding agent in mass percent under a stirring condition, stirring for 15 minutes, and fully dissolving. The fracturing liquid provided by the invention can greatly reduce fracturing construction pump pressure and has the characteristics of low surface tension, good discharge aiding agent, strong clay stabilizing capability, strong sterilization capability and no precipitation or flocculate.

The invention discloses a foaming cleanup additive for a gas well. The foaming cleanup additive is composed of a surfactant, a foam stabilizing agent, an auxiliary agent and water. The preparation method comprises a step of uniformly mixing the surfactant, the foam stabilizing agent, the auxiliary agent and water so as to obtain the finished foaming cleanup additive. The foaming cleanup additive has excellent foaming performance, can produce abundant and stable foam and has moderate salt resistance; the foaming cleanup additive has surface tension of 21.11 mN / m and good cleanup performance and is beneficial for flowback of an operation fluid; and the foaming cleanup additive makes full use of all the raw materials, combines a foaming agent and a cleanup additive, realizes two purposes, reduces cost and is convenient to use on site.

The invention relates to an electronic atomization device which comprises a body and an atomization element. The body is provided with liquid storage cavities and an air suction channel; the atomization element comprises a porous body and a heating structure, the porous body comprises liquid suction faces, an atomization face and side faces, the liquid suction faces are used for sucking tobacco liquid from the liquid storage cavities, and the heating structure is located on the atomization face; an airflow channel is formed in the porous body, flows through the atomization face and is communicated with the air suction channel, and at least one section of the airflow channel extends to the interior of the porous body from the side face. Through the airflow channel section, on one hand, the sectional area of a heat transmission route from the atomization face to the liquid suction faces can be decreased, on the other hand, a large amount of heat transmitted from the atomization face to the liquid suction faces can be brought away, therefore, the heat transmitted from the atomization face to the liquid suction faces can be greatly reduced, the liquid guiding effect of the porous body is improved, and meanwhile energy waste can be avoided. Meanwhile, due to the fact that airflow can generate negative pressure, transmission of the tobacco liquid can be further sped up through the negative pressure.

The invention relates to an electronic cigarette, an atomization device thereof and an assembling method of the atomization device. The atomization device comprises an atomization component which comprises an atomization base, a heating piece and a liquid guiding piece. The atomization base comprises a cylindrical body which comprises an inserting end. An opening groove which is formed in the longitudinal direction and is communicated with the end face of the inserting end is formed in the side wall of the cylindrical body. The heating piece is in a cylinder shape and is arranged in the cylindrical body in the axial direction. An air flow channel is formed in the heating piece. The liquid guiding piece comprises a cylindrical liquid guiding body and at least one pair of splicing ends which are spliced in the peripheral direction. The liquid guiding body is arranged around the outer circle of the heating piece. At least one splicing end in each pair of splicing ends extends to the outer side of the cylindrical body from a corresponding opening groove. Through the splicing ends, tobacco liquid outside the cylindrical body can be adsorbed easily, liquid guiding performance is improved, meanwhile, the liquid guiding piece can be inserted into the cylindrical body through the liquid guiding body formed after liquid guiding raw materials wind the heating piece, the extending part of the liquid guiding body can be cut off afterwards, the splicing ends are formed, and assembling efficiency is improved.

The invention discloses a heat exchanger, comprising a first collecting pipe, a second collecting pipe, a flat pipe and a fin, wherein, the first collecting pipe is arranged vertically; the second collecting pipe is arranged in parallel with and opposite to the first collecting pipe and a preset distance is spaced out therebetween; the flat pipe is arranged between the first collecting pipe and the second collecting pipe horizontally and the two ends are respectively communicated with the first collecting pipe and the second collecting pipe; the fin is generally in a corrugated shape and is arranged between adjacent flat pipes; the fin comprises a straight line segment and a join segment which are connected in turn to ensure that the join segment forms a wave crest and a wave trough; the first end of the fin stretches out from one side of the flat pipe along the transverse direction; and the join segment in the first end part is removed. The heat exchanger in the invention can improvethe drainage performance, improve the surface heat exchanging of the heat exchanger and reduce the waste work of an air blower.

The invention relates to a foaming drainage aid and a preparation method thereof, and belongs to the technical field of oil and gas exploitation. The foaming drainage aid comprises the following components in percentage by mass: 5-15% of a cationic surfactant, 0-15% of a nonionic surfactant, 5-20% of an amine oxide amphoteric surfactant, 0.1-3% of a fluorocarbon surfactant, 0-20% of an auxiliary agent, 5-12% of a foam stabilizer and the balance of water. The foaming drainage aid has excellent foaming performance, good salt resistance and condensate resistance, and good stability in 25% hydrochloric acid; the synergistic effect between the surfactants is fully utilized, the drainage aid and the foaming agent are combined together, one single agent simultaneously has functions of foaming and assisting in drainage, the types of auxiliary agents are reduced, the risk of incompatibility among the single agents is reduced, and the foaming drainage aid has important significance for reducingthe cost and enhancing the effect.

A heavy-duty pneumatic tire designed to suppress the occurrence of heel-and-toe wear in the shoulder blocks while maintaining good drainage and traction performance through the final stage of the wear life. In this heavy-duty pneumatic tire, whose shoulder portion is divided into a plurality of shoulder blocks in the tire circumferential direction, and wherein the depth of the lug groove between each two adjacent of the shoulder blocks is set to be equal to the depth of main the grooves, a non-contact rib is provided, in a serial configuration in the tire circumferential direction, to a buttress portion outside a ground contact width, so as to come into contact with the side faces of the shoulder blocks in the state that the tire is in contact with the ground with a specified inflation pressure and a specified load.

The present invention relates to a low friction emulsifying acid liquid for fracturing acidification. The low friction emulsifying acid liquid comprises an oil phase and an acid phase according to a volume ratio of 30:70, wherein the oil phase comprises, by volume, 0.25-0.5 part of ODEA, 0.1-0.3 part of C18-alkyl primary amine, 0.2-0.6 part of n-caprylic acid, 1-3 parts of a friction reduction agent, and the balance of diesel fuel, and the acid phase comprises, by volume, 1-3 parts of an acid liquid multiple effect additive, 1-2 parts of a cleanup additive, and the balance of 28% concentrated hydrochloric acid. The emulsifying acid is a stable acid-in-oil emulsion at a room temperature, has characteristics of high viscosity, low friction, high retardance capacity and good cleanup capability, and is provided for achieving expansion of the acid fracturing treatment radius and improvement of the acid-etched fracture conductivity.

The invention provides a sand control technology for loose sandstone. Before sand control, by foam huff and negative-pressure mixed arrangement, the foam is used to discharge reservoir sand and clay particle fully, which are distributed unevenly near borehole zone; than high-pressure gravel is filled to sand control, even gravels are filled in the deficit stratum near borehole to improve the seepage behavior near borehole zone. The invention changes the seepage behavior of uneven stratum near borehole zone in basic, improves the well production rate, reduces the plugging near borehole zone by solid particles such as fine-silt sand, clay particle and so on in effect, and prolongs the valid period of sand control.

The invention relates to a heat exchanger for improving drainage performance, which comprises an upper collecting pipe, a lower collecting pipe and a plurality of flat pipes, wherein the flat pipes are vertically connected between the upper collecting pipe and the lower collecting pipe; a plurality of fins are arranged between the adjacent flat pipes; the fins are divided into permeable fins and watertight fins; the permeable fins form a plurality of permeable sections; the watertight fins form a plurality of watertight sections; and the permeable sections and the watertight sections are distributed at intervals. By distributing the watertight fins among the permeable fins at intervals, condensate water collected by the seam flushing fins at the watertight fins can be drained out of the heat exchanger, and the amount of the condensate water flowing through the permeable fins at the lower part is reduced. Meanwhile, by adopting the watertight fins with convex edges, the intercepted condensate water more favorably drops from the fins by the convex edges, and the fins at the lower part is not influenced. Furthermore, the fins are inclined relative to the windward side and are beneficial to the drainage of the condensate water, thereby improving the drainage performance of the heat exchanger so as to improve the heat exchange performance of the heat exchanger.

The invention provides a preparation method of an environmental-friendly demulsify-cleanup additive for fracture acidizing and is characterized in that the environmental-friendly demulsify-cleanup additive for fracture acidizing is prepared according to the following proportion in parts by weight (the unit is gram): 100 parts of environmental-friendly demulsify-cleanup additive for fracture acidizing comprise 20-25 parts of biological de-emulsifier SWP, 10-15 parts of alkyl polyglucosides, 20-30 parts of low-molecular alcohol and residual amount water. The environmental-friendly demulsify-cleanup additive for fracture acidizing belongs to pure green degradable substance, has no pollution to the environment, has the surface tension of 27.17 mN / m and the interfacial tension of 0.6640 mN / m and has better cleanup performance; the demulsification rate of the demulsify-cleanup additive is more than 90%, oil water emulsion can be radically demulsified and separated, and meanwhile, the demulsify-cleanup additive is multipurpose and can be conveniently added on site.

A motor controller, including: a control box including an inner wall; a circuit board; a dissipater; an IGBT module; and an insulating piece. The circuit board is disposed inside the controller box. The dissipater is disposed on the inner wall of the control box. The IGBT module is disposed on the dissipater and is in electric connection with the circuit board. The insulating piece is disposed between the dissipater and the controller and prevents the dissipater from contacting with the control box.

The invention relates to a municipal drainage ditch with a vegetation planting layer and relates to the technical field of municipal drainage. The municipal drainage ditch comprises a base layer, a municipal drainage pipe, a drainage well, a grid and a filtering net. One end of the filtering net is hinged to the inner side wall of the drainage well; an overflow hole is formed in the drainage well;an impounding reservoir is installed outside the drainage well; the impounding reservoir is located below the overflow hole; an effusion opening is formed in the drainage well; the other end of the filtering net abuts against the upper portion of the effusion opening and extends to the outside of the effusion opening; a driving cylinder is disposed in the base layer; a switch starting device is installed in the impounding reservoir and electrically connected with the driving cylinder; a filtered residue filtering cavity is formed in the base layer and located in the position, at the outer endof the drainage well, below the effusion opening; when the filtering net is opened, one end of the filtering net abuts against a port of the filtered residue filtering cavity; and the filtered residue filtering cavity is located above the municipal drainage pipe and communicates with the municipal drainage pipe. The municipal drainage ditch with the vegetation planting layer has the effects thatthe drainage property of the municipal drainage ditch is improved, and the phenomenon of blocking of an existing drainage ditch is reduced.

A pneumatic tire with good fuel efficiency, drainage performance and uneven wear resistance is provided. A pneumatic tire has a tread surface provided with circumferential main grooves to define a center region and two side regions. The center region is provided with a first circumferential narrow groove and second circumferential narrow grooves located between the first circumferential narrow groove and the circumferential main grooves; and center rib-like land portions including first center rib-like land portions defined by the first circumferential narrow groove and the second circumferential narrow grooves, and second center rib-like land portions defined by the second circumferential narrow grooves and the circumferential main grooves. The center rib-like land portions located next to each other with the center circumferential narrow grooves being therebetween are adapted to supportingly contact with each other. The second circumferential narrow groove has a width larger than that of the first circumferential narrow groove.

The invention discloses an atomizer with an integrated atomization assembly. The atomizer comprises a shell and the integrated atomization assembly, wherein the shell comprises a suction nozzle end and a connecting end, the suction nozzle end is provided with a suction port, the connecting end is provided with an opening, the shell is connected with a battery assembly through the connecting end toform electronic atomization equipment, and the integrated atomization assembly is mounted in the shell from the opening. The integrated atomization assembly comprises an atomization core base, an atomization core and a base from top to bottom, wherein the atomization core base is connected with the base, an upward-concave groove is formed in the lower portion of the atomization core base, the atomization core is mounted in the groove, the atomization core comprises an atomization core body used for absorbing atomization liquid and a heating resistor used for heating the atomization liquid, and the atomization core body is provided with an atomization channel. An air inlet cavity communicating with the atomization channel is further formed between the atomization core and the base, and thebase blocks the opening of the shell. The atomizer has the beneficial effects that during heating atomization, atomization is uniform, the atomization effect is good, scorched smell caused by scorching is not liable to generate, the structure is firm, deformation is avoided, and the phenomena of liquid leakage and gas leakage are avoided.

The invention relates to the technical field of flowerpot trays, in particular to a form-convertible flowerpot tray with an adjusting function. The flowerpot tray comprises a bottom plate, three supporting legs are mounted on the lower surface of the bottom plate, first sliding grooves are formed at the front, rear, left and right sides of the lower surface of the bottom plate, and first sliding blocks are mounted in the first sliding grooves; and a first limiting hole is formed at the top of each first sliding groove, a limiting rod is installed on the upper surface of each first sliding block, the limiting rods are located in the first limiting holes, a fixing frame is installed on the upper surfaces of the limiting rods, four telescopic rods are installed on the upper surface of the bottom plate, and a tray body is installed at the ends, away from the bottom plate, of the four telescopic rods. According to the flowerpot tray, through mutual cooperation of structures, water drainageis facilitated, the height of a flowerpot can be adjusted, the flowerpot tray can be changed into a hanging form, the practicability of the flowerpot tray is improved, people can use the flowerpot tray conveniently, and growth of plants in the flowerpot is facilitated.

The invention relates to a displacement agent, in particular to the displacement agent for plugging removal of an oil well. The displacement agent consists of 0.3 to 0.6 mass percent of fluorocarbon surfactant, 3 to 6 mass percent of acrylonitrile butadiene styrene (ABS), and the balance of water. The invention also provides a preparation method for the displacement agent, and the application of the displacement agent to the plugging removal of the oil well. The total effective rate of oil well plugging removal of the displacement agent is 90 percent, 10.6m<3> of liquid is increased to each single well every day, and 30 tons of oil is increased to each oil well every day; and the displacement agent has a good effect of plugging removal of the oil well.

The invention provides a compound filter pad, and a preparation method and application thereof. The compound filter pad comprises a polypropylene SMS nonwoven fabric surface layer, a water-absorbing fiber layer and a backing adhesive bottom layer, wherein a hot air flow guide layer is arranged between the polypropylene SMS nonwoven fabric surface layer and the water-absorbing fiber layer; the pore diameter of the polypropylene SMS nonwoven fabric surface layer is controlled at 16[mu]m or below; and the hot air flow guide layer is a composite material layer composed of synthetic fibers and cellulose. The preparation method comprises the following steps: performing spunbonding-melt blowing on polypropylene particles, and performing hydrophilic modification by means of an anionic surfactant to obtain the polypropylene SMS nonwoven fabric surface layer; and sequentially superimposing the polypropylene SMS nonwoven fabric surface layer, the hot air flow guide layer, the water-absorbing fiber layer and the backing adhesive bottom layer from top to bottom, and performing extrusion and compounding to obtain the compound filter pad. The compound filter pad provided by the embodiments of the invention is favorably applied to the aspect of a particulate fat purification process; and the formed compound filter pad is high in surface smoothness, causes less fat waste and achieves high oil absorption and water removal effects, thereby being very beneficial to wide popularization and application.

The invention discloses an atomizer with an integrated atomization assembly and a liquid storage tank type atomization core. The atomizer comprises an atomization shell; a suction port is formed in asuction nozzle end of the atomization shell and an opening is formed in a connecting end of the atomization shell; the integrated atomization assembly is arranged in the atomization shell from the opening; a mist suction channel is formed in the atomization shell in a downward extending mode from the suction port; the integrated atomization assembly comprises a liquid storage cavity sealing sleeve, an atomization core base and a base which are sequentially connected from top to bottom; a mounting cavity is formed in the lower end of the atomization core base; an atomization core sealing base and an atomization core are arranged in the mounting cavity; the atomization core comprises an atomization core body used for conducting atomization liquid and a heating resistor used for heating the atomization liquid; a downward-concave liquid storage groove is formed in the upper end face of the atomization core body; the base comprises an enclosure wall and a bottom plate; an atomization cavityis defined by the enclosure wall, the bottom plate, the atomization core base and the atomization core; and the opening of the atomization shell is blocked by the base. The atomizer has the advantages of being good in liquid guide effect, even in steam mist generated in the heating atomization process, firm in structure, free of deformation and not prone to liquid and gas leakage.

The invention provides a roadbed antifreezing and drained water interception facility and a construction method suitable for a seasonally frozen-ground region. The facility comprises macadam layers under a base layer, reversed filtering layers of the macadam layers, reversed filtering layers of drained water interception facilities, drained water interception layers, macadam filtering layers, insulating layers, plain soil layers and aboveground vegetation layers. The reversed filtering layers, the drained water interception layers, the macadam filtering layers, the insulating layers, the plain soil layers and the aboveground vegetation layers of the drained water interception facilities are arranged on the two sides of a road. During construction, grooves with certain run-off elevation are formed in the two sides of the road. The reversed filtering layers are laid at the bottoms and the side walls of the grooves. The drained water interception layers and the macadam layers are paved in the reversed filtering layers. The macadam layers are laid on the two sides of the roads. The three parts of macadam layers are connected. Water is gathered to the drained water interception layers. The insulating layers are laid on the side faces and top faces of the macadam layers on the two sides of the road. The upper portions of the insulating layers are backfilled with plain soil. Turf is planted on the surface layer. According to the roadbed antifreezing and drained water interception facility, drained water is gathered through the macadam layers and the drained water interception layers, the effect that the water in the drained water interception layers does not freeze and is drained out of the field is ensured by the insulating layers, and the effect that freeze-thaw damage does not occur to the roadbed during operation is ensured.

The invention relates to the field of oil and gas field fracturing liquid additive preparation, and discloses a discharge aiding agent for fracture acidizing, a manufacturing of the discharge aiding agent and a use method of the discharge aiding agent, and aims at solving the technical problem of environment pollution of the discharge aiding agent in the prior art. The discharge aiding agent is prepared from 8 percent to 12 percent of alkyl polyglucosides, 2 percent to 4 percent of fatty amine polyoxyethylene ether and the balance water through be metered in percentage by mass. The main ingredients of the discharge aiding agent are all green degradable substances, so that the technical effect of reducing the environment pollution is achieved.

The invention provides a micro-channel heat exchanger and an air conditioner. The micro-channel heat exchanger comprises an inlet tube, an outlet tube, a flow collection tube and a plurality of micro-channel tubes, wherein the inlet tube and the outlet tube form an inlet-outlet tube group; the plurality of micro-channel tubes are located between the flow collection tube and the inlet-outlet tube group; the micro-channel tubes connected with the inlet tube are arranged slantwise and downwards along a direction from the inlet tube to the flow collection tube; and the micro-channel tubes connected with the outlet tube are arranged slantwise and downwards along a direction from the flow collection tube to the outlet tube. The purpose of rapidly draining condensed water by the micro-channel heat exchanger is realized, the drainage performance is improved, and the heat exchange performance is enhanced, so as to further improve the energy efficiency of the air conditioner.

A pneumatic tire, having in a tread surface thereof a pair of circumferential grooves formed on respective sides of the tire equatorial plane in the middle, a rib-like central land portion row demarcated by the circumferential grooves, and a plurality of lateral grooves extending between the central land portion row and each tread end, comprises in each half region of the tread: a row of first intermediate blocks each having a circumferential length D2 and demarcated by the lateral grooves, the corresponding circumferential groove, and first longitudinal grooves; and a row of second intermediate blocks demarcated by the lateral grooves, the first longitudinal grooves, and second longitudinal grooves, wherein facing openings of the first / second longitudinal grooves adjacent in the tire circumferential direction are offset from each other, and provided that D1 represents a circumferential distance between adjacent ends of the adjacent first and second intermediate blocks, D1≦D2 / 2.

The invention discloses a method for intelligently facilitating discharging of accumulated water on a rain water well lid, and belongs to the technical field of urban road surface drainage. A ventilation system can be automatically controlled according to the circumstance of the accumulated water on the rain water well lid, so that when road surface rain water submerges and flows into the opening of the drainage well lid, free flowing-in is formed through a self-control device, and discharging of the road surface rain water is facilitated automatically; alternatively, when the road surface rain water submerges and flows into the opening of the drainage well lid, sucking-in negative pressure is formed automatically, and discharging of the rainwater is facilitated. The method has the advantages of achieving real-time performance, initiativeness, automation and intellectualization, being free of guarding, wide in usable range and convenient to maintain, and the like.

The invention discloses an atomizer with a central fog suction channel and an integrated atomization assembly. The atomizer comprises an atomization shell, wherein a suction port is formed in the suction nozzle end of the atomization shell, an opening is formed in a connecting end, the atomization shell is connected with a battery assembly through the connecting end to form electronic atomizationequipment, the atomizer further comprises the integrated atomization assembly, and the integrated atomization assembly is arranged in the atomization shell from the opening. The atomization shell extends downwards to be provided with the fog suction channel from the suction port, the fog suction channel is arranged in the center of the atomization shell, the integrated atomization assembly comprises a liquid storage chamber sealing sleeve, an atomization core base and a base which are sequentially connected from top to bottom, and a mounting groove which is concave upwards is formed in the lower end of the atomization core base; and n atomization core sealing sleeve and an upper section of an atomization core are mounted in the mounting groove, a base cavity is downwards formed in the upper end of the base, the lower section of the atomization core extends into a base cavity, and the base blocks an opening of the atomization shell. The atomizer has the advantages of being good in liquid guide effect, even in steam fog generated in the heating atomization process, firm in structure, free of deformation and not prone to liquid and gas leakage.

An anti-theft rain and snow preventive transparent insulating safety hood for a jointing clamp of a transformer comprises an upper cover and a lower cover. The rear of the upper cover is provided with a downward bent end, and the lower side of the rear end of the lower cover is provided with a lower bent plate corresponding to a front opening of the bent end. The upper cover and the lower cover are in butt joint to form a cavity matched with the external outline of the jointing clamp of a transformer sleeve, and the front end of the cavity and the bottom end of the bent end are provided with a through hole for a distribution line to pass through and a through hole for a transformer sleeve insulating bottle to pass through respectively. The joint edges of two sides of corresponding portions of the lower cover and the upper cover are provided with longitudinally-through connecting sides protruding outwards, and the connecting sides are provided with connecting holes and fastened by bolts. The anti-theft rain and snow preventive transparent insulating safety hood for the jointing clamp of the transformer has the advantages that recess portions between the front and the rear of each of the upper cover and the lower cover are eliminated, connection strength and tightness are greatly improved, and leakproofness is improved; and the integral structure is simplified, production and mounting are easier, material consumption is reduced, production efficiency and utilization convenience are improved, and production cost is saved.

The invention provides a heat exchanging pipe and an air conditioner. The heat exchanging pipe comprises a pipe body and a fin set arranged on the pipe body; the fin set comprises first fins and second fins; and first heat exchanging reinforcing structures are formed on the first fins, and the second fins are each of an unmachined fin structure. By applying the heat exchanging pipe, the first heatexchanging reinforcing structures are formed on the first fins, thus the heat exchanging area of the heat exchanging pipe can be increased, and the heat exchanging efficiency is improved; the secondfins are not machined and are kept smooth, thus it can be ensured that liquid conducting performance of the heat exchanging pipe is good, and the heat exchanging ability of a condensing pipe is improved advantageously; and in this way, the heat exchanging efficiency of the heat exchanging pipe can be considered on the basis of ensuring the liquid conducting performance of the heat exchanging pipe.

The invention belongs to the technical field of water conservancy projects, and particularly relates to an overflow dam with a flood discharge function for a water conservancy project. When the overflow dam is used and the upstream water level is full during the flood peak period, water blocked by the overflow dam can be completely released only by slowly lifting an inserting plate, when the inserting plate is lifted, the water flow at the bottom impacts on a first rotating wheel, at the moment, a rope winding wheel starts to wind a rope, then a lifting force is provided for the inserting plate, and the problem that the inserting plate is lifted in a more labor-saving mode is solved. According to the scheme, the overflow dam comprises a dam body, wherein the dam body is of a prism-shaped structure with a cavity; a notch is reserved in the middle of the dam body; T-shaped sliding grooves are formed in the opposite sides of the notch; and the same inserting plate with a flat cuboid structure with a cavity is connected between the two T-shaped sliding grooves in a sliding mode. The overflow dam is novel in structure, good in drainage smoothness performance and good in silt dischargingeffect, the high water level can be reduced in time, and the flood discharge capacity and speed are improved.

The invention relates to a water-based fracturing fluid used for continental face shale gas fracturing and a preparation method thereof. The fracturing fluid comprises 0.02-0.1% of macromolecule polymer, 2-3% of clay stabilizer, 0.3-0.5% of discharge aiding agent, 0.1-0.3% of bactericide and the balance of water in mass percent. The preparation method of the fracturing fluid comprises the following steps of: 1) getting water in proportion in the formula of the fracturing fluid; 2) adding 0.02-0.1% of macromolecule polymer in mass percent, and stirring for 40 minutes; and 3) adding 2-3% of clay stabilizer in mass percent, and stirring for 10-15 minutes; and sequentially adding 0.1-0.3% of bactericide and 0.3-0.5% of discharge aiding agent in mass percent under a stirring condition, stirring for 15 minutes, and fully dissolving. The fracturing liquid provided by the invention can greatly reduce fracturing construction pump pressure and has the characteristics of low surface tension, good discharge aiding agent, strong clay stabilizing capability, strong sterilization capability and no precipitation or flocculate.

The invention discloses an atomizer with a side mist suction channel and an integrated atomization assembly. The atomizer comprises an atomization shell; a suction port is formed in a suction nozzle end of the atomization shell, an opening is formed in a connecting end of the atomization shell, and the atomization shell is connected with a battery assembly through the connecting end to form electronic atomization equipment; the atomizer further comprises the integrated atomization assembly, and the integrated atomization assembly is arranged in the atomization shell from the opening; the mistsuction channel is arranged in the atomization shell in the mode of extending downwards from the suction port; the mist suction channel is arranged in one side of the inner wall of the atomization shell; the integrated atomization assembly comprises a liquid storage cavity sealing sleeve, an atomization core base and a base which are sequentially connected from top to bottom; an upwards-concave mounting groove is formed in the lower end of the atomization core base; an atomization core sealing seat and an upper section of the atomization core are mounted in the mounting groove; a base cavity is downwards formed in the upper end of the base; the lower section of the atomization core extends into the base cavity; and the base blocks the opening of the atomization shell. The atomizer has theadvantages of being good in liquid guide effect, even in steam mist generated in the heating atomization process, firm in structure, free of deformation and not prone to liquid and gas leakage.