84results about How to "Solving Corrosion Problems" patented technology

The invention relates to the technical field of sulfur-iodine circulating hydrogen production, in particular to a thermochemical iodine-sulfur-barium circulating hydrogen production process and a thermochemical iodine-sulfur-barium circulating hydrogen production system, which comprises the following steps: reacting excessive Ba < 2 + > with sulfuric acid in a Bunsen reaction product to obtain barium sulfate so as to obtain a first reaction mixed solution containing HI, BaSO4, H2O, BaI2 and a small amount of unreacted I2; sequentially carrying out cyclone separation, liquid removal and filter pressing to obtain a barium sulfate filter cake and a second mixed solution containing HI, H2O and BaI2; the method comprises the following steps: crushing a barium sulfate filter cake, performing high-temperature decomposition, returning gas generated by decomposition to participate in Bunsen reaction, and dissolving BaO generated by decomposition into Ba < 2 + >; and reboiling the second mixed solution to obtain hydrogen iodide steam, cooling a product obtained by decomposing the hydrogen iodide steam, carrying out gas-liquid separation to obtain hydrogen, and returning liquid obtained by gas-liquid separation to participate in the Bunsen reaction of the next cycle. Barium circulation is introduced, the process is simplified, the dosage of elemental iodine is reduced, and the cost is low.

The utility model provides a seamless splicing type aluminum ceiling moistureproof structure which comprises a ceiling body, the ceiling body comprises a substrate layer, a first functional layer and a second functional layer, the first functional layer comprises an epoxy resin coating and a polyurethane coating, the second functional layer comprises a fluorocarbon coating and a nanometer waterproof coating, and the nanometer waterproof coating is a polyurethane coating. By arranging the first functional layer comprising the epoxy resin coating and the polyurethane coating, the epoxy resin coating has excellent waterproof and moisture-proof performance, can effectively prevent water from permeating, further has good adhesive force and chemical corrosion resistance, and can protect the surface of the aluminum material from being damaged by oxidation and chemical corrosion; the epoxy resin coating is smooth in surface and easy to clean and maintain, and the polyurethane coating has excellent moisture-proof and waterproof performance, has elasticity and wear resistance, can adapt to thermal expansion and cold contraction changes of the aluminum ceiling body and is not prone to cracking and falling off.

The invention provides a water pan assembly, an air duct type indoor unit and an air duct machine, the water pan assembly at least comprises a first water pan and a second water pan, a supporting protrusion used for placing an evaporator is arranged in the first water pan, the supporting protrusion is in a shape with the middle higher than the two sides gradually lowered, and at least the supporting protrusion is provided with a drainage seam; the second water pan is used for supporting the first water pan and collecting condensate water dripping from the drainage seam; the evaporator can be placed at a high position, and meanwhile the problem that the evaporator is corroded due to being soaked by accumulated water is effectively solved.

The invention discloses a butt welding connection structure of a steel-plastic composite pipe and a connection method of the butt welding connection structure, relates to the technical field of composite pipe butt joint structures, and is mainly used for solving the problem that leakage risks exist in common steel-plastic composite pipe connection modes. According to the main structure, adjacent outer-layer steel pipes are connected in a butt welding mode through radial flaring sections which are arranged at the ends of the outer-layer steel pipes and are of an integrated structure with the outer-layer steel pipes; the end parts of the adjacent inner-layer plastic pipes are connected, a filler cavity is formed between the end parts of the adjacent inner-layer plastic pipes and the radial flaring sections which are in butt welding connection, and threaded holes communicated with the filler cavity are formed in the radial flaring sections. The invention provides a butt welding connection structure of a steel-plastic composite pipe and a connection method of the butt welding connection structure, which can ensure the loading capacity and the connection reliability of a connection part while completely preventing a medium in an inner-layer plastic pipe from being in contact with an outer-layer steel pipe, and increase the applicable working condition range of the product while avoiding the leakage of the medium.

The utility model discloses an assembly tool of a blanking cap, the assembly tool comprises a first installation rod and a second installation rod, one end of the first installation rod is provided with a first insertion end, and the first insertion end is suitable for being inserted into an assembly hole of the blanking cap so as to enable the blanking cap to be assembled into a process hole of a vehicle body; one end of the second mounting rod is provided with a second insertion end, the peripheral wall of the second mounting rod is provided with a pressing plate, the second insertion end is suitable for being inserted into the assembly hole, and the pressing plate is suitable for pressing and abutting against the blanking cap so that the blanking cap can be attached to the automobile body. According to the assembly tool, the first mounting rod and the second mounting rod are arranged, so that the problems that the blanking cap is difficult to assemble and not in place in the assembly process can be solved, the vehicle corrosion problem caused by water leakage and gas leakage is effectively prevented, and the NVH problem can also be effectively solved.

The utility model discloses a driving assembly for grinding and cleaning small parts, which belongs to the technical field of small part conveying and comprises a rotating shaft rotationally connected to the outer wall of a box. The rotating shaft is fixedly connected with a driving magnetic wheel; one end, close to the rotating shaft, of the conveying shaft extends out of the box body and is fixedly connected with a driven magnetic wheel; the driving assemblies such as the rotating shaft, the driving magnetic wheel and the driven magnetic wheel are designed on the outer side of the box body, so that during later maintenance, the driving assemblies do not need to enter the box body, a worker can perform maintenance directly on the outer side of the box body quickly and conveniently, meanwhile, the driving assemblies are designed on the outer side of the box body, and it is avoided that during grinding and cleaning, the grinding efficiency is greatly improved. Liquid is splashed to the surface of the driving assembly, the corrosion problem is avoided, and the working life is ensured.

The utility model provides a spraying and humidifying device of chemical supply equipment, which comprises a high-pressure spray head, a pure water inlet for feeding pure water, a nitrogen inlet for feeding high-pressure nitrogen and a water outlet for discharging excessive water, wherein the side surface of the high-pressure spray head is provided with a pure water inlet for feeding pure water, the side surface of the high-pressure spray head is provided with a nitrogen inlet for feeding high-pressure nitrogen, and the side surface of the high-pressure spray head is provided with a water outlet for discharging excessive water; a nozzle is formed in the top of the high-pressure spray head, an upper shell is arranged at the top of the high-pressure spray head, and a spray joint is arranged on the upper shell. The device improves the humidity control effect.

The application discloses a kind of laser cutting equipment and method for metal processing, including base, the outside of the base is provided with wheel rotation mechanism, the wheel rotation mechanism includes rotating roller, the shaft end of the rotating roller is connected with support plate, the outer surface of the support plate is fixedly connected with the outer surface of base, the outer camber surface of the rotating roller is opened with clamping groove at equal angle, the outer surface of the rotating roller is fixedly connected with telescopic link on both sides, the output end of telescopic link on both sides is fixedly connected with connecting plate, the body of the connecting plate is rotatably connected with two rotating rods, one end of one rotating rod is fixedly connected with circular platform, relate to cutting equipment technical field, solve the problem that actual processing efficiency is reduced, power consumption is increased when existing laser cutting equipment is used, since only single metal pipe can be carried during cutting process, metal pipe cannot be accurately blanked due to not being provided with guiding and buffering measures, and metal pipe cannot be avoided to be damaged by collision.

The embodiment of the invention discloses an earphone charging box control method and device, a charging box and a storage medium, and is used for controlling whether the charging box and an earphone are in a power-on state or not according to the state that the earphone enters and exits the charging box, so that the charging box cannot be in a power-on state for a long time, the power consumption of the charging box can be reduced, and the charging efficiency is improved. The problem of corrosion caused by long-term electrification of the charging box can be solved to a certain extent. The method is applied to the charging box. The method comprises the steps that the current magnetic induction intensity of the charging box is detected; according to a preset magnetic induction intensity threshold value and the current magnetic induction intensity, determining a charging box access state of the earphone; and controlling whether the charging box and the earphone are in a power-on state or not according to the state of the earphone entering and exiting the charging box.

The application discloses a water pan structure and a heat pump swimming pool equipment. The water pan structure comprises a first water pan, at least two limiting pieces and a fixing piece. The first water pan can be used for mounting two finned heat exchangers. Two limiting pieces are arranged on one side of the first water pan, and the two limiting pieces are respectively located at two end corners of the first water pan. The limiting pieces are used for limiting one side of end plates of the finned heat exchangers. The fixing piece is arranged on the other side of the first water pan, and the fixing piece is located on the center line of the first water pan. The fixing piece can be fixed with the other side of the end plates of the two finned heat exchangers. The application cancels the traditional positioning slot design, completely eliminates the condensate leakage channel caused by the slot gap, and can accurately position and fix the finned heat exchanger, thereby improving the assembly efficiency.

The invention provides an electrolyte and a secondary battery. The electrolyte comprises an organic solvent, a lithium salt, a film-forming additive and a metal corrosion inhibitor, the mass ratio of the metal corrosion inhibitor in the electrolyte is 0.001-2%; the metal corrosion inhibitor is a benzotriazole compound and / or a sulfonate compound; the chemical formula of the sulfonate compound is R-SO3M, R is C1-C16 straight-chain alkyl or phenyl-substituted C1-C12 straight-chain alkyl, and M is selected from any one of Li, Na and K. The invention further discloses a preparation method of the sulfonate compound. By adding the metal corrosion inhibitor according to the type and the mass ratio into the electrolyte, a protective layer can be formed on the surface of the steel shell of the cylindrical battery, so that the contact between acidic byproducts in the battery and the surface of the steel shell is isolated, the corrosion of the steel shell is inhibited, and the storage performance, the cycle life and the safety of the battery are further improved.

The invention relates to the technical field of hydrogen-resistant coatings, and provides a surface treatment method of a threaded connecting piece and the threaded connecting piece. The threaded connecting piece comprises a pipe body and a coupling which are matched with each other, and the surface treatment method comprises the steps that the pipe body and the coupling are placed into a tubular furnace, a hydrogen-resistant material is deposited on the thread surface of an internal thread of the coupling and the thread surface of an external thread of the pipe body, and the surfaces of the internal thread and the external thread are provided with hydrogen-resistant coatings; and depositing a self-lubricating material on the surface of the hydrogen-resistant coating to obtain the threaded connecting piece with the hydrogen-resistant self-lubricating composite coating. The hydrogen-resistant self-lubricating composite coating not only solves the problem of corrosion of a special threaded pipe in a hydrogen environment, but also effectively meets the requirements of thread gluing resistance and shaft sealing integrity, and the coating is low in production cost, high in controllability, suitable for industrial production and suitable for the working condition environment of an underground hydrogen storage library.

The utility model discloses mixing equipment for kitchen waste sludge treatment, which comprises a mixing tank fixed on a supporting table, a feeding pipe and a discharging mechanism are connected onto the mixing tank, an open groove is arranged at the top of the mixing tank, a top cover for sealing the mixing tank is mounted on the open groove in a lifting manner, and a fastening mechanism is arranged between the top cover and the mixing tank. A stirring mechanism and a heating mechanism are mounted at the bottom of the top cover, and a batching pipe is connected to the top cover. The effects of improving the mixing uniformity, ensuring the mixing quality and improving the operation safety and stability of equipment are achieved.

The invention discloses a ceramic coating marine cable connector, which comprises a connector shell, a conductive pin and an end cover, a composite protective coating system is arranged on the outer surface of the connector shell and the matching surface of the end cover, and a metal protective coating is arranged on the contact surface of the conductive pin. According to the ceramic coating marine cable connector and the preparation method thereof, the problem of galvanic corrosion of dissimilar metal is effectively solved through micro-arc oxidation / electronickelling differentiation bottom layer treatment, physical barrier and intelligent response cooperative protection is achieved through the graphene composite middle layer, a complete protection system is formed in combination with the super-hydrophobic top layer, and the corrosion resistance of the connector is improved. And finally, while the bonding strength of the coating is ensured, the corrosion-resistant life and maintainability of the connector in a marine environment are remarkably improved.

The invention provides a glass fiber reinforced plastic oil pipe connecting structure and a preparation method thereof.The method comprises the steps that 40-60 parts by mass of bisphenol A epoxy resin, 3-8 parts by mass of polyfunctionality epoxy, 2-5 parts by mass of epoxy diluent, 0.1-0.5 part by mass of coupling agent, 20-40 parts by mass of curing agent and 0.1-0.5 part by mass of accelerant are mixed, stirred and left to stand, and thermosetting resin mixed liquid is obtained; the fiber soaked with the thermosetting resin mixed liquid glue solution is wound on a core mold to be cured and formed to obtain the glass fiber reinforced plastic oil pipe connecting structure, the fiber is carbon fiber or aramid fiber with the modulus higher than that of glass fiber, and the core mold is set according to the size of the glass fiber reinforced plastic oil pipe connecting structure. The connecting structure is matched with the application of high well depth, high-temperature-resistant epoxy resin is used in a composite material, two resins with different epoxy equivalents ensure the toughness of the epoxy resin (the toughness is increased by high epoxy equivalents), the viscosity of the resin is reduced by the diluent, but no solvent exists. The final resin formula has good processability and good toughness, can be cured at medium and high temperatures, and has a long-term use temperature of 120 DEG C or above.

The invention relates to the technical field of production increase of low-permeability oil and gas fields, and particularly provides an organic alcohol suspension resistance reducing agent for production increase and capable of quickly discharging water and preventing emulsification during oil stripping and a preparation method. The invention aims to solve the problems of quick water discharge and oil stripping emulsification prevention in the technical field of low-permeability oil and gas field yield increase. The resistance reducing agent comprises polyacrylamide, polymethacrylamide, an organic alcohol solvent, nano silicon dioxide, a silane coupling agent, a zwitterionic fluorocarbon surfactant and an organic thixotropic agent. The preparation method comprises the following steps: preparing intermediates A1 and B1, and mixing to obtain the final product. The problem of blockage of reservoir pores in fracturing operation is solved, the flowback rate is increased, and meanwhile, crude oil emulsification is avoided, so that the oil extraction rate is increased, and the corrosion of gathering and transportation pipelines is reduced.

The utility model discloses a ball material separating device for discharging of a laboratory moxa sand mill, which is characterized in that a separating pipe and a ball filter are arranged, when the moxa sand mill is used for discharging, a ball discharging valve and a flushing valve are closed, a stop valve is opened, and slurry in the moxa sand mill sequentially enters a discharging pipe and the separating pipe; the ore grinding medium enters the ball filter through the upper half opening in the ball filter for ball-material separation, the ore grinding medium mixed with the slurry is left in the ball filter, and the slurry is discharged from an outlet through an overflow hole formed in the ball filter, so that the ore grinding medium is effectively prevented from being discharged along with the slurry.

This invention relates to the field of water pollution purification, specifically to a process for purifying and recycling industrial wastewater. The process provided by this invention induces the in-situ crystallization and precipitation of calcium and magnesium ions, primarily in the form of aragonite-type calcium carbonate, by adding a crystal form regulator to the wastewater. This replaces the traditional precipitation method using precipitants, fundamentally preventing the generation of secondary sludge. Simultaneously, a quencher regulates the type and concentration of active free radicals within the system, achieving targeted degradation of organic matter while maximizing the retention of beneficial ions in the water, ensuring the corrosion inhibition performance of the recycled water. This invention features a simple operation, requires no mechanical structural modifications, and can be directly adapted to existing industrial water treatment systems. It effectively solves the problem of simultaneously addressing hardness removal and organic matter degradation in circulating water wastewater treatment, significantly improving the purification and recycling efficiency of wastewater. The treated effluent can be directly reused in industrial circulating water systems.

The invention discloses a dehumidification system, relates to the field of bridge maintenance devices, and aims to improve the protection effect on a main cable and reduce the installation difficulty. The dehumidification system in the scheme comprises a main machine, air supply pipes and air inlet sealing covers, the main machine is communicated with the multiple air inlet sealing covers through the multiple air supply pipes, the main machine is used for being installed on a cross beam at the top of a bridge tower, and a cooler capable of generating dry air, a dehumidifier and a filter are arranged in the main machine. The air inlet sealing cover used for partially wrapping the main cable comprises two semicircular cylinders, and the two semicircular cylinders are in a circular tube shape after being encircled. According to the protection and dehumidification system for the main cable of the suspension bridge, the main cable is effectively protected, long-term stable operation of the system is ensured through a series of elaborately-designed key components and technical means, the safety of the bridge is improved, and the service life of the bridge is prolonged.

The present invention relates to a method for treating the effluent obtained from an oligomerization step in a vaporization step. In particular, the oligomerization step is a step of dimerizing ethylene to 1-butene using a nickel-based catalytic system.

The utility model discloses waste gas environmental pollution assessment and absorption equipment which comprises an absorption tower main body, a waste gas inlet, a purified gas outlet, a waste gas inlet and a purified gas outlet, the absorption guide pipe is connected to the gas inlet end of the waste gas inlet; the gas extraction mechanism is arranged in the middle of the absorption tower main body and is used for extracting waste gas; the detection units are sequentially arranged in the absorption tower main body along the airflow direction of the waste gas inlet; the filtering assembly is arranged at the bottom of the absorption tower main body and is used for purifying waste gas; the sampling unit is connected to the side wall of the absorption tower main body and used for extracting waste gas. According to the waste gas environmental pollution assessment and absorption equipment provided by the utility model, waste gas detection assessment and purification absorption functions are integrated in the same equipment. When the waste gas is purified, various pollutant indexes such as TVOC (Total Volatile Organic Compound), CO, CO2 and PM2.5 (Particulate Matter 2.5) can be monitored in real time by utilizing various sensors, so that the problem of single function of the traditional equipment is solved, and the treatment and monitoring are synchronously carried out.

The application provides a cyclododecatriene preparation reaction post-processing process and system, which comprises the following steps: a termination process, in which a termination agent is mixed with a CDT reaction solution to perform catalyst quenching, so as to obtain a first mixture; wherein the termination agent comprises an alcohol, a phenol or a mixed solution of the alcohol and the phenol; a first extraction process, in which lye is used to extract the first mixture after cooling operation, so that a first oil phase is obtained and input into a second extraction process; and the second extraction process, in which pure water is used to extract the first oil phase, so that a second oil phase is obtained and input into a subsequent rectification separation process to obtain a cyclododecatriene product with high purity. The catalyst inactivation effect of the process is good, the loss rate of the CDT product obtained after the subsequent rectification separation is reduced, and the product recovery rate is high; the CDT reaction solution treated by the process avoids the equipment corrosion problem in the subsequent process, can reduce the equipment investment cost, simultaneously reduces the solid content and ensures the stable and continuous operation of the device.

The invention discloses a continuous arsenic sulfide slag drying treatment system and method for corrosive waste gas filtration, and belongs to the technical field of hazardous waste treatment.The system comprises a box, and a closed feeding unit, a sectional type low-temperature drying unit and a discharging unit are arranged in the box; the sectional type low-temperature drying unit is circularly communicated with the corrosion protection unit and the heating air supply unit; the corrosion protection unit comprises a dry type filter unit, a wet type filter unit, a water condenser and a steam preheating recoverer, and is used for realizing graded purification, condensation dehumidification and heat energy recovery of corrosive waste gas; the heating air supply unit provides heated circulating air for the drying unit, and the sectional type low-temperature drying unit adopts a PVC + nylon anti-corrosion mesh belt and an ash removal scraping belt, so that closed drying and anti-scattering ash removal of materials are realized. According to the method, the whole-process closed drying of the arsenic sulfide slag is achieved, the weight reduction rate reaches 40% or above, the corrosive gas removal rate reaches 98% or above, the energy utilization rate is high, and the method is suitable for large-scale treatment of the arsenic sulfide slag in the non-ferrous metal smelting industry.

The application provides a deoxidizing agent suitable for medium and high pressure boilers and a preparation method thereof, wherein the deoxidizing agent contains the following raw materials in parts by weight: 20-40 parts of an organic reducing agent, 10-20 parts of an amino heterocyclic compound, 4-8 parts of a hydroxylamine compound, 2-8 parts of a dispersing agent, 3-6 parts of a neutralizing agent, 2-6 parts of modified sodium alginate, 1-3 parts of modified lignin and 20-40 parts of deionized water. The deoxidizing agent is high-temperature resistant, has outstanding dissolved oxygen removal capacity, is suitable for a medium and high pressure boiler water supply system, has a corrosion prevention effect, solves the corrosion problem of boilers, pipelines and heat exchangers, and is environmentally friendly, safe, almost non-toxic and harmless, and has a good market prospect.

This invention relates to the field of fluid measurement technology, specifically a crude oil water content measurement device and method based on a GRU neural network model. The device includes a longitudinal five-electrode array sensor, a front-end signal processing and measurement circuit module, a microprocessor control module, and a temperature monitoring module. The longitudinal five-electrode array sensor is connected to the front-end signal processing and measurement circuit module, which is connected to the microprocessor control module. The microprocessor control module is connected to the temperature monitoring module, which is connected to the longitudinal five-electrode array sensor. This invention uses a microprocessor control module as the main controller and combines it with various conversion circuits to complete the measurement of signal excitation, phase content, and related flow velocities. It features low energy consumption, strong anti-interference capability, and a high degree of automation.

The invention discloses a zinc hydrometallurgy replacement copper deposition continuous dechlorination system and method. The system comprises a dechlorination operation tank, a plate-and-frame filter press, a copper deposition operation tank and a thickener. The dechlorination operation tank, the plate-and-frame filter press, the copper deposition operation tank and the thickener are connected in sequence; and the thickener is also connected with the dechlorination operation tank. According to the method, the problems that Cl <-> in zinc hydrometallurgy is enriched for a long time and cannot be removed, and the corrosion of the Cl <-> to a zinc electrolysis anode plate and process equipment is aggravated can be solved, meanwhile, continuous dechlorination operation can be achieved, the self-produced copper slag is used as a dechlorination raw material, no new material is added, and new impurity elements are prevented from being brought into a system.

This invention discloses a corrosion-resistant water pump housing, comprising a pump housing, a button battery, a battery compartment, a current control module, and electrode strips. The pump housing has an outer surface and an internal cavity. The battery compartment holds at least one button battery. The current control module stably outputs current, driving the electrode strips to release electrons, forming cathodic protection and inhibiting corrosion on the pump housing surface. The battery compartment and sealing cover are designed to be waterproof, ensuring the battery and circuitry are protected from moisture or corrosive liquids. The current control module automatically adjusts the current output based on battery voltage changes, ensuring stable system operation. This invention, through stable current output and the cathodic protection of the electrode strips, effectively improves the corrosion resistance of the pump housing, extends the service life of the pump, and reduces maintenance frequency and costs.

The utility model discloses a nodular cast iron pipe interface thermal insulation structure for heating power, which comprises an inserting pipe and an adapting pipe, one end of the inserting pipe is provided with an inserting port, one end of the adapting pipe is provided with an adapting port, and the inserting port is inserted into the adapting port. The utility model relates to the technical field of heat preservation of a joint of a bulb tube structure, in particular to a heat preservation structure of a nodular cast iron pipe joint for heating power, which effectively reduces heat loss at the joint by winding and filling a flexible heat preservation layer in a reserved gap of the joint of an insertion port and a birdmouth and covering the joint with a second winding layer. The splicing opening limiting groove and the birdmouth limiting groove are formed, the limiting belt is embedded in the splicing opening limiting groove and the birdmouth limiting groove in a matched mode, and the outer layer protective sleeve tightly wraps the splicing opening limiting groove and the birdmouth limiting groove, so that the whole joint coating heat preservation structure can still keep stable when the pipeline stretches out and draws back or bears external force.

The utility model discloses a big section layering combination type direct current high -voltage cable, include: cable cover, the inside of cable cover is provided with cable conductor, the inner wall bonding of cable cover has waterproof cover, the inner wall bonding of waterproof cover has spiral copper wire cover, the inner wall bonding of spiral copper wire cover has galvanized steel band, the utility model relates to high -voltage cable technical field, this cable cover, through the setting of galvanized steel band spiral winding and spiral copper wire cover and filling cover, the mechanical strength of cable is enhanced significantly, makes cable can bear tension, pressure, distortion force and bending force, in the complex laying environment and long -term operation process, effectively resist the destruction of external force, maintain cable structure integrity, and waterproof cover is closely bonded in the inner wall of cable cover, constructs high -efficient waterproof barrier, prevents the moisture of outside from invading cable inside, avoids the insulation performance decline and metal part corrosion problem because of moisture.

The distributor assembly comprises a trumpet-shaped distributor body, a plurality of first connecting pipes are arranged at the large-caliber end of the distributor body, a plurality of first holes are evenly distributed in the end face of the large-caliber end of the distributor body along the circumference, and the first holes are all close to the edge of the large-caliber end of the distributor body; the first connecting pipes are mounted in the first holes in a one-to-one correspondence manner, and are welded by adopting a high-temperature vacuum brazing furnace after being mounted in the first holes in a one-to-one correspondence manner; the end, away from the distributor body, of each first connecting pipe is connected with a second connecting pipe. The small-caliber end of the distributor body is connected with a third connecting pipe, the end, away from the distributor body, of the third connecting pipe is connected with a filter, and the end, away from the third connecting pipe, of the filter is connected with a fourth connecting pipe. According to the invention, the manufacturing cost can be reduced, and the defects of unstable connection of part joints and leakage caused by easy corrosion in later use are improved.