39results about How to "Blockage" patented technology

The invention discloses a blocking agent for drilling fluid and a preparation method thereof. The blocking agent for the drilling fluid is prepared from a thermosensitive deformation hydrophobic material, a thermosetting hydrophobic material, a rigid solid particle material, vegetable oil and solvent oil. The preparation method comprises the steps that the mixture of the thermosetting hydrophobic material and the plant oil is added into the cooled thermosensitive deformation hydrophobic material, sufficient stirring is carried out, the rigid solid particle material and the solvent oil are added, and then sufficient stirring is carried out. The blocking agent can effectively block various holes and microcracks with the diameters smaller than 20 micrometers, the permeability of the holes and the microcracks is lowered from 10<-5> md to 10<-6> and even 10<-7> md, and the filter loss is reduced; the blocking agent is easy to disperse and suspend in the drilling fluid without agglomeration or sedimentation, contains no emulsifying agent, can be used in drilling fluid in a water station, can also be used in drilling fluid in an oil station, and has the blocking and anti-sloughing acting effects. The preparation method is easy and convenient to implement, low in cost and applicable to industrial large-scale production.

The invention discloses a preparation method of a molecular sieve membrane, which comprises the following steps: carrying out cyclodextrin modification on a roasted ZSM-5 molecular sieve membrane, andcontinuing to synthesize a NaA molecular sieve layer on the roasted ZSM-5 molecular sieve membrane. According to the method, the separation effect of ZSM-5 containing defect holes can be improved, and the hydrophilicity of the whole molecular sieve membrane is improved under the action of the hydrophilic NaA molecular sieve layer, so that the water capacity is integrally improved.

The invention discloses an air pumping valve capable of preventing dust blockage. The air pumping valve capable of preventing the dust blockage comprises a pressing cap, a bolt, a movable rod, an air taking valve body, an ejecting rod and a rotation handle connected with the ejecting rod. The pressing cap is respectively connected with the bolt and the air taking valve, installation threads are arranged at the lower portion of the outer wall of the pressing cap, a bolt is provided with a through hole, the pressing cap is provided with an opening corresponding to the through hole, the movable rod is installed on the through hole and the opening and connected with the ejecting rod, a ventilation gap is arranged between the outer wall of the movable rod and the inner wall of the opening, the movable rod is provided with a flange, a first sealing ring is arranged between the flange and an inner cavity wall of the pressing cap, a spring is installed between the flange and the bolt, a ventilation groove is arranged on the movable rod, an air taking cavity communicated with an air taking pipe is arranged in the air taking valve body, and filter cotton is arranged at the lower end of the through hole. The air pumping valve capable of preventing the dust blockage is simple in structure, can prevent the dust from blocking a ventilation pipe through the filter cotton, enables the filter cotton to drop through the movable rod without damaging vacuum conditions after a sample is ground, and guarantees normal operation of air pumping.

The invention discloses a motor vehicle tail gas catalytic purifying device. The motor vehicle tail gas catalytic purifying device comprises a shell body and a catalyst carrier, wherein the shell body comprises a main body part, a gas inlet part and a gas outlet part, the gas inlet part and the gas outlet part are located on the two sides of the main body part, and the catalyst carrier is arranged in the main body part. The gas inlet part is internally provided with a gas guiding device. The gas guiding device comprises a deflector which is fixedly clamped in the gas inlet part, perpendicular to the gas inlet direction and provided with a plurality of gas guiding holes, and a gas flow stirring device which is fixed to the deflector. The gas flow stirring device comprises a driving device, a stirring rod and at least one pair of blades, wherein the driving device is fixedly arranged on the side, close to the gas inlet part, of the deflector; the stirring rod is connected with the driving device, penetrates through the deflector and extends to the side, away from the gas inlet part, of the deflector; and the blades are fixed to the end, away from the gas inlet part, of the stirring rod. According to the motor vehicle tail gas catalytic purifying device, through the combined action of the deflector and the gas flow stirring device, internal gas flowing is more uniform, and the time for internal gas to flow through the catalyst carrier is prolonged, so that catalytic reaction is more sufficient, thus, the conversion efficiency of the catalytic device is effectively improved, and the utilization rate of the catalytic device is effectively increased.

The invention provides a combined drainage device for steel ladle casting and relates to a drainage device for starting casting from a ladle nozzle. The combined drainage device is characterized in that a drainage plug comprises an upper sand cylinder, a lower sand cylinder, a fastening lath and an underneath drainage sand bag, wherein the upper sand cylinder is a round cylinder, and the diameter of the upper sand cylinder is larger than that of an upper opening of a nozzle; the lower sand cylinder is a cone-shaped basin, the diameter of the upper end of the lower sand cylinder is equal to the inner diameter of the upper opening of the nozzle, the lower sand cylinder is matched with a cone-shaped body of the nozzle, the diameters of flat sides of edge holes of the lower sand cylinder and the upper sand cylinder are the same, the upper sand cylinder is fixed on the lower sand cylinder, and drainage sand is arranged in the upper sand cylinder; the fastening lath is arranged at the lower part of the lower sand cylinder, the underneath drainage sand bag is filled into a cavity formed by the surrounding of the fastening lath, and the fastening lath is extruded to the inner wall of the nozzle. The combined drainage device has the advantages that the conception is novel, the manufacturing process is easy, and the manufacturing cost is low; the drainage sand is arranged in the underneath drainage sand bag and a cylinder formed by the upper sand cylinder and the lower sand cylinder, respectively, the mass transfer is little, and the combined drainage device is light, convenient and flexible; the drainage sand is filled into the nozzle, so that the molten steel is prevented from being solidified, the casting is benefited, the loss caused when the casting cannot be carried out is reduced, and the steel-making production is benefited.

The invention discloses a preparation method of a molecular sieve membrane, which comprises the following steps: carrying out cyclodextrin modification on a roasted ZSM-5 molecular sieve membrane, andcontinuing to synthesize a NaA molecular sieve layer on the roasted ZSM-5 molecular sieve membrane. According to the method, the separation effect of ZSM-5 containing defect holes can be improved, and the hydrophilicity of the whole molecular sieve membrane is improved under the action of the hydrophilic NaA molecular sieve layer, so that the water capacity is integrally improved.

The invention discloses a functional cosmetic additive, which comprises 3-5 parts of Coptis chinensis, 5-10 parts of Scutellaria baicalensis, 3-8 parts of Cortex Phellodendri, 2.5-7.5 parts of Dahuang, 2.5-7.5 parts of large thistle, 2.5-7.5 parts of small thistle, 5-5 parts of Shandougen 10. Mu Han Guo 3-8, water-flying Qingdai 3-6, peppermint 2-5, borneol 0.5-1.5 After preliminary crushing, mix with water, then ultra-finely pulverize to micron size under high pressure, and then pass Produced by membrane filtration. The entire prescription of additives is reasonably compatible according to the characteristics of traditional Chinese medicine, which can comprehensively treat the symptoms of skin allergies and ulcers caused by various reasons, and has good anti-allergic and anti-inflammatory effects. At the same time, in the preparation process, advanced ultra-fine grinding and membrane filtration technology are used to effectively prevent macromolecular substances such as dust and bacteria that can block the pores of skin cells from entering the additive, so the additive will not be gambled when it is added to cosmetics. Plugging pores can ensure that skin cells can breathe and absorb nutrients normally, without negative effects, and has a good anti-allergic effect.