Instrument checking device case

The invention discloses an instrument checking device case which comprises a case body. Pull rods are arranged on the side face of the case body, and a plurality of wiring ports are formed in the side face of the case body. Idler wheels are arranged at the bottom of the case body. A top plate of the case body is connected with the case body in a rotating mode. A lower cover is arranged at the bottom of one side of the case body. Anti-collision materials are arranged on the four prisms of the vertical direction of the case body. By the adoption of the instrument checking device case, the wiring ports of an instrument checking device are formed in the side face instead of the bottom in the past, wiring holes are formed in the case body, in this way, when checking is carried out each time, the instrument checking device does not need to be lifted out, time and labor are saved, and instruments are prevented from being abraded; the pull rods are arranged on the side face of the case body, lockable ...

Visual oil displacement device for simulating oil fields with different permeability and test method

The invention discloses a visual oil displacement device for simulating oil fields with different permeability and a test method, and belongs to the technical field of oil displacement. The device comprises a visual sand filling device, a constant-temperature water conveying device, a pressure driving device, a partial pressure water inlet pipeline and a bottom plate, wherein the visual sand filling device comprises a sand filling cavity and a water circulating device; the sand filling cavities are a plurality of connected spherical cavities; the sand filling cavity is formed in the water circulation device, and the multiple sets of visual sand filling devices are arranged on the bottom plate. A water outlet of the constant-temperature water delivery device is communicated with a water inlet of the water circulation device, and a water outlet of the water circulation device is communicated with a water inlet of the constant-temperature water delivery device; the pressure driving device ...

Insecticide composed of methyl-parathion, phoxim and pyrethrins and its application

Preparation for asbestos or non-asbestos emulsoid wet board

A process for preparing the paper-making asbestos (or non asbestos)-latex plate includes such steps as dispersing the asbestos (or non asbestos) fibres by stirring, pulping, adding calcium carbonate or attapulgite powder and carbon black, stirring, adding latex, sulfurizing agent and antiageing agent, stirring, adding silane coupling agent, silane cross-linking agent or titanate coupling agent, stirring, shaping and drying. Its advantage is high strength.

Multi-sulfonic-group anti-flocculation humic acid as well as preparation method and application thereof

The preparation method comprises the following steps: mixing and dissolving triethanolamine, phosphorus trichloride and a solvent, adding a catalyst, adding a mixed solution of humic acid and the solvent, carrying out heating reaction, carrying out rotary evaporation to remove the solvent, washing with hot water, standing, filtering, and carrying out vacuum drying to obtain the multi-sulfonic-group anti-flocculation humic acid. The triethanolamine modified humic acid is obtained; and dissolving triethanolamine modified humic acid in a solvent, slowly dropwise adding a sulfonating agent at low temperature, carrying out rotary evaporation to remove the solvent after the reaction is finished, and carrying out water washing, centrifugation and vacuum drying to obtain the multi-sulfonic-group anti-flocculation type humic acid. The triethanolamine is used for modifying humic acid, the content of carboxyl around humic acid molecules is reduced, meanwhile, sulfonation sites are increased, high-hydrophilicity ...

Technology for preparing high-purity phosphoric acid

A process for preparing high-purity phosphoric acid in reagent grade features use of 50-60% cheap phosphoric acid as raw material and includes such steps as removing As, filtering removing hydrogen sulfide and oxidization decolouring. Its advantages include saving raw material, high quality of product and no environmental pollution.

Application of bacillus amyloliquefaciens strain B014 in postharvest preservation of fruits and vegetables

The invention discloses application of a bacillus amyloliquefaciens strain B014 in postharvest preservation of fruits and vegetables. The application comprises the following steps that the seed solution of the strain B014 is inoculated into a large number of fermentation media according to the volume ratio of 5.0 percent, and 180 rpm fermental cultivation is carried out; after fermentation is completed, fermentation broth is centrifuged, and sediment is collected; biological preservation inoculant is obtained after resuspending of the sediment; the biological preservation inoculant is sprayed to the picked fruits and vegetables, and preservation is achieved. The character of the strain B014 for generating ACC ammonialyase is utilized in biological preservation, the application of microbial resources in biological fresh-keeping agent development is expanded, and a new way is provided for overcoming the defect that chemical fresh-keeping agents have few varieties and have potential virulence ...

Bone stretching dental implant

The invention relates to the field of an oral cavity medical appliance and discloses a bone stretching dental implant. The bone stretching dental implant is characterized by comprising a fixed sieve and a conveying sieve, wherein the conveying sieve and the fixed sieve are respectively provided with a cylindrical cavity provided with an internal thread along the center longitudinal axis, the cavity contains a coupling screw and a fixed screw or stretching screw, the height ratio of the fixed sieve to the conveying sieve is (1:4)-(1:3), the diameter of the cylindrical cavity of the fixed sieveis smaller than that of the cylindrical cavity of the conveying sieve, and the bottom of the fixed sieve is of an enclosed structure.

Environmental response type ampholytic surfactant and preparation method thereof

The invention discloses an environmental response type ampholytic surfactant and a preparation method thereof, and belongs to the technical field of surfactants. The preparation method comprises the following steps: uniformly stirring alkyl chain diamine, acrylate and methanol, carrying out a double-bond addition reaction, and carrying out post-treatment after the double-bond addition is completed, so as to obtain an intermediate product I; and uniformly stirring the intermediate product I, chloroacetic acid and acetone, carrying out substitution reaction, adjusting the pH value after the substitution reaction is finished to obtain a reaction solution, and carrying out vacuum concentration and vacuum drying to constant weight to obtain the environment-responsive ampholytic surfactant. The environment response type ampholytic surfactant prepared by the preparation method can realize corresponding change of surface activity according to the change of pH and temperature of the environment, ...

Benzyl alcohol modified humic acid as well as preparation method and application thereof

The invention provides benzyl alcohol modified humic acid as well as a preparation method and application thereof, and belongs to the technical field of oil displacement of oil fields. The preparation method comprises the following steps: mixing humic acid and deionized water to obtain a mixture I, heating the mixture I to an oxidation reaction temperature, adding acidic KMnO4, keeping the temperature, carrying out an oxidation reaction, and after the oxidation reaction is finished, washing, centrifuging and freeze-drying to obtain oxidized humic acid; mixing the oxidized humic acid with a solvent to obtain a mixed solution; the preparation method comprises the following steps: mixing benzyl alcohol, phosphorus trichloride and a solvent, adding a catalyst, adding the mixed solution, heating, carrying out a reaction, and carrying out rotary evaporation, washing, standing, filtering and drying after the reaction is finished, so as to obtain the benzyl alcohol modified humic acid. According ...

高效除垢剂

The present invention provides a cleaning agent with stronger descaling and detersive power, which is characterized by that it is made up by using dilute nitric acid or dilute hydrochloric acid and adding anti-corrosion agent ABA, and mixing them. Said invention has no corrosivity, and is safe and reliable.