34results about How to "Difficult to contact directly" patented technology

The invention discloses a thin-wall lightweight meter cable for oil-gas engineering. The thin-wall lightweight meter cable comprises a cable core and a sheath layer coating the outer side of the cablecore, wherein the sheath layer is prepared from the raw materials in parts by weight: 60-80 parts of ethylene propylene terpolymer rubber, 40-50 parts of polyurethane rubber, 50-60 parts of nitrile silicone rubber, 6-10 parts of vulcanizer, 40-50 parts of vermiculite powder, 20-30 parts of precipitated barium sulfate, 60-70 parts of channel carbon black, 4-8 parts of octyl phenolic aldehyde tackifying resin, 40-50 parts of carbon fibers, 4-8 parts of propylene glycol polysebacate, 2-4 parts of modified soybean oil and 3-5 parts of anti-aging agent.

The invention relates to a method for preparing a key intermediate 4-methyl-5-ethoxazole of vitamin B6 and belongs to the technical field of crude drug preparation. The method for preparing 4-methyl-5-ethoxazole comprises the steps that firstly, 4-methyl-5-ethyoxyl-1,3-oxazole-2-nonanoic acid-ethyl ester, methylbenzene, drinking water and sodium hydroxide are sequentially put into a hydrolysis reaction still according to a certain proportion, and stirring, heat preservation and reacting are carried out; liquid separation is carried out, and the pH value of the water phase is adjusted to rangefrom 1.0 to 2.5; an organic solvent is added to the system obtained in the second step, reacting is carried out by controlling the temperature ranging from 30 DEG C to 50 DEG C until no carbon dioxideis generated; after decarboxylation is finished, the pH value is adjusted to be larger than or equal to 9.0, liquid separation is carried out, the organic phase is subjected to vacuum distillation, and 4-methyl-5-ethoxazole is obtained. The process is easy and safe to operate, and industrial production is easy.

The invention discloses a fishhook production process for improving the surface brightness of a fishhook. The fishhook production process comprises the following steps that S1, the fishhook to be treated is pretreated; S2, the fishhook is subjected to nickel plating; S3, the fishhook obtained after nickel plating is electroplated with metal elements with the brightening effect; and S4, the fishhook is plated with colored paint in an electrophoresis mode. A colored paint layer obtained in the electrophoresis mode is uniform in thickness, uniform in paint covering and high in light reflecting capacity, the color of the fishhook is bright, and the strength performance of the obtained fishhook is good.

The invention discloses a quick electric heating faucet in order to overcome the defects that an electric heating element of an existing electric heating faucet directly makes contact with water flow and accordingly the safety hidden hazard of electric leakage exists in the use process, the water flow heating effect is not good, and power consumption is large. The quick electric faucet comprises a connection body on the upper portion and a heating body on the lower portion. The connection body is provided with a switch lever and a water pipe connector. A heating mechanism is connected to the side wall of the heating body and comprises a heating pipe, an air guide pipe and an electric heating pipe. The electric heating pipe is installed in the vertical heating pipe, the lower end of the air guide pipe is connected to the upper end of the heating pipe, the upper end of the air guide pipe is communicated with the heating body, and the air guide pipe is obliquely arranged towards the heating body from bottom to top. A water flow refining mechanism is disposed between the connection body and the heating body. A water outlet is formed in the lower end of the heating body. Water flow flowing out of a water outlet of the faucet of the structure is not likely to make direct contact with the heating mechanism, so that absolute insulation is achieved, the electric leakage risk is small, the water flow heating effect is good, temperature can be raised quickly, and power consumption is low.

The invention discloses an instrument signal cable for controlling a computer. The instrument signal cable comprises a cable core and a jacket layer covering the outer side of the cable core; the jacket layer is prepared from the following raw materials in parts by weight: 100 to 110 parts of main materials, 1.5 to 2.5 parts of tert-butyl hydroperoxide, 2 to 4 parts of lauric acid, 1 to 2 parts oftetramethyl thiuram disulfide, 20 to 30 parts of heavy calcium carbonate, 15 to 25 parts of talcum powder, 45 to 55 parts of expanded perlite, 2 to 4 parts of melamine resin, 35 to 45 parts of cottonand linen fiber, 3 to 7 parts of plasticizer, 2 to 4 parts of antioxidant 1010, 1 to 2 parts of ultraviolet absorbent UVP-327, and 0.5 to 1.5 parts of light stabilizer GW-540. The instrument signal cable for controlling the computer is good in bend resistance and pulling resistance, high in tear strength, capable of preventing the direct contact between oxygen or vapour and a carbon chain, capable of effectively improving the hot oxygen stability and the aging resistance, and long in service life.

The invention discloses a plant ecological building curtain wall for a bottom-layer building, and belongs to the field of ecological building curtain walls. According to the scheme, gas generated through pheromone volatilization can be discharged to the position of landscape plants along an insect inlet channel, insects in the landscape plants are attracted to crawl to the position where an insect catching bottle is located through pheromone, at the moment, under the action of the self gravity of the insects and a counter weight part, rubber fan blades easily deform downwards as shown in a figure 8, part of the insects easily fall off from gaps among the multiple rubber fan blades and fall on the pheromone, and kinetic energy generated by falling directly penetrates through the pheromone and a bearing net and falls into distilled water, so that the insects are captured; part of insects open wings to fly in the falling process, do not directly fall to the upper side of the pheromone but slowly fall, but when the insects want to leave the insect catching bottle, the insects are difficult to jack up the rubber fan blades by means of own force, and the insects are difficult to escape from the insect catching bottle.

The invention discloses a preparation method of a hollow fiber membrane based on PTFE. The system comprises a fixed rack, and a controller is fixedly connected to the middle position of the top of the outer wall of the right side of the fixed rack. A driving body is arranged in the middle of the right side of the top of the fixed rack, and blocking frames are fixedly connected to the positions, located on the two sides of the driving body, of the top of the fixed rack. A processing device is arranged in the middle of the left side of the top of the fixed rack, and the top of the processing device communicates with a feeding pipe. The invention relates to the technical field of hollow fiber membranes. According to the preparation method of the hollow fiber membrane based on the PTFE, the auxiliary shell is tightly connected with the isolation cylinder, so that the sealing performance of the device is effectively improved; and the compression mechanism and the processing mechanism can be communicated through the arrangement of the transition piece, so that the precision of internal transmission is guaranteed, and the problems that the raw materials are adhered to the interior of the device during transmission, and the shell is not easy to clean are avoided; meanwhile, tension degree of fiber membrane collection is convenient to adjust, and the problems that the cut line of fiber membranes are uneven is avoided.

The invention relates to a connecting structure for a marble pillar trim strip and furniture. The connecting structure for the marble pillar trim strip and the furniture comprises a plate type pillar body assembled to furniture to be connected; two grooves with circular-arc-shaped parallel sections are formed in the left and right sides of an inner surface of a pillar body; the radian of each groove is greater than 180 degrees; the connecting structure further comprises inserting parts which are in inserting march with the grooves; the inserting parts are arranged on the furniture to be connected and the inserting part corresponding to each groove is arranged on one straight line; each inserting part comprises a strip-shaped base plate; two surrounding elastic clamping sections are symmetrically arranged at the left and right ends of each strip-shaped base plate; a certain distance is formed between free ends of the two elastic clamping sections; a mounting hole is formed in the middle of each strip-shaped base plate; the inserting parts are assembled on the furniture by the mounting holes; the inserting parts are arranged into the grooves in an interference inserting manner. By adopting the connecting structure, the furniture can be connected by inserting and damages to the previous furniture are avoided; the furniture is convenient and rapid to mount and replace.