Gap automatic regulating apparatus

The invention relate to a device for automatically adjusting the clearance of a gear quenching machine tool. The device comprises a large cruciate slipway, a small cruciate slipway, a cylinder, two balancing springs, a guide rod and an inductor; the small cruciate slipway and the inductor are connected with the large cruciate slipway; the guide rod is connected with the small cruciate slipway; the relative position between the guide rod and the inductor is adjusted through the small cruciate slipway; and by action of two balancing springs and the cylinder, the clearance between the inductor and the tooth surface of a tooth socket is automatically adjusted. The automatic clearance adjusting device uses a mechanical device to substitute an expensive and complex automatic electric tracing system, has a simple structure, high precision, low cost, flexible and reliable action and convenient maintenance, reduces the labor intensity of manual operation by workers simultaneously and improves working ...

Diamond tool tyre case reinforcing apparatus employing alternating magnetic treatment

The invention belongs to the technology field of mechanical property improvement of a diamond tool tire body, relates particularly to an alternate magnetic enhancement device. A power supply unit and a magnetic pole unit connected to each other are respectively arranged on a supporting frame of the device from outside to inside. The magnetic pole unit generates alternating magnetic field, and thediamond tool tire body member is fixed to the alternating magnetic field via a fixture so that magnetic force lines always penetrate through to end surfaces of the diamond tool tire body vertically. The device improves mechanical property of diamond tool tire body structure via alternating magnetic treatment: i.e., improving density and uniformity of tire body tissue in diamond agglomerations, increases hardness of the diamond agglomerations, increases connecting tightness between diamond grains and peripheral tire body tissue, and increases holding capability to the diamond grain, thereby improving ...

Process of continuously preparing n-pentanal

Continuous terylene BCF (Bulk Continuous Filament) spinning machine

The invention discloses a continuous terylene BCF (Bulk Continuous Filament) spinning machine which belongs to the technical field of chemical fiber spinning equipment. The continuous terylene BCF spinning machine comprises a material dryer, a material absorbing device, a metering device, a material mixing hopper, a screw extruder, a diphenyl furnace, a spinneret plate with trilobal or Y-shaped spinneret micropores, a lateral air blowing device, a spinning channel and a tensile strain winder, wherein the tensile strain winder comprises primary tension devices, and each primary tension device comprises a feeding heat roller and two traction heat rollers; and the continuous terylene BCF spinning machine is characterized in that the material dryer comprises a feeding hopper, a crystallization bed, a drying tank and a storage hopper which are connected through material delivering pipes; the material mixing hopper is communicated with a nitrogen device or a steel nitrogen cylinder; the front ...

Treatment method of organic waste water

The invention discloses a treatment method of organic waste water. In the treatment method, a supported catalyst made of carbonyl metal is used, so that the chemical oxygen demands (COD) of various high-concentration organic waste waters can be effectively reduced under the mild condition; and the catalyst is convenient for separation and can be recycled, reaction condition is mild, and the treatment method is easy to operate.

Preparation of cellulose powder filter aid

The preparation includes successively material preparation, pulping, mixing with additives, dewatering, drying, grinding and sieving, and the additives includes three kinds of matter, i. e., water soluble inorganic salt(s) in the amount of 0.02-1.5 wt%, polyacrylamide in the amount of 0.005-0.2 wt%, and pH regulator. The cellulose powder filter aid of the present invention has penetration coefficient 1.5-4.5 times that of marketable lignocellulose, low content of harmful matter approaching or reaching the FCC standard and adjustable zeta potential of cellulolse surface, so that it may be usedwidely in the filtration of beer, beverage, oil and grease, water, petroleum, chemical, etc.

燃气发动机专用气门座的制造方法

The manufacture of air valve seat specially for gas combustion engine belongs to the field of metallurgy technology. The present invention features that the materials for the air valve seat consists of C 1.4-2.0 wt%, Si 1.5-2.4 wt%, Mn 0.5-0.9 wt%, Cr 16-23 wt%, Mo 3.0-4.2 wt%, Ni 1.2-1.6 wt%ú¼ B 0.5-1.4 wt% and V 0.5-0.9 wt% except Fe chemically and include cast iron, ferrochromium, ferromolybdenum, ferroboron, ferrovanadium, nickel block, ferromanganese, etc. and the manufacture process includes casting blank, heat treatment and machining. The air valve seat of the present invention has high hardness and high corrosion resistance, and the bench experiment for 200 hr and the road experiment for 16000 Km with LPG as fuel shows no corrosion. It is especially suitable for gas burning engine for motor bicycle.

Process for preparing citral by selective gas-phase oxidization of geraniol

A process for preparing citral by selective gas-phase oxidization of geraniol includes passing the gas mixture of geraniol, air and water vapour through the fixed bed using alkali metal and/or alkali-earth metal as co-catalyst and silver or silver-copper catalyst, quickly cooling to 50-80 deg, and coventionally collecting product. Its advantages include large specific surface area of catalyst simple process and high output rate.

Gap automatic regulating apparatus

The invention relate to a device for automatically adjusting the clearance of a gear quenching machine tool. The device comprises a large cruciate slipway, a small cruciate slipway, a cylinder, two balancing springs, a guide rod and an inductor; the small cruciate slipway and the inductor are connected with the large cruciate slipway; the guide rod is connected with the small cruciate slipway; the relative position between the guide rod and the inductor is adjusted through the small cruciate slipway; and by action of two balancing springs and the cylinder, the clearance between the inductor and the tooth surface of a tooth socket is automatically adjusted. The automatic clearance adjusting device uses a mechanical device to substitute an expensive and complex automatic electric tracing system, has a simple structure, high precision, low cost, flexible and reliable action and convenient maintenance, reduces the labor intensity of manual operation by workers simultaneously and improves working ...

Diamond tool tyre case reinforcing apparatus employing alternating magnetic treatment

The invention belongs to the technology field of mechanical property improvement of a diamond tool tire body, relates particularly to an alternate magnetic enhancement device. A power supply unit and a magnetic pole unit connected to each other are respectively arranged on a supporting frame of the device from outside to inside. The magnetic pole unit generates alternating magnetic field, and the diamond tool tire body member is fixed to the alternating magnetic field via a fixture so that magnetic force lines always penetrate through to end surfaces of the diamond tool tire body vertically. The device improves mechanical property of diamond tool tire body structure via alternating magnetic treatment: i.e., improving density and uniformity of tire body tissue in diamond agglomerations, increases hardness of the diamond agglomerations, increases connecting tightness between diamond grains and peripheral tire body tissue, and increases holding capability to the diamond grain, thereby improving ...

Underground polyethylene plastic ball valves and packaging method thereof

A PVC ball valve for underground pipelines consists of connecting seats, a basement, a body, a rod and a top for spanner. An inner chamber, both stop rings on a ball core, the basement and ball-sealing rings are made into a basement assembly, of which both slots for ball sealing rings are arranged on the both side ends. The side parts of the basement are embedded the inner walls of the stop rings to make ball-sealing rings fixed between the basement and stop rings. The outer walls of the basement are threaded into the body having the stop rings between the ball and the basement and making ball and ball-sealing rings contacted tightly. The side ends of the body and the basement are located in a same surface to connect with pipeline fixedly. The valve has good and easy sealing performance for gas or water supply plastic pipelines in cities.

Butadiene-silver epoxide catalyst

Method of preparing 2,5-dihydro furan

The present invention relates to an improved method for preparing 2,5-dihydrofuran by isomerization of vinyl epoxyethane in liquid phase. In the catalyst system formed from A and B, under the condition of reaction temperature of 50-200 deg.C the vinyl epoxyethane is isomerized into 2,5-dihydrofuran, in which the A is alkali metal and/or Lewis acid compound containing iodine and the B is an inert organic compound which can dissolve A and can be mixed with vinyl epoxyethane and be compatible with it. Said method can shorten reaction time, and can raise recovery and utilization rate of catalyst,and can improve space-time yield, and its product purity is up to above 98%, its space-time yield is 2.0-5.6g of 2,5-dihydrofuran/g of catalyst, hr.

Butadiene-silver epoxide catalyst

The present invention relates to butadiene-silver epoxide catalyst. It used aluminium oxide powder with proper grain size and ratio, adds silicone oxide and (or) titanium oxide and selects proper pore-forming material, adhesive, etc. through mixing, shaping, drying, and high temperature calcining to obtain calcined alpha aluminium oxide carrier with specific area 1-5 sq.m per gram, and porosity volume 0.4-0.6 ml./gm. Said carrier is impregnated with silver compound and alkali metal, alkali earth metal cocatalyst, and then dried and activated to obtain silver catalyst. When said catalyst is used in preparation of epoxybutene by selecting epoxidation, the butadiene conversion rate is 20-40%, epoxybutene selectivity is 90-97%, and at the same time, it shows very high stability.

Catalyst for treating organic wastewater and preparation method thereof

The invention discloses a catalyst for treating organic wastewater and a preparation method thereof. The catalyst is a metal carbonyl loaded catalyst, a precursor of the catalyst is one or a combination of ruthenium carbonyl and cobalt carbonyl, a second component Ce or Fe is added at the same time, and a carrier of the catalyst is selected from one or a compound oxide of active carbon, gamma-Al2O3 and TiO2. The catalyst can be used for oxidizing and degrading different organic matters with various concentrations in water under a milder condition so as to greatly reduce COD (Chemical Oxygen Demand) in wastewater and improve the removal efficiency of the COD in the wastewater.

Method for preparing cellulose powder filter aid

Process for preparing citral by selective gas phase oxidixarion of geraniol

Engine with automatic constant temperature device for inlet temperature

The invention relates to the field of engines, in particular to an engine with an automatic constant temperature device for inlet temperature. The engine comprises an engine body and a carburetor connected with the engine body via an air inlet venture, and a cavity in the venture is provided with an automatic constant temperature heating device for mixed gas. The engine has the advantage of simple structure and is convenient to install. According to the engine, the atomization effect of the mixed gas and fuel burning efficiency are improved, the engine is easier to ignite in winter, engine ignition time in winter is shortened, meanwhile, motorcycle oil consumption is lowered, the content of pollutants in tail gas is lowered, environment is protected, and the engine can be guaranteed to normally and stably work.