USE OF SEAWEED POLYSACCHARIDES FOR REPLACING ANTIBIOTICS IN DAILY RATION OF WEANED PIGLET

The disclosure discloses use of seaweed polysaccharides for replacing antibiotics in daily ration of weaned piglets, and belongs to the technical field of pig breeding. According to the use of the disclosure, the adding amount of the seaweed polysaccharides in the daily ration of the weaned piglets is 400 mg/kg, and the content of polysaccharide in the seaweed polysaccharides is 30%. Based on the conditions that the growth performance of the piglets is not influenced, even daily gain of the piglets can be improved remarkably, and piglet diarrhea frequency and feed-gain ratio are reduced remarkably, the use can alleviate the stress reaction of the piglets caused by weaning, promote the intestinal structural development and gut immunity of the weaned pigs, and play a role in replacing the antibiotics completely. -1/1 Duodenum Jejunum Ileum FIG. 1

Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments

The invention provides a method for recycling waste rigid polyurethane foam plastics and waste spandex filaments. The method comprises the following steps: 1, respectively crushing waste rigid polyurethane foam plastics and waste spandex filaments to obtain polyurethane foam particles and short spandex filaments; 2, mixing raw materials to obtain a mixture at room temperature, and pre-pressing the mixture, wherein the raw materials comprise the polyurethane foam particles, the short spandex filaments, an adhesive and water; and 3, carrying out hot press molding on the pre-pressed mixture obtained in step 2 to prepare a polyurethane composite material. The method has the advantages of simple process, low cost, simultaneous recycling of the waste rigid polyurethane foam plastics and the waste spandex filaments, waste use benefiting and environmental protection benefiting. The polyurethane composite prepared by adopting the method has the advantages of no formaldehyde, good flame retardation ...

Duplex spiral gear direct forming process

The invention discloses a duplex spiral gear direct forming process. The direct forming process of the duplex spiral gear comprises the following steps that firstly, powder is prepared, wherein carbon powder, copper powder, nickel powder and iron powder are stirred into mixed powder according to the proportion; 2, green body pressing, wherein the mixed powder is pressed into a green body of the duplex spiral gear through a forming die and a pressing machine; the green body in the second step is put into a high-temperature sintering furnace for high-temperature sintering, the sintering temperature is 1120 DEG C, the sintering time is 3.5 h, and the sintering speed is 120 mm/min; and step 4, inspection. The problems that in the prior art, a duplex spiral gear is long in production period and high in manufacturing cost, and the product quality cannot be guaranteed are solved.

Rigid foam polyurethane fireproof, insulation and decorative plate and production method thereof

The invention relates to a rigid foam polyurethane fireproof, insulation and decorative plate and a production method. The rigid foam polyurethane fireproof, insulation and decorative plate comprises a rigid foam polyurethane plate body and a decorative fireproof material applied to at least part of the surface of the rigid foam polyurethane plate body. The rigid foam polyurethane plate body is made from polyisocyanate, polyol, a catalyst, a fire retardant, a foaming agent and a foam stabilizer. The decorative fireproof material comprises resin, a solvent, a catalyst, a carbon-forming agent, a foaming agent, a fire retardant and padding. The rigid foam polyurethane fireproof, insulation and decorative plate produced through the production method has the advantages of being low in density, uniform in distribution, high in compressive strength and good in dimensional stability, fire resistance and decoration and is applicable to the fields, such as the internal and external wall insulation ...

Light steel powder gas atomization preparation process and device

The light steel powder gas atomization preparation technology comprises a workbench, the surface of the workbench is fixedly sleeved with a sleeve, the opposite ends of connecting rods are fixedly connected with a discharging barrel, a cleaning mechanism is arranged between the sleeve and the discharging barrel, a smelting mechanism is arranged at the top of the sleeve, and an atomization mechanism is arranged in an inner cavity of the sleeve. The invention relates to the technical field of metal powder preparation. According to the light steel powder gas atomization preparation technology and device, the problems that due to the fact that the impact force is large, broken metal liquid drops splash, a small amount of metal liquid drops make contact with the inner wall of equipment under the condition that the metal liquid drops are not cooled, the metal liquid drops adhere to the inner wall along with rapid cooling, cleaning cannot be conducted, and the service life of the equipment is ...

Biological fermented bran and processing method thereof

The invention discloses biological fermented bran and a production method, which belong to the technical field of biological fermentation. Wheat bran is used as a raw material, lactobacillus liquid is added, the material-liquid ratio is regulated to be 1:0.5 to 1:1.5, the mixture is fermented at the temperature of 25 to 50 DEG C for 2 to 3 days, and the fermented mixture is dried and pulverized to obtain the solid fermented bran. By adopting the solid fermentation, the process is simple, and the cost is low. The final product, fermented bran, is golden yellow, and is rich in lactic acid, probiotics and small peptide and thick in fragrance, the antioxidant capacity of the fermented bran is greatly improved compared with that of the raw material, no phytic acid or main mycotoxin can be detected after the fermentation, and the biological fermented bran is safe animal feed which can promote the ingestion of animals and improve the animal immunity and is easily digested.

Intelligent air-conditioner systems

An intelligent air conditioner system is disclosed. The environmental temp distribution and the position where there is human body's temp signal are detected by infrared. According to the measured data the conditioned air is transmitted to said position or in whole environmental temp distribution. The air conditioner can be automatically turned on or off according to that whether there is human body's temp signal or not.

Electric hammer bearing support

The utility model discloses an electric hammer bearing support which comprises a seat body, a center hole used for installing a bearing is formed in the center of the seat body, a hole seat facilitating installation of a fastener is arranged on the periphery of the seat body, the hole seat is arranged close to one end of the seat body, a gap is reserved between the hole seat and the end of the seat body, and a first groove is longitudinally formed in the position, connected with the hole seat, of the seat body. A second groove is longitudinally formed in the outer circumferential face of the base body, the second groove is larger than the first groove, and an inner flange is longitudinally arranged at the position, located in the second groove, of the inner surface of the base body. The utility model has the advantages that the structural strength is improved, and the roundness after sintering is ensured.

Preparation method of environment-friendly PU (polyurethane) ceiling with flame retardant and sound absorption functions

The invention discloses a preparation method of an environment-friendly PU (polyurethane) ceiling with flame retardant and sound absorption functions. The preparation method comprises the following steps: adopting polyester isocyanate prepolymer as an adhesive; uniformly mixing the polyester isocyanate prepolymer with crushed waste PU rigid foam granules; carrying out mould pressing to manufacture the environment-friendly PU ceiling with the flame retardant and sound absorption functions. The ceiling comprises 5-10 parts of the polyester isocyanate prepolymer and 90-95 parts of the crushed waste PU rigid foam granules by weight; the polyester isocyanate prepolymer is isocyanate prepolymer which is prepared through reaction between diisocyanate and polyester polyatomic alcohol in 60-80 DEG C and contains 10-30% of NCO. The preparation method adopts the polyester isocyanate prepolymer as the adhesive; a product prepared according the method is excellent in performance, out of solvent and ...

High-flame-retardance polyisocyanurate hard foam and preparation method thereof

The invention discloses a high-flame-retardance polyisocyanurate hard foam easy for industrialized production and a preparation method thereof. The high-flame-retardance polyisocyanurate hard foam is prepared from a white material and polyisocyanates according to a mass ratio of 1:1.2-1:1.8 at 10-30 DEG C by utilizing a polyurethane low-pressure foaming machine, wherein the white material employs at least one kind of polyester polyol, at least one kind of liquid fire retardants and a solid fire retardant coated with red phosphorus capable of being conveniently dispersed in the liquid raw material. The high-flame-retardance polyisocyanurate hard foam provided by the invention has excellent flame retardance with the oxygen index larger than 30, and also has good dimension stability and thermal insulation performance while with a relatively low density.

Intumescent rigid foam polyurethane and preparation method thereof

The invention provides a preparation method of intumescent rigid foam polyurethane. The preparation method is characterized by comprising the following steps: mixing the raw materials at a ratio; then pouting into a mold to foam; and finally curing, so as to prepare the intumescent rigid foam polyurethane, wherein the intumescent rigid foam polyurethane is prepared from the following raw materials in parts by weight: 30-80 parts of polyisocyanates, 10-60 parts of polyhydric alcohols, 0.5-5 parts of a catalyst, 0.5-10 parts of a charring agent, 0.5-5 parts of a char forming catalyst, 1-10 parts of a charring-foaming agent, 2-30 parts of a fire retardant, 2-20 parts of a foaming agent and 0.1-5 parts of a foam stabilizer. The invention also provides the intumescent rigid foam polyurethane prepared by the method and application of the intumescent rigid foam polyurethane in the aspects of fireproofing and inflaming retarding. The prepared intumescent rigid foam polyurethane has excellent fireproof ...

Reaction device and process for preparing cyclohexene by selectively hydrogenating benzene

The invention relates to a reaction device and process for preparing cyclohexene by selectively hydrogenating benzene. The reaction device comprises a benzene refiner, a gas-liquid mixer, a static mixed reactor and a separation tank, wherein the benzene refiner is used for refining raw material benzene; the gas-liquid mixer is used for mixing hydrogen with catalyst slurry; the static mixed reactor is taken as a main place of selective hydrogenation; and the separation tank is used for separating a reaction product from a catalyst, wherein the reaction product and the catalyst are conveyed by using the static mixer reactor. A process method for finishing a reaction comprises the following steps of: feeding the raw material benzene into the benzene refiner for refining, and exchanging heat to 100-130 DEG C; feeding the catalyst slurry and the hydrogen into the gas-liquid mixer with a certain pressure according to a certain proportion simultaneously for fully mixing; feeding the refined benzene ...

一种电动工具用止动插销

本实用新型公开了一种电动工具用止动插销。该止动插销包括插销本体，所述插销本体为长条形，所述插销本体其中一端部呈L形，插销本体中部开设有通孔，插销本体另一端向上设有倾斜设置的限位导向板，限位导向板向插销本体中心倾斜，所述通孔下侧设有限位挡板，所述限位挡板设有两个，对称布设于通孔下侧，两个限位挡板之间留有空隙，所述插销本体中部向两侧分别设有第一限位卡头，插销本体靠近限位导向板的一端向两侧分别设有第二限位卡头。本实用新型在插销本体中部设有通孔，通孔下侧设限位挡板，某些传动机构穿过通孔，但被限位挡板卡住进而被限位，通过插销或者限位挡板的双重限位，电动工具的传动机构被完全限制，插销的限位效果优良。

Compound preparation of traditional chinese medicine and probiotics for fattening goats and preparation method thereof