31results about How to "Make sure not to break" patented technology

The invention discloses a method for preparing chitosan fibers, which comprises the following steps: mixing 2.0 to 6.0 weight percent of chitosan, 4.0 to 6.0 weight percent of lithium hydroxide, 0.5 to 4.0 weight percent of urea, 0.1 to 3.0 weight percent of glycerol and the balance of water, and swelling to prepare chitosan spinning solution; and spinning by a wet-process spinning method, coagulating and precipitating in a coagulating bath to form protofilaments, washing, drawing, and drying to obtain the chitosan fibers. In the invention, the spinning solution is prepared by dissolving chitosan in an alkaline solvent, the chitosan macromolecular chains exist in a high-swelling state, the arrangement of the chitosan macromolecular chains is more compact, the high instability of the chitosan in acidic solution is overcome, the hydrolysis of the chitosan macromolecular chains and the breakage of the glucosidic bonds are avoided, the oriented arrangement of the macromolecular chains is promoted, and the mechanical properties of the chitosan fibers are improved.

The invention discloses a dam exceeding-standard flood diversion siphon frieze group and belongs to the technical field of dam flood diversion hydraulic engineering. The siphon frieze group can disperse and bleed the exceeding-standard flood to farmland directly to protect the dam and is simple in structure, convenient to finalize, design, produce and transport, convenient and fast to construct, and low in cost. The siphon frieze group comprises a trash rack (2) arranged at the outside of an inlet of a siphon body (5); the siphon body (5) is connected with a water input tube belt valve (6); the tail end of the siphon body (5) is provided with a water output belt clamp valve (8); the water output belt clamp valve (8) is connected with a water output belt (9) made of a rigid body framework artificial synthetic material; an outlet of the water output belt (9) made of the rigid body framework artificial synthetic material is arranged above an apron (10-2) made of an artificial synthetic material; the downstream of the apron (10-2) made of the artificial synthetic material is connected with a rope net pile sandbag baffle sill (11); and the downstream of the rope net pile sandbag baffle sill (11) is connected with an apron extension (10-3) made of an artificial synthetic material. The siphon frieze group is suitable for controllable flood diversion of exceeding-standard floods for dikes, dams and auxiliary dams and dam flood diversion and rescue.

Disclosed is a multistage self-bursting soil flood diversion dam protected through geosynthetic materials. According to the multistage self-bursting soil flood diversion dam protected through the geosynthetic materials, a slope protection (2) is arranged within the upstream scouring protection range of a soil water passing dam (1), and an automatic water level indicator (3) is arranged on an upstream slope of the soil water passing dam (1); a platform (4) is laid at the upstream end of the soil water passing dam (1), and the weir crest of the soil water passing dam (1) is connected with a trapezoidal weir surface geosynthetic material protection surface (6-1); a downstream slope of the soil water passing dam (1) is connected with a trapezoidal discharge chute geosynthetic material protection surface (6-2); a rope-tied non-woven fabric threading fixing foot (8) is arranged at the bottom of a downstream slope foot of the soil water passing dam (1); and a fixing body I (7-1) is arranged at the bottom of the upstream end of the trapezoidal weir surface geosynthetic material protection surface (6-1), and a fixing body II (7-2) is arranged at the bottom of the downstream end of the trapezoidal weir surface geosynthetic material protection surface (6-1). The multistage self-bursting soil flood diversion dam is used for flood diversion of the soil dam.

The invention provides a composite bushing type water spraying desuperheater which comprises a cylinder body and an inner bushing arranged inside the cylinder body, wherein a body pipe seat is arranged above one end of the cylinder body. The composite bushing type water spraying desuperheater is characterized in that a spray nozzle strengthened protection pipe is coaxially arranged inside the body pipe seat; an outer-layer pipe mouth of the composite seat pipe is connected with the spray nozzle strengthened protection pipe; the lower end of an inner-layer pipe mouth of the composite pipe seat is arranged inside the upper end of the outer-layer pipe mouth of the composite pipe seat; the upper end of a spray nozzle pipe which is coaxially arranged inside the spray nozzle strengthened protection pipe is connected with the inner-layer pipe mouth of the composite pipe seat; and a fixed support block is arranged below the spray nozzle pipe. According to the composite bushing type water spraying desuperheater disclosed by the invention, the defects in the prior art are overcome; due to the adoption of the sealed composite bushing seat and the spray nozzle strengthened protection pipe, the application range of the composite bushing type water spraying desuperheater is widened and the safety and the reliability of the operation process of the composite bushing type water spraying desuperheater are enhanced. The composite bushing type water spraying desuperheater has the advantages of simple structure, convenience in manufacture and assembly and convenience in maintenance.

The invention discloses a method for cleaning an extruding machine and a die head of multilayer co-extrusion film blowing equipment. The method comprises the following steps of: after the last batch of formulated products are produced by extruding the last batch of formulated materials out of all extruding machines respectively, adding new materials into corresponding extruding machines respectively to start cleaning the machine until the new materials clean the last batch of materials out of the extruding machine and the die head completely; and in the machine cleaning process, making the extrusion speeds of all the extruding machines continuously fluctuated and changed up and down by using a central controller, wherein the maximum extrusion speed of all the extruding machines at the highest speed reaches 1.4 to 1.8 times the normal extrusion speed of the extruding machine, but the sum of the extrusion speeds of all the extruding machines is kept constant at all time points in the machine cleaning process. In the method, an oscillating extrusion mode is used for all the extruding machines, so that the time consumed in the machine cleaning process is short, and a small number of raw materials are consumed.

The invention discloses a plukenetia volubilis linneo shelling process and a special segment breaking device. The plukenetia volubilis linneo shelling process comprises the following steps of: performing segment breaking treatment on picked and dried plukenetia volubilis linneo; performing sorting and impurity removal on the plukenetia volubilis linneo subjected to segment breakage; classifying single segments of the impurity-free plukenetia volubilis linneo according to sizes; performing primary shelling and sorting treatment on the classified single segments of the plukenetia volubilis linneo; classifying the plukenetia volubilis linneo with inner shell according to the size of the inner shell of the plukenetia volubilis linneo; and performing secondary shelling and sorting treatment on the classified plukenetia volubilis linneo with the inner shell to obtain the impurity-free plukenetia volubilis linneo kernel. The plukenetia volubilis linneo shelling process and the special segment breaking device have the advantages that mechanical production of lukenetia volubilis linneo shelling is realized, the production efficiency is greatly increased, raw material treatment capacity of 1.5-2 ton / hour is reached, the rate of perfect kernel of the kernels reaches over 95 percent, the product quality of the kernels is improved, the process and the device are suitable for large-scale industrial production and conditions are created for industrial development of the lukenetia volubilis linneo and deep processing of a product.

The invention relates to a dam over-standard flood diversion duct tape, and belongs to the technical field of a dam flood diversion hydraulic engineering. The dam over-standard flood diversion duct tape can controllably disperse and divert over-standard flood to farmlands to protect a dam; an outlet of a dynamic floating body, adopts a novel energy dissipation mode and has the advantages of trajectory flow, surface flow and bottom flow; and the dam over-standard flood diversion duct tape is applicable to any topographical geological conditions. The dam over-standard flood diversion duct tape is simple in structure, is rapid and convenient in construction, and low in cost. The dam over-standard flood diversion duct tape adopts the structure that a cage screen (4) is placed in a hafnium U-shaped groove (3) of an upstream inlet; an HDPE (high-density polyethylene) flap valve (5) is fixed outside an inlet of a flood diversion duct body (6); the flood diversion duct body (6) is horizontally buried at the upper part of the dam (1); the downstream end of the flood diversion duct body (6) is connected with a water delivery tape (9) made of an artificial synthetic material; and an outlet of the water delivery tape (9) made of the artificial synthetic material is formed on the dynamic floating body (10). The dam over-standard flood diversion duct tape is applicable to controllable flood diversion and flood-fighting and emergency rescues of embankments and dams.

The invention discloses a dam over-standard flood diversion siphon belt and belongs to the technical field of dam flood diversion water conservancy projects. The dam over-standard flood diversion siphon belt can achieve farmland controllable floor diversion over-standard flood dam protection and dynamic floating body outlet novel energy dissipation, has the advantages of deflecting flow, face flow and bottom flow, and is applicable to any topographic and geologic condition. The dam over-standard flood diversion siphon belt is simple in structure, fast to build and low in manufacturing and is characterized in that a trash rack (2) is installed on the outer side of an inlet of a siphon body (5), the siphon body (5) is connected with a water injection pipe valve (6), the downstream tail end of the siphon body (5) is provided with a check butterfly valve (8), the outer side of the downstream tail end of the siphon body (5) is connected with a rigid framework artificial synthetic material water conveying belt (9) which is connected with an artificial synthetic material water conveying belt (10), and the tail end of the artificial synthetic material water conveying belt (10) is connected with a dynamic floating body outlet (11). The dam over-standard flood diversion siphon belt is applicable to dike and dam controllable emergency flood diversion and flood-fighting and emergency rescues.

The invention relates to a wide-body bead string handbag, and belongs to a daily product. The wide-body bead string handbag comprises a bag body (1). An opening is formed on the upper side of the bag body (1); lifting handles (1.1) are arranged on the front side and rear side of the opening; a dark button (2) is arranged on the inner side of the opening; and a bead string (4) is arranged outside the bag body (1) and formed by connecting a plurality of beads (3) end to end. The wide-body bead string handbag is characterized in that: the upper parts of left and right surfaces of the bag body (1) are provided with V-shaped break angles (1.2) sinking towards the bag body (1); the outer surface of the bottoms of the break angles (1.2) are provided with an inverted isosceles triangle areas (1.21) in which the bead string (4) is not distributed; and except the isosceles triangle areas (1.21), the bead string (4) is fixed on the front, back, left and right surfaces of the bag body (1), the bottom surface and the surfaces of the lifting handles (1.1). Due to the structure of the wide-body bead string handbag, the opening of the handbag is tightly closed, the dark button does not break away, and the positions of the break angles are not vacant.