阅读说明：本技术 一种sf6表计遮光装置 (SF6 meter shade ) 是由 张金梁 邸蕴鹏 张雨卿 曾建生 岳洋 宋彦军 于 2021-08-31 设计创作，主要内容包括：本发明涉及一种SF6表计遮光装置,包括设置在SF6表上的遮光板以及将所述遮光板固定在SF6表外壁上的夹紧装置。所述遮光板材料为可降解塑料；所述遮光板为圆柱形结构自一端的顶侧切向另一端底侧围成的图形。所述夹紧装置包括夹板以及连接套；所述夹板与所述遮光板抵接；所述夹板为U形,所述连接套为两个,分别设置在与所述夹板两侧。所述夹板材料为1Cr18Ni9Ti。所述连接套内套接有加长杆。所述夹板与所述遮光板接触的两个面均设有橡胶板,所述橡胶板厚度为1-2mm。与现有技术相比,本发明的有益效果是：通过设置的遮阳板,可以避免SF6表受到阳光的照射,影响SF6表的稳定。(The invention relates to a light shielding device of an SF6 meter, which comprises a light shielding plate arranged on an SF6 meter and a clamping device for fixing the light shielding plate on the outer wall of the SF6 meter. The shading plate material is degradable plastic; the shading plate is a pattern which is formed by a cylindrical structure and is enclosed by the top side of one end to the bottom side of the other end. The clamping device comprises a clamping plate and a connecting sleeve; the clamping plate is abutted with the shading plate; the splint are U-shaped, and the adapter sleeve is two, set up respectively with splint both sides. The splint material is 1Cr18Ni9 Ti. An extension bar is sleeved in the connecting sleeve. And rubber plates are arranged on two surfaces of the clamping plate, which are in contact with the light screen, and the thickness of each rubber plate is 1-2 mm. Compared with the prior art, the invention has the beneficial effects that: by the aid of the arranged sun shield, the SF6 watch can be prevented from being irradiated by sunlight, and stability of the SF6 watch is prevented from being affected.)

1. A SF6 table meter shade which characterized in that: comprises a shading plate (2) arranged on an SF6 watch and a clamping device for fixing the shading plate (2) on the outer wall of the SF6 watch.

2. The SF6 meter shade as defined in claim 1, wherein: the shading plate (2) is made of plastic.

3. The SF6 meter shade as defined in claim 2, wherein: the shading plate (2) is made of degradable plastics.

4. The SF6 meter shade as defined in claim 1, wherein: the shading plate (2) is cylindrical.

5. The SF6 meter shade as set forth in claim 4, wherein: the shading plate (2) is a cylindrical structure formed by the tangential from the top side of one end to the bottom side of the other end.

6. The SF6 meter shade as set forth in claim 4, wherein: the clamping device comprises a clamping plate (3) and a connecting sleeve (4); the clamping plate (3) is abutted with the shading plate (2); the clamping plate (3) is U-shaped, and the two connecting sleeves (4) are respectively arranged on two sides of the U-shaped opening of the clamping plate (3).

7. The SF6 meter shade as set forth in claim 6, wherein: the clamping plate (3) is made of spring steel.

8. The SF6 meter shade of claim 7, wherein: the material of the clamping plate (3) is 1Cr18Ni9 Ti.

9. The SF6 meter shade of claim 8, wherein: the connecting sleeve (4) is internally sleeved with a long rod (5).

10. The SF6 meter shade as set forth in claim 4, wherein: rubber plates are arranged on two surfaces, in contact with the light shielding plate (2), of the clamping plate (3), and the thickness of each rubber plate is 1-2 mm.

Technical Field

The invention relates to the technical field of transformer substations, in particular to a shading device of an SF6 meter.

Background

At present, in actual work, sunlight irradiates a SF6 switch of a transformer substation, the opening degree of the switch is calculated according to PV = nRT, and a numerical value is displayed; as the temperature rises, the pressure value rises under the same condition, and the temperature control pointer in the meter extends at the moment, so that the display pressure value of the meter is reduced, and the normal pressure value is fed back and adjusted. In actual work, because the sunshine insolate, the switch body is sealed, and the SF6 table meter is then quartzy transparent, and when sunshine shines, the speed that the temperature rose in the quartzy table meter is higher than jar body itself, leads to the table meter to appear overcompensating phenomenon. When the operation and maintenance personnel patrol, the SF6 meter is often found to display abnormal pressure reduction, and even equipment alarm is triggered. The problem brings great interference and confusion to the patrol work, so that operation and maintenance personnel cannot rapidly judge whether the equipment leaks air, manpower waste is caused, and even misoperation is caused by misjudgment of defects.

The operation and maintenance personnel find that the overcompensation phenomenon mostly occurs in 9 a.m: 00-11:00 (at the moment, the sunlight and the ground have a certain included angle), the influence of illumination on the meter at the stage is large, and the sunlight at infinity can be equivalent to a parallel beam. By constructing a mathematical model and continuously optimizing the traversal thinking of a program, the optimal shielding model suitable for shielding sunlight at a specific angle is obtained. This model is not affected by the orientation of the device and is used to block out certain angles (sun rays and earth angles) of illumination so that overcompensation is not taking place now.

The group finds that the temporary shielding of the patch compensation film and the color paper adopted on the spot through analysis cannot effectively solve the problem of overcompensation of sunlight irradiation. In order to facilitate the inspection and reading of the robot and operation and maintenance personnel, the light transmittance of the compensation film needs to be considered, so that the heat insulation performance is low. The temporary shielding of the used photographic paper is not a special shielding device. The photographic paper is used as a circular plastic sticker for distinguishing different phases of equipment in the transformer substation, and can not meet the shading requirement in the aspects of shape, material, size and the like; aiming at the situation, in order to eliminate hidden danger, equipment capable of shielding sunlight is urgently needed at present, the metering accuracy is guaranteed, and the situation that an SF6 table is misreported due to sunlight irradiation is prevented.

Disclosure of Invention

The invention aims to provide a light shielding device for an SF6 meter, which has the capability of shielding sunlight and preventing false alarm caused by illumination.

In order to solve the technical problems, the invention provides the following technical scheme:

a SF6 table meter shade which characterized in that: comprises a light screen arranged on an SF6 watch and a clamping device for fixing the light screen on the outer wall of the SF6 watch.

The shading plate material is plastic.

The shading plate material is degradable plastic.

The shading plate is a pattern formed by a cylindrical structure and enclosed by the top side of one end, the bottom side of the other end and the periphery.

The clamping device comprises a clamping plate and a connecting sleeve; the clamping plate is abutted with the shading plate; the splint are U-shaped, and the adapter sleeve is two, set up respectively with splint U-shaped structure's both sides.

The clamping plate is made of spring steel.

The splint material is 1Cr18Ni9 Ti.

A long rod is sleeved in the connecting sleeve.

And rubber plates are arranged on two surfaces of the clamping plate, which are in contact with the light screen, and the thickness of each rubber plate is 1-2 mm.

Compared with the prior art, the invention has the beneficial effects that:

1. the splint can be easily opened by the arranged long rod and is fixed on the outer side of the SF6 watch;

2. the rubber plate and the reticulate patterns arranged on the rubber plate can increase the friction force between the rubber plate and the clamping plate and between the rubber plate and the sun shield, and prevent the clamping plate from loosening; meanwhile, the rubber plate can reduce the abrasion of the clamping plate to the sun shield, and the service life of the sun shield is prolonged; tests show that; if the thickness of the rubber plate is too thick and exceeds 2mm, the clamping force of the clamping plate is influenced, and if the thickness of the rubber plate is too thin and is lower than 1mm, the sun-shading plate is easily clamped by the clamping plate;

3. by the aid of the arranged sun shield, the SF6 watch can be prevented from being irradiated by sunlight, and stability of the SF6 watch is prevented from being influenced;

4. by adopting the degradable plastic as the sun shield, the environment pollution caused by the unnecessary sun shield can be avoided, and the sun shield is beneficial to offspring.

Drawings

FIG. 1 is a front view of the present invention in a schematic configuration;

FIG. 2 is a schematic left side view of the structure of the present invention;

FIG. 3 is a schematic top view of the splint;

FIG. 4 is a schematic diagram of the fabrication of a light shielding plate.

In the figure: 1-SF6 watch, 2-shading plate, 3-splint, 4-connecting sleeve, 5-extension bar, 6-rubber plate and 7-sunlight.

Detailed Description

It should be noted at the outset that the discussion of any embodiment of the present invention is illustrative only and is not intended to suggest that the scope of the present disclosure (including the claims) is limited to these examples; there are many other variations of the different aspects of the invention as described above which are not provided in detail for the sake of brevity. Accordingly, other embodiments are within the scope of the following claims.

In addition, the drawings in the following description are only preferred embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on the drawings without inventive efforts. In addition, the present invention is not limited to these embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Furthermore, in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., is typically an orientation or positional relationship based on a coordinate system shown in the front view of the device itself or the corresponding sub-component, and that the set of coordinate systems will not rotate with it when other directional views are discussed. In addition, in the case of a rod-like or elongated member, the term "front end" and the term "head" have the same meaning, and the term "rear end" and the term "tail end" and the term "end" have the same meaning. Rather, the foregoing directional terms are used merely to facilitate describing the present application and to simplify the description, and they do not indicate or imply that the apparatus or component being referred to must have a particular orientation or be constructed and operated in a particular orientation without having been stated to the contrary or otherwise specified, and therefore should not be considered limiting of the scope of the present application; further, the terms "inner and outer" with respect to orientation refer to the inner and outer relative to the profile of the respective component itself.

Furthermore, spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented (rotated 40 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", etc. are used to define the components, and are only used to facilitate distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, especially, have no special meaning in "main, secondary" or arrangement order, and therefore, should not be construed as limiting the scope of the present application.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Examples

Referring to figures 1-4 of the drawings,

the SF6 switch pressure value is an important index for arc extinction, so the SF6 switch pressure is an important characteristic to reflect whether the switch is in a normal state or not. Because expend with heat and contract with cold, the SF6 table meter has temperature compensation device, and the device table meter and jar body two parts receive the sun illumination influence of specific period great, consequently combine the thinking of sunshade cap, design the device of peaked cap structure, can shelter from the sun ray of specific angle, and the material is saved the most.

The embodiment provides a shading device of an SF6 meter, which comprises a shading plate 2 arranged on an SF6 meter and a clamping device for fixing the shading plate 2 on the outer wall of the SF6 meter;

the shading plate 2 is made of plastic;

the shading plate 2 is made of degradable plastic;

the shading plate 2 is a cylindrical structure formed by encircling from the top side of one end to the bottom side of the other end; the bevel cutting principle of the cylindrical structure is discussed in detail below.

The clamping device comprises a clamping plate 3 and a connecting sleeve 4; the clamping plate 3 is abutted with the shading plate 2; the splint 3 is U-shaped, and the connecting sleeve 4 is two, set up respectively with splint 3 both sides.

The clamping plate 3 is made of spring steel.

The material of the splint 3 is 1Cr18Ni9 Ti. Stainless steel is adopted, so that rusting is prevented, and performance is not affected.

An extension bar 5 is sleeved in the connecting sleeve 4.

Rubber plates are arranged on two surfaces, in contact with the light shading plate 2, of the clamping plate 3, and the thickness of each rubber plate is 1-2 mm. And the two surfaces of the rubber plate are provided with reticulate patterns so as to increase the friction force.

As shown in fig. 4, in order to save materials, the bevel cutting principle and calculation process of the cylindrical structure of the light-shielding plate 2 are as follows;

1. the principle of the bevel cutting is that,

by constructing a mathematical model, as shown in fig. 4, table 1: sunlight 7 is equivalent to a parallel light beam, an SF6 meter 1 is equivalent to a cylindrical bottom shadow surface on the model, and the model suitable for shading is obtained by program optimization by using the thought of the cricket cap in life for reference. The model has the characteristics that the model can shield the equipment from being irradiated by light rays with specific angles, so that the overcompensation phenomenon does not occur any more.

Serial number	Constraint of mathematical formula	Definition of mathematical formula
			（a）		r is the radius of the SF6 barometer, and the shaded surface of the circle can be equivalent to the surface of the SF6 barometer;
（b）		m, n and p are direction vectors of parallel light beams in a three-dimensional space, and (x 0, y0 and z 0) are points on a circular shadow plane, namely points on an SF6 barometer to be shielded;
			（c）		cutting the cylinder according to the section equation to form the peak cap. Calculating k and d meeting the critical shading requirement through programming iterative calculation;

TABLE 1

2. The design idea of the algorithm is that,

a nested for loop iterates a multidimensional synthesis calculation,

the nested for loop iteration multidimensional comprehensive calculation has high precision and high calculation speed, and a corresponding optimal model can be directly solved or an optimal model with universality (the area of the light shielding plate 2 is the minimum, and materials are saved most) can be calculated according to a meter at a specific position.

Plastics are high molecular compounds (macromolecules) which are polymerized by addition polymerization or polycondensation reaction and are intermediate in deformation resistance between fibers and rubber, and are composed of synthetic resin, fillers, plasticizers, stabilizers, lubricants, pigments and other additives.

The main component of the plastic is resin. The resin means a polymer compound which has not been mixed with various additives. The term resin is originally named as lipids secreted by animals and plants, such as rosin, shellac, and the like. The resin accounts for about 40-100% of the total weight of the plastic. The basic properties of plastics are largely determined by the nature of the resin, but additives also play an important role. Some plastics consist essentially of synthetic resins, with no or little additives, such as plexiglas and the like;

plastics are important organic synthetic polymer materials and are widely applied. However, the white pollution caused by the waste plastics is more and more serious, and if people can understand the composition and classification of the plastics in detail, the method not only can help people to scientifically use the plastic products, but also is beneficial to the classified recovery of the plastics, and effectively controls and reduces the white pollution.

The different properties of plastics determine their use in the industry and, with advances in technology, the modification of plastics has not been studied. Hopefully, in the near future, the modified plastic can be widely applied, even can replace materials such as steel and the like, and does not pollute the environment any more;

molecular structure of plastic: there are basically two types: the first is a linear structure, and a high molecular compound having such a structure is called a linear high molecular compound; the second type is a bulk structure, and a polymer compound having such a structure is called a bulk polymer compound. Some polymers have branched chains, called branched polymers, which are linear structures. Some polymers have cross-linking among molecules, but the cross-linking is less, so the polymers are called as network structures and belong to body-type structures;

two different structures, showing two opposite properties. Linear structure, melting by heating, and small hardness and brittleness. The body structure has higher hardness and brittleness. The plastic has two kinds of structure, including linear polymer, thermoplastic polymer and solid polymer, which are both thermoplastic and thermosetting.

Material properties of the plastic:

the < 1 > is resistant to chemical attack,

the < 2 > has luster, is partially transparent or semitransparent,

the (3) is mostly a good insulator,

the < 4 > is light and firm,

the < 5 > is easy to process, can be mass-produced, is low in price,

the < 6 > has wide application, multiple effects, easy coloring and part high temperature resistance,

the advantages of the plastic are:

1. most plastics have strong corrosion resistance, do not react with acid and alkali,

2. the plastic has the advantages of low manufacturing cost,

3. durable, waterproof and light in weight,

4. can be easily molded into different shapes,

5. is a good insulator and is a good insulator,

6. the plastic can be used for preparing fuel oil and fuel gas, so that the crude oil consumption can be reduced;

the disadvantages of plastics are:

1. when the waste plastics are recycled, the classification is very difficult and the economic efficiency is not good,

2. plastics are easily combustible, and generate toxic gases during combustion. For example, polystyrene generates toluene when burning, a small amount of the toluene can cause blindness, vomit when being inhaled, and the like, PVC also generates hydrogen chloride toxic gas when burning, and besides the burning, namely the high-temperature environment, the PVC can cause plastics to decompose toxic components, such as benzene and the like,

3. plastics are made from petroleum-refined products, the petroleum resources are limited,

4. the plastic can be rotten for hundreds of years after being buried under the ground,

5. the plastic has poor heat resistance and the like, is easy to age,

6. because of the inability of plastics to degrade naturally, it has become the first enemy of humans and has also led to the tragedy of death in many animals. Animals such as monkeys, pelicans, dolphins and the like in an zoo can mistakenly swallow a plastic bottle No. 1 which is lost by tourists and finally die painfully due to indigestion; looking at beautiful and pure sea surface, people can see that the sea surface is nearly full of various plastic wastes which can not be accommodated by the sea, and various plastic which can not be digested is found in intestines of a plurality of dead sea bird samples.

Biodegradation of plastics:

professor of the Yangjun of Beijing aerospace university says: "plastics biodegrade rapidly in the yellow mealworm gut, revealing a new fate to discard plastic waste in the environment. ";

plastics are difficult to naturally degrade in the environment, and polystyrene is the most important, and it is widely believed that microorganisms cannot degrade polystyrene plastics due to high molecular weight and high stability. Two sister research papers were collaboratively published by professor of Yang Jun of Beijing aerospace university, Shenzhen Hua Dagenecompany Zhaojiao Booshi in 2015 in authoritative journal Environmentalscience & Technology in the field of environmental discipline, and it was proved that larvae of Tenebrio molitor (Tenebrio) can degrade polystyrene which is the most difficult to degrade plastics;

the study showed that with polystyrene foam as the sole food source, tenebrio molitor larvae could survive for more than 1 month and eventually develop into adults whose eaten polystyrene was either completely degraded to mineralize CO2 or assimilated to body fat. This discovery provides a way to solve the global problem of plastic contamination;

the pollution of petrochemical production plastic waste is a worldwide environmental problem. Most plastics are disposable after consumption. The academic world has considered that plastic products are not decomposed in natural environment for tens to hundreds of years due to stable physical and chemical structures;

professor Yang Jun introduces that 2.99 million tons of plastics are globally consumed in 2013, wherein polystyrene plastics account for 7 percent, about 2100 million tons of plastics are consumed each year, and common materials which can bear the temperature of boiled water, such as plastic lunch boxes, coffee cups and the like, are polystyrene. Authoritative surveys have shown that polystyrene, a plastic, degrades only in the 0.01% -3% range for 4 months in soil, sludge, rotting garbage, or manure microflora;

about 4000 million tons of waste plastics are accumulated in the environment every year around the world, and about 200 million tons of waste plastics are lost in the environment every year in China. Taking agricultural films for farmlands as an example, the annual output of agricultural films in China reaches millions of tons, the agricultural films are increased by 10 percent each year, and all film-covered soil has residual films no matter what crops are covered. According to statistics, the annual residual quantity of agricultural films in China is up to 35 ten thousand tons, the residual film rate is up to 42 percent, and a large amount of residual films are left on a 0-30 cm plough layer of a farmland. That is, nearly half of the agricultural film remains in the soil, which is a great hidden trouble in food safety;

"plastics are completely assimilated in soil by microorganisms, degrading into CO2 and water to achieve inorganic mineralization, and may take 200-400 years to cause accumulation in the environment. "professor Yang Jun tells the sheep city of the late reporter;

from 2005, the poplar army began investigating the biodegradation of plastics. Mainly attacking the degradation of the most difficult-to-degrade plastics such as polystyrene;

scientists have previously used several soil invertebrate experiments such as earthworms, millipedes, slugs, snails, etc. to see if they can eat plastic. When fed with 14C-labeled plastics such as polyvinyl chloride (PVC), Polyethylene (PE) and polypropylene (PP), the results showed no degradation;

the Yangjun considers that the idea of biodegradable plastics is developed, the biodegradable plastics can not only be limited to microorganisms, but also consider lepidoptera insects, termites and the like, marine ship moths and bore mussels can erode polyethylene and submarine cables, and can also consider separating and cloning key enzymes and genes thereof which can generate active groups from the organisms;

studies in 2014 of the Yangjun team found that wax worms (Indian meal moth larvae) can chew and eat polyethylene PE films, and intestinal tracts of the larvae separate out two strains capable of degrading the PE films, namely Enterobacter YT1 and Bacillus YP 1. Later research groups found that tenebrio larvae were an animal that eaten more plastic than wax worms, were larger in size (typically 35 mm long and 3 mm wide), and could use foam as the sole food product. Tenebrio molitor has 4 stages of life: eggs, larvae, pupae, and adults;

tenebrio molitor, also called Tenebrio molitor, belongs to the genus Tenebrio (Walker) of the family Piropteraceae, the order Coleoptera, on the taxonomic order of insects. The original product in North America, 50 years, the Chinese feed was introduced from the Soviet Union, and yellow mealworms were known as a protein feed bank. Its dried product contains fat 30%, protein more than 50%, and also contains phosphorus, potassium, iron, etc. The dry tenebrio molitor larvae contain about 40% of protein, 57% of pupae and 60% of adults.

In China, the yellow mealworms are similar to silkworms in nature, can be eaten directly by human beings and can also be used as feeds when being fried, and the yellow mealworms are used as the feeds for feeding scorpions, centipedes, geckos, snakes, tropical fishes and goldfishes, so that the yellow mealworms not only grow fast and have high survival rate, but also have strong disease resistance and greatly improved fertility. The yellow mealworm cultivation is very easy, and farmers can cultivate fresh oat, wheat bran and apple;

the professor Yang military bought polystyrene plastic raw materials from the petrochemical Yanshan division, which had no additives and catalysts. Whereas α -13C, β -13C labeled polystyrene plastic samples were purchased from the United states. The yellow mealworms are purchased from insect farms such as Beijing Daxing and Hebei Qinhuang island, and are bred by grains, and the yellow mealworms are 3-4 insect ages (namely 3-4 times of skin fading);

the tenebrio molitor is placed in a polypropylene plastic container having a foam block. The experimenters regularly measured the weight of the foam mass eaten by the Tenebrio molitor, the control group was Tenebrio molitor raised on regular wheat bran, 500 Tenebrio molitors in the experiment were raised individually on a controlled greenhouse (25 + -1 deg.C, 80 + -2% humidity, and 16:8 light/dark cycle) with 5.8 grams of foam as the sole food. In the hatching process, dead yellow mealworms are immediately removed;

in the experiment, the poplars and the like feed the tenebrio molitor larvae by taking foamed plastic as a single food source. Comparing normally reared (bran fed) and fasted larvae, it was found that, although the dry weight of larvae did not increase significantly (+33.6%) as in normally reared larvae, only increased by a small amount of 0.2% (due to the lower water content and nutritional value of the foam compared to bran) within the 16 day experimental period, it did not decrease significantly (-24.9%) as in fasted larvae, and there was no significant difference in survival rate of larvae compared to the plastic and bran fed groups;

34-39 mg of foam plastic can be eaten by 100 yellow mealworms every day. During the 16 day test period, 47.7% of the worm uptake into the foam was converted to CO 2. While the remaining (about 49.2%) are converted to rabbit stool-like biodegradable particles are excreted. The experiments demonstrated that polystyrene plastic labeled with alpha-13C or beta-13C was mineralized to carbon 13 labeled carbon dioxide and lipids. Degrading the polystyrene foam in the intestinal tract of the larva within the retention time of no more than 24 hours;

the larvae fed with polystyrene foam as the sole food developed into adult crustaceans in the same healthy state as those fed with normal food (wheat bran) after 1 month. The tenebrio molitor drafted a hole in the foam. After passing through the intestinal tract of the insect, the chemical structure and composition of the ingested foam changes. Gel Permeation Chromatography (GPC), carbon-13 nuclear magnetic resonance spectrum and thermogravimetric Fourier transform infrared spectrum are adopted to verify that polystyrene long-chain molecules in the intestinal tract of the larva are broken to form larva metabolites which are discharged along with excrement;

the experiment also successfully separated the polystyrene degradation bacterium, namely microbacterium YT2 (Exiguobacterium YT2), which can grow by using polystyrene as a unique carbon source in the intestinal tract of the larva. The strain is preserved in the common microorganism center of China Committee for culture Collection of microorganisms and the national gene bank, and is the first strain of polystyrene degrading bacteria preserved in the culture center reported internationally;

research teams give the mechanism of yellow meal larva eating degradation of polystyrene: firstly, the foam plastics are chewed and eaten into fine fragments by yellow meal larvae and are taken into intestinal tracts; secondly, the contact area of the polystyrene foam with the microorganisms and the extracellular enzymes is increased through the chewing effect, and the ingested fragments are further depolymerized into micromolecular products under the action of the extracellular enzymes secreted by the intestinal microorganisms; thirdly, the small molecular products are further degraded and assimilated to form larva self tissues under the action of a plurality of enzyme bacteria and yellow meal larva self enzymes; and fourthly, mixing partial residual foam fragments and partial degradation intermediate products, and excreting out the mixed product in the form of insect feces into the body, wherein the foam plastics in the insect feces can be further degraded.

The components of the plastic are as follows:

the plastic material that we usually use is not a single component, it is formulated from a number of materials. Wherein the high molecular polymer (or called synthetic resin) is the main component of the plastic, and in addition, in order to improve the performance of the plastic, various auxiliary materials such as filler, plasticizer, lubricant, stabilizer, colorant, antistatic agent, etc. are added into the high molecular compound, so as to obtain the plastic with good performance;

the plastic additives are compounds which are necessary to be added for improving the processability of polymers (synthetic resins) during molding and processing or for improving the properties of the resins themselves. For example, a plasticizer added for softening a product in order to lower the molding temperature of a polyvinyl chloride resin; in addition, for example, a foaming agent is added for preparing the light, vibration-resistant, heat-insulating and sound-insulating foam plastic; the thermal decomposition temperature of some plastics is very close to the molding processing temperature, and the plastics cannot be molded without adding a heat stabilizer. Therefore, the plastic additive plays a particularly important role in plastic molding processing;

synthetic resins are the most important components of plastics, and their content in plastics is generally 40% to 100%. Resins are often considered synonyms for plastics because of the large content and the nature of the resin often determining the nature of the plastic. For example, polyvinyl chloride resin and polyvinyl chloride plastic, and phenol resin and phenol plastic are mixed. In fact, resin and plastic are two different concepts. Resin is a raw, virgin polymer compound that is not only used to make plastics, but is also a raw material for paints, adhesives, and synthetic fibers. Besides a small part of the plastic contains 100% of resin, most of the plastic needs to be added with other substances besides the main component resin;

the filler is also called filler, which can improve the strength and heat resistance of the plastic and reduce the cost. For example, the addition of wood flour to phenolic resin can greatly reduce the cost, make phenolic plastic one of the cheapest plastics, and also significantly improve the mechanical strength. The fillers can be classified into organic fillers such as wood flour, chopped cloth, paper, and various textile fibers, and inorganic fillers such as glass fiber, diatomaceous earth, asbestos, carbon black, and the like. The content of the filler in the plastic is generally controlled below 40 percent;

the plasticizer, or called plasticizer, can increase the plasticity and softness of the plastic, reduce the brittleness, and make the plastic easy to process and mold. Plasticizers (plasticizers) are generally high boiling point organic compounds that are miscible with the resin, non-toxic, odorless, and light and heat stable, and are most commonly phthalates. For example, when polyvinyl chloride plastics are produced, soft polyvinyl chloride plastics can be obtained by adding more plasticizer, and no or little plasticizer is added;

the stabilizer is mainly an agent for stabilizing a polymer plastic, rubber, synthetic fiber, etc. and preventing decomposition and aging thereof. In order to prevent the synthetic resin from being decomposed and damaged by the action of light and heat during processing and use and to prolong the service life, a stabilizer is added into the plastic. Commonly used are stearates, epoxy resins, and the like. The dosage of the stabilizer is generally 0.3-0.5% of the plastic;

the colorant can make the plastic have various bright and beautiful colors. Organic dyes and inorganic pigments are commonly used as colorants. The natural color of the synthetic resin is mostly white translucent or colorless transparent. Coloring agents are often used in industrial processes to increase the color of plastic articles;

the lubricant is used for preventing the plastic from being stuck on a metal mould during molding and simultaneously enabling the surface of the plastic to be smooth and beautiful. Common lubricants include stearic acid and its calcium magnesium salts;

prevent the plastic from being heated and oxidized during the heating forming or high-temperature use process, so as to prevent the plastic from turning yellow, cracking and the like.

Besides the above-mentioned adjuvant, the plastics also can be added with fire-retardant, foaming agent, antistatic agent, conductive agent, magnetic conductive agent and compatilizer. To meet different use requirements;

plastics are poor electrical conductors and therefore are readily electrostatically charged, and antistatic agents can impart light to moderate electrical conductivity to the plastic, thereby preventing the build-up of static charge on the article.

The PHA degradable plastic has the most excellent performance in the biodegradable plastic, and is still in the market starting stage at present due to higher cost and more complex production process. In 2010, the capacity of PHA is less than 8 ten thousand tons, and the American Metabolix company has about 5 ten thousand tons, which occupies more than 60% of the market. China enterprises are also advanced in PHA production process and research and development, Tianjin national rhyme biomaterial Co., Ltd has PHA productivity of 1 ten thousand tons, Ningbo Tianan has productivity of 2000 tons, and Shenzhen Italian Manzhi Biotech Co., Ltd has productivity of 5000 tons. The Kaneka company in Japan and the PHB Industrial company in Brazil are typical representatives of the PHA industry, and are all drivers of the PHA industry, and although the application of PHA is limited at present, the actual sale amount of Metabolix per year is not more than 100 tons, the market potential of PHA is huge with the gradual expansion of the downstream application in the future, particularly the further maturity of the application in the industries such as film packaging, agricultural film, edible tableware, non-woven fabrics and the like.

In conclusion, the sun visor 2 of the present invention is made of biodegradable plastic; avoiding white pollution and benefiting descendants.

The working process of the present invention is as follows,

the sun shield 2 is placed on two sides of an SF6 watch, the splint 3 is opened by the extension rod 5, the splint 3 is clamped outside the sun shield 2, the sun shield 2 is fixed with the SF6 watch, the sunlight can be shielded, and the influence of the sunlight on the SF6 watch is avoided.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.