阅读说明：本技术 一种绝缘导线接续装置 (Insulated wire connecting device ) 是由 陈星� 陆郑超 庄元彬 姚伟楠 张凯 刘康健 叶福春 汪洪江 汪继勇 邹文明 秦 于 2020-11-26 设计创作，主要内容包括：本发明公开了一种绝缘导线接续装置,涉及电力作业辅助设备技术领域,包括壳体、内楔子、固定端头和导线,所述壳体为锥形结构,所述内楔子与壳体内部滑动配合,所述内楔子包括两个配合设置的夹管,且夹管间距可调,并通过弹簧与固定端头连接,所述固定端头一端与壳体连接,另一端插设有导线,所述导线位于固定端头的一端与弹簧连接,本发明将断线插入绝缘导线接续装置的两端后,能够实现断线的连接,完成断线的补修,大大降低了断线抢修时间,提高了检修效率,同时安装在断线上后,若需要进行拆卸等后处理,只需将固定端头与壳体拆开,即能够将夹紧的内楔子松开,后处理方便,便于重复利用,降低整体成本。(The invention discloses an insulated wire connecting device, which relates to the technical field of electric power operation auxiliary equipment and comprises a shell, an inner wedge, a fixed end and a wire, wherein the shell is of a conical structure, the inner wedge is in sliding fit with the inside of the shell, the inner wedge comprises two clamping pipes which are arranged in a matching way, the distance between the clamping pipes is adjustable, the clamping pipes are connected with the fixed end through springs, one end of the fixed end is connected with the shell, the other end of the fixed end is inserted with the wire, and the wire is positioned at one end of the fixed end and connected with the springs. The post-treatment is convenient, the reutilization is convenient, and the overall cost is reduced.)

1. The utility model provides an insulated wire device that continues, its characterized in that, includes casing (1), interior wedge (2), fixed end (3) and wire (4), casing (1) is the toper structure, interior wedge (2) and casing (1) inside sliding fit, interior wedge (2) are including two double-layered pipes (21) that the cooperation set up, and press from both sides pipe (21) interval adjustable to be connected with fixed end (3) through spring (5), fixed end (3) one end is connected with casing (1), and the other end is inserted and is equipped with wire (4), wire (4) are located the one end of fixed end (3) and are connected with spring (5).

2. An insulated wire splicing device according to claim 1, wherein the clamping tube (21) is fittingly connected by a pin (22), the clamping tube (21) is symmetrically provided with a notch (23) and a socket (24) in cross section, and the pin (22) comprises an arc block (25) fitted with the notch (23) and a cylinder (26) fitted with the socket (24).

3. An insulated wire splicing device according to claim 2 wherein said pin (22) is provided with a spring retaining opening (27) in the outer wall thereof.

4. An insulated conductor splicing device according to claim 1, characterized in that a protective terminal (6) is embedded in the end of the housing (1) remote from the fixed terminal (3).

5. An insulated conductor splicing device according to claim 4, wherein the protective tip (6) is provided with a top cap (61) at the end located in the housing.

6. The insulated wire splicing device according to claim 5, wherein the outer wall of the top cap (61) is provided with top cap non-slip threads (62).

7. The insulated wire splicing device according to any one of claims 1 to 6, wherein the inner wall of the clamping tube (21) is provided with anti-slip threads (211).

8. The insulated wire splicing device according to any one of claims 1 to 6, wherein the fixed end (3) comprises a wire connecting part (31), a middle rotating part (32) and a shell connecting part (33), and an assembly notch (34) matched with the end of the shell (1) is formed in the outer circle of the end of the shell connecting part (33); the transfer portion (32) is of a conical structure, a positioning nut (35) is arranged in the transfer portion, and the outer circle of the positioning nut (35) is an inclined plane (36) matched with the transfer portion (32).

9. The insulated wire splicing device of claims 1 to 6 wherein the housing is made of an ultraviolet light oxidation resistant polypropylene composite material, the preparation of the ultraviolet light oxidation resistant polypropylene composite material comprising the steps of:

(1) adding 5-10 parts of deacetylated chitin into 500 parts of methanesulfonic acid (300), fully swelling, adding 30-40 parts of trimethoxycinnamoyl chloride and 3-6 parts of triethylamine, reacting for 25-35h, precipitating with acetone, filtering, and drying the precipitate to obtain modified deacetylated chitin;

(2) mixing 5-8 parts of titanium chloride and 35-55 parts of acetic acid/acetic anhydride mixed solution, heating to 90-110 ℃, reacting to generate white precipitate, adding 10-15 parts of acetic acid/acetic anhydride mixed solution again, reacting until the acid is completely volatilized, filtering to obtain the precipitate, placing the precipitate in 300-450 parts of ethanol for reacting at the temperature of 200-210 ℃ for 6-12h, and then washing and drying to prepare mesoporous hollow titanium dioxide particles;

(3) placing 5-10 parts of modified deacetylated chitin in 3000 parts of 1-2wt% acetic acid aqueous solution for dispersing and dissolving, then adding 8-10 parts of mesoporous hollow titanium dioxide particles, stirring for 30-60h, filtering and taking precipitate to obtain mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin;

(4) dispersing mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin in deionized water, adding 0.5-1 part of glutaraldehyde, heating to 35-40 ℃, reacting for 2-4h, and then filtering and drying to prepare ultraviolet light oxidation resistant titanium dioxide particles;

(5) placing the ultraviolet light oxidation preventing titanium dioxide particles in 1-2wt% of aminopropyltriethoxysilane aqueous solution for reaction for 12-18h to carry out silane modification;

(6) 100 parts of polypropylene and 1-5 parts of ultraviolet light oxidation prevention titanium dioxide particles are placed in a mixing roll to be mixed for 20-30min, and then the mixture is subjected to double-screw extrusion at the temperature of 200-220 ℃ to prepare the ultraviolet light oxidation prevention polypropylene composite material.

10. The apparatus according to claim 9, wherein the concentration of acetic acid in the acetic acid/acetic anhydride mixture is 50 to 70 wt%.

Technical Field

The invention relates to the technical field of electric power operation auxiliary equipment, in particular to an insulated wire connection device.

Background

At present, in the power transmission process, the connection stability of the wire is an important factor influencing the whole power transmission, in real life, the wire is usually broken due to thunderstorm or other factors, and in order to quickly restore the power transmission, the connection of the wire is usually realized through a splicing fitting in the prior art, so that the repair of the broken wire is completed. The splicing fitting is used for splicing two terminals of a wire of an overhead power line, bears all tension of the wire (a lightning conductor), and is used as a conductor, and the following conditions must be met after the wire is spliced: the mechanical strength of the connecting point is not less than 95% of the calculated breaking force of the connected wire, the resistance between two points at the connecting position of the wire is not more than the resistance of the wire with the same length, and the temperature rise at the connecting position of the wire is not more than the temperature rise of the connected wire. The existing wire splicing fitting comprises various splicing tubes, parallel groove clamps and the like. For example, a "large-section wire splicing sleeve" disclosed in chinese patent document, publication No. CN201741817U, discloses a large-section wire splicing sleeve for an extra-high voltage transmission line in a power system. The splicing sleeve is realized by a layered crimping structure which is provided with a splicing sleeve steel core with a circle groove at one end or two ends, the splicing sleeve steel core is crimped with a lead steel core, an inner layer of a lead is crimped with the circle groove at the end part of the splicing sleeve steel core by a sub splicing sleeve, and then the main splicing sleeve, the sub splicing sleeve and an outer layer of the lead are crimped. However, when the wire splicing sleeve is used for splicing, a professional pressing tool such as a hydraulic clamp must be used, and the professional pressing tool such as the hydraulic clamp is heavy and inconvenient to carry; meanwhile, the operation of connecting wires is complex, the operation time of electric power workers is increased, and the operation danger is high.

Disclosure of Invention

The invention aims to overcome the defects that in the prior art, when a wire splicing sleeve is spliced, a professional pressing tool such as a hydraulic clamp is needed, and the professional pressing tool such as the hydraulic clamp is heavy and inconvenient to carry; meanwhile, the operation of connecting the wires is complex, the operation time of electric workers is increased, the operation danger is high, and the like, and the insulating wire connecting device is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an insulated wire connecting device, includes casing, interior wedge, fixed end and wire, the casing is the toper structure, interior wedge and the inside sliding fit of casing, interior wedge includes the double-layered pipe that two cooperations set up, and presss from both sides the pipe interval adjustable to be connected with fixed end through the spring, fixed end one end is connected with the casing, and the other end is inserted and is equipped with the wire, the wire is located the one end and the spring coupling of fixed end.

When the invention is used, a broken wire can be inserted into the insulated conductor connecting device through the end part of the shell, the broken wire can be inserted into the inner wedge in the broken wire inserting process, at the moment, under the external acting force, the inner wedge can compress the spring and slide along one side with a larger section of the conical shell, meanwhile, as the inner wedge is composed of the clamp pipes which are arranged in a matching way and the distance between the clamp pipes can be adjusted, the distance between the clamp pipes can be gradually increased until the broken wire can be inserted into the inner wedge, after the insertion is finished, because the spring is in a compression state, the outward thrust of the spring can lead the clamp pipes to firmly clamp the broken wire, meanwhile, when the broken wire is subjected to the external tension, because of the outward thrust of the spring, the inner wedge can firmly clamp the broken wire, after the broken wire is inserted into two ends of the insulated conductor connecting device, the connection of the broken wire can be realized, and the repair of the broken wire can be completed, greatly reduces the time for rush-repair of broken wires and improves the maintenance efficiency. Meanwhile, the fixed end is connected with the shell, so that the inner wedge clamping device is convenient to disassemble, and after the inner wedge clamping device is installed on a broken line, if post-treatment such as disassembly is needed, the clamped inner wedge can be loosened only by disassembling the fixed end and the shell, so that the inner wedge clamping device is convenient to post-treat, convenient to recycle and capable of reducing the overall cost.

Preferably, the clamping pipes are connected in a matched mode through pins, notches and inserting openings are symmetrically formed in the sections of the clamping pipes, and the pins comprise arc-shaped blocks matched with the notches and cylinders matched with the inserting openings.

The invention adopts the matching connection of the pin clamping pipes, wherein the arc-shaped block on the pin is embedded into the notch of the clamping pipe, the cylinder on the pin is inserted into the socket of the clamping pipe to realize the matching of the clamping pipe, when the broken wire is inserted into the inner wedge, the arc-shaped block and the notch can generate relative sliding, the adjustment of the space between the clamping pipes is realized, and meanwhile, the dislocation of the clamping pipes is avoided.

Preferably, the outer wall of the pin is provided with a spring clamping opening.

The spring clamping opening facilitates connection of the spring and the inner wedge.

Preferably, the end of the shell far away from the fixed end is embedded with a protective end.

The protective tip is used to protect the end of the housing.

Preferably, one end of the protection end head positioned in the shell is provided with a top cap.

When the invention is not used, the top cap can realize plugging and prevent dust and the like from entering; in use, the broken string may be inserted into the top cap, ejected and inserted into the inner wedge.

Preferably, the outer wall of the top cap is provided with top cap anti-skid grains.

Preferably, the inner wall of the clamping pipe is provided with anti-skid grains.

The broken line is inserted into the inner wedge, and the anti-slip lines of the top cap increase the friction force of the inner wall of the inner wedge on the broken line and the top cap, so that the inner wedge is prevented from being separated.

Preferably, the fixed end comprises a wire connecting part, a transfer part and a shell connecting part, an assembly notch matched with the end part of the shell is formed in the outer circle of the end part of the shell connecting part, the transfer part is of a conical structure and is internally provided with a positioning nut, and the outer circle of the positioning nut is an inclined plane matched with the transfer part.

The assembly gap can enable the fixed end head and the shell to be connected better; positioning nut is used for the fixed wire that inserts wire connecting portion for the wire is more firm with being connected of spring, simultaneously, because transit portion is the toper structure, the positioning nut excircle be with transit portion matched with inclined plane, under the exogenic action, the transit portion on positioning nut and the fixed end is taut, has increased the stability of whole device.

Preferably, the shell is made of an ultraviolet light oxidation prevention polypropylene composite material, and the preparation of the ultraviolet light oxidation prevention polypropylene composite material comprises the following steps:

(1) adding 5-10 parts of deacetylated chitin into 500 parts of methanesulfonic acid (300), fully swelling, adding 30-40 parts of trimethoxycinnamoyl chloride and 3-6 parts of triethylamine, reacting for 25-35h, precipitating with acetone, filtering, and drying the precipitate to obtain modified deacetylated chitin;

(2) mixing 5-8 parts of titanium chloride and 35-55 parts of acetic acid/acetic anhydride mixed solution, heating to 90-110 ℃, reacting to generate white precipitate, adding 10-15 parts of acetic acid/acetic anhydride mixed solution again, reacting until the acid is completely volatilized, filtering to obtain the precipitate, placing the precipitate in 300-450 parts of ethanol for reacting at the temperature of 200-210 ℃ for 6-12h, and then washing and drying to prepare mesoporous hollow titanium dioxide particles;

(3) placing 5-10 parts of modified deacetylated chitin in 3000 parts of 1-2wt% acetic acid aqueous solution for dispersing and dissolving, then adding 8-10 parts of mesoporous hollow titanium dioxide particles, stirring for 30-60h, filtering and taking precipitate to obtain mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin;

(4) dispersing mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin in deionized water, adding 0.5-1 part of glutaraldehyde, heating to 35-40 ℃, reacting for 2-4h, and then filtering and drying to prepare ultraviolet light oxidation resistant titanium dioxide particles;

(5) placing the ultraviolet light oxidation preventing titanium dioxide particles in 1-2wt% of aminopropyltriethoxysilane aqueous solution for reaction for 12-18h to carry out silane modification;

(6) 100 parts of polypropylene and 1-5 parts of ultraviolet light oxidation prevention titanium dioxide particles are placed in a mixing roll to be mixed for 20-30min, and then the mixture is subjected to double-screw extrusion at the temperature of 200-220 ℃ to prepare the ultraviolet light oxidation prevention polypropylene composite material.

The polypropylene is thermoplastic synthetic resin with excellent performance, has chemical resistance, heat resistance, electric insulation, high-strength mechanical performance, good high-wear-resistance processing performance and the like, and is widely applied to electric auxiliary equipment, so that the polypropylene is used as a base material to prepare the shell. In the practical application process, the insulated wire connecting device is usually exposed to sunlight, so that the shell prepared from polypropylene is very easy to generate ultraviolet light oxidation after absorbing ultraviolet light, the ultraviolet light in the sunlight and oxygen in the air generate photooxidation reaction to cause the degradation of the polypropylene, and after the ultraviolet light oxidation, the mechanical property of the shell is reduced, the shell cannot bear the pressure at two ends of a broken wire, and simultaneously can be easily cracked, rainwater can enter the device from gaps to cause safety accidents.

Therefore, the ultraviolet light oxidation preventing titanium dioxide particles prepared by the method are mixed with polypropylene to improve the ultraviolet light oxidation preventing performance of the composite material. Firstly, the chitosan is modified, the chitosan has certain ultraviolet light absorption capacity, trimethoxy cinnamoyl chloride can be grafted on the chitosan through esterification reaction after the chitosan is improved by using trimethoxy cinnamoyl chloride, and the sulfonyl group has strong ultraviolet light absorption capacity, so the ultraviolet light absorption capacity of the chitosan is further improved through modification. Then, the invention takes titanium chloride as raw material to prepare mesoporous hollow titanium dioxide particles, then successfully loads modified chitosan into the mesoporous hollow silicon dioxide particles by mixing the modified chitosan and the mesoporous hollow titanium dioxide particles, then places the mesoporous hollow titanium dioxide particles loaded with the modified chitosan into glutaraldehyde, the modified deacetylated chitin is crosslinked by glutaraldehyde to form a reticular modified deacetylated chitin macromolecular compound, the reticular modified deacetylated chitin macromolecular compound is used as a core after being filtered and dried, the ultraviolet light oxidation preventing polypropylene composite material is prepared by taking mesoporous hollow titanium dioxide as shell layers and anti-ultraviolet light oxidation titanium dioxide particles with core-shell structures, and finally extruding and blending polypropylene and the anti-ultraviolet light oxidation titanium dioxide particles.

In the invention, the ultraviolet light oxidation preventing polypropylene composite material is prepared by blending the polypropylene and the ultraviolet light oxidation preventing titanium dioxide particles with the core-shell structure, because the modified deacetylated chitin has good ultraviolet light absorption performance, if the modified deacetylated chitin is directly mixed with the polypropylene, the prepared polypropylene composite material can have certain ultraviolet light absorption capacity and prevent the excessive ultraviolet light oxidation, but the modified deacetylated chitin is easy to dissolve out of the composite material along with the prolonging of the service time, the subsequent ultraviolet light oxidation preventing capacity of the composite material is influenced, and the chitin is directly blended with the polypropylene, so that the poor dispersibility of the chitin can also easily cause the non-uniformity of the ultraviolet light oxidation preventing capacity of different parts of the composite material. In the invention, the ultraviolet light oxidation prevention polypropylene composite material is prepared by blending the polypropylene with the ultraviolet light oxidation prevention titanium dioxide particles with the core-shell structure, in the application process, the shell titanium dioxide particles can pre-absorb ultraviolet light, then the reticular modified deacetylated chitin macromolecular compound of the core material can further absorb the ultraviolet light, the aging of the polypropylene composite material is prevented, meanwhile, the reticular modified deacetylated chitin macromolecular compound of the core material is a three-dimensional reticular compound, and after being coated by the mesoporous hollow titanium dioxide shell layer, the reticular modified deacetylated chitin can be prevented from being separated from the mesoporous hollow titanium dioxide, so that the dissolution of the reticular modified deacetylated chitin in the polypropylene composite material is prevented, the ultraviolet light oxidation prevention persistence of the reticular modified deacetylated chitin is enhanced, and meanwhile, after the mesoporous hollow titanium dioxide shell layer is modified by silane, the modified chitosan polymer composite material has good dispersibility in composite materials, so that the reticular modified chitosan polymer compound can be well dispersed in the composite materials, and the composite materials have stable performance.

Preferably, the concentration of acetic acid in the acetic acid/acetic anhydride mixed solution is 50-70 wt%.

Therefore, the invention has the following beneficial effects: the invention can realize the connection of broken wires and complete the repair of broken wires after inserting the broken wires into the two ends of the insulated wire connection device, thereby greatly reducing the time for repairing broken wires and improving the repair efficiency.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of an end construction of the present invention.

FIG. 3 is a schematic view of the tube clamping structure of the present invention.

FIG. 4 is a schematic view of the pin construction of the present invention.

Fig. 5 is a schematic diagram of the top cap structure of the present invention.

In the figure: the anti-skidding line of casing 1, interior wedge 2, double-layered pipe 21, antiskid line 211, pin 22, notch 23, socket 24, arc piece 25, cylinder 26, spring centre gripping mouth 27, fixed end 3, wire connecting portion 31, transfer portion 32, casing connecting portion 33, assembly breach 34, set nut 35, inclined plane 36, wire 4, spring 5, protection end 6, hood 61, hood antiskid line 62.

Detailed Description

The invention is further described with reference to specific embodiments.

Example (b): as shown in fig. 1-2, an insulated wire connection device includes a housing 1, an inner wedge 2, a fixed end 3, and a wire 4 made of steel-cored aluminum strand, where the housing 1 is a conical structure, a protection end 6 is embedded in an end portion of the housing 1 away from the fixed end 3, and a top cap 61 is disposed at one end of the protection end 6 located in the housing, and as shown in fig. 5, top cap anti-slip threads 62 are disposed on an outer wall of the top cap 61; the inner wedge 2 is in sliding fit with the inner part of the shell 1, the inner wedge 2 comprises two clamping pipes 21 which are arranged in a matched mode, the distance between the clamping pipes 21 is adjustable, the clamping pipes 21 are connected with the fixed end 3 through springs 5, the clamping pipes 21 are connected in a matched mode through pins 22, as shown in figure 3, anti-skid grains 211 are arranged on the inner wall of each clamping pipe 21, notches 23 and inserting openings 24 are symmetrically arranged on the cross section of each clamping pipe, as shown in figure 4, each pin 22 comprises an arc-shaped block 25 matched with each notch 23 and a cylinder 26 matched with each inserting opening 24, and a spring clamping opening 27 is formed in the outer wall of each pin 22; fixed end 3 one end is connected with casing 1, and the other end is inserted and is equipped with wire 4, wire 4 is located the one end and the spring 5 connection of fixed end 3, fixed end 3 includes wire connecting portion 31, transfer portion 32 and casing connecting portion 33, casing connecting portion 33 tip excircle is equipped with and is connected with casing 1 tip complex assembly breach 34, transfer portion 32 is the toper structure, is equipped with set nut 35 in, set nut 35 excircle is for 36 with transfer portion 32 matched with inclined plane.

When the invention is used, a broken wire can be inserted into the insulated wire connection device through the end part of the shell 1, the broken wire can be inserted into the inner wedge 2 in the broken wire insertion process, at the moment, the inner wedge 2 can compress the spring under the external acting force and slide along one side with a larger section of the conical shell, meanwhile, as the inner wedge 2 consists of the clamping tube 21 which is arranged in a matching way, the arc-shaped block 25 and the notch 23 on the pin of the clamping tube 21 can slide relatively, at the moment, the space between the clamping tubes 21 can be gradually enlarged until the broken wire can be inserted into the inner wedge 2, after the insertion is finished, as the spring is in a compression state, the outward thrust of the spring can lead the clamping tube 21 to firmly clamp the broken wire, meanwhile, as the outward thrust of the spring is applied to the broken wire, the inner wedge 2 can also firmly clamp the broken wire, and after the broken wire is inserted into two ends of the insulated wire connection device, the broken line connection can be realized, and the repair of the broken line is completed.

The shell is prepared from an ultraviolet-proof polypropylene oxide composite material, and the preparation of the ultraviolet-proof polypropylene oxide composite material comprises the following steps:

(1) adding 5 parts of deacetylated chitin into 300 parts of methanesulfonic acid, fully swelling, adding 30 parts of trimethoxy cinnamoyl chloride and 3 parts of triethylamine, reacting for 25 hours, precipitating with acetone, filtering, and drying the precipitate to prepare modified deacetylated chitin;

(2) mixing 5 parts of titanium chloride with 35 parts of acetic acid/acetic anhydride mixed solution (the concentration of acetic acid in the acetic acid/acetic anhydride mixed solution is 70 wt%), heating to 90 ℃, reacting to generate white precipitate, adding 10 parts of acetic acid/acetic anhydride mixed solution again, reacting until the acid is completely volatilized, filtering, taking the precipitate, placing the precipitate in 300 parts of ethanol, reacting for 12 hours at 200 ℃, washing and drying to prepare mesoporous hollow titanium dioxide particles;

(3) placing 5 parts of modified deacetylated chitin into 2000 parts of 2wt% acetic acid aqueous solution for dispersing and dissolving, then adding 8 parts of mesoporous hollow titanium dioxide particles, stirring for 30h, filtering and taking precipitate to obtain mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin;

(4) dispersing mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin in deionized water, adding 0.5 part of glutaraldehyde, heating to 35 ℃ for reaction for 2 hours, and then filtering and drying to prepare ultraviolet light oxidation resistant titanium dioxide particles;

(5) placing the ultraviolet light oxidation preventing titanium dioxide particles in 2wt% of aminopropyltriethoxysilane water solution for reaction for 18h to carry out silane modification;

(6) and (3) placing 100 parts of polypropylene and 5 parts of ultraviolet-proof oxidized titanium dioxide particles into a mixing roll for mixing for 20min, and then carrying out double-screw extrusion at 200 ℃ to prepare the ultraviolet-proof oxidized polypropylene composite material.

Example 2: the difference from the embodiment 1 is that the shell is prepared from the ultraviolet light oxidation prevention polypropylene composite material, and the preparation of the ultraviolet light oxidation prevention polypropylene composite material comprises the following steps:

(1) adding 7 parts of deacetylated chitin into 400 parts of methanesulfonic acid, fully swelling, adding 35 parts of trimethoxy cinnamoyl chloride and 5 parts of triethylamine, reacting for 30 hours, precipitating with acetone, filtering, and drying the precipitate to prepare modified deacetylated chitin;

(2) mixing 7 parts of titanium chloride with 45 parts of acetic acid/acetic anhydride mixed solution (the concentration of acetic acid in the acetic acid/acetic anhydride mixed solution is 60 wt%), heating to 100 ℃, reacting to generate white precipitate, adding 13 parts of acetic acid/acetic anhydride mixed solution again, reacting until the acid is completely volatilized, filtering to obtain the precipitate, placing the precipitate in 370 parts of ethanol, reacting at 205 ℃ for 9 hours, and then washing and drying to prepare mesoporous hollow titanium dioxide particles;

(3) placing 7 parts of modified deacetylated chitin in 2500 parts of 1.5 wt% acetic acid aqueous solution for dispersing and dissolving, then adding 90 parts of mesoporous hollow titanium dioxide particles, stirring for 45h, filtering to obtain precipitate, and obtaining mesoporous hollow titanium dioxide particles loaded with the modified deacetylated chitin;

(4) dispersing mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin in deionized water, adding 0.7 part of glutaraldehyde, heating to 38 ℃, reacting for 3 hours, and then filtering and drying to prepare ultraviolet light oxidation resistant titanium dioxide particles;

(5) placing the ultraviolet light oxidation resistant titanium dioxide particles in 1.5 wt% of aminopropyltriethoxysilane aqueous solution for reaction for 16h for silane modification;

(6) and (3) placing 100 parts of polypropylene and 3 parts of ultraviolet-proof oxidized titanium dioxide particles into a mixing roll for mixing for 25min, and then carrying out double-screw extrusion at 210 ℃ to prepare the ultraviolet-proof oxidized polypropylene composite material.

Example 3: the difference from the embodiment 1 is that the shell is prepared from the ultraviolet light oxidation prevention polypropylene composite material, and the preparation of the ultraviolet light oxidation prevention polypropylene composite material comprises the following steps:

(1) adding 10 parts of deacetylated chitin into 500 parts of methanesulfonic acid, fully swelling, adding 40 parts of trimethoxy cinnamoyl chloride and 6 parts of triethylamine, reacting for 35 hours, precipitating with acetone, filtering, and drying the precipitate to prepare modified deacetylated chitin;

(2) mixing 8 parts of titanium chloride with 55 parts of acetic acid/acetic anhydride mixed solution (the concentration of acetic acid in the acetic acid/acetic anhydride mixed solution is 50 wt%), heating to 110 ℃, reacting to generate white precipitate, adding 15 parts of acetic acid/acetic anhydride mixed solution again, reacting until the acid is completely volatilized, filtering, taking the precipitate, placing the precipitate in 450 parts of ethanol, reacting at 210 ℃ for 6 hours, and then washing and drying to prepare mesoporous hollow titanium dioxide particles;

(3) placing 10 parts of modified deacetylated chitin into 3000 parts of 1 wt% acetic acid aqueous solution for dispersing and dissolving, then adding 10 parts of mesoporous hollow titanium dioxide particles, stirring for 60h, filtering and taking precipitate to obtain mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin;

(4) dispersing mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin in deionized water, adding 1 part of glutaraldehyde, heating to 40 ℃, reacting for 2 hours, and then filtering and drying to prepare ultraviolet light oxidation resistant titanium dioxide particles;

(5) placing the ultraviolet light oxidation preventing titanium dioxide particles in 2wt% of aminopropyltriethoxysilane water solution for reaction for 12 hours to carry out silane modification;

(6) 100 parts of polypropylene and 1 part of ultraviolet light oxidation resistant titanium dioxide particles are placed in a mixing roll to be mixed for 25min, and then the mixture is subjected to double-screw extrusion at 210 ℃ to prepare the ultraviolet light oxidation resistant polypropylene composite material.

Comparative example 1:

the shell is prepared from an ultraviolet-proof polypropylene oxide composite material, and the preparation of the ultraviolet-proof polypropylene oxide composite material comprises the following steps:

(1) adding 5 parts of deacetylated chitin into 300 parts of methanesulfonic acid, fully swelling, adding 30 parts of trimethoxy cinnamoyl chloride and 3 parts of triethylamine, reacting for 25 hours, precipitating with acetone, filtering, and drying the precipitate to prepare modified deacetylated chitin;

(2) and (2) placing 100 parts of polypropylene and 5 parts of modified deacetylated chitin in a mixing roll for mixing for 20min, and then carrying out double-screw extrusion at 200 ℃ to prepare the ultraviolet light oxidation resistant polypropylene composite material.

Comparative example 2:

the shell is prepared from an ultraviolet-proof polypropylene oxide composite material, and the preparation of the ultraviolet-proof polypropylene oxide composite material comprises the following steps:

(1) mixing 5 parts of titanium chloride with 35 parts of acetic acid/acetic anhydride mixed solution (the concentration of acetic acid in the acetic acid/acetic anhydride mixed solution is 70 wt%), heating to 90 ℃, reacting to generate white precipitate, adding 10 parts of acetic acid/acetic anhydride mixed solution again, reacting until the acid is completely volatilized, filtering, taking the precipitate, placing the precipitate in 300 parts of ethanol, reacting for 12 hours at 200 ℃, washing and drying to prepare mesoporous hollow titanium dioxide particles;

(2) placing 5 parts of deacetylated chitin into 2000 parts of 2wt% acetic acid aqueous solution for dispersing and dissolving, then adding 8 parts of mesoporous hollow titanium dioxide particles, stirring for 30h, filtering to obtain precipitate, and obtaining mesoporous hollow titanium dioxide particles loaded with deacetylated chitin;

(3) dispersing mesoporous hollow titanium dioxide particles loaded with deacetylated chitin in deionized water, adding 0.5 part of glutaraldehyde, heating to 35 ℃ for reaction for 2 hours, and then filtering and drying to prepare ultraviolet light oxidation resistant titanium dioxide particles;

(4) placing the ultraviolet light oxidation preventing titanium dioxide particles in 2wt% of aminopropyltriethoxysilane water solution for reaction for 18h to carry out silane modification;

(5) and (3) placing 100 parts of polypropylene and 5 parts of ultraviolet-proof oxidized titanium dioxide particles into a mixing roll for mixing for 20min, and then carrying out double-screw extrusion at 200 ℃ to prepare the ultraviolet-proof oxidized polypropylene composite material.

Comparative example 3:

the shell is prepared from an ultraviolet-proof polypropylene oxide composite material, and the preparation of the ultraviolet-proof polypropylene oxide composite material comprises the following steps:

(1) adding 5 parts of deacetylated chitin into 300 parts of methanesulfonic acid, fully swelling, adding 30 parts of trimethoxy cinnamoyl chloride and 3 parts of triethylamine, reacting for 25 hours, precipitating with acetone, filtering, and drying the precipitate to prepare modified deacetylated chitin;

(2) mixing 5 parts of titanium chloride with 35 parts of acetic acid/acetic anhydride mixed solution (the concentration of acetic acid in the acetic acid/acetic anhydride mixed solution is 70 wt%), heating to 90 ℃, reacting to generate white precipitate, adding 10 parts of acetic acid/acetic anhydride mixed solution again, reacting until the acid is completely volatilized, filtering, taking the precipitate, placing the precipitate in 300 parts of ethanol, reacting for 12 hours at 200 ℃, washing and drying to prepare mesoporous hollow titanium dioxide particles;

(3) placing 5 parts of modified deacetylated chitin into 2000 parts of 2wt% acetic acid aqueous solution for dispersing and dissolving, then adding 8 parts of mesoporous hollow titanium dioxide particles, stirring for 30h, filtering and taking precipitate to obtain mesoporous hollow titanium dioxide particles loaded with modified deacetylated chitin;

(4) placing the ultraviolet light oxidation preventing titanium dioxide particles in 2wt% of aminopropyltriethoxysilane water solution for reaction for 18h to carry out silane modification;

(5) and (2) placing 100 parts of polypropylene and 5 parts of loaded modified deacetylated chitin mesoporous hollow titanium dioxide particles into a mixing roll for mixing for 20min, and then carrying out double-screw extrusion at 200 ℃ to prepare the ultraviolet light oxidation resistant polypropylene composite material.

Carrying out tensile strength performance tests on the composite materials prepared in the examples and the comparative examples before and after ultraviolet light aging, wherein the tensile strength performance test standard is GB/T1040.1-2018; the UV irradiation was carried out according to standard GB/T16422.3-1997 with a UV wavelength of 340nm, using exposure mode 1, i.e. the composite samples were exposed to radiation at 60 ℃ for 4h and then to non-radiation condensation at 50 ℃ for 4h, alternating with a total aging exposure of 500 h. The test data are shown in the table below.

According to the data, the tensile strength loss rate of the ultraviolet light oxidation preventing polypropylene composite material prepared by the invention is low after ultraviolet light oxidation, and the ultraviolet light oxidation preventing performance is good; the difference between the comparative example 1 and the example 1 is that the modified deacetylated chitin is directly blended with the polypropylene, and the modified deacetylated chitin is easily dissolved out of a matrix after being oxidized by ultraviolet light, so that the loss rate of tensile strength is high, and the ultraviolet light oxidation resistance is poor; the difference between the comparative example 2 and the example 1 is that the chitosan is not modified, so the ultraviolet light oxidation resistance is poor; the comparative example 3 is different from example 1 in that the modified chitosan is not crosslinked with glutaraldehyde after being loaded in the mesoporous hollow titanium dioxide particles, and thus the modified chitosan is easily dissolved out of the matrix after the matrix is aged to a certain degree, and cannot play a role in further preventing aging.

The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.