CN114479005A

CN114479005A - High-molecular flow-state cable pipe ditch plugging resin

Info

Publication number: CN114479005A
Application number: CN202210322464.9A
Authority: CN
Inventors: 徐浩泉; 宋轶
Original assignee: Sichuang Newell Guangzhou Technology Co ltd
Current assignee: Sichuang Newell Guangzhou Technology Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-05-13

Abstract

The invention discloses a high-molecular fluid-state cable pipe ditch plugging resin, which relates to the technical field of cable pipe ditch plugging and aims at solving the problems that the existing high-molecular fluid-state cable pipe ditch plugging material is difficult to meet construction requirements, poor in sealing performance, easy to age and poor in water and mouse resistance. The high-molecular fluid state cable pipe ditch plugging resin is subjected to rapid mixing reaction, expansion and hardening by adopting A, B two high-molecular compounds to form a high-hardness plugging surface, and has good waterproof, plugging, fireproof and rat-proof effects, very simple and convenient operation and long service life.

Description

High-molecular flow-state cable pipe ditch plugging resin

Technical Field

The invention relates to the technical field of cable pipe ditch plugging, in particular to high-molecular flow state cable pipe ditch plugging resin.

Background

The rat damage is one of natural enemies of electric power facilities, in the existing cable pipeline laying construction, pipeline port plugging materials need to be selected to avoid the rat damage, in reality, hole plugging of penetrations such as power cables and the like during wall penetration is mainly realized by using a large amount of fire-proof mud for plugging, the harm caused by the rat is reduced, the fire-proof mud is an engineering necessary product, the fire-proof mud is suitable for hole plugging of penetrations such as industrial and mining enterprises, high-rise buildings, shipbuilding, metallurgy, power generation, electric wires, cables and the like during wall penetration, so that the flame is prevented from spreading from the hole to an adjacent room in case of fire, although the application range of the fire-proof mud is wide, the rat is still a soft rib, the fire-proof mud of many projects is damaged by the rat, and the fire-proof mud of a transformer substation is bitten by the rat in serious conditions and enters a main control room to destroy equipment, and the consequence is unreasonable.

The fireproof mud is generally matched with inorganic fireproof blocking materials for use, when the blocking thickness reaches 150mm, the fire resistance limit is more than or equal to 3 hours, the fireproof mud is particularly applied to small cable through-holes, gaps and other special-shaped holes which are not suitable for blocking by fire-retardant blocking materials and places where cables are frequently replaced, but for large-area holes, the fireproof mud is soft and cannot be shaped, and the construction requirements are hardly met, so that a construction method matched with the inorganic blocking materials is required for construction of the large holes, and under the condition that a large number of cable bundles exist, the fireproof mud hardly blocks gaps among cables, and the gaps among the cables become dead corners for blocking small animals, and the fireproof mud has the product material characteristics: the cable is easy to age and fall off, and the maintenance and capacity increase of the cable are influenced; and water and sludge are easy to enter, so that the waterproof and rat-proof functions of plugging are seriously influenced by the characteristics of engineering application.

Through engineering practical application, expose many obvious weak points of fire prevention mud, let the effect that little animal was prevented in the waterproof shutoff of fire prevention of cable significantly discount, have to maintain repeatedly, waste time and energy, must not repay, the comprehensive analysis, no matter the conventional operation method is considered from economic nature angle, power supply reliability angle and construction maintenance personnel personal safety angle, all can not satisfy modern electric wire netting safety far away, stable, the needs of economic operation management, need develop a safe, economic, high-efficient, practical novel material. Therefore, in order to solve such problems, we propose a polymer fluid cable trench plugging resin.

Disclosure of Invention

The invention provides a high-molecular flow-state cable pipe ditch plugging resin, which solves the problems that the existing high-molecular flow-state cable pipe ditch plugging material is difficult to meet the construction requirement, has poor sealing property, is easy to age and has poor water resistance and rat resistance.

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

the high-molecular fluid cable pipe ditch plugging resin comprises a component A, a component B and an auxiliary material, wherein the component A is hard high-molecular resin, the component B is a rat repelling compound component, the base material adopts isocrude acid ester, the rat repelling compound comprises a foaming agent, a stabilizer, a catalyst, a rat repelling agent and other auxiliaries, and the auxiliary material is iron wire cotton as a filling auxiliary.

In a preferred embodiment of the present invention, the isocyanate for hard foam of the isocrude acid ester is polymethylene polyphenyl polyisocyanate, and the polymethylene polyphenyl polyisocyanate is composed of a mixture of diphenylmethane diisocyanate and multifunctional polymeric MDI.

As a preferred technical scheme of the invention, the foaming agent is a pentane foaming agent.

In a preferred embodiment of the present invention, the stabilizer is a Si-c type foam stabilizer.

In a preferred embodiment of the present invention, the catalyst is a tertiary amine catalyst comprising two or more of N, N-dimethylcyclohexylamine, tetramethylethylenediamine, tetramethylbutanediamine, N, V-dimethylpiperazine, triethylenediamine, triethanolamine, dimethylethanolamine, dimethyl-para-amine, N-ethylmorphinir, pentamethyldiethylenetriamine, and triethylamine.

As a preferred technical scheme of the invention, the rat repelling agent is 1,7, 7-trimethylbicyclo [2.2.1] heptane-2-ketone.

As a preferable technical scheme of the invention, the other auxiliary agents comprise a flame retardant, a pore opening agent, a fuming inhibitor, an anti-aging agent, a mildew preventive, a toughening agent and a reinforcing agent.

As a preferred technical scheme of the invention, the auxiliary material is iron wool, and the iron wool forms an auxiliary surface to increase the physical characteristics of the plugging surface.

A method for using high-molecular fluid cable duct plugging resin adopts a liquid polymerization reaction mode, and the using steps of the resin are as follows:

s1, reacting the raw materials of the component A to prepare chemical substances of the component A;

s2, mixing the raw materials of the component B to prepare chemical substances of the component B;

s3, filling the chemical substances of the component A and the component B by using an AB pipe container to obtain a raw material product of the macromolecular fluid cable pipe ditch plugging resin;

s4, when in use, the product in the AB pipe container is extruded, the A component and the B component chemical substances in the AB pipe container are output through the reaction pipe, and the A component and the B component chemical substances are mixed and reacted in the reaction pipe, and then are extruded out and continuously reacted and cured to form the plugging surface.

In a preferred embodiment of the present invention, when the resin is used in step S4, iron wool is used as a construction adhesive surface material during the construction process in order to increase the adhesive force.

The invention has the beneficial effects that:

1. the high-molecular fluid cable pipe ditch plugging resin is generated by mixing and reacting A, B two chemical substances and a rat repelling compound group, a container with an AB pipe is used for filling, and during extrusion, the high-molecular fluid cable pipe ditch plugging resin is subjected to mixing and reacting through a reaction pipe, is extruded out and then continues to react and solidify to generate a high-hardness plugging surface, can achieve the effects of tight thread joint waterproof plugging and can also achieve the purposes of fire prevention and rat prevention, the operation is very simple and convenient, the service life is long, and the high-molecular fluid cable pipe ditch plugging resin has a wide application scene in the power industry.

2. The high-molecular flow-state cable pipe ditch plugging resin contains a rat repelling material, can effectively repel rats and small animals, has certain fluidity, can be quickly solidified so as to facilitate construction, has the solidification time of less than 2 minutes, has the complete hardening time of not more than 1 hour, and can expand by 5-10 times so as to effectively plug various fine gaps in the construction process, ensures that the plugged cavity has good sealing property, has certain adhesion capacity, can construct in a vertical plane, has the shrinkage rate of less than 5 percent after the construction is finished, and has long service life.

3. Construction convenience is simple, does not need extra power, pneumatic tool requirement, and engineering time and curing time are short, are applicable to electrical power rush-repair, can normal use at the pipeline of infiltration, the stable performance, and combined material can adapt to various pipeline environment, and the suitability is strong, can the various spaces that are difficult to the shutoff of shutoff, and the material stable performance, product long service life, the leakproofness is strong, can effectually prevent that water, silt, debris, toy etc. from getting into the pipeline, the protection cable.

Drawings

FIG. 1 is a schematic diagram showing the effect of temperature on the reaction rate constant of a compound and P-XDI in the present invention.

FIG. 2 is a schematic representation of the effect of temperature on the extent of reaction of MDI with PDA in the present invention.

Reference numbers in the figures: 1. polyethylene glycol adipate glycol; 2. MOCA; 3. the diphenylglands; 4. 1, 4-phenylene dibutylaminomethyl formate.

Detailed Description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

Example 1

The isocyanate used for the rigid foam of the isocrude ester is mainly polymethylene polyphenyl polyisocyanate, the polymethylene polyphenyl polyisocyanate is formed by a mixture of diphenylmethane diisocyanate and polymeric MDI with multiple functionality, wherein different MDI contents, different 2, 4-isomer contents and different 4, 4-isomer contents influence the reaction performance, viscosity, functionality and other indexes of the product, the average functionality of polymethylene polyphenyl polyisocyanate series products is within the range of 2.5-3.0, the polymethylene polyphenyl polyisocyanates with different functionalities can be used in different occasions, if the rigid foam is required to be good in material fluidity, low functionality and low viscosity products can be used, along with the increase of the functionality, the viscosity of the polymethylene polyphenyl polyisocyanate is also increased, the fluidity is reduced during the foaming, and the foam curing time is shortened, the generated hard foam has better thermal stability and improved compression strength.

The foaming agent is selected from a pentane foaming agent, the heating value of the hard polymer resin in the mixing process is large, a physical foaming agent is generally needed, the initial foaming agent is trichlorofluoromethane, but CFC is an ozone-depleting substance which destroys the atmospheric ozone layer, so in the project, the pentane foaming agent is used for the hard polymer resin.

The stabilizer is a Si-C type foam stabilizer, the foam stabilizer used for the foam stabilizer of a polyurethane hard foam formula is generally a block copolymer burnt by polydimethylsiloxane and polyoxyalkylene, and because the raw materials are premixed into a two-component combined material for use in practical application, a silicon surfactant containing a Si-0-C structure can be hydrolyzed and loses efficacy after long-term action with water in the formula, the foam stabilizer of the existing product is a Si-C type, and the silicon stabilizer applied to the hard foam has the functions of foam stabilization and homogenization, also improves the closed-cell rate of cells and forms a cavity for accommodating a rat repelling material.

The catalyst is a tertiary amine catalyst, two or more catalysts are often used in the production process of the hard polymer resin to adjust the balance between the chain growth rate and the crosslinking rate, the catalyst in the formula of the hard polymer resin is mainly tertiary amine, an organic tin catalyst can be used in a special formula, and the common tertiary amine catalyst comprises: n, N-dimethylcyclohexylamine, tetramethylethylenediamine, tetramethylbutanediamine, N, V-dimethylpiperazine, triethylenediamine, triethanolamine and dimethylethanolamine, dimethyl-lung-amine, N-ethylmorphinil, pentamethyldiethylenetriamine and triethylamine, and the like.

The rodenticide is prepared from 1,7, 7-trimethylbicyclo [2.2.1] heptane-2-ketone and 1,7, 7-trimethylbicyclo [2.2.1] heptane-2-ketone, which are terpenoid organic compounds, have a chemical formula of C10H16O, are white or transparent waxy solids at room temperature, have strong pungent odor, can be used for repelling mice and insects, are mixed in hard high polymer resin, are molded and retained by resin and are retained in small bubbles formed by the resin, and play a role in repelling small animals for a long time.

According to different purposes and requirements of the hard polymer resin product, auxiliary agents can be added into the formula, and the other auxiliary agents include but are not limited to flame retardants, pore opening agents, smoke inhibitors, anti-aging agents, mildew inhibitors, toughening agents and reinforcing agents.

The auxiliary material is iron silk cotton, the iron silk cotton forms an auxiliary surface, the physical characteristics of the plugging surface are improved, the number 0-4 iron silk cotton can be used according to the requirement, and the number 4 iron silk cotton is recommended.

Example 2

The hard polymer resin has the characteristics of high hardness, light weight, high specific strength, excellent chemical resistance, easy brittle fracture under the action of external force and the like, closed-cell bubbles formed inside the product after curing can contain a rat repelling compound to form gas, the density of the hard polymer resin can be adjusted within a large range, can be as low as 10kg/m3 and as high as about 1100kg/m3 of an almost solid body, can reach Shore hardness of 20-35, and can meet certain application requirements.

The catalytic mechanism of the isocyanate reaction:

one of the hard polymer resin raw materials is isocyanate, and the catalytic mechanism of the reaction of the isocyanate and the hydroxyl compound is generally considered to be that the isocyanate or the hydroxyl compound firstly generates an unstable complex with a catalyst and then generates a reaction to generate polyurethane;

one recognized catalytic mechanism is based on the attack of isocyanates by nucleophilic catalysts to form intermediate complexes which are then reacted with hydroxyl compounds.

Effect of the acid-base of the Tertiary amine catalyst on the reactivity:

in the reaction of hard polymer resins, acid catalysts such as benzoyl chloride, inorganic acids and organic acids are generally rarely used, and have a low catalytic effect on the formation reaction of carbamates and allophanates, but it is important that they inhibit the biuret formation reaction and thus inhibit the crosslinking reaction, and if a trace amount of alkali in the hard polymer resin is not removed, such as KOH for ring-opening polymerization, the alkali metal compound catalyzes the crosslinking side reaction to generate gel when reacting with diisocyanate, so that acid can be added for neutralization, and if the acid is slightly excessive, the crosslinking reaction is inhibited, so that the prepolymer can be stored for a long period of time;

the tertiary amine catalyst has the influence on the reaction of isocyanate and hydroxyl compound, and has the factors of steric hindrance effect and the like besides the alkaline degree, generally speaking, the tertiary amine catalyst has large alkalinity and small steric hindrance, the catalyst has strong catalytic capability, the influence of the tertiary amine on the catalytic activity of the reaction of water and isocyanate is larger than the catalytic activity of the reaction of hydroxyl and isocyanate, the catalyst is mainly used for preparing hard polymer resin foam, among all the tertiary amine catalysts, triethylenediamine is a catalyst of a specific structure, since it is a heterocyclic compound, and the N atom of tertiary amine is not hindered, therefore, the catalyst has stronger catalytic performance to foaming reaction and gel reaction, is one of the commonly used catalysts for hard high molecular resin, can also be used for preparing polyurethane adhesives, elastomers and the like, and is estimated to have strong catalytic performance in a water-alcohol mixed system, it has 80% of catalytic ability to hydroxyl and 20% of catalytic ability to water, and has catalytic performance similar to that of organic metal compound.

Synergistic effect of catalysis:

the NCO activity of different catalysts is different, the catalytic activity is also related to different reactant concentrations, reaction temperature and other conditions, as can be seen from the data in Table 1, the chemical difference of different catalysts to the reaction of diisocyanate and carignane polyol is large, for example, the catalytic action of triethylene diamine to the reaction of aromatic isocyanate and hydroxyl is much higher than that of aliphatic HDI and araliphatic isocyanate XDI, and research shows that the reaction rate is accelerated when the concentration of the catalyst is increased; the two different catalysts are combined, and the catalytic activity is much stronger than that of a single catalyst (as shown in a table 2);

TABLE 1 Effect of different catalysts on NCO Activity

Catalyst and process for preparing same	Mass fraction/%	Relative activity
			Is free of		1
Tetramethyl butanediamine	0.1	56
			Triethylene diamine	0.1	130
Triethylene diamine	0.2	260
			Triethylene diamine	0.3	330

TABLE 2 Effect of Single and two different catalysts on NCO Activity

Catalyst and process for preparing same	Mass fraction/%	Relative activity
			Stannous octoate	0.1	540
Stannous octoate	0.3	3500
			Dibutyl tin dilaurate	0.1	210
Dibutyl tin dilaurate	0.5	670
			Dibutyltin dilaurate + triethylenediamine	0.1+0.2	1000
Stannous octoate + triethylenediamine	0.1+0.5	1510
			Stannous octoate + triethylene diamine	0.3+0.3	4250

As can be seen from Table 2, the tertiary amine catalyst also has a relatively high catalytic activity for the reaction of NCO and OH, but the organotin catalyst has a relatively high catalytic activity, and the two catalysts are used in combination to enhance the catalytic ability by times, which is a synergistic effect of the catalysts.

Effect of temperature on reaction rate:

the reaction temperature is an important control factor in the preparation of hard polymer resin, generally speaking, as the reaction temperature increases, the reaction rate of isocyanate and various active hydrogen compounds increases, and the reaction rate of isocyanate self-polymerization also increases under the action of special catalyst, but when the reaction temperature is 130-150 ℃, the rate constants of each reaction are similar, as shown in fig. 1, the relationship between the reaction rate constants and the temperature of p-methylene benzene diisocyanate and hydroxyl compound, arylamine, urea, carbamate compound, in fig. 1: 1. polyethylene glycol adipate glycol; 2. MOCA; 3. the diphenylglands; 4. 1, 4-phenylene dibutylaminomethyl formate; FIG. 2 shows the effect of temperature on the extent of reaction of MDI with polyethylene adipate diol.

Effect of solvent on reaction rate:

the solution polymerization method is usually adopted for preparing the hard polymer resin, the variety of the solvent has a great influence on the reaction rate, table 3 shows the influence of different solvents on the reaction rate constant of the benzisomide ester-hydroxy compound,

TABLE 3 Effect of different solvents on the reaction Rate constants of benzisominate-hydroxy Compounds

Hydroxy compounds	Solvent(s)	K/[* L/(mol.s)]
			Methanol	Toluene	1.2
Methanol	Ethyl acetate	0.45
			Methanol	Methyl ethyl ketone	0.05
Methanol	Dioxane (dioxane)	0.03
			Butanol	Toluene	1.4
Butanol	Methyl ethyl ketone	0.05

Note: isocyanate is 0.25 mol; the molar ratio of NCO to 0H is 1 or 2; the reaction temperature was 20 ℃.

As can be seen from Table 3, the more polar the solvent, the slower the reaction of isocyanate with hydroxyl group, because the solvent molecule has a large polarity and can form hydrogen bond with hydroxyl group to associate, which makes the reaction slow, therefore, in the preparation of solvent-based products, a hydrocarbon solvent such as toluene is used, the reaction rate is faster than that of ester and ketone solvents, diisocyanate and oligomer diol liquid are generally subjected to bulk polymerization under the condition of heating, when the viscosity is increased to a certain degree and stirring is difficult, a proper amount of urethane solvent is added for dilution, the viscosity is reduced so as to continue the uniform reaction, and the method is generally adopted for ensuring that the resin has higher molecular weight, moreover, compared with the solution polymerization method, the method can shorten the reaction time, reduce the influence of the solvent on the reaction as much as possible, indirectly influence the increase of the molecular weight due to the influence of the solvent on the reaction rate, and increase the chance of generating side reactions;

in a specific reaction system, a proper catalytic system is selected according to the types of the reaction and the product, the equivalent activities of different catalysts in relevant information and practical application.

Example 3

A method for using high-molecular fluid state cable pipe ditch plugging resin, the reaction of the resin adopts the reaction mode of liquid polymerization, so that the product has good fluidity, the gap between cables can be plugged well, and the fluidity also brings inconvenience to the surface formation in the construction, therefore, iron wire cotton is added as an auxiliary material, the auxiliary surface of the material can be formed, and the physical property of the plugging surface is effectively enhanced; and the using steps of the resin are as follows:

s4, when in use, the product in the AB pipe container is extruded to output the A component and the B component chemical substances in the AB pipe container through the reaction pipe, the A component and the B component chemical substances are mixed and reacted in the reaction pipe, the mixture is extruded and then continuously reacted and cured to generate a plugging surface, and in order to increase the adhesive force of the plugging surface, iron wire cotton is used as a construction adhesive surface material in the construction process.

Selecting tools and auxiliary materials:

the hard polymer resin is generated by mixing and reacting A, B two chemical substances and a rat repelling compound group, a container passing through an AB pipe is used for filling, the hard polymer resin is mixed and reacted through a reaction pipe during extrusion, and the hard polymer resin is continuously reacted and solidified after being extruded to generate a plugging surface.

The packaged AB rubber cylinder is in specifications of 50ml, 100ml, 400ml and the like, the containers in the former two specifications adopt a manual extrusion construction tool, and 400ml can use an electric extrusion tool.

Because the product has better fluidity, although the adhesive force of the product can be adjusted, the vertical face construction can be carried out, in order to better form a blocking adhesive surface, iron wire cotton can be used as a construction adhesive surface material in the construction, 0-4 iron wire cotton can be respectively used according to the requirements, and 4 iron wire cotton is recommended.

The characteristics of the high-molecular flow state cable pipe ditch plugging resin material are as follows:

the product contains mouse repellent materials, and can effectively repel mice and small animals;

the standard Shore hardness is 20-35, and the product is easy to crack under the action of external force;

the product has certain fluidity;

the product can be quickly solidified so as to facilitate construction, the solidification time is less than 2 minutes, and the complete hardening time is not more than 1 hour;

the expansion is 5 to 10 times, so that various fine gaps can be effectively blocked in the construction process, and the blocked cavities have good sealing property;

the adhesive has certain adhesive capacity and can be constructed in a vertical surface;

after the construction is finished, the shrinkage rate is less than 5%;

the service life of the product is not less than 5-10 years.

In conclusion, the resin product provided by the invention can better solve the actual problem of plugging the cable duct through configuration and test, and has the following advantages in use through practical engineering application and product use tracking for a period of time:

the construction is convenient and simple: extra power supply and pneumatic tool requirements are not needed, and the construction time and the curing time are short;

the method is suitable for electric power rush-repair: the water seepage pipeline can be normally used;

the performance is stable: the composite material can adapt to various pipeline environments;

the applicability is strong: various gaps which are difficult to block can be blocked;

the service life is longer: the material performance is stable, and the design service life is 10 years;

the leakproofness is strong: can effectively prevent water, silt, sundries, small animals and the like from entering the pipeline and protect the cable.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The high-molecular fluid cable pipe ditch plugging resin comprises a component A, a component B and an auxiliary material, and is characterized in that the component A is hard high-molecular resin, the component B is a rat repelling compound component, the base material adopts isocrude acid ester, the rat repelling compound comprises a foaming agent, a stabilizing agent, a catalyst, a rat repelling agent and other auxiliaries, and the auxiliary material is iron wire cotton as a filling auxiliary.

2. The polymeric cable duct plugging resin according to claim 1, wherein said isocyanate for hard bubble of isocratic acid ester is polymethylene polyphenyl polyisocyanate, and the polymethylene polyphenyl polyisocyanate is a mixture of diphenylmethane diisocyanate and multifunctional polymeric MDI.

3. The high molecular weight fluid cable trench plugging resin of claim 1, wherein the blowing agent is a pentane blowing agent.

4. The polymer fluid cable trench plugging resin as claimed in claim 1, wherein said stabilizer is a Si-c type foam stabilizer.

5. The polymeric fluid cable trench plugging resin of claim 1, wherein the catalyst is a tertiary amine catalyst comprising two or more of N, N-dimethylcyclohexylamine, tetramethylethylenediamine, tetramethylbutanediamine, N, V-dimethylpiperazine, triethylenediamine, triethanolamine, dimethylethanolamine, dimethyl-para-amine, N-ethylmorphinil, pentamethyldiethylenetriamine, and triethylamine.

6. The high molecular weight fluid cable trench plugging resin of claim 1, wherein the rodenticide is 1,7, 7-trimethylbicyclo [2.2.1] heptan-2-one.

7. The high molecular weight fluid state cable trench plugging resin as claimed in claim 1, wherein the other auxiliary agents comprise flame retardant, pore opening agent, fuming inhibitor, anti-aging agent, anti-mold agent, toughening agent and reinforcing agent.

8. The high molecular weight fluid state cable duct plugging resin as claimed in claim 1, wherein said auxiliary material is selected from iron wool, and the iron wool forms an auxiliary surface to increase physical properties of the plugging surface.

9. A method for using high polymer fluid state cable duct plugging resin, which is based on any one of the above claims 1 to 8, and is characterized in that the resin adopts a liquid polymerization reaction mode, and the steps of using the resin are as follows:

10. The method of claim 9, wherein in step S4, iron wool is used as a construction adhesive material to increase the adhesive force of the resin.