CN111718511B - Special function electric power protection tube - Google Patents

Abstract

The invention relates to a special function power protection tube and a preparation method thereof, wherein a metal layer, a metal porous layer containing an odorant and a hole sealing layer are deposited on the power protection tube, the odorant is sealed in small metal pits, the metal layer can provide an isolation effect, and a double-safety function is adopted, so that the effect of effectively repelling rats and ants is realized, the effect is lasting, the operation safety of a power cable is maintained, and the economic cost is saved.

Description

Special function electric power protection tube

Technical Field

The application relates to a power protection tube with special functions, in particular to a power protection tube capable of preventing corrosion of rats, termites and the like.

Background

Most of the outer coating layers of the communication cables are plastic substances, such as PVC/PE and the like, and are buried underground and often bitten by mice and termites, so that communication interruption and possible fire disasters are caused, and therefore the prevention of the mice and termites from biting by the cables is a practical problem, economic losses are caused due to the fact that the mice and termites bite every year, and time and labor are wasted in detection and replacement.

So far, a great deal of research has been carried out by scientific and technical personnel and engineering personnel at home and abroad, and several methods which are not common are adopted for the research: 1) chemical protection against rodents: the method of adding the repellent substance into the optical cable sheath material is adopted to prevent the optical cable from being bitten and damaged by squirrels, and the repellent substance is mainly a strong irritant chemical substance such as pungent taste essence. Such as chinese patents CN2019214746186 and CN201811477346.5, however, the aforesaid methods usually mix the pungent taste agent with the polymer substrate, and although the rat and ant erosion is avoided to some extent, the odor agent is easy to diffuse with the polymer substrate, and the efficacy is reduced; thus, Japanese patent JP2000113736A discloses ratproof polyvinyl chloride sheathed cables, wherein two ratproof vinyl chloride resin compositions are obtained by changing the ratio of microencapsulated cycloheximide to vinyl chloride resin. The sheath is divided into an inner layer and an outer layer, the inner layer sheath is prepared from vinyl chloride resin and a larger amount of microencapsulated cycloheximide, and the outer layer sheath is prepared from vinyl chloride resin and a smaller amount of microencapsulated cycloheximide. However, the microencapsulation can be improved further to a certain extent, but diffusion into the capsule matrix is still unavoidable, which can also lead to reduced efficacy. 2) Physical protection against rodents: physical protection against rodents means that the optical cable adopts the unable destructible material of rodent to block, guarantees that after the rodent damage takes place, and the protection of inlayer does not have any harm, prevents the destruction of squirrel generally through designing the optical cable structure and selecting suitable material, divide into metal class isolation and nonmetal class isolation. However, although the use of tensile steel wire mesh, as in chinese patent CN201620763426.7, can prevent rats to some extent, it is not sufficiently effective for protection against termites, termites can bite further through the mesh, and rats can also penetrate through the mesh, even biting or grinding through the wire mesh, so that complete reassurance against their attack is still not achieved, and outer sheaths of polymeric material such as annealed steel wire layers, as also used in US patent US20080247717a1, still suffer from the above-mentioned problems.

In recent years, the demand of special functional cables is increasing day by day, on one hand, the industry enterprise evaluates that although the adopted cost of the cable is higher than that of a common cable, the rat and ant corrosion cost, the manual replacement cost and the communication information loss of the common cable are combined, and the rat and ant prevention special functional cable protective sleeve still has higher market competitiveness.

The invention is especially provided in view of the shortcomings and shortcomings of the measures for preventing rats and ants in various cable pipelines.

Disclosure of Invention

Aiming at the technical problems existing in the prior art, the invention aims to solve the technical problems that: how to provide a power cable protection tube and power cable that can improve current protection against rodents, can prevent ant more effectively again.

Based on the prior art, the inventor finds out through continuous experiments by researching various existing rat-proof technical measures, and further adopts the following technical scheme for solving the technical problems:

the first aspect of the invention provides a method for preparing a special functional power protection tube, which comprises a high polymer base material tube, wherein the base material tube is preferably PVC or PE, particularly preferably PVC, and at least one functional layer is arranged outside the base material tube, and the functional layer is prepared by the following steps:

(1) immersing a base material pipe into a first solution tank, and continuously impacting the surface of the pipe by using air, wherein the solution in the first solution tank is NaOH (30-50g/L), sodium phosphate 15-70g/L, Na2CO3(30-40g/L), OP-102-5g/L, and the solution temperature is 60-70 ℃.

(2) And (2) passing the pipe processed in the step (1) through a clear water tank, and then introducing the pipe into a second solution tank, wherein the solution in the tank comprises the following components: chromic anhydride (15-20g/L), concentrated sulfuric acid (200-300mL/L), the temperature of the solution is 40-50 ℃, and air is used for continuously impacting the surface of the pipe.

(3) And (3) passing the pipe processed in the step (2) through a clear water tank, then introducing the pipe into a third solution tank, wherein the solution components comprise stannous chloride (5-15g/L), concentrated hydrochloric acid (80-90ml/L) and nano tin (0.1-2 g/L), processing at room temperature for 10-15min, and then passing through the clear water tank at the speed of 1-3 m/min.

(4) And (4) enabling the pipe processed in the step (3) to pass through a fourth solution tank, wherein the fourth solution tank comprises: soaking palladium chloride (0.2-0.5g/L) and concentrated hydrochloric acid (3-4 mL/L) at room temperature for 3-7 min.

(5) And (5) enabling the pipe treated in the step (4) to pass through a clear water tank at the speed of 1-3m/min, and then introducing the pipe into a fifth solution tank, wherein the solution comprises the following components: nickel sulfate (60-80g/l), sodium acetate (50-200g/l), NaH2PO2(30-50g/l), treating at 50-70 deg.C for 0.5-1min to obtain a nickel metal layer.

(6) And (5) passing the pipe processed in the step (5) through a clear water tank and then introducing the pipe into a sixth solution tank, wherein the solution tank is polyacrylic acid emulsion, and evaporating to obtain the pipe with the gap polyacrylic acid microspheres attached.

(7) And (3) introducing the pipe processed in the step (6) into a seventh solution tank, connecting the pipe with the cathode of the conductive roller, wherein the solution in the seventh solution tank is as follows: 30-50g/L nickel sulfamate, 40-80g/L nickel chloride and 30-60g/L boric acid, wherein nickel metal is deposited among gaps of the polyacrylic acid microspheres.

(8) Directly introducing the pipe processed in the step 7 into an eighth solution tank without cleaning, wherein the solution tank is a dimethyl sulfoxide solution until a porous nickel metal layer is obtained;

(9) and (4) cleaning the pipe obtained by the treatment in the step (8), and introducing the pipe into a ninth solution tank, wherein the solution is a dispersion liquid containing an odorant, and the dipping time is 10min-1 h.

(10) And drying the pipe obtained in the previous step and sealing the hole by using high molecular paint or varnish.

The second aspect of the present invention is the use of a pipe material for preventing damage to power cables by rodents, ants and insects, preferably rodents and ants, and particularly preferably rodents.

In another embodiment, the invention is a power cable protection tube comprising an odorant layer.

Another aspect of the invention is a method for protecting a cable, consisting in sheathing an electric power cable in a protective tube according to claim 3.

The invention also comprises another embodiment of the power cable, which comprises a cable and a protection pipe sleeved on the power cable.

The odorant is characterized by comprising camphor and capsaicin.

Compared with the prior art, the invention has the following remarkable advantages:

the odor agent in the prior art is usually mixed with a high polymer material such as PVC \ PE and the like to be compatible with a pipe, so that the concentration of the odor agent is weakened, the efficacy is reduced, and the odor agent is inevitably further diffused to peripheral high polymer base materials along with the long time, so that the concentration is further reduced; on the other hand, the surrounding of the odorant is made of high molecular plastic materials, so that the potential risk caused by the biting of rats and ants on the pipe or cable cortex cannot be completely prevented, and further, the rats and ants have strong adaptability, slowly adapt to weakened odor gradually, and cannot effectively realize the repelling effect for a long time; according to the invention, the odorant is impregnated in the porous metal layer, the porous metal layer is similar to a honeycomb structure, the odorant can be effectively sealed in the tiny units, the durability of the odorant is kept, and meanwhile, the bottom metal layer is matched with the porous metal layer, so that the damage of the metal to the metal is prevented, and compared with the metal mesh in the prior art, the metal mesh has no pores completely, and the possibility that the rat and the ant bite further inwards through the gaps of the pores is prevented.

Detailed Description

Example 1

A preparation method of a power cable protection pipe with functions of reinforcing rat and termite resistance comprises the following specific steps:

(1) immersing a PVC pipe for protecting a cable into a first solution tank, wherein the solution in the first solution tank is NaOH30g/L, sodium phosphate 70g/L, sodium carbonate 30g/L and OP-102g/L, the solution temperature is 60 ℃, the time is 30s, air nozzles are arranged in the solution tank, the air nozzles are uniformly distributed around the PVC pipe in operation, the air pressure is utilized and the solution is carried to continuously impact the surface of the pipe, the cleaning effect is enhanced, and the cleaning time is shortened;

(2) and (2) passing the pipe processed in the step (1) through a clear water tank, and then introducing the pipe into a second solution tank, wherein the solution in the tank comprises the following components: the method comprises the following steps that (1) chromic anhydride 15g/L and concentrated sulfuric acid 300mL/L are adopted, the solution temperature is 40 ℃, the time is 10min, air nozzles are arranged in a solution tank, the air nozzles are uniformly distributed in a surrounding mode in the operation aspect of a PVC pipe, the surface of the pipe is continuously impacted by air pressure and carried solution, the cleaning effect is enhanced, and the cleaning time is shortened;

(3) the pipe processed in the step 2 passes through a clear water tank, and then is introduced into a third solution tank, wherein the solution comprises 5g/L of stannous chloride, 90ml/L of concentrated hydrochloric acid and 2g/L of nano tin powder, and after the pipe is processed at room temperature for 10min, the pipe is taken out of the tank and runs for 1min in the air, and then the pipe slowly passes through the clear water tank at the speed of 1 m/min;

(4) and (3) passing the pipe processed in the step (3) through a fourth solution tank, wherein the fourth solution tank comprises the following solutions: soaking 0.2g/L palladium chloride and 4mL/L concentrated hydrochloric acid at normal temperature for 3 min;

(5) and (3) after the pipe processed in the step (4) is taken out of the air of the tank and runs for 1min, the pipe passes through a clear water tank at the speed of 1m/min and then is introduced into a fifth solution tank, and the solution comprises the following components: 60g/l of nickel sulfate, 200g/l of sodium acetate and 230g/l of NaH2PO, wherein the treatment temperature is 50 ℃ and the treatment time is 1min, and a nickel metal layer is obtained.

(6) The pipe processed in the step 5 passes through a clear water tank and then is introduced into a sixth solution tank, the solution tank is polyacrylic emulsion, and the pipe with the gap polyacrylic microspheres attached is obtained after evaporation treatment;

(7) and (3) introducing the pipe processed in the step (6) into a seventh solution tank, connecting the pipe with the cathode of the conductive roller, wherein the solution in the seventh solution tank is as follows: 30g/L nickel sulfamate, 80g/L nickel chloride and 30g/L boric acid, wherein the time is 20min, the temperature is 50 ℃, the current density is 2A/dm2, and nickel metal is deposited among gaps of the polyacrylic acid microspheres;

(8) directly introducing the pipe processed in the step 7 into an eighth solution tank without cleaning, wherein the solution tank is a dimethyl sulfoxide solution until a porous nickel metal layer is obtained;

(9) cleaning the pipe processed in the step 8, and introducing the pipe into a ninth solution tank, wherein the solution is a dispersion liquid containing capsaicin extract, and the soaking time is 1 hour;

(10) and drying the pipe obtained in the previous step and sealing the hole by using a polypropylene emulsion coating.

See table 1 for specific parameters of examples 2-3, the remainder of the example 1.

Comparative experiment:

comparative example 1: the PVC odor agent layer containing capsaicin is directly compounded outside the PVC pipe, and then the protective high molecular paint is coated outside the PVC pipe, wherein the high molecular paint is the same as that in the example 1.

Comparative example 2: the PVC odor agent layer containing capsaicin and the metal net layer are directly compounded outside the PVC pipe, and then the protective high polymer coating is coated outside the PVC pipe, wherein the high polymer coating is the same as that in the embodiment 1.

The contents and kinds of odorants in examples 1 to 3 were the same as those in comparative examples 1 to 2.

Test effect experiment:

1. rat-proof test:

the protective pipes of examples 1-3 of the invention and comparative experiments 1 and 2 were tested in groups, the pipes were cut into sections and placed in squirrel cages, the ends of the pipes were sealed with steel discs, and the surface conditions were observed after 48 hours.

2, ant resistance test:

the protective tube materials of examples 1-3 of the present invention were subjected to a group comparison test with those of comparative experiments 1 and 2, the comparative tube materials were cut into sections and placed in an ant box, both ends of the tube materials were sealed with steel sheets, and the surface conditions were observed after 48 hours.

Specific detailed experimental parameters are shown in table 1.

Table 1 recipe and process table

It is apparent from examples 1 to 3 that the polymer sealant or the polymer protective layer on the outermost layer was bitten and pecked after 48 hours compared to comparative examples 1 to 2, but the inner layer of this example was not damaged at all, while the PVC layer containing the odorant of comparative example 1 was damaged, and the PVC layer of comparative example 2 was also wire-woven, and damage was also found through the pores of the wire-woven, but the degree of damage was slightly lower than that of comparative example 1. Obviously, the protective pipe material of the invention can enable rat and ant to directly contact with the metal porous layer containing the odorant after destroying the first sealing layer, the rat and ant are stopped due to the dual action of the odorant and the metal porous layer, but the rat and ant tend to destroy the metal layer, and even if the metal net layer is adopted, the holes of the net holes are larger, so the rat and ant can peck the holes through the holes. The porous metal layer has smaller pores due to the adoption of emulsion particles, and the pores are tested to be in a micro-nano level, so that termites cannot pass through the porous metal layer, and the lower layer of the porous metal layer is also the metal layer, so that the isolation is completely realized, and the better technical effect is realized.

Obviously, the invention can also be an external protection device for cables, which directly adopts the pipeline as a protection pipe, and more obviously, the external protection device can be used not only as a protection pipe, but also as a sheath layer of the cable to directly form a protection effect without adding a further protection layer.

Although the present invention describes in detail a two-layer structure, it is fully possible for the manufacturer to provide additional layers depending on customer service needs. But the two layers described in the present invention can provide adequate protection, at least for protection against living things and cost savings.

Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.

Claims (3)

1. The preparation method of the special function power protection tube comprises a high polymer base material tube, wherein the base material tube is made of PVC or PE, and is characterized in that at least one functional layer is arranged outside the base material tube, and the functional layer is prepared by the following method:

(1) immersing a base material pipe into a first solution tank, and continuously impacting the surface of the pipe by using air, wherein the solution in the first solution tank is 30-50g/L of NaOH, 15-70g/L of sodium phosphate and Na ₂ CO ₃ 30-40g/L, OP-102-5g/L, the temperature of the solution is 60-70 ℃,

(2) and (2) passing the pipe processed in the step (1) through a clear water tank, and then introducing the pipe into a second solution tank, wherein the solution in the tank comprises the following components: chromic anhydride 15-20g/L, concentrated sulfuric acid 200-300mL/L, solution temperature 40-50 deg.C, and continuously impacting the surface of the pipe material with air,

(3) the pipe processed in the step 2 passes through a clear water tank, then is introduced into a third solution tank, the solution components are 5-15g/L of stannous chloride, 80-90ml/L of concentrated hydrochloric acid and 0.1-2g/L of nano tin, after being processed for 10-15min at room temperature, the pipe passes through the clear water tank at the speed of 1-3m/min,

(4) and (3) passing the pipe processed in the step (3) through a fourth solution tank, wherein the fourth solution tank comprises the following solutions: 0.2-0.5g/L of palladium chloride and 3-4mL/L of concentrated hydrochloric acid, soaking for 3-7min at normal temperature,

(5) and (4) enabling the pipe treated in the step (4) to pass through a clear water tank at the speed of 1-3m/min, and then introducing into a fifth solution tank, wherein the solution components are as follows: 60-80g/l of nickel sulfate, 50-200g/l of sodium acetate and NaH ₂ PO ₂ 30-50g/l, processing temperature 50-70 deg.C, time 0.5-1min to obtain a nickel metal layer,

(6) the pipe processed in the step 5 passes through a clear water tank and then is introduced into a sixth solution tank, the solution tank is polyacrylic acid emulsion, the pipe with the gap polyacrylic acid microspheres attached is obtained after evaporation treatment,

(7) and (3) introducing the pipe processed in the step (6) into a seventh solution tank, connecting the pipe with the cathode of the conductive roller, wherein the solution in the seventh solution tank is as follows: 30-50g/L nickel sulfamate, 40-80g/L nickel chloride and 30-60g/L boric acid, wherein nickel metal is deposited among gaps of the polyacrylic acid microspheres,

(8) directly introducing the pipe processed in the step 7 into an eighth solution tank without cleaning, wherein the solution tank is dimethyl sulfoxide solution until a porous nickel metal layer is obtained,

(9) cleaning the pipe processed in the step 8, introducing the pipe into a ninth solution tank, wherein the solution is dispersion liquid containing an odorant, the dipping time is 10min-1h,

(10) and drying the pipe obtained in the previous step and sealing the hole by using high molecular paint or varnish.

2. A power cable protection tube prepared by the method of claim 1.

3. The method of claim 1, wherein said odorant is camphor, capsaicin.