阅读说明：本技术 一种电缆阻水层涂覆工艺 (Cable water-blocking layer coating process ) 是由 杨培杰 郭伟杰 张志帆 张冲 于 2019-04-04 设计创作，主要内容包括：本发明提供一种电缆阻水层涂覆工艺,依次包括：喷胶工序,将光固化绝缘胶喷涂在电缆的导体表面；喷涂阻水粉工序,将阻水粉喷涂在导体表面,阻水粉为半透明颗粒；固化工序,UV固化箱内的紫外灯将光固化绝缘胶固化,从而使阻水粉通过光固化绝缘胶粘接于导体上；其中,喷胶工序、喷涂阻水粉工序和固化工序均在喷涂箱内进行,喷涂箱内的第一隔板和第二隔板分别将喷涂箱分隔为喷胶室、喷粉室和固化室,第一隔板和第二隔板的中央均设有供导体穿过的过线孔,UV固化箱设置于固化室内；导体依次穿过喷胶室、喷粉室和UV固化箱后伸出喷涂箱。本发明可将阻水粉稳定、均匀地涂覆于导体上,导体的阻水效果好,并且可安全地固化粘胶。(The invention provides a cable water-resistant layer coating process, which sequentially comprises the following steps: spraying a photo-curing insulating glue on the surface of the conductor of the cable; spraying water-blocking powder, namely spraying the water-blocking powder on the surface of the conductor, wherein the water-blocking powder is semitransparent particles; curing, namely curing the light-cured insulating glue by an ultraviolet lamp in a UV curing box so as to enable the water-blocking powder to be adhered to the conductor through the light-cured insulating glue; the spraying box is divided into a glue spraying chamber, a powder spraying chamber and a curing chamber by a first partition plate and a second partition plate in the spraying box, the centers of the first partition plate and the second partition plate are provided with wire passing holes for a conductor to pass through, and the UV curing box is arranged in the curing chamber; the conductor sequentially passes through the glue spraying chamber, the powder spraying chamber and the UV curing box and then extends out of the spraying box. The invention can stably and uniformly coat the water-blocking powder on the conductor, has good water-blocking effect of the conductor, and can safely cure the viscose.)

1. A cable water-resistant layer coating process is characterized by sequentially comprising the following steps:

a glue spraying procedure, namely spraying photocuring insulating glue on the surface of the conductor of the cable by using a glue spraying gun;

spraying water-blocking powder, namely spraying the water-blocking powder on the surface of the conductor by using a powder gun, wherein the water-blocking powder is in a semitransparent particle structure;

a curing process, namely enabling the conductor sprayed with the water-blocking powder to enter a UV curing box, and curing the light-curing insulating glue by an ultraviolet lamp in the UV curing box, so that the water-blocking powder is adhered to the conductor through the light-curing insulating glue;

the glue spraying process, the water blocking powder spraying process and the curing process are all carried out in a spraying box, the spraying box is divided into a glue spraying chamber, a powder spraying chamber and a curing chamber by a first partition plate and a second partition plate in the spraying box respectively, the centers of the first partition plate and the second partition plate are provided with wire passing holes for the conductors to pass through, and the UV curing box is arranged in the curing chamber; and the conductor sequentially passes through the glue spraying chamber, the powder spraying chamber and the UV curing box and then extends out of the spraying box.

2. The process for coating the water-resistant layer of the cable according to claim 1, wherein a first guide wheel and a second guide wheel are respectively arranged at the front section of the glue spraying process and the rear section of the curing process, and the front end and the rear end of the conductor are respectively tensioned on the first guide wheel and the second guide wheel.

3. The process for coating the cable water-blocking layer according to claim 2, wherein the glue spraying chamber, the powder spraying chamber and the curing chamber are sequentially arranged in the spraying box from bottom to top, and the first partition plate and the second partition plate are horizontally arranged in the spraying box.

4. The process according to claim 3, wherein at least two glue guns with opposite jet orifices are arranged in the glue spraying chamber, at least two powder guns with opposite jet orifices are arranged in the powder spraying chamber, and the two glue guns and the two powder guns uniformly spray the light-cured insulating glue and the water-blocking powder on the outer wall of the conductor respectively.

5. The process for coating the cable water-blocking layer according to claim 3, wherein an annular glue brush is mounted in the wire through hole of the first partition plate, the glue brush and the wire through hole of the first partition plate are coaxial, and bristles of the glue brush face the conductor; when the conductor passes through the wire passing hole of the first partition plate, the adhesive brush uniformly brushes the redundant light-cured insulating adhesive on the conductor.

6. The process of claim 5, wherein the distance between the bristles of the rubber brush and the surface of the conductor is 0.5-1 mm.

7. The cable water-blocking layer coating process according to claim 5, wherein an exhaust fan is installed at a top outlet in the UV curing box, and after the light-cured insulating adhesive on the surface of the conductor is cured by the ultraviolet lamp, the exhaust fan rapidly cools and ventilates the interior of the UV curing box.

Technical Field

The invention belongs to the technical field of cable processing, and particularly relates to a coating process of a cable water-blocking layer.

Background

The waterproof mode of the cable has two modes of longitudinal water resistance and radial water resistance, the radial water resistance is realized by extruding and wrapping an HDPE (high-density polyethylene) non-metal sheath or hot pressing, welding a metal sheath and the like, the longitudinal water resistance is commonly used by water-resistant yarns, water-resistant powder and water-resistant tapes, the water-resistant mechanism of the materials is that the materials contain water-swellable water-resistant materials, and when water enters from the end of the cable or from the notch of the sheath, the materials can be rapidly swelled when the water meets the water, so that the water is prevented from further diffusing along the longitudinal direction of the cable, and the purpose of longitudinal waterproof of the cable. In the existing water-blocking structure using the water-blocking powder, the water-blocking powder is usually directly scattered among layers, the adhesion strength of the water-blocking powder and a conductor is not high, and the water-blocking powder is easy to fall off from the conductor in the winding process of the conductor, so that the water-blocking effect is unstable. If the water-blocking powder is directly fixed on the conductor through the viscose, the viscose needs to be dried and solidified at high temperature so as to quickly fix the water-blocking powder and roll the conductor, but because the water-blocking powder for the cable is usually an acrylic polymer, the water-blocking powder is very easy to be burnt and exploded due to high heat in the high-temperature drying and solidifying process, and the safe production cannot be ensured.

Disclosure of Invention

The invention aims to provide a coating process of a cable water-blocking layer, which can stably and uniformly coat water-blocking powder on a conductor, has good water-blocking effect of the conductor, and can safely cure viscose.

The invention provides the following technical scheme:

a cable water-resistant layer coating process sequentially comprises the following steps: a glue spraying procedure, namely spraying photocuring insulating glue on the surface of the conductor of the cable by using a glue spraying gun; spraying water-blocking powder, namely spraying the water-blocking powder on the surface of the conductor by using a powder gun, wherein the water-blocking powder is in a semitransparent particle structure; a curing process, namely, feeding the conductor sprayed with the water-blocking powder into a UV curing box, and curing the light-curing insulating glue by an ultraviolet lamp in the UV curing box so as to enable the water-blocking powder to be adhered to the conductor through the light-curing insulating glue; the spraying box is divided into a glue spraying chamber, a powder spraying chamber and a curing chamber by a first partition plate and a second partition plate in the spraying box, the centers of the first partition plate and the second partition plate are provided with wire passing holes for a conductor to pass through, and the UV curing box is arranged in the curing chamber; the conductor sequentially passes through the glue spraying chamber, the powder spraying chamber and the UV curing box and then extends out of the spraying box.

Preferably, the front section of the glue spraying process and the rear section of the curing process are respectively provided with a first guide wheel and a second guide wheel, and the front end and the rear end of the conductor are respectively tensioned on the first guide wheel and the second guide wheel.

Preferably, the glue spraying chamber, the powder spraying chamber and the curing chamber are sequentially arranged in the spraying box from bottom to top, the first partition plate and the second partition plate are both arranged in the spraying box along the horizontal direction, and before the light-cured insulating glue on the conductor is not cured, the light-cured insulating glue has the tendency of sliding downwards along the axial direction of the conductor.

Preferably, at least two glue spraying guns with opposite jet orifices are arranged in the glue spraying chamber, at least two powder spraying guns with opposite jet orifices are arranged in the powder spraying chamber, and the two glue spraying guns and the two powder spraying guns uniformly spray photocuring insulating glue and water-blocking powder on the outer wall of the conductor respectively.

Preferably, an annular rubber brush is arranged in the wire passing hole of the first partition plate, the rubber brush and the wire passing hole share the same axis, and bristles of the rubber brush face the conductor; when the conductor passes through the wire passing hole of the first partition plate, the adhesive brush uniformly brushes the redundant light-cured insulating adhesive on the conductor.

Preferably, an exhaust fan is installed at an outlet at the top in the UV curing box, after the light-cured insulating adhesive on the surface of the conductor is cured by an ultraviolet lamp, the exhaust fan rapidly cools and ventilates the UV curing box, and the water-blocking powder is kept to be cured in a low-temperature environment.

The invention has the beneficial effects that: the invention firstly sprays the light-cured insulating glue on the surface of the conductor, then sprays the water-blocking powder, pre-adheres the water-blocking powder on the conductor by using the light-cured insulating glue, then sends the conductor into a UV curing box to cure the light-cured insulating glue, so that the water-blocking powder and the conductor are tightly adhered into a whole, the water-blocking powder is uniformly coated, and the water-blocking powder cannot fall off from the conductor. The curing process can quickly cure the light-cured insulating glue, so that the rear-section winding process of the conductor is convenient to carry out in time, the winding efficiency is improved, the phenomena of movement and falling of the water-blocking powder layer cannot be caused even if the conductor is in contact friction with the second guide wheel in the winding process, the uniform coating of the water-blocking powder layer is ensured, and the water-blocking effect is good; the invention utilizes the normal temperature UV curing process to replace the high temperature drying curing process to rapidly cure the insulating glue, thereby avoiding the water-blocking powder from easily causing combustion and explosion in a high temperature environment and improving the safety of the process operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of an apparatus corresponding to the process of the present invention.

Detailed Description

A cable water-resistant layer coating process sequentially comprises the following steps: glue spraying, water blocking powder spraying and curing. The glue spraying process is to spray the light-cured insulating glue on the surface of the conductor of the cable, the light-cured insulating glue can not be cured in the process and can be cured only by ultraviolet irradiation, and the type of the light-cured insulating glue is Gaole GOLDIA UV-8120. The procedure of spraying the water-blocking powder is to spray the water-blocking powder on the surface of a conductor, the water-blocking powder is pre-adhered on the surface of the conductor by the light-cured insulating glue, the component of the water-blocking powder is acrylic polymer, the acrylic polymer is a water-swelling substance formed by irradiation polymerization, the water-blocking powder is white particles when being gathered and piled up, the water-blocking powder is translucent when being sprayed on the surface of the conductor in a distributed manner, and the translucent water-blocking powder layer can enable ultraviolet rays to pass through the water-blocking powder to reach the light-cured insulating glue, so that the insulating glue is cured. The curing process is to make the conductor sprayed with the water-blocking powder enter a UV curing box, and an ultraviolet lamp in the UV curing box rapidly cures the light-cured insulating glue, so that the water-blocking powder is fixed on the conductor through the light-cured insulating glue, wherein the brand of the ultraviolet lamp is Philips, the wavelength is 365-400nm, and the light intensity is 75mW/cm²(ii) a The working procedure is carried out at normal temperature, replaces the common high-temperature drying and curing glue process, and avoids the hidden danger that the water-blocking powder is easy to cause combustion and explosion in a high-temperature environment; when the conductor after the photocuring insulating glue is cured is wound, the water-blocking powder cannot move or fall off on the conductor even if friction between the water-blocking powder and the guide wheel exists, so that the coating uniformity of the water-blocking powder is improved; the process does not need to wait for the water-blocking powder and glue to naturally solidify and then roll the conductor, thereby improving the yieldVolume efficiency.

As shown in fig. 1, the glue spraying process, the water blocking powder spraying process and the curing process are all performed in the spraying box 1, and the spraying box 1 forms a relatively sealed environment, so that the photo-cured insulating glue and the water blocking powder are prevented from freely escaping in a working environment during spraying, and a user is further protected from ultraviolet radiation. A first clapboard 2 and a second clapboard 3 in the spraying box 1 divide the spraying box 1 into a glue spraying chamber 4, a powder spraying chamber 5 and a curing chamber 6 respectively, the centers of the first clapboard 2 and the second clapboard 3 are provided with wire passing holes 8 for a conductor 7 to pass through, and a UV curing box 9 is arranged in the curing chamber 6; the conductor 7 sequentially passes through the glue spraying chamber 4, the powder spraying chamber 5 and the UV curing box 9 and then extends out of the spraying box 1.

The front section of the glue spraying process and the rear section of the curing process are respectively provided with a first guide wheel 10 and a second guide wheel 11, the front end and the rear end of the conductor 7 are respectively tensioned on the first guide wheel 10 and the second guide wheel 11, the conductor on the wire coil is unreeled and then led into the spraying box 1 through the first guide wheel 10, and the conductor 7 after the spraying and curing is led into the winding device through the second guide wheel 11 after extending out of the spraying box 1. The conductor 7 is tensioned on the first guide wheel 10 and the second guide wheel 11 and continuously moves from the front section to the rear section at a constant speed, and the conductor 7 is always kept in a tensioned state in the spraying box 1, so that the surface of the conductor 7 is uniformly sprayed with the light-cured insulating adhesive and the water-blocking powder.

The glue spraying chamber 4, the powder spraying chamber 5 and the curing chamber 6 are sequentially arranged in the spraying box 1 from bottom to top, the first partition plate 2 and the second partition plate 3 are both arranged in the spraying box 1 along the horizontal direction, and before the light-cured insulating glue on the conductor 7 is not cured, the light-cured insulating glue has the tendency of falling along the axial direction of the conductor due to the action of gravity. If the glue spraying chamber, the powder spraying chamber and the curing chamber are arranged from left to right in sequence, the light-cured insulating glue has the tendency of falling along the radial direction of the conductor, so that the light-cured insulating glue is unevenly distributed in the radial direction of the conductor, and the water-blocking powder is unevenly coated. This spraying case spout gluey room 4, dust spray booth 5 and curing chamber 6 by supreme structure that sets up down, makes the photocuring insulating cement have along the trend of the axial tenesmus of conductor 7, consequently does not influence the coating homogeneity of powder that blocks water at the radial surface of conductor 7, and because conductor 7 is continuously from the axial tenesmus of up, even photocuring insulating cement along conductor 7, does not influence the powder that blocks water and evenly coats on conductor 7.

In the glue spraying process and the powder spraying process, the conductor 7 simultaneously passes through two glue spraying guns 12 and two powder spraying guns 13, and the concrete structure is as follows: at least two glue spraying guns 12 with opposite jet orifices are arranged in the glue spraying chamber 4, at least two powder spraying guns 13 with opposite jet orifices are arranged in the powder spraying chamber 5, the glue spraying guns 12 and the powder spraying guns 13 are respectively connected with the glue barrel and the powder barrel, and the two glue spraying guns 12 and the two powder spraying guns 13 respectively uniformly spray photocuring insulating glue and water-blocking powder on the outer wall of the conductor 7.

An annular glue brush 14 is arranged in the wire passing hole 8 of the first partition plate 2, the glue brush 14 and the wire passing hole of the first partition plate 2 are coaxial, the brush hair of the glue brush 14 faces the conductor 7, and the distance between the brush hair and the surface of the conductor 7 is 0.5-1 mm. Because the light-cured adhesive can be cured under the irradiation of ultraviolet rays, before curing, when the conductor 7 passes through the wire passing hole 8 of the first partition plate 2, the adhesive brush 14 can easily brush the redundant light-cured insulating adhesive on the conductor 7 or the light-cured insulating adhesive which is not uniformly coated, so that the coating uniformity of the water-blocking powder in the subsequent process is improved. Similarly, a painting brush (not shown) with a similar structure can be arranged in the wire through hole of the second partition board 3, and the brush hair of the painting brush is thinner and softer, so that the water-blocking powder can be further uniformly coated on the surface of the conductor 7 to form a smooth water-blocking layer.

And an exhaust fan 15 is installed at an outlet at the top part in the UV curing box 9, and when the ambient temperature is higher, the exhaust fan 15 can be selectively opened to cool and ventilate the UV curing box 9, so that the water-blocking powder is ensured to be cured in a low-temperature environment. Install exhaust fan 15 at the top exit of UV curing box 9, the photocuring insulating cement on conductor 7 surface is by ultraviolet lamp 16 solidification back, passes through exhaust fan 15 again, therefore exhaust fan 15 can not lead to the fact the influence to the solidification process.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.