A processing device for longitudinal packaging of non-woven fabrics

Abstract

A processing device for non-woven fabric longitudinal wrapping operation, comprising a wire guide wheel, three guide rod pairs, an upper longitudinal wrapping mold, and a lower longitudinal wrapping mold. The width of the upper non-woven fabric wrapping tape is equal to the width of the lower non-woven fabric wrapping tape. The upper longitudinal wrapping mold and the lower longitudinal wrapping mold are congruent. The support shaft of the upper non-woven fabric wrapping tape mother roll, the support shaft of the wire guide wheel, and the support shaft of the lower non-woven fabric wrapping tape mother roll are respectively installed on the first mounting column. Each guide rod is connected to the guide rod mounting wall in a rolling manner; the upper longitudinal wrapping mold is an adjustable inverted wrapping mold, and the inner surface of the upper longitudinal wrapping mold transitions from an inverted U-shaped form to a curved arc shape with a wrapping angle greater than or equal to 190° from left to right. The upper ends of the corresponding parts of the front and rear sides of the lower non-woven fabric wrapping tape cover the lower end of the upper non-woven fabric wrapping tape, and the right end of the inner surface of the upper longitudinal wrapping mold covers the right end of the lower non-woven fabric wrapping tape; the right end of the inner surface of the lower longitudinal wrapping mold covers the corresponding part of the lower non-woven fabric wrapping tape. The invention has the advantages of simple structure, high operation efficiency and good coating effect.

Description

Technical Field

[0001] The invention relates to a processing device for longitudinally covering a cable with a nonwoven fabric. Background Art

[0002] Armored cables have been widely promoted and applied in my country due to their high compressive strength and strong ability to prevent external damage and external erosion. Polyethylene sheathed armored cables are widely used in waterproof occasions and cold areas in northern my country due to their good waterproof and cold resistance. However, polyethylene has poor resistance to environmental stress cracking. Therefore, during the cable processing, special attention should be paid to the anti-cracking performance of polyethylene raw materials, the release of internal stress during polyethylene sheath extrusion, and the design of cable structure to prevent cracks in the polyethylene sheath of the cable during construction. Cable armor generally adopts double steel belt gap wrapping. The steel belt has high hardness and will have a large rebound trend during wrapping, which aggravates the external tension on the polyethylene sheath. When the polyethylene sheath is extruded, the polyethylene sheath is stretched and then wrapped on the surface of the steel belt armor. Due to the poor surface flatness of the steel belt, the thickness of the polyethylene sheath is uneven. The thin thickness of the polyethylene sheath has low mechanical strength and is most likely to crack under stress. Therefore, when processing polyethylene sheaths, it is necessary to select suitable raw materials, reasonably match molds and perform segmented cooling. Generally, a non-woven fabric buffer layer is added inside the polyethylene sheath to separate the polyethylene sheath from the steel belt, so that small cracks are not easily generated on the inside of the polyethylene sheath. The non-woven fabric buffer layer bears the main stress, avoiding local stress on the polyethylene sheath and playing a role in protecting the polyethylene sheath.

[0003] At present, in the cable manufacturing process, there are special processing devices for longitudinal wrapping of metal strips such as aluminum-plastic composite strips, steel strips, copper strips and aluminum strips, and they have been widely used. However, these special processing devices for longitudinal wrapping are not suitable for longitudinal wrapping of non-metallic soft strips such as non-woven fabrics. Therefore, non-metallic soft strips such as non-woven fabrics are basically wrapped in a wrapping method, which is not only time-consuming and labor-intensive, but also increases the risk of quality defects in the processing process. For example, the patent technology with application number 201020234163.3, authorization announcement number CN 201845600 U, and the name "cable for plateau deep cold strong ultraviolet zone" is like this. The main reason is that there are some problems when non-woven fabrics and other non-metallic soft tapes are longitudinally wrapped: First, the tape rebounds. Non-woven fabrics and other non-metallic soft tapes have greater elasticity. After longitudinally wrapped [that is, after exiting the longitudinal wrapping mold], they cannot wrap the cable core as reliably as the longitudinally wrapped metal tapes. Therefore, after exiting the forming longitudinal wrapping mold, there will be a restorative flattening trend [that is, the tape previously formed by the forming mold forms a closed tubular state, returns to a U-shaped or even C-shaped or flattened state that tends to be straight, and fails to meet the requirements of longitudinal wrapping]; second, the wrapping is incomplete. Non-woven fabrics and other non-metallic soft tapes have greater elasticity and directly wrinkle during longitudinal wrapping, and cannot be longitudinally wrapped into 360°, resulting in the failure of the two longitudinally overlapped edges of the tape after the longitudinal wrapping to overlap and overlap together; third, some polyethylene sheathed armored cables, the voltage level involves medium and low voltage cables, and the cable outer diameter is generally greater than or equal to 20 mm. The larger the outer diameter of the cable, the more difficult it is to longitudinally wrap the non-woven tape. Summary of the invention

[0004] The main purpose of the present invention is to provide a processing device that can use the longitudinal wrapping process to complete the non-woven fabric longitudinal wrapping operation on cables with outer diameters greater than or equal to 20 mm.

[0005] The technical scheme used in the present invention is: a processing device for non-woven fabric longitudinal wrapping operation, including a cable core wire guide wheel, three guide rod pairs composed of six guide rods in three groups for clamping the cable core, the upper non-woven fabric wrapping tape, and the lower non-woven fabric wrapping tape, an upper longitudinal wrapping mold, and a lower longitudinal wrapping mold. The width of the upper non-woven fabric wrapping tape is equal to the width of the lower non-woven fabric wrapping tape, and the wrapping angle of the upper non-woven fabric wrapping tape wrapped on the surface of the cable core is greater than or equal to 190°;

[0006] The upper longitudinal die and the lower longitudinal die are congruent;

[0007] The three guide rod pairs are located on the right side of the line guide wheel;

[0008] The strip inlet of the upper longitudinal die is located on the right side of the three guide rod pairs;

[0009] The strip outlet of the lower longitudinal die is located on the right side of the strip outlet of the upper longitudinal die; the distance between the strip outlet of the lower longitudinal die and the strip outlet of the upper longitudinal die is 10 to 50 mm;

[0010] The belt inlet of the paralleling die is located on the right side of the belt outlet of the lower longitudinal wrapping die; the sheath extruder head is located on the right side of the belt outlet of the paralleling die;

[0011] The support shaft of the upper non-woven fabric wrapping tape mother roll, the support shaft of the wire guide wheel, and the support shaft of the lower non-woven fabric wrapping tape mother roll are respectively installed on the first installation column. Each guide rod is rollingly connected to the guide rod installation wall;

[0012] The upper longitudinal mold is an adjustable inverted mold composed of two longitudinal molding plates at the front and rear ends, and the inner surface of the upper longitudinal mold transitions from an inverted U-shaped form to a curved arc shape with a wrapping angle greater than or equal to 190° from left to right. Correspondingly, the upper ends of the corresponding parts of the front and rear sides of the lower non-woven fabric wrapping tape cover the lower end of the upper non-woven fabric wrapping tape, the right end of the inner surface of the upper longitudinal mold wraps the right end of the lower non-woven fabric wrapping tape; the right end of the inner surface of the lower longitudinal mold wraps the corresponding part of the lower non-woven fabric wrapping tape.

[0013] Here, "the upper longitudinal wrapping mold and the lower longitudinal wrapping mold are congruent" means that the structural composition of the upper longitudinal wrapping mold and the lower longitudinal wrapping mold are the same, and the corresponding dimensions of each part are also the same; the support shaft of the upper non-woven fabric wrapping mother roll and the support shaft of the lower non-woven fabric wrapping mother roll are respectively fixedly connected to the first mounting column, and the support shafts of the upper non-woven fabric wrapping mother roll and the upper non-woven fabric wrapping mother roll, and the support shafts of the lower non-woven fabric wrapping mother roll and the lower non-woven fabric wrapping mother roll are rotationally connected with a damping structure, or the support shafts of the upper non-woven fabric wrapping mother roll and the upper non-woven fabric wrapping mother roll and the support shafts of the lower non-woven fabric wrapping mother roll are detachably fixed, and the support shafts of the upper non-woven fabric wrapping mother roll and the lower non-woven fabric wrapping mother roll are rotationally connected with a damping structure with the first mounting column. Similarly, the cable core roll, cable core reel and cable core reel not mentioned in the text also have the relationship among the upper non-woven tape mother roll, the support shaft of the upper non-woven tape mother roll and the first mounting column. When in use, first connect the upper non-woven tape mother roll, the lower non-woven tape mother roll, the cable core roll and their respective support shafts, loosen the guide rod pair, the upper longitudinal wrapping mold, the lower longitudinal wrapping mold, the paralleling mold, and the sheath extruder head, and then pull the upper non-woven tape, the cable core and the lower non-woven tape into place, and then adjust the loosened guide rod pair, the upper longitudinal wrapping mold, the lower longitudinal wrapping mold, the paralleling mold, and the sheath extruder head back into place, and then start the machine to perform the corresponding operation. Since the upper non-woven tape and the lower non-woven tape are both in a certain tension state during the entire operation, and the edge of the lower non-woven tape covers the edge of the upper non-woven tape when entering the paralleling mold, the present invention has the advantage of using a wrapping method to allow the non-woven tape to completely cover the cable core, and has the advantages of simple structure, high operation efficiency and good covering effect that the wrapping method does not have.

[0014] Preferably, the line-joining die is a Hough-type line-joining die, which is a very mature line-joining die and is very conducive to the forming and stabilization of the non-woven fabric wrapping tape after longitudinal wrapping.

[0015] Preferably, the upper longitudinal wrapping mold is composed of two front and rear longitudinal wrapping forming plates fastened together by corresponding fastening bolts. This preferred solution has a simple structure and is easy to operate.

[0016] Preferably, among the three guide rod pairs, the guide rod pair for the cable core is located on the left side of the guide rod pair for the upper non-woven fabric wrapping tape and the lower non-woven fabric wrapping tape. This preferred solution has a high structural rationality.

[0017] Preferably, the distance between the lower end of the right end of the upper longitudinal mold and the upper end of the corresponding part of the lower longitudinal mold is 0.1-0.2 mm. In other words, each lower end point of the upper longitudinal mold is above the upper end point of the corresponding part of the lower longitudinal mold, and the minimum distance between each point of the lower end of the upper longitudinal mold and the upper end point of the corresponding part of the lower longitudinal mold is 0.1-0.2 mm, so that the upper longitudinal mold and the lower longitudinal mold will not have collision and interference problems, and it is conducive to obtaining a smooth coating structure.

[0018] In summary, the beneficial effects of the present invention are: providing a new solution for wrapping the non-woven fabric tape on the cable core, and the related longitudinal wrapping processing device has the advantages of simple structure, high operating efficiency and good wrapping effect compared to the winding processing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : A schematic structural diagram of the present invention;

[0020] Figure 2 : Structural diagram of lower longitudinal package mold;

[0021] Figure 3 : Side view of the lower longitudinal package mold;

[0022] In the figure: cable core 1, wire guide wheel 2, support shaft 2A of wire guide wheel, upper non-woven fabric wrapping tape 3, support shaft 3A of upper non-woven fabric wrapping tape mother roll, lower non-woven fabric wrapping tape 4, support shaft 4A of lower non-woven fabric wrapping tape mother roll, guide rod 5, upper longitudinal wrapping mold 6, lower longitudinal wrapping mold 7, paralleling mold 8, sheath extruder head 9, first mounting column 10, rod mounting wall 11. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0024] like Figure 1 As shown, the present invention includes a wire guide wheel 2 for a cable core 1, three guide rod pairs consisting of six guide rods 5 divided into three groups for clamping the cable core 1, the upper non-woven fabric tape 3, and the lower non-woven fabric tape 4, respectively, an upper longitudinal wrapping mold 6 for wrapping the upper non-woven fabric tape 3 on the surface of the cable core 1, and a lower longitudinal wrapping mold 7 for wrapping the lower non-woven fabric tape 4 on the surface of the cable core 1. The width of the upper non-woven fabric tape 3 is preferably equal to the width of the lower non-woven fabric tape 4, and the wrapping angle [central angle] of the upper non-woven fabric tape 3 wrapped on the surface of the cable core 1 is greater than or equal to 190° and less than or equal to 220°;

[0025] The upper longitudinal package mold 6 and the lower longitudinal package mold 7 are congruent;

[0026] The three guide rod pairs are located on the right side of the wire guide wheel 2; the belt inlet of the upper longitudinal wrapping mold 6 is located on the right side of the three guide rod pairs;

[0027] The tape outlet of the lower longitudinal wrapping mold 7 is located on the right side of the tape outlet of the upper longitudinal wrapping mold 6; the horizontal distance between the tape outlet of the lower longitudinal wrapping mold 7 and the tape outlet of the upper longitudinal wrapping mold 6 is adjusted within the range of 10 to 50 mm according to the wire core diameter, so as to ensure that the distance between the lower end of the right end of the upper longitudinal wrapping mold 6 and the upper end of the corresponding part of the lower longitudinal wrapping mold 7 is preferably 0.1-0.2 mm; in this embodiment, the position of the upper longitudinal wrapping mold 6 is fixed, and the distance between the lower end of the right end of the upper longitudinal wrapping mold 6 and the upper end of the corresponding part of the lower longitudinal wrapping mold 7 is adjusted by adjusting the left and right positions of the lower longitudinal wrapping mold 7;

[0028] The belt inlet of the paralleling die 8 is located on the right side of the belt outlet of the lower longitudinal wrapping die 7; the distance between the belt outlet of the lower longitudinal wrapping die 7 and the belt inlet of the paralleling die 8 is appropriately adjusted or not adjusted;

[0029] The sheath extruder head 9 is located on the right side of the strip outlet of the paralleling die 8;

[0030] The support shaft 3A of the upper non-woven fabric tape mother roll, the support shaft 2A of the wire guide wheel, and the support shaft 4A of the lower non-woven fabric tape mother roll are respectively installed on the first installation column 10; each guide rod 5 is rollingly connected to the guide rod installation wall 11;

[0031] Among them, the upper longitudinal wrapping mold 6 is an adjustable inverted wrapping mold composed of two longitudinal wrapping forming plates in front and behind. Preferably, the upper longitudinal wrapping mold 6 is composed of two longitudinal wrapping forming plates in front and behind that are fastened together by corresponding fastening bolts [due to simple technology, not shown in detail in the figure]. The inner surface of the upper longitudinal wrapping mold 6 transitions from an inverted U-shaped form to a curved arc form with a wrapping angle greater than or equal to 190° to less than or equal to 220° from left to right, and the wrapping angle increases with the increase of the cable core diameter. Correspondingly, the upper ends of the corresponding parts of the front and rear sides of the lower non-woven fabric wrapping tape 4 are covered on the lower end of the upper non-woven fabric wrapping tape 3, and the right end of the inner surface of the upper longitudinal wrapping mold 6 is wrapped on the right end of the lower non-woven fabric wrapping tape 4; the right end of the inner surface of the lower longitudinal wrapping mold 7 is wrapped on the corresponding part of the lower non-woven fabric wrapping tape 4. The paralleling mold 8 is preferably a half-type paralleling mold, which is conducive to the forming and stability of the non-woven fabric wrapping tape after longitudinal wrapping.

[0032] Preferably, among the three guide rod pairs, the guide rod pair for the cable core 1 is located on the left side of the guide rod pair for the upper non-woven fabric tape 3 and the lower non-woven fabric tape 4. The cable core 1, the upper non-woven fabric tape 3 and the lower non-woven fabric tape 4 are respectively passed through the guide rod pairs by the guide rod clamping columns in the corresponding guide rod pairs, thereby ensuring that the cable core 1, the upper non-woven fabric tape 3 and the lower non-woven fabric tape 4 between the guide rod pairs corresponding to the cable core 1, the upper non-woven fabric tape 3 and the lower non-woven fabric tape 4 and the sheath extruder head 9 are always in a certain tension state, thereby preventing the upper non-woven fabric tape 3 and the lower non-woven fabric tape 4 from having surface wrinkles, thereby facilitating the longitudinal wrapping quality of the cable non-woven fabric tape.

[0033] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation structure and implementation scope of the present invention. In fact, some equivalent changes can also be made according to the shape, structure and design purpose described in the present invention. Therefore, all equivalent changes made according to the shape, structure and design purpose described in the present invention should be included in the protection scope of the present invention, that is, these equivalent changes should be protected by the present invention.

Claims

1. A processing device for longitudinal packaging of nonwoven fabrics, characterized in that: It comprises a cable core (1) wire guide wheel (2), three guide rod pairs composed of six guide rods (5) in three groups, respectively used to clamp the cable core (1), an upper non-woven fabric wrapping tape (3), and a lower non-woven fabric wrapping tape (4), an upper longitudinal wrapping mold (6), and a lower longitudinal wrapping mold (7); the width of the upper non-woven fabric wrapping tape (3) is equal to the width of the lower non-woven fabric wrapping tape (4), and the wrapping angle of the upper non-woven fabric wrapping tape (3) wrapped on the surface of the cable core (1) is greater than or equal to 190°; The upper longitudinal encapsulation mold (6) and the lower longitudinal encapsulation mold (7) are congruent; The three guide rod pairs are located on the right side of the wire guide wheel (2); The strip inlet of the upper longitudinal wrapping die (6) is located on the right side of the three guide rod pairs; The strip outlet of the lower longitudinal wrapping mold (7) is located on the right side of the strip outlet of the upper longitudinal wrapping mold (6); the distance between the strip outlet of the lower longitudinal wrapping mold (7) and the strip outlet of the upper longitudinal wrapping mold (6) is 10 to 50 mm; The strip inlet of the paralleling die (8) is located on the right side of the strip outlet of the lower longitudinal wrapping die (7); The sheath extruder head (9) is located on the right side of the strip outlet of the paralleling die (8); The support shaft (3A) of the upper non-woven fabric tape mother roll, the support shaft (2A) of the wire guide wheel, and the support shaft (4A) of the lower non-woven fabric tape mother roll are respectively mounted on the first mounting column (10); each guide rod (5) is rollingly connected to the guide rod mounting wall (11); The upper longitudinal wrapping mold (6) is an adjustable inverted wrapping mold formed by two front and rear longitudinal wrapping forming plates, and the inner surface of the upper longitudinal wrapping mold (6) transitions from an inverted U-shaped form to a curved arc shape with a wrapping angle greater than or equal to 190 degrees from left to right; accordingly, the upper ends of the corresponding parts of the front and rear sides of the lower non-woven fabric wrapping tape (4) cover the lower end of the upper non-woven fabric wrapping tape (3), and the right end of the inner surface of the upper longitudinal wrapping mold (6) covers the right end of the lower non-woven fabric wrapping tape (4); the right end of the inner surface of the lower longitudinal wrapping mold (7) covers the corresponding part of the lower non-woven fabric wrapping tape (4).

2. A processing device for longitudinal packaging of nonwoven fabrics according to claim 1, characterized in that: The paralleling die (8) is a Hough-type paralleling die.

3. A processing device for longitudinal packaging of nonwoven fabrics according to claim 1, characterized in that: The upper longitudinal wrapping mold (6) is composed of two front and rear longitudinal wrapping forming plates fastened together by corresponding fastening bolts.

4. A processing device for longitudinal packaging of nonwoven fabrics according to claim 1, characterized in that: Among the three guide rod pairs, the guide rod pair for the cable core (1) is located on the left side of the guide rod pair for the upper non-woven fabric wrapping tape (3) and the lower non-woven fabric wrapping tape (4).

5. The processing device for longitudinally wrapping nonwoven fabrics according to claim 1, characterized in that: The distance between the lower end of the right end of the upper longitudinal enveloping mold (6) and the upper end of the corresponding part of the lower longitudinal enveloping mold (7) is 0.1-0.2 mm.

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