Leaky coaxial cable production method

Abstract

The invention relates to the technical field of leaky coaxial cable production, in particular to a leaky coaxial cable production method which comprises the following steps: S1, welding an inner conductor; s2, foaming and extruding to form an insulating layer; s3, seamless welding of the outer conductor; s4, performing laser hole cutting on the outer conductor through laser processing equipment; and S5, sheath processing. According to the leaky coaxial cable production method, after the outer conductor is seamlessly welded into the circular tube, slotted hole cutting is carried out on the outer conductor through laser, the roundness of the outer conductor can be better, meanwhile, the situations of slotted hole deformation, wrinkling and the like can be reduced, and the cable performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of leaky coaxial cable production, and in particular to a leaky coaxial cable production method. Background Art

[0002] In the manufacturing process of the outer conductor of the radial leaky coaxial cable, the smooth copper strip is punched with a punching die to form the outer conductor copper strip. In the sheathing process, the copper strip is corrugated and longitudinally wrapped. The overlapping copper strips are longitudinally wrapped outside the insulating cable core. The overlapping seams produced by the overlapping copper strips are located at the top, and the outer conductor slots are located at the bottom. In this process, the copper strip after punching needs corrugation to ensure a smoother longitudinal wrapping outside the insulation layer. The different corrugation depths cause the slot size before punching and after corrugation to be different. Figure 3 Generally, the slotting process is carried out when the copper strip is in a flat state.

[0003] However, due to the different shapes of the slots during the longitudinal wrapping process, the slots are prone to deformation and wrinkles at the longitudinal wrapping forming point, affecting performance. At the same time, the longitudinal wrapping is at the top, and the slots are at the bottom after longitudinal wrapping, so it is impossible to detect abnormal conditions such as slot deformation in time, affecting performance. In addition, the outer conductor slots are longitudinally wrapped at the border, and the roundness of the outer conductor depends entirely on the roundness of the insulation layer. It is easy for the outer conductor slots to deform, affecting electrical performance indicators. Summary of the invention

[0004] The technical problem to be solved by the present invention is: In order to solve the technical problem in the prior art, the present invention provides a method for producing a leaky coaxial cable.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a method for producing a leaky coaxial cable, comprising the following steps:

[0006] S1, inner conductor welding;

[0007] S2, foaming and extrusion to form an insulating layer;

[0008] S3, seamless welding of outer conductor;

[0009] S4, laser cutting holes in the external conductor using laser processing equipment;

[0010] S5. Sheath processing.

[0011] A leaky coaxial cable production method of the present invention first seamlessly welds an outer conductor into a round tube, and then cuts slots on the outer conductor by laser, which can improve the roundness of the outer conductor and reduce deformation and wrinkles of the slots, thereby improving cable performance.

[0012] Furthermore, in step S2, 1-2 layers of highly flame-retardant and fire-proof glass cloth tape or mica tape are wrapped around the insulating layer.

[0013] Furthermore, in step S3, when the outer conductor is seamlessly welded, a smooth copper strip is longitudinally wrapped outside the insulating layer, and the joints of the copper strips are welded by argon arc welding to form a sealed metal tube structure. The outer conductor is corrugated by high-speed corrugating equipment to form a ring-shaped outer conductor structure with peaks and troughs.

[0014] Furthermore, the laser processing equipment includes a frame, a fixing device, a limiting mold and a laser emitter. The fixing device is arranged on the frame and is detachably connected to the limiting mold. The limiting mold is for the outer conductor to pass through. The laser emitter is synchronized with the signal of the sheath traction device so that the laser cutting and the movement of the outer conductor are carried out synchronously.

[0015] Furthermore, a processing groove is provided on the side wall of the limiting mold, and the laser emitted by the laser emitter passes through the processing groove and is emitted onto the outer conductor.

[0016] Furthermore, a brush device is provided on the frame, and the brush device cleans the cut outer conductor to remove outer conductor debris generated by cutting.

[0017] Furthermore, a high-pressure air blowing tool is provided on the frame, and an air outlet end of the high-pressure air blowing tool is arranged toward the side where the outer conductor is cut, so as to clean the outer conductor debris.

[0018] Furthermore, a lateral moving component is provided on the frame, and a movable end of the lateral moving component is connected to the laser emitter to adjust the distance between the laser emitter and the outer conductor.

[0019] Furthermore, the movable end of the lateral moving component is connected to the vertical moving component, and the movable end of the vertical moving component is connected to the laser emitter to adjust the height of the laser emitter.

[0020] Furthermore, the output end of the laser transmitter can be swung in the horizontal direction to adjust the emission angle.

[0021] The beneficial effects of the present invention are:

[0022] 1. First, weld the outer conductor seamlessly into a round tube, and then cut the slots on the outer conductor by laser, which can ensure better roundness of the outer conductor, reduce deformation and wrinkles of the slots, and improve cable performance;

[0023] 2. By wrapping 1-2 layers of highly flame-retardant fireproof glass cloth tape or mica tape on the insulation layer, the insulation layer can be protected and the possibility of overheating damage can be reduced. It is also convenient for subsequent laser cutting and reduces the possibility of damage to the insulation layer caused by laser cutting.

[0024] 3. The corrugation method is used to form the peak and trough sizes with large differences. There are more cavities in the outer conductor cavity, which increases the foaming degree of the insulation product and thus improves the product performance;

[0025] 4. The laser cutting hole of the outer conductor is on the side, which avoids the deformation of the outer conductor after the longitudinal wrapping of the copper tape process, and can directly see the shape and size of the outer conductor after laser cutting;

[0026] 5. Through the setting of the lateral moving component and the vertical moving component, the lateral moving component can adjust the distance between the laser emitter and the outer conductor, thereby controlling the laser focus to achieve precise cutting. The vertical moving component can adjust the height of the laser emitter, thereby keeping it consistent with the height of the corrugated semi-finished cable core and accurately cutting the shape of the slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 The present invention is a schematic diagram of a process for producing a leaky coaxial cable.

[0029] Figure 2 It is a schematic diagram of the laser processing equipment embodied in the present invention.

[0030] Figure 3 It is a schematic diagram of copper strips and slots in the prior art.

[0031] In the figure: 1. frame; 2. fixing device; 3. limiting mold; 31. processing groove; 4. laser transmitter; 41. horizontal moving component; 42. vertical moving component; 5. brush device; 51. motor; 52. steel brush; 6. high-pressure blowing tooling; 61. blowing ring; 7. copper belt; 71. slot hole. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The invention discloses a method for producing a leaky coaxial cable.

[0035] Reference Figure 1 and Figure 2 , a leaky coaxial cable production method, comprising the following steps:

[0036] S1. Inner conductor welding.

[0037] S2. An insulating layer is formed on the inner conductor by foaming and extrusion, and then 1-2 layers of highly flame-retardant fireproof glass cloth tape or mica tape are wrapped around the insulating layer to prevent the insulating layer from being damaged by overheating.

[0038] S3, the outer conductor is seamlessly welded, and the smooth copper strip is longitudinally wrapped outside the insulation layer. The copper strip joints are welded by argon arc welding to form a sealed metal tube structure. The outer conductor is corrugated by high-speed corrugating equipment to form a ring-shaped outer conductor structure with peaks and troughs. The corrugation method forms large differences in peak and trough sizes, and there are more cavities in the outer conductor cavity, which increases the foaming degree of the insulation product, thereby improving product performance.

[0039] S4. Laser cutting holes in the outer conductor using laser processing equipment.

[0040] The laser processing equipment includes a frame 1, a fixing device 2, a limiting mold 3 and a laser emitter 4. The fixing device 2 is arranged on the frame 1 and is detachably connected to the limiting mold 3. The limiting mold is for the outer conductor to pass through. The laser emitter 4 is synchronized with the signal of the sheath traction equipment so that the laser cutting and the movement of the outer conductor are carried out synchronously.

[0041] A processing groove 31 is provided on the side wall of the limiting mold 3, and the laser emitted by the laser emitter 4 passes through the processing groove 31 and is projected onto the outer conductor. The laser cutting hole of the outer conductor is on the side, which avoids the deformation of the outer conductor after the longitudinal copper strip wrapping process, and can directly see the shape and size of the outer conductor after laser cutting.

[0042] The frame 1 is provided with a brush device 5, which cleans the cut outer conductor to remove the outer conductor debris generated by cutting. The fixing device 2 and the limiting mold 3 are provided with two groups, corresponding to the laser emitter 4 and the brush device 5 respectively. The brush device 5 includes a motor 51 and a steel brush 52 fixedly connected to the output shaft of the motor 51. The steel brush 52 passes through the processing groove 31 and contacts the side of the outer conductor cut by the laser, so as to remove the outer conductor debris generated by the laser cutting.

[0043] The frame 1 is also provided with a high-pressure air blowing tool 6, the air outlet end of which is arranged toward the side where the outer conductor is cut, so as to clean the outer conductor debris. The high-pressure air blowing tool 6 can use an air blowing ring 61, through which the outer conductor passes, and a circle of air outlets is arranged on the inner side of the air blowing ring 61, so as to fully clean the outer conductor.

[0044] Specifically, a lateral moving assembly 41 is installed on the frame 1, and the movable end of the lateral moving assembly 41 is connected to the vertical moving assembly 42, and the movable end of the vertical moving assembly 42 is connected to the laser emitter 4. The lateral moving assembly 41 can adjust the distance between the laser emitter 4 and the outer conductor, thereby controlling the laser focus to achieve precise cutting, and the vertical moving assembly 42 can adjust the height of the laser emitter 4 to keep it consistent with the height of the corrugated semi-finished cable core, and accurately cut the shape of the slot. Both the lateral moving assembly 41 and the vertical moving assembly 42 can use a screw mechanism or a linear module.

[0045] In addition, the output end of the laser transmitter 4 can be swung in the horizontal direction to adjust the transmission angle.

[0046] Working principle: First, weld the outer conductor seamlessly into a round tube, and then use laser to cut slots on the outer conductor, which can make the outer conductor more round and reduce the deformation and wrinkles of the slots, thereby improving the performance of the cable. By wrapping 1-2 layers of highly flame-retardant and fireproof glass cloth tape or mica tape on the insulation layer, the insulation layer can be protected and the possibility of overheating damage can be reduced. It is also convenient for subsequent laser cutting and reduces the possibility of damage to the insulation layer caused by laser cutting. The corrugation method is used to form peaks and troughs with large differences in size, and there are more cavities in the outer conductor cavity, which increases the foaming degree of the insulation product and improves product performance. The laser cut holes in the outer conductor are on the side, which avoids the deformation of the outer conductor after the longitudinal wrapping of the copper tape process, and can intuitively see the shape and size of the outer conductor after laser cutting. By setting the lateral moving component 41 and the vertical moving component 42, the lateral moving component 41 can adjust the distance between the laser emitter 4 and the outer conductor, thereby controlling the laser focus to achieve precise cutting, and the vertical moving component 42 can adjust the height of the laser emitter 4, thereby keeping it consistent with the height of the corrugated semi-finished cable core, and accurately cutting the shape of the slot.

[0047] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for producing a leaky coaxial cable, characterized in that: The steps include: S1, inner conductor welding; S2, foaming and extrusion to form an insulating layer; S3, seamless welding of outer conductor; S4, laser cutting holes in the external conductor using laser processing equipment; S5. Sheath processing.

2. A leaky coaxial cable production method according to claim 1, characterized in that: In step S2, 1-2 layers of highly flame-retardant fireproof glass cloth tape or mica tape are wrapped around the insulating layer.

3. A leaky coaxial cable production method according to claim 1, characterized in that: In step S3, when the outer conductor is seamlessly welded, a smooth copper strip is longitudinally wrapped outside the insulating layer, and the joints of the copper strips are welded by argon arc welding to form a sealed metal tube structure. The outer conductor is corrugated by high-speed corrugating equipment to form a ring-shaped outer conductor structure with peaks and troughs.

4. A leaky coaxial cable production method according to claim 1, characterized in that: The laser processing equipment comprises a frame (1), a fixing device (2), a limiting mold (3) and a laser emitter (4); the fixing device (2) is arranged on the frame (1) and is detachably connected to the limiting mold (3); the limiting mold is for an outer conductor to pass through; the laser emitter (4) is synchronized with a sheath pulling device signal so that laser cutting and movement of the outer conductor are performed synchronously.

5. A method for producing a leaky coaxial cable according to claim 4, characterized in that: A processing groove (31) is provided on the side wall of the limiting mold (3), and the laser emitted by the laser emitter (4) passes through the processing groove (31) and is emitted onto the outer conductor.

6. A leaky coaxial cable production method as claimed in claim 5, characterized in that: The frame (1) is provided with a brush device (5), and the brush device (5) cleans the cut outer conductor to remove the outer conductor debris generated by the cutting.

7. A method for producing a leaky coaxial cable according to claim 6, characterized in that: The frame (1) is provided with a high-pressure air blowing tool (6), and the air outlet end of the high-pressure air blowing tool (6) is arranged toward the side where the outer conductor is cut, so as to clean the outer conductor debris.

8. A method for producing a leaky coaxial cable according to claim 7, characterized in that: The frame (1) is provided with a transverse moving component (41), and the movable end of the transverse moving component (41) is connected to the laser emitter (4) to adjust the distance between the laser emitter (4) and the outer conductor.

9. A method for producing a leaky coaxial cable according to claim 8, characterized in that: The movable end of the lateral moving component (41) is connected to a vertical moving component (42), and the movable end of the vertical moving component (42) is connected to a laser emitter (4) to adjust the height of the laser emitter (4).

10. A leaky coaxial cable production method as claimed in claim 8, characterized in that: The output end of the laser emitter (4) can swing in the horizontal direction to adjust the emission angle.

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