Constant-tension pay-off device for optical fibers

Abstract

The invention discloses a constant tension pay-off device for an optical fiber, and relates to the technical field of optical fiber communication, the constant tension pay-off device comprises a bottom plate, a pay-off rack is fixed on one side of the top of the bottom plate, a pay-off roller is rotatably connected to the pay-off rack, and the optical fiber is wound on the pay-off roller; the top of the bottom plate is provided with a constant tension control mechanism for controlling the tension of the optical fiber in a pay-off process; the constant tension control mechanism comprises two fixing blocks fixed to the top of the bottom plate. The invention relates to the technical field of optical fiber communication. According to the constant-tension pay-off device for the optical fiber, the constant-tension control mechanism is arranged, the driving roller and the driven roller are used for pressing the optical fiber, the position of the lower pressing roller is further adjusted, so that the lower pressing roller downwards presses the optical fiber, the optical fiber keeps constant tension in the pay-off process, meanwhile, the tension adjusting assembly can be used for controlling the pressing amplitude of the lower pressing roller, and the pay-off efficiency is improved. When different types of optical fibers are paid off, different constant tensions can be adjusted for paid off, and the use of different types of optical fibers is met.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber communication, in particular to a constant tension pay-off device for optical fiber. Background Art

[0002] In the process of building and maintaining optical fiber communication networks, laying optical fiber is a crucial link. Traditional pay-off devices often have difficulty maintaining constant tension during the pay-off process. As the optical fiber is gradually released, the tension will gradually change, which will affect the quality and efficiency of laying the optical fiber.

[0003] Referring to the Chinese patent, the application number is "202010538059.1" "Constant tension pay-off device", which achieves the purpose of constant tension of the supporting wire during pay-off, automatically adjusting the tension, ensuring the tightness of the supporting wire wound on the winding device, and automatically aligning the tension applying device. However, the existing optical fiber pay-off device has the following shortcomings: (1) Since the type of optical fiber affects the maximum tension it can withstand, different constant tensions need to be controlled when paying out different types of optical fibers. It is difficult to adjust different constant tensions in existing pay-out devices. (2) During the pay-out process, especially over long distances, optical fibers will encounter greater frictional resistance, which can easily wear out the outer sheath of the optical fiber. (3) There are dust and impurities on the outer sheath of the optical fiber. If it is not cleaned up, it is easy to scratch the outer sheath when laying out the line, exposing the optical fiber inside and affecting the transmission effect; Therefore, we propose a constant tension pay-off device for optical fiber to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a constant tension pay-off device for optical fiber, which solves the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A constant tension pay-off device for optical fiber, comprising a bottom plate, a pay-off frame is fixed on one side of the top of the bottom plate, a pay-off roller is rotatably connected to the pay-off frame, an optical fiber is wound on the pay-off roller, and a constant tension control mechanism for controlling the tension of the optical fiber during the pay-off process is arranged on the top of the bottom plate; The constant tension control mechanism includes two fixed blocks fixed on the top of the base plate, two vertical rods are fixed on the top of the two fixed blocks, a slide seat is slidably connected between the outer surfaces of the two vertical rods, a horizontal plate is fixed between the tops of the four vertical rods, a circular plate is fixed on the outer surface of the vertical rod, a spring 1 is sleeved on the outer surface of the vertical rod, the top of the spring 1 is fixed to the bottom of the circular plate, and the bottom of the spring 1 is fixed to the top of the slide seat, one side of the two slide seats is rotatably connected to a driving roller through a rotating shaft, one side of the two fixed blocks is rotatably connected to a driven roller, the two driving rollers are driven to rotate by a driving assembly, and a tension adjustment assembly for controlling the tension when the optical fiber is released is provided at the bottom of the horizontal plate.

[0006] Preferably, the driving assembly includes a square plate fixed on one side of the slide, a motor is fixed on the top of the square plate, the motor drives the rotating shaft to rotate, pulleys are fixed on both rotating shafts, and the two pulleys are connected by belt transmission.

[0007] Preferably, the tension adjustment assembly includes a fixed box fixed to the bottom of the horizontal plate, a vertical groove is opened on one side of the fixed box, a screw rod is rotatably connected between the opposite sides of the inner wall of the fixed box, a moving block is slidably connected between the inner surfaces of the fixed box, one end of the screw rod passes through the moving block and extends to the outside of the moving block, and the outer surface of the screw rod is threadedly connected to the inner surface of the moving block.

[0008] Preferably, an L-shaped plate is fixed on one side of the moving block, the outer surface of the L-shaped plate is slidably connected to the inner surface of the vertical groove, one side of the L-shaped plate is rotatably connected to a lower pressure roller via a pin shaft, the outer surface of the screw rod is fixed with a bevel gear 1, one side of the fixed box is rotatably connected with a rotating rod, one end of the rotating rod extends to the interior of the fixed box, one end of the rotating rod is fixed with a bevel gear 2, the bevel gear 1 is meshed with the bevel gear 2, and the other end of the rotating rod is fixed with a rotating block.

[0009] Preferably, the L-shaped plate is provided with an oiling unit for applying lubricating oil to the surface of the lower pressure roller, and the oiling unit includes an oil storage tank fixed on the top of the L-shaped plate, the top of the oil storage tank is connected to an oil inlet pipe, one side of the oil storage tank is connected to a bent pipe, an oil-absorbing cotton swab is inserted into the bottom end of the bent pipe, and the bottom end of the oil-absorbing cotton swab is in contact with the surface of the lower pressure roller.

[0010] Preferably, the fixing box is also provided with a limit protection component to prevent the optical fiber from being broken due to excessive downward pressure, and the limit protection component includes a limit plate slidably connected to one side of the fixing box, a fixing strip is fixed to one side of the limit plate, one side of the fixing strip is slidably connected to one side of the fixing box, a mounting seat is fixed to one side of the fixing box, a threaded rod is rotatably connected to the inner surface of the mounting seat, the top end of the threaded rod passes through the fixing strip and extends to the outside of the fixing strip, the outer surface of the threaded rod is threadedly connected to the inner surface of the fixing strip, a rotating handle is fixed to the bottom end of the threaded rod, and a baffle is fixed to one side of the fixing box, and the top end of the threaded rod is rotatably connected to the bottom of the baffle.

[0011] Preferably, a cleaning and scraping assembly for scraping and cleaning dust impurities and excess lubricating oil on the optical fiber is provided on one side of the top of the base plate, and the cleaning and scraping assembly includes a cleaning seat fixed on the top of the base plate, a conical groove is provided inside the cleaning seat, a wire hole is also provided inside the cleaning seat, the wire hole is connected to the conical groove, the top and bottom of the conical groove are provided with through grooves connected thereto, support plates are fixed on both sides of the inner wall of the cleaning seat, filter screens are placed on the tops of the two support plates, an oil collecting box is slidably connected to the bottom wall of the cleaning seat, and a seat door is rotatably connected to one side of the cleaning seat through a hinge.

[0012] Preferably, a push-type unblocking component for unblocking the lower through slot is provided on the top of the cleaning seat, and the push-type unblocking component includes a plug plate slidably connected to the inside of the upper through slot, the bottom of the plug plate extends to the inside of the lower through slot, and a connecting plate is extended and fixed on the top of the plug plate, and a total of four springs are fixed on both sides of the bottom of the connecting plate, and the bottom ends of the four springs are fixed to the top of the cleaning seat, and a pressing handle is fixed on the top of the connecting plate.

[0013] The present invention provides a constant tension pay-off device for optical fiber. Compared with the prior art, it has the following beneficial effects: (1) By setting up a constant tension control mechanism, the driving roller and the driven roller are used to press the optical fiber, and the position of the lower pressing roller is further adjusted to make the lower pressing roller press the optical fiber downward, so that the optical fiber maintains a constant tension during the pay-off process. At the same time, the downward pressure amplitude of the lower pressing roller can be controlled by the tension adjustment component. When paying out different types of optical fibers, different constant tensions can be adjusted to meet the use of different types of optical fibers.

[0014] (2) By setting the limit protection component, the position of the limit plate is adjusted to limit the downward pressure of the pressing roller. When pressing down on different types of optical fibers, the position of the limit plate can be pre-adjusted according to the maximum pressure that the optical fiber can withstand, to prevent the pressing roller from moving down too much and breaking the optical fiber, thereby providing anti-breaking protection for the optical fiber.

[0015] (3) By setting up the oiling unit, the lubricating oil is absorbed by an oil-absorbing cotton swab and then applied to the lower pressure roller. During the rolling process of the lower pressure roller, the lubricating oil is applied to the optical fiber, thereby reducing the friction resistance on the surface of the optical fiber during the laying-out process and reducing the probability of wear on the outer skin of the optical fiber.

[0016] (4) By setting up the cleaning and scraping oil component, during the optical fiber laying process, the conical groove is used to scrape off the excess lubricating oil and dust impurities on the optical fiber, so that the lubricating oil and dust impurities flow through the through groove to the filter screen. After filtering, the dust impurities remain on the top of the filter screen, and the lubricating oil flows into the oil collecting box for collection. This not only realizes the collection of excess lubricating oil coated on the optical fiber surface, but also cleans the dust and impurities on the optical fiber surface, preventing the dust impurities on the optical fiber outer skin from scratching the outer skin.

[0017] (5) By setting up the push-type unblocking component, the lubricating oil and dust impurities blocked in the lower through groove can be unblocked, and the blocked lubricating oil and dust impurities can be pushed into the filter net for filtration to ensure the unblocked flow of the lower through groove. At the same time, the spring can reset the plug plate. The unblocking operation is simple and flexible, and the unblocking effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the external structure of the present invention; Figure 2 It is a three-dimensional diagram of the constant tension control mechanism of the present invention; Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A; Figure 4 It is a rear view of the constant tension control mechanism of the present invention; Figure 5 It is a cross-sectional view of a fixing box of the present invention; Figure 6 It is a cross-sectional view of the cleaning seat of the present invention; Figure 7 It is a three-dimensional diagram of the push-type unblocking component of the present invention.

[0019] In the figure: 1, bottom plate; 2, pay-off frame; 3, pay-off roller; 4, optical fiber; 5, constant tension control mechanism; 6, drive assembly; 7, tension adjustment assembly; 8, oiling unit; 9, limit protection assembly; 10, cleaning and scraping oil assembly; 11, push-type plugging assembly; 51, fixed block; 52, vertical rod; 53, slide seat; 54, horizontal plate; 55, round plate; 56, spring 1; 57, rotating shaft; 58, driving roller; 59, driven roller; 61, square plate; 62, motor; 63, pulley; 64, belt; 71, fixed box; 72, vertical slot; 73, screw rod; 74, moving block; 75, L Mould plate; 76, lower pressure roller; 77, bevel gear one; 78, rotating rod; 79, bevel gear two; 710, rotating block; 81, oil storage tank; 82, oil inlet pipe; 83, elbow; 84, oil absorbing cotton swab; 91, limit plate; 92, fixing strip; 93, mounting seat; 94, threaded rod; 95, rotating handle; 96, baffle; 101, cleaning seat; 102, conical groove; 103, wire hole; 104, through groove; 105, support plate; 106, filter screen; 107, oil collecting box; 108, seat door; 111, plug plate; 112, connecting plate; 113, spring two; 114, pressing handle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides three technical solutions, including the following embodiments: Example 1

[0022] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 A constant tension pay-off device for optical fiber, comprising a bottom plate 1, a pay-off frame 2 is fixed on one side of the top of the bottom plate 1, a pay-off roller 3 is rotatably connected to the pay-off frame 2, an optical fiber 4 is wound on the pay-off roller 3, a constant tension control mechanism 5 for controlling the tension of the optical fiber 4 during the pay-off process is arranged on the top of the bottom plate 1, one end of the optical fiber 4 passes through the constant tension control mechanism 5 and then passes through the cleaning seat 101 for pay-off; The constant tension control mechanism 5 includes two fixed blocks 51 fixed on the top of the base plate 1, two vertical rods 52 are fixed on the top of the two fixed blocks 51, a slide seat 53 is slidably connected between the outer surfaces of the two vertical rods 52, a horizontal plate 54 is fixed between the tops of the four vertical rods 52, a circular plate 55 is fixed on the outer surface of the vertical rod 52, a spring 56 is sleeved on the outer surface of the vertical rod 52, the top of the spring 56 is fixed to the bottom of the circular plate 55, and the bottom of the spring 56 is fixed to the top of the slide seat 53, one side of the two slide seats 53 is rotatably connected to a driving roller 58 through a rotating shaft 57, one side of the two fixed blocks 51 is rotatably connected to a driven roller 59, the optical fiber 4 passes through the driving roller 58 and the driven roller 59, and the rotation of the driving roller 58 drives the optical fiber 4 to move to the right for laying out, the two driving rollers 58 are driven to rotate by the driving component 6, and a tension adjustment component 7 for controlling the tension of the optical fiber 4 when laying out is provided at the bottom of the horizontal plate 54.

[0023] The driving assembly 6 includes a square plate 61 fixed on one side of the slide 53, and a motor 62 is fixed on the top of the square plate 61. The motor 62 is controlled by an external switch and is electrically connected to an external power supply. The motor 62 drives the rotating shaft 57 to rotate. The output end of the motor 62 is fixed to a section of the rotating shaft 57 through a coupling. Pulleys 63 are fixed on the two rotating shafts 57, and the two pulleys 63 are connected by a belt 64.

[0024] The tension adjustment assembly 7 includes a fixed box 71 fixed to the bottom of the horizontal plate 54, a vertical groove 72 is opened on one side of the fixed box 71, a screw rod 73 is rotatably connected between the opposite sides of the inner wall of the fixed box 71, a moving block 74 is slidably connected between the inner surfaces of the fixed box 71, one end of the screw rod 73 passes through the moving block 74 and extends to the outside of the moving block 74, and the outer surface of the screw rod 73 is threadedly connected to the inner surface of the moving block 74.

[0025] An L-shaped plate 75 is fixed to one side of the moving block 74, and the outer surface of the L-shaped plate 75 is slidably connected to the inner surface of the vertical groove 72. A lower pressure roller 76 is rotatably connected to one side of the L-shaped plate 75 through a pin shaft. When the lower pressure roller 76 moves downward, it drives the optical fiber 4 to be squeezed downward, thereby increasing the tension of the optical fiber 4 when it is re-released. A bevel gear 1 77 is fixed to the outer surface of the screw rod 73, and a rotating rod 78 is rotatably connected to one side of the fixed box 71. One end of the rotating rod 78 is fixed to a bevel gear 2 79, and the bevel gear 1 77 is meshed with the bevel gear 2 79. The other end of the rotating rod 78 is fixed to a rotating block 710.

[0026] By setting up the constant tension control mechanism 5, the driving roller 58 and the driven roller 59 are used to press the optical fiber 4, and further by adjusting the position of the lower pressing roller 76, the lower pressing roller 76 presses the optical fiber 4 downward, so that the optical fiber 4 maintains a constant tension during the pay-off process. At the same time, the downward pressure amplitude of the lower pressing roller 76 can be controlled by the tension adjustment component 7. When paying out different types of optical fibers, different constant tensions can be adjusted for pay-off, thereby meeting the use of different types of optical fibers.

[0027] Example 2

[0028] Based on Example 1, see Figure 3 As shown, an oiling unit 8 for applying lubricating oil to the surface of the lower pressure roller 76 is provided on the L-shaped plate 75. The oiling unit 8 includes an oil storage tank 81 fixed on the top of the L-shaped plate 75. The top of the oil storage tank 81 is connected to an oil inlet pipe 82, and the lubricating oil is introduced into the oil storage tank 81 through the oil inlet pipe 82 for storage. One side of the oil storage tank 81 is connected to a curved pipe 83, and the curved pipe 83 can output a small amount of lubricating oil. An oil-absorbing cotton swab 84 is inserted into the bottom end of the curved pipe 83. The oil-absorbing cotton swab 84 absorbs part of the lubricating oil in the curved pipe 83, and the bottom end of the oil-absorbing cotton swab 84 contacts the surface of the lower pressure roller 76. When the lower pressure roller 76 rotates, the lubricating oil on the oil-absorbing cotton swab 84 is applied to the lower pressure roller 76, and the lubricating oil on the lower pressure roller 76 is applied to the optical fiber 4 during the rotation process.

[0029] By setting up the oiling unit 8, the lubricating oil is absorbed by the oil-absorbing cotton swab 84 and then applied to the lower pressure roller 76. The lubricating oil is applied to the optical fiber 4 during the rolling of the lower pressure roller 76, thereby reducing the friction resistance on the surface of the optical fiber 4 during the laying-out process, and reducing the probability of wear on the outer skin of the optical fiber 4.

[0030] The fixing box 71 is also provided with a limit protection component 9 to prevent the optical fiber 4 from being broken due to excessive downward pressure. The limit protection component 9 includes a limit plate 91 slidably connected to one side of the fixing box 71. The function of the limit plate 91 is to prevent the lower pressure roller 76 from moving downward excessively, thereby protecting the optical fiber 4 from being broken. A fixing bar 92 is fixed to one side of the limit plate 91, and one side of the fixing bar 92 is slidably connected to one side of the fixing box 71. A mounting seat 93 is fixed to one side of the fixing box 71. A threaded rod 94 is rotatably connected to the inner surface of the mounting seat 93. The top end of the threaded rod 94 passes through the fixing bar 92 and extends to the outside of the fixing bar 92. The outer surface of the threaded rod 94 is threadedly connected to the inner surface of the fixing bar 92. A rotating handle 95 is fixed to the bottom end of the threaded rod 94. A baffle 96 is fixed to one side of the fixing box 71, and the top end of the threaded rod 94 is rotatably connected to the bottom of the baffle 96.

[0031] Example 3

[0032] Based on Example 2, see Figure 6-Figure 7As shown, a cleaning and scraping assembly 10 for scraping and cleaning dust impurities and excess lubricating oil on the optical fiber 4 is arranged on one side of the top of the bottom plate 1. The cleaning and scraping assembly 10 comprises a cleaning seat 101 fixed on the top of the bottom plate 1. The upper half of the cleaning seat 101 is solid, and the lower half is a cavity. A conical groove 102 is provided inside the cleaning seat 101. The tip of the conical groove 102 is adapted to the size of the optical fiber 4. The setting of the conical groove 102 can scrape off excess lubricating oil and dust impurities on the surface of the optical fiber 4. The cleaning seat 101 is provided with a conical groove 102. The part is also provided with a wire hole 103, which is connected to the conical groove 102. The top and bottom of the conical groove 102 are provided with through grooves 104 connected thereto. Support plates 105 are fixed on both sides of the inner wall of the cleaning seat 101. Filter screens 106 are placed on the tops of the two support plates 105. The filter screens 106 can filter dust and impurities in the lubricating oil. An oil collecting box 107 is slidably connected to the bottom wall of the cleaning seat 101. The oil collecting box 107 is used to collect excess lubricating oil. One side of the cleaning seat 101 is rotatably connected to a seat door 108 through a hinge.

[0033] By setting up the cleaning scraper assembly 10, during the laying-out process of the optical fiber 4, the conical groove 102 is used to scrape off excess lubricating oil and dust impurities on the optical fiber 4, so that the lubricating oil and dust impurities flow to the filter through the through groove 104, and the dust impurities are left on the top of the filter 106 after filtration, and the lubricating oil flows into the oil collecting box 107 for collection, which not only realizes the collection of excess lubricating oil coated on the surface of the optical fiber 4, but also cleans the dust and impurities on the surface of the optical fiber 4, preventing the dust impurities on the outer skin of the optical fiber 4 from scratching the outer skin.

[0034] A push-type unblocking component 11 for unblocking the lower through slot 104 is provided on the top of the cleaning seat 101. The push-type unblocking component 11 includes an insert plate 111 slidably connected to the inside of the upper through slot 104. When the insert plate 111 moves downward, it can be inserted into the lower through slot 104 to unblock the through slot 104. The bottom of the insert plate 111 extends to the inside of the lower through slot 104. A connecting plate 112 is extended and fixed to the top of the insert plate 111. A total of four springs 113 are fixed on both sides of the bottom of the connecting plate 112. The bottom ends of the four springs 113 are fixed to the top of the cleaning seat 101. A pressing handle 114 is fixed to the top of the connecting plate 112.

[0035] By setting the push-type unblocking component 11, the lubricating oil and dust impurities blocked in the lower through groove 104 can be unblocked, and the blocked lubricating oil and dust impurities are pushed into the filter 106 for filtration, thereby ensuring the unblocking of the lower through groove 104. At the same time, the spring 113 can reset the plug plate 111. The unblocking operation mode is simple and flexible, and the unblocking effect is good.

[0036] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] During operation, the optical fiber 4 on the pay-off roller 3 passes through the driving roller 58 and the driven roller 59, the slide seat 53 is lifted upward, and the elastic force of the spring 56 is used to press the optical fiber 4, and the optical fiber 4 is further passed through the tapered groove 102 and the wire hole 103, and the motor 62 is started, so that the motor 62 drives the two driving rollers 58 to rotate, and further drives the optical fiber 4 to transmit to the right, and the rotating block 710 is rotated to make the rotating block 710 drive the screw rod 73 to rotate, and further the screw rod 73 drives the moving block 74, the L-shaped plate 75 and the lower pressure roller 76 to move downward, and further the lower pressure roller 76 presses the optical fiber 4 downward to increase the tension of the optical fiber 4 when the pay-off is performed, and at the same time the oil-absorbing cotton swab 84 absorbs the lubricating oil in the oil storage tank 81, and when the lower pressure roller 76 rotates, the oil-absorbing cotton swab 84 applies the lubricating oil to the lower pressure roller 76, and further the lower pressure roller 76 applies the lubricating oil to the optical fiber 4, through The rotating handle 95 is turned to make the rotating handle drive the threaded rod 94 to rotate, and the threaded rod 94 drives the fixing bar 92 and the limit plate 91 to slide upward, and the change in the position of the limit plate 91 is used to control the downward movement of the L-shaped plate 75 and the lower pressure roller 76, thereby preventing the lower pressure roller 76 from excessively moving downward and breaking the optical fiber 4. When the optical fiber 4 passes through the conical groove 102, the conical groove 102 scrapes off the excess lubricating oil and dust impurities on the surface of the optical fiber 4, and the lubricating oil carries the dust impurities through the lower through groove 104 and falls on the filter 106 for filtration, leaving the dust impurities on the top of the filter 106, and the lubricating oil falls into the oil collecting box 107 for collection. When the lower through groove 104 is blocked, the pressing handle 114 is pressed to make the pressing handle 114 drive the plug plate 111 to be inserted into the lower through groove 104, and the lubricating oil and dust impurities are pushed onto the filter 106.

[0038] The above embodiments of the invention are described in detail, but the contents are only preferred embodiments of the invention and cannot be considered to limit the scope of the invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of the invention.

Claims

1. A constant tension pay-off device for optical fiber, comprising a bottom plate (1), characterized in that: A pay-off frame (2) is fixed to one side of the top of the bottom plate (1), a pay-off roller (3) is rotatably connected to the pay-off frame (2), an optical fiber (4) is wound on the pay-off roller (3), and a constant tension control mechanism (5) for controlling the tension of the optical fiber (4) during the pay-off process is arranged on the top of the bottom plate (1); The constant tension control mechanism (5) comprises two fixed blocks (51) fixed on the top of the bottom plate (1), two vertical rods (52) are fixed on the top of the two fixed blocks (51), a sliding seat (53) is slidably connected between the outer surfaces of the two vertical rods (52), a horizontal plate (54) is fixed between the tops of the four vertical rods (52), a circular plate (55) is fixed on the outer surface of the vertical rod (52), and a spring (56) is sleeved on the outer surface of the vertical rod (52), and the spring (56) ) is fixed to the bottom of the circular plate (55), the bottom end of the spring one (56) is fixed to the top of the slide seat (53), one side of the two slide seats (53) is rotatably connected to a driving roller (58) via a rotating shaft (57), one side of the two fixed blocks (51) is rotatably connected to a driven roller (59), the two driving rollers (58) are driven to rotate by a driving component (6), and a tension adjustment component (7) for controlling the tension of the optical fiber (4) when the optical fiber (4) is released is provided at the bottom of the horizontal plate (54); The tension adjustment component (7) comprises an oiling unit (8) for applying lubricating oil to the surface of the lower pressing roller (76), and a limit protection component (9) for preventing the optical fiber (4) from being broken due to excessive downward pressure.

2. The constant tension pay-off device for optical fiber according to claim 1, characterized in that: The driving assembly (6) comprises a square plate (61) fixed to one side of the slide seat (53), a motor (62) being fixed to the top of the square plate (61), the motor (62) driving the rotating shaft (57) to rotate, a pulley (63) being fixed to both rotating shafts (57), and the two pulleys (63) being connected to each other via a belt (64).

3. The constant tension pay-off device for optical fiber according to claim 1, characterized in that: The tension adjustment assembly (7) comprises a fixed box (71) fixed to the bottom of the horizontal plate (54), a vertical groove (72) is formed on one side of the fixed box (71), a screw rod (73) is rotatably connected between opposite sides of the inner wall of the fixed box (71), a moving block (74) is slidably connected between the inner surfaces of the fixed box (71), one end of the screw rod (73) passes through the moving block (74) and extends to the outside of the moving block (74), and the outer surface of the screw rod (73) is threadedly connected to the inner surface of the moving block (74).

4. The constant tension pay-off device for optical fiber according to claim 3, characterized in that: An L-shaped plate (75) is fixed to one side of the moving block (74), the outer surface of the L-shaped plate (75) is slidably connected to the inner surface of the vertical groove (72), one side of the L-shaped plate (75) is rotatably connected to a lower pressure roller (76) via a pin shaft, the outer surface of the screw rod (73) is fixed to a bevel gear 1 (77), one side of the fixed box (71) is rotatably connected to a rotating rod (78), one end of the rotating rod (78) extends to the interior of the fixed box (71), one end of the rotating rod (78) is fixed to a bevel gear 2 (79), the bevel gear 1 (77) is meshed with the bevel gear 2 (79), and the other end of the rotating rod (78) is fixed to a rotating block (710).

5. The constant tension pay-off device for optical fiber according to claim 4, characterized in that: The oiling unit (8) comprises an oil storage tank (81) fixed on the top of the L-shaped plate (75); the top of the oil storage tank (81) is connected to an oil inlet pipe (82); one side of the oil storage tank (81) is connected to a curved pipe (83); an oil-absorbing cotton swab (84) is inserted into the bottom end of the curved pipe (83); and the bottom end of the oil-absorbing cotton swab (84) is in contact with the surface of the lower pressure roller (76).

6. The constant tension pay-off device for optical fiber according to claim 3, characterized in that: The position limiting protection assembly (9) comprises a position limiting plate (91) slidably connected to one side of the fixing box (71); a fixing bar (92) is fixed to one side of the position limiting plate (91); one side of the fixing bar (92) is slidably connected to one side of the fixing box (71); a mounting seat (93) is fixed to one side of the fixing box (71); a threaded rod (94) is rotatably connected to the inner surface of the mounting seat (93); the top end of the threaded rod (94) passes through the fixing bar (92) and extends to the outside of the fixing bar (92); the outer surface of the threaded rod (94) is threadedly connected to the inner surface of the fixing bar (92); a rotating handle (95) is fixed to the bottom end of the threaded rod (94); a baffle (96) is fixed to one side of the fixing box (71); the top end of the threaded rod (94) is rotatably connected to the bottom of the baffle (96).

7. The constant tension pay-off device for optical fiber according to claim 1, characterized in that: A cleaning and scraping assembly (10) for scraping and cleaning dust impurities and excess lubricating oil on the optical fiber (4) is arranged on one side of the top of the base plate (1). The cleaning and scraping assembly (10) comprises a cleaning seat (101) fixed on the top of the base plate (1). A conical groove (102) is provided inside the cleaning seat (101). A wire hole (103) is also provided inside the cleaning seat (101). The wire hole (103) is connected to the conical groove (102). The top and bottom of the conical groove (102) are both provided with through grooves (104) connected thereto. Support plates (105) are fixed on both sides of the inner wall of the cleaning seat (101). Filter screens (106) are placed on the tops of the two support plates (105). An oil collecting box (107) is slidably connected to the bottom wall of the cleaning seat (101). A seat door (108) is rotatably connected to one side of the cleaning seat (101) via a hinge.

8. The constant tension pay-off device for optical fiber according to claim 7, characterized in that: The top of the cleaning seat (101) is provided with a push-type unblocking assembly (11) for unblocking the lower through slot (104), the push-type unblocking assembly (111) comprising a plug plate (111) slidably connected to the interior of the upper through slot (104), the bottom of the plug plate (111) extending to the interior of the lower through slot (104), a connecting plate (112) extending and fixed to the top of the plug plate (111), a total of four springs (113) fixed to both sides of the bottom of the connecting plate (112), the bottom ends of the four springs (113) fixed to the top of the cleaning seat (101), and a pressing handle (114) fixed to the top of the connecting plate (112).

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