A system and method for impregnating FRP tendon fiber bundles

Abstract

The application discloses a kind of production FRP tendon fiber bundle impregnation system, including: impregnation tank body, including being equipped with for fiber bundle impregnation glue liquid tank body, lifting mechanism is arranged on the tank body and is used to control the movement of winding mechanism;Winding mechanism includes;Mounting bracket, for cross-shaped structure, the horizontal part of mounting bracket two sides are respectively connected with mounting sleeve, mounting sleeve is connected with wire wheel by mounting plate;The vertical part of mounting bracket two sides are respectively connected with impregnation wheel group and pressure roller assembly, and, mounting bracket is located on the same side of pressure roller assembly and is provided with drying oven;Mounting bracket is provided with connecting mechanism, connecting mechanism includes: mounting sleeve, mounting sleeve is slidably arranged on mounting bracket, the first impregnation wheel of impregnation wheel group is slidably arranged on mounting bracket by slide plate, the first pressure roller of pressure roller assembly is slidably installed on the vertical part of mounting bracket, by setting the impregnation system of connecting mechanism, with being convenient to adjust, it is suitable for different thickness fiber bundle impregnation work.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of FRP (Fiber Reinforced Polymer) bars, and particularly relates to a fiber bundle impregnation system for producing FRP bars and an impregnation method. BACKGROUND

[0002] A composite FRP bar preparation device is disclosed in Chinese Patent CN105415712B, which comprises a yarn feeding device, an impregnation device, a forming device, a heating and curing device, a traction device, a cutting device and a length control device. The yarn feeding device of the composite FRP bar preparation device is provided with a yarn pressing roller and a yarn hole, so that the fiber bundles are in a tensioned state. The forming device greatly improves the uniformity of the distribution of the fiber bundles in the thermosetting resin. The heating and curing device stabilizes the curing temperature and is easy to produce. The buzzer of the length control device can remind the operator to cut;

[0003] In the prior art, the equipment in the fiber bundle impregnation system of the FRP bar is installed in a horizontal layout mode. There are problems of large floor space. When the thickness specifications of the fiber bundles are different, the apertures of the respective equipment need to be adjusted one by one to adapt to the fiber bundles, and then the impregnation work is performed. Therefore, the fiber bundle impregnation system has the problem of inconvenient adjustment when impregnating fiber bundles with different thickness specifications. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art, and to provide a fiber bundle impregnation system for producing FRP bars and an impregnation method.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A fiber bundle impregnation system for producing FRP bars comprises:

[0007] The impregnation tank body comprises a tank body for impregnating fiber bundles with glue solution. A lifting mechanism is arranged on the tank body to control the movement of the winding mechanism.

[0008] The winding mechanism comprises:

[0009] The mounting bracket is in a cross-shaped structure. The horizontal part of the mounting bracket is connected with mounting sleeves on both sides. The mounting sleeves are connected with wire wheels through mounting plates. The vertical part of the mounting bracket is connected with an impregnation wheel set and a pressure wheel assembly on both sides. An oven is arranged on the same side of the pressure wheel assembly.

[0010] A connecting mechanism is arranged on the mounting bracket. The connecting mechanism comprises:

[0011] The mounting sleeves are slidingly arranged on the mounting bracket. The first impregnation wheel of the impregnation wheel set is slidingly arranged on the mounting bracket through a sliding plate. The first pressure wheel of the pressure wheel assembly is slidingly arranged above the vertical part of the mounting bracket through a sliding block.

[0012] The device has four movable rods. The two ends of the upper movable rod are connected to the mounting sleeve and the slider, respectively, while the two ends of the lower movable rod are connected to the mounting sleeve and the slide plate, respectively.

[0013] As a further aspect of the present invention, the lifting mechanism is driven by a cylinder.

[0014] As a further aspect of the present invention: the impregnation wheel assembly includes a first impregnation wheel and a second impregnation wheel, both of which are mounted on a mounting frame, with the first impregnation wheel located above the second impregnation wheel, and a fiber bundle through groove provided between the first impregnation wheel and the second impregnation wheel.

[0015] As a further aspect of the present invention: a fiber bundle threading groove is provided above the vertical part of the mounting frame, and a pressure roller assembly is located in the fiber bundle threading groove. The pressure roller assembly includes a first pressure roller and a second pressure roller, with the second pressure roller located above the first pressure roller. The first pressure roller and the second pressure roller are spaced apart in the fiber bundle threading groove.

[0016] As a further aspect of the present invention: the mounting sleeve is connected to the adjustment mechanism, the adjustment mechanism is mounted on the crossbeam, and the adjustment mechanism includes:

[0017] Two mounting blocks that move in opposite directions, each mounting block has a vertically mounted mounting rod that is connected to a mounting sleeve.

[0018] As a further aspect of the present invention: a plurality of heating rings are provided inside the drying oven, and the heating rings are connected to a telescopic mechanism, which is used to change the length of the heating path of the heating rings.

[0019] As a further aspect of the present invention: the telescopic mechanism includes:

[0020] Hollow panels are arranged at equal intervals and located at the bottom of the drying oven. Multiple hollow panels are fitted onto the limiting rod and are connected to each other by a movable connecting plate.

[0021] As a further aspect of the present invention: the hollow plate away from the pressure roller assembly is fixed to the inner wall of the drying oven by a connecting rod, and the hollow plate close to the pressure roller assembly is provided with a connecting block;

[0022] The connecting block is connected to one end of the connecting shaft, and the other end of the connecting shaft slides through the drying box and connects to the slider.

[0023] A method for impregnating FRP fiber bundles into a resin-impregnated system includes the following steps:

[0024] Step: according to the diameter specification of the fiber bundle, by controlling the work of the double shaft air cylinder, the two mounting blocks are moved along the cross beam, the two mounting sleeves are moved by the mounting rod, and the slide plate and the slide block are moved by the movable rod when the two mounting sleeves move towards each other, so as to adjust the distance between the first and second impregnation wheels and the distance between the first and second pressure wheels;

[0025] When the slide block moves, the connecting block moves through the connecting shaft, and the hollow plates are equally dispersed through the movable connecting plate, so that the heating ring moves to change the length of the drying path;

[0026] Step: after the FRP fiber bundle is wound along the line wheel on one side, the impregnation wheel set at the bottom and the line wheel on the other side, the impregnation wheel set applies pressure to the fiber bundle during impregnation, so that the fiber bundle is impregnated more thoroughly, enters the fiber bundle threading groove, and the excess glue on the surface of the fiber bundle is removed through the extrusion of the first and second pressure wheels, and then enters the drying box to complete the curing work.

[0027] The beneficial effects of the present application are:

[0028] The impregnation system of the present application comprises a U-shaped winding structure composed of the line wheels on the two mounting plates and the guide wheels at the bottom, which facilitates winding work and avoids the problem of troublesome winding at the beginning of impregnation in the prior art, in which the fiber bundle needs to pass through multiple winding wheels and be wound in an S shape by crossing each other; and a cross-shaped mounting frame that cross-distributes the winding structure, the pressure wheel degumming structure and the drying box, so that the cross-laid impregnation system has the advantages of small space ratio and compact connection between structures, and can quickly complete the overall process of impregnating the fiber bundle and improve the fiber bundle impregnation efficiency; effectively solves the problem of large occupied area of the equipment in the impregnation system in the prior art, which is installed in a horizontal layout mode;

[0029] The connecting mechanism of the present application can control the movement of the two mounting sleeves to increase the distance when the diameter of the fiber bundle increases, so that the thicker fiber bundle can be soaked in the groove for a longer time, and the corresponding impregnation wheel set and pressure wheel assembly can also complete the corresponding adjustment work to meet the thicker fiber bundle; therefore, the impregnation system provided by the present application is convenient to adjust and suitable for fiber bundle impregnation work of different thicknesses;

[0030] When the slider moves, the connecting block is driven to move through the connecting shaft, and the hollow plates are dispersed equidistantly through the movable connecting plate, so that the heating ring follows the movement, thereby changing the length of the drying path and further changing the drying time of the fiber bundle; therefore, when the fiber bundle after impregnation passes through the drying box, the drying path of the connecting mechanism will be increased or reduced, so that the drying box can change the curing time of the fiber bundle according to the thickness specification of the fiber bundle, so that when the thickness specification of the fiber bundle changes, the soaking time will also change accordingly, and the drying and curing time will also change accordingly. BRIEF DESCRIPTION OF DRAWINGS

[0031] The application will be further described below in combination with the drawings.

[0032] Figure 1 is a structural schematic diagram of the application;

[0033] Figure 2 is a structural schematic diagram of the impregnation tank body of the application;

[0034] Figure 3 is a structural schematic diagram of the winding mechanism of the application;

[0035] Figure 4 is a structural schematic diagram of the connection relationship between the winding mechanism and the connecting mechanism of the application;

[0036] Figure 5 is a structural schematic diagram of the drying box of the application;

[0037] Figure 6 is a structural schematic diagram of the extension mechanism of the application;

[0038] Figure 7 is a structural schematic diagram of the heating ring of the application.

[0039] In the figure: 1, impregnation tank body; 2, winding mechanism; 11, tank body; 12, support; 13, air cylinder; 14, cross beam; 15, double-shaft air cylinder; 16, mounting block; 17, mounting rod; 21, mounting frame; 22, mounting plate; 23, mounting sleeve; 24, wire wheel; 25, impregnation wheel set; 26, first pressure roller; 27, second pressure roller; 28, drying box; 281, heating ring; 282, extension mechanism; 2821, air pipe; 2822, hollow plate; 2823, connecting block; 2824, movable connecting plate; 2825, limiting rod; 29, connecting mechanism; 291, movable rod; 292, sliding plate; 293, slider; 294, connecting shaft. DETAILED DESCRIPTION

[0040] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0041] Embodiment 1

[0042] Please refer to Figures 1-3 The present application is a kind of production FRP tendon fiber bundle impregnation system, including impregnation tank 1, winding mechanism 2;

[0043] The winding mechanism 2 is arranged in the impregnation tank 1. In use, the fiber bundle for FRP tendon production will pass through the glue solution in the impregnation tank 1 along the winding mechanism 2 to complete the FRP tendon impregnation work;

[0044] The impregnation tank 1 includes tank 11, double shaft air cylinder 15; the tank 11 is provided with glue solution for fiber bundle soaking, and the tank 11 is provided with lifting mechanism for controlling the movement of the winding mechanism 2;

[0045] The lifting mechanism includes support 12, air cylinder 13, cross beam 14, the support 12 is arranged on the back wall of the tank 11, the air cylinder 13 is arranged on the support 12, and the output end of the air cylinder 13 is connected with the cross beam 14 for mounting the winding mechanism 2;

[0046] The winding mechanism 2 includes mounting bracket 21, mounting plate 22, mounting sleeve 23, wire wheel 24, impregnation wheel set 25, first pressure roller 26, second pressure roller 27, drying box 28;

[0047] The mounting bracket 21 is a cross structure, the mounting sleeve 23 is connected on both sides of the horizontal part of the mounting bracket 21, the end of the mounting sleeve 23 away from the mounting bracket 21 is connected with the middle part of the mounting plate 22, and the wire wheel 24 is connected on both sides of the mounting plate 22;

[0048] The vertical part of the mounting bracket 21 is connected with the impregnation wheel set 25 and the pressure roller assembly on both sides, and the drying box 28 is arranged on the same side of the pressure roller assembly, and the impregnation wheel set 25, the pressure roller assembly and the drying box 28 are in the same vertical plane;

[0049] The impregnation wheel set 25 includes first impregnation wheel and second impregnation wheel, the first impregnation wheel and the second impregnation wheel are arranged on the mounting bracket 21, the first impregnation wheel is above the second impregnation wheel, and the fiber bundle through groove is arranged between the first impregnation wheel and the second impregnation wheel;

[0050] The upper part of the vertical part of the mounting frame 21 is provided with a fiber bundle threading groove, and a pressure roller assembly is located in the fiber bundle threading groove.

[0051] The mounting sleeve 23 is arranged on the cross beam 14.

[0052] During operation, the FRP fiber bundle is wound along the line wheel 24 on one side, the impregnation wheel set 25 at the bottom, and the line wheel 24 on the other side, wherein the impregnation wheel set 25 applies pressure to the fiber bundle during impregnation, so that the fiber bundle is more thoroughly impregnated, enters the fiber bundle threading groove, is extruded by the first pressure roller 26 and the second pressure roller 27 to remove excess glue on the surface of the fiber bundle, and then enters the drying box 28 to complete the curing work.

[0053] Therefore, the impregnation system has the advantages that the U-shaped winding structure is formed by the line wheel 24 on the two side mounting plates 22 and the guide wheel at the bottom, which facilitates winding work and avoids the problem of troublesome winding at the beginning of impregnation in the prior art, the fiber bundle needs to pass through multiple winding wheels and needs to be S-shapedly wound by crossing each other, the cross-shaped mounting frame 21 cross-distributes the winding structure, the pressure roller glue removal structure, and the drying box 28, so that the impregnation system with the cross layout has the advantages of small space ratio and compact connection between structures, can quickly complete the overall impregnation process of the fiber bundle, and improves the impregnation efficiency of the fiber bundle, and effectively solves the problem of large occupied area of the equipment in the impregnation system in the prior art.

[0054] Example 2

[0055] Please refer to Figure 4 As shown in the drawings, based on the above-mentioned example 1, the equipment in the impregnation system in the prior art is installed in a horizontal layout, which not only has the problem of large occupied area, but also needs to adjust the aperture of each device one by one to adapt to the fiber bundle when the thickness specifications of the fiber bundle are different, and then perform impregnation work, so that the current fiber bundle impregnation system has the problem of inconvenient adjustment when impregnating fiber bundles with different thickness specifications.

[0056] The connecting mechanism 29 is arranged on the mounting frame 21, and the connecting mechanism 29 includes a movable rod 291, a sliding plate 292, and a sliding block 293,

[0057] The mounting sleeve 23 is slidably arranged on the mounting frame 21, the first impregnation wheel is slidably arranged on the mounting frame 21 through the sliding plate 292, and the first pressure roller 26 is slidably arranged above the vertical part of the mounting frame 21 through the sliding block 293.

[0058] The movable rods 291 are provided with four, and are arranged in a rhombus mode on the mounting frame 21, the two ends of the upper movable rods 291 are connected with the mounting sleeve 23 and the sliding block 293 respectively, and the two ends of the lower movable rods 291 are connected with the mounting sleeve 23 and the sliding plate 292 respectively;

[0059] The mounting sleeve 23 is connected with the adjusting mechanism, the adjusting mechanism is installed on the cross beam 14, the adjusting mechanism comprises a double-shaft air cylinder 15, a mounting block 16 and a mounting rod 17; the two mounting blocks 16 are slidably arranged on the two sides of the cross beam 14 respectively, the mounting rod 17 is vertically arranged on the mounting block 16, the mounting rod 17 is connected with the mounting sleeve 23, and the two mounting blocks 16 are connected with the output end of the double-shaft air cylinder 15; the double-shaft air cylinder 15 is installed on the middle part of the cross beam 14;

[0060] In work, the double-shaft air cylinder 15 is controlled to work, the two mounting blocks 16 are driven to move towards each other along the cross beam 14, the two mounting sleeves 23 are moved towards each other through the mounting rod 17, the sliding plate 292 and the sliding block 293 are moved towards each other through the movable rods 291 when the two mounting sleeves 23 move towards each other, the distance between the fiber bundle penetrating groove and the fiber bundle threading groove corresponding to the two mounting sleeves 23 is increased when the distance between the two mounting sleeves 23 is increased, and the distance between the fiber bundle penetrating groove and the fiber bundle threading groove corresponding to the two mounting sleeves 23 is reduced when the distance between the two mounting sleeves 23 is reduced; the connecting mechanism 29 of the present application can control the two mounting sleeves 23 to move away from each other when the diameter of the fiber bundle is increased, so that the thicker fiber bundle can be soaked in the groove body 11 for a longer time, and the corresponding impregnation wheel set 25 and the pressure wheel assembly can also complete the corresponding adjustment work to meet the thicker fiber bundle; therefore, the impregnation system provided with the connecting mechanism 29 is convenient to adjust and is suitable for fiber bundle impregnation work of different thicknesses.

[0061] Example 3

[0062] Please refer to Figures 5-7 As shown in the figure, based on the above-mentioned example 2, the upper and lower sides of the drying box 28 are respectively provided with threading holes for fiber bundle movement, and a plurality of heating rings 281 are arranged in the drying box 28, and the heating rings 281 are connected with the telescopic mechanism 282;

[0063] The telescopic mechanism 282 comprises an air pipe 2821, a hollow plate 2822, a connecting block 2823, a movable connecting plate 2824 and a limiting rod 2825; a plurality of hollow plates 2822 are arranged at equal intervals and located at the bottom of the drying box 28, the plurality of hollow plates 2822 are sleeved on the limiting rod 2825, and the plurality of hollow plates 2822 are connected with each other through the movable connecting plate 2824;

[0064] The limiting rod 2825 is arranged at the bottom of the drying box 28, the hollow plate 2822 away from the compression roller assembly is fixed on the inner wall of the drying box 28 through a connecting rod, the hollow plate 2822 close to the compression roller assembly is provided with a connecting block 2823, the connecting block 2823 is connected with one end of a connecting shaft 294, and the other end of the connecting shaft 294 is connected with a sliding block 293 through sliding through the drying box 28;

[0065] The hollow plate 2822 is provided with an air pipe 2821 on one side, the middle part of the hollow plate 2822 is communicated with the inner cavity of the heating ring 281, the inner ring of the heating ring 281 is provided with an air hole, and when heating, the heat source enters the inner cavity of the hollow plate 2822 from the air pipe 2821 and then is discharged from the air hole, so that the fiber bundle after impregnation is heated and solidified;

[0066] When the sliding block 293 moves, the connecting block 2823 is driven to move through the connecting shaft 294, and then the movable connecting plate 2824 is used to make the plurality of hollow plates 2822 equidistantly dispersed, so that the heating ring 281 moves along, so that the length of the drying path is changed, and then the drying time of the fiber bundle is changed.

[0067] Embodiment 4

[0068] Based on the above-mentioned embodiment 3, the present application is a kind of production FRP tendon fiber bundle impregnation system's impregnation method, including the following steps:

[0069] Step 1: according to the diameter specification of fiber bundle, by controlling the work of double shaft air cylinder 15, two mounting blocks 16 are driven to move towards along crossbeam 14, two mounting sleeves 23 are moved towards by mounting rod 17, two mounting sleeves 23 are moved towards, sliding plate 292 and sliding block 293 are moved towards by movable rod 291, so that the interval of first impregnation wheel and second impregnation wheel is adjusted, and the interval of first compression roller 26 and second compression roller 27 is adjusted;

[0070] When the sliding block 293 moves, the connecting block 2823 is driven to move through the connecting shaft 294, and then the movable connecting plate 2824 is used to make the plurality of hollow plates 2822 equidistantly dispersed, so that the heating ring 281 moves along, so that the length of the drying path is changed, and then the drying time of the fiber bundle is changed.

[0071] Step 2: After the FRP fiber bundle is wound along the line wheel 24 on one side, the impregnation wheel group 25 on the bottom, and the line wheel 24 on the other side, the impregnation wheel group 25 applies pressure to the fiber bundle during the impregnation process, so that the fiber bundle is more thoroughly impregnated, enters the fiber bundle threading groove, is extruded by the first pressure wheel 26 and the second pressure wheel 27 to remove excess glue on the surface of the fiber bundle, and then enters the drying box 28 to complete the curing work.

[0072] The working principle of the present application is as follows: the impregnation system of the present application forms a U-shaped winding structure through the line wheel 24 on the two side mounting plates 22 and the guide wheel on the bottom, which facilitates winding work and avoids the problem of troublesome winding at the beginning of impregnation in the prior art, in which the fiber bundle needs to pass through multiple winding wheels and needs to be S-shapedly wound by crossing each other; and the cross-shaped mounting frame 21 cross-distributes the winding structure, the pressure wheel glue removal structure, and the drying box 28, so that the cross-laid impregnation system has the advantages of small space ratio and compact connection between structures, can quickly complete the overall impregnation process of the fiber bundle, and improves the impregnation efficiency of the fiber bundle; effectively solves the problem of large floor area caused by the installation of the equipment in the impregnation system in the prior art in a horizontal layout mode.

[0073] The connecting mechanism 29 of the present application can control the distance increasing movement of the two mounting sleeves 23 when the diameter of the fiber bundle increases, so that the soaking time of the thicker fiber bundle in the groove body 11 can be longer, and the corresponding impregnation wheel group 25 and pressure wheel assembly can also complete the corresponding adjustment work to meet the thicker fiber bundle; therefore, the impregnation system provided with the connecting mechanism 29 has the advantages of convenient adjustment and is suitable for impregnation work of fiber bundles with different thicknesses.

[0074] When the sliding block 293 moves, the connecting block 2823 is driven to move through the connecting shaft 294, the multiple hollow plates 2822 are equidistantly dispersed through the movable connecting plate 2824, the heating ring 281 follows the movement, the length of the drying path is changed, and the fiber bundle drying time is changed; therefore, when the impregnated fiber bundle passes through the drying box 28, the drying path of the connecting mechanism 29 is increased or decreased, so that the drying box 28 can change the curing time of the fiber bundle according to the thickness specification of the fiber bundle, the soaking time of the fiber bundle is changed when the thickness specification of the fiber bundle changes, and the drying and curing time is also changed accordingly.

[0075] The above describes one embodiment of the present application in detail, but the content described is only a preferred embodiment of the present application and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A production system for FRP tendon fiber bundle impregnation, characterized by, The application relates to a dipping tank body (1) comprising a tank body (11) provided with glue solution for soaking fiber bundles, and a lifting mechanism for controlling the movement of a winding mechanism (2); the winding mechanism (2) comprises a mounting frame (21) in a cross-shaped structure, horizontal parts of the mounting frame (21) are respectively connected with mounting sleeves (23), the mounting sleeves (23) are connected with wire wheels (24) through mounting plates (22), vertical parts of the mounting frame (21) are respectively connected with a dipping wheel set (25) and a pressing wheel assembly, and a drying box (28) is arranged on the same side of the pressing wheel assembly; the mounting frame (21) is provided with a connecting mechanism (29) comprising the mounting sleeves (23), the first dipping wheel of the dipping wheel set (25) is slidably arranged on the mounting frame (21) through a sliding plate (292), and the first pressing wheel (26) of the pressing wheel assembly is slidably arranged above the vertical part of the mounting frame (21) through a sliding block (293); wherein four movable rods (291) are arranged, two ends of the movable rod (291) arranged on the upper side are respectively connected with the mounting sleeves (23) and the sliding block (293), and two ends of the movable rod (291) arranged on the lower side are respectively connected with the mounting sleeves (23) and the sliding plate (292); the two mounting sleeves (23) are moved towards each other, the sliding plate (292) and the sliding block (293) are moved towards each other through the movable rods (291) when the two mounting sleeves (23) are moved towards each other, so that the interval between the first dipping wheel and the second dipping wheel and the interval between the first pressing wheel (26) and the second pressing wheel (27) are adjusted; the dipping wheel set (25) comprises the first dipping wheel and the second dipping wheel; the pressing wheel assembly comprises the first pressing wheel (26) and the second pressing wheel (27). The lifting mechanism is driven by a gas cylinder. The first dipping wheel and the second dipping wheel are arranged on the mounting frame (21), the first dipping wheel is arranged above the second dipping wheel, and a fiber bundle penetrating groove is arranged between the first dipping wheel and the second dipping wheel. The upper side of the vertical part of the mounting frame (21) is provided with a fiber bundle threading groove, the pressing wheel assembly is arranged in the fiber bundle threading groove, the second pressing wheel (27) is arranged above the first pressing wheel (26), and the first pressing wheel (26) and the second pressing wheel (27) are arranged in the fiber bundle threading groove in a spaced mode. The mounting sleeves (23) are connected with an adjusting mechanism, the adjusting mechanism is arranged on a cross beam (14), and the adjusting mechanism comprises two mounting blocks (16) moving towards each other, mounting rods (17) are vertically arranged on the mounting blocks (16), and the mounting rods (17) are connected with the mounting sleeves (23). The drying box (28) is provided with a plurality of heating rings (281), the heating rings (281) are connected with a telescopic mechanism (282), and the telescopic mechanism (282) is used for changing the length of a heating path of the heating rings (281). The telescopic mechanism (282) comprises ​ ​ ​ 2. A system for impregnating a fiber bundle of FRP rods according to claim 1, characterized in that, ​ 3. A system for the production of FRP tendon fiber bundles according to claim 2, characterized in that, ​ 4. The system according to claim 3, wherein the system is characterized by: ​ 5. The system according to claim 4, wherein the system is characterized by: ​ ​ 6. A system for the production of FRP tendon fiber bundles according to claim 5, characterized in that, ​ 7. The system according to claim 6, wherein the system is characterized by: ​ A plurality of hollow plates (2822) are arranged equidistantly and located at the bottom of the drying box (28), the plurality of hollow plates (2822) are sleeved on the limiting rod (2825), and the plurality of hollow plates (2822) are connected with each other through the movable connecting plate (2824).

8. The system according to claim 7, wherein the system is characterized by: The hollow plates (2822) away from the compression roller assembly are fixed on the inner wall of the drying box (28) through connecting rods, and the hollow plates (2822) close to the compression roller assembly are provided with connecting blocks (2823). The connecting block (2823) is connected with one end of the connecting shaft (294), and the other end of the connecting shaft (294) slides through the drying box (28) and is connected with the sliding block (293).

9. A method of impregnating the system for producing a FRP tendon fiber bundle according to claim 8, characterized by, The method comprises the following steps: Step 1: according to the diameter specification of the fiber bundle, by controlling the work of the double-shaft air cylinder (15), the two mounting blocks (16) are driven to move towards each other along the cross beam (14), the two mounting sleeves (23) are moved towards each other through the mounting rod (17), when the two mounting sleeves (23) move towards each other, the sliding plate (292) and the sliding block (293) are driven to move towards each other through the movable rod (291), so as to adjust the distance between the first and second impregnation rollers and the distance between the first and second compression rollers (26, 27); When the sliding block (293) moves, the connecting block (2823) is driven to move through the connecting shaft (294), and then a plurality of hollow plates (2822) are dispersed equidistantly through the movable connecting plate (2824), so that the heating ring (281) moves to change the length of the drying path; Step 2: after the FRP fiber bundle is wound along the line roller (24) on one side, the impregnation roller set (25) at the bottom and the line roller (24) on the other side, the impregnation roller set (25) applies pressure to the fiber bundle during impregnation, so that the fiber bundle is impregnated more thoroughly, enters the fiber bundle threading groove, is extruded by the first and second compression rollers (26, 27) to remove excess glue on the surface of the fiber bundle, and then enters the drying box (28) to complete the curing work.

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