A yarn tension control system for a rapier loom

Abstract

The application discloses a yarn tension control system of a rapier loom and belongs to the technical field of yarn tension control, which comprises a rapier loom body, a lifting plate, a mounting cover, a yarn limiting assembly and a tension roller cleaning and dust collection assembly. An electrical control box is fixedly installed at one end of the rapier loom body, the lifting plate is slidingly installed in the square groove, an electric guide rail is fixedly installed at one end of the lifting plate, a mounting plate is fixedly connected to the sliding seat of the electric guide rail, a U-shaped plate is fixedly installed at one end of the mounting plate, a tension adjusting roller is rotatably installed on the inner side of the U-shaped plate, the tension roller cleaning and dust collection assembly is arranged, nylon brushes are used to scrape off the fluff and dust attached to the surface of the tension adjusting roller, a negative pressure suction channel is formed by cooperating with a dust collection pipe, an arc-shaped cleaning plate inner cavity and a small industrial dust collector, the flying fluff is collected and cleaned, the secondary dust raising of the dust can be avoided, the re-adsorption of the flying fluff to weft yarn is reduced, the wear of the weft yarn is reduced, and the weaving defects caused by the electrostatic adsorption are reduced.

Description

Technical Field

[0001] This invention specifically relates to a yarn tension control system for a rapier loom, belonging to the field of yarn tension control technology. Background Technology

[0002] During the weaving process on a rapier loom, the weft yarn continuously rubs against the surface of the tension regulating roller. Yarn fibers and dust easily accumulate on the roller's surface. This accumulation of debris alters the coefficient of friction, causing continuous weft tension drift and resulting in defects such as weft shrinkage, weft breakage, and weft streaks.

[0003] For example, announcement number CN106868686B discloses a rapier loom for weaving double-layer breathable fabric, comprising a frame, warp feed component, warp stop component, warp insertion component, weft insertion component, jacquard component, reset component, crimping component, and drive component. The warp insertion component includes a first warp insertion component with multiple independently moving parts arranged in an array and a second warp insertion component with multiple independently moving parts arranged in an array. This invention utilizes a rapier loom to weave jacquard, perforated double-layer breathable fabric onto a woven fabric base. The fabric exhibits good shaping, is strong and durable, provides a comfortable feel without feeling stuffy, optimizes the entire weaving process, increases production efficiency, reduces costs, enhances product market value, and improves enterprise economic benefits.

[0004] Existing technologies generally rely on operators to manually wipe the tension rollers at regular intervals, which is inefficient. Blowing with compressed air can easily create secondary dust, and the floating dust is re-adsorbed onto the weft yarn and yarn guide components, making it impossible to fundamentally collect pollutants. At the same time, the outward-spraying airflow can disturb the high-speed traveling weft yarn, affecting the stability of the weft insertion and connection of the rapier. Moreover, conventional tension regulating rollers lack an adjustable yarn limiting structure, which can easily cause lateral deviation of the weft yarn during operation, resulting in the yarn deviating from the effective working surface of the tension regulating roller. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a yarn tension control system for rapier looms, thereby improving the cleaning effect of the tension regulating roller.

[0006] The present invention achieves the above objectives through the following technical solution: a yarn tension control system for a rapier loom, comprising a rapier loom body, a lifting plate, a mounting cover, a yarn limiting assembly, and a tension roller cleaning and dust extraction assembly; The rapier shuttle loom body has square slots at both ends on one side, and an electrical control box is fixedly installed at one end of the rapier shuttle loom body. The electrical control box integrates a PLC control module and an operation display panel. The lifting plate is slidably installed in the square groove. An electric guide rail is fixedly installed at one end of the lifting plate. An installation plate is fixedly connected to the sliding seat of the electric guide rail. A U-shaped plate is fixedly installed at one end of the installation plate. A tension adjusting roller is rotatably installed on the inner side of the U-shaped plate. A sliding groove is opened at one end of the U-shaped plate. The mounting cover is slidably installed in the sliding groove. A limiting block is hinged inside the mounting cover. An arc hole is opened at one end of the limiting block. A U-shaped plate is fixedly installed at one end of the mounting cover. The yarn limiting assembly includes an arc-shaped tube and an arc-shaped rod; One end of the arc-shaped tube is fixedly installed on the inner side wall of the mounting cover, and an arc-shaped spring is fixedly installed inside the other end of the arc-shaped tube. One end of the arc-shaped rod is fixedly connected to the limiting block, the other end of the arc-shaped rod is slidably installed inside the arc-shaped tube, and one end of the arc-shaped spring is fixedly connected to the arc-shaped rod; The tension roller cleaning and dust collection assembly includes an arc-shaped cleaning plate and a small industrial-grade vacuum cleaner; One end of the arc-shaped cleaning plate is slidably installed inside the U-shaped plate. A nylon brush is detachably installed on one end of the inner side of the arc-shaped cleaning plate via a positioning screw. A vacuum tube is installed in a circumferential array on the other end of the inner side of the arc-shaped cleaning plate. A cavity is opened inside the arc-shaped cleaning plate, and the vacuum tube communicates with the cavity. The small industrial-grade vacuum cleaner is fixedly installed on one side of the rapier loom body. A dust conveying pipe is fixedly installed at the input end of the small industrial-grade vacuum cleaner. One end of the dust conveying pipe is a corrugated telescopic hose, and the corrugated telescopic hose is connected to the cavity.

[0007] Furthermore, in order to enable the lifting plate to move, a first trapezoidal lead screw is rotatably installed in the square groove. One end of the nut of the first trapezoidal lead screw is fixedly connected to the lifting seat. The lead screw shaft of the first trapezoidal lead screw is threadedly engaged with the nut to drive the lifting seat to reciprocate. The lifting seat is fixedly connected to the lifting plate. A first motor is fixedly installed at one end of the square groove. The output end of the first motor is fixedly connected to the first trapezoidal lead screw. The first motor is electrically connected to the PLC control module.

[0008] Furthermore, in order to enable the mounting cover to move, a second trapezoidal lead screw is rotatably installed in the sliding groove. The nut of the second trapezoidal lead screw is fixedly connected to one end of the mounting cover, and the lead screw shaft of the second trapezoidal lead screw is threadedly engaged with the nut to drive the mounting cover to reciprocate.

[0009] Furthermore, in order to enable the second trapezoidal lead screw to rotate, a second motor is fixedly installed at one end of the U-shaped plate, the output end of the second motor is fixedly connected to the second trapezoidal lead screw, and the second motor is electrically connected to the PLC control module.

[0010] Furthermore, in order to enable the arc-shaped cleaning plate to move up and down, an electric cylinder is fixedly installed at the upper end of the arc-shaped plate. The driving end of the electric cylinder is fixedly connected to the arc-shaped cleaning plate, and the electric cylinder is electrically connected to the PLC control module.

[0011] Furthermore, in order to control the small industrial-grade vacuum cleaner, the small industrial-grade vacuum cleaner is electrically connected to the PLC control module.

[0012] The technical effects and advantages of this invention are as follows: 1. This invention, by setting up a tension roller cleaning and dust collection component, uses a nylon brush to scrape off the lint and dust adhering to the surface of the tension adjusting roller. Combined with the dust collection pipe, the internal cavity of the arc-shaped cleaning plate, and a small industrial-grade vacuum cleaner, a negative pressure suction channel is formed, which can collect and clean the fallen lint in real time. This eliminates the need for traditional compressed air blowing, avoids secondary dust generation, reduces the re-adsorption of lint onto the weft yarn, and reduces weaving defects caused by weft yarn wear and electrostatic adsorption. At the same time, there is no outward airflow to interfere with the weft yarn, ensuring stable weft insertion movement. 2. By setting up a lifting plate in conjunction with a square groove, and relying on the first trapezoidal screw and the first motor to drive the lifting plate to lift as a whole, the height position of the tension adjusting roller can be adjusted; the electric guide rail can drive the mounting plate to move laterally, thereby adjusting the lateral position of the tension roller, realizing multi-directional position adjustment of the tension adjusting roller, adapting to various weft yarn materials, and improving the versatility of the equipment; 3. The yarn limiting component uses an arc-shaped tube, an arc-shaped spring, and an arc-shaped rod in combination. With the help of the spring force, the limiting block is pushed to fit the yarn, which can adaptively guide and limit the weft yarn, stabilize the weft yarn travel path, reduce weft yarn vibration, and help maintain tension stability. The arc-shaped spring has a certain buffering capacity, reducing the damage to the yarn caused by the impact of high-speed weft insertion. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lifting plate connection structure of the present invention; Figure 3 This is a schematic diagram of the mounting plate connection structure of the present invention; Figure 4 This is a schematic diagram of the mounting cover connection structure of the present invention; Figure 5 This is a schematic diagram of the limiting block structure of the present invention; Figure 6 This is a schematic diagram of the yarn limiting component structure of the present invention; Figure 7 This is a schematic diagram of the tension roller cleaning and dust collection assembly of the present invention; Figure 8 This is a schematic diagram of the arc-shaped cleaning plate structure of the present invention.

[0014] In the diagram: 1. Rapier loom body; 2. Lifting plate; 3. Mounting cover; 4. Yarn limiting assembly; 401. Arc-shaped tube; 402. Arc-shaped rod; 403. Arc-shaped spring; 5. Tension roller cleaning and dust collection assembly; 501. Arc-shaped cleaning plate; 502. Small industrial-grade vacuum cleaner; 503. Nylon brush; 504. Dust collection pipe; 505. Dust conveying pipe; 6. Electrical control box; 7. Mounting plate; 8. U-shaped plate; 9. Tension adjusting roller; 10. Limiting block; 11. Recurve plate; 12. First trapezoidal lead screw; 13. First motor; 14. Second trapezoidal lead screw; 15. Second motor; 16. Electric cylinder. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-8 As shown, a yarn tension control system for a rapier loom includes a rapier loom body 1, a lifting plate 2, a mounting cover 3, a yarn limiting assembly 4, and a tension roller cleaning and dust extraction assembly 5. The rapier loom body 1 has square slots at both ends on one side. An electrical control box 6 is fixedly installed at one end of the rapier loom body 1. The electrical control box 6 integrates a PLC control module and an operation display panel. A first trapezoidal lead screw 12 is rotatably installed in the square slot. One end of the nut of the first trapezoidal lead screw 12 is fixedly connected to the lifting seat. The lead screw shaft of the first trapezoidal lead screw 12 is threadedly engaged with the nut to drive the lifting seat to reciprocate. The lifting seat is fixedly connected to the lifting plate 2. A first motor 13 is fixedly installed at one end of the square slot. The output end of the first motor 13 is fixedly connected to the first trapezoidal lead screw 12. The first motor 13 is electrically connected to the PLC control module. In use, the entire system takes the electrical control box 6 as the control core and the PLC control module integrated in the box as the control center. The matching operation display panel realizes parameter setting and status monitoring. The first motor 13, the second motor 15, the electric guide rail, the electric cylinder 16, and the small industrial vacuum cleaner 502 are all electrically connected to the PLC control module to form a complete closed-loop electrical control system. Operators can preset process parameters such as the target height, lateral position, cleaning cycle, and brush bonding pressure of the tension adjustment roller 9 through the operation display panel. The PLC control module outputs corresponding control signals to each actuator according to the set parameters, realizing the full-process automated linkage of multi-dimensional position adjustment, yarn limit, and automatic cleaning and dust collection.

[0017] The lifting plate 2 is slidably installed in the square groove. An electric guide rail is fixedly installed at one end of the lifting plate 2. An installation plate 7 is fixedly connected to the sliding seat of the electric guide rail. A U-shaped plate 8 is fixedly installed at one end of the installation plate 7. A tension adjusting roller 9 is rotatably installed on the inner side of the U-shaped plate 8. A sliding groove is opened at one end of the U-shaped plate 8. Mounting cover 3 is slidably installed in the sliding groove. A limit block 10 is hinged inside mounting cover 3, with an arc-shaped hole at one end. A U-shaped plate 11 is fixedly mounted at one end of mounting cover 3. A second trapezoidal lead screw 14 is rotatably installed in the sliding groove. The nut of the second trapezoidal lead screw 14 is fixedly connected to one end of mounting cover 3. The lead screw shaft of the second trapezoidal lead screw 14 is threadedly engaged with the nut to drive the mounting cover 3 to reciprocate. A second motor 15 is fixedly mounted at one end of U-shaped plate 8. The output end of the second motor 15 is fixedly connected to the second trapezoidal lead screw 14. The second motor 15 is electrically connected to the PLC control module. like Figure 6 As shown, the yarn limiting assembly 4 includes an arc-shaped tube 401 and an arc-shaped rod 402; One end of the arc-shaped tube 401 is fixedly installed on the inner side wall of the mounting cover 3, and an arc-shaped spring 403 is fixedly installed inside the arc-shaped tube 401. One end of the arc-shaped rod 402 is fixedly connected to the limiting block 10, and the other end of the arc-shaped rod 402 is slidably installed inside the arc-shaped tube 401, and one end of the arc-shaped spring 403 is fixedly connected to the arc-shaped rod 402. like Figure 7As shown, the tension roller cleaning and dust collection assembly 5 includes an arc-shaped cleaning plate 501 and a small industrial-grade vacuum cleaner 502; One end of the arc-shaped cleaning plate 501 is slidably installed inside the U-shaped plate 11. A nylon brush 503 is detachably installed on one end of the inner side of the arc-shaped cleaning plate 501 through a positioning screw. A suction pipe 504 is installed in a circular array on the other end of the inner side of the arc-shaped cleaning plate 501. A cavity is opened inside the arc-shaped cleaning plate 501, and the suction pipe 504 is connected to the cavity. An electric cylinder 16 is fixedly installed on the upper end of the U-shaped plate 11. The drive end of the electric cylinder 16 is fixedly connected to the arc-shaped cleaning plate 501. The electric cylinder 16 is electrically connected to the PLC control module. A small industrial vacuum cleaner 502 is electrically connected to the PLC control module. A small industrial vacuum cleaner 502 is fixedly installed on one side of the rapier loom body 1. A dust conveying pipe 505 is fixedly installed at the input end of the small industrial vacuum cleaner 502. One end of the dust conveying pipe 505 is a corrugated telescopic hose, and the corrugated telescopic hose is connected to the cavity.

[0018] Working principle: During use, the system can adjust the spatial position of the tension adjusting roller 9 in multiple dimensions according to the weft yarn material, yarn linear density, weaving speed and target tension requirements, thereby changing the weft yarn wrap angle and thread path to match different process requirements. First, the lifting drive mechanism is composed of the first motor 13 and the first trapezoidal screw 12. When the PLC control module outputs the height adjustment command, the first motor 13 receives the signal and starts, and outputs torque to drive the screw shaft of the first trapezoidal screw 12 to rotate on a fixed axis in the square groove. Through the threaded meshing transmission between the screw and the nut, the lifting seat at the end of the nut moves up and down along the guide direction of the square groove. Since the lifting seat is fixedly connected to the lifting plate 2, the lifting plate 2 rises and falls synchronously. Finally, the electric guide rail, mounting plate 7, U-shaped plate 8 and tension adjusting roller 9 installed on the lifting plate 2 are all calibrated to match the weft yarn thread path of different layer heights. The electric guide rail fixed to the surface of the lifting plate 2 serves as a transverse drive unit, with its sliding seat fixedly connected to the mounting plate 7. When it is necessary to adjust the weft yarn wrap angle or transverse position, the electric guide rail receives a control command and drives the sliding seat to move laterally along the guide rail, causing the mounting plate 7 and U-shaped plate 8 to move laterally synchronously. This adjusts the position of the tension adjusting roller 9 in a direction perpendicular to the yarn travel, thereby changing the contact wrap angle between the yarn and the roller body and achieving coarse adjustment of the tension reference to adapt to weaving scenarios with different tension requirements. Then, the second motor 15 and the second trapezoidal screw 14 form an axial drive mechanism to drive the mounting cover 3 and auxiliary components to move axially along the tension adjusting roller 9. During adjustment, the second motor 15 starts and drives the screw shaft of the second trapezoidal screw 14 to rotate in the sliding groove of the U-shaped plate 8. Through threaded transmission, the nut and the mounting cover 3 fixed to it slide axially along the sliding groove, so that the yarn limiting component 4 and the tension roller cleaning and dust collection component 5 are precisely aligned with the actual yarn travel area, ensuring that the limiting and cleaning effects are accurately applied to the yarn contact section and avoiding ineffective work.

[0019] The yarn passes over the surface of the tension regulating roller 9, then through the arc-shaped hole at the end of the limiting block 10, and is finally fed to the rapier weft insertion mechanism. The yarn limiting component 4 uses an elastic adaptive structure to dynamically limit and buffer the weft yarn, helping to maintain tension stability. Its working process is as follows: The arc-shaped tube 401 is fixed to the inner wall of the mounting cover 3. An arc-shaped spring 403 is coaxially arranged inside. One end of the arc-shaped rod 402 is slidably inserted into the inside of the arc-shaped tube 401, and the other end is fixedly connected to the side wall of the limiting block 10. The arc-shaped spring 403 is always in a compressed state, continuously applying an elastic thrust along the axis of the arc-shaped tube 401 to the arc-shaped rod 402, pushing the arc-shaped rod 402 outward, thereby causing the inner wall of the arc-shaped hole of the limiting block 10 hinged inside the mounting cover 3 to elastically abut against the weft yarn surface. When the yarn experiences sudden speed changes, tension fluctuations, or lateral vibrations, the reaction force exerted by the yarn on the limiting block 10 will compress the arc spring 403 through the arc rod 402. The elastic deformation of the spring will absorb the impact energy and offset the instantaneous tension peak. When the tension drops, the arc spring 403 will rebound synchronously, pushing the limiting block 10 to always fit the yarn, continuously limiting the lateral deviation of the yarn, stabilizing the yarn path, avoiding tension disturbances caused by yarn vibrations and deviations, and reducing the scratch damage to the yarn surface caused by rigid limiting.

[0020] The tension roller cleaning and dust collection assembly 5 adopts a combination of mechanical brush cleaning and synchronous negative pressure dust collection, which can complete the online cleaning of the tension regulating roller 9 surface during the loom operation without the need for manual wiping after stopping the machine. Its complete working process is as follows: After the operator triggers the cleaning command via the operation display panel, the PLC control module starts the cleaning process: First, the electric cylinder 16, fixed to the upper end of the U-shaped plate 11, extends upon receiving the command. Its drive end pushes the arc-shaped cleaning plate 501 along the guide groove of the U-shaped plate 11 towards the tension adjusting roller 9 until the nylon brush 503 on the inner side of the arc-shaped cleaning plate 501 adheres to the roller surface of the tension adjusting roller 9 with a set pressure. The U-shaped plate 11 provides a moving guide for the arc-shaped cleaning plate 501, ensuring that the brush adheres smoothly to the roller surface radially. The adhesion pressure can be precisely controlled by the extension amount of the electric cylinder 16. The tension adjusting roller 9 is passively rotated by the friction of the weft yarn, and the roller surface continuously sweeps across the nylon brush 503. The bristles of the nylon brush 503 continuously scrape away the accumulated yarn fuzz, dust particles, and oil deposits on the roller surface, peeling the firmly attached dirt off the roller surface. At the same time, the small industrial vacuum cleaner 502 starts up simultaneously, and a stable negative pressure environment is formed in the internal cavity of the arc-shaped cleaning plate 501 through the dust conveying pipe 505. Multiple sets of suction pipes 504 arranged in a circumferential array on the inner side of the arc-shaped cleaning plate 501 are connected to the cavity, forming a uniform negative pressure suction field in the brush cleaning area. The flying flowers and dust swept off by the brush are sucked into the suction pipes 504 with the airflow, and after entering the internal cavity, they enter the dust collection chamber of the small industrial vacuum cleaner 502 in sequence through the corrugated telescopic hose and the dust conveying pipe 505 for centralized collection. Among them, the corrugated telescopic hose at the end of the dust conveying pipe 505 can adaptively expand and contract with the movement of the arc-shaped cleaning plate 501, always keeping the pipeline sealed and connected to avoid negative pressure leakage; after the cleaning operation is completed, the electric cylinder 16 drives the arc-shaped cleaning plate 501 to move in the opposite direction and reset, and the nylon brush 503 disengages from the surface of the tension adjusting roller 9 to avoid long-term contact that would increase the rotational resistance of the roller and interfere with normal tension control. Then the small industrial vacuum cleaner 502 stops and waits for the next cleaning instruction.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A yarn tension control system for a rapier loom, characterized in that: It includes the rapier loom body (1), lifting plate (2), mounting cover (3), yarn limiting assembly (4) and tension roller cleaning and dust collection assembly (5); The rapier shuttle loom body (1) has square slots at both ends on one side. An electrical control box (6) is fixedly installed at one end of the rapier shuttle loom body (1). The electrical control box (6) integrates a PLC control module and an operation display panel. The lifting plate (2) is slidably installed in the square groove. An electric guide rail is fixedly installed at one end of the lifting plate (2). An installation plate (7) is fixedly connected to the sliding seat of the electric guide rail. A U-shaped plate (8) is fixedly installed at one end of the installation plate (7). A tension adjusting roller (9) is rotatably installed on the inner side of the U-shaped plate (8). A sliding groove is opened at one end of the U-shaped plate (8). The mounting cover (3) is slidably installed in the sliding groove. A limiting block (10) is hinged inside the mounting cover (3). An arc-shaped hole is opened at one end of the limiting block (10). A spiral plate (11) is fixedly installed at one end of the mounting cover (3). The yarn limiting component (4) includes an arc-shaped tube (401) and an arc-shaped rod (402). One end of the arc-shaped tube (401) is fixedly installed on the inner side wall of the mounting cover (3), and an arc-shaped spring (403) is fixedly installed inside the arc-shaped tube (401). One end of the arc-shaped rod (402) is fixedly connected to the limiting block (10), and the other end of the arc-shaped rod (402) is slidably installed inside the arc-shaped tube (401), and one end of the arc-shaped spring (403) is fixedly connected to the arc-shaped rod (402); The tension roller cleaning and dust collection assembly (5) includes an arc-shaped cleaning plate (501) and a small industrial-grade vacuum cleaner (502). One end of the arc-shaped cleaning plate (501) is slidably installed inside the U-shaped plate (11). A nylon brush (503) is detachably installed on one end of the inner side of the arc-shaped cleaning plate (501) by a positioning screw. A vacuum tube (504) is installed in a circular array on the other end of the inner side of the arc-shaped cleaning plate (501). A cavity is opened inside the arc-shaped cleaning plate (501), and the vacuum tube (504) is connected to the cavity. The small industrial vacuum cleaner (502) is fixedly installed on one side of the rapier loom body (1). A dust conveying pipe (505) is fixedly installed at the input end of the small industrial vacuum cleaner (502). One end of the dust conveying pipe (505) is a corrugated telescopic hose, and the corrugated telescopic hose is connected to the cavity.

2. The yarn tension control system for a rapier loom as described in claim 1, characterized in that: A first trapezoidal lead screw (12) is rotatably installed in the square groove. One end of the nut of the first trapezoidal lead screw (12) is fixedly connected to the lifting seat. The lead screw shaft of the first trapezoidal lead screw (12) is threadedly engaged with the nut to drive the lifting seat to move back and forth. The lifting seat is fixedly connected to the lifting plate (2).

3. The yarn tension control system for a rapier loom as described in claim 2, characterized in that: A first motor (13) is fixedly installed at one end of the square slot. The output end of the first motor (13) is fixedly connected to the first trapezoidal lead screw (12). The first motor (13) is electrically connected to the PLC control module.

4. The yarn tension control system for a rapier loom as described in claim 1, characterized in that: A second trapezoidal lead screw (14) is rotatably installed in the sliding groove. The nut of the second trapezoidal lead screw (14) is fixedly connected to one end of the mounting cover (3). The lead screw shaft of the second trapezoidal lead screw (14) is threadedly engaged with the nut to drive the mounting cover (3) to reciprocate.

5. The yarn tension control system for a rapier loom as described in claim 4, characterized in that: A second motor (15) is fixedly installed at one end of the U-shaped plate (8). The output end of the second motor (15) is fixedly connected to the second trapezoidal lead screw (14). The second motor (15) is electrically connected to the PLC control module.

6. The yarn tension control system for a rapier loom as described in claim 1, characterized in that: An electric cylinder (16) is fixedly installed on the upper end of the spiral plate (11), and the driving end of the electric cylinder (16) is fixedly connected to the arc-shaped cleaning plate (501).

7. The yarn tension control system for a rapier loom as described in claim 6, characterized in that: The electric cylinder (16) is electrically connected to the PLC control module.

8. The yarn tension control system for a rapier loom as described in claim 1, characterized in that: The small industrial-grade vacuum cleaner (502) is electrically connected to the PLC control module.

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