High-strength prestressed steel strand twisting mechanism and twisting method thereof

Abstract

The application provides a high-strength prestressed steel strand twisting mechanism and a twisting method thereof, a workbench upper surface is vertically fixed with a workbench, a pay-off rack, a main support frame, a guide rack and a conveying frame from left to right, a servo motor is fixed at the bottom of the main support frame, a first wire feeding disc is rotationally connected in the main support frame, a second wire feeding disc is fixed at the right side of the first wire feeding disc through a connecting rod, a conveying motor is fixed at the bottom of the conveying frame, a conveying roller is rotationally connected at the upper part of the conveying frame, wire conveying assemblies are arranged in the first wire feeding disc and the second wire feeding disc, a lubricating assembly is arranged above the guide rack, the wire conveying direction of the steel strand can be adjusted when the steel strand is clamped and conveyed, the stability is higher, the wire conveying is smoother, the surface of the twisted steel strand can be uniformly lubricated, and the service life of the twisted steel strand is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel strand processing equipment, in particular to a high-strength prestressed steel strand twisting mechanism and a twisting method thereof. BACKGROUND

[0002] Prestressed steel strand is a twisted steel cable composed of multiple high-strength steel wires and is suitable for prestressed concrete and similar purposes after stress relief treatment (stabilization treatment). The main features of prestressed steel strand are high strength and good relaxation performance, and it is relatively straight when expanded. Common tensile strength grades are 1860 MPa, and there are also 1720, 1770, 1960, 2000, 2100 MPa and other strength grades. The yield strength of such steel is also very high. In the twisting process of prestressed steel strand, the traditional twisting mechanism needs to be adjusted and adapted by different twisting mechanisms when twisting different steel wires, which is not convenient for twisting different prestressed steel strands according to different needs, and affects the subsequent processing of steel strand.

[0003] Therefore, a high-strength prestressed steel strand twisting mechanism and a twisting method thereof are provided in the prior art with patent number CN202310240754.3. The annular guide rail is driven to rotate in the annular guide rail groove by the driving mechanism. The number of annular guide rails and adjustable wire guide mechanisms is adjusted according to the twisting requirements. Different prestressed steel strands are twisted according to different requirements. The center line and the outer layer wire are positioned and tensioned by the tensioning assembly during twisting. The position of the pressing block is adjusted by the adjusting mechanism, and then the twisted steel strand is pressed to obtain a prestressed steel strand that meets the twisting requirements. The two wire feeding wheels are driven to move towards each other by the bidirectional moving mechanism, and are in contact with the prestressed steel strand after pressing. The steel strand is pressed and conveyed by the two wire feeding wheels, which facilitates the subsequent processing of the steel strand.

[0004] However, during the pressing and conveying process of the steel strand, the annular guide rail is driven to rotate in the annular guide rail groove by the driving mechanism, and the outer layer wire and the center line are twisted. At this time, the clamped steel strand slides between the first roller and the second roller, and the friction between the first roller and the second roller is large, which causes the wire to be jammed and the steel strand to be pulled and damaged by a large rotating tension, further reducing the quality of the twisted steel strand. SUMMARY

[0005] To solve the above technical problems, the present application provides a high-strength prestressed steel strand twisting mechanism and a twisting method thereof to solve the problems described in the background art.

[0006] The application discloses a high-strength prestressed steel strand twisting mechanism and a twisting method thereof, and achieves the following technical means: a high-strength prestressed steel strand twisting mechanism, which comprises a workbench, a pay-off rack, a main support frame, a servo motor, a first wire feeding disc, a second wire feeding disc, a guide frame, a conveying frame, a conveying motor and a conveying roller, and the upper surface of the workbench is vertically fixed with the workbench, the pay-off rack, the main support frame, the guide frame and the conveying frame from left to right, the bottom of the main support frame is fixed with the servo motor, the inside of the main support frame is rotationally connected with the first wire feeding disc, the right side of the first wire feeding disc is fixed with the second wire feeding disc through a connecting rod, the bottom of the conveying frame is fixed with the conveying motor, the inside of the conveying frame is rotationally connected with the conveying roller in the upper surface in the longitudinal direction, the inside of the first wire feeding disc and the second wire feeding disc is provided with a wire feeding assembly, and the upper surface of the guide frame is provided with a lubricating assembly.

[0007] As a further scheme of the application: the wire feeding assembly is composed of a mounting disc, a connecting block, an outer support frame, an upper wire feeding roller, a limiting column, a return spring, a limiting cylinder and a lower wire feeding roller;

[0008] Specifically, the inside of the first wire feeding disc and the second wire feeding disc is fixed with the mounting disc, the inside of the mounting disc is embedded with the connecting block, the upper surface of the connecting block is vertically fixed with the outer support frame, the upper surface of the outer support frame is rotationally connected with the upper wire feeding roller in the longitudinal direction, the front end and the rear end of the outer support frame are vertically fixed with the limiting column, the outer side of the limiting column is embedded with the return spring, the top of the two limiting columns is embedded with the limiting cylinder, and the lower wire feeding roller is rotationally connected between the two limiting cylinders in the longitudinal direction.

[0009] As a further scheme of the application: the inside of the first wire feeding disc and the second wire feeding disc is provided with wire feeding ports arranged in a circular ring shape and consistent in number, the mounting disc is arranged in the wire feeding port, and the servo motor is rotationally connected between the first wire feeding disc and the second wire feeding disc through a gear disc.

[0010] As a further scheme of the application: the outer wall of the connecting block is close to the inner wall of the mounting disc, the connecting block rotates in the horizontal direction in the inside of the mounting disc, the upper wire feeding roller and the lower wire feeding roller are located on the same vertical horizontal plane, and the front end and the rear end of the outer wall of the upper wire feeding roller and the lower wire feeding roller are provided with anti-skid columns.

[0011] As a further scheme of the application: the limiting cylinder is arranged above the outer side of the limiting column, the lower wire feeding roller rotates in the horizontal direction between the two limiting cylinders, the front end and the rear end of the inside of the outer support frame are provided with guide grooves, and the lower wire feeding roller ascends and descends in the vertical direction in the guide grooves in the inside of the outer support frame.

[0012] As a further scheme of the application: the lubricating assembly is composed of a limiting disc, a three-phase motor, a rotating disc, an oil feeding plate, a partition plate, a collecting plate and a scraping plate;

[0013] Specifically, a limit plate is fixed on the left side of the guide frame, a three-phase motor is fixed inside the upper part of the guide frame, a rotating disk is rotatably connected inside the upper part of the guide frame, an oil plate is fixed on the inner wall of the rotating disk, a partition is fixed inside the rotating disk, a collecting plate is fixed on the upper right side of the guide frame, and a scraper is fixed in the middle of the collecting plate.

[0014] As a further aspect of the present invention: 8-12 partitions are arranged in a circular pattern at equal intervals on the right side of the interior of the rotating disk, and the adjacent partitions divide the interior of the rotating disk into multiple "oil storage tanks". The inner wall of the rotating disk is provided with an oil drain port that communicates with the "oil storage tanks". The middle part of the guide frame is provided with a hollow channel that communicates with the bottom right side of the collecting plate and the lower part of the interior of the "oil storage tanks".

[0015] As a further aspect of the present invention: the three-phase motor is rotatably connected between the gear disk and the rotating disk, the oil plate is disposed between adjacent oil drain ports, and the oil plate is made of sponge material.

[0016] As a further aspect of the present invention: the middle parts of the collecting plate, scraper, rotating disk, wire feeding frame, first wire feeding plate and second wire feeding plate are all located on the same horizontal plane, and the middle parts of the collecting plate, scraper, rotating disk, rotating disk, wire feeding frame, first wire feeding plate and second wire feeding plate are all provided with a middle wire feeding port with a horizontal opening.

[0017] As a further aspect of the present invention, the invention also includes the following steps:

[0018] S1: The middle steel strand is passed through the middle of the wire feeding frame, the first wire feeding plate, the second wire feeding plate, the rotating plate and the collecting plate and clamped between the conveying rollers. At the same time, the outer steel strand is passed through the middle of the wire feeding frame, the upper and lower wire feeding rollers of the first and second wire feeding plates, the rotating plate and the collecting plate and clamped between the conveying rollers.

[0019] S2: The servo motor drives the first and second wire feeding discs to rotate, and the steel strand passing through the first and second wire feeding discs rotates and winds around the middle steel strand. At the same time, the conveyor motor drives the conveyor roller to rotate, pulling and conveying the twisted steel strand.

[0020] S3: During the twisting process, the steel strand will pass through the middle of the rotating disc and the collecting plate and move to the right. At this time, the three-phase motor drives the rotating disc to rotate, causing the lubricating oil inside the rotating disc to flow out and fall onto the outside of the twisted steel strand. At the same time, the rotating disc drives the oil plate to scrape the lubricating oil on the outside of the steel strand to reduce the lubrication dead angle of the steel strand.

[0021] S4: When the lubricated steel strand passes through the collecting plate, the scraper in the middle of the collecting plate scrapes off the lubricating oil on the outside of the steel strand. After the lubricating oil falls into the collecting plate, it re-enters the interior of the rotating disk along the hollow channel on the left side of the guide frame, realizing the recycling and reuse of the lubricating oil.

[0022] 1. During the twisting process, as the steel strand passes through the center of the rotating disc and collecting plate and moves to the right, the three-phase motor drives the rotating disc to rotate. This causes the lubricating oil inside the rotating disc to flow out and fall onto the outside of the twisted steel strand. At the same time, the rotating disc drives the oil plate to contact the outside of the steel strand, scraping the lubricating oil on the outside of the steel strand. This ensures that the lubricating oil is evenly coated on the outside of the steel strand, reducing lubrication dead spots. Subsequently, when the lubricated steel strand passes through the collecting plate, the scraper in the center of the collecting plate scrapes off the lubricating oil on the outside of the steel strand. The lubricating oil then falls into the collecting plate and re-enters the interior of the rotating disc along the hollow channel on the left side of the guide frame. This achieves the recycling and reuse of the lubricating oil, effectively improving the corrosion resistance of the steel strand and reducing wear during the twisting process, further extending the service life of the twisted steel strand.

[0023] 2. When the external steel strand is embedded between the upper and lower feed rollers of the first and second feed reels, the steel strand contacts the upper feed roller and pushes the lower feed roller downward in the outer support frame. During the downward movement of the lower feed roller, it pushes the limiting cylinder downward along the outside of the limiting post, causing the limiting cylinder to compress the return spring outside the limiting post. Then, the compression of the return spring generates a rebound force that pushes the lower feed roller upward through the limiting cylinder to closely adhere to the steel strand. This ensures that the steel strand is clamped between the lower and upper feed rollers during the feeding process. When the first and second feed reels rotate and twist the conveyed steel strand, the steel strand will be pulled by the upper feed roller, lower feed roller, and outer support frame to rotate the connecting block within the mounting plate, thereby adjusting the feeding direction of the steel strand. This makes the feeding of the steel strand smoother and further improves the twisting quality of the steel strand. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a front cross-sectional view of the overall structure in this invention;

[0026] Figure 3 This is a schematic diagram of a partial structure of the installation disk in this invention;

[0027] Figure 4 This is a schematic cross-sectional view of the right side of a partial structure of the mounting disk in this invention;

[0028] Figure 5 This is a schematic diagram of a partial structure of the rotating disk in this invention;

[0029] Figure 6 This is a schematic cross-sectional view of the right side of a partial structure of the rotating disk in this invention;

[0030] Figure 7 This is a schematic diagram of a partial structure of the collecting plate in this invention.

[0031] Legend:

[0032] Workbench 1, wire feeding frame 2, main support frame 3, servo motor 301, first wire feeding reel 302, second wire feeding reel 303, mounting plate 304, connecting block 305, outer support frame 306, upper wire feeding roller 307, limit post 308, return spring 309, limit cylinder 310, lower wire feeding roller 311, guide frame 4, limit plate 401, three-phase motor 402, rotary disk 403, upper oil plate 404, partition plate 405, collecting plate 406, scraper 407, conveyor frame 5, conveyor motor 501, conveyor roller 502. Detailed Implementation

[0033] Example 1, please refer to Figures 1-7 A high-strength prestressed steel strand twisting mechanism includes a workbench 1, a wire feeding frame 2, a main support frame 3, a servo motor 301, a first wire feeding reel 302, a second wire feeding reel 303, a guide frame 4, a conveying frame 5, a conveying motor 501, and a conveying roller 502. The workbench 1, wire feeding frame 2, main support frame 3, guide frame 4, and conveying frame 5 are vertically fixed from left to right on the upper surface of the workbench 1. The servo motor 301 is fixed at the bottom of the main support frame 3. The first wire feeding reel 302 is rotatably connected inside the main support frame 3. The second wire feeding reel 303 is fixed to the right side of the first wire feeding reel 302 via a connecting rod. The conveying motor 501 is fixed at the bottom of the conveying frame 5. The conveying roller 502 is rotatably connected longitudinally to the upper part of the conveying frame 5. The mechanism is characterized in that the first wire feeding reel 302 and the second wire feeding reel 303 are both equipped with wire feeding components, and a lubrication component is provided above the guide frame 4.

[0034] The transmission assembly consists of a mounting plate 304, a connecting block 305, an outer support frame 306, an upper transmission roller 307, a limiting post 308, a return spring 309, a limiting cylinder 310, and a lower transmission roller 311.

[0035] The first wire feeding reel 302 and the second wire feeding reel 303 are both fixed with mounting plates 304. The mounting plates 304 are embedded with connecting blocks 305. The connecting blocks 305 are vertically fixed with an outer support frame 306. The outer support frame 306 is rotatably connected with an upper wire feeding roller 307. The front and rear ends of the outer support frame 306 are vertically fixed with limit posts 308. The outer side of the limit posts 308 is nested with a return spring 309. The top of the two limit posts 308 is nested with a limit cylinder 310. The two limit cylinders 310 are rotatably connected with a lower wire feeding roller 311.

[0036] The first wire feeding plate 302 and the second wire feeding plate 303 are both provided with wire feeding ports arranged in a ring and in the same number. Each wire feeding port is provided with a mounting plate 304. The servo motor 301 is rotatably connected to the first wire feeding plate 302 and the second wire feeding plate 303 through a gear plate.

[0037] When the servo motor 301 drives the first wire feeding disk 302 and the second wire feeding disk 303 to rotate, the first wire feeding disk 302 and the second wire feeding disk 303 drive the steel strands passing through them to rotate, so that these steel strands are wrapped around the outer wall of the steel strands in the middle.

[0038] The outer wall of the connecting block 305 is in close contact with the inner wall of the mounting plate 304. The connecting block 305 rotates back and forth horizontally inside the mounting plate 304. The upper feed roller 307 and the lower feed roller 311 are both on the same vertical horizontal plane. Anti-slip posts are provided at the front and rear ends of the outer walls of the upper feed roller 307 and the lower feed roller 311.

[0039] The main function of the anti-slip posts on the front and rear ends of the outer walls of the upper and lower feed rollers 307 and 311 is to prevent the steel strand from sliding back and forth between the upper feed roller 307 and the lower feed roller 311 during the rotational conveying process, so that the steel strand is always in the middle between the upper feed roller 307 and the lower feed roller 311.

[0040] When the external steel strand is embedded between the upper feed roller 307 and the lower feed roller 311 of the first feed reel 302 and the second feed reel 303, the steel strand contacts the upper feed roller 307 and pushes the lower feed roller 311 to move downward in the outer support frame 306. During the downward movement of the lower feed roller 311, it will push the limiting cylinder 310 to move downward along the outside of the limiting post 308, so that the limiting cylinder 310 squeezes the return spring 309 on the outside of the limiting post 308 and compresses it. Then, the compression of the return spring 309 generates a rebound force that pushes the lower feed roller 311 upward through the limiting cylinder 310 to closely adhere to the steel strand, so that the steel strand is clamped between the lower feed roller 311 and the upper feed roller 307 during the wire feeding process, thus preventing the steel strand from running around during the wire feeding process.

[0041] The limiting cylinder 310 is located above the outer side of the limiting post 308. The lower feed roller 311 rotates horizontally between the two limiting cylinders 310. The front and rear ends of the outer support frame 306 are provided with guide grooves. The lower feed roller 311 moves up and down vertically in the guide groove inside the outer support frame 306.

[0042] When the first wire feeding reel 302 and the second wire feeding reel 303 rotate and twist the conveyed steel strand, the steel strand will be pulled by the upper wire feeding roller 307, the lower wire feeding roller 311 and the outer support frame 306 to rotate the connecting block 305 in the mounting plate 304, thereby adjusting the wire feeding direction of the steel strand, making the wire feeding of the steel strand smoother, and further improving the twisting quality of the steel strand.

[0043] Example 2, please refer to Figures 1-7 The difference between Example 2 and Example 1 is that the lubrication assembly consists of a limiting plate 401, a three-phase motor 402, a rotating plate 403, an oiling plate 404, a partition plate 405, a collecting plate 406, and a scraper 407.

[0044] A limit plate 401 is fixed on the left side of the guide frame 4. A three-phase motor 402 is fixed inside the upper part of the guide frame 4. A rotating disk 403 is rotatably connected inside the upper part of the guide frame 4. An oil plate 404 is fixed on the inner wall of the rotating disk 403. A partition plate 405 is fixed inside the rotating disk 403. A collection plate 406 is fixed on the upper right side of the guide frame 4. A scraper 407 is fixed in the middle of the collection plate 406.

[0045] The inside right side of the rotating disk 403 has 8-12 partitions 405 arranged in a circular shape at equal intervals. The adjacent partitions 405 divide the inside of the rotating disk 403 into multiple "oil storage tanks". The inner wall of the rotating disk 403 is provided with an oil drain port that communicates with the "oil storage tanks". The middle part of the guide frame 4 is provided with a hollow channel that communicates with the bottom right side of the collection plate 406 and the lower part of the "oil storage tanks".

[0046] When the lubricating oil re-enters the "oil reservoir" formed between the adjacent partitions 405, the adjacent partitions 405 can prevent the lubricating oil from falling along the rotating disk 403 and keep the lubricating oil at the bottom inside the rotating disk 403.

[0047] The three-phase motor 402 is rotatably connected to the rotating disk 403 via a gear disk. The upper oil plate 404 is disposed between adjacent oil drain ports and is made of sponge material.

[0048] During the twisting process, as the steel strand passes through the middle of the rotating disc 403 and the collecting plate 406 and moves to the right, the three-phase motor 402 drives the rotating disc 403 to rotate, causing the lubricating oil inside the rotating disc 403 to flow out and fall onto the outside of the twisted steel strand. At the same time, the rotating disc 403 drives the oil plate 404 to contact the outside of the steel strand, scraping the lubricating oil on the outside of the steel strand, so that the lubricating oil is evenly coated on the outside of the steel strand to reduce the lubrication dead corners of the steel strand, effectively improving the corrosion resistance of the steel strand, and also reducing the wear generated during the twisting process, further improving the service life of the twisted steel strand.

[0049] The middle parts of the collecting plate 406, scraper 407, rotating disk 403, wire feeding frame 2, first wire feeding disk 302 and second wire feeding disk 303 are all on the same horizontal plane. The middle parts of the collecting plate 406, scraper 407, rotating disk 403, wire feeding frame 2, first wire feeding disk 302 and second wire feeding disk 303 are all horizontally opened with a middle wire feeding port.

[0050] Subsequently, when the lubricated steel strand passes through the collecting plate, the scraper 407 in the middle of the collecting plate 406 scrapes off the lubricating oil on the outside of the steel strand, allowing the lubricating oil to fall into the collecting plate 406 and then re-enter the interior of the rotating disk 403 along the hollow channel on the left side of the guide frame 4, thus realizing the recycling and reuse of the lubricating oil.

[0051] Example 3, please refer to Figures 1-7 The difference between Example 3 and Example 2 is that Example 3 further includes the following steps:

[0052] S1: The middle steel strand is passed through the wire feeding frame 2, the first wire feeding reel 302, the second wire feeding reel 303, the rotating disk 403 and the collecting plate 406 and clamped between the conveying rollers 502. At the same time, the outer steel strand is passed through the wire feeding frame 2, the upper wire feeding roller 307 and the lower wire feeding roller 311 of the first wire feeding reel 302 and the second wire feeding reel 303, and the middle of the rotating disk 403 and the collecting plate 406 are clamped between the conveying rollers 502.

[0053] S2: Servo motor 301 drives the first wire feeding disc 302 and the second wire feeding disc 303 to rotate, and the steel strand passing through the first wire feeding disc 302 and the second wire feeding disc 303 rotates and winds around the steel strand in the middle. At the same time, conveying motor 501 drives conveying roller 502 to rotate, and pulls and conveys the twisted steel strand.

[0054] S3: During the twisting process, the steel strand will pass through the middle of the rotating disk 403 and the collecting plate 406 and move to the right. At this time, the three-phase motor 402 drives the rotating disk 403 to rotate, causing the lubricating oil inside the rotating disk 403 to flow out from its interior and fall onto the outside of the twisted steel strand. At the same time, the rotating disk 403 drives the oil plate 404 to scrape the lubricating oil on the outside of the steel strand to reduce the lubrication dead angle of the steel strand.

[0055] S4: When the steel strand coated with lubricating oil passes through the collecting plate 406, the scraper 407 in the middle of the collecting plate 406 scrapes off the lubricating oil on the outside of the steel strand. After the lubricating oil falls into the collecting plate 406, it re-enters the interior of the rotating disk 403 along the hollow channel on the left side of the guide frame 4, realizing the recycling and reuse of the lubricating oil.

[0056] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A high-strength prestressed steel strand twisting mechanism, comprising a workbench (1), a wire feeding frame (2), a main support frame (3), a servo motor (301), a first wire feeding reel (302), a second wire feeding reel (303), a guide frame (4), a conveying frame (5), a conveying motor (501), and a conveying roller (502), wherein the workbench (1), the wire feeding frame (2), the main support frame (3), the guide frame (4), and the conveying frame (5) are vertically fixed from left to right on the upper surface of the workbench (1), the servo motor (301) is fixed at the bottom of the main support frame (3), the first wire feeding reel (302) is rotatably connected inside the main support frame (3), the second wire feeding reel (303) is fixed to the right side of the first wire feeding reel (302) by a connecting rod, the conveying motor (501) is fixed at the bottom of the conveying frame (5), and the conveying roller (502) is rotatably connected longitudinally above the inside of the conveying frame (5), characterized in that, The first wire feeding reel (302) and the second wire feeding reel (303) are both equipped with wire feeding assemblies, and the guide frame (4) is equipped with a lubrication assembly above it; The transmission assembly consists of a mounting plate (304), a connecting block (305), an outer support frame (306), an upper transmission roller (307), a limiting post (308), a return spring (309), a limiting cylinder (310), and a lower transmission roller (311); The first wire feeding reel (302) and the second wire feeding reel (303) are both fixed with mounting plates (304). The mounting plates (304) are embedded with connecting blocks (305). An outer support frame (306) is vertically fixed above the connecting blocks (305). An upper wire feeding roller (307) is rotatably connected to the upper part of the outer support frame (306). Limiting posts (308) are vertically fixed at the front and rear ends of the outer support frame (306). Return springs (309) are nested on the outer side of the limiting posts (308). Limiting cylinders (310) are nested at the top of the two limiting posts (308). A lower wire feeding roller (311) is rotatably connected between the two limiting cylinders (310). The lubrication assembly consists of a limiting plate (401), a three-phase motor (402), a rotating plate (403), an oiling plate (404), a partition plate (405), a collecting plate (406), and a scraper (407); A limit plate (401) is fixed on the left side of the guide frame (4), a three-phase motor (402) is fixed on the upper inside of the guide frame (4), a rotating disk (403) is rotatably connected to the upper inside of the guide frame (4), an oil plate (404) is fixed on the inner wall of the rotating disk (403), a partition plate (405) is fixed inside the rotating disk (403), a collection plate (406) is fixed on the upper right side of the guide frame (4), and a scraper (407) is fixed in the middle of the collection plate (406). The rotating disk (403) has 8-12 partitions (405) arranged in a circular pattern on the right side inside. The adjacent partitions (405) divide the interior of the rotating disk (403) into multiple "oil storage tanks". The inner wall of the rotating disk (403) is provided with an oil drain port that communicates with the "oil storage tanks". The middle part of the guide frame (4) is provided with a hollow channel that communicates with the bottom right side of the collecting plate (406) and the lower part of the "oil storage tanks".

2. The high-strength prestressed steel strand twisting mechanism according to claim 1, characterized in that, The first wire feeding reel (302) and the second wire feeding reel (303) are both provided with wire feeding ports arranged in a ring and in the same number. Each wire feeding port is provided with a mounting plate (304). The servo motor (301) is rotatably connected to the first wire feeding reel (302) and the second wire feeding reel (303) through a gear plate.

3. The high-strength prestressed steel strand twisting mechanism according to claim 1, characterized in that, The outer wall of the connecting block (305) is in close contact with the inner wall of the mounting plate (304). The connecting block (305) rotates back and forth horizontally inside the mounting plate (304). The upper feed roller (307) and the lower feed roller (311) are both on the same vertical horizontal plane. Anti-slip posts are provided at the front and rear ends of the outer walls of the upper feed roller (307) and the lower feed roller (311).

4. The high-strength prestressed steel strand twisting mechanism according to claim 1, characterized in that, The limiting cylinder (310) is located above the outer side of the limiting post (308). The lower feed roller (311) rotates horizontally between the two limiting cylinders (310). The front and rear ends of the outer support frame (306) are provided with guide grooves. The lower feed roller (311) moves vertically up and down in the guide groove inside the outer support frame (306).

5. The high-strength prestressed steel strand twisting mechanism according to claim 1, characterized in that, The three-phase motor (402) is rotatably connected to the rotating disk (403) via a gear disk, and the oil plate (404) is disposed between adjacent oil drain ports. The oil plate (404) is made of sponge material.

6. The high-strength prestressed steel strand twisting mechanism according to claim 1, characterized in that, The middle parts of the collecting plate (406), scraper (407), rotating disk (403), wire feeding frame (2), first wire feeding reel (302) and second wire feeding reel (303) are all located on the same horizontal plane. The middle parts of the collecting plate (406), scraper (407), rotating disk (403), wire feeding frame (2), first wire feeding reel (302) and second wire feeding reel (303) are all provided with a middle wire feeding port with a horizontal opening.

7. The high-strength prestressed steel strand twisting mechanism according to any one of claims 1-6, characterized in that, Specifically, it also includes the following steps: S1: The middle steel strand is passed through the wire feeding frame (2), the first wire feeding plate (302), the second wire feeding plate (303), the rotating plate (403) and the collecting plate (406) and clamped between the conveying rollers (502). At the same time, the outer steel strand is passed through the wire feeding frame (2), the upper wire feeding roller (307) and the lower wire feeding roller (311) of the first wire feeding plate (302) and the second wire feeding plate (303), and the middle of the rotating plate (403) and the collecting plate (406) are clamped between the conveying rollers (502). S2: The servo motor (301) drives the first wire feeding disc (302) and the second wire feeding disc (303) to rotate. The steel strand passing through the first wire feeding disc (302) and the second wire feeding disc (303) rotates and winds around the steel strand in the middle. At the same time, the conveying motor (501) drives the conveying roller (502) to rotate, and pulls and conveys the twisted steel strand. S3: During the twisting process, the steel strand will pass through the middle of the rotating disc (403) and the collecting plate (406) and move to the right. At this time, the three-phase motor (402) drives the rotating disc (403) to rotate, so that the lubricating oil inside the rotating disc (403) flows out from its interior and falls onto the outside of the twisted steel strand. At the same time, the rotating disc (403) drives the oil plate (404) to scrape the lubricating oil on the outside of the steel strand to reduce the lubrication dead angle of the steel strand. S4: When the steel strand coated with lubricating oil passes through the collecting plate (406), the scraper (407) in the middle of the collecting plate (406) scrapes off the lubricating oil on the outside of the steel strand. After the lubricating oil falls into the collecting plate (406), it re-enters the interior of the rotating disk (403) along the hollow channel on the left side of the guide frame (4), so as to realize the recycling and reuse of the lubricating oil.

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