Automatic chain type stringing device for seaweed seedling shell

Abstract

The application discloses a kind of automatic chain stringing device of laver breeding shell, and the stringing device stringing device includes follow-up type storage feeding mechanism, feed mechanism, puncture mechanism, line knot forming mechanism and power part, the knot tying process of the application is reliable, and the anti-dispersion capacity is strong.Double-line chain ring process is used when stringing and knot tying, and the surface rope and the bottom rope are cross-nested and locked, the generated rope knot prevents the dispersion tension greatly, and can perfectly adapt to the complex water flow fluctuation and pulling environment in breeding pond.

Description

Technical Field

[0001] This invention belongs to the field of shell feeding, bundling and knotting technology, specifically relating to an automatic chain-type stringing device for seaweed seedling cultivation. Background Technology

[0002] Seaweed and other algae crops often adopt a cultivation model of hanging culture with attached shells during the seedling stage. This involves stringing together seedling shells with attached seaweed filaments on seedling ropes according to the aquaculture requirements, with consistent hole spacing and uniform shell spacing, and then suspending them in the seedling pond. This method has advantages such as high space utilization, uniform light exposure, and fewer diseases and algae, resulting in significant cost reduction and efficiency improvement. It has been given priority development and widespread application.

[0003] To ensure uniform spacing and secure knots after stringing together the seedling shells, the stringing process requires precise feeding displacement and orderly piercing of the guide wire, achieving the goal of no misaligned holes and no shell breakage. Currently, this shell stringing process relies entirely on manual labor, and there is no dedicated automated stringing equipment in the industry. This manual stringing method is extremely labor-intensive, inefficient, and makes it difficult to guarantee consistent hole and knot spacing in large-scale operations, resulting in extremely high labor costs. This has become a major technical bottleneck restricting the expansion of suspended culture operations.

[0004] If one attempts to automate this process by borrowing from existing conventional automated sewing or bag-sewing equipment, there are insurmountable technical drawbacks: Existing bag-sewing equipment mainly relies on the friction provided by the bottom teeth. Since seedling shells are hard, irregular, and discrete materials with fixed holes, they are prone to slippage, misalignment of holes, or even crushing of shells during continuous high-speed operation. In addition, existing bag-sewing machines mostly use a simple crank-slider mechanism for needle insertion. When faced with the complex spatial avoidance and stringing requirements of shell production, the existing mechanism is unable to meet the specific stroke and pause time requirements.

[0005] This invention fills the industry gap in automated stringing of seaweed seedling shells, overcoming problems such as low manual efficiency and inaccurate hole alignment, fragile shells, and broken needles caused by friction feeding when borrowing from sewing and packaging equipment from other fields. It designs an automated device that can simultaneously use the precise spacing of the ball screw and the needle insertion of the rod mechanism for chain stringing, aiming to realize the replacement of manual labor in seaweed stringing, significantly improve work efficiency, reduce energy consumption, and ensure accurate hole alignment and high-quality threading. Summary of the Invention

[0006] The purpose of this invention is to design an automatic chain-type stringing device for seaweed seedling cultivation.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] An automatic chain-type stringing device for seashells used in laver seedling cultivation is disclosed. The stringing device includes a follow-up material storage and feeding mechanism, a feeding mechanism, a piercing mechanism, a knot forming mechanism, and a power unit. The follow-up material storage and feeding mechanism includes a feeding unit and a receiving unit. The feeding unit delivers the seashells to the receiving unit, and the piercing mechanism and the knot forming mechanism string the seashells on the receiving unit in a chain-type manner.

[0009] The feeding mechanism is used to drive the feeding unit to feed materials, and also to drive the piercing mechanism and the knot forming mechanism to move.

[0010] The puncture mechanism includes a needle assembly. The crankshaft drives the needle assembly to reciprocate up and down through the connecting rod assembly, enabling the needle of the needle assembly to puncture and withdraw. It works in conjunction with the following knot forming mechanism to complete the double-chain stringing of the shells.

[0011] The knot forming mechanism includes a camshaft, a disc cam and a cylindrical cam coaxially mounted on the camshaft, which respectively drive the disc cam follower and the cylindrical cam follower mounted on the same hook actuating rod, so that the hook actuating rod slides along its axis and swings around its axis, thereby driving the hook at the front end to generate a spatial motion trajectory that combines axial translation and circumferential swing, so as to complete the double-line chain loop forming action in coordination with the needle head;

[0012] The power unit provides power to both the piercing mechanism and the knot forming mechanism.

[0013] Furthermore, the feeding unit includes a feeding base located on the bottom base. The feeding base has two grooves on its top. The bottom of both sides of the follower pusher slide is vertically connected to a flat groove cam plate, and both are installed in the grooves, so that the follower pusher slide and the flat groove cam plate move along the grooves. The top of the follower pusher slide carries a contoured storage box. A through-type reference guide pin is installed in the contoured storage box. Stacked shell materials are placed in the contoured storage box and pass through the through-hole of the shell through the through-type reference guide pin.

[0014] Furthermore, the receiving unit includes a lifting platform support base located on the bottom base. The lifting platform support base is equipped with a lifting guide shaft. The upper material support seat and the contouring pin-removing unloading table are sleeved on the lifting guide shaft through their internal shaft holes. The upper material support seat is located above the contouring pin-removing unloading table. At the same time, a separate material cutting shovel is provided on one side of the upper material support seat. The follow-up material ejection slider is embedded in the trajectory groove of the flat groove cam plate and connected to one end of the cam linkage guide pin. The other end of the cam linkage guide pin is fixedly connected to the contouring pin-removing unloading table.

[0015] Furthermore, the power unit includes a stepper motor, which is mounted on a frame via a motor bracket. A primary driving spur gear is mounted on the output shaft of the stepper motor and meshes with a primary driven spur gear. A double-ended worm gear is coaxially mounted with the primary driven spur gear, and the double-ended worm gear meshes with the lower worm wheel in a spatial cross perpendicular position. The worm wheel and the secondary driving gear are sequentially coaxially sleeved and mounted on the worm wheel driven shaft.

[0016] Furthermore, the secondary drive gear meshes with the gear on the front crankshaft, and a synchronous pulley is coaxially mounted on the other end of the crankshaft. The upper synchronous pulley is driven by the lower synchronous pulley on the drive shaft via a synchronous belt. The drive shaft and the camshaft are connected by a pair of mutually perpendicular meshing bevel gears.

[0017] Furthermore, the puncture mechanism includes a crankshaft with an eccentric pin on its end face. The two ends of the crankshaft eccentric connecting rod are respectively hinged to the eccentric pin and the right end of the main transmission rocker arm. The middle section of the main transmission rocker arm is mounted on the side plate via a pin. The two ends of the guide rocker arm are respectively hinged to the left end of the main transmission rocker arm and the needle bar frame. The needle bar is mounted on the needle bar frame, and a needle tip is provided below the needle bar.

[0018] Furthermore, the wire knot forming mechanism includes a portal frame, with the camshaft mounted on the portal frame via cam bearing seats at both ends. A disc cam and a cylindrical cam are sequentially sleeved and coaxially fixed to the camshaft. The bottom hook actuating rod slides through a guide hole below the portal frame. The disc cam follower and the cylindrical cam follower are fixed side-by-side to the middle section of the bottom hook actuating rod, respectively cooperating with the outer contour surface of the disc cam and the end face curve groove of the cylindrical cam. A return spring is sleeved on the bottom hook actuating rod, providing a preload force to make the follower conform to the cam contour. The hook is mounted on a hook holder, which is fastened to the front end of the bottom hook actuating rod.

[0019] The above technical solution can achieve the following beneficial effects:

[0020] The knotting process of this invention is reliable and has strong resistance to unraveling. The double-chain loop-forming process is used during string making and knotting, with the top and bottom ropes interlocked and locked together. The resulting knots have extremely high tensile strength to prevent unraveling, avoiding the problems of weak and loose knots caused by manual knotting. This ensures the reliability of aquaculture operations and perfectly adapts to the complex water flow fluctuations and pulling environment in the seedling pond.

[0021] Compared to conventional mechanical threading equipment, the feeding system of this invention uses ball screw variable pitch control, completely breaking the fixed pitch (equidistant stitch) limitation of traditional sewing equipment. Through electronic control program, it realizes non-equidistant jump feeding, which involves long-distance crossing outside the shell and short-distance fixed point between holes inside the shell. This not only greatly improves the hole positioning accuracy, but also perfectly matches the discrete physical morphology of hard, perforated seashells, fundamentally avoiding the problems of hole misalignment, shell breakage, and needle breakage caused by slippage interference from traditional bottom friction teeth.

[0022] Addressing the challenges of thick, irregularly shaped hard shells used in laver seedling cultivation, this invention abandons the conventional crank-slider mechanism and innovatively designs a six-bar piercing mechanism consisting of a crank, a main transmission rocker, and a guide rocker. This mechanism utilizes the geometric amplification effect of the connecting rods, ensuring that the needle bar has a linear stroke sufficient to traverse the thickness of the hard shell—a stroke of at least 40mm. This provides ample space for safe needle retraction during shell translation and feeding, guaranteeing smooth and stable processing of thick, discrete materials during high-speed stringing.

[0023] It achieves synchronous transmission from the power source to the two execution ends (needle and hook), ensuring the timing accuracy of the complex action chain of needle insertion, thread hooking, looping, and needle retraction, and providing a foundation for high-speed, stable, and reliable automated cycles.

[0024] The follow-up material feeding mechanism uses a cam-linked guide pin and a follow-up ejector slider to automatically drop the bottom layer of shells into the contour-following ejector table. Then the storage box retracts, completing the precise separation and retention of individual shells. This prevents shells from tilting, flipping, or squeezing each other during the feeding process, thus avoiding shell breakage and jamming. At the same time, it ensures that the hole of each shell is precisely aligned with the needle of the piercing mechanism after it is dropped, eliminating the need for secondary adjustments. This completely replaces the manual action of placing shells one by one, achieving automatic feeding without stopping the machine, greatly improving stringing efficiency and reducing labor intensity. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an automatic stringing device for laver seedling cultivation.

[0026] Figure 2 This is an initial state diagram of the automatic string-making device for laver seedling cultivation.

[0027] Figure 3 This is a 3D diagram of a follow-up material storage and feeding mechanism.

[0028] Figure 4 This is an exploded view of the follow-up material storage and feeding mechanism.

[0029] Figure 5 It is a three-dimensional diagram of the piercing mechanism and the knot forming mechanism.

[0030] Figure 6 This is a front view of the piercing mechanism and the knot forming mechanism.

[0031] Figure 7 This is an exploded view of the piercing mechanism and the knot forming mechanism.

[0032] Figure 8 This is a schematic diagram of the power unit.

[0033] Figure 9 This is a front view of the puncture mechanism.

[0034] Figure 10 It is a 3D diagram of the puncture mechanism.

[0035] Figure 11 This is a 3D diagram of a knot-forming mechanism.

[0036] Figure 12 This is an exploded view of the knot forming mechanism.

[0037] Figure 13 This is a schematic diagram of a seashell's double-chain-like winding and knotting.

[0038] Figure 14 This is a diagram showing the state of the crochet hook moving forward axially.

[0039] Figure 15 This is a diagram illustrating the insertion of the needle.

[0040] Figure 16 This is a diagram showing the state where the crochet hook retracts in a circular motion and moves backward axially.

[0041] Figure 17 It is a diagram showing the state of the crochet hook oscillating in a circular motion to hook the line.

[0042] Figure 18 This is a diagram showing the axial movement of the crochet hook.

[0043] Figure 19 This is a diagram illustrating the second needle insertion.

[0044] Figure 20 This is a diagram showing the state of the conformal storage bin reaching the top of the conformal depin dropping platform.

[0045] Figure 21 This is the status diagram of entering the workstation.

[0046] Figure 22 This is a string state diagram.

[0047] Figure 23 This is a schematic diagram of cyclic string generation.

[0048] In the picture:

[0049] In the diagram: 1. Stepper motor; 2. Double-ended worm gear; 3. Motor frame; 4. First-stage driven spur gear; 5. First-stage driving spur gear; 6. Worm gear; 7. Worm gear driven shaft; 8. Second-stage driving gear; 9. Crankshaft; 10. Synchronous belt; 11. Synchronous belt pulley; 12. String motor driver; 13. Drive shaft; 14. Ball screw motor driver; 15. Bevel gear; 16. Ball screw stepper motor; 17. Ball screw slide; 18. Cam bearing housing; 19. Disc cam; 20. Disc cam follower; 21. Cylindrical cam; 22. Cylindrical cam follower; 23. Bottom hook actuator; 24. Crochet holder; 25. Hook. 26. Needle, camshaft, 27. Frame, 28. Connecting rod mounting side plate, 29. Crank eccentric connecting rod, 30. Main transmission rocker arm, 31. Guide rocker arm, 32. Needle bar, 33. Needle bar holder, 34. Needle head, 35. Bottom base, 36. Follower pusher slide, 37. Contouring storage box, 38. Through-type reference guide pin, 39. Lifting guide shaft, 40. Separable cutting paddle, 41. Upper material support seat, 42. Flat groove cam plate, 43. Follower ejector slider, 44. Cam linkage guide pin, 45. Contouring ejector dropper, 46. Baffle, 47. Lifting platform bearing base, 48. Feeding base, 49. Return spring. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1-23 The present invention is further illustrated by the embodiments:

[0051] like Figure 1-23 As shown, an automatic chain-type stringing device for seaweed seedling cultivation is disclosed. The stringing device includes a follow-up material storage and feeding mechanism, a feeding mechanism, a piercing mechanism, and a knot forming mechanism. The follow-up material storage and feeding mechanism includes a feeding unit and a receiving unit. The feeding mechanism drives the feeding unit, the piercing mechanism, and the knot forming mechanism to move left and right.

[0052] Figure 1-4 As shown, the follow-up material feeding mechanism includes a feeding unit and a receiving unit. The feeding unit includes a feeding base 48 located on the bottom base 35. The top of the feeding base 48 is provided with two sliding grooves. The bottom of both sides of the follow-up pushing slide 36 is vertically connected to the flat groove cam plate 42, and the two are installed in the sliding groove. The flat groove cam plate 42 is driven to move left and right by the feeding mechanism, so that the follow-up pushing slide and the flat groove cam plate move along the sliding groove. The top of the follow-up pushing slide carries a contoured storage box 37. A through-type reference guide pin 38 is installed in the contoured storage box 37. Stacked shell materials with double holes are placed in the contoured storage box 37, and the through-type reference guide pin 38 passes through the through hole of the shell.

[0053] The receiving unit includes a lifting platform support base 47 located on a bottom base. The lifting platform support base 47 is equipped with a lifting guide shaft 39. An upper material support 41 and a contoured pin-removing unloading platform 45 are fitted onto the lifting guide shaft 39 through their internal shaft holes. The upper material support 41 is positioned above the contoured pin-removing unloading platform 45. A separate material cutting lever 40 is provided on one side of the upper material support 41, and a U-shaped baffle 46 is provided on the other side of the upper material support 41 and the contoured pin-removing unloading platform 45. A follow-up ejection slider 43 is embedded in the trajectory groove of a planar groove cam plate 42 and connected to one end of a cam linkage guide pin 44. The other end of the wheel linkage guide pin 44 is fixedly connected to the contouring pin removal and unloading table, thereby establishing a mechanical linkage constraint between the horizontal and vertical moving parts. It should be noted that the follow-up unloading slider 43 is provided with a cam linkage guide pin groove in the middle. The cam linkage guide pin groove consists of a horizontal groove on the left and a slightly downward inclined groove on the right. The slightly downward inclined groove is consistent with the split cutting material pawl 40. This ensures that the contouring storage box 37 can smoothly enter the upper material support seat 41. The hole in the middle of the upper material support seat 41 allows the shell to fall smoothly and stay temporarily on the contouring pin removal and unloading table 45, which is convenient for the subsequent piercing mechanism and the wire knot forming mechanism to string the shell.

[0054] The feeding mechanism includes a ball screw stepper motor 16 and a ball screw slide 17 mounted on the bottom base, which are used to drive the follow-up material storage and feeding mechanism, the piercing mechanism and the wire knot forming mechanism. The ball screw stepper motor 16 and the ball screw slide 17 are coaxially connected and fixed to the bottom base. The front end of the ball screw slide 17 is connected to the planar groove cam plate 42, and the top of the ball screw slide 17 is provided with a frame 27. When the ball screw stepper motor 16 drives the ball screw slide 17 to move to the left, the contour storage box 37 is moved to the left via the planar groove cam plate 42 and the follower pusher slide 36, so that the contour storage box 37 can be moved off the upper material support seat 41. Similarly, when the ball screw stepper motor 16 drives the ball screw slide 17 to move to the right, the contour storage box 37 is moved to the right via the planar groove cam plate 42 and the follower pusher slide 36, so that the contour storage box 37 can be sent to the upper material support seat 41. Since the piercing mechanism and the knot forming mechanism are both mounted on the ball screw slide 17 via the frame 27, the piercing mechanism and the knot forming mechanism will move left and right with the ball screw slide 17.

[0055] Figure 6 , 7 As shown in Figures 9 and 10, the puncture mechanism includes a needle assembly. The crankshaft 9 drives the needle assembly to reciprocate up and down through the connecting rod assembly, enabling the needle of the needle assembly to puncture and retract. In conjunction with the following knot forming mechanism, the double-chain stringing of seedling shells is completed.

[0056] The puncture mechanism includes a crankshaft 9, with an eccentric pin on the end face of the crankshaft. The two ends of the crank eccentric connecting rod 29 are respectively hinged to the eccentric pin and the right end of the main transmission rocker arm 30. The middle section of the main transmission rocker arm is mounted on the connecting rod mounting side plate 28 via a pin. The two ends of the guide rocker arm 31 are respectively hinged to the left end of the main transmission rocker arm and the needle bar frame 33. The needle bar 32 is mounted on the needle bar frame, and a needle head 34 is provided below the needle bar.

[0057] Figure 6 and Figure 7 As shown, the knot forming mechanism includes a camshaft 26, a disc cam 19 and a cylindrical cam 21 coaxially mounted on the camshaft, which respectively drive the disc cam follower 20 and the cylindrical cam follower 22 mounted on the same bottom hook needle actuator 23, so that the hook needle actuator slides along its axis and swings around its axis. The hook needle 25 is mounted on the bottom hook needle actuator 23 through the hook needle holder 24, thereby driving the front end hook needle 25 to generate a spatial motion trajectory that combines axial translation and circumferential swing, so as to complete the double-line chain ring forming action in coordination with the needle of the puncture mechanism.

[0058] Figure 11 and Figure 12 As shown, further explanation is as follows: The bottom hook actuator 23 slides through the guide holes of the cam bearing seat 18 and the frame 27; the disc cam follower 20 and the cylindrical cam follower 22 are fixedly connected side by side to the middle section of the bottom hook actuator 23, and respectively cooperate with the outer contour surface of the disc cam 19 and the end face curve groove of the cylindrical cam 21; the return spring 49 is sleeved on the bottom hook actuator 23, providing a preload force to make the follower conform to the cam profile. The hook 25 is assembled on the hook holder 24, and the hook holder 24 is fastened to the front end of the bottom hook actuator 23, thus forming a complete assembly as shown. Figure 11 The complete spatial ring execution component is shown.

[0059] Figure 6 and Figure 8As shown, the power unit is used to synchronously transmit power to the piercing mechanism and the knot forming mechanism. The power unit includes a stepper motor 1, which is mounted on the frame via a motor bracket 3. A first-stage driving spur gear 5 is mounted on the output shaft of the stepper motor and meshes with a first-stage driven spur gear 4. A double-headed worm gear 2 is coaxially mounted with the first-stage driven spur gear, and the double-headed worm gear 2 meshes with the lower worm wheel 6 in a spatial cross perpendicular mesh. The worm wheel and the second-stage driving gear 8 are coaxially sleeved and mounted on the worm wheel driven shaft 7. The second-stage driving gear meshes with the gear on the crankshaft of the piercing mechanism, thereby providing power to the piercing mechanism. A synchronous pulley 11 is coaxially mounted on the other end of the crankshaft. The upper synchronous pulley and the lower synchronous pulley 11 on the transmission shaft 13 are driven by a synchronous belt 10. The transmission shaft and the camshaft 26 of the knot forming mechanism are connected by a pair of mutually perpendicular meshing bevel gears 15, thus providing power to the knot forming mechanism.

[0060] The core operating logic of this device employs a semi-closed-loop control strategy that coordinates horizontal servo feed with vertical piercing and knotting. The overall operating cycle can be divided into the following four main stroke stages:

[0061] Step 1: Material feeding and station entry

[0062] Action description: When the device is in the initial standby state ( Figure 2 As shown), the needle of the piercing mechanism is located at the upper stop point, and the follow-up pusher slide and gravity-type contour storage box are located at the starting end (left side) of the feeding base 48. It should be noted that at this time, the perforated shells are already neatly stacked in the feeding base 48. When feeding, the ball screw stepper motor 16 of the feeding mechanism drives the ball screw slide 17 to move to the right, and the pusher slide pushes the gravity-type contour storage box to move to the right along the slide groove. Under the guidance of the cam linkage guide pin groove, the contour storage box gradually enters the separate cutting plate 40, and finally reaches the upper material support 41. Figure 20 (As shown).

[0063] Step 2: Separation and Retention of Individual Shells

[0064] When the gravity-fed contouring storage box reaches above the upper material support 41, the bottommost shell in the contouring storage box falls from the middle hole of the upper material support 41 onto the contouring pin-removing and unloading table 45. Subsequently, the ball screw stepper motor 16 reverses, driving the storage box to move to the left, detaching from the upper material support 41 and returning to the starting position. At this time, the ball screw slide 17 moves to the left, moving the piercing mechanism and the wire knot forming mechanism to the vicinity of the contouring pin-removing and unloading table 45. Figure 21 As shown in the figure, the needle of the piercing mechanism is above the contour stripping and unloading table 45, and the hook 25 of the knot forming mechanism is below the contour stripping and unloading table 45.

[0065] Step 3: Needle insertion and knot formation

[0066] Figure 22 and Figure 23 As shown, the motor of the power unit starts, and the hook of the knot-forming mechanism moves to below the shell hole. Through the crankshaft and connecting rod assembly, it drives the needle bar and its needle head to move rapidly downward in a straight line. The needle head accurately centers and pierces the shell hole position stuck on the worktable (upper material support). After the needle head is pressed down to the lower stop point, the upper and lower parts cooperate to complete the double-thread chain stitch knot ( Figure 13 As shown in the figure, after the knot is tied, the needle quickly springs back to the upper stop point.

[0067] Step 4: Reset Cycle

[0068] Repeat step one to execute the next loop cycle, thus achieving chained string production.

[0069] The specific process of double-thread chain stitching and knotting is as follows:

[0070] (1) The hook of the knot-forming mechanism carries the bottom line (blue line) to the front of the needle tip. Figure 14 );

[0071] (2) The needle, with the thread (red thread) attached, is inserted and passes through the loop behind the crochet hook. Figure 15 );

[0072] (3) The crochet hook swings out in a circular motion. Figure 16 );

[0073] (4) When the needle tip retracts upward by 4mm, the hook hook swings circumferentially to feed while simultaneously retracting axially, hooking the loop formed by the retraction of the needle bar behind the needle tip. Figure 17 );

[0074] (5) The entire device is displaced along the axial direction of the hook rod to above the second hole, and the surface and bottom double lines form an inclined hinged state to be locked under their own tension and relative displacement. Figure 18 );

[0075] (6) When the needle performs the next insertion, the newly generated surface loop accurately penetrates the bottom loop left below in the previous cycle, completing the secondary spatial locking. Figure 19 ).

[0076] The above actions are repeated continuously, generating anti-unraveling double-line chain knots under the shell. After each knot is completed, the ball screw slide 17, according to the instructions of the electronic control system, performs non-equidistant jump feed of long-distance crossing outside the shell and short-distance fixed point inside the shell, so that the device can seamlessly enter the next automated stringing cycle.

[0077] The above descriptions are all preferred embodiments of the present invention. For those skilled in the art, any modifications to the present invention in various equivalent forms without departing from the principle of the present invention shall fall within the protection scope of the appended claims.

Claims

1. An automatic chain-type stringing device for seashells used in laver seedling cultivation, characterized in that: The stringing device includes a follow-up material storage and feeding mechanism, a feeding mechanism, a piercing mechanism, a knot forming mechanism, and a power unit; wherein, the follow-up material storage and feeding mechanism includes a feeding unit and a receiving unit; the feeding unit delivers the shells to the receiving unit, and the piercing mechanism and the knot forming mechanism string the shells on the receiving unit in a chain-like manner. The feeding mechanism is used to drive the feeding unit to feed materials, and also to drive the piercing mechanism and the knot forming mechanism to move. The puncture mechanism includes a needle assembly. The crankshaft drives the needle assembly to reciprocate up and down through the connecting rod assembly, enabling the needle of the needle assembly to puncture and withdraw. It works in conjunction with the following knot forming mechanism to complete the double-chain stringing of the shells. The knot forming mechanism includes a camshaft, a disc cam and a cylindrical cam coaxially mounted on the camshaft, which respectively drive the disc cam follower and the cylindrical cam follower mounted on the same hook actuating rod, so that the hook actuating rod slides along its axis and swings around its axis, thereby driving the hook at the front end to generate a spatial motion trajectory that combines axial translation and circumferential swing, so as to complete the double-line chain loop forming action in coordination with the needle head; The power unit provides power to both the piercing mechanism and the knot forming mechanism.

2. The automatic chain-type stringing device for seaweed seedling cultivation according to claim 1, characterized in that: The feeding unit includes a feeding base located on the bottom base. The feeding base has two grooves on the top. The bottom of the two sides of the follower pusher slide is vertically connected to the flat groove cam plate, and the two are installed in the groove, so that the follower pusher slide and the flat groove cam plate move along the groove. The top of the follower pusher slide carries a contoured storage box. A through-type reference guide pin is installed in the contoured storage box. Stacked shell materials are placed in the contoured storage box and pass through the through hole of the shell through the through-type reference guide pin.

3. The automatic chain-type stringing device for seashells used in laver seedling cultivation according to claim 1, characterized in that: The receiving unit includes a lifting platform support base located on the bottom base. The lifting platform support base is equipped with a lifting guide shaft. The upper material support and the contouring pin removal and unloading platform are sleeved on the lifting guide shaft through their internal shaft holes. The upper material support is located above the contouring pin removal and unloading platform. At the same time, a separate material cutting pawl is provided on one side of the upper material support. The follow-up material ejection slider is embedded in the trajectory groove of the flat groove cam plate and connected to one end of the cam linkage guide pin. The other end of the cam linkage guide pin is fixedly connected to the contouring pin removal and unloading platform.

4. The automatic chain-type stringing device for seaweed seedling cultivation according to claim 1, characterized in that: The power unit includes a stepper motor, which is mounted on a frame via a motor bracket. A primary driving spur gear is mounted on the output shaft of the stepper motor and meshes with a primary driven spur gear. A double-headed worm gear is coaxially mounted with the primary driven spur gear, and the double-headed worm gear meshes with the lower worm wheel in a spatial cross perpendicular position. The worm wheel and the secondary driving gear are coaxially sleeved and mounted on the driven shaft of the worm wheel in sequence.

5. The automatic chain-type stringing device for seaweed seedling cultivation according to claim 4, characterized in that: The secondary drive gear meshes with the gear on the front crankshaft, and a synchronous pulley is coaxially mounted on the other end of the crankshaft. The upper synchronous pulley is connected to the lower synchronous pulley on the drive shaft via a synchronous belt. The drive shaft and the camshaft are connected by a pair of mutually perpendicular meshing bevel gears.

6. The automatic chain-type stringing device for seashells used in laver seedling cultivation according to claim 1, characterized in that: The puncture mechanism includes a crankshaft with an eccentric pin on its end face. The two ends of the crankshaft eccentric connecting rod are respectively hinged to the eccentric pin and the right end of the main transmission rocker arm. The middle section of the main transmission rocker arm is mounted on the side plate via a pin. The two ends of the guide rocker arm are respectively hinged to the left end of the main transmission rocker arm and the needle bar frame. The needle bar is mounted on the needle bar frame, and the needle head is located below the needle bar.

7. The automatic chain-type stringing device for seaweed seedling cultivation according to claim 1, characterized in that: The wire knot forming mechanism includes a portal frame. The camshaft is mounted on the portal frame through cam bearing seats at both ends. A disc cam and a cylindrical cam are sequentially sleeved and coaxially fixed to the camshaft. The bottom hook actuating rod slides through the guide hole below the portal frame. The disc cam follower and the cylindrical cam follower are fixed side by side to the middle section of the bottom hook actuating rod and respectively cooperate with the outer contour surface of the disc cam and the end face curve groove of the cylindrical cam. A return spring is sleeved on the bottom hook actuating rod to provide preload tension to make the follower conform to the cam contour. The hook is mounted on the hook holder, and the hook holder is fastened to the front end of the bottom hook actuating rod.

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