A shrimp fry bag sealing and cutting and leak-proof heat sealing device

Abstract

The present application relates to the processing technical field of shrimp seedling bag, in particular to a shrimp seedling bag sealing and cutting and leak-proof heat sealing device, which comprises a seat plate, a rhombus part is arranged between two lower supporting plates, a shaft column is arranged in the middle of one side of the rhombus part and connected with the rhombus part, a torsional spring is arranged between the end of the shaft column and the lower end of the lower supporting plate, an upper connecting plate is arranged on the upper side of the rhombus part, a lower connecting plate is arranged on the lower side of the rhombus part, a short guide column is arranged at the two ends of the upper connecting plate, a long guide column is arranged at the two ends of the lower connecting plate, an upper electric heating seat is arranged between the upper ends of the two long guide columns, a lower electric heating seat is arranged between the upper ends of the two short guide columns, a power element is arranged on the lower surface of the seat plate and matched with the torsional spring to switch the lower electric heating seat and the upper electric heating seat between closing and unfolding, the present application has the following beneficial effects: the opening and closing stroke is shared by the upper electric heating seat and the lower electric heating seat, the time consumption of single sealing and cutting action is shortened, the interval time between two processes is shortened, and the continuous sealing and cutting capacity of the shrimp seedling bag is improved.

Description

Technical Field

[0001] This invention relates to the field of shrimp larvae bag processing technology, specifically a shrimp larvae bag sealing and leak-proof heat sealing device. Background Technology

[0002] Before transporting shrimp larvae, sealed plastic bags are needed to hold the water and shrimp larvae. The bag opening heat sealing and cutting equipment is the core equipment in the packaging process. It relies on a pair of cooperating electric heating seats to simultaneously complete the heat-melting sealing of the bag opening and the cutting of the bag body. It can achieve the sealing of the shrimp larvae bag to prevent leakage and the separation of individual packaging bags in one go, avoiding water seepage from the bag opening during transportation and causing oxygen deficiency and loss of shrimp larvae.

[0003] Existing heat-sealing and cutting equipment uses a single-action heating seat structure. One set of electric heating seats remains stationary, while the other set is moved back and forth by a cylinder to achieve the opening and closing of the two sets of electric heating seats and complete the heat-sealing process. The entire set of equipment has only one side of the component with a moving stroke. The entire movement of a single heat-sealing cycle is completed by a single electric heating seat. Each opening and closing requires a long action time, and there is a long interval between two adjacent heat-sealing operations. When continuously packaging shrimp larvae in batches, the frequent unidirectional reciprocating motions continuously lengthen the process intervals. The number of shrimp larvae bags that can be heat-sealed and cut per unit time is limited, resulting in low overall packaging efficiency and restricting the production efficiency of shrimp larvae packaging. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a shrimp seedling bag sealing and leak-proof heat sealing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a shrimp seedling bag sealing and leak-proof heat-sealing device, comprising a base plate, two lower support plates mounted on the lower surface of the base plate, a rhomboid portion between the two lower support plates, a shaft column connected and fixed to the rhomboid portion passing through the center of one side of the rhomboid portion, a torsion spring installed between the end of the shaft column and the lower end of the lower support plate, an upper connecting plate on the upper side of the rhomboid portion, a lower connecting plate on the lower side of the rhomboid portion, and connecting arms rotatably connected to both ends of the rhomboid portion, with the ends of the two connecting arms furthest from the rhomboid portion respectively... The upper and lower connecting plates are rotatably connected. Short guide columns are installed at both ends of the upper connecting plate, and long guide columns are installed at both ends of the lower connecting plate. Both the short and long guide columns penetrate the base plate and slide in contact with it. An upper electric heating seat is installed between the upper ends of the two long guide columns, and a lower electric heating seat is installed between the upper ends of the two short guide columns. The upper and lower electric heating seats cooperate with each other to heat seal the shrimp seedling bags. A power component is installed on the lower surface of the base plate, which cooperates with a torsion spring to switch the lower and upper electric heating seats between closing and opening. Traditional heat-sealing equipment uses only a single set of electric heating seats, with the entire opening and closing stroke completed by a single component. This results in a long stroke, a long time for each sealing and cutting cycle, large intervals between continuous packaging processes, and limited production capacity. This structure uses a diamond-shaped part to swing and link two sets of connecting arms, synchronously driving the long guide column to move the upper electric heating seat and the short guide column to move the lower electric heating seat in both directions. The heat-sealing stroke is shared by the upper and lower heating seats, reducing the movement distance of a single component by half for the same bonding distance. This shortens the time for a single opening and closing action, reduces the interval between sealing and cutting processes of adjacent shrimp seedling bags, and increases the continuous batch packaging capacity.

[0006] Specifically, the power component includes a servo motor. A side seat is mounted on one side of the lower surface of the base plate, and the servo motor is mounted on the side of the side seat facing away from the lower support plate. A transmission shaft is mounted on the output shaft of the servo motor. A cam is sleeved on the transmission shaft and fixed to it. A rolling bearing is provided on the upper side of the cam. The rolling bearing is connected to the rhomboid part through an adjustment component. The shaft column and torsion spring form an elastic reset structure. After the cam in the power component pushes the rhomboid part to swing and complete the heat sealing, the torsion spring automatically pulls the rhomboid part back to its original position by its own torque. There is no need for the servo motor to rotate back, which simplifies the servo motor control logic and reduces the complexity of the electronic control program. The long guide column and short guide column pass through the base plate to form a vertical sliding limit, ensuring that the upper and lower electric heating seats are always horizontally aligned and in contact, and there will be no problems such as left and right offset, heat sealing misalignment and leakage. The heat-melted seal of the shrimp seedling bag opening is uniform and dense.

[0007] Specifically, the adjustment assembly includes a horizontal shaft, a horizontal hole at one end of the rhomboid portion, a horizontal shaft inserted into the horizontal hole, the horizontal shaft being arranged parallel to the shaft column, a rolling bearing installed at one end of the horizontal shaft, a threaded head installed at the end of the horizontal shaft away from the rolling bearing, an L-shaped plate provided on the side of the horizontal hole away from the rolling bearing, one end of the L-shaped plate being connected and fixed to the rhomboid portion, a screw hole provided on the side of the L-shaped plate facing the horizontal hole, the screw hole being concentrically arranged with the horizontal hole, the threaded head being threadedly connected to the screw hole, a hexahedron for engaging a wrench installed at the end of the threaded head away from the horizontal shaft, and an anti-loosening nut provided on the side of the screw hole away from the horizontal hole, the anti-loosening nut being threadedly connected to the threaded head. Traditional equipment cams only have continuous contact with a single area of ​​the driven component. After long-term reciprocating rolling, the contact area becomes concave and deformed, the cam's pushing stroke shortens, and the contact pressure between the upper and lower electric heating seats is insufficient, causing incomplete heat sealing and leakage of the shrimp seedling bags. This necessitates replacing the entire cam, resulting in high replacement costs and long downtime for maintenance. This new component, however, uses a wrench to hold a hexahedral rotating threaded head, which drives the horizontal shaft to move horizontally within the transverse hole of the rhomboid part. This changes the contact point between the rolling bearing and the outer ring of the cam, allowing the entire circumference of the cam to participate in contact transmission sequentially, achieving uniform circumferential wear and avoiding single-point wear. Excessive wear and tear on the parts extends the service life of the cam, reducing the cost of purchasing and replacing parts. The threaded head and the threaded hole are adjusted to match. After adjustment, tighten the anti-loosening nut to lock the threaded head. The thread will not loosen on its own under long-term vibration conditions, maintaining the stability of the rolling bearing position and preventing leakage or sealing failure due to sudden changes in the push stroke during operation. The horizontal shaft and the shaft column are arranged in parallel. During the translation process, the rolling bearing always remains parallel and in contact with the outer ring of the cam, preventing the rolling bearing from tilting and wearing on one side. This ensures that the push force is uniform and stable, the heat sealing pressure is consistent throughout, and the shrimp seedling bag seal is of uniform thickness without any breaks or leakage.

[0008] Specifically, each of the two lower support plates has an end plate bolted to its lower end. The end plate is fitted onto the drive shaft and rotatably connected to it. The end plate has a U-shaped structure. By mounting end plates on the lower ends of the two lower support plates, and embedding both ends of the drive shaft into the end plates, a double-pivot rotational support structure is formed. This improves the radial load-bearing capacity of the drive shaft, counteracts the lateral load generated by the cam's operation, and ensures higher coaxiality of the drive shaft rotation, eliminating radial wobble. The cam remains horizontal and in contact with the rolling bearing, resulting in smooth transmission. The end plates are bolted for easy disassembly. After wear on the drive shaft and cam, the end plates can be directly removed to extract the drive shaft, facilitating maintenance and reducing equipment downtime.

[0009] Specifically, a notch is formed at the lower position of one side surface of each of the two lower support plates, a support seat is installed in the notch through bolts, two ends of the shaft column respectively penetrate through the two support seats and are in rolling contact with the support seats, end plates are respectively installed at the two ends of the shaft column through bolts, and two ends of the torsion spring are respectively clamped with the end plates and the support seats. The supporting center position of the shaft column is fixed, and the torque output of the torsion spring is always consistent, which ensures that the opening amplitudes of the upper electric heating seat and the lower electric heating seat after each heat sealing are the same, so that the fry bags can smoothly enter and exit the station without the phenomenon of bag jamming and scratching.

[0010] Specifically, a first clamping groove is formed on the annular side surface of the end plate, a second clamping groove is formed at the bottom of the support seat, and two ends of the torsion spring are respectively clamped in the first clamping groove and the second clamping groove. The two ends of the torsion spring are respectively clamped in the first clamping groove and the second clamping groove to restrain the ends of the torsion spring, so that the torsion spring will not be unhooked during the high-frequency reciprocating swing of the equipment, and can continuously provide stable reset torque.

[0011] Specifically, the cross section of the notch is in a "convex" shape, and the support seat is of a "convex" shape structure. The support seat and the notch are positioned by the convex shape matching, so that the support seat will not slip left and right after being locked by bolts.

[0012] Specifically, two horizontally arranged reinforcing plates are arranged on the lower side of the seat plate, the two reinforcing plates are symmetrically arranged with respect to the side seat, one end of each reinforcing plate is connected with the side seat through bolts, and the reinforcing plates are connected with the two lower support plates through bolts.

[0013] Specifically, an upper heat insulation seat is installed on the upper surface of the upper electric heating seat through bolts, the upper end of the long guide post is connected with the upper heat insulation seat, a lower heat insulation seat is installed on the lower surface of the lower electric heating seat through bolts, and the upper end of the short guide post is connected with the lower heat insulation seat. The upper heat insulation seat isolates the upper electric heating seat from the long guide post, and the lower heat insulation seat isolates the lower electric heating seat from the short guide post. The heat insulation material blocks high-temperature heat conduction, so that the short guide post and the long guide post are always kept at normal temperature without thermal expansion jamming, and slide smoothly, which makes the reciprocating opening and closing actions of the upper electric heating seat and the lower electric heating seat smooth and stable.

[0014] Specifically, the upper surface of the base plate has two first guide holes, in which a first bushing is bolted and installed. The upper surface of the base plate also has two second guide holes, positioned between the two first guide holes. A second bushing is bolted and installed in each of the second guide holes. A long guide post passes through the first bushing, and a short guide post passes through the second bushing. The first and second bushings are pre-installed in the first and second guide holes, respectively. The first and second bushings are made of wear-resistant, high-hardness material, significantly improving wear resistance. The first and second guide holes will not expand or deform with long-term use. The short and long guide posts slide vertically without radial wobble, ensuring permanently stable alignment accuracy of the upper and lower electric heating seats. The first and second bushings are detachably fixed to the first and second guide holes on the base plate with bolts. After wear, the first and second bushings can be replaced individually, eliminating the need to replace the entire heavy base plate and reducing equipment parts replacement costs.

[0015] The beneficial effects of this invention are: Two connecting arms are used to rotatably connect the upper and lower connecting plates to the two ends of the rhomboid part. When the servo motor is working, it drives the cam to rotate through the transmission shaft. The cam and the rolling bearing cooperate with each other to move one end of the rhomboid part upward. At this time, the torsion spring generates torque, and the torsion spring and the cam cooperate with each other to make the rhomboid part oscillate back and forth periodically around the shaft. Then, the long guide column and the short guide column drive the upper electric heating seat and the lower electric heating seat to move, so that the upper electric heating seat and the lower electric heating seat move towards each other synchronously to complete the heat sealing. The opening and closing stroke is shared by the upper electric heating seat and the lower electric heating seat, which shortens the time of a single sealing and cutting action, reduces the interval between two processes, and increases the continuous sealing and cutting capacity of shrimp seedling bags.

[0016] The rolling bearing and the cam work together to reduce wear on the cam surface. By adjusting the position of the threaded head in the threaded hole with a wrench, the position of the horizontal shaft in the horizontal hole changes, so that the rolling bearing first contacts one edge of the cam, while the rest of the cam surface does not contact the rolling bearing. When the contact area between the cam and the rolling bearing is recessed due to rolling, the position of the horizontal shaft in the horizontal hole is adjusted again so that the rolling bearing contacts the unworn area of ​​the cam, achieving uniform wear on the cam, extending the cam's service life, and reducing the cam replacement frequency. Attached Figure Description

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a shrimp seedling bag sealing and leak-proof heat sealing device according to the present invention; Figure 2 This is a perspective view of a shrimp seedling bag sealing and leak-proof heat sealing device according to the present invention; Figure 3 This is another perspective view of a shrimp seedling bag sealing and leak-proof heat sealing device of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the assembly of the upper electric heating seat, lower electric heating seat, servo motor and rhomboid part in the shrimp seedling bag sealing and leak-proof heat sealing device of the present invention. Figure 6 This is an exploded structural diagram of the torsion spring, shaft column, lower support plate, support and rhomboid part in the shrimp seedling bag sealing and leak-proof heat sealing device of the present invention. Figure 7 This is a schematic diagram of the assembly of the drive shaft, shaft column, rolling bearing and rhomboid part in the shrimp seedling bag sealing and leak-proof heat sealing device of the present invention. Figure 8 This is a schematic diagram of the assembly of the drive shaft, shaft column, rolling bearing and diamond-shaped part in a shrimp seedling bag sealing and leak-proof heat sealing device of the present invention from another perspective. In the picture: 100. Seat plate; 101. Side seat; 102. Lower support plate; 1021. Notch; 103. Reinforcing plate; 200. Servo motor; 201. Drive shaft; 2011. End plate; 202. Cam; 300. Rhomboid part; 301. Lower connecting plate; 3011. Connecting arm; 3012. Long guide post; 3013. Upper heat insulation seat; 3014. Upper electric heating seat; 302. Shaft column; 303. Upper connecting plate; 3031. Short guide post; 3032. Lower heat insulation seat; 3033. Lower electric heating seat; 304. Support; 3041. Second locking groove; 305. End plate; 3051. First locking groove; 306. Torsion spring; 400, L-shaped plate; 401, threaded head; 402, anti-loosening nut; 403, rolling bearing; 404, horizontal shaft. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1-8, the present invention provides a technical solution: A shrimp fry bag sealing-cutting and leak-proof heat-sealing device, comprising a base plate 100. Two lower support plates 102 are mounted on the lower surface of the base plate 100, a rhombic part 300 is arranged between the two lower support plates 102, a shaft column 302 fixedly connected to the rhombic part 300 penetrates through the middle position of one surface of the rhombic part 300, a notch 1021 is formed in the lower position of one side surface of each of the two lower support plates 102, a support seat 304 is mounted in the notch 1021 through a bolt, the cross section of the notch 1021 is in a "convex" shape, the support seat 304 is of a "convex" shape structure, two ends of the shaft column 302 respectively penetrate through the two support seats 304 and are in rolling contact with the support seats 304, two ends of the shaft column 302 are each mounted with an end disc 305 through a bolt, a first clamping groove 3051 is formed on the annular side surface of the end disc 305, a second clamping groove 3041 is formed at the bottom of the support seat 304, two ends of a torsion spring 306 are respectively clamped in the first clamping groove 3051 and the second clamping groove 3041, so that two ends of the torsion spring 306 are respectively clamped with the end disc 305 and the support seat 304, that is, the torsion spring 306 is installed between the end of the shaft column 302 and the lower end of the lower support plate 102.

[0020] An upper connecting plate 303 is arranged on the upper side of the rhombic part 300, a lower connecting plate 301 is arranged on the lower side of the rhombic part 300, two ends of the rhombic part 300 are both rotatably connected with connecting arms 3011, the ends of the two connecting arms 3011 far away from the rhombic part 300 are respectively rotatably connected with the upper connecting plate 303 and the lower connecting plate 301, two ends of the upper connecting plate 303 are both mounted with short guide posts 3031, two ends of the lower connecting plate 301 are both mounted with long guide posts 3012, the upper surface of the base plate 100 is provided with two first guide holes, a first shaft sleeve is mounted in the first guide hole through a bolt, the upper surface of the base plate 100 is provided with two second guide holes, the two second guide holes are arranged between the two first guide holes, a second shaft sleeve is mounted in the second guide hole through a bolt, so that the long guide post 3012 penetrates through the first shaft sleeve, and the short guide post 3031 penetrates through the second shaft sleeve, realizing that both the short guide post 3031 and the long guide post 3012 penetrate through the base plate 100 and are in sliding contact with the base plate 100.

[0021] An upper heat insulation seat 3013 is bolted to the upper surface of the upper electric heating seat 3014. The upper end of the long guide post 3012 is connected to the upper heat insulation seat 3013. A lower heat insulation seat 3032 is bolted to the lower surface of the lower electric heating seat 3033. The upper end of the short guide post 3031 is connected to the lower heat insulation seat 3032. This allows the upper electric heating seat 3014 to be installed between the upper ends of the two long guide posts 3012, and the lower electric heating seat 3033 to be installed between the upper ends of the two short guide posts 3031. 14 works in conjunction with the lower electric heating seat 3033 to heat seal the shrimp seedling bag. The upper heat insulation seat 3013 isolates the upper electric heating seat 3014 from the long guide column 3012, and the lower heat insulation seat 3032 isolates the lower electric heating seat 3033 from the short guide column 3031. The heat insulation material blocks the conduction of high temperature heat. The short guide column 3031 and the long guide column 3012 always maintain a normal temperature state, without thermal expansion and jamming, and slide smoothly, so that the reciprocating opening and closing action of the upper electric heating seat 3014 and the lower electric heating seat 3033 is smooth and stable.

[0022] A side seat 101 is installed on one side of the lower surface of the seat plate 100. Two horizontally arranged reinforcing plates 103 are provided on the lower side of the seat plate 100. The two reinforcing plates 103 are symmetrically arranged about the side seat 101. One end of the reinforcing plate 103 is connected to the side seat 101 by bolts. The reinforcing plate 103 is connected to two lower support plates 102 by bolts. The side seat 101 and the lower support plates 102 are connected by the reinforcing plates 103 to improve the stability of the structure.

[0023] A servo motor 200 is mounted on the side of the side seat 101 opposite to the lower support plate 102. A drive shaft 201 is mounted on the output shaft of the servo motor 200. End plates 2011 are bolted to the lower ends of both lower support plates 102. The end plates 2011 are sleeved on the drive shaft 201 and rotatably connected to it. The end plates 2011 have a "U"-shaped structure, providing linear support to the drive shaft 201 and improving structural stability. A cam 202 is sleeved on the drive shaft 201 and fixed to it. A rolling bearing 403 is located on the upper side of the cam 202. Two connecting arms 3011 are used to rotatably connect the upper connecting plate 303 and the lower connecting plate 301 to the two ends of the rhomboid part 300, respectively. The servo motor 200 then operates. The transmission shaft 201 drives the cam 202 to rotate. The cam 202 cooperates with the rolling bearing 403 to move one end of the rhomboid part 300 upward. At this time, the torsion spring 306 generates torque, so the torsion spring 306 cooperates with the cam 202 to make the rhomboid part 300 oscillate back and forth periodically around the shaft 302. Then, the long guide column 3012 and the short guide column 3031 respectively drive the upper electric heating seat 3014 and the lower electric heating seat 3033 to move, so that the upper electric heating seat 3014 and the lower electric heating seat 3033 move closer to each other to complete the heat sealing. The opening and closing stroke is shared by the upper electric heating seat 3014 and the lower electric heating seat 3033, which shortens the time of a single sealing and cutting action, reduces the interval between two processes, and improves the continuous sealing and cutting capacity of shrimp seedling bags.

[0024] A horizontal hole is provided at one end of the rhomboid part 300, and a horizontal shaft 404 is inserted into the horizontal hole. The horizontal shaft 404 is arranged parallel to the shaft column 302. A rolling bearing 403 is installed at one end of the horizontal shaft 404. A threaded head 401 is installed at the end of the horizontal shaft 404 away from the rolling bearing 403. An L-shaped plate 400 is provided on the side of the horizontal hole away from the rolling bearing 403. One end of the L-shaped plate 400 is connected and fixed to the rhomboid part 300. A screw hole is provided on the side of the L-shaped plate 400 facing the horizontal hole. The screw hole is arranged concentrically with the horizontal hole. The threaded head 401 is threaded into the screw hole. A hexahedron for locking a wrench is installed at the end of the threaded head 401 away from the horizontal shaft 404. An anti-loosening nut 402 is provided on the side of the screw hole away from the horizontal hole. The anti-loosening nut 402 is connected to the screw hole. The threaded head 401 is connected to the rolling bearing 403, which cooperates with the cam 202 to reduce wear on the surface of the cam 202. By adjusting the position of the threaded head 401 in the threaded hole with a wrench, the position of the horizontal shaft 404 in the horizontal hole changes, so that the rolling bearing 403 first contacts one edge of the cam 202, while the rest of the surface of the cam 202 does not contact the rolling bearing 403. When the contact area between the cam 202 and the rolling bearing 403 is recessed due to rolling, the position of the horizontal shaft 404 in the horizontal hole is adjusted again so that the rolling bearing 403 contacts the unworn area of ​​the cam 202, achieving uniform wear on the cam 202, extending the service life of the cam 202, and reducing the replacement frequency of the cam 202.

[0025] 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 device for sealing and leak-proof heat sealing of shrimp seedling bags, comprising a base plate (100), characterized in that: Two lower support plates (102) are installed on the lower surface of the seat plate (100). A rhomboid portion (300) is provided between the two lower support plates (102). A shaft column (302) connected and fixed to the rhomboid portion (300) is passed through the middle of one side of the rhomboid portion (300). A torsion spring (306) is installed between the end of the shaft column (302) and the lower end of the lower support plate (102). An upper connecting plate (303) is provided on the upper side of the rhomboid portion (300), and a lower connecting plate (301) is provided on the lower side of the rhomboid portion (300). Connecting arms (3011) are rotatably connected to both ends of the rhomboid portion (300). The ends of the two connecting arms (3011) away from the rhomboid portion (300) are rotatably connected to the upper connecting plate (303) and the lower connecting plate (301), respectively. Both ends of the lower connecting plate (301) are equipped with short guide columns (3031), and both ends of the lower connecting plate (301) are equipped with long guide columns (3012). The short guide columns (3031) and long guide columns (3012) penetrate the seat plate (100) and slide in contact with the seat plate (100). An upper electric heating seat (3014) is installed between the upper ends of the two long guide columns (3012), and a lower electric heating seat (3033) is installed between the upper ends of the two short guide columns (3031). The upper electric heating seat (3014) and the lower electric heating seat (3033) cooperate with each other to heat seal the shrimp seedling bag. A power component is installed on the lower surface of the seat plate (100) to cooperate with the torsion spring (306) to switch the lower electric heating seat (3033) and the upper electric heating seat (3014) between closing and opening.

2. The shrimp seedling bag sealing and leak-proof heat-sealing device according to claim 1, characterized in that: The power component includes a servo motor (200), a side seat (101) is installed on one side of the lower surface of the base plate (100), the servo motor (200) is installed on the side of the side seat (101) away from the lower support plate (102), a transmission shaft (201) is installed on the output shaft of the servo motor (200), a cam (202) is sleeved on the transmission shaft (201) and fixed to the transmission shaft (201), a rolling bearing (403) is provided on the upper side of the cam (202), and the rolling bearing (403) is connected to the rhomboid part (300) through an adjustment component.

3. The shrimp seedling bag sealing and leak-proof heat sealing device according to claim 2, characterized in that: The adjustment assembly includes a horizontal shaft (404). A horizontal hole is provided at one end of the rhomboid portion (300), and the horizontal shaft (404) is inserted into the horizontal hole. The horizontal shaft (404) is arranged parallel to the shaft column (302). A rolling bearing (403) is installed at one end of the horizontal shaft (404). A threaded head (401) is installed at the end of the horizontal shaft (404) away from the rolling bearing (403). An L-shaped plate (400) is provided on the side of the horizontal hole away from the rolling bearing (403). One end of the L-shaped plate (400) is connected and fixed to the rhomboid part (300). The L-shaped plate (400) has a screw hole on the side facing the horizontal hole. The screw hole is arranged concentrically with the horizontal hole. The threaded head (401) is threaded into the screw hole. A hexahedron for locking the wrench is installed on the end of the threaded head (401) away from the horizontal axis (404). A lock nut (402) is provided on the side of the screw hole away from the horizontal hole. The lock nut (402) is threaded to the threaded head (401).

4. The shrimp seedling bag sealing and leak-proof heat-sealing device according to claim 2, characterized in that: Both of the lower support plates (102) are bolted to end plates (2011). The end plates (2011) are sleeved on the drive shaft (201) and rotatably connected to the drive shaft (201). The end plates (2011) have a "U" shaped structure.

5. The shrimp seedling bag sealing and leak-proof heat-sealing device according to claim 2, characterized in that: Both of the lower support plates (102) have notches (1021) on the lower part of one side. Supports (304) are installed in the notches (1021) by bolts. The two ends of the shaft (302) pass through the two supports (304) respectively and roll in contact with the supports (304). The two ends of the shaft (302) are installed with end plates (305) by bolts. The two ends of the torsion spring (306) are respectively engaged with the end plates (305) and the supports (304).

6. The shrimp seedling bag sealing and leak-proof heat-sealing device according to claim 5, characterized in that: The end plate (305) has a first snap-fit ​​groove (3051) on its annular side, and the support (304) has a second snap-fit ​​groove (3041) at its bottom. The two ends of the torsion spring (306) are respectively snapped into the first snap-fit ​​groove (3051) and the second snap-fit ​​groove (3041).

7. The shrimp seedling bag sealing and leak-proof heat-sealing device according to claim 6, characterized in that: The cross-section of the notch (1021) is convex, and the support (304) is convex.

8. The shrimp seedling bag sealing and leak-proof heat sealing device according to claim 2, characterized in that: The seat plate (100) has two horizontally arranged reinforcing plates (103) on its lower side. The two reinforcing plates (103) are symmetrically arranged about the side seat (101). One end of the reinforcing plate (103) is connected to the side seat (101) by bolts, and the reinforcing plate (103) is connected to two lower support plates (102) by bolts.

9. The shrimp larvae bag sealing and leak-proof heat sealing device according to claim 1, characterized in that: The upper surface of the upper electric heating seat (3014) is bolted with an upper heat insulation seat (3013), the upper end of the long guide column (3012) is connected to the upper heat insulation seat (3013), the lower surface of the lower electric heating seat (3033) is bolted with a lower heat insulation seat (3032), and the upper end of the short guide column (3031) is connected to the lower heat insulation seat (3032).

10. The shrimp seedling bag sealing and leak-proof heat-sealing device according to claim 9, characterized in that: The upper surface of the seat plate (100) has two first guide holes, and a first bushing is installed in the first guide hole by bolts. The upper surface of the seat plate (100) has two second guide holes, which are arranged between the two first guide holes. A second bushing is installed in the second guide hole by bolts. The long guide post (3012) passes through the first bushing, and the short guide post (3031) passes through the second bushing.

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