Leiocassis longirostris hatching device
By designing the incubation ponds of multiple matrix discharge, combined with the trace traveled simulation mechanism and cleaning agency, the problem of poor water quality and cleaning difficulties during the fish egg incubation process has been solved, and efficient fish fry fishing and water recycling are achieved, and the incubation has been improved. Rate and water quality management efficiency.
Patent Information
- Application Number
- CN202411614008.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-01-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing fish hatching technology, the water quality of the fish eggs deteriorates, the incubation pond is difficult to clean, and the fish fry fish fish fish fishing efficiency is low, resulting in the difficulty of hatching rate and water quality management.
A catfish incubation device is designed, including the incubation pool with multiple matrix stations. Each incubation pool is set up with a tracey -travel simulation mechanism and cleaning mechanism. The trace traveler simulation mechanism simulates natural water flow through the driving rod and tracer dialing board, increasing the amount of dissolved oxygen; the cleaning mechanism can be automated and cleaned through the frame sleeve and brushes.
The comprehensive automated brush and cleaning of the incubation pool is achieved, avoiding the deterioration of water quality, and increasing fish egg incubation rates. At the same time, through the tilt structure and drainage system, it is convenient for fish fry collection and water recycling, and reduced artificial labor intensity.
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Figure CN119325927A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fish fry hatching, and in particular relates to a catfish hatching device. Background Art
[0002] Catfish is a freshwater fish that is loved by many people for its tender meat and delicious taste. It is one of the important economic fish.
[0003] Catfish usually spawn from spring to early summer. During the incubation of catfish eggs, proper water flow is very important because water flow can increase the dissolved oxygen content in the water and provide a large amount of oxygen for the metabolic activities of the eggs during the incubation process. At the same time, moderate water flow can help keep the eggs dispersed and avoid adhesion; during the incubation period, some metabolic products and other wastes may accumulate around the eggs. Water flow helps to remove these wastes and keep the water clean, thereby reducing the occurrence of diseases.
[0004] In order to improve the hatching rate, the current catfish egg hatching mainly adopts artificial indoor hatching. By building an indoor hatching pool, the environmental temperature can be easily controlled. In order to simulate the hatching of fish eggs in the natural environment, the fan blades are driven by a motor to blow the water inside the hatching pool to increase the dissolved oxygen content of the pool water and ensure the hatching rate of catfish fry. However, since the hatching basket is hoisted on the hatching pool, some metabolic wastes will be generated during the hatching process of the fish eggs. The accumulation of metabolic wastes will cause the water quality to deteriorate and affect the hatching rate of the fish eggs. Therefore, after each batch of fish eggs is hatched, the hatching pool needs to be scrubbed and cleaned, and the inside of the hatching pool needs to be cleaned. The water in the hatching pool needs to be replaced; currently, brushing and cleaning the inside of the hatching pool mainly relies on manual cleaning; the suspended hatching basket needs to be moved before cleaning; overall brushing and cleaning is time-consuming and laborious, and the location in the middle of the hatching pool is not convenient for operators to perform brushing operations; at the same time, after the fish eggs are hatched into fry, the fry will pass through the hatching basket and swim into the hatching pool, and the fry in the hatching pool are not convenient for manual collection at a later stage. Although the fry will gather at a certain position in the hatching pool, during the process of catching the fry, the fry will swim freely in the hatching pool, and usually it takes multiple times to catch them completely.
[0005] Therefore, in order to improve the catching efficiency of fry in the hatching pond and reduce the labor intensity of manually cleaning the hatching pond, the present invention provides a catfish hatching device. Summary of the invention
[0006] In view of the above problems, an embodiment of the present application provides a catfish hatching device to improve the efficiency of catching fry inside a hatching pond, while reducing the labor intensity of manually cleaning the hatching pond.
[0007] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: the present invention provides a catfish hatching device, comprising a plurality of hatching pools arranged in a matrix on the indoor floor, each hatching pool is provided with an upstream swimming simulation mechanism, the upstream swimming simulation mechanisms on each vertical row of hatching pools in the front and rear directions are connected to each other, and a No. 1 drainage ditch with a higher right and a lower left is excavated on the front side of the ground of each horizontal row of hatching pools in the left and right directions; a No. 2 drainage ditch with a higher back and a lower front is also excavated on the left side of the ground of the hatching pools in the leftmost vertical row, and a plurality of No. 1 drainage ditches are connected to the No. 2 drainage ditch; a cleaning mechanism is provided inside each hatching pool, and the cleaning mechanism and the upstream swimming simulation mechanism cooperate with each other; the The upstream swimming simulation mechanism includes a driving rod rotatably installed on the upper end surfaces of the front and rear side walls of the incubation pool through ear seats and bearings, and an upstream swimming dial is fixedly arranged in the middle of the driving rod; the cleaning mechanism includes a frame-type plate sleeve arranged inside the incubation pool; the lower end outer walls of the front and rear sides of the frame-type plate sleeve are respectively hinged with connecting rods, and the lower ends of the connecting rods are respectively hinged with lower brush plates, and the two lower brush plates are respectively slidably arranged on the bottom inner wall of the incubation pool; the side walls of the lower brush plate and the side walls of the frame-type plate sleeve are both detachably provided with brushes that fit the inner wall of the incubation pool; the upper end of the frame-type plate sleeve is also symmetrically provided with two racks; the driving rod is provided with two active components that respectively mesh with the racks one by one.
[0008] According to a favorable embodiment, the active component includes a push rod evenly arranged along the circumferential outer wall of the driving rod by a sliding fit, and a ball is arranged at one end of the push rod away from the axis of the driving rod; an incomplete external tooth ring is also movably arranged on the outer side of the driving rod corresponding to the push rod, and the inner wall of the incomplete external tooth ring is evenly provided with an arc groove matching the push rod; one end of the arc groove is a right-angle structure, and the other end is an arc surface structure fitting with the ball; the incomplete external tooth ring is meshed with the rack.
[0009] According to a favorable embodiment, a No. 3 ditch is excavated in front of the frontmost horizontal row of hatching pools, and the No. 3 ditch is divided into three parts from left to right: a sewage area, a purification area and a clean water area. A water pump is arranged on the ground, and the water inlet of the water pump is connected to the inside of the clean water area. A water injection system is arranged on all the hatching pools, and the water outlet of the water pump is connected to the water injection system.
[0010] According to a favorable embodiment, a driving motor is arranged at the rear side of each hatching pool in the rearmost horizontal row, and the output shaft of the driving motor is connected to the upstream swimming simulation mechanism at the adjacent position through a reducer.
[0011] According to a favorable embodiment, a limit groove is provided on the inner wall of the incubation pool, a limit rod is arranged inside the limit groove, a limit spring is sleeved on the outer wall of the limit rod, and the frame-type plate sleeve is slidably arranged on the outer wall of the limit rod; the lower end of the limit spring is connected to the inner wall of the limit groove, and the upper end of the limit spring is connected to the outer wall of the lower end of the frame-type plate sleeve.
[0012] According to an advantageous embodiment, a protective cover is rotatably provided on the outer side of the middle portion of the driving rod and sleeved on the outer side of the upstream paddle. The protective cover is fixedly provided at the middle position of the upper end surface of the hatching tank.
[0013] According to a favorable embodiment, two groups of fixing rods are clamped on the hatching pool, and the number of fixing rods on each group is two and they are arranged in parallel; two hatching baskets are movably clamped together on each group of fixing rods; and mesh holes are evenly arranged on the hatching baskets.
[0014] According to an advantageous embodiment, the bottom end surface of the hatching pool is a structure with a low front and a high rear; a front end side wall of the hatching pool is provided with a drainage pipe connected to the interior, and a valve is provided on the drainage pipe.
[0015] According to a favorable embodiment, one end of the driving rod is rectangular, and the sliding sleeve at the other end is provided with a connecting sleeve, the interior of the connecting sleeve is a rectangular cavity structure; two adjacent driving rods are connected by the connecting sleeve; the output shaft of the driving motor is connected to the end of one of the driving rods after connecting the reducer.
[0016] Compared with the prior art, the catfish hatching device provided by the embodiment of the present invention has the following beneficial effects:
[0017] 1. In the process of reversing the driving motor in the present invention, the active component can be indirectly driven to drive the rack to move, thereby indirectly controlling the movement of the brush, and further performing all-round automatic brushing and cleaning on the inner walls and bottom wall around the hatching pool, fully ensuring the cleanliness of the hatching pool, and effectively avoiding the problem of water quality deterioration caused by the accumulation of metabolic waste during the hatching process of fish eggs, which affects the hatching rate of fish eggs.
[0018] 2. The bottom of the hatching pond provided in the present invention is an inclined structure, which is convenient for the hatched fry to be discharged through the drainage pipe for centralized collection along with the pond water. The discharged sewage can be converged to the No. 2 drainage ditch along the No. 1 drainage ditch and finally concentrated in the No. 3 ditch for purification and recycling, thereby saving water resources.
[0019] 3. In the present invention, the forward rotation of the driving motor indirectly drives the upstream paddle to fluctuate the water inside the hatching pool, and cooperates with the reducer to control the passive frequency of the upstream paddle, thereby increasing the dissolved oxygen content of the water in the hatching pool. At the same time, since the hatching basket is movably connected to the limit rod, the fluctuation of the water in the pool can further drive the hatching basket to shake at a certain frequency, thereby keeping the fish eggs dispersed and avoiding adhesion, effectively improving the hatching effect of the fish eggs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a three-dimensional structural diagram of the present invention from a first viewing angle (the mesh of the hatching basket is not shown in the figure).
[0021] Figure 2 This is a three-dimensional structural diagram of the present invention from a second viewing angle (the hatching basket mesh is not shown in the figure).
[0022] Figure 3 Schematic diagram of the structure inside a single hatching pool of the present invention (the hatching basket mesh is not shown in the figure).
[0023] Figure 4 The present invention Figure 3 A cross-sectional view of the first position.
[0024] Figure 5 The present invention Figure 3 A cross-sectional view of a second position.
[0025] Figure 6 It is a cross-sectional view between the active component and the driving rod of the present invention.
[0026] Figure 7 It is a structural schematic diagram of a hatching basket of the present invention.
[0027] The reference numerals in the figure are: 1. hatching pool; 2. upstream swimming simulation mechanism; 3. drainage ditch No. 1; 4. drainage ditch No. 2; 5. cleaning mechanism; 6. driving motor; 7. reducer; 11. fixing rod; 12. hatching basket; 13. drainage pipe; 21. driving rod; 211. connecting kit; 22. upstream swimming dial plate; 23. protective cover; 51. frame plate sleeve; 52. limiting rod; 53. limiting spring; 54. connecting rod; 55. lower brush plate; 56. brush; 57. rack; 58. active component; 581. top pressure rod; 582. incomplete outer gear ring; 583. arc groove; 8. ditch No. 3; 81. sewage area; 82. purification area; 83. clean water area; 84. water pump; 85. water injection system. DETAILED DESCRIPTION
[0028] The following is combined with Figure 1-7 This application is further described in detail.
[0029] Please refer to Figure 1 and Figure 2A catfish hatching device comprises a plurality of hatching pools 1 arranged in a matrix on the indoor floor, each hatching pool 1 is provided with an upstream swimming simulation mechanism 2, the upstream swimming simulation mechanisms 2 on each vertical row of hatching pools 1 in the front and rear directions are connected to each other, and a No. 1 drainage ditch 3 with a higher right and a lower left is excavated on the front ground of each horizontal row of hatching pools 1 in the left and right directions; the No. 1 drainage ditch 3 with a higher right and a lower left is convenient for the centralized collection of wastewater discharged from the hatching pools 1; a No. 2 drainage ditch 4 with a higher back and a lower front is also excavated on the left ground of the hatching pools 1 in the leftmost vertical row, and a plurality of No. 1 drainage ditches 3 are connected with the No. 2 drainage ditch 4; a cleaning mechanism 5 is provided inside each hatching pool 1, and the cleaning mechanism 5 and the upstream swimming simulation mechanism 2 cooperate with each other, and a driving motor 6 is provided on the rear side of each hatching pool 1 in the last horizontal row, and the output shaft of the driving motor 6 is connected to the upstream swimming simulation mechanism 2 at an adjacent position through a reducer 7.
[0030] Continue reading Figure 1 and Figure 2 A No. 3 ditch 8 is excavated on the front side of the frontmost horizontal row of hatching pools 1. The No. 3 ditch 8 is divided into three parts from left to right: a sewage area 81, a purification area 82 and a clean water area 83. The setting of the No. 3 ditch 8 is convenient for filtering and purifying the centrally collected wastewater for secondary utilization. A water pump 84 is arranged on the ground, and the water inlet of the water pump 84 is connected to the inside of the clean water area 83. All the hatching pools 1 are also provided with a water injection system 85, and the water outlet of the water pump 84 is connected to the water injection system 85.
[0031] See also Figure 3 and Figure 7 The hatching pool 1 is provided with two groups of fixed rods 11, each group of fixed rods 11 has two fixed rods 11 and they are arranged in parallel; each group of fixed rods 11 is provided with two hatching baskets 12 which are movably connected together; mesh holes are evenly arranged on the hatching baskets 12; by movably connecting the hatching baskets 12, the hatching baskets 12 can be driven to move when the pool water fluctuates, which effectively avoids the adhesion of fish eggs inside the hatching baskets 12, and at the same time, it is convenient for the staff to disassemble and assemble the hatching baskets 12.
[0032] See also Figure 3 and Figure 4 The upstream swimming simulation mechanism 2 includes a driving rod 21 rotatably mounted on the upper end surfaces of the front and rear side walls of the hatching pool 1 through ear seats and bearings, and an upstream swimming dial 22 is fixedly arranged in the middle of the driving rod 21; a protective cover 23 is rotatably arranged on the outer side of the middle part of the driving rod 21 and is sleeved on the outer side of the upstream swimming dial 22, and the protective cover 23 is fixedly arranged in the middle position of the upper end surface of the hatching pool 1; the protective cover 23 can prevent people from accidentally touching and causing injuries during the rotation of the upstream swimming dial 22; the upstream swimming dial 22 is used to fluctuate the pool water at a specified frequency, thereby simulating the frequency of the pectoral fin flapping of male fish in a natural state, and more effectively ensuring the hatching effect of catfish eggs.
[0033] See also Figure 3 and Figure 5 The cleaning mechanism 5 includes a frame-type plate sleeve 51 arranged inside the incubation pool 1; a limiting groove is provided on the inner wall of the incubation pool 1, a limiting rod 52 is arranged inside the limiting groove, a limiting spring 53 is sleeved on the outer wall of the limiting rod 52, and the frame-type plate sleeve 51 is slidably arranged on the outer wall of the limiting rod 52; the lower end of the limiting spring 53 is connected to the inner wall of the limiting groove, and the upper end of the limiting spring 53 is connected to the outer wall of the lower end of the frame-type plate sleeve 51.
[0034] See also Figure 5 The outer walls of the lower ends of the front and rear sides of the frame-type plate cover 51 are respectively hinged with connecting rods 54, and the lower ends of the connecting rods 54 are respectively hinged with lower brush plates 55. The two lower brush plates 55 are respectively slidably arranged on the inner wall of the bottom end of the hatching pool 1; the side walls of the lower brush plates 55 and the side walls of the frame-type plate cover 51 are both detachably provided with brushes 56 that fit the inner wall of the hatching pool 1; it is convenient to regularly replace the brushes 56 to ensure the refreshing effect.
[0035] Continue reading Figure 5 Two racks 57 are symmetrically arranged on the upper end of the frame plate sleeve 51; and two active components 58 are arranged on the driving rod 21, which are respectively engaged with the racks 57 one by one.
[0036] See also Figure 5 and Figure 6 The active component 58 includes a push rod 581 that is evenly arranged along the outer wall of the circumference of the driving rod 21 by a sliding fit, and a ball is arranged at one end of the push rod 581 away from the axis of the driving rod 21; an incomplete outer tooth ring 582 is also movably arranged on the outer side of the driving rod 21 corresponding to the push rod 581, and an arc groove 583 that matches the push rod 581 is evenly opened on the inner wall of the incomplete outer tooth ring 582; one end of the arc groove 583 is a right-angle structure, and the other end is an arc surface structure that fits the ball; the incomplete outer tooth ring 582 is meshed with the rack 57; when the driving motor 6 is reversed, it can drive the driving rod 21 to reverse, and at the same time, the driving rod 21 drives the push rod 581 to reverse, and the push rod 581 is driven by the driving motor 6. During the flipping process of the rod 581, due to the limitation of the right-angle end of the arc groove 583, the incomplete outer tooth ring 582 will be synchronously driven to rotate. The rotation of the incomplete outer tooth ring 582 drives the rack 57 to move downward, thereby driving the side frame plate sleeve 51 of the hatching pool 1 to move downward. At the same time, the two lower brush plates 55 are brought close to each other through the connecting rods 54 on both sides. When the frame plate sleeve 51 moves downward, the limit spring 53 is compressed; thereby completing the brushing of the inner wall of the hatching pool 1. When the incomplete outer tooth ring 582 is disengaged from the rack 57 during its rotation, the frame plate sleeve 51 is driven to move upward and the two lower brush plates 55 are moved away from each other through the reset effect of the limit spring 53. The above operation is repeated, and the inner wall of the hatching pool 1 is fully cleaned by the brush 56.
[0037] See also Figure 5 The bottom end surface of the hatching pool 1 is a low front and high rear structure; the front end side wall of the hatching pool 1 is provided with a drainage pipe 13 connected to the interior, and a valve is provided on the drainage pipe 13; the water source inside the hatching pool 1 can be controlled to be discharged by opening the valve, and the fry after hatching can also be discharged through the drainage pipe 13 for collection; the low front and high rear structure of the hatching pool 1 facilitates the complete drainage of the internal water flow.
[0038] See also Figure 1 and Figure 5 One end of the driving rod 21 is rectangular, and the other end is slidably sleeved with a connecting sleeve 211, the interior of the connecting sleeve 211 is a rectangular cavity structure; two adjacent driving rods 21 are connected by the connecting sleeve 211; the output shaft of the driving motor 6 is connected to the end of one of the driving rods 21 after connecting the reducer 7.
[0039] When connecting a longitudinal row of driving rods 21 in the front-to-back direction, it can be quickly realized through the connection kit 211, and the driving rods 21 at corresponding positions can be selected for linkage according to the specific number of incubation pools 1 used. The set connection kit 211 is not only convenient for disassembly and assembly, but also saves energy consumption of the driving motor 6.
[0040] When specifically hatching catfish eggs, the indoor temperature is controlled to be 26 to 30 degrees Celsius, and at the same time, a proper amount of water is injected into the hatching pool 1 through the water injection system 85, and the upstream swimming simulation mechanism 2 is driven to rotate by the driving motor 6, and the rotation is maintained at 31 revolutions per minute, and then the eggs discharged by the catfish are placed in the hatching basket 12. After about five days, the fish eggs can be hatched. After the hatching is completed, the driving motor 6 is stopped, and the valve is opened to discharge the fry hatched in the hatching pool 1 from the drain pipe 13 along with the pool water, and the fry are collected at the end of the drain pipe 13; after completion, the driving motor 6 is started to flip, and the brush 56 is driven to move by the active component 58 in cooperation with the rack 57 to complete the cleaning of the inner wall of the hatching pool 1.
[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A catfish hatching device, characterized in that: The invention comprises a plurality of hatching pools (1) arranged in a matrix on the indoor floor, each hatching pool (1) is provided with an upstream swimming simulation mechanism (2), the upstream swimming simulation mechanisms (2) on each vertical row of hatching pools (1) in the front and rear directions are connected to each other, and a No. 1 drainage ditch (3) with a higher right side and a lower left side is excavated on the front side of the hatching pools (1) in the left and right directions; a No. 2 drainage ditch (4) with a higher back side and a lower front side is excavated on the left side of the hatching pools (1) in the leftmost vertical row, and a plurality of No. 1 drainage ditches (3) are connected to the No. 2 drainage ditch (4); a cleaning mechanism (5) is provided inside each hatching pool (1), and the cleaning mechanism (5) and the upstream swimming simulation mechanism (2) cooperate with each other; The upstream swimming simulation mechanism (2) comprises a driving rod (21) rotatably mounted on the upper end surfaces of the front and rear side walls of the hatching pool (1) through ear seats and matching bearings, and a upstream swimming dial plate (22) is fixedly arranged in the middle of the driving rod (21); The cleaning mechanism (5) comprises a frame-shaped plate sleeve (51) arranged inside the hatching pool (1); the outer walls of the lower ends of the front and rear sides of the frame-shaped plate sleeve (51) are respectively hingedly provided with connecting rods (54), and the lower ends of the connecting rods (54) are respectively hingedly provided with lower brush plates (55), and the two lower brush plates (55) are respectively slidably arranged on the inner wall of the bottom end of the hatching pool (1); the side walls of the lower brush plates (55) and the side walls of the frame-shaped plate sleeve (51) are both detachably provided with brushes (56) that fit the inner wall of the hatching pool (1); The upper end of the frame plate sleeve (51) is symmetrically provided with two racks (57); the driving rod (21) is provided with two active components (58) respectively meshing with the racks (57) one by one.
2. A catfish hatching device according to claim 1, characterized in that: The active component (58) includes a push rod (581) uniformly arranged along the outer wall of the circumference of the driving rod (21) by sliding cooperation, and a ball is arranged at one end of the push rod (581) away from the axis of the driving rod (21); an incomplete outer tooth ring (582) is movably arranged on the outer side of the driving rod (21) corresponding to the push rod (581), and the inner wall of the incomplete outer tooth ring (582) is uniformly provided with an arc groove (583) matching with the push rod (581); one end of the arc groove (583) is a right-angle structure, and the other end is a curved surface structure that fits with the ball; the incomplete outer tooth ring (582) is meshed with the rack (57).
3. A catfish hatching device according to claim 1, characterized in that: A No. 3 ditch (8) is excavated at the front side of the hatching pools (1) in the frontmost horizontal row. The No. 3 ditch (8) is divided from left to right into three parts: a sewage area (81), a purification area (82) and a clean water area (83). A water pump (84) is arranged on the ground. The water inlet of the water pump (84) is connected to the inside of the clean water area (83). A water injection system (85) is arranged on all the hatching pools (1). The water outlet of the water pump (84) is connected to the water injection system (85).
4. A catfish hatching device according to claim 1, characterized in that: A driving motor (6) is arranged at the rear side of each hatching pool (1) in the rearmost horizontal row, and the output shaft of the driving motor (6) is connected to the upstream swimming simulation mechanism (2) at an adjacent position via a reducer (7).
5. A catfish hatching device according to claim 1, characterized in that: The inner wall of the incubation pool (1) is provided with a limit groove, a limit rod (52) is arranged inside the limit groove, the outer wall of the limit rod (52) is sleeved with a limit spring (53), and the frame plate sleeve (51) is slidably arranged on the outer wall of the limit rod (52); the lower end of the limit spring (53) is connected to the inner wall of the limit groove, and the upper end of the limit spring (53) is connected to the outer wall of the lower end of the frame plate sleeve (51).
6. A catfish hatching device according to claim 1, characterized in that: A protective cover (23) is rotatably provided on the outer side of the middle of the driving rod (21) and is sleeved on the outer side of the upstream dial plate (22). The protective cover (23) is fixedly provided at the middle position of the upper end surface of the hatching pool (1).
7. A catfish hatching device according to claim 1, characterized in that: The hatching pool (1) is provided with two groups of fixed rods (11) in a clamping connection, and each group of fixed rods (11) has two fixed rods (11) arranged in parallel; each group of fixed rods (11) is provided with two hatching baskets (12) in a mutually movable clamping connection; and mesh holes are evenly arranged on the hatching baskets (12).
8. A catfish hatching device according to claim 1, characterized in that: The bottom end surface of the hatching pool (1) is a structure with a low front and a high rear. The front end side wall of the hatching pool (1) is provided with a drainage pipe (13) communicating with the interior, and a valve is provided on the drainage pipe (13).
9. A catfish hatching device according to claim 4, characterized in that: One end of the driving rod (21) is rectangular, and the other end is slidably sleeved with a connecting sleeve (211), the interior of the connecting sleeve (211) is a rectangular cavity structure; two adjacent driving rods (21) are connected via the connecting sleeve (211); and the output shaft of the driving motor (6) is connected to the end of one of the driving rods (21) via a connecting reducer (7).