A water pollution detection device for rivers

Abstract

The application relates to the technical field of water pollution detection, in particular to a water pollution detection device for rivers. The device comprises a base plate, the bottom of a groove of the base plate is fixedly connected with a sliding rail, the top of the sliding rail is slidably connected with a sliding plate, one side of the bottom of the sliding plate is fixedly connected with a sample storage assembly. Through the arrangement of the sliding rail, a driving motor, a first gear, a second gear and a lifting assembly, the infusion assembly can move up and down and left and right, then the infusion assembly can be put into the river according to the requirement of a user, then the river water in the river can be transmitted into the inside of a liquid storage tank by cooperating with an infusion pump included in the infusion assembly, finally the pollution degree of the river water can be detected by cooperating with a liquid detector. The detection method can prevent the deposition in the river from covering the detection equipment, thereby causing the detection equipment to have a delayed reaction, and can also prevent the flowing river water from causing impact damage to the detection equipment.

Description

Technical Field

[0001] This invention relates to the field of water pollution detection technology, and more particularly to a water pollution detection device for rivers. Background Technology

[0002] Rivers are habitats for many organisms, and water pollution can affect the survival of aquatic life and the balance of the ecosystem. Many people rely on river water as a source of drinking water or agricultural irrigation. Therefore, it is usually necessary to use water pollution detection devices to test the water quality of rivers.

[0003] For example, the prior art patent document with publication number CN218382710U provides a river water pollution detection device. It mainly involves setting up a support mechanism on the riverbank, aligning the sensor with the water surface, turning on the servo motor, which drives the worm gear to rotate, causing the worm wheel to rotate, which in turn drives the threaded rod to rotate, thereby causing the second threaded rod to move up and down. Then, the servo motor controls the downward movement of the second threaded rod to control the sensor to enter the water surface. This frees up manual labor and eliminates the need for workers to come into contact with sewage, thus protecting health.

[0004] However, the device still has the following problems: the river water inside the river moves, so during the process of the sensor detecting the river, the river water will impact the sensor, which may cause damage to the sensor. In addition, the sediment inside the river water will also move with the river water, which may cause the sediment to cover the sensor, thus affecting the sensor's detection function, resulting in misreading or delayed response, thereby affecting the detection quality of the equipment.

[0005] Therefore, a water pollution detection device for rivers is proposed to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the background art by proposing a water pollution detection device for rivers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a water pollution detection device for rivers, comprising a base plate, a slide rail fixedly connected to the bottom of the groove of the base plate, a slide plate slidably connected to the top of the slide rail, a sample storage component fixedly connected to one side of the bottom of the slide plate, a liquid detector fixedly connected to one side of the top of the slide plate, the bottom of the liquid detector extending through the sample storage component into its interior, a drive motor fixedly connected to the other side of the top of the slide plate, a first gear fixedly connected to the outer surface of the output end of the drive motor, a moving cavity and a transmission cavity being formed inside the slide plate, the moving cavity being located at the bottom of the transmission cavity, a second gear and a third gear being rotatably connected to the two sides of the top of the moving cavity, ratchet grooves with opposite directions being formed on the inner surfaces of the second gear and the third gear, and the outer surfaces of the second gear and the third gear meshing with the outer surface of the first gear, a lifting component and a transmission component being rotatably connected to the two sides of the top of the transmission cavity, a sliding groove being formed on the side wall of the transmission cavity, a pushing component being rotatably connected to the side wall of the sliding groove, and an infusion component being fixedly connected to the side of the lifting component near the sample storage component.

[0008] In the above-mentioned water pollution detection device for rivers, the lifting assembly includes a first functional rod, a first ratchet disc is fixedly connected to the outer surface of the first functional rod, the top of the first ratchet disc is in contact with the inner surface of the second gear, a first guide groove is provided on the outer surface of the first functional rod, a lifting plate is slidably connected to the first functional rod on the outer surface of the first guide groove, and a fixing plate is fixedly connected to the side wall of the lifting plate.

[0009] In the aforementioned water pollution detection device for rivers, the transmission assembly includes a second functional rod, a second ratchet disc is fixedly connected to the outer surface of the second functional rod, the top of the second ratchet disc contacts the inner surface of the third gear, the outer diameter of the second functional rod is equal to the inner diameter of the lifting plate slot, and a worm groove is formed on the outer surface of the top of the second functional rod.

[0010] In the aforementioned water pollution detection device for rivers, the pushing assembly includes a third functional rod, a fourth gear is fixedly connected to the outer surface of the third functional rod on the transmission cavity, the outer surface of the fourth gear meshes with the worm groove, a second guide groove is provided on the outer surface of the third functional rod, a moving plate is slidably connected to the third functional rod on the outer surface of the second guide groove, and a telescopic plate is fixedly connected to the bottom of the moving plate.

[0011] In the above-mentioned water pollution detection device for rivers, the sample storage component includes a liquid storage tank, with limiting plates fixedly connected to the front and rear ends of both sides of the liquid storage tank, and a movable plate slidably connected between the two limiting plates. A sealing plug is fixedly connected to the side of the movable plate near the liquid storage tank, and a first connecting seat is fixedly connected to the front and rear ends of the movable plate. A connecting rod is rotatably connected to the outer surface of the first connecting seat.

[0012] In the aforementioned water pollution detection device for rivers, drainage channels are provided on both sides of the storage tank. The horizontal height of the drainage channels is equal to the horizontal height of the sealing plug, and the inner diameter of the drainage channels is equal to the outer diameter of the sealing plug.

[0013] In the aforementioned water pollution detection device for rivers, the infusion assembly includes a sealed box, an infusion pump fixedly connected inside the sealed box, a suction pipe and a discharge pipe fixedly connected to the bottom and top of the infusion pump respectively, a filter plate fixedly connected to the bottom of the inner surface of the suction pipe, a fixing rod fixedly connected to the front and rear ends of both sides of the bottom of the sealed box, a limiting plate fixedly connected to the bottom of the fixing rod, movable grooves opened at both the front and rear ends of the limiting plate, a limiting rod fixedly connected inside the movable groove, a cleaning plate slidably connected to the outer surface of the limiting rod, and a second connecting seat fixedly connected to both sides of the front and rear ends of the sealed box.

[0014] In the aforementioned water pollution detection device for rivers, the top of the drain pipe extends through the sealed box to the interior of the storage tank, the bottom of the suction pipe extends through the limiting plate to its bottom surface, the side wall of the sealed box is connected to the side wall of the fixed plate, the rear end of the top of the cleaning plate is connected to the bottom of the telescopic plate, and the outer surface of the second connecting seat is connected to the inner surface of the connecting rod groove.

[0015] Compared with existing technologies, the advantages of this water pollution detection device for rivers are:

[0016] I. This device, through the coordinated arrangement of slide rails, drive motor, first gear, second gear, and lifting assembly, allows the infusion assembly to move up and down and left and right. It can then be placed into the river according to user needs. The infusion pump included in the assembly then transfers river water to the storage tank. Finally, in conjunction with a liquid detector, it can detect the pollution level of the river water. This detection method prevents sediment in the river from covering the detection equipment, thus avoiding misreading or delayed responses, and also prevents impact damage to the detection equipment from flowing river water.

[0017] II. Through the arrangement of the first connecting seat, the connecting rod and the second connecting seat, this device can block the drainage channel opened in the liquid storage tank when the sealed box moves into the river water, thereby ensuring that the drive motor can detect the river water received by the liquid storage tank. It can also remove the sealing plug from the drainage channel when the sealed box moves out of the river water, thereby achieving automatic drainage.

[0018] Third, through the coordinated arrangement of the third gear, transmission assembly and pushing assembly, this device can work in conjunction with the reverse operation of the drive motor to allow the liquid extraction tube to drive the cleaning plate to move laterally, thereby allowing the cleaning plate to perform surface cleaning work on the filter plate, thus ensuring the infusion pump's infusion efficiency. Attached Figure Description

[0019] Figure 1 This is a front view of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the side cross-sectional structure of the skateboard of the present invention;

[0021] Figure 3 This is a schematic diagram of the side cross-sectional structure of the second gear of the present invention;

[0022] Figure 4 This is the present invention. Figure 3 Enlarged view of the A structure;

[0023] Figure 5 This is a schematic diagram of the top cross-sectional structure of the skateboard of the present invention;

[0024] Figure 6 This is a top sectional view of the sample storage component of the present invention;

[0025] Figure 7 This is a front cross-sectional view of the infusion assembly of the present invention;

[0026] Figure 8 This is a schematic diagram of the side cross-sectional structure of the cleaning plate of the present invention.

[0027] In the diagram: 1. Base plate; 2. Slide rail; 3. Slide plate; 4. Sample storage assembly; 5. Liquid detector; 6. Drive motor; 7. First gear; 8. Second gear; 9. Third gear; 10. Lifting assembly; 11. Transmission assembly; 12. Pushing assembly; 13. Infusion assembly; 14. First functional lever; 15. First ratchet disc; 16. Lifting plate; 17. Fixed plate; 18. Second functional lever; 19. Second ratchet disc; 20. Third functional lever; 21. Fourth gear; 22. Moving plate; 23. Telescopic plate; 24. Liquid storage tank; 25. Limiting plate; 26. Movable plate; 27. Sealing plug; 28. First connecting seat; 29. ​​Connecting rod; 30. Sealing box; 31. Infusion pump; 32. Suction pipe; 33. Drain pipe; 34. Filter plate; 35. Fixed rod; 36. Limiting plate; 37. Limiting rod; 38. Cleaning plate; 39. Second connecting seat. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Reference Figures 1-8 A water pollution detection device for rivers includes a base plate 1. A slide rail 2 is fixedly connected to the bottom of the groove of the base plate 1, and a slide plate 3 is slidably connected to the top of the slide rail 2. The operation of the slide rail 2 causes the slide plate 3 to move left and right. A sample storage component 4 is fixedly connected to one side of the bottom of the slide plate 3, and a liquid detector 5 is fixedly connected to one side of the top of the slide plate 3. The bottom of the liquid detector 5 extends through the sample storage component 4 and into its interior. The operation of the liquid detector 5 will detect the river water inside the sample storage component 4. A drive motor 6 is fixedly connected to the other side of the top of the slide plate 3. A first gear 7 is fixedly connected to the outer surface of the output end of the drive motor 6. The operation of the drive motor 6 will cause the first gear 7 to rotate.

[0031] The sliding plate 3 has a moving cavity and a transmission cavity inside. The moving cavity is located at the bottom of the transmission cavity. A second gear 8 and a third gear 9 are rotatably connected to the top two sides of the moving cavity. The inner surfaces of the second gear 8 and the third gear 9 have ratchet grooves facing opposite directions, and their outer surfaces mesh with the outer surface of the first gear 7. This meshing of the second gear 8 and the third gear 9 with the outer surface of the first gear 7 causes the second gear 8 and the third gear 9 to rotate when the first gear 7 rotates. Because the ratchet grooves on the inner surfaces of the second gear 8 and the third gear 9 are facing opposite directions, the second gear 8 can rotate counterclockwise or the third gear 9 can rotate counterclockwise. 9. When rotating clockwise, the second gear 8 and the third gear 9 have driving ability. The top of the transmission cavity is rotatably connected to the two sides of the lifting assembly 10 and the transmission assembly 11. The side wall of the transmission cavity is provided with a sliding groove. The side wall of the sliding groove is rotatably connected to the pushing assembly 12. The side of the lifting assembly 10 near the sample storage assembly 4 is fixedly connected to the infusion assembly 13. When the second gear 8 has driving ability, the lifting assembly 10 will drive the infusion assembly 13 to move up and down. In conjunction with the left and right movement of the slide plate 3, the infusion assembly 13 can be moved to the user's designated position. The operation of the infusion assembly 13 can transfer the river water at the designated position to the sample storage assembly 4.

[0032] Reference Figures 3-4The lifting assembly 10 includes a first functional rod 14, a first ratchet disc 15 fixedly connected to the outer surface of the first functional rod 14, the top of the first ratchet disc 15 contacting the inner surface of the second gear 8, a first guide groove being formed on the outer surface of the first functional rod 14, a lifting plate 16 being slidably connected to the outer surface of the first guide groove, and a fixing plate 17 being fixedly connected to the side wall of the lifting plate 16. The first ratchet disc 15, which is in contact with the inner surface of the second gear 8, allows the first ratchet disc 15 to drive the first functional rod 14 to rotate when the second gear 8 rotates counterclockwise, thereby allowing the lifting plate 16 to drive the infusion assembly 13 to move up and down reciprocally through the fixing plate 17.

[0033] The transmission assembly 11 includes a second functional lever 18, on the outer surface of which a second ratchet disc 19 is fixedly connected. The top of the second ratchet disc 19 contacts the inner surface of the third gear 9. The outer diameter of the second functional lever 18 is equal to the inner diameter of the slot of the lifting plate 16. A worm groove is formed on the outer surface of the top of the second functional lever 18. The second ratchet disc 19, which contacts the inner surface of the third gear 9, allows the second ratchet disc 19 to drive the second functional lever 18 to rotate when the third gear 9 rotates clockwise. This allows the worm groove of the second functional lever 18 to rotate. The second functional lever 18, which is equal to the inner diameter of the slot of the lifting plate 16, can also limit the lifting plate 16 during its up-and-down reciprocating movement.

[0034] Reference Figures 5-8 The sample storage assembly 4 includes a liquid storage tank 24, which is designed to store river water. Limiting plates 25 are fixedly connected to the front and rear ends of both sides of the liquid storage tank 24. A movable plate 26 is slidably connected between the two limiting plates 25. A sealing plug 27 is fixedly connected to the side of the movable plate 26 closest to the liquid storage tank 24. A first connecting seat 28 is fixedly connected to the front and rear ends of the movable plate 26. A connecting rod 29 is rotatably connected to the outer surface of the first connecting seat 28. Drainage channels are provided on both sides of the liquid storage tank 24 to drain the river water inside. The horizontal height of the drainage channels is equal to the horizontal height of the sealing plug 27, and the inner diameter of the drainage channels is equal to the outer diameter of the sealing plug 27.

[0035] The infusion assembly 13 includes a sealed box 30, the side wall of which is connected to the side wall of a fixed plate 17. The connection between the sealed box 30 and the fixed plate 17 allows the sealed box 30 to move up and down as the fixed plate 17 moves. An infusion pump 31 is fixedly connected inside the sealed box 30. A suction pipe 32 and a discharge pipe 33 are fixedly connected to the bottom and top of the infusion pump 31, respectively. The top of the discharge pipe 33 extends through the sealed box 30 into the interior of a storage tank 24. A filter plate 34 is fixedly connected to the bottom of the inner surface of the suction pipe 32. Fixed rods 35 are fixedly connected to the front and rear ends of both sides of the bottom of the sealed box 30. A limiting plate 36 is fixedly connected to the bottom of the fixed rods 35. The bottom of the suction pipe 32 extends through the limiting plate 36 to its bottom surface. The operation of the infusion pump 31 allows the suction pipe 32 to pump water from the river under test, which is then discharged into the filter plate 34 through the discharge pipe 33. The front and rear ends of the limiting plate 36 are... The sealing box 30 has a movable groove, inside which a limiting rod 37 is fixedly connected. A cleaning plate 38 is slidably connected to the outer surface of the limiting rod 37. Second connecting seats 39 are fixedly connected to both the front and rear ends of the sealing box 30. The outer surface of the second connecting seat 39 is connected to the inner surface of the groove of the connecting rod 29. The second connecting seat 39, in contact with the connecting rod 29, causes the connecting rod 29 to exert an inward pulling force on the first connecting seat 28 during the downward movement of the sealing box 30. This causes the first connecting seat 28, along with the movable plate 26 and the sealing plug 27, to move inward, allowing the sealing plug 27 to enter the drainage trough. Thus, when the drain pipe 33 supplies water to the storage tank 24, the river water can be discharged from the storage tank 24 through the drainage trough. When the sealing box 30 moves upward, the movable plate 26 and the sealing plug 27 move outward, allowing the sealing plug 27 to leave the drainage trough, enabling the drainage trough to function.

[0036] It should be noted that the drain pipe 33 is a corrugated pipe, which gives the drain pipe 33 tensile strength, so that the drain pipe 33 will not separate from the liquid storage tank 24 during the movement of the sealed box 30.

[0037] Reference Figure 5 and Figure 6The pushing assembly 12 includes a third functional rod 20. A fourth gear 21 is fixedly connected to the outer surface of the third functional rod 20 in the transmission cavity. The outer surface of the fourth gear 21 meshes with the worm groove. A second guide groove is formed on the outer surface of the third functional rod 20. A moving plate 22 is slidably connected to the outer surface of the third functional rod 20 in the second guide groove. A telescopic plate 23 is fixedly connected to the bottom of the moving plate 22. The rear end of the top of the cleaning plate 38 is connected to the bottom of the telescopic plate 23. The fourth gear 21 meshing with the worm groove causes the fourth gear 21 to rotate when the second functional rod 18 rotates. This causes the moving plate 22 to drive the telescopic plate 23 to move back and forth. Because the cleaning plate 38 is connected to the telescopic plate 23, the cleaning plate 38 also moves back and forth, thus allowing the cleaning plate 38 to clean the surface of the filter plate 34.

[0038] The following is a detailed explanation of the specific working principle and usage method of this invention: During the use of the equipment, the user needs to first start the slide rail 2, which drives the slide plate 3 to move laterally, thereby allowing the infusion assembly 13 to move above the river water. Then, the drive motor 6 runs in the forward direction, causing the first gear 7 to drive the second gear 8 and the third gear 9 to rotate counterclockwise. The counterclockwise rotation of the second gear 8 will drive the first ratchet disc 15 to rotate counterclockwise with the first functional lever 14, thereby allowing the lifting plate 16 to drive the sealing box 30 to move up and down through the fixed plate 17. When the sealing box 30 moves down to the bottom, the drive motor 6 stops running, and then the infusion pump 31 runs, causing the suction pipe 32 to extract the river water from inside the river, and then drain the river water into the storage tank 24 through the drain pipe 33. Finally, the drive motor 6 runs, allowing the drive motor 6 to detect the pollution level of the river water inside the storage tank 24.

[0039] It should be noted that during the downward movement of the sealing box 30, the second connecting seat 39 will exert an inward force on the first connecting seat 28 through the connecting rod 29, thereby causing the movable plate 26 and the sealing plug 27 to move inward, so that the sealing plug 27 blocks the drainage groove. As a result, after the drainage pipe 33 transports the river water into the storage tank 24, there will be no leakage of river water.

[0040] It should be noted that during the process of pumping liquid from the river by the pumping pipe 32, the drive motor 6 can be reversed, causing the first gear 7 to drive the second gear 8 and the third gear 9 to rotate clockwise. The clockwise rotation of the third gear 9 will drive the second ratchet disc 19 to rotate clockwise along with the second functional lever 18, which in turn will cause the fourth gear 21 to drive the third functional lever 20 to rotate. This will allow the moving plate 22 to move laterally along with the cleaning plate 38 via the telescopic plate 23, thereby allowing the cleaning plate 38 to perform surface cleaning work on the filter plate 34.

[0041] It should be noted that when the user needs to change the test river water, simply continue to run the drive motor 6 in the forward direction, which will cause the fixed plate 17 to move upward with the sealing box 30 at the bottom position. Then, the connecting rod 29 will drive the first connecting seat 28, the sealing plug 27 and the movable plate 26 to move outward, so that the sealing plug 27 will no longer block the drainage channel, allowing the drainage channel to drain the river water inside the liquid storage tank 24. Then, the operation of the slide rail 2 will continue to change the liquid extraction position of the liquid extraction pipe 32.

[0042] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A water pollution detection device for rivers, comprising a substrate, characterized in that: A slide rail is fixedly connected to the bottom of the substrate slot, and a slide plate is slidably connected to the top of the slide rail. A sample storage component is fixedly connected to one side of the bottom of the slide plate, and a liquid detector is fixedly connected to one side of the top of the slide plate. The bottom of the liquid detector extends through the sample storage component into its interior. A drive motor is fixedly connected to the other side of the top of the slide plate. A first gear is fixedly connected to the outer surface of the output end of the drive motor. A moving cavity and a transmission cavity are opened inside the slide plate. The moving cavity is located at the bottom of the transmission cavity. A second gear and a third gear are rotatably connected to the two sides of the top of the moving cavity. The inner surfaces of the second gear and the third gear are provided with ratchet grooves in opposite directions, and the outer surfaces of the second gear and the third gear mesh with the outer surface of the first gear. A lifting component and a transmission component are rotatably connected to the two sides of the top of the transmission cavity. A sliding groove is opened on the side wall of the transmission cavity. A pushing component is rotatably connected to the side wall of the sliding groove. An infusion component is fixedly connected to the side of the lifting component near the sample storage component. The lifting assembly includes a first functional rod, with a first pawl plate fixedly connected to its outer surface. The top of the first pawl plate contacts the inner surface of a second gear. A first guide groove is formed on the outer surface of the first functional rod. A lifting plate is slidably connected to the first functional rod on the outer surface of the first guide groove. A fixing plate is fixedly connected to the side wall of the lifting plate. The transmission assembly includes a second functional rod, with a second pawl plate fixedly connected to its outer surface. The top of the second pawl plate contacts the inner surface of a third gear. The outer diameter of the second functional rod is equal to the inner diameter of the groove in the lifting plate. A worm gear groove is formed on the outer surface of the top of the second functional rod. The pushing assembly... The component includes a third functional rod, on the outer surface of the transmission cavity, a fourth gear is fixedly connected to the third functional rod, the outer surface of the fourth gear meshes with the worm gear groove, a second guide groove is formed on the outer surface of the third functional rod, a movable plate is slidably connected to the third functional rod on the outer surface of the second guide groove, a telescopic plate is fixedly connected to the bottom of the movable plate, the sample storage assembly includes a liquid storage tank, limiting plates are fixedly connected to the front and rear ends of both sides of the liquid storage tank, a movable plate is slidably connected between the two limiting plates, a sealing plug is fixedly connected to the side of the movable plate near the liquid storage tank, and a first connecting seat is fixedly connected to the front and rear ends of the movable plate, a connecting rod is rotatably connected to the outer surface of the first connecting seat.

2. The water pollution detection device for rivers according to claim 1, characterized in that: The liquid storage tank has drainage grooves on both sides. The horizontal height of the drainage grooves is equal to the horizontal height of the sealing plug, and the inner diameter of the drainage grooves is equal to the outer diameter of the sealing plug.

3. A water pollution detection device for rivers according to claim 2, characterized in that: The infusion assembly includes a sealed box, an infusion pump fixedly connected inside the sealed box, a suction pipe and a discharge pipe fixedly connected to the bottom and top of the infusion pump respectively, a filter plate fixedly connected to the bottom of the inner surface of the suction pipe, a fixing rod fixedly connected to the front and rear ends of both sides of the bottom of the sealed box, a limiting plate fixedly connected to the bottom of the fixing rod, movable grooves are opened at both the front and rear ends of the limiting plate, a limiting rod is fixedly connected inside the movable groove, a cleaning plate is slidably connected to the outer surface of the limiting rod, and a second connecting seat is fixedly connected to both sides of the front and rear ends of the sealed box.

4. A water pollution detection device for rivers according to claim 3, characterized in that: The top of the drain pipe extends through the sealed box to the inside of the storage tank, the bottom of the suction pipe extends through the limiting plate to its bottom surface, the side wall of the sealed box is connected to the side wall of the fixed plate, the rear end of the top of the cleaning plate is connected to the bottom of the telescopic plate, and the outer surface of the second connecting seat is connected to the inner surface of the connecting rod groove.

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