Device for treating seabed mud pollutants
By designing an underwater mechanized seabed mud treatment device and utilizing stirring and adsorption mechanisms, the problem of difficult collection of heavy metals in seabed mud was solved, and rapid and efficient heavy metal collection and treatment was achieved.
Patent Information
- Application Number
- CN202311845015.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2043-12-28
AI Technical Summary
Existing technologies make it difficult to efficiently collect and treat heavy metal pollutants in seabed sediments, especially heavy metals in the bottom layer of the sediments, and conventional methods are inefficient, costly, or pose safety risks.
A device consisting of an inner cylinder and an outer cylinder was designed and mounted on an underwater mobile device. The device stirs the bottom mud through a stirring mechanism, uses electromagnets to absorb heavy metals, and uses an anti-diffusion mechanism to prevent the bottom mud from being washed away by seawater, thus realizing mechanized operation.
It achieves the rapid and efficient collection of heavy metals from seabed mud, improves work efficiency, avoids time-consuming and labor-intensive manual work, and reduces the risk of pollutant spread.
Smart Images

Figure CN117735794B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a pollutant collecting device, in particular to a device for treating seabed mud pollutants. Background Art
[0002] The factors that pollute the ocean mainly include land-based pollution, ship pollution, maritime accidents and marine waste disposal, all of which can lead to disasters such as red tides and green tides. Among them, pollutants such as heavy metals mostly sink to the bottom of the sea and mix in the bottom mud. It is very difficult to collect and treat these pollutants in a centralized manner. At present, the conventional solution mainly relies on planting plants, mainly using plants to absorb eutrophic pollutants or organic pollutants from polluted environments such as soil and water bodies, and degrade pollutants through the metabolic process of the plant body, partially or completely degrading or incorporating pollutants into plant tissues, thereby making the pollutants non-toxic or less toxic than before. Although this method is green and environmentally friendly, it requires a long cycle, is slow to take effect, is inefficient, and has poor practicality. Another method relies mainly on manual labor. Divers dive to the seabed and use handheld electromagnets to absorb heavy metals on the bottom mud. The metals are then placed in a collection box for unified collection. However, this method has high labor costs and low work efficiency. It can only process the surface of the bottom mud and is helpless for heavy metals at the bottom of the bottom mud. First, stirring the bottom mud will wash away the heavy metals. Second, the underwater divers have difficulty exerting force to dig out the bottom mud due to buoyancy. In summary, there is still no effective solution for heavy metals in seabed mud. Summary of the Invention
[0003] In order to make up for the shortcomings of the existing technology, the present invention provides a device for treating seabed sediment pollutants. It has a reasonable structural design and is easy to operate. It is carried on an underwater mobile device, which can easily stir up the sediment and stir out all the heavy metals buried in the bottom of the sediment. At the same time, it prevents the stirred sediment from being washed away by seawater. The mechanized operation does not require time-consuming and labor-intensive manual operation, greatly improves work efficiency, has a fast speed and good collection effect, and solves the problems existing in the existing technology.
[0004] The technical solution adopted by the present invention to solve the above technical problems is:
[0005] The cam is secured to the top of the bucket and has a camming handle which is secured to the bottom of the bucket and has a locking mechanism which allows the bucket to be locked in place during operation.
[0006] Optionally, the anti-diffusion mechanism includes a flange arranged at the bottom of the outer wall of the inner cylinder, an annular sleeve movably sleeved on the inner cylinder, a dust cover is provided downwardly on the outer side of the annular sleeve, and a sealing ring is provided at the bottom of the dust cover along its circumferential direction.
[0007] Optionally, a plurality of reinforcement plates connected to the inner wall of the outer cylinder are provided at intervals along the circumferential direction of the outer wall of the top of the inner cylinder.
[0008] Optionally, the adsorption and collection mechanism includes a push box horizontally connected to the side wall of the outer cylinder, a push cylinder is provided in the middle of the right side wall of the push box, the piston rod of the push cylinder passes through the right side wall of the push box horizontally and vertically and is connected to a push seat movably connected in the push box, a fixing frame extending into the top of the inner cylinder is horizontally provided on the side wall of the push seat, an electromagnet is provided on the fixing frame on the outer end side, a threaded pipe is provided on the bottom of the push box on the outer cylinder side, and a collection bucket is threadedly connected to the threaded pipe.
[0009] Optionally, a prism is sleeved on the outer wall of the bottom of the collecting barrel.
[0010] Optionally, the stirring mechanism includes a submersible motor arranged at the center of the top of the outer cylinder, the output shaft of the submersible motor moves downward through the top of the outer cylinder and is connected to the gear arranged in the outer cylinder, a driving shaft is vertically provided in the inner cylinder in the coaxial centerline direction, a linkage seat is provided at the upper end of the driving shaft, a tooth groove meshing with the gear is provided at the top of the linkage seat, a support sleeve is movably sleeved on the driving shaft at the bottom of the linkage seat, a number of connecting rods connected to the top of the outer cylinder are spaced apart along the circumferential direction of the support sleeve, and a first spiral blade is provided on the driving shaft along its height direction; a groove is provided at the lower end of the driving shaft, a linkage shaft is provided in the coaxial centerline direction of the driving shaft, and its upper end is movably engaged in the groove of the driving shaft, and pins are symmetrically provided on the left and right sides of the linkage shaft, and buffer grooves are vertically provided on the side walls of the driving shaft corresponding to the two pin positions along their height direction, and a second spiral blade is provided on the linkage shaft along its height direction.
[0011] Optionally, the lengths of the blades at the upper and lower ends of the first spiral blade are smaller than the length of the blade in the middle, and the first spiral blade is arranged in an elliptical shape as a whole.
[0012] Optionally, the length of the lower end blade of the second spiral blade is smaller than the length of the upper end blade thereof, and the whole is arranged in a conical shape.
[0013] Optionally, a fixed sleeve is movably sleeved on the outer wall of the drive shaft above the buffer groove, and a plurality of fixing rods connected to the inner wall of the inner cylinder are respectively provided on the outer wall of the fixed sleeve along its circumferential direction.
[0014] Optionally, a slide groove that is engaged with the drive seat is vertically provided along its height direction on the side wall of the traction frame corresponding to the position of the drive seat, and positioning blocks are respectively provided on the front and rear sides of the left end of the drive seat, and positioning grooves that cooperate with them are vertically provided along their height direction on the slide grooves corresponding to the positions of the two positioning blocks.
[0015] The present invention adopts the above technical solution, which has the following advantages: reasonable structural design, easy operation, and can be carried on an underwater mobile device to easily stir up the bottom mud, stirring out all the heavy metals buried in the bottom of the mud, while preventing the turned bottom mud from being washed away by sea water. The mechanized operation does not require time-consuming and labor-intensive manual operation, greatly improving work efficiency, and has a fast collection effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;
[0017] Figure 2 for Figure 1 Schematic diagram of the top view structure;
[0018] Figure 3 for Figure 2 AA-axis cross-sectional structural diagram;
[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the inner cylinder and the outer cylinder;
[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the pushing cylinder, pushing seat, fixing frame and electromagnet;
[0021] Figure 6 This is a schematic diagram of the three-dimensional structure of the submersible motor and gears;
[0022] Figure 7 Schematic diagram of the three-dimensional structure of the traction frame;
[0023] Figure 8 This is a schematic diagram of the three-dimensional structure of the anti-proliferation mechanism;
[0024] Figure 9It is a schematic diagram of the three-dimensional structure of the driving shaft and the linkage shaft;
[0025] In the figure, 1. inner cylinder; 2. outer cylinder; 3. guide pipe; 4. sand discharge cover; 5. drive seat; 6. traction frame; 7. guide rod; 8. lifting cylinder; 9. flange; 10. annular sleeve; 11. dust cover; 12. sealing ring; 13. reinforcement plate; 14. push box; 15. push cylinder; 16. push seat; 17. fixing frame; 18. electromagnet; 19. threaded pipe; 20. collecting bucket; 21. prism; 22. submersible motor; 23. gear; 24. drive shaft; 25. linkage seat; 26. tooth groove; 27. support sleeve; 28. connecting rod; 29. first spiral blade; 30. groove; 31. linkage shaft; 32. bayonet pin; 33. buffer groove; 34. second spiral blade; 35. fixed sleeve; 36. fixed rod; 37. slide groove; 38. positioning block; 39. positioning groove. DETAILED DESCRIPTION
[0026] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.
[0027] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.
[0029] like Figure 1-9 As shown, a device for treating seabed mud pollutants includes an inner cylinder 1 with open ends, an anti-diffusion mechanism is provided at the bottom of the inner cylinder 1, an outer cylinder 2 is sleeved on the top of the inner cylinder 1 in the direction of the coaxial centerline, the top of the outer cylinder 2 is sealed, and its bottom is fixedly connected to the outer wall of the inner cylinder 1, and a plurality of guide pipes 3 connected to the inner cylinder are provided at intervals along the circumferential direction of the bottom of the outer cylinder 2 on the right side, a sand discharge cover 4 is provided downwardly connected to the bottom of the outer cylinder 2 on the right side, and a driving seat 5 is provided on the outer wall of the outer cylinder 2 on the left side. The driving seat 5 is provided on one side of the traction frame 6, and two guide rods 7 are symmetrically and vertically provided on the front and rear sides of the side wall of the traction frame 6 facing the driving seat 5. Each of the guide rods 7 can move through the driving seat 5 respectively, and a lifting cylinder 8 is provided on the top of the traction frame 6. The piston rod of the lifting cylinder 8 can move downward through the top of the traction frame 6 and is connected to the driving seat 5. An adsorption and collection mechanism is provided on the outer wall of the outer cylinder 2 on the right side, and a stirring mechanism extending into the inner cylinder 1 is provided on the top of the outer cylinder 2.
[0030] Optionally, the anti-diffusion mechanism includes a flange 9 arranged at the bottom of the outer wall of the inner cylinder 1, an annular sleeve 10 is movably connected to the inner cylinder 1, a dust cover 11 is provided downward on the outer side of the annular sleeve 10, and a sealing ring 12 is provided at the bottom of the dust cover 11 along its circumferential direction.
[0031] Optionally, a plurality of reinforcing plates 13 connected to the inner wall of the outer cylinder 2 are provided at intervals along the circumference of the outer wall of the inner cylinder 1. The reinforcing plates 13 can further improve the connection strength between the inner cylinder 1 and the outer cylinder 2, thereby improving the stability of the device during operation.
[0032] Optionally, the adsorption and collection mechanism includes a push box 14 horizontally connected to the side wall of the outer cylinder 2, a push cylinder 15 is provided in the middle of the right side wall of the push box 14, the piston rod of the push cylinder 15 passes through the right side wall of the push box 14 horizontally and vertically and is connected to a push seat 16 that is movably connected to the push box 14, a fixing frame 17 extending into the top of the inner cylinder 1 is horizontally provided on the side wall of the push seat 16, an electromagnet 18 is provided on the fixing frame 17 on the outer end side, a threaded pipe 19 is connected to the bottom of the push box 14 on the side of the outer cylinder 2, and a collection bucket 20 is threadedly connected to the threaded pipe 19.
[0033] Optionally, a prism 21 is sleeved on the outer wall of the bottom of the collecting barrel 20 .
[0034] Optionally, the stirring mechanism includes a submersible motor 22 arranged at the center of the top of the outer cylinder 2, the output shaft of the submersible motor 22 moves downward through the top of the outer cylinder 2 and is connected to the gear 23 arranged in the outer cylinder 2, a drive shaft 24 is vertically provided in the inner cylinder 1 in the direction of the coaxial centerline, the upper end of the drive shaft 24 is provided with a linkage seat 25, the top of the linkage seat 25 is provided with a tooth groove 26 that meshes with the gear 23, a support sleeve 27 is movably sleeved on the drive shaft 24 at the bottom of the linkage seat 25, and a plurality of support sleeves 27 are provided on the outside of the support sleeve 27 along its circumferential direction. A connecting rod 28 connected to the top of the outer cylinder 2 is provided with a first spiral blade 29 on the drive shaft 24 along its height direction; a groove 30 is provided at the lower end of the drive shaft 24, and a linkage shaft 31 is arranged in the same axial direction as the drive shaft 24, the upper end of which is movably engaged in the groove 30 of the drive shaft 24, and bayonet pins 32 are symmetrically provided on the left and right sides of the linkage shaft 31, and buffer grooves 33 are vertically provided along its height direction on the side walls of the drive shaft 24 corresponding to the positions of the two bayonet pins 32, and a second spiral blade 34 is provided on the linkage shaft 31 along its height direction.
[0035] Optionally, the first spiral blade 29 is shorter at its upper and lower ends than at its middle portion, forming an overall elliptical shape. The shorter blade at the lower end of the first spiral blade 29 allows the water to form a vortex, thereby better carrying heavy metals upward within the inner tube 1. The longer blade in the middle portion evenly distributes the sediment and heavy metals mixed with seawater across the blade. The shorter blade at the upper end allows the sediment to be flung upward, separating it from the blade.
[0036] Optionally, the length of the lower blade of the second spiral blade 34 is smaller than that of the upper blade, and the whole is arranged in a conical shape. The length of the lower blade of the second spiral blade 34 is the smallest, which can easily and quickly insert the linkage shaft 31 into the bottom mud and reduce resistance.
[0037] Optionally, a fixed sleeve 35 is movably mounted on the outer wall of the drive shaft 24 above the buffer groove 33. A plurality of fixing rods 36 connected to the inner wall of the inner cylinder 1 are provided along the circumference of the outer wall of the fixed sleeve 35. The fixed sleeve 35 further limits the rotational position of the drive shaft 24 from shifting, serves as a limit for the lower end of the drive shaft 24, and thus improves the stability of the device operation.
[0038] Optionally, a chute 37 is provided vertically along the height direction of the traction frame 6 at the position corresponding to the drive seat 5, and is engaged with the drive seat 5. Positioning blocks 38 are provided on the front and rear sides of the left end of the drive seat 5, and positioning grooves 39 are provided vertically along the height direction of the chute 37 at the positions corresponding to the two positioning blocks 38. By engaging the drive seat 5 in the chute 37 and engaging the positioning blocks 38 on both sides in the corresponding positioning grooves 39, the drive seat 5 can be made more stable when moving up and down, reducing the sense of frustration.
[0039] Before using this device, it must be connected to the underwater mobile device, with the traction frame 6 bolted to the traction end of the underwater mobile device. When the underwater mobile device reaches the seabed, the lifting cylinder 8 is activated, causing its piston rod to push downward on the drive seat 5, which then moves downward along the guide rod 7. As the drive seat 5 moves downward, it in turn drives the outer cylinder 2, inner cylinder 1, and anti-diffusion mechanism until the anti-diffusion mechanism abuts the bottom mud of the seabed. At this point, the submersible motor 22 is activated, and its output shaft drives the gear 23. The drive shaft 24 rotates synchronously through the tooth grooves 26 in the linkage seat 25 that mesh with the gear 23. The upper end of the drive shaft 24 is fixed to the top of the outer cylinder 2 via a support sleeve 27 and a connecting rod 28, while its lower end is fixed in radial position by a fixing sleeve 35 and a fixing rod 36, preventing displacement. The drive shaft 24 rotates the linkage shaft 31 via the bayonet pin 32, causing the lower end of the linkage shaft 31 to gradually penetrate the bottom mud and lift the mud upward via the second spiral blade 34. Simultaneously, the dust cover 11, via the annular sleeve 10, moves upward as the inner cylinder 1 continuously moves downward, always abutting against the bottom mud to form a protective shield, thereby preventing heavy metals and the bottom mud from being washed away by seawater when the mud is stirred.
[0040] When the inner cylinder 1 abuts the bottom mud, as the linkage shaft 31 moves further downward, it passes through the latches 32 on both sides and moves downward within the two buffer grooves 33 of the drive shaft 24, stirring the bottom mud further downward within a limited range, increasing the excavation depth. The stirred bottom mud is driven upward by the second spiral blades 34, forming an upwelling current with the seawater. The first spiral blades 29 further lift the bottom mud to the top of the inner cylinder 1. A portion of the bottom mud contacts the electromagnet 18 of the fixed frame 17, causing the heavy metals therein to be attracted by the electromagnet 18 and discharged outward from the sand discharge cover 4. The remaining bottom mud flows into the outer cylinder 2 with the water flow and then flows back into the inner cylinder 1 through the various guide pipes 3, where the heavy metals are further separated from the bottom mud. The heavy metals and bottom mud flowing into the inner cylinder 1 undergo a secondary screening, making it easier for the heavy metals to be attracted by the electromagnet 18. When the area is completed with the flipping and adsorption, the push cylinder 15 is started, and the piston rod of the push cylinder 15 is contracted, thereby driving the fixed frame 17 to move through the push seat 16, so that the fixed frame 17 is moved into the push box 14 until the electromagnet 18 on the fixed frame 17 is positioned opposite the collection bucket 20. At this time, the electromagnet 18 is stopped, so that the heavy metals adsorbed on the electromagnet 18 are separated and collected into the collection bucket 20, and the whole operation is completed. It has a reasonable structural design and is easy to operate. It is mounted on an underwater mobile device, which can easily flip the bottom mud and stir out all the heavy metals buried in the bottom mud layer, while preventing the flipped bottom mud from being washed away by seawater. The mechanized operation does not require time-consuming and labor-intensive manual operation, greatly improving work efficiency, with high speed and good collection effect, solving the problems existing in the prior art.
[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. For those skilled in the art, any replacement improvements or changes made to the implementation methods of the present invention fall within the scope of protection of the present invention.
[0042] Any matters not described in detail in the present invention are well-known technologies to those skilled in the art.
Claims
1. A device for treating seabed mud pollutants, characterized in that: The cam is provided with an outer sleeve on the top of the inner cylinder and the outer sleeve is provided with an outer sleeve on the top of the inner cylinder in the direction of the central axis. The top of the outer cylinder is sealed, and the bottom is fixedly connected to the outer wall of the inner cylinder. A plurality of flow guide pipes connected to the inner cylinder are provided at intervals along the circumferential direction of the bottom of the outer cylinder. A sand discharge cover is provided downwardly at the bottom of the outer cylinder on the right side, and a driving seat is provided on the outer wall of the outer cylinder on the left side. The driving seat is provided on one side of the traction frame, and two guide rods are symmetrically and vertically provided on the front and rear sides of the traction frame side wall facing the driving seat. Each of the guide rods can move through the driving seat respectively. A lifting cylinder is provided on the top of the traction frame, and the piston rod of the lifting cylinder can move downward through the The top of the traction frame is connected to the driving seat, and an adsorption and collection mechanism is provided on the outer wall of the outer cylinder on the right side. The adsorption and collection mechanism includes a push box horizontally connected to the side wall of the outer cylinder, and a push cylinder is provided in the middle of the right side wall of the push box. The piston rod of the push cylinder passes through the right side wall of the push box horizontally and vertically and is connected to the push seat movably connected in the push box. A fixing frame extending into the top of the inner cylinder is horizontally provided on the side wall of the push seat, and an electromagnet is provided on the fixing frame on the outer end side. A threaded pipe is provided on the bottom of the push box on the side of the outer cylinder, and a collection bucket is threadedly connected to the threaded pipe. A stirring mechanism extending into the inner cylinder is provided at the top of the outer cylinder, and the stirring mechanism turns over the bottom mud and lifts it to the top of the inner cylinder.
2. The device for treating seabed mud pollutants according to claim 1, characterized in that: The anti-diffusion mechanism includes a flange arranged at the bottom of the outer wall of the inner cylinder, an annular ferrule movably sleeved on the inner cylinder, a dust cover is arranged downwardly on the outer side of the annular ferrule, and a sealing ring is arranged at the bottom of the dust cover along its circumferential direction.
3. The device for treating seabed mud pollutants according to claim 1, characterized in that: A plurality of reinforcing plates connected with the inner wall of the outer cylinder are arranged at intervals along the circumferential direction of the outer wall of the inner cylinder.
4. The device for treating seabed mud pollutants according to claim 1, characterized in that: A prism is sleeved on the outer wall of the bottom of the collecting barrel.
5. The device for treating seabed mud pollutants according to claim 3, characterized in that: The stirring mechanism includes a submersible motor arranged at the center of the top of the outer cylinder, the output shaft of the submersible motor moves downward through the top of the outer cylinder and is connected to the gear arranged in the outer cylinder, a drive shaft is vertically provided in the inner cylinder in the coaxial centerline direction, a linkage seat is provided at the upper end of the drive shaft, a tooth groove meshing with the gear is provided at the top of the linkage seat, a support sleeve is movably sleeved on the drive shaft at the bottom of the linkage seat, a number of connecting rods connected to the top of the outer cylinder are spaced apart along the circumferential direction of the support sleeve, and a first spiral blade is provided on the drive shaft along its height direction; a groove is provided at the lower end of the drive shaft, and a linkage shaft is arranged in the coaxial centerline direction with the drive shaft, and its upper end is movably engaged in the groove of the drive shaft, and pins are symmetrically provided on the left and right sides of the linkage shaft, and buffer grooves are vertically provided on the side walls of the drive shaft corresponding to the two pin positions along its height direction, and a second spiral blade is provided on the linkage shaft along its height direction.
6. The device for treating seabed mud pollutants according to claim 5, characterized in that: The lengths of the blades at the upper and lower ends of the first spiral blade are smaller than the length of the blade in the middle thereof, and the first spiral blade is arranged in an elliptical shape as a whole.
7. The device for treating seabed mud pollutants according to claim 5, characterized in that: The length of the lower end blade of the second spiral blade is smaller than the length of the upper end blade thereof, and the second spiral blade is arranged in a cone shape as a whole.
8. The device for treating seabed mud pollutants according to claim 5, characterized in that: A fixed sleeve is movably sleeved on the outer wall of the driving shaft above the buffer groove, and a plurality of fixing rods connected with the inner wall of the inner cylinder are respectively provided on the outer wall of the fixed sleeve along its circumferential direction.
9. The device for treating seabed mud pollutants according to claim 1, characterized in that: A slide groove that is engaged with the drive seat is vertically provided on the side wall of the traction frame corresponding to the position of the drive seat along its height direction, and positioning blocks are respectively provided on the front and rear sides of the left end of the drive seat. Positioning grooves that cooperate with them are vertically provided on the slide grooves corresponding to the positions of the two positioning blocks along their height direction.
Citation Information
Patent Citations
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CN212224029U
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CN215139124U