Shallow-buried drip irrigation device
By designing a shallow buried drip irrigation device and using adjustable casing and lower casing connection devices, the problem of poor adaptability of existing drip irrigation tape laying devices to different types of seeders and terrains has been solved, and lower equipment purchase costs have been achieved. and wider adaptability.
Patent Information
- Application Number
- CN202421181714.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The existing drip irrigation belt laying device has poor adjustability and is difficult to adapt to different types of seeders, resulting in increased equipment purchase costs and poor adaptability to terrain, which affects the drip irrigation operation effect and is difficult to load and unload.
Design a shallow buried drip irrigation device that uses an adjustable casing and lower casing connection device, and realizes flexible adaptation to the planter model and terrain through the main connecting rod, trenching shallow buried soil covering device and drip irrigation belt fixing device.
The device can match different models of seeders, reduce equipment purchase costs, adapt to a variety of terrains, improve the stability and safety of drip irrigation operations, and reduce the difficulty of loading and unloading.
Smart Images
Figure CN222340193U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of agricultural machinery, in particular to a shallow buried drip irrigation device. Background Art
[0002] Drip irrigation is a water-saving and efficient irrigation method. Combined with water-fertilizer integrated equipment, water and fertilizer solution can be dripped evenly and slowly into the soil near the root zone of crops through drip irrigation tape drippers, so that the soil in the root zone of crops can always maintain appropriate humidity, creating favorable conditions for high and stable yields of crops. Before drip irrigation, drip irrigation tapes need to be laid. In my country's field production, shallow buried drip irrigation technology is increasingly widely used. In Northeast China, North China, Inner Mongolia, Xinjiang and other regions, ensuring the supply of water and fertilizer during the emergence and critical growth period of grain crops is crucial to my country's food security and efficient use of water and fertilizer resources. However, the existing drip tape laying device is simply fixed behind a single seeding machine, has poor adjustability, and poor adaptability to different types of seeding machines, resulting in a set of drip tape laying devices corresponding to the same type of seeding machine. After the seeding machine is replaced, it cannot be matched and used, which increases the equipment purchase cost. In addition, most drip tape laying devices use straight rod rigid connection, which has poor adaptability to the terrain. The laying depth of the drip tape varies, which affects the subsequent drip irrigation operation. The drip tape brackets are all rigidly connected and located at a high position, especially on medium and large operating machinery, which greatly increases the difficulty and labor intensity of loading and unloading the drip tape. Utility Model Content
[0003] The utility model aims to solve the shortcomings in the prior art, such as poor adjustability resulting in poor adaptability to different types of seeding machines and inability to match after replacing the seeding machine, which increases the equipment purchase cost; the use of straight rod rigid connection resulting in poor adaptability to the terrain and causing the drip irrigation belt to be laid at different depths and affect the subsequent drip irrigation operation; the drip irrigation belt bracket and the central support shaft are rigidly connected and the position is relatively high, which greatly increases the difficulty of loading and unloading the drip irrigation belt and the labor intensity. A shallow buried drip irrigation device is proposed to solve the shortcomings in the prior art, such as poor adjustability resulting in poor adaptability to the terrain and inability to match after replacing the seeding machine, which increases the equipment purchase cost; the use of straight rod rigid connection resulting in poor adaptability to the terrain and causing the drip irrigation belt to be laid at different depths and affect the subsequent drip irrigation operation; the drip irrigation belt bracket and the central support shaft are rigidly connected and the position is relatively high, which greatly increases the difficulty of loading and unloading the drip irrigation belt and the labor intensity.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A shallow buried drip irrigation device is designed, comprising a main connecting rod and a ditching and shallow buried soil covering device, a cross bar is fixedly arranged on the left end face of the main connecting rod, a sleeve is sleeved on the outer wall of the left end of the cross bar through a positioning device, a fixing device for fixing the shallow buried drip irrigation device to the cross beam behind the seeder is fixedly arranged on the left end of the sleeve, a fixed plate is fixedly arranged on the top of the main connecting rod, and a rotating plate is fixedly connected to the top of the fixed plate through a buckle, the right end of the rotating plate is rotatably connected to the fixed plate through a hinge that can only rotate half a circle, and damping devices are arranged on both sides of the rotating plate, the top of the rotating plate is fixedly connected to the drip irrigation belt fixing device through an oblique support rod, the front and rear end faces of the main connecting rod are rotatably connected to the upper and lower connecting rods through a threaded column, and the outer end of the threaded column is threadedly connected to a nut, The right side of the main connecting rod is provided with a lower sleeve parallel to the main connecting rod, and the front and rear ends of the lower sleeve are rotatably connected to the upper and lower connecting rods through a threaded column, and the outer end of the threaded column is threadedly connected to a nut, and the outer end of the threaded column on the front and rear end surfaces of the main connecting rod is sleeved with a tension spring, and the upper end of the tension spring is sleeved on the outer end of the threaded column on the front and rear end surfaces of the lower sleeve, and the two ends of the tension spring are respectively clamped between two pairs of nuts on the threaded column, and a connecting rod is inserted into the lower end of the lower sleeve through a positioning device, and a trenching and shallow burial covering device is installed at the lower end of the connecting rod, and the trenching and shallow burial covering device includes a frame and two pairs of front and rear adjustable height covering plates installed on the frame, and a drip irrigation belt guide wheel is fixedly installed on the outer wall of the connecting rod.
[0006] Preferably, the drip irrigation tape fixing device includes a U-shaped bracket, a drip irrigation tape center support shaft, and a circular baffle. The top of the diagonal support rod is welded to the U-shaped bracket. A mounting groove is provided on the top, and a detachable drip irrigation tape center support shaft is rotatably installed in the mounting groove. The outer wall of the drip irrigation tape center support shaft is fixedly installed with detachable circular baffles located at both ends, and the inner wall of the circular baffle is integrally formed with a plurality of protruding structures in a circular array.
[0007] Preferably, the buckle includes a clamping block, a fixed frame, a rotating frame, a torsion spring, and a mounting seat. The top of the fixed plate is fixedly provided with a clamping block, and the left end face of the clamping block is provided with a clamping groove. The upper end face of the rotating plate is provided with a plug-in groove, and the clamping block is plugged into the plug-in groove. The upper end face of the rotating plate is provided with a rotating frame rotatable through the mounting seat. The round rod at the left end of the rotating frame is plugged into the mounting seat and the outer wall is sleeved with a torsion spring, and the two ends of the torsion spring are respectively fixedly connected to the rotating frame and the mounting seat. The front end face of the rotating frame is penetrated by a through hole located in the middle, and a fixed frame is rotatably arranged in the through hole. The thin round rod at the left end of the fixed frame is clamped in the clamping groove of the clamping block and clamped between the top of the clamping groove and the rotating plate.
[0008] Preferably, the positioning device includes two groups of fastening screws, the outer walls of the sleeve and the lower sleeve are respectively provided with a group of bosses, and the tops of the upper and lower groups of bosses are respectively provided with threaded holes that penetrate the sleeve and the lower sleeve respectively, the inner walls of the upper and lower groups of threaded holes are respectively threadedly connected with a group of fastening screws, and the lower ends of the upper and lower groups of fastening screws respectively abut the sleeve and the lower sleeve.
[0009] Preferably, the damping device includes an end shaft, a fixed damping plate, and a rotating damping plate. The front and rear ends of the rotating plate are welded with end shafts coaxial with the rotating axis of the hinge. The outer wall of the end shaft is sleeved with a fixed damping plate, and the fixed damping plate is fixedly connected to the fixed plate. The outer wall of the end shaft is slidably connected to the rotating damping plate through a key and a keyway, and a pressure regulating device is provided on the outer side of the rotating damping plate, and the rotating damping plate abuts against the fixed damping plate close to the side of the rotating plate.
[0010] Preferably, the pressure regulating device comprises a sleeve and a thrust bearing, the outer wall of the end shaft is threadedly connected with a sleeve located outside the rotating damping plate, and the outer wall of the end shaft is sleeved with a thrust bearing clamped between the rotating damping plate and the sleeve.
[0011] Preferably, the fixing device includes a fixing plate and a U-shaped screw, the left end of the sleeve is welded with a fixing plate, the left end face of the fixing plate is penetrated by two pairs of holes, and the holes are inserted with a crossbeam mounted on the rear of the seeder, the two ends of the fixing plate pass through and extend to the right side of the fixing plate, and the two ends of the fixing plate are threadedly connected with nuts.
[0012] The utility model proposes a shallow buried drip irrigation device, which has the beneficial effects of: the shallow buried drip irrigation laying device is simple to install, and the fixing device, the trenching shallow buried soil covering device and other devices and components are connected by adjustable sleeves, lower sleeves and other components, the horizontal and vertical distances are convenient to adjust, and it can match large, medium and small seed drills for different purposes, reducing the equipment purchase cost after replacing the seed drill. When installing and replacing the drip irrigation belt, the height can be lowered, which is safer and more convenient. The protruding baffles at both ends can ensure that the whole roll of drip irrigation belt is not scattered during operation. The parallel four-link structure is used to connect the trenching shallow buried soil covering device, which can be used in various terrains and plots, has wide adaptability, and a stable shallow buried depth. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The figure is a structural schematic diagram of a shallow buried drip irrigation device proposed by the utility model;
[0014] The figure is an enlarged view of area A of a shallow buried drip irrigation device proposed by the utility model;
[0015] The figure is an enlarged view of the B area of a shallow buried drip irrigation device proposed by the utility model;
[0016] The figure is an enlarged view of the C area of a shallow buried drip irrigation device proposed by the utility model;
[0017] The figure is an enlarged view of the D area of a shallow buried drip irrigation device proposed by the utility model.
[0018] In the figure: 1. tension spring; 2. main connecting rod; 3. cross bar; 4. fixing plate; 5. U-shaped screw; 6. casing; 7. fastening screw; 8. fixed plate; 9. rotating plate; 10. protruding structure; 11. circular baffle; 12. central support shaft of drip irrigation belt; 13. U-shaped bracket; 14. diagonal support rod; 15. connecting rod; 16. lower casing; 17. block; 18. fixed frame; 19. mounting seat; 20. torsion spring; 21. rotating frame; 22. end shaft; 23. sleeve; 25. fixed damping plate; 26. rotating damping plate; 27. threaded column; 28. connecting rod; 29. trenching shallow burial covering device; 30. drip irrigation belt guide wheel. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] Reference Figure 1-5 A shallow buried drip irrigation device comprises a main connecting rod 2 and a trenching and shallow buried soil covering device 29. A cross bar 3 is fixedly arranged on the left end face of the main connecting rod 2. A sleeve 6 is sleeved on the left end outer wall of the cross bar 3 through a positioning device. A fixing device for fixing the shallow buried drip irrigation device to the cross beam behind the seed drill is fixedly arranged on the left end of the sleeve 6. A fixed plate 8 is fixedly arranged on the top of the main connecting rod 2. A rotating plate 9 is fixedly connected to the top of the fixed plate 8 through a buckle. The right end of the rotating plate 9 is rotatably connected to the fixed plate 8 through a hinge that can only rotate half a circle. Damping devices are arranged on both sides of the rotating plate 9. The top of the rotating plate 9 is fixedly connected to the drip irrigation belt fixing device through an oblique support rod 14. The front and rear end faces of the main connecting rod 2 are rotatably connected to the upper and lower connecting rods 15 through a threaded column. The outer end of the threaded column is threadedly connected to a nut. The main connecting rod 2 A lower sleeve 16 parallel to it is provided on the right side, and the front and rear ends of the lower sleeve 16 are rotatably connected with the upper and lower connecting rods 15 through threaded columns, and the outer ends of the threaded columns are threadedly connected with nuts. The outer ends of the threaded columns located above the front and rear end surfaces of the main connecting rod 2 are sleeved with a tension spring 1, and the upper end of the tension spring 1 is sleeved on the outer end of the threaded column located above the front and rear end surfaces of the lower sleeve 16, and the two ends of the tension spring 1 are respectively clamped between the two pairs of nuts located on the threaded columns, and a connecting rod 28 is inserted into the lower end of the lower sleeve 16 through a positioning device, and a trenching and shallow burial covering device 29 is installed at the lower end of the connecting rod 28. The trenching and shallow burial covering device 29 includes a frame and two pairs of front and rear adjustable height covering plates installed on the frame, and a drip irrigation belt guide wheel 30 is fixedly installed on the outer wall of the connecting rod 28.
[0021] The drip irrigation belt fixing device includes a U-shaped bracket 13, a drip irrigation belt central support shaft 12, and a circular baffle 11. The top of the diagonal support rod 14 is welded to the U-shaped bracket 13. A mounting groove is opened on the top, and a detachable drip irrigation belt central support shaft 12 is rotatably installed in the mounting groove. The outer wall of the drip irrigation belt central support shaft 12 is fixedly installed with detachable circular baffles 11 located at both ends. A plurality of protruding structures 10 in a circular array are integrally formed on the inner wall of the circular baffle 11.
[0022] The buckle includes a clamping block 17, a fixed frame 18, a rotating frame 21, a torsion spring 20, and a mounting seat 19. The top of the fixed plate 8 is fixedly provided with a clamping block 17, and the left end face of the clamping block 17 is provided with a clamping groove. The upper end face of the rotating plate 9 is provided with an insertion groove, and the clamping block 17 is inserted into the insertion groove. The upper end face of the rotating plate 9 is rotatably provided with a rotating frame 21 through the mounting seat 19. The round rod at the left end of the rotating frame 21 is inserted into the mounting seat 19 and the outer wall is sleeved with a torsion spring 20. The two ends of the torsion spring 20 are respectively fixedly connected to the rotating frame 21 and the mounting seat 19. The front end face of the rotating frame 21 is penetrated with a through hole located in the middle, and the fixed frame 18 is rotatably arranged in the through hole. The thin round rod at the left end of the fixed frame 18 is clamped in the clamping groove of the clamping block 17 and clamped between the top of the clamping groove and the rotating plate 9.
[0023] The positioning device includes two groups of fastening screws 7, and the outer walls of the sleeve 6 and the lower sleeve 16 are respectively provided with a group of bosses, and the tops of the upper and lower groups of bosses are respectively provided with threaded holes that penetrate the sleeve 6 and the lower sleeve 16 respectively, and the inner walls of the upper and lower groups of threaded holes are respectively threadedly connected with a group of fastening screws 7, and the lower ends of the upper and lower groups of fastening screws 7 respectively abut the sleeve 6 and the lower sleeve 16.
[0024] The damping device includes an end shaft 22, a fixed damping plate 25, and a rotating damping plate 26. The front and rear ends of the rotating plate 9 are welded with an end shaft 22 coaxial with the rotating axis of the hinge. The outer wall of the end shaft 22 is sleeved with a fixed damping plate 25, and the fixed damping plate 25 is fixedly connected to the fixed plate 8. The outer wall of the end shaft 22 is slidably connected with the rotating damping plate 26 through a key and a keyway, and a pressure regulating device is provided on the outer side of the rotating damping plate 26. The rotating damping plate 26 abuts against the fixed damping plate 25 close to the side of the rotating plate 9.
[0025] The pressure regulating device includes a sleeve 23 and a thrust bearing. The outer wall of the end shaft 22 is threadedly connected with the sleeve 23 located outside the rotation damping plate 26 , and the outer wall of the end shaft 22 is sleeved with a thrust bearing clamped between the rotation damping plate 26 and the sleeve 23 .
[0026] The fixing device includes a fixing plate 4 and a U-shaped screw 5. The left end of the sleeve 6 is welded with the fixing plate 4. Two pairs of holes are penetrated through the left end surface of the fixing plate 4, and the holes are inserted with a crossbeam sleeved on the rear of the seeder. Both ends of the fixing plate 4 pass through and extend to the right side of the fixing plate 4, and both ends of the fixing plate 4 are threadedly connected with nuts.
[0027] Working principle: The parallel four-link structure composed of the main connecting rod 2, the lower casing 16 and the two connecting rods 15 keeps the lower casing 16 vertical and allows the lower casing 16 to rise and fall with the ground changes when shallowly buried. At the same time, the upper end of the lower casing 16 is pulled down by the tension spring 1 to maintain a constant pressure on the ground, so that the trenching and shallow burial covering device 29 is relatively independent, and the trenching and covering depth of the covering plate of the trenching and shallow burial covering device 29 is kept stable; the cross bar 3 and the connecting rod 28 can be extended and plugged out by unscrewing the fastening screws 7. It is easy to install and disassemble, and the vertical distance between the device and the ground and the horizontal distance between the device and the crossbeam of the planter can be adjusted to adapt to large, medium and small different uses. The drip irrigation belt center support shaft 12 and the circular baffles 11 at both ends are detachable and used to install a whole roll of drip irrigation belt. The protruding structure 10 can squeeze and fix the whole roll of drip irrigation belt to prevent the drip irrigation belt from being displaced and scattered during operation. The rotating frame 21 can be pushed up to make the fixed frame 18 disengage from the block 17, and the block 17 and the fixed frame 18 cooperate to fix the rotating plate 9. The U-shaped screw 5 can be rotated and laid down by rotating the rotating plate 9, so that the height can be lowered to more conveniently install and replace the drip irrigation belt. The friction between the fixed damping plate 25 and the rotating damping plate 26 can slow down the speed and impact of the U-shaped screw 5 falling down, so as to prevent the U-shaped screw 5 from falling down quickly and injuring personnel and lower parts such as the lower casing 16.
[0028] The shallow buried drip irrigation laying device is easy to install. The fixing device, the trenching shallow buried soil covering device 29 and other devices and components are connected by adjustable sleeves 6, lower sleeves 16 and other components. The horizontal and vertical distances are convenient to adjust. It can match large, medium and small seed drills for different purposes, reducing the equipment purchase cost after replacing the seed drill. The height can be lowered when installing and replacing the drip irrigation belt, which is safer and more convenient. The protruding baffles at both ends can ensure that the entire roll of drip irrigation belt is not scattered during operation. The parallel four-link structure is used to connect the trenching shallow buried soil covering device 29, which can be used in various terrains and plots, has a wide adaptability, and a stable shallow buried depth.
[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A shallow buried drip irrigation device, comprising a main connecting rod (2), a trenching shallow buried soil covering device (29), characterized in that: The left end face of the main connecting rod (2) is fixedly provided with a cross bar (3), the left end outer wall of the cross bar (3) is sleeved with a sleeve (6) through a positioning device, the left end of the sleeve (6) is fixedly provided with a fixing device for fixing the shallow buried drip irrigation device to the cross beam behind the seed drill, the top of the main connecting rod (2) is fixedly provided with a fixed plate (8), and the top of the fixed plate (8) is fixedly connected to a rotating plate (9) through a buckle, the right end of the rotating plate (9) is rotatably connected to the fixed plate (8) through a hinge that can only rotate half a circle, and damping devices are provided on both sides of the rotating plate (9), the top of the rotating plate (9) is fixedly connected to a drip irrigation belt fixing device through an oblique support rod (14), the front and rear end faces of the main connecting rod (2) are rotatably connected to upper and lower connecting rods (15) through threaded columns, and the outer end of the threaded column is threadedly connected to a nut, and the right side of the main connecting rod (2) is provided with a lower connecting rod parallel to the main connecting rod (2) The invention relates to a sleeve (16), wherein the front and rear ends of the lower sleeve (16) are rotatably connected to the upper and lower connecting rods (15) through threaded columns, and the outer ends of the threaded columns are threadedly connected to nuts. A tension spring (1) is sleeved on the outer ends of the threaded columns located above the front and rear end surfaces of the main connecting rod (2), and the upper ends of the tension spring (1) are sleeved on the outer ends of the threaded columns located above the front and rear end surfaces of the lower sleeve (16), and the two ends of the tension spring (1) are respectively clamped between two pairs of nuts located on the threaded columns. A connecting rod (28) is inserted into the lower end of the lower sleeve (16) through a positioning device, and a trenching and shallow burial covering device (29) is installed at the lower end of the connecting rod (28). The trenching and shallow burial covering device (29) comprises a frame and two pairs of front and rear height-adjustable covering plates installed on the frame. A drip irrigation belt guide wheel (30) is fixedly installed on the outer wall of the connecting rod (28).
2. A shallow buried drip irrigation device according to claim 1, characterized in that: The drip irrigation belt fixing device comprises a U-shaped bracket (13), a drip irrigation belt central support shaft (12), and a circular baffle (11); the top of the diagonal support rod (14) is welded to the U-shaped bracket (13); a mounting groove is provided on the top, and a detachable drip irrigation belt central support shaft (12) is rotatably installed in the mounting groove; the outer wall of the drip irrigation belt central support shaft (12) is fixedly installed with detachable circular baffles (11) located at both ends; and the inner wall of the circular baffle (11) is integrally formed with a plurality of protruding structures (10) in a circular array.
3. A shallow buried drip irrigation device according to claim 1, characterized in that: The buckle comprises a clamping block (17), a fixed frame (18), a rotating frame (21), a torsion spring (20), and a mounting seat (19); the clamping block (17) is fixedly arranged on the top of the fixed plate (8), and a clamping groove is provided on the left end surface of the clamping block (17); the upper end surface of the rotating plate (9) is provided with a plug-in groove, and the clamping block (17) is plugged into the plug-in groove; the upper end surface of the rotating plate (9) is rotatably provided with a rotating frame (21) through the mounting seat (19); the rotating frame (21 ) is inserted into the mounting seat (19) and the outer wall is sleeved with a torsion spring (20), the two ends of the torsion spring (20) are respectively fixedly connected to the rotating frame (21) and the mounting seat (19), the front end surface of the rotating frame (21) is penetrated by a through hole located in the middle, and a fixed frame (18) is rotatably arranged in the through hole, the thin round rod at the left end of the fixed frame (18) is clamped in the buckle groove of the clamping block (17) and clamped between the top of the buckle groove and the rotating plate (9).
4. A shallow buried drip irrigation device according to claim 3, characterized in that: The positioning device comprises two groups of fastening screws (7), the outer walls of the sleeve (6) and the lower sleeve (16) are respectively provided with a group of bosses, and the tops of the upper and lower groups of bosses are respectively provided with threaded holes respectively penetrating the sleeve (6) and the lower sleeve (16), the inner walls of the upper and lower groups of threaded holes are respectively threadedly connected with a group of fastening screws (7), and the lower ends of the upper and lower groups of fastening screws (7) respectively abut against the sleeve (6) and the lower sleeve (16).
5. The shallow buried drip irrigation device according to claim 1, characterized in that: The damping device comprises an end shaft (22), a fixed damping plate (25), and a rotating damping plate (26); the front and rear ends of the rotating plate (9) are welded with an end shaft (22) coaxial with the rotating axis of the hinge; the outer wall of the end shaft (22) is sleeved with a fixed damping plate (25), and the fixed damping plate (25) is fixedly connected to the fixed plate (8); the outer wall of the end shaft (22) is slidably connected with the rotating damping plate (26) through a key and a keyway, and a pressure regulating device is provided on the outer side of the rotating damping plate (26); the rotating damping plate (26) abuts against the fixed damping plate (25) on the side close to the rotating plate (9).
6. A shallow buried drip irrigation device according to claim 5, characterized in that: The pressure regulating device comprises a sleeve (23) and a thrust bearing. The outer wall of the end shaft (22) is threadedly connected with the sleeve (23) located outside the rotation damping plate (26). The outer wall of the end shaft (22) is sleeved with a thrust bearing clamped between the rotation damping plate (26) and the sleeve (23).
7. A shallow buried drip irrigation device according to claim 1, characterized in that: The fixing device comprises a fixing plate (4) and a U-shaped screw (5); the fixing plate (4) is welded to the left end of the sleeve (6); two pairs of insertion holes are penetrated through the left end surface of the fixing plate (4); a crossbeam sleeved at the rear of the seed drill is inserted into the insertion holes; the two ends of the fixing plate (4) penetrate and extend to the right side of the fixing plate (4); and nuts are threadedly connected to the two ends of the fixing plate (4).
Citation Information
Cited By
Drip irrigation tape laying device for planting sorghum hybrid sudangrass
CN120130347A