Rice and wheat dual-purpose high-speed sowing and ditching device and ditching method thereof

Abstract

The invention relates to a rice and wheat dual-purpose high-speed sowing and ditching device and a ditching method thereof. The device comprises a main frame, a parallel four-bar profiling mechanism, a depth limiting mechanism, a double-disc ditching mechanism, a sliding-cutting ditching mechanism, a seed discharging pipe and a pressing mechanism, the parallel four-rod profiling mechanism, the main frame and the pressing mechanism are sequentially connected from front to back, the depth limiting mechanism acting on the main frame is connected with the main frame, and the seed discharging pipe for guiding seeds at the upper part into a seed ditch at the lower part is fixed on the main frame; the double-disc ditching mechanism comprises a double-disc ditching component for ditching the upper section of a seed ditch, the sliding-cutting ditching mechanism comprises a sliding-cutting component for ditching the lower section of the seed ditch, the sliding-cutting component is fixed at the tail section of the seed discharging pipe, the double-disc ditching mechanism is mounted on the main frame, and the double-disc ditching component is positioned right in front of the sliding-cutting component. The high-speed ditching machine has the advantages of high-speed ditching, dual purpose of rice and wheat and stable ditch depth, and belongs to the technical field of high-speed agricultural equipment.

Description

Technical Field

[0001] The invention relates to high-speed agricultural machinery and equipment, in particular to a high-speed furrowing device for sowing and opening rice and wheat and a furrowing method thereof. Background Art

[0002] With the rapid development of agricultural mechanization equipment in China, the development of high-speed agricultural machinery has become a frontier field in the development of agricultural machinery. Sowing is one of the main links in agricultural production, and the mechanization and intelligent improvement of seeders has always been one of the most complex problems in agricultural machinery. At the same time, with the improvement of my country's urbanization level, the number of non-agricultural households has gradually increased, and the rural farming population has gradually decreased, resulting in the cultivation and management mode of cultivated land gradually changing from the original family management to centralized management. This has caused the speed of existing agricultural machinery to be unable to meet the speed required by the existing agricultural management model. Therefore, high-speed sowing has become an important research project in the field of agricultural machinery in various countries.

[0003] The operating speed is more than 12km / h for high-speed operation. The differences between high-speed sowing openers and low-speed sowing openers are mainly reflected in the following aspects: 1. Working resistance and energy consumption: When designing high-speed sowing openers, it is necessary to consider reducing working resistance and energy consumption during high-speed operation. Low-speed sowing openers do not need to specially consider the impact of airflow and soil dynamics during high-speed operation. 2. Soil disturbance and seed bed environment: When designing high-speed sowing openers, soil disturbance will be minimized to maintain the stability of the seed bed environment. This is especially important for high-speed sowing, because soil disturbance during high-speed operation will affect the sowing quality. Low-speed sowing openers are not as fine as high-speed sowing openers in soil disturbance control, because the impact of soil disturbance during low-speed operation is relatively small. 3. Structural design and materials: High-speed sowing openers use higher-strength materials and more sophisticated structural designs to withstand high loads and wear during high-speed operation; low-speed sowing openers have simpler and lighter structures, and the material strength requirements are not as high as those of high-speed sowing openers. Therefore, high-speed sowing openers and low-speed sowing openers are not universal.

[0004] my country has a large rice and wheat planting area and a wide span, and the planting methods and mechanization levels in different regions vary greatly. However, most of the planting areas of the two are the same, the sowing periods are close, and the sowing procedures are basically the same. Research on universal rice and wheat sowing machinery is conducive to solving problems such as idle machinery, high production costs and insufficient labor.

[0005] Many existing studies on furrowing devices are suitable for sowing seeds of crops such as corn and soybeans. There are studies on various furrow openers, but most of them are only suitable for low-speed operations. There are relatively few studies on furrowing devices suitable for sowing rice and wheat, and most of them can only adapt to low-speed environments. Further research is still needed on furrowing devices for sowing rice and wheat under high-speed operations. Summary of the invention

[0006] In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a high-speed furrowing device for rice and wheat dual-purpose sowing and furrowing with stable furrow depth and a furrowing method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A high-speed sowing furrowing device for both rice and wheat comprises a main frame, a parallel four-bar profiling mechanism, a depth-limiting mechanism, a double-disc furrowing mechanism, a sliding-cut furrowing mechanism, a seeding tube and a suppressing mechanism; the parallel four-bar profiling mechanism, the main frame and the suppressing mechanism are connected in sequence from front to back, the depth-limiting mechanism acting on the main frame is connected to the main frame, and the seeding tube for guiding the upper seeds into the lower seed furrow is fixed on the main frame; the double-disc furrowing mechanism comprises a double-disc furrowing component for opening the upper section of the seed furrow, the sliding-cut furrowing mechanism comprises a sliding-cut component for opening the lower section of the seed furrow, the sliding-cut component is fixed to the end section of the seeding tube, the double-disc furrowing mechanism is installed on the main frame, and the double-disc furrowing component is located directly in front of the sliding-cut component.

[0009] As a preferred embodiment, the double-disc ditching component includes two discs that are close to each other and form a "V" shape at the front and lower part.

[0010] As a preferred embodiment, the double-disc ditching mechanism also includes a ram shaft, a mounting frame, and a spring assembly; the two discs are mounted on the ram shaft and rotate relative to the ram shaft, the ram shaft is mounted on the mounting frame, and the mounting frame is mounted on the main frame. The spring assembly that provides downward pressure to the discs when ditching is arranged between the mounting frame and the main frame.

[0011] As a preferred embodiment, the sliding cutting component structurally includes a plowshare and a plowshare assembly for opening a lower seed furrow. A mounting groove is provided at the front lower part of the plowshare, and the plowshare assembly is embedded in the mounting groove and fixedly connected to the plowshare.

[0012] As a preferred embodiment, the sliding cutting component includes a left groove surface, an arcuate connecting surface, a right groove surface, and a lower groove surface which are smoothly connected in sequence; the arcuate connecting surface connects the left groove surface and the right groove surface at the front, the arcuate connecting surface is inclined from the upper rear to the lower front, and the lower groove surface is horizontally arranged.

[0013] As a preferred embodiment, the sliding cutting ditching mechanism also includes two soil retaining plates; the two soil retaining plates are arranged behind the plowshare, and a space for the seed pipe to pass through is enclosed between the two soil retaining plates and the plowshare; the seed pipe is arranged vertically, and the last section is a curved pipe inclined from the upper front to the lower rear.

[0014] As a preferred embodiment, the depth limiting mechanism includes two depth limiting wheels, two support arms, a rotating shaft, a lower limit plate, an upper limit block, and a handle adjustment assembly; a depth limiting wheel is installed on the outer side of the front end of a support arm, and the rear ends of the two support arms are connected to the main frame in a synchronous upward and downward swinging manner through the rotating shaft, the lower limit plate is connected to the main frame to lower the two support arms, the upper limit block is rotatably connected to the main frame and the rotational position of the upper limit block is adjusted by the handle adjustment assembly, and an upper limit protrusion is provided at the lower end of the upper limit block, which upper limit protrusions upper limit the two support arms; space is reserved between the two support arms to accommodate a seed tube, a sliding cutting component and a double disc ditching component.

[0015] As a preferred embodiment, the suppression mechanism includes a suppressor connecting frame, a suppressor bracket, two suppressor wheels, a suppressor spring, and a spring adjustment handle; the suppressor connecting frame is fixedly connected to the rear end of the main frame, the front section of the suppressor bracket is connected to the upper section of the suppressor connecting frame in an up and down swinging manner, the two suppressor wheels are connected to the suppressor bracket, the lower end of the spring adjustment handle is rotatably connected to the rear section of the suppressor bracket, the front end of the suppressor spring is connected to the lower section of the suppressor connecting frame, and the rear end of the suppressor spring is connected to the spring adjustment handle; the upper end of the suppressor bracket is provided with a plurality of position adjustment grooves that are interconnected and arranged front and back, and by controlling the spring adjustment handle to be stuck in a certain position adjustment groove, the height swing position of the suppressor bracket relative to the suppressor connecting frame is adjusted, thereby adjusting the height position of the suppressor wheel.

[0016] As a preferred embodiment, the parallelogram mechanism includes an upper link, a lower link, and a front link. The upper link, the front link, the lower link, and the main frame are connected in sequence, and the main frame is connected to the rear end of the upper link, so that the upper link, the front link, the lower link, and the main frame form a parallelogram mechanism for controlling the vertical lifting of the main frame; the front link is provided with a mounting hole connected to the seeder.

[0017] The invention discloses a furrowing method for a high-speed seeding furrowing device for rice and wheat. The device is installed on a seeder. A parallel four-bar profiling mechanism ensures the vertical lifting of a main frame. The furrow depth is adjusted by a depth limiting mechanism. The upper section of a seed furrow is opened by a double-disc furrowing component of a double-disc furrowing mechanism. Then, the lower section of a seed furrow is opened by a sliding cutting component of a sliding cutting furrowing mechanism. Seeds fall from the seeder into the seed furrow through a seed discharge pipe and are finally covered with soil by a pressing mechanism. The upper section of a seed furrow is opened first by utilizing the advantages of good passability and small soil disturbance of the double-disc furrowing component. Then, the lower section of a seed furrow is opened by utilizing the advantages of a flat furrow bottom and a vertical furrow wall of the seed furrow opened by the sliding cutting component, thereby improving the stability of sowing depth.

[0018] The principle of the present invention is:

[0019] The double disc furrowing component and the sliding cutting component are used together. The double disc furrowing component opens the upper part of the seed furrow, and the sliding cutting component opens the lower part of the seed furrow. The final seed furrow meets the needs of high-speed sowing operations, and the equipment meets the needs of both rice and wheat.

[0020] By using the advantages of the double disc ditching parts with good passability, the upper seed ditch can be opened to solve the problems of the sliding type ditching device easily getting entangled with grass, turning over too much soil, causing serious dry and wet soil mixing, and large soil moisture loss. At the same time, the upper seed ditch is cut and extruded by the double disc ditching parts, and the soil disturbance is less than that formed by sliding cutting.

[0021] The use of sliding cutting parts to open the lower seed furrow can take advantage of the flat and compacted bottom of the seed furrow opened by the double disc opener to solve the problem of uneven bottom of the seed furrow opened by the double disc opener. In addition, the vertical wall of the lower seed furrow is more adaptable to the poor rolling performance of rice and wheat seeds in areas with wet and high viscosity soil, compared with the V-shaped seed furrow with better performance at present, so that the seeds are easier to fall into the bottom of the furrow, thereby improving the stability of sowing depth.

[0022] The sliding cutting part is supported by the seed discharging pipe and there is a soil retaining plate at the rear, which can not only reduce the height of the seed outlet of the seed discharging pipe so that the seeds are not easy to fall out of the seed furrow, but also allow the soil to flow back after the seeds fall into the seed furrow, thereby improving the stability of sowing depth.

[0023] The present invention has the following advantages:

[0024] 1. By combining the advantages of the two furrow openers, the resistance can be reduced and the furrow depth can be kept stable and flat at high speeds, thus avoiding the problems of uneven furrow bottom at high speeds and the problem of turning the furrow bottom soil outside and causing moisture loss due to the respective disadvantages of the two furrow openers.

[0025] 2. Compared with traditional furrow openers, it has high working efficiency, good working effect, high reliability and simple installation. It is used for dry direct seeding in rice and wheat planting areas.

[0026] 3. A two-stage furrowing method, that is, the front double-disc furrowing component opens the upper half of the seed furrow, and the rear sliding cutting component opens the lower half of the seed furrow. This can facilitate the use of the respective advantages of the two furrow openers and reduce the respective defects of the two furrow openers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of a high-speed seeding and furrowing device for both rice and wheat.

[0028] Figure 2 It is a schematic diagram of the structure of a high-speed seeding and furrowing device for both rice and wheat.

[0029] Figure 3 It is a cross-sectional view of a high-speed seeding and furrowing device for both rice and wheat.

[0030] Figure 4 It is a three-dimensional diagram of the parallel four-bar copy mechanism.

[0031] Figure 5 It is a three-dimensional diagram of the main frame.

[0032] Figure 6 It is a structural diagram of the depth limiting mechanism.

[0033] Figure 7 It is a partial diagram of the depth limiting mechanism.

[0034] Figure 8 It is a three-dimensional diagram of the double-disc ditching component and the sliding cutting component.

[0035] Fig. 9 It is a stereoscopic view of the double disc ditching component and the sliding cutting component from another perspective.

[0036] Fig.10 It is a front view of the double disc ditching component and the sliding cutting component.

[0037] Fig.11 It is a schematic diagram of key parameters of double disc ditching components.

[0038] Fig.12 It is a schematic diagram of the sliding cutting curve of the sliding cutting component.

[0039] Fig.13 This is the ditching principle diagram.

[0040] In the figure, 1-main frame, 2-parallel four-bar profiling mechanism, 3-depth limiting mechanism, 4-double disc ditching mechanism, 5-sliding cutting ditching mechanism, 6-seed pipe, 7-suppression mechanism.

[0041] 21-upper link, 22-lower link, 23-front link, 24-mounting hole.

[0042] 31-depth limiting wheel, 32-support arm, 33-rotating shaft, 34-lower limiting plate, 35-upper limiting block, 36-handle adjustment assembly, 37-upper limiting protrusion.

[0043] 41- ram horn shaft, 42- mounting frame, 43- spring assembly, 44- disc.

[0044] 51-plowshare, 52-plowshare assembly, 53-installation groove, 54-soil retaining plate, 55-arc-shaped connecting surface, 56-lower trenching surface.

[0045] 71-packer connecting frame, 72-packer bracket, 73-packer wheel, 74-packer spring, 75-spring adjustment handle. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with specific implementation methods.

[0047] Embodiment 1

[0048] High-speed seeding and furrowing device for both rice and wheat, such as Figure 1 and Figure 2As shown, it includes a main frame, a parallel four-bar profiling mechanism, a depth limiting mechanism, a double-disc furrowing mechanism, a sliding furrowing mechanism, a seed discharge tube, and a suppressing mechanism; the parallel four-bar profiling mechanism, the main frame, and the suppressing mechanism are connected in sequence from front to back, the depth limiting mechanism acting on the main frame is connected to the main frame, and the seed discharge tube for guiding the upper seeds into the lower seed furrow is fixed on the main frame; the double-disc furrowing mechanism includes a double-disc furrowing component for opening the upper section of the seed furrow, the sliding furrowing mechanism includes a sliding cutting component for opening the lower section of the seed furrow, the sliding cutting component is fixed to the end section of the seed discharge tube, the double-disc furrowing mechanism is installed on the main frame, and the double-disc furrowing component is located directly in front of the sliding cutting component.

[0049] The following is a detailed introduction to each component.

[0050] (1) Main frame

[0051] like Figure 5 As shown, the main frame serves as the frame of the device and connects various mechanisms.

[0052] (2) Parallel Four-bar Profiling Mechanism

[0053] like Figure 4 As shown, the parallelogram mechanism includes an upper link, a lower link, and a front link. The upper link, the front link, the lower link, and the main frame are connected in sequence, and the main frame is connected to the rear end of the upper link, so that the upper link, the front link, the lower link, and the main frame form a parallelogram mechanism for controlling the vertical lifting of the main frame; the front link is provided with a mounting hole connected to the seeder.

[0054] (3) Depth Limiting Mechanism

[0055] like Figure 3 , Figure 6 and Figure 7 As shown, the depth limiting mechanism includes two depth limiting wheels, two support arms, a rotating shaft, a lower limit plate, an upper limit block, and a handle adjustment assembly; a depth limiting wheel is installed on the outer side of the front end of a support arm, and the rear ends of the two support arms are connected to the main frame in a synchronous swinging manner up and down through the rotating shaft, the lower limit plate is connected to the main frame to lower the two support arms, the upper limit block is rotatably connected to the main frame and the rotational position of the upper limit block is adjusted by the handle adjustment assembly, and an upper limit protrusion is provided at the lower end of the upper limit block, which upper limit protrusions upper limit the two support arms; space is reserved between the two support arms to accommodate a seed tube, a sliding cutting component and a double disc ditching component.

[0056] Specifically, the depth limiting wheel is also equipped with a scraper to scrape off excess mud on the depth limiting wheel.

[0057] During operation, the front and rear positions of the handles in the handle adjustment assembly are adjusted to adjust the rotational position of the upper limit block, thereby adjusting the position of the upper limit convex block, and the upper limit convex block presses against the upper end of the support arm to set the support arm to the upper limit.

[0058] (4) Double disc ditching mechanism

[0059] like Figure 8-10 As shown, the double-disc ditching component includes two discs that are close to each other and form a "V" shape at the front and lower parts.

[0060] The double disc ditching mechanism also includes a ram shaft, a mounting frame, and a spring assembly; both discs are mounted on the ram shaft and rotate relative to the ram shaft, the ram shaft is mounted on the mounting frame, the mounting frame is mounted on the main frame, and the spring assembly that provides downward pressure for the discs when ditching is arranged between the mounting frame and the main frame. Specifically, the bearing is fixed on the ram shaft, the bearing is covered with a bearing seat, and the disc is fixed on the bearing seat, so the disc rotates relative to the ram shaft through the bearing.

[0061] The spring in the spring assembly is in a tensioned state, and can provide pressure when the double disc trenching component enters the soil to overcome the shortcomings of its own soil-entering performance.

[0062] Specifically, the point where the two discs are close to each other is the convergence point. The convergence point m is the point where the two discs intersect at the disc angle φ. Its position is represented by the angle β between the straight line through the center of the circle and point m and the vertical line through the center of the circle. The position of the convergence point m should be designed according to the maximum depth of the seed trench required. The position of the convergence point of the double disc trenching component is as follows: Fig.11 As shown, the groove bottom width b is determined by the disk diameter D, the disk angle φ and the height of the gathering point. The calculation formula is:

[0063]

[0064] Where, D is the diameter of the disk, in mm, β is the angle between the disk convergence point, in degrees, ——disc angle, unit: °, b——groove bottom width, unit: mm.

[0065] (5) Sliding cutting groove mechanism

[0066] like Figure 8-10 As shown, the sliding cutting component structurally includes a plowshare and a plowshare assembly for opening the lower seed furrow, a mounting groove is provided at the front lower part of the plowshare, and the plowshare assembly is embedded in the mounting groove and fixedly connected to the plowshare. The plowshare assembly is mounted on the plowshare by bolts.

[0067] The shape of the sliding cutting component includes a left groove surface, an arc-shaped connecting surface, a right groove surface, and a lower groove surface which are smoothly connected in sequence; the arc-shaped connecting surface connects the left groove surface and the right groove surface at the front, the arc-shaped connecting surface is inclined from the upper rear to the lower front, and the lower groove surface is horizontally arranged.

[0068] The sliding cut ditching mechanism also includes two retaining plates; the two retaining plates are arranged behind the plowshare, and a space for a seeding pipe to pass through is formed between the two retaining plates and the plowshare; the seeding pipe is arranged vertically, and the last section is a curved pipe inclined from the upper front to the lower rear.

[0069] The sliding cutting and ditching mechanism is welded to the end section of the seed discharging pipe.

[0070] The retaining plate behind the plowshare can delay the return of soil so that the seeds can fall into the seed furrow as soon as possible. The inclination behind the plowshare can increase the amount of return soil. The seed pipe closely connected to the plowshare can also make the seeds reach the seed furrow as soon as possible to ensure the stability of the sowing depth.

[0071] There are many types of guide curves for the arc-shaped connecting surfaces of sliding cutting parts, such as straight line, arc, parabola, and exponential curve. Different curved surface shapes have different mechanical properties, that is, the degree of working resistance increasing with working speed satisfies the following rules from large to small: straight line, parabola, and exponential curve. Fig.12 As shown, the sliding cutting curve satisfies:

[0072]

[0073] Where C is 50mm. θ1 is the starting angle of the sliding curve, in degrees, θ2 is the ending angle of the sliding curve, in degrees, C = y2-y1

[0074] The coordinates of the starting point A of the sliding curve are (x1, y1), and the coordinates of the end point B of the sliding curve are (x2, y2).

[0075] In this embodiment, the horizontal distance between the sliding cutting component and the double-disc ditching component is 100 mm, and the vertical distance is 14 mm.

[0076] (6) Seed pipe

[0077] The seeding tube is a vertically arranged straight tube, the end of which is a curved tube inclined from the front upper part to the rear lower part, and the upper end is connected to the seed outlet of the seeder. The seeding tube is fixed on the main frame and guides the seeds output by the seeder into the seed trough below.

[0078] (7) Repressive institutions

[0079] like Figure 3 As shown, the suppression mechanism includes a suppressor connecting frame, a suppressor bracket, two suppressor wheels, a suppressor spring, and a spring adjusting handle; the suppressor connecting frame is fixedly connected to the rear end of the main frame, the front section of the suppressor bracket is connected to the upper section of the suppressor connecting frame in an up and down swinging manner, the two suppressor wheels are connected to the suppressor bracket, the lower end of the spring adjusting handle is rotatably connected to the rear section of the suppressor bracket, the front end of the suppressor spring is connected to the lower section of the suppressor connecting frame, and the rear end of the suppressor spring is connected to the spring adjusting handle; the upper end of the suppressor bracket is provided with a plurality of position adjustment slots that are interconnected and arranged front and back, and by controlling the spring adjusting handle to be stuck in a certain position adjusting slot, the height swing position of the suppressor bracket relative to the suppressor connecting frame is adjusted, thereby adjusting the height position of the suppressor wheel.

[0080] Specifically, the pressing wheel is installed on the pressing device bracket through long bolts and gaskets, and the position of the pressing wheel can be adjusted by adjusting the number of gaskets to control the width of the soil covering.

[0081] When the combined furrow opener of this embodiment is working, the double disc furrowing component in the front is responsible for opening the upper furrow, and the sliding cutting component and the retaining plate in the rear are responsible for opening the lower furrow. The two working components jointly open a furrow. Fig.13 As shown in Figure 2. h1 is the depth of the upper seed trench, and h2 is the depth of the lower seed trench.

[0082] Embodiment 2

[0083] The furrowing method of the high-speed sowing furrowing device for both rice and wheat adopts the high-speed sowing furrowing device for both rice and wheat of the first embodiment, and the specific steps are as follows:

[0084] The first step is to install the rice and wheat dual-purpose high-speed sowing and furrowing device on the seeder, then slowly lower the device while starting the seeder, and drive it in the farmland to be furrowed. During the driving process, the parallel four-bar profiling mechanism can ensure that the device also rises and falls vertically when driving in the undulating field, so as to ensure the consistency of the furrow depth; the depth limiting wheels in the depth limiting mechanism adjusted to the appropriate furrow depth are located on both sides of the double-disc furrowing component, which can ensure the timeliness of the device following the undulations of the field.

[0085] Step 2: The double disc furrowing component in this device first opens the upper half of the front furrow. Its advantage is that it can adapt to a variety of different soil types under high-speed operation and is not affected by the surface conditions of most fields. Its disadvantage is that the bottom of the furrow opened is uneven and the stability of the sowing depth cannot be guaranteed. The sliding cutting component in this device then opens the lower half of the rear furrow. Its advantage is that the bottom of the furrow opened is flat, which can ensure the stability of the furrow depth. The seed discharge tube, which has the function of connecting the seed discharge tube and the sliding cutting component, is close to the sliding cutting component to ensure that the seeds fall into the seed furrow as soon as possible, which can ensure the stability of the sowing depth. Its disadvantage is that the sliding cutting component is not suitable for the soil surface working conditions under high-speed conditions and will turn over the bottom soil, resulting in soil moisture reduction. The combination of the two furrow openers can retain the advantages of both while avoiding the disadvantages of the two furrow openers, and the working resistance of the two furrow openers after the combination is less than the working resistance of each of them separately.

[0086] Step 3: Continue to dig trenches at different locations in the farmland. After completing the trenching work in all areas, control the seeder to lift the device and then drive out of the farmland.

[0087] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A high-speed sowing and furrowing device for rice and wheat, characterized in that: It includes a main frame, a parallel four-bar profiling mechanism, a depth limiting mechanism, a double-disc furrowing mechanism, a sliding furrowing mechanism, a seed discharge tube, and a suppressing mechanism; the parallel four-bar profiling mechanism, the main frame, and the suppressing mechanism are connected in sequence from front to back, the depth limiting mechanism acting on the main frame is connected to the main frame, and the seed discharge tube for guiding the upper seeds into the lower seed furrow is fixed on the main frame; the double-disc furrowing mechanism includes a double-disc furrowing component for opening the upper section of the seed furrow, the sliding furrowing mechanism includes a sliding cutting component for opening the lower section of the seed furrow, the sliding cutting component is fixed to the end section of the seed discharge tube, the double-disc furrowing mechanism is installed on the main frame, and the double-disc furrowing component is located directly in front of the sliding cutting component.

2. The high-speed seeding and furrowing device for rice and wheat according to claim 1, characterized in that: The double disc ditching component includes two discs which are close to each other and form a "V" shape at the front and lower part.

3. The high-speed seeding and furrowing device for rice and wheat according to claim 2, characterized in that: The double-disc ditching mechanism also includes a ram shaft, a mounting frame, and a spring assembly; both discs are mounted on the ram shaft and rotate relative to the ram shaft, the ram shaft is mounted on the mounting frame, and the mounting frame is mounted on the main frame. The spring assembly that provides downward pressure to the discs when ditching is arranged between the mounting frame and the main frame.

4. The high-speed seeding and furrowing device for rice and wheat according to claim 1, characterized in that: The sliding cutting component structurally comprises a plowshare and a plowshare assembly block for opening a lower seed furrow. A mounting groove is provided at the front lower part of the plowshare, and the plowshare assembly block is embedded in the mounting groove and fixedly connected to the plowshare.

5. The high-speed seeding and furrowing device for rice and wheat according to claim 4, characterized in that: The shape of the sliding cutting component includes a left groove surface, an arc-shaped connecting surface, a right groove surface, and a lower groove surface which are smoothly connected in sequence; the arc-shaped connecting surface connects the left groove surface and the right groove surface at the front, the arc-shaped connecting surface is inclined from the upper rear to the lower front, and the lower groove surface is horizontally arranged.

6. The high-speed seeding and furrowing device for rice and wheat according to claim 4, characterized in that: The sliding cut ditching mechanism also includes two retaining plates; the two retaining plates are arranged behind the plowshare, and a space for a seeding pipe to pass through is formed between the two retaining plates and the plowshare; the seeding pipe is arranged vertically, and the last section is a curved pipe inclined from the upper front to the lower rear.

7. The high-speed seeding and furrowing device for rice and wheat according to claim 1, characterized in that: The depth limiting mechanism includes two depth limiting wheels, two supporting arms, a rotating shaft, a lower limit plate, an upper limit block, and a handle adjustment assembly; a depth limiting wheel is installed on the outer side of the front end of a supporting arm, and the rear ends of the two supporting arms are connected to the main frame in a synchronous swinging manner up and down through the rotating shaft, the lower limit plate is connected to the main frame to lower the two supporting arms, the upper limit block is rotatably connected to the main frame and the rotational position of the upper limit block is adjusted by the handle adjustment assembly, and an upper limit protrusion is provided at the lower end of the upper limit block, which upper limit protrusions upper limit the two supporting arms; space is reserved between the two supporting arms to accommodate a seed tube, a sliding cutting component, and a double disc ditching component.

8. The high-speed seeding and furrowing device for rice and wheat according to claim 1, characterized in that: The suppression mechanism includes a suppressor connecting frame, a suppressor bracket, two suppressor wheels, a suppressor spring, and a spring adjustment handle; the suppressor connecting frame is fixedly connected to the rear end of the main frame, the front section of the suppressor bracket is connected to the upper section of the suppressor connecting frame in an up and down swinging manner, the two suppressor wheels are connected to the suppressor bracket, the lower end of the spring adjustment handle is rotatably connected to the rear section of the suppressor bracket, the front end of the suppressor spring is connected to the lower section of the suppressor connecting frame, and the rear end of the suppressor spring is connected to the spring adjustment handle; the upper end of the suppressor bracket is provided with a plurality of position adjustment slots that are interconnected and arranged front and back, and by controlling the spring adjustment handle to be stuck in a certain position adjustment slot, the height swing position of the suppressor bracket relative to the suppressor connecting frame is adjusted, thereby adjusting the height position of the suppressor wheel.

9. The high-speed seeding and furrowing device for rice and wheat according to claim 1, characterized in that: The parallelogram mechanism comprises an upper link, a lower link and a front link. The upper link, the front link, the lower link and the main frame are connected in sequence, and the main frame is connected to the rear end of the upper link. Thus, the upper link, the front link, the lower link and the main frame form a parallelogram mechanism for controlling the vertical lifting of the main frame. The front link is provided with a mounting hole connected to the seeder.

10. A furrowing method for a high-speed furrowing device for rice and wheat according to any one of claims 1 to 9, characterized in that: The device is installed on the seeder, and the parallel four-bar contouring mechanism ensures the vertical lifting of the main frame. The furrow depth is adjusted by the depth limiting mechanism, and the upper section of the seed furrow is opened by the double-disc furrowing component of the double-disc furrowing mechanism, and then the lower section of the seed furrow is opened by the sliding cutting component of the sliding cutting furrowing mechanism. The seeds fall into the seed furrow from the seeder through the seed discharge pipe and are finally covered with soil by the pressing mechanism. The upper section of the seed furrow is opened first by utilizing the advantages of good passability and small soil disturbance of the double-disc furrowing component, and the lower section of the seed furrow is opened by utilizing the advantages of the flat bottom and vertical furrow wall of the seed furrow opened by the sliding cutting component, thereby improving the stability of sowing depth.

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