Corn double row fertilization device

Abstract

The invention relates to a double-row fertilizing device for corn. Two disc-type hole-piercing fertilizing mechanisms are arranged side by side at the lower end of a rolling bracket of the fertilizing device. The two disc-type hole-piercing fertilizing mechanisms correspond to two rows of corn seedlings respectively. Fertilizer in a fertilizer box of the fertilizing mechanism enters into a containing cavity of a rotating disc from a feeding pipe. A plurality of hole-piercing duckbill assemblies connected with the containing cavity are arranged on the side surface (rolling surface) of the rotating disc. During the rolling of the rotating disc on the ground surface, a plurality of hole-piercing duckbill assemblies successively pierce fertilizer holes corresponding to the corn seedlings on the ground surface. At the same time, the hole-piercing duckbill assemblies are opened by an opening and closing mechanism, and fertilizer temporarily stored in the containing cavity enters into the fertilizer holes from the hole-piercing duckbill. Then the hole-piercing duckbill assemblies are automatically closed to complete the hole-piercing fertilizing operation. The device can carry out double-row fertilizing for corn with high fertilizing efficiency, and can realize fixed-plant hole-piercing fertilization, with less water loss in the soil and higher fertilizer utilization rate.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery and equipment, and in particular to a double-row fertilization device for corn. Background Art

[0002] Corn, as the crop with the highest total output in the world, has always been praised as a longevity food. It is rich in protein, fat, vitamins, trace elements, cellulose, etc., and has great potential for developing high-nutrition and high-biological functional foods. Corn is an important source of feed for animal husbandry, breeding, aquaculture, etc., and is also one of the indispensable raw materials for food, medical and health care, light industry, chemical industry, etc. During the planting process of corn, it is necessary to fertilize the corn seedlings. The traditional fertilization method is mainly ground ditch fertilization. Ditch fertilization can improve the utilization rate of fertilizer to a certain extent, but the surface ditching will accelerate the loss of water in the soil, and there is a problem of damaging the root system of corn seedlings during the ditching process, which affects the normal growth of corn seedlings. At the same time, the ditching fertilization equipment has a high space requirement for the spacing between corn rows. The existing corn planting density can only adapt to the single-row ditching fertilization of the ditching equipment, and the fertilization efficiency is not high. Therefore, it is urgent to design a fertilization device that can maintain soil moisture, does not damage the root system of corn seedlings, and has a good fertilization effect. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a double-row fertilization device for corn.

[0004] The technical scheme of the present invention is: a double-row fertilizing device for corn, comprising a rolling bracket and two disc-type piercing fertilizing mechanisms, the rolling bracket comprising a U-shaped main bracket and two U-shaped wheel axle brackets, a fertilizer box is installed on the U-shaped main bracket, the two U-shaped wheel axle brackets are symmetrically installed at the lower ends of two support rods on both sides of the U-shaped main bracket, and the two disc-type piercing fertilizing mechanisms are respectively installed in the two U-shaped wheel axle brackets;

[0005] The disc-type hole-piercing fertilization mechanism comprises a rotating disc with a accommodating cavity inside, a hole-piercing duckbill assembly, and an opening and closing mechanism; a first feed port is provided at the center of one end plate of the rotating disc, and a feed pipe is rotatably connected to the first feed port, and the feed pipe is connected to the bottom of the fertilizer box through a feeding hose, and a connecting rod is provided between the U-shaped wheel axle bracket and the feed pipe to connect them as a whole, and a wheel axle for supporting the rotation of the rotating disc is provided between the centers of the two end plates of the rotating disc, and the wheel axle is connected between the lower ends of the U-shaped wheel axle bracket, and a plurality of discharge ports are evenly distributed in the middle of the side plates of the rotating disc, and a hole-piercing duckbill assembly is provided on each discharge port, and the hole-piercing duckbill assembly comprises a fixed duckbill and a movable duckbill, the fixed duckbill is radially fixed at the discharge port, the upper end of the movable duckbill is fixedly connected to a hinge shaft and is hinged to the fixed duckbill through the hinge shaft, and the duckbill cavity formed by the fixed duckbill and the movable duckbill covers the discharge port;

[0006] The opening and closing mechanism includes a Z-shaped bracket fixed to the lower end of the feed pipe, a blocking wheel assembly, and a blocking rod. The support plate at the lower end of the Z-shaped bracket is parallel to the end plate of the rotating disc, and an arc groove is provided at the inner end of the support plate, and a limit fold is provided at the lower edge of the outer end of the support plate. The blocking wheel assembly includes a swing plate and a plurality of blocking wheels. A circular protrusion is provided at the lower corner of the inner end of the support plate, and the upper end of the swing plate is hinged on the circular protrusion. The plurality of blocking wheels are rotatably connected to the middle of the inner side surface of the swing plate along the length direction. The blocking wheel on the upper end of the swing plate can correspond to the arc groove, and the blocking wheel at the lower end of the swing plate can correspond to the limit fold. The blocking rod is radially arranged on the outer side of the end surface of the rotating disc, and the lower end of the blocking rod is vertically fixedly connected to the hinge shaft of the movable duckbill, and the upper end of the blocking rod can correspond to the blocking wheel at the lower end of the swing plate. A torsion spring for driving the movable duckbill to close counterclockwise is provided between the blocking rod and the hinge shaft.

[0007] Preferably, a protective baffle is provided on the inner side of the swing plate, and the protective baffle is blocked between the blocking wheel and the limiting folding edge.

[0008] Preferably, a cache box is provided at the discharge port in the rotating disc, and the discharge port is located at one end of the cache box. A second feed port is provided in the middle of a side plate of the cache box, an inclined baffle is provided on the outer side of the second feed port, and a top plate is provided between the upper end of the inclined baffle and the side plate of the cache box, and a trumpet-shaped feed channel connected to the second feed port is formed between the top plate, the inclined baffle and the side plate of the cache box.

[0009] Preferably, an adjusting mechanism for controlling the opening size of the trumpet-shaped feed channel is provided on the end plate of the rotating disc, the adjusting mechanism includes an adjusting plate and a driving motor, a horizontal axis is provided on the upper end surface of the adjusting plate along the length square, the size of the adjusting plate matches the cross-sectional size of the trumpet-shaped feed channel, the adjusting plate is rotatably connected to the entrance of the trumpet-shaped feed channel via the horizontal axis, the driving motor is installed on the side plate of the rotating disc via a U-shaped bracket, and the driving shaft of the driving motor is coaxially fixedly connected to one end of the horizontal axis.

[0010] Preferably, a circular gear scale line is provided on the end plate of the rotating disc, an indicating disc is coaxially fixedly connected to the driving shaft of the driving motor, and the indicating tip on the indicating disc corresponds to the gear scale line.

[0011] Preferably, the cache box is in the shape of a cuboid, the size of one end of the cache box is smaller than the size of the other end, and the small-sized end of the cache box corresponds to the discharge port, and an inclined side plate is provided between the two ends of the cache box.

[0012] Preferably, the support rod of the U-shaped main bracket is configured as a telescopic support rod, the telescopic support rod includes a square tube rod, a square telescopic rod, and a spring. The upper side of the square tube rod is provided with a plurality of sockets, and a baffle rod is inserted into the sockets. The square telescopic rod is slidably connected in the square tube rod, and the spring is installed in the square tube rod. The lower end of the spring is pressed on the upper end surface of the square telescopic rod, and the upper end of the spring is pressed on the baffle rod. A sleeve is provided at the lower end of the square telescopic rod, and the cross bar at the upper end of the U-shaped axle bracket is sleeved in the sleeve. A threaded hole is provided on the side of the sleeve, and a set screw is inserted into the threaded hole.

[0013] Preferably, a limiting mechanism for controlling the sliding stroke of the square telescopic rod is provided between the square tube rod and the square telescopic rod; the limiting mechanism includes a first oblong hole arranged along the length direction of the lower side wall of the square tube rod, an oblong pin hole arranged on the middle side wall of the square support rod, and a limiting pin, and the limiting pin is inserted between the first oblong hole and the oblong pin hole.

[0014] Preferably, a micro switch is provided on the outer side of the cross bar at the upper end of the U-shaped wheel axle bracket, and a signal contact rod on the micro switch extends laterally out of the U-shaped wheel axle bracket.

[0015] The beneficial technical effects of the present invention are:

[0016] Firstly, the present invention designs a double-row fertilizing device for corn, wherein two disc-type hole-piercing fertilizing mechanisms are installed side by side at the lower end of a rolling bracket of the fertilizing device, and the two disc-type hole-piercing fertilizing mechanisms correspond to two rows of corn seedlings respectively. The fertilizer in the fertilizer box of the fertilizing mechanism enters into the accommodating cavity of the rotating disc from a feeding pipe, and a plurality of hole-piercing duckbill assemblies connected with the accommodating cavity are provided on the side surface (rolling surface) of the rotating disc. During the rolling of the rotating disc on the surface, a plurality of hole-piercing duckbill assemblies successively pierce fertilizer holes corresponding to the corn seedlings on the surface. At the same time, the hole-piercing duckbill assemblies are opened by an opening and closing mechanism, and the fertilizer temporarily stored in the accommodating cavity enters into the fertilizer holes from the hole-piercing duckbill, and then the hole-piercing duckbill assemblies are automatically closed to complete the hole-piercing fertilizing operation. The device can carry out double-row fertilization for corn, has high fertilization efficiency, and can realize fixed-plant hole-piercing fertilization, with less water loss in the soil and higher fertilizer utilization rate.

[0017] Then, the blocking wheel assembly of the opening and closing mechanism of the disc-type hole-piercing fertilization mechanism is rotatably connected to the lower end of the supporting plate, so that the blocking wheel assembly can swing in both clockwise and counterclockwise directions. When the rotating disc moves forward clockwise to fertilize, the upper end of the blocking rod blocks the lower end of one side of the blocking wheel assembly and pushes the blocking wheel assembly to rotate clockwise. When the blocking wheel contacts the limiting folded edge, resistance is generated on the blocking rod, and the blocking rod swings accordingly to open the hole-piercing duckbill assembly for fertilization. After fertilization is completed, the upper end of the blocking rod slides over the lower end of the blocking wheel assembly, and the torsion spring causes the hole-piercing duckbill assembly to reopen. The piercing duckbill assembly is in a closed state under the action of the torsion spring, and when the upper end of the blocking wheel assembly rotates into the arc groove, the blocking rod and the lower end of the blocking wheel assembly are separated. During this process, no conflict will occur between the blocking wheel assembly and the blocking rod, thereby realizing the counterclockwise rotation of the fertilizing device when reversing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the disc-type hole-piercing fertilization mechanism of the present invention;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the blocking wheel assembly of the present invention;

[0022] Figure 5 This is one of the main structural schematic diagrams of the disc-type hole-piercing fertilization mechanism of the present invention (the figure shows a schematic diagram of the blocking wheel assembly rotating in the clockwise direction and contacting with the limit folding edge);

[0023] Figure 6 This is the second main structural schematic diagram of the disc-type hole-piercing fertilization mechanism of the present invention (the figure shows a schematic diagram of the blocking wheel assembly rotating counterclockwise into the arc-shaped groove);

[0024] Figure 7 It is a rear structural schematic diagram of the disc-type hole-piercing fertilization mechanism of the present invention;

[0025] Figure 8 yes Figure 7 A partial enlarged view of

[0026] Fig. 9 yes Figure 7 AA section view;

[0027] Fig.10 yes Fig. 9 A partial enlarged view of

[0028] Fig.11 yes Fig. 9 BB to Pashtun;

[0029] Fig.12 yes Fig.11 A partial enlarged view of

[0030] Fig.13 yes Fig.11 CC section view;

[0031] Fig.14 yes Fig.11 DD section view;

[0032] Fig.15 It is a schematic diagram of the three-dimensional structure of the rolling bracket of the present invention;

[0033] Fig.16 It is a schematic diagram of the main structure of the support rod of the U-shaped main bracket;

[0034] Fig.17 yes Fig.16 EE section view;

[0035] Fig.18 yes Fig.17 FF section view;

[0036] Fig.19 yes Fig.18 A partial enlarged view of .

[0037] 101. Rolling bracket, 102. U-shaped main bracket, 1021. Square tube rod, 1022. Square telescopic rod, 1023. Spring, 1024. Sleeve, 1025. Stop rod, 1026. Jack, 1027. First oblong hole, 1028. Oblong pin hole, 1029. Limit pin, 103. U-shaped axle bracket, 1031. Micro switch, 1032. Signal contact rod, 104. Fertilizer box, 105. Feeding hose, 106. Connecting rod, 107. Disc-type piercing fertilization mechanism, 01. Rotating disc, 11. First feed inlet, 12. Feed pipe, 13. Discharge port, 14. Axle, 15. Accommodating chamber, 02. Piercing duckbill assembly, 21. Fixed duckbill, 22. Movable duckbill Mouth, 03. Opening and closing mechanism, 301. Z-shaped bracket, 31. Support plate, 311. Arc groove, 312. Limiting folding edge, 313. Circular convex block, 32. Block wheel assembly, 321. Swinging plate, 322. Block wheel, 323. Protective baffle, 331. Articulated shaft, 332. Baffle rod, 34. Torsion spring, 41. Cache box, 411. Oblique baffle, 412. Top plate, 413 Second feed port, 414. Trumpet-shaped feed channel, 415. Oblique side plate, 42. Adjustment mechanism, 421. U-shaped bracket, 422. Gear scale line, 423. Indicator disc, 424. Adjustment plate, 4241. Beveled edge, 425. Horizontal axis, 426. Drive motor, 427. Drive shaft, 51. Set screw. DETAILED DESCRIPTION

[0038] Embodiment 1, referring to Figures 1-19 of the specification, a double-row fertilizing device for corn comprises a rolling bracket and two disc-type hole-piercing fertilizing mechanisms, the rolling bracket comprises a U-shaped main bracket and two U-shaped axle brackets, a fertilizer box is mounted on the U-shaped main bracket, the two U-shaped axle brackets are symmetrically mounted on the lower ends of two support rods on both sides of the U-shaped main bracket, and the two disc-type hole-piercing fertilizing mechanisms are respectively mounted in the two U-shaped axle brackets;

[0039] The disc-type hole-piercing fertilization mechanism comprises a rotating disc with a accommodating cavity inside, a hole-piercing duckbill assembly, and an opening and closing mechanism; a first feed port is provided at the center of one end plate of the rotating disc, a feed pipe is rotatably connected to the first feed port, and a sealing ring is provided at the rotating connection, the feed pipe is connected to the bottom of the fertilizer box through a feeding hose, the fertilizer in the fertilizer box enters the accommodating cavity of the rotating disc from the feeding hose and the feed pipe, and a connecting rod is provided between the U-shaped wheel axle bracket and the feed pipe to connect them as a whole, a wheel axle for supporting the rotation of the rotating disc is provided between the centers of the two end plates of the rotating disc, one end of the wheel axle extends into the feed pipe from the first feed port, and extends out from the lower part of the feed pipe, and the lower part of the feed pipe A bearing is arranged between the wheel axle and the end plate of the rotating disc, and a bearing is arranged between the wheel axle and the end plate of the rotating disc. The wheel axle is connected between the lower ends of the U-shaped wheel axle bracket, so that the disc-type hole-piercing fertilization mechanism can rotate inside. A plurality of discharge ports are evenly distributed in the middle of the side plate of the rotating disc, and each discharge port is provided with a hole-piercing duckbill assembly, which includes a fixed duckbill and a movable duckbill. The fixed duckbill is radially fixed at the discharge port, and the upper end of the movable duckbill is fixedly connected to a hinge shaft and is hinged to the fixed duckbill through the hinge shaft. The duckbill cavity formed by the fixed duckbill and the movable duckbill covers the discharge port, and the fertilizer in the accommodating cavity enters the duckbill cavity from the discharge port. The soil of this hole-piercing duckbill can be automatically backfilled after piercing the hole.

[0040] The opening and closing mechanism includes a Z-shaped bracket fixed at the lower end of the feed pipe, a blocking wheel assembly, and a blocking rod. The support plate at the lower end of the Z-shaped bracket is parallel to the end plate of the rotating disc, and an arc groove is provided at the inner end of the support plate. The lower edge of the outer end of the support plate is provided with a limiting folded edge. The blocking wheel assembly includes a swing plate and a plurality of blocking wheels. A circular convex block is provided at the lower corner of the inner end of the support plate. The upper end of the swing plate is hinged on the circular convex block. The plurality of blocking wheels are rotatably connected to the middle of the inner side surface of the swing plate along the length direction. The blocking wheel on the upper end of the swing plate can correspond to the arc groove. The arc groove Used to increase the swing space of the stop wheel assembly, the stop wheel at the lower end of the swing plate can correspond to the limit folded edge, and the limit folded edge is used to limit the swing range of the stop wheel assembly. The stop rod is radially arranged on the outer side of the end face of the rotating disk, and the lower end of the stop rod is vertically fixedly connected to the hinge shaft of the movable duckbill. The swing of the stop rod can drive the movable duckbill to rotate in the fixed duckbill through the hinge shaft to realize the opening or closing of the piercing duckbill assembly. The upper end of the stop rod can correspond to the stop wheel at the lower end of the swing plate, and a torsion spring for driving the movable duckbill to close counterclockwise is provided between the stop rod and the hinge shaft.

[0041] A protective baffle is provided on the inner side of the swing plate, which is blocked between the blocking wheel and the limiting folding edge. The protective baffle is blocked between the blocking wheel and the limiting folding edge to protect the blocking wheel, avoid damage caused by frequent collisions between the blocking wheel and the limiting folding edge, and help to extend the service life of the blocking wheel.

[0042] A cache box is provided at the discharge port in the rotating disc, and the discharge port is located at one end of the cache box. A second feed port is provided in the middle of a side plate of the cache box. An inclined baffle is provided on the outer side of the second feed port, and a top plate is provided between the upper end of the inclined baffle and the side plate of the cache box. A trumpet-shaped feed channel connected to the second feed port is formed between the top plate, the inclined baffle and the side plates of the cache box. When the rotating disc rotates, the fertilizer in the accommodating cavity flows into the trumpet-shaped feed channel along the inner side wall of the rotating disc. The trumpet-shaped feed channel is used to guide the fertilizer to the second feed port and enter the cache box from the second feed port, which can increase the feeding speed of the cache box and ensure the feeding amount of the cache box.

[0043] The end plate of the rotating disc is provided with an adjusting mechanism for controlling the opening size of the trumpet-shaped feeding channel, the adjusting mechanism comprises an adjusting plate and a driving motor, the upper end surface of the adjusting plate is provided with a transverse axis along the length square, the size of the adjusting plate matches the cross-sectional size of the trumpet-shaped feeding channel, the adjusting plate is rotatably connected to the entrance of the trumpet-shaped feeding channel through the transverse axis, the driving motor is mounted on the side plate of the rotating disc through a U-shaped bracket, and the driving shaft of the driving motor is coaxially fixedly connected with one end of the transverse axis; a circular gear scale line is provided on the end plate of the rotating disc, and an indicating disc is coaxially fixedly connected to the driving shaft of the driving motor, and the indicating tip on the indicating disc corresponds to the gear scale line; the transverse axis at the upper end of the adjusting plate is driven to rotate by the driving motor, and the adjusting plate swings accordingly to adjust the opening size of the trumpet-shaped feeding channel, and at the same time, the indicating disc rotates synchronously with the transverse axis, and the indicating arrows on the indicating disc point to different gear scale lines, and the size of the opening adjusted by the adjusting plate is determined according to the gear scale line, so as to accurately control the amount of fertilizer applied.

[0044] The outer corners of the lower end of the adjusting plate are provided with beveled edges, which can change the flow direction of the fertilizer and play a turbulent role, which can not only break up the lumped fertilizer, but also avoid clogging at the entrance of the trumpet-shaped feeding channel of the fertilizer; and a transparent plate is provided in the middle of one end plate of the rotating disc, through which the internal situation of the rotating disc can be observed.

[0045] The cache box is in the shape of a rectangular parallelepiped, with one end of the cache box being smaller than the other end, and the small-sized end of the cache box corresponding to the discharge port, and an inclined side plate connecting the two ends of the cache box; this arrangement is used to increase the storage space of the cache box as much as possible and ensure that the stored fertilizer is completely discharged from the discharge port, and the inclined side plate plays a diversion role, which is beneficial for the fertilizer in the cache box to quickly flow into the discharge port.

[0046] The support rod of the U-shaped main bracket is set as a retractable support rod, and the retractable support rod includes a square tube rod, a square telescopic rod, and a spring. A plurality of sockets are provided on the upper side of the square tube rod, and a stop rod is inserted into the socket. The square telescopic rod is slidably connected in the square tube rod. The square tube rod and the square telescopic rod are provided for limiting in the circumferential direction to prevent the square telescopic rod from rotating. The spring is installed in the square tube rod, and the lower end of the spring is pressed on the upper end surface of the square telescopic rod, and the upper end of the spring is pressed on the stop rod. When the square telescopic rod slides in the square tube rod, the spring can increase the elastic support for the square telescopic rod, thereby playing a shock-absorbing effect on the disc-type piercing fertilization mechanism. A sleeve is provided at the lower end of the square telescopic rod, and the cross bar at the upper end of the U-shaped wheel axle bracket is sleeved in the sleeve. A threaded hole is provided on the side of the sleeve, and a set screw is inserted into the threaded hole.

[0047] A limiting mechanism for controlling the sliding stroke of the square telescopic rod is provided between the square tube rod and the square telescopic rod; the limiting mechanism comprises a first oblong hole arranged along the length direction of the lower side wall of the square tube rod, an oblong pin hole arranged on the middle side wall of the square support rod, and a limiting pin, the limiting pin being inserted between the first oblong hole and the oblong pin hole, and when the square telescopic rod slides up and down, the limiting pin slides up and down in the oblong hole accordingly, and the sliding stroke of the limiting pin and the square telescopic rod is controlled within the length range of the oblong hole; the limiting pin can also slide in the oblong pin hole, and thus the sliding stroke of the square telescopic rod is increased without increasing the length of the first oblong hole, which is beneficial to controlling the opening length of the oblong hole and ensuring the structural strength of the U-shaped main bracket.

[0048] A micro switch is provided on the outer side of the cross bar at the upper end of the U-shaped axle bracket, and the signal contact rod on the micro switch extends laterally out of the U-shaped axle bracket. The signal contact rod on the micro switch is used to give a signal of whether it touches the corn plant to determine whether the fertilization device has reached the fertilization position.

[0049] The working process and principle of the present invention are:

[0050] The double-row fertilizing device moves forward clockwise to perform hole-piercing fertilization operation.

[0051] The double-row fertilizing device is installed on a tractor for fertilizing. Two disc-type hole-piercing fertilizing mechanisms are respectively close to the roots of two rows of corn seedlings. When the tractor moves forward, the rotating discs of the two hole-piercing fertilizing mechanisms start to rotate. At the same time, the fertilizer in the fertilizer box enters the accommodating cavity of the rotating disc through the feeding pipe. The fertilizer in the accommodating cavity enters the buffer box from the trumpet-shaped feeding channel, and enters the hole-piercing duckbill assembly from the discharge port in the buffer box. At the same time, the hole-piercing duckbill assembly at the lower end of the side (rolling surface) of the rotating disc pierces deep holes on the ground. While piercing the holes, the movable duckbill on the The connected baffle rod rotates clockwise with the rotating disc, and when the upper end of the baffle rod contacts the baffle wheel at the lower end of the baffle wheel assembly, it pushes the baffle wheel assembly to rotate clockwise. When the baffle wheel assembly contacts the limit folded edge on the support plate, it stops swinging. At this time, the baffle rod is blocked and starts to swing, driving the hinge shaft to rotate to open the movable duckbill, and the fertilizer inside is applied to the deep hole. In the process of completing the fertilization, the baffle rod continues to swing and slide over the lower end of the baffle wheel assembly, and the torsion of the torsion spring causes the hole-piercing duckbill assembly to close again. After the hole-piercing duckbill assembly leaves the fertilization hole, the soil is automatically backfilled to cover the internal fertilizer, thereby realizing synchronous fertilization of double-row corn.

[0052] The double-row fertilizer device rotates counterclockwise when reversing.

[0053] The rotating discs of the two disc-type hole-piercing fertilization mechanisms rotate counterclockwise synchronously, and the blocking rod rotates counterclockwise accordingly. At this time, the torsion spring causes the hole-piercing duckbill assembly to be in a closed state. When the upper end of the blocking rod contacts the blocking wheel at the lower end of the blocking wheel assembly, it can push the blocking wheel assembly to rotate counterclockwise. When the upper end of the blocking wheel assembly rotates into the arc groove, the upper end of the blocking rod disengages from the lower end of the blocking wheel assembly. During this process, the blocking wheel assembly interferes with the blocking rod, thereby realizing the counterclockwise rotation of the double-row fertilization device when reversing.

Claims

1. A double-row fertilization device for corn, characterized by: It includes a rolling bracket and two disc-type piercing and fertilizing mechanisms. The rolling bracket includes a U-shaped main bracket and two U-shaped wheel axle brackets. A fertilizer box is installed on the U-shaped main bracket. The two U-shaped wheel axle brackets are symmetrically installed at the lower ends of two support rods on both sides of the U-shaped main bracket. The two disc-type piercing and fertilizing mechanisms are respectively installed in the two U-shaped wheel axle brackets. The disc-type hole-piercing fertilization mechanism comprises a rotating disc with a accommodating cavity inside, a hole-piercing duckbill assembly, and an opening and closing mechanism; a first feed port is provided at the center of one end plate of the rotating disc, and a feed pipe is rotatably connected to the first feed port, and the feed pipe is connected to the bottom of the fertilizer box through a feeding hose, and a connecting rod is provided between the U-shaped wheel axle bracket and the feed pipe to connect them as a whole, and a wheel axle for supporting the rotation of the rotating disc is provided between the centers of the two end plates of the rotating disc, and the wheel axle is connected between the lower ends of the U-shaped wheel axle bracket, and a plurality of discharge ports are evenly distributed in the middle of the side plates of the rotating disc, and a hole-piercing duckbill assembly is provided on each discharge port, and the hole-piercing duckbill assembly comprises a fixed duckbill and a movable duckbill, the fixed duckbill is radially fixed at the discharge port, the upper end of the movable duckbill is fixedly connected to a hinge shaft and is hinged to the fixed duckbill through the hinge shaft, and the duckbill cavity formed by the fixed duckbill and the movable duckbill covers the discharge port; The opening and closing mechanism comprises a Z-shaped bracket fixed to the lower end of the feed pipe, a stop wheel assembly, and a stop rod. The support plate at the lower end of the Z-shaped bracket is parallel to the end plate of the rotating disc, and an arc groove is provided at the inner end of the support plate, and a limit folding edge is provided at the lower edge of the outer end of the support plate. The stop wheel assembly comprises a swing plate and a plurality of stop wheels. A circular protrusion is provided at the lower corner of the inner end of the support plate. The upper end of the swing plate is hinged on the circular protrusion, and the plurality of stop wheels are rotatably connected to the middle of the inner side surface of the swing plate along the length direction. The stop wheel on the upper end of the swing plate can correspond to the arc groove, and the stop wheel at the lower end of the swing plate can correspond to the limit folding edge. The stop rod is radially arranged on the outer side of the end surface of the rotating disc, and the lower end of the stop rod is vertically fixedly connected to the hinge shaft of the movable duckbill. The upper end of the stop rod can correspond to the stop wheel at the lower end of the swing plate, and a torsion spring for driving the movable duckbill to close counterclockwise is provided between the stop rod and the hinge shaft. A cache box is provided at the discharge port in the rotating disc, the discharge port is located at one end of the cache box, a second feed port is provided in the middle of a side plate of the cache box, an inclined baffle is provided on the outside of the second feed port, and a top plate is provided between the upper end of the inclined baffle and the side plate of the cache box, and a trumpet-shaped feed channel connected to the second feed port is formed between the top plate, the inclined baffle and the side plate of the cache box; The end plate of the rotating disc is provided with an adjustment mechanism for controlling the opening size of the bell-shaped feed channel, the adjustment mechanism includes an adjustment plate and a drive motor, the upper end surface of the adjustment plate is provided with a horizontal axis along the length square, the size of the adjustment plate matches the cross-sectional size of the bell-shaped feed channel, the adjustment plate is rotatably connected to the entrance of the bell-shaped feed channel through the horizontal axis, the drive motor is installed on the side plate of the rotating disc through a U-shaped bracket, and the drive shaft of the drive motor is coaxially fixedly connected to one end of the horizontal axis; a chamfered edge is provided at the outer corner of the lower end of the adjustment plate; The end plate of the rotating disc is provided with a circular gear scale line, and the driving shaft of the driving motor is coaxially fixedly connected with an indicating disc, and the indicating tip on the indicating disc corresponds to the gear scale line.

2. A disc-type hole-piercing fertilization mechanism according to claim 1, characterized in that: The inner side edge of the swing plate is provided with a protective baffle, which is blocked between the blocking wheel and the limiting folding edge.

3. A disc-type hole-piercing fertilization mechanism according to claim 1, characterized in that: The cache box is in the shape of a cuboid, the size of one end of the cache box is smaller than the size of the other end, and the small-sized end of the cache box corresponds to the discharge port, and an oblique side plate is provided between the two ends of the cache box.

4. A disc-type hole-piercing fertilization mechanism according to claim 1, characterized in that: The support rod of the U-shaped main bracket is configured as a telescopic support rod, which includes a square tube rod, a square telescopic rod, and a spring. A plurality of insertion holes are provided on the upper side of the square tube rod, and a baffle rod is inserted into the insertion hole. The square telescopic rod is slidably connected in the square tube rod, and the spring is installed in the square tube rod. The lower end of the spring is pressed on the upper end surface of the square telescopic rod, and the upper end of the spring is pressed on the baffle rod. A sleeve is provided at the lower end of the square telescopic rod, and the cross bar at the upper end of the U-shaped wheel axle bracket is sleeved in the sleeve. A threaded hole is provided on the side of the sleeve, and a set screw is inserted into the threaded hole.

5. A disc-type hole-piercing fertilization mechanism according to claim 4, characterized in that: A limiting mechanism for controlling the sliding stroke of the square telescopic rod is provided between the square tube rod and the square telescopic rod; the limiting mechanism includes a first oblong hole provided along the length direction of the lower side wall of the square tube rod, an oblong pin hole provided on the middle side wall of the square support rod, and a limiting pin, and the limiting pin is inserted between the first oblong hole and the oblong pin hole.

6. A disc-type hole-piercing fertilization mechanism according to claim 1, characterized in that: A micro switch is arranged on the outer side of the cross bar at the upper end of the U-shaped wheel axle bracket, and a signal contact rod on the micro switch extends horizontally out of the U-shaped wheel axle bracket.

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