Deep soil targeted injection slow-release fertilizer applicator

Abstract

The present application relates to the technical field of agricultural tools, and particularly relates to a deep soil targeted injection type slow-release fertilizer applicator; the present application comprises a fertilizer box, a discharging pipe and a discharging plug mechanism, the discharging pipe is provided with spiral blades and a driving support box, the driving support box is rotationally connected with the discharging pipe, and the driving support box is provided with a driving mechanism for driving the discharging pipe to rotate; in the present application, through linkage design of the pressing spring and the plugging piece, the pipe bottom is automatically closed when the discharging pipe drills into the soil, so that soil blocks are prevented from entering the channel to block the channel, when the pipe is reversed and lifted, the plugging piece is separated from the pipe bottom under the action of the pressing spring to form a gap, and slow-release fertilizer is precisely injected into deep soil.

Description

Technical Field

[0001] This invention relates to the field of agricultural implements technology, and in particular to a deep soil targeted injection slow-release fertilizer applicator. Background Technology

[0002] Slow-release fertilizers are highly regarded for their ability to continuously and stably release nutrients, meeting the long-term growth needs of crops and reducing nutrient loss and environmental pollution. However, traditional fertilization equipment mainly involves surface application and shallow soil mixing. Surface application easily leads to fertilizer volatilization and loss, making it difficult for crop roots to absorb effectively. Although shallow soil mixing can reduce loss, the fertilization depth is limited and cannot meet the precise nutrient needs of crop roots at different growth stages. In particular, for crops that require deep soil support, shallow fertilization cannot achieve a continuous supply of nutrients.

[0003] Currently, deep fertilization involves applying fertilizer into deeper soil layers, but the fertilization depth is uncontrollable and prone to clogging. Deep tillage machines or drilling equipment have difficulty accurately controlling the fertilization depth during the fertilization process, and the equipment is easily clogged due to soil texture or impurities, which in turn affects the fertilization effect. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a deep soil targeted injection slow-release fertilizer applicator to solve the problems mentioned in the background art, such as the difficulty in accurately and efficiently applying slow-release fertilizer to the deep soil required by crop roots, and the easy blockage of the feed pipe caused by soil during deep fertilization.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A deep soil targeted injection slow-release fertilizer applicator includes a fertilizer tank, a discharge pipe communicating with the fertilizer tank, and a discharge plug mechanism disposed on the discharge pipe. The discharge pipe is equipped with helical blades and a drive support box, which is rotatably connected to the discharge pipe. The drive support box contains a drive mechanism for driving the discharge pipe to rotate. The fertilizer tank is located at the top of the drive support box, and the drive support box is equipped with several sets of depth support frames.

[0007] As an improvement of the present invention, an inner groove is provided in the feeding tube, and the feeding plug mechanism includes a pressure spring disposed in the inner groove, a push ring disposed at the lower end of the pressure spring, and a sealing member connected to the push ring.

[0008] As a further improvement of the present invention, a connecting rod is provided inside the pushing ring, and the connecting rod is fixedly connected to the sealing member; the sealing member includes a guide rod fixedly connected to one end of the connecting rod and a sealing head provided at the bottom of the guide rod; the sealing head is tapered, and a guide surface is provided at the end of the sealing head away from its tip, and a matching surface corresponding to the guide surface is provided at the lower end of the inner wall of the feed tube.

[0009] As a further improvement of the present invention, a support rod is provided on the inner wall of the lower end of the feeding tube, and a guide ring is provided on the support rod, the guide ring being movably connected to the guide rod.

[0010] As a further improvement of the present invention, the driving mechanism includes a driving motor disposed in the driving support box, a first helical gear connected to the driving motor, and a second helical gear disposed in the feed tube, wherein the first helical gear and the second helical gear are meshed together.

[0011] As a further improvement of the present invention, the depth support frame includes a main support frame disposed in the drive support box, a telescopic frame movably disposed on the main support frame, and a locking bolt disposed on the telescopic frame. The main support frame has a plurality of positioning holes, and the positioning holes are inserted and matched with the locking bolt.

[0012] As a further improvement of the present invention, the telescopic frame includes a movable sleeve that is movably fitted onto the main support, an upright plate that is movably inserted into the movable sleeve, a horizontal plate disposed in the middle section of one side of the upright plate, a stabilizing plate disposed at the lower end of the upright plate, and an elastic component disposed between the horizontal plate and the movable sleeve.

[0013] As a further improvement of the present invention, the elastic component includes a limiting rod disposed at the bottom end of the movable sleeve, a pressure stabilizing spring sleeved on the limiting rod, and a retaining ring disposed on the limiting rod.

[0014] As a further improvement of the present invention, the movable sleeve is provided with a first movable groove and a second movable groove. The first movable groove is matched and inserted into the main support, and the second movable groove is matched and inserted into the upright plate. The horizontal plate is provided with a limiting groove and a guide groove. The limiting groove is matched and inserted into the limiting rod, and the guide groove is matched and inserted into the main support.

[0015] As a further improvement of the present invention, a miniature electric ball valve is provided at the upper end of the feeding pipe, and a handle is provided on the drive support box, and a switch electrically connected to the miniature electric ball valve is provided on the handle.

[0016] In this invention, through the linkage design of the pressure spring and the sealing component, the bottom of the feeding pipe is automatically sealed when it drills into the soil to prevent soil clogging the channel. When it reverses and lifts, the sealing component separates from the bottom of the feeding pipe under the action of the pressure spring, forming a gap, thus enabling the slow-release fertilizer to be accurately injected into the deep soil. In this invention, the depth support frame, through the telescopic design of the main support and the telescopic frame, can adjust the fertilization depth according to the actual situation, so that the slow-release fertilizer can accurately reach the set depth, ensuring that the crops receive good nutrient supply. At the same time, the design of the elastic component of the telescopic frame allows the bottom position of the telescopic frame to move from above to below the feeding pipe after adjustment. Thus, when the feeding pipe enters the soil with the spiral blades, the circular array of telescopic frames presses the ground under the action of the elastic component, thereby stabilizing the equipment, preventing it from tilting to the left or right, and ensuring that the feeding pipe can drill vertically into the set depth. This ensures that the feeding pipe drills vertically into the set depth, avoids fertilization deviation caused by tilting, and ensures the accuracy of targeted fertilization. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the deep soil targeted injection slow-release fertilizer applicator of the present invention;

[0018] Figure 2 This is a schematic diagram of the feeding pipe and feeding plug mechanism of the present invention;

[0019] Figure 3 This is a schematic diagram of the drive mechanism and the feed tube of the present invention;

[0020] Figure 4 This is an exploded structural diagram of the feeding pipe and feeding plug mechanism of the present invention;

[0021] Figure 5 This is a schematic diagram of the sealing component of the present invention;

[0022] Figure 6 This is a schematic diagram of the depth support frame of the present invention;

[0023] Figure 7 This is an exploded structural diagram of the telescopic frame of the present invention;

[0024] Reference numerals: 1. Fertilizer bin; 2. Feeding pipe; 201. Spiral blade; 202. Embedded groove; 203. Matching surface; 204. Support rod; 205. Guide ring; 3. Feeding plug mechanism; 301. Compression spring; 302. Push ring; 303. Connecting rod; 4. Drive support box; 5. Drive mechanism; 501. Drive motor; 502. First helical gear; 503. Second helical gear; 6. Depth support frame; 601. Main support; 602. Locking screw 603. Locating hole; 7. Sealing component; 701. Guide rod; 702. Sealing head; 703. Guide surface; 8. Telescopic frame; 801. Movable sleeve; 802. Vertical plate; 803. Horizontal plate; 804. Stabilizing plate; 805. First movable groove; 806. Second movable groove; 807. Limiting groove; 808. Guide groove; 9. Elastic component; 901. Limiting rod; 902. Pressure stabilizing spring; 903. Retaining ring; 10. Miniature electric ball valve; 11. Handle. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] like Figures 1 to 7 As shown, a deep soil targeted injection slow-release fertilizer applicator of the present invention includes a fertilizer tank 1, a feeding pipe 2 connected to the fertilizer tank 1, and a feeding plug mechanism 3 disposed at the bottom of the feeding pipe 2.

[0028] In this invention, a spiral blade 201 is provided at the lower end of the circumferential side wall of the feeding pipe 2, and a drive support box 4 is provided at the upper end of the feeding pipe 2. The drive support box 4 and the feeding pipe 2 are rotatably connected, and a drive mechanism 5 for driving the feeding pipe 2 to rotate is provided inside the drive support box 4.

[0029] In this invention, the fertilizer box 1 is located at the top of the drive support box 4, and the bottom of the drive support box 4 is provided with a ring array of multiple deep support frames 6.

[0030] This invention is a handheld device that powers the drive mechanism 5 via a battery. The fertilizer tank 1 is fixedly connected to the top of the drive support box 4. The fertilizer tank 1 is used to hold slow-release fertilizer. The fertilizer tank 1 and the discharge pipe 2 are rotatably connected. The bottom of the discharge pipe 2 touches the ground, and then the drive mechanism 5 drives the discharge pipe 2 to rotate, thereby causing the spiral blade 201 at the lower end of the circumferential side wall of the discharge pipe 2 to rotate. The lower end of the spiral blade 201 is conical, making it easier for the spiral blade 201 to penetrate into the soil when rotating. At the same time, the discharge pipe 2 is equipped with a discharge plug mechanism 3 at the bottom end, so that when the discharge pipe 2 penetrates into the ground with the spiral blade 201, the soil will not enter the channel of the discharge pipe 2, thus preventing subsequent discharge. It should be noted that the discharge plug mechanism 3 does not block the discharge pipe 2 in the initial state. Only when it presses down against the soil, its resistance force causes the discharge plug mechanism 3 to move upward, thereby blocking the discharge pipe 2.

[0031] In this invention, before the feeding pipe 2 penetrates deep into the ground, the length of the depth support frame 6 is adjusted according to the soil fertilization requirements. This ensures that the bottom of the feeding pipe 2 penetrates to a certain depth and then cannot move further, representing the set fertilization depth. Specifically, after the spiral blade 201 carries the feeding pipe 2 into the soil, when the depth support frame 6 comes into contact with the ground, the feeding pipe 2 cannot continue to move downwards, thus reaching the fertilization depth. At this point, the drive mechanism 5 drives the feeding pipe 2 to rotate in the opposite direction, thereby causing the spiral blade 201 to rotate. When the feed pipe 1 moves upward, the feed pipe 2 moves upward as well. However, the feed plug mechanism 3 is sealed by the soil against the feed pipe 2. Therefore, when the feed pipe 2 moves upward, the feed plug mechanism 3 does not move upward synchronously with the feed pipe 2. When the feed plug mechanism 3 and the bottom of the feed pipe 2 return to the initial distance, the lower end of the feed pipe 2 is open. The slow-release fertilizer in the fertilizer box 1 falls into the deep soil through the gap between the feed pipe 2 and the feed plug mechanism 3, thereby realizing the targeted injection of slow-release fertilizer into the deep soil.

[0032] In this invention, an inner groove 202 is provided on the inner wall of the lower end of the feeding pipe 2. The feeding plug mechanism 3 includes a compression spring 301 disposed in the inner groove 202, a push ring 302 disposed at the lower end of the compression spring 301, and a sealing member 7 connected to the push ring 302. The push ring 302 is movably disposed in the inner groove 202. One end of the compression spring 301 abuts against the top of the inner wall of the inner groove 202, and the other end abuts against the top of the push ring 302. In the initial state, under the action of the compression spring 301, the bottom of the push ring 302 abuts against the bottom of the inner wall of the inner groove 202. The compression spring 301 is disposed in the inner groove 202. When the slow-release fertilizer is fed, it passes through the central area of ​​the compression spring 301. When the push ring 302 abuts against the bottom of the inner wall of the inner groove 202, there is a certain gap between the sealing member 7 and the bottom of the feeding pipe 2, so that the slow-release fertilizer can slide out of the gap and enter the soil.

[0033] In this invention, the sealing member 7 cannot move downwards when it touches the ground. At this time, by pressing down the feed pipe 2, the pushing ring 302 slides within the inner groove 202 until the sealing member 7 touches the bottom of the feed pipe 2. The sealing member 7 then seals the feed pipe 2, preventing soil from entering the channel of the feed pipe 2 and causing blockage of its slow-release fertilizer feed channel during the drilling process. Then, as the driving mechanism 5 drives the feed pipe 2 to rotate, the conical end of the spiral blade 201 drills into the soil and penetrates deeper into the soil. The feed pipe 2 and the sealing component 7 are inserted into the ground, causing them to penetrate deeper. When the depth set by the depth support frame 6 is reached, the equipment can no longer move down. At this time, the drive mechanism 5 drives the feed pipe 2 to reverse and move it up gradually through the spiral path. When the feed pipe 2 moves up, the sealing component 7 gradually separates from the bottom of the feed pipe 2, thus forming an initial gap. At this time, the fertilizer in the fertilizer box 1 falls through the feed pipe 2 and then through the initial gap between the feed pipe 2 and the sealing component 7, realizing the deep targeted injection of slow-release fertilizer.

[0034] In this invention, a connecting rod 303 is provided on the inner wall of the pushing ring 302, and the connecting rod 303 and the sealing member 7 are fixedly connected. The sealing member 7 includes a guide rod 701 fixedly connected to one end of the connecting rod 303, and a sealing head 702 provided at the bottom of the guide rod 701. The sealing head 702 is tapered, and a guide surface 703 is provided at the end of the sealing head 702 away from the tip. A matching surface 203 corresponding to the guide surface 703 is provided at the lower end of the inner wall of the feed pipe 2.

[0035] In this invention, the connecting rod 303 is symmetrically arranged and is used to connect the guide rod 701 of the sealing component 7. The guide rod 701 is coaxially arranged with the discharge pipe 2, and the diameter of the guide rod 701 is much smaller than the inner diameter of the discharge pipe 2, so that the slow-release fertilizer has a sufficient falling channel in the discharge pipe 2. Specifically, in use, the tip of the sealing head 702 is first inserted into the soil. As the discharge pipe 2 is pressed down, the resistance of the conical sealing head 702 in the soil gradually exceeds the elastic force of the pressing spring 301, so that the sealing head 702 moves upward until the guide surface 703 on the sealing head 702 fits against the matching surface 203 of the corresponding discharge pipe 2. Thus, the channel is sealed before the discharge pipe 2 penetrates into the soil, thereby avoiding the situation where soil enters the channel of the discharge pipe 2 after the discharge pipe 2 enters the soil layer, causing the discharge pipe 2 to become blocked.

[0036] In this invention, a support rod 204 is provided on the lower inner wall of the feed pipe 2 and above the embedded groove 202, and a guide ring 205 is provided on the support rod 204. The guide ring 205 is movably inserted into the guide rod 701. The guide ring 205 and the feed pipe 2 are coaxially arranged, and the maximum diameter of the guide ring 205 is smaller than the inner diameter of the feed pipe 2 channel. The slow-release fertilizer has sufficient flow gap to ensure the feeding of the slow-release fertilizer. Through the setting of the guide ring 205, the sealing member 7 can ensure the vertical movement of the axis under the dual limiting of the push ring 302 and the guide ring 205. This avoids the situation where the push ring 302 deflects when the sealing member 7 moves up and down because the diameter of the guide rod 701 is much smaller than the inner diameter of the feed pipe 2 channel, which would prevent the sealing member 7 from moving up and down smoothly.

[0037] In the initial state of this invention, the top end of the guide rod 701 is inserted into the guide ring 205, and the top end of the guide rod 701 is flush with the top end of the guide ring 205. When the sealing member 7 is attached to the feeding pipe 2 for sealing, the top end of the guide rod 701 is located above the guide ring 205. This allows the feeding pipe 2 to penetrate deep into the soil and then move upward in the reverse spiral direction through the drive mechanism 5. As a result, the feeding pipe 2 and the sealing member 7 are reset and separated, thereby causing the guide rod 701 to disturb the slow-release fertilizer in the feeding pipe 2, thus preventing the slow-release fertilizer from becoming blocked at the guide ring 205 and the push ring 302.

[0038] In this invention, the drive mechanism 5 includes a drive motor 501 disposed in the drive support box 4, a first helical gear 502 disposed at one end of the output shaft of the drive motor 501, and a second helical gear 503 disposed at the upper end of the circumferential side wall of the feed tube 2, wherein the first helical gear 502 and the second helical gear 503 mesh and match.

[0039] In this invention, the drive support box 4 is used to install the drive motor 501, and the first helical gear 502 and the second helical gear 503 are both located inside the drive support box 4. The tail of the drive motor 501 extends to the outside of the drive support box 4, and a start switch is provided on its tail. The start switch can select forward and reverse rotation. When in use, the drive motor 501 drives the first helical gear 502 to rotate. Through the meshing between the first helical gear 502 and the second helical gear 503, the feed pipe 2 is driven to rotate, thereby causing the spiral blade 201 to rotate and drill into the soil.

[0040] In this invention, the depth support frame 6 includes a main support 601 disposed at the bottom of the drive support box 4, a telescopic frame 8 movably disposed on the main support 601, and a locking bolt 602 disposed on the telescopic frame 8. The main support 601 is provided with a plurality of positioning holes 603 arranged in an array, and the positioning holes 603 and the locking bolt 602 are matched by insertion.

[0041] In this invention, the position of the bottom of the telescopic frame 8 is adjusted according to the fertilization requirements, so that after the feed pipe 2 penetrates into the soil to a certain depth with the spiral blade 201, the bottom of the telescopic frame 8 touches the ground, thereby preventing the feed pipe 2 and the spiral blade 201 from penetrating further downward, so that the feed pipe 2 reaches the set soil depth position. The main support 601 is provided with the corresponding scale for adjusting the telescopic frame 8 (not shown in the figure). Then, the drive motor 501 rotates in the opposite direction, thereby separating the sealing head 702 and the bottom of the feed pipe 2 to form an initial state gap. The slow-release fertilizer in the fertilizer box 1 falls into the deep soil through the initial state gap to achieve targeted fertilization.

[0042] In this invention, the telescopic frame 8 includes a movable sleeve 801 movably sleeved on the main support 601, a vertical plate 802 movably inserted into the movable sleeve 801, a horizontal plate 803 disposed in the middle section of one side of the vertical plate 802, a stabilizing plate 804 disposed at the lower end of the vertical plate 802, and an elastic component 9 disposed between the horizontal plate 803 and the movable sleeve 801. The design of the elastic component 9 allows the initial position of the telescopic frame 8 to be below the bottom end of the feeding pipe 2 when adjusting the position of the bottom end. After the feeding pipe 2 penetrates into the soil, its elastic compressive force allows the bottom end of the telescopic frame 8 to move upward to above the bottom end of the feeding pipe 2. When the telescopic frame 8 moves upward to above the bottom end of the feeding pipe 2 and the elastic component 9 can no longer be compressed, the feeding pipe 2 reaches a set depth layer. The position where the bottom end of the telescopic frame 8 moves upward to above the feeding plug mechanism 3 and the elastic component 9 can no longer be compressed is set as A. The distance between the bottom of the feeding pipe 2 and A is the set fertilization depth.

[0043] In this invention, the movable sleeve 801 moves the horizontal plate 803 upward via the elastic component 9, thereby moving the vertical plate 802 upward. This causes the stabilizing plate 804 on the vertical plate 802 to move to a position flush with the bottom of the feeding pipe 2. This position is the set position of the telescopic frame 8 for the maximum fertilization depth of the feeding pipe 2. Since the compressible length of the elastic component 9 is fixed, when the stabilizing plate 804 moves upward and is compressed to the point where the elastic component 9 can no longer be compressed, the distance between the stabilizing plate 804 and the bottom of the feeding pipe 2 is the set depth. Based on this, when adjusting, the movable sleeve 801 moves downward, which will cause the stabilizing plate 804 to move downward. That is, when adjusting to a fertilization depth less than the maximum depth, the stabilizing plate 804 is always located below the bottom of the feeding pipe 2. As the movable sleeve 801 moves downward, when the stabilizing plate 804 moves upward to a position where the elastic component 9 can no longer be compressed, the distance between the stabilizing plate 804 and the bottom of the feeding pipe 2 decreases, thereby adjusting the soil drilling and fertilization depth.

[0044] In this invention, since the stabilizing plate 804 is flush with the bottom of the feeding pipe 2 when the maximum fertilization depth is set, the stabilizing plate 804 of the annular array is in contact with the ground when the feeding pipe 2 is drilled into the ground with the spiral blade 201. Its reaction force prevents the handheld device from tilting left and right, and ensures that the feeding pipe 2 drills vertically downward into the soil to the set depth layer as much as possible.

[0045] In this invention, without the design of the elastic component 9, the stabilizing plate 804 needs to be located above the bottom of the feeding pipe 2 before the feeding pipe 2 is inserted into the soil. This would make it impossible to stabilize the handheld device, causing the device to tilt when it is in operation. Tilting into the soil will first cause deviation in the fertilization depth, then deviation in the fertilization position, and even more seriously, it may cause the surrounding soil to be turned up.

[0046] In this invention, the elastic component 9 includes a limiting rod 901 disposed at the bottom end of the movable sleeve 801, a stabilizing spring 902 sleeved on the limiting rod 901, and a retaining ring 903 disposed at the lower end of the limiting rod 901. The top end of the limiting rod 901 is fixedly connected to the bottom end of the movable sleeve 801. Two limiting rods 901 are provided. The lower end of the limiting rod 901 extends through the horizontal plate 803 to its lower end. The retaining ring 903 is disposed below the horizontal plate 803 and fixedly connected to the lower end of the limiting rod 901. The two ends of the stabilizing spring 902 abut against the bottom of the movable sleeve 801 and the top end of the horizontal plate 803, respectively. In the initial state, the stabilizing spring 902 is in a slightly compressed state, and it abuts against the movable sleeve 801 away from the horizontal plate 803, thereby causing the retaining ring 903 to abut against the bottom end of the horizontal plate 803.

[0047] In this invention, during operation, when the feed pipe 2 drills into the ground along with the spiral blade 201, the stabilizing plate 804 is resisted by soil clods and moves upward, thereby driving the horizontal plate 803 on the vertical plate 802 to move upward. This causes the horizontal plate 803 to push and compress the pressure-stabilizing spring 902. The rebound force of the pressure-stabilizing spring 902 also acts on the horizontal plate 803. Through the vertical plate 802, the stabilizing plate 804 is pressed tightly against the ground. Then, under the action of multiple sets of stabilizing plates 804 in a ring array, the equipment becomes stable. It should be noted that the rebound force of the pressure-stabilizing spring 902 is within the controllable range of human operation.

[0048] In this invention, the movable sleeve 801 is provided with a first movable groove 805 and a second movable groove 806. The first movable groove 805 is matched and inserted into the main support 601, and the second movable groove 806 is matched and inserted into the vertical plate 802. The horizontal plate 803 is provided with a limiting groove 807 and a guide groove 808. The limiting groove 807 is matched and inserted into the limiting rod 901, and the guide groove 808 is matched and inserted into the main support 601. The locking bolt 602 is threadedly installed on one side of the movable sleeve 801, and one end of the locking bolt 602 is threaded through the movable sleeve 801 and extends into the first movable groove 805, thereby connecting with the main support 601. The positioning hole 603 on the upper plate is used for docking and positioning. The upright plate 802 achieves double sliding limit with the main support 601 through the guide groove 808 on the horizontal plate 803 and the first movable groove 805 on the movable sleeve 801. At the same time, the upright plate 802 is slidably limited by the second movable groove 806 on the movable sleeve 801, which avoids the situation where the upright plate 802 is limited only by the guide groove 808 on the horizontal plate 803. When the stabilizing plate 804 touches the ground, the upright plate 802 will fall to the side. If the side falls too much, it will easily cause the horizontal plate 803 to deform, which will affect the telescopic adjustment between the telescopic frame 8 and the main support 601.

[0049] In this invention, a miniature electric ball valve 10 is provided at the upper end of the feed pipe 2, and a handle 11 is provided on the circumferential side wall of the drive support box 4. A switch electrically connected to the miniature electric ball valve 10 is provided on the handle 11.

[0050] In this invention, the fertilizer box 1 is first filled with the required slow-release fertilizer. Then, the fertilization depth is adjusted according to the soil fertilization needs. The movable sleeve 801 is moved to the corresponding mark on the main support 601. Then, the locking bolt 602 is tightened into the first movable groove 805 and aligns with the positioning hole 603 on the main support 601. Then, the discharge plug mechanism 3 at the bottom of the discharge pipe 2 is brought to the ground. The discharge plug mechanism 3 cannot move down after touching the ground. At this time, the discharge pipe 2 is pressed down. As the discharge pipe 2 is pressed down, the cone-shaped sealing of the discharge plug mechanism 3 is achieved. As the resistance of the sealing head 702 inserting into the soil gradually exceeds the elastic force of the downward spring 301, the sealing head 702 moves upward until the guide surface 703 on the sealing head 702 fits against the matching surface 203 of the corresponding discharge pipe 2. This seals the channel before the discharge pipe 2 penetrates into the soil, preventing soil from entering the channel of the discharge pipe 2 and causing blockage. Then, the drive motor 501 is started, driving the first helical gear 502 to mesh with the second helical gear 502. 03 drives the feed pipe 2 to rotate, causing the conical end of the spiral blade 201 to drill into the soil and penetrate deeper into the soil layer. This causes the feed pipe 2 and the sealing component 7 to penetrate deeper into the ground. As the feed pipe 2 penetrates deeper into the ground along with the spiral blade 201, the stabilizing plate 804 contacts the ground, causing the horizontal plate 803 to move upwards and compress the pressure-stabilizing spring 902. The reaction force of the pressure-stabilizing spring 902 pushes the stabilizing plate 804 against the ground, giving the equipment good stability. When the pressure-stabilizing spring 902 is compressed to an incompressible state, that is, when the feed begins to flow... When pipe 2 reaches the set depth, the drive motor 501 reverses, causing the feeding pipe 2 and the spiral blade 201 to move upwards gradually through the spiral path. As the feeding pipe 2 moves upwards, the sealing head 702 gradually separates from the bottom of the feeding pipe 2, thus forming an initial gap. At this time, the micro electric ball valve 10 is opened by the switch on the handle, allowing the slow-release fertilizer in the fertilizer box 1 to fall through the feeding pipe 2. Then, the slow-release fertilizer is applied through the initial gap between the feeding pipe 2 and the sealing part 7, thereby realizing the deep targeted injection of slow-release fertilizer.

[0051] In the foregoing, whenever a fixed connection is mentioned, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deep soil targeted injection slow-release fertilizer applicator, characterized in that: The application relates to a fertilizer box, a discharging pipe communicated with the fertilizer box and a discharging plug mechanism arranged on the discharging pipe, wherein helical blades and a driving support box are arranged on the discharging pipe, the driving support box is rotationally connected with the discharging pipe, a driving mechanism for driving the discharging pipe to rotate is arranged in the driving support box, the fertilizer box is arranged at the top end of the driving support box, a plurality of depth support frames are arranged on the driving support box, an embedded groove is formed in the discharging pipe, the discharging plug mechanism comprises a pressing spring arranged in the embedded groove, a pushing ring arranged at the lower end of the pressing spring and a sealing element connected with the pushing ring, a connecting rod is arranged in the pushing ring and fixedly connected with the sealing element, the sealing element comprises a guide rod fixedly connected with one end of the connecting rod and a sealing head arranged at the bottom of the guide rod, the sealing head is conically arranged, a guide surface is arranged at the end of the sealing head away from the tip end, and a matching surface corresponding to the guide surface is arranged at the lower end of the inner wall of the discharging pipe.

2. The deep soil targeted injection slow-release fertilizer applicator according to claim 1, characterized in that: A supporting rod is arranged on the inner wall of the lower end of the discharging pipe, a guide ring is arranged on the supporting rod, and the guide ring is movably inserted with the guide rod.

3. The deep soil targeted injection slow-release fertilizer applicator according to claim 2, characterized in that: The driving mechanism comprises a driving motor arranged in the driving support box, a first helical gear connected with the driving motor and a second helical gear arranged in the discharging pipe, and the first helical gear is meshingly connected with the second helical gear.

4. The deep soil targeted injection slow-release fertilizer applicator according to claim 3, characterized in that: The depth support frame comprises a main support arranged in the driving support box, a telescopic frame movably arranged on the main support and a locking bolt arranged on the telescopic frame, a plurality of positioning holes are formed in the main support, and the positioning holes are insertedly matched with the locking bolt.

5. The deep soil targeted injection slow-release fertilizer applicator according to claim 4, characterized in that: The telescopic frame comprises a movable sleeve movably sleeved on the main support, a vertical plate movably inserted with the movable sleeve, a horizontal plate arranged at the middle section of one side of the vertical plate, a stabilizing plate arranged at the lower end of the vertical plate and an elastic assembly arranged between the horizontal plate and the movable sleeve.

6. The deep soil targeted injection slow-release fertilizer applicator according to claim 5, characterized in that: The elastic assembly comprises a limiting rod arranged at the bottom end of the movable sleeve, a stabilizing spring sleeved on the limiting rod and a blocking ring arranged on the limiting rod.

7. The deep soil targeted injection slow-release fertilizer applicator according to claim 6, characterized in that: First and second movable grooves are formed in the movable sleeve, the first movable groove is insertedly matched with the main support, the second movable groove is insertedly matched with the vertical plate, a limiting groove and a guide groove are formed in the horizontal plate, the limiting groove is insertedly matched with the limiting rod, and the guide groove is insertedly matched with the main support.

8. The deep soil targeted injection slow-release fertilizer applicator according to claim 7, characterized in that: A micro electric ball valve is arranged at the upper end of the discharging pipe, a handle is arranged on the driving support box, and a switch electrically connected with the micro electric ball valve is arranged on the handle.

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