An electric fertilizer applying tool with adjustable fertilizer application amount

Abstract

The present application relates to the field of fertilization, in particular to a kind of electric fertilization tool with adjustable fertilization amount.It includes frame, blowing mechanism, bellows and support rod, frame is provided with fertilizer box and quantitative fertilizer feeding cylinder, the bottom of fertilizer box is provided with feeding wheel, feeding wheel is configured to uniformly transport fertilizer in fertilizer box to quantitative fertilizer feeding cylinder, and the bottom of quantitative fertilizer feeding cylinder is provided with a discharge opening;Blowing mechanism is configured to blow air into the inside of quantitative fertilizer feeding cylinder at intervals to open the discharge opening;Bellows is connected at the bottom of quantitative fertilizer feeding cylinder, support rod is slidably arranged on frame and can rotate, support rod is located at the bottom of bellows and cooperates with bellows stop.The blowing capacity of blowing mechanism is used to make bellows elongate and drive support rod to move down, support rod is positioned by being driven into soil, and during the travel of frame, under the action of soil resistance, support rod rotates, so that fertilization point is not moved with frame in a short time, ensure that fertilization is in heap, and improve the accuracy of hole fertilization.

Description

Technical Field

[0001] This invention relates to the field of fertilization, and more specifically to an electric fertilization tool with adjustable fertilization rate. Background Technology

[0002] Applying chemical fertilizers is the fastest and most effective way to increase crop yields. Insufficient fertilizer application will lead to insufficient plant nutrition, while excessive fertilizer application will burn seedlings and waste fertilizer. Rational application of chemical fertilizers can improve fertilizer utilization, reduce fertilizer application, thereby improving economic benefits, reducing environmental pollution, and achieving sustainable agricultural development.

[0003] With the development of agricultural technology, precision fertilization technology has emerged, also known as spot fertilization, hole fertilization, or hill fertilization. A high-speed precision seeder moves the base fertilizer to a centralized fertilizer control valve. The system sets the fertilizer application rate, triggering the valve to achieve spot fertilization. Spot fertilization is precise, saves fertilizer, and effectively targets nutrient release to the crop one-to-one, thus achieving high yields.

[0004] Currently, the fertilizer control valves used in spot fertilization include solenoid valves, mechanical valves, and pneumatic valves. Pneumatic valves use high-pressure gas to blow open the sealed rubber diaphragm, and at the same time, the high-pressure airflow increases the speed at which the fertilizer falls, making the fertilizer pile up better and increasing the fertilization effect. However, pneumatic valves cannot apply large amounts of fertilizer at a time. If the amount of fertilizer applied at one time is too large, the fertilizer takes a certain amount of time to fall, resulting in the fertilizer on the ground forming strips rather than clumps, which leads to poor fertilization effect and narrows the application range of fertilization equipment.

[0005] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes an electric fertilizer applicator with adjustable fertilizer application rate, thereby solving the problem of poor hole-applying effect of existing fertilizer applicators.

[0007] The present invention provides an electric fertilizer applicator with adjustable fertilizer application rate, which adopts the following technical solution: a frame, on which a fertilizer box and a quantitative fertilizer delivery cylinder are provided. The quantitative fertilizer delivery cylinder is located below the fertilizer box and is connected to the fertilizer box through a feeding pipe. A feeding wheel is provided at the bottom of the fertilizer box. The feeding wheel is configured to uniformly transport the fertilizer in the fertilizer box to the quantitative fertilizer delivery cylinder. A discharge port is provided at the bottom of the quantitative fertilizer delivery cylinder. The discharge port is initially in a closed state.

[0008] The air blowing mechanism is configured to blow air into the quantitative fertilizer feeding cylinder at intervals to open the material discharge port;

[0009] A corrugated pipe is connected to the bottom of the quantitative fertilizer delivery cylinder and communicates with the material discharge port.

[0010] The support rod is mounted on the frame and can slide up and down and rotate. The support rod is located at the bottom of the bellows and cooperates with the bellows stop. A first elastic element and a second elastic element are provided between the support rod and the frame. The first elastic element makes the support rod tend to be in the upper limit position, and the second elastic element makes the support rod tend to be in a vertical state.

[0011] Optionally, the outer circumferential surface of the feeding wheel is provided with several circumferentially distributed feeding grooves, the bottom of the fertilizer box has a limiting part, the limiting part is adapted to the feeding wheel, and the rotation speed of the feeding wheel is controlled by a motor.

[0012] Optionally, the bottom of the quantitative fertilizer delivery cylinder has an elastic cone with the small end facing downwards. The elastic cone is made of elastic rubber or other materials, and the discharge port is located at the tip of the elastic cone.

[0013] Optionally, the output end of the blowing mechanism is connected to a blowing pipe that extends into the metering fertilizer delivery cylinder and is close to the tip of the elastic cone.

[0014] Optionally, an extended conveying pipe is connected to the bottom of the corrugated pipe. The extended conveying pipe is located inside the support rod and extends to a preset position above the bottom of the support rod. A first discharge port is formed inside the extended conveying pipe.

[0015] The electric fertilizer applicator with adjustable fertilizer application rate also includes an adjustment mechanism, which is configured to adjust the flow area of ​​the first discharge port according to the looseness of the soil, and to make the flow area of ​​the first discharge port negatively correlated with the looseness of the soil.

[0016] Optionally, the adjustment mechanism includes an adjustment block, an adjustment plate, an elastic locking structure, and an adjustment rod;

[0017] The adjusting block is slidably inserted into the extended conveying pipe in the front-to-back direction, with the front end of the adjusting block inside the extended conveying pipe and the rear end outside the extended conveying pipe. The adjusting block is provided with a second discharge port. A third elastic element is provided between the adjusting block and the extended conveying pipe. The third elastic element makes the adjusting block tend to move into the extended conveying pipe. When the adjusting block is inserted to the limit position, the first discharge port and the second discharge port are aligned.

[0018] The extended feed pipe can move synchronously with the support rod. The adjusting plate is slidably sleeved on the outside of the support rod and connected to the adjusting block. The elastic locking structure is set on the support rod. The elastic locking structure is configured to prevent the adjusting plate from moving relative to the support rod in the direction of the vehicle frame when it is active.

[0019] The adjusting rod is set on the frame and located below the front end of the adjusting plate. The adjusting rod is an elastic telescopic rod. A cylindrical locking post is set at the top of the adjusting rod. A locking groove is set at the front end of the adjusting plate. The locking groove can engage with the locking post and can rotate relative to the locking post. When the locking groove and the locking post are engaged and the support rod returns to the vertical direction, the locking groove and the locking post stop.

[0020] Optionally, the elastic locking structure includes a limiting plate and a fourth elastic element. The limiting plate is located above the adjusting plate and can slide on the supporting rod along the extension direction of the supporting rod. The limiting plate and the adjusting plate are respectively provided with mutually compatible one-way locking teeth and one-way locking grooves on their facing sides. The fourth elastic element is disposed between the limiting plate and the supporting rod and has a tendency to move the limiting plate closer to the adjusting plate, thereby making the limiting plate and the adjusting plate engage.

[0021] Optionally, the third elastic element is a tension spring and the fourth elastic element is a compression spring.

[0022] Optionally, the first elastic element is a tension spring, and the second elastic element is a torsion spring.

[0023] Optionally, the bottom of the support rod is provided with a pointed tip.

[0024] The beneficial effects of this invention are as follows: The electric fertilizer applicator with adjustable fertilizer application rate of this invention has a corrugated pipe at the lower end of the quantitative fertilizer delivery cylinder, and a support rod that can slide up and down and rotate at the lower end of the corrugated pipe. During fertilization, the air blowing capacity of the air blowing mechanism causes the corrugated pipe to extend and drive the support rod to move down. The support rod is driven into the soil for positioning. During the movement of the vehicle frame, the support rod rotates under the action of soil resistance, so that the fertilizer application point does not move with the vehicle frame in a short period of time, ensuring that the fertilizer is piled up and improving the accuracy of hole fertilization.

[0025] Furthermore, an extended conveying pipe is connected to the bottom of the corrugated pipe, and a first discharge port is formed inside the extended conveying pipe. The flow area of ​​the first discharge port is adjusted by an adjustment mechanism. When the soil is relatively loose, the flow area of ​​the first discharge port is reduced. When the air blowing mechanism blows air, the pressure holding capacity inside the corrugated pipe is strong, the air pressure inside the corrugated pipe is high, the corrugated pipe can extend a longer distance, and the support rod can move a longer distance under the drive of the corrugated pipe. The support rod can be inserted into the soil more deeply, which enhances the support and positioning ability of the support rod and prevents the support rod from returning to its original position too early during the movement of the vehicle frame. This improves the effect of hole fertilization under the working conditions of cultivating loose soil. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of an electric fertilizer applicator with adjustable fertilizer application rate according to the present invention.

[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 This is a side view of an electric fertilizer applicator with adjustable fertilizer application rate according to the present invention.

[0030] Figure 4 for Figure 3 Enlarged view at point B in the middle;

[0031] Figure 5 This is a top view of an electric fertilizer applicator with adjustable fertilizer application rate according to the present invention.

[0032] Figure 6 for Figure 5 CC section view;

[0033] Figure 7 for Figure 6 Enlarged view of point D in the middle.

[0034] In the picture:

[0035] 101. Frame; 102. Fertilizer bin; 1021. Limiting part; 103. Feeding wheel; 104. Air blowing mechanism; 105. Air blowing pipe; 106. Quantitative fertilizer feeding cylinder; 1061. Feeding pipe; 1062. Elastic cone; 107. Corrugated pipe; 108. Support rod; 1081. Hinge shaft; 109. Second elastic element; 110. First elastic element; 111. Adjusting plate; 1111. Slot; 112. Limiting plate; 1121. Fourth elastic element; 113. Adjusting rod; 1131. Locking post; 114. Extended conveying pipe; 1141. Adjusting pipe; 1142. First discharge port; 116. Adjusting block; 1161. Third elastic element; 1162. Second discharge port. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figures 1 to 7 As shown, an electric fertilizer applicator with adjustable fertilizer application rate provided in this embodiment of the invention includes a frame 101, an air blowing mechanism 104, a corrugated pipe 107, and a support rod 108.

[0038] The frame 101 is equipped with a fertilizer box 102 and a quantitative fertilizer delivery cylinder 106. The quantitative fertilizer delivery cylinder 106 is located below the fertilizer box 102 and is connected to the fertilizer box 102 through a feeding pipe 1061. A feeding wheel 103 is provided at the bottom of the fertilizer box 102. The feeding wheel 103 is configured to uniformly transport the fertilizer in the fertilizer box 102 to the quantitative fertilizer delivery cylinder 106. A discharge port is provided at the bottom of the quantitative fertilizer delivery cylinder 106. The discharge port is initially closed.

[0039] The air blowing mechanism 104 is configured to blow air into the quantitative fertilizer feeding cylinder 106 at intervals to open the material discharge port;

[0040] The corrugated pipe 107 is connected to the bottom of the quantitative fertilizer delivery cylinder 106 and communicates with the material discharge port;

[0041] The support rod 108 is slidably and rotatably mounted on the frame 101. The support rod 108 is located at the bottom of the bellows 107 and cooperates with the stop of the bellows 107. A first elastic element 110 and a second elastic element 109 are provided between the support rod 108 and the frame 101. The first elastic element 110 tends to position the support rod 108 at its upper limit position, and the second elastic element 109 tends to position the support rod 108 in a vertical state. The bottom of the support rod 108 is provided with a pointed tip to facilitate penetration into the soil.

[0042] It is understandable that when existing fertilization tools are used for hole fertilization, because the frame 101 is in motion, if the speed is too fast or the amount of fertilizer applied is too large, the fertilizer takes a certain amount of time to descend, which will cause the fertilizer to be in strips instead of a pile, thus affecting the effectiveness of hole fertilization.

[0043] In an embodiment of the present invention, during operation, the frame 101 is controlled to travel along a predetermined route. Fertilizer is stored in the fertilizer box 102, and the feeding wheel 103 evenly transports the fertilizer in the fertilizer box 102 to the quantitative fertilizer delivery cylinder 106. Then, according to the seed row spacing and the traveling speed of the frame 101, the blowing mechanism 104 is controlled to spray air intermittently, opening the discharge port at the bottom of the quantitative fertilizer delivery cylinder 106. The fertilizer falls into the soil through the discharge port, the corrugated pipe 107, and the support rod 108, so that fertilizer can be applied to each seed hole, increasing fertilizer utilization rate.

[0044] Initially, the support rod 108 is at its upper limit position and a preset distance from the ground to avoid affecting the movement of the frame 101. During fertilization, when the blowing mechanism 104 sprays high-pressure gas into the quantitative fertilizer delivery cylinder 106, the gas enters the corrugated pipe 107 through the discharge port, causing the corrugated pipe 107 to extend. After the corrugated pipe 107 extends, it drives the support rod 108 to move downward and penetrate into the soil. At this time, the first elastic element 110 stores force. Then, under the resistance of the soil, the lower end of the support rod 108 lags and rotates, so that the fertilizer discharge position does not move with the frame 101 for a short time, causing the fertilizer to pile up. After fertilizing one hole, the blowing mechanism 104 stops blowing air, and the support rod 108 returns to its original position under the action of the first elastic element 110 and returns to the vertical state under the action of the second elastic element 109.

[0045] In this embodiment, a support rod 108 that can slide up and down and rotate is provided. During fertilization, the support rod 108 is driven into the soil for positioning. As the vehicle frame 101 moves, the support rod 108 rotates under the action of soil resistance, so that the fertilization point does not move with the vehicle frame 101 in a short period of time, ensuring that the fertilizer is piled up and improving the accuracy of hole fertilization.

[0046] Furthermore, to facilitate the control and adjustment of fertilizer application, several circumferentially distributed feeding grooves are provided on the outer circumferential surface of the feeding wheel 103. The bottom of the fertilizer box 102 has a limiting part 1021, which is adapted to the feeding wheel 103. When the feeding wheel 103 rotates, the fertilizer is evenly fed to the quantitative fertilizer delivery cylinder 106 through the feeding grooves. The air blowing mechanism 104 blows air at set intervals to deliver the fertilizer in the quantitative fertilizer delivery cylinder 106 to the soil.

[0047] The rotational speed of the feeding wheel 103 is controlled by a motor. The feeding speed is adjusted by adjusting the rotational speed of the feeding wheel 103, thereby changing the amount of fertilizer applied.

[0048] Furthermore, to facilitate the setting of the discharge port, in a preferred embodiment of the present invention, the bottom of the quantitative fertilizer feeding cylinder 106 has an elastic cone 1062 with the small end facing downward. The elastic cone 1062 is made of elastic rubber or other materials. The discharge port is set at the tip of the elastic cone 1062. The air blowing mechanism 104 blows air into the quantitative fertilizer feeding cylinder 106, causing the elastic cone 1062 to deform and thus open the discharge port.

[0049] The output end of the air blowing mechanism 104 is connected to an air blowing pipe 105, which extends into the quantitative fertilizer delivery cylinder 106 and is close to the tip of the elastic cone 1062, making it easy to open the discharge port.

[0050] To facilitate the connection between the corrugated pipe 107 and the quantitative fertilizer delivery cylinder 106, a tapered connector is provided at the top of the corrugated pipe 107. The tapered connector is connected to the quantitative fertilizer delivery cylinder 106 and covers the outside of the bottom of the elastic cone 1062.

[0051] In a further embodiment, the frame 101 is provided with a vertically extending guide groove, and a slider is provided in the guide groove. The slider can slide up and down along the guide groove. One end of the slider is provided with a hinge shaft 1081. A connecting block is provided on one side of the support rod 108. The hinge shaft 1081 is inserted into the connecting block and rotatably connected to the connecting block. The upper end of the first elastic member 110 is fixed to the frame 101 and the lower end is connected to the connecting block. The second elastic member 109 is provided between the hinge shaft 1081 and the connecting block. Preferably, the first elastic member 110 is a tension spring and the second elastic member 109 is a torsion spring.

[0052] In a further embodiment, the bottom of the corrugated pipe 107 is connected to an extended conveying pipe 114. The extended conveying pipe 114 is disposed inside the support rod 108 and extends to a preset position above the bottom of the support rod 108 to facilitate guiding fertilizer to the ground. A first discharge port 1142 is formed inside the extended conveying pipe 114. The electric fertilizer applicator with adjustable fertilizer application of the present invention also includes an adjustment mechanism. The adjustment mechanism is configured to adjust the flow area of ​​the first discharge port 1142 according to the looseness of the soil, and to make the flow area of ​​the first discharge port 1142 negatively correlated with the looseness of the soil.

[0053] In this embodiment, by setting the first discharge port 1142 and the adjustment mechanism, when the soil is relatively loose, the flow area of ​​the first discharge port 1142 is reduced. When the air blowing mechanism 104 blows air, the pressure holding capacity inside the corrugated pipe 107 is stronger, the air pressure inside the corrugated pipe 107 is larger, the corrugated pipe 107 can extend a longer distance, and the support rod 108 can move a longer distance under the drive of the corrugated pipe 107. The support rod 108 can be inserted into the soil more deeply, which enhances the support and positioning ability of the support rod 108 and avoids the support rod 108 returning to its original position too early during the movement of the frame 101, thereby improving the effect of hole fertilization under the working conditions of cultivating loose soil.

[0054] In a further embodiment, the adjustment mechanism includes an adjustment block 116, an adjustment plate 111, an elastic locking structure, and an adjustment rod 113;

[0055] The adjusting block 116 is slidably inserted into the extended feed tube 114 in the front-to-back direction, with the front end of the adjusting block 116 located inside the extended feed tube 114 and the rear end located outside the extended feed tube 114 (the forward direction of the frame 101 is forward, and the reverse is backward). The adjusting block 116 is provided with a second discharge port 1162. A third elastic element 1161 is provided between the adjusting block 116 and the extended feed tube 114. The third elastic element 1161 causes the adjusting block 116 to tend to move into the extended feed tube 114. When the adjusting block 116 is inserted to the limit position, the first discharge port 1142 and the second discharge port 1162 are aligned. The third elastic element 1161 is preferably a tension spring.

[0056] The extended feed pipe 114 can move synchronously with the support rod 108. The adjusting plate 111 is slidably sleeved on the outside of the support rod 108 and connected to the adjusting block 116. The elastic locking structure is provided on the support rod 108. The elastic locking structure is configured to prevent the adjusting plate 111 from moving relative to the support rod 108 in the direction of the vehicle frame 101 when it is activated.

[0057] The adjusting rod 113 is set on the frame 101 and located below the front end of the adjusting plate 111. The adjusting rod 113 is an elastic telescopic rod. Initially, the adjusting rod 113 and the adjusting plate 111 have a set interval. A cylindrical locking post 1131 is provided at the top of the adjusting rod 113. A locking groove 1111 is provided at the front end of the adjusting plate 111. The locking groove 1111 can engage with the locking post 1131 and can rotate relative to the locking post 1131. When the locking groove 1111 and the locking post 1131 are engaged and the support rod 108 returns to the vertical direction, the locking groove 1111 and the locking post 1131 stop.

[0058] When the air blowing mechanism 104 blows air into the quantitative fertilizer delivery cylinder 106, the corrugated pipe 107 extends and drives the support rod 108 to move downward and penetrate into the soil. The adjusting plate 111 moves downward synchronously with the support rod 108 and compresses the adjusting rod 113. When the frame 101 moves forward, the bottom of the support rod 108 is resisted by the soil and rotates, causing the slot 1111 to engage with the locking post 1131. If the soil is loose, the soil will not provide enough resistance to the support rod 108, causing the support rod 108 to rotate and reset while inserted into the soil. This will cause the adjusting plate 111 to rotate synchronously. At this time, because the slot 1111 on the adjusting plate 111 engages with the pin 1131 on the adjusting rod 113, the adjusting plate 111 is stopped by the support pin and overcomes the resistance of the elastic locking structure, sliding backward relative to the support rod 108. When the adjusting plate 111 slides backward, it causes the adjusting block 116 to slide backward synchronously. The first discharge port 1142 and the second discharge port 1162 are misaligned. Under the obstruction of the adjusting block 116, the flow area of ​​the first discharge port 1142 is reduced, and the pressure holding capacity of the corrugated pipe 107 is enhanced. During the next air blowing process, the corrugated pipe 107 elongates under air pressure, the support rod 108 moves downward a greater distance, and the length of penetration into the soil increases, thereby improving the support capacity of the support rod 108. In hard soil, the amount of downward movement of the support rod 108 is controlled to prevent soil blockage of the bottom opening of the extended conveying pipe 114.

[0059] In a further embodiment, the elastic locking structure includes a limiting plate 112 and a fourth elastic member 1121. The limiting plate 112 is located above the adjusting plate 111. The limiting plate 112 can be slidably disposed on the supporting rod 108 along the extension direction of the supporting rod 108. The limiting plate 112 and the adjusting plate 111 are respectively provided with mutually compatible one-way locking teeth and one-way locking grooves 1111 on their facing sides. The fourth elastic member 1121 is disposed between the limiting plate 112 and the supporting rod 108. The fourth elastic member 1121 has a tendency to make the limiting plate 112 move closer to the adjusting plate 111, thereby making the limiting plate 112 and the adjusting plate 111 engage.

[0060] When the support plate rotates to its reset position while inserted into the soil, the adjusting plate 111 rotates synchronously with the support plate. Under the stop of the locking post 1131 on the adjusting rod 113, the adjusting plate 111 overcomes the elastic force of the fourth elastic element 1121, lifting the limiting plate 112 and moving it backward relative to the support rod 108. The adjusting plate 111 drives the adjusting block 116 to move backward, reducing the flow area of ​​the first discharge port 1142. Then, under the action of the fourth elastic element 1121, the limiting plate 112 locks the position of the adjusting plate 111. When the air blowing mechanism 104 blows air again, the length of the support rod 108 inserted into the soil increases. Preferably, the fourth elastic element 1121 is a compression spring.

[0061] Understandably, in the initial state, the first discharge port 1142 maintains the maximum flow area. During the tillage and fertilization process, the flow area of ​​the first discharge port is automatically adjusted according to the soil's looseness, ensuring that the support rod 108 penetrates the soil to the appropriate length, thus ensuring the effectiveness of hole fertilization. Typically, the soil quality in the same area is relatively similar. After tilling one area, the limit plate 112 is manually raised, and the adjusting plate 111 is reset forward to continue tilling another area.

[0062] In a further embodiment, refer to Figure 7 To facilitate the setting of the first discharge port 1142, the extended conveying pipe 114 includes two main bodies and an adjusting pipe 1141 connected between the two main bodies. The first discharge port 1142 is formed inside the adjusting pipe 1141. The adjusting block 116 is inserted into the adjusting pipe 1141. The middle part of the adjusting pipe 1141 is square in shape, which facilitates fixing with the support rod 108 and also facilitates the installation of the adjusting block 116 and the third elastic member 1161.

[0063] In a further embodiment, the frame 101 may also be equipped with a seeding mechanism to realize integrated seeding and fertilization operations.

[0064] Based on the above embodiments, the usage principle and working process of the present invention are as follows:

[0065] When the work begins, the feeding wheel 103 rotates, feeding fertilizer evenly into the quantitative fertilizer feeding cylinder 106. The feeding wheel 103 is controlled by a motor to adjust the speed and feed the appropriate amount as needed. The air blowing mechanism 104 sprays air according to the seed row spacing and the traveling speed of the frame 101, so that fertilizer can be applied to each seed hole, increasing fertilizer utilization.

[0066] After high-pressure gas is ejected from the air pipe 105, the corrugated pipe 107 extends, causing the support rod 108 to move downward. After the support rod 108 moves downward, it penetrates the soil and pulls the first elastic element 110, compressing the adjusting rod 113. As the frame 101 continues to move forward, the support rod 108 rotates due to the resistance of the soil, so that the fertilizer drop position does not move with the vehicle for a short time, causing the fertilizer to pile up and improving the effect of hole fertilization. At this time, the slot 1111 on the adjusting plate 111 engages with the pin 1131 at the top of the adjusting rod 113.

[0067] When the soil is relatively loose, the soil provides insufficient resistance to the support rod 108, causing the support rod 108 to reset in its extended state. When the support rod 108 rotates to reset, it drives the adjusting plate 111 to rotate synchronously. At this time, because the slot 1111 of the adjusting plate 111 engages with the pin 1131 on the fixed adjusting rod 113, the adjusting plate 111 moves backward relative to the support rod 108 under the stopping action of the pin 1131, and drives the adjusting block 116 to move backward synchronously. The first discharge port 1142 and the second discharge port 1162 are misaligned. Under the blocking action of the adjusting block 116, the flow area of ​​the first discharge port 1142 is reduced. In the next air blowing process, the extension of the corrugated pipe 107 increases, and the support rod 108 moves further downward, increasing the depth into the soil. In hard soil, the amount of downward movement of the support rod 108 is controlled to avoid soil blockage of the bottom opening of the extended conveying pipe 114.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric fertilizer applicator with adjustable fertilizer application rate, characterized in that, include: The frame is equipped with a fertilizer box and a quantitative fertilizer delivery cylinder. The quantitative fertilizer delivery cylinder is located below the fertilizer box and is connected to the fertilizer box through a feeding pipe. The bottom of the fertilizer box is equipped with a feeding wheel, which is configured to evenly transport the fertilizer in the fertilizer box to the quantitative fertilizer delivery cylinder. The bottom of the quantitative fertilizer delivery cylinder is equipped with a discharge port, which is initially closed. The air blowing mechanism is configured to blow air into the quantitative fertilizer feeding cylinder at intervals to open the material discharge port; A corrugated pipe is connected to the bottom of the quantitative fertilizer delivery cylinder and communicates with the material discharge port. The support rod is mounted on the frame in a way that allows it to slide up and down and rotate. The support rod is located at the bottom of the bellows and cooperates with the bellows stop. A first elastic element and a second elastic element are provided between the support rod and the frame. The first elastic element makes the support rod tend to be in the upper limit position, and the second elastic element makes the support rod tend to be in a vertical state. The bottom of the corrugated pipe is connected to an extended conveyor pipe, which is located inside the support rod and extends to a preset position above the bottom of the support rod. A first discharge port is formed inside the extended conveyor pipe. The electric fertilizer applicator with adjustable fertilizer application rate also includes an adjustment mechanism, which is configured to adjust the flow area of ​​the first discharge port according to the looseness of the soil, and to make the flow area of ​​the first discharge port negatively correlated with the looseness of the soil. The adjustment mechanism includes an adjustment block, an adjustment plate, an elastic locking structure, and an adjustment rod; The adjusting block is slidably inserted into the extended conveying pipe in the front-to-back direction, with the front end of the adjusting block inside the extended conveying pipe and the rear end outside the extended conveying pipe. The adjusting block is provided with a second discharge port. A third elastic element is provided between the adjusting block and the extended conveying pipe. The third elastic element makes the adjusting block tend to move into the extended conveying pipe. When the adjusting block is inserted to the limit position, the first discharge port and the second discharge port are aligned. The extended feed pipe can move synchronously with the support rod. The adjusting plate is slidably sleeved on the outside of the support rod and connected to the adjusting block. The elastic locking structure is set on the support rod. The elastic locking structure is configured to prevent the adjusting plate from moving relative to the support rod in the direction of the vehicle frame when it is active. The adjusting rod is set on the frame and located below the front end of the adjusting plate. The adjusting rod is an elastic telescopic rod. A cylindrical locking post is set at the top of the adjusting rod. A locking groove is set at the front end of the adjusting plate. The locking groove can engage with the locking post and can rotate relative to the locking post. When the locking groove and the locking post are engaged and the support rod returns to the vertical direction, the locking groove and the locking post stop.

2. The electric fertilizer applicator with adjustable fertilizer application rate according to claim 1, characterized in that, The outer circumference of the feeding wheel is provided with several circumferentially distributed feeding grooves. The bottom of the fertilizer box has a limiting part that is adapted to the feeding wheel. The rotation speed of the feeding wheel is controlled by a motor.

3. The electric fertilizer applicator with adjustable fertilizer application rate according to claim 1, characterized in that, The bottom of the quantitative fertilizer delivery cylinder has an elastic cone with the small end facing downwards. The elastic cone is made of elastic rubber material, and the discharge port is located at the tip of the elastic cone.

4. The electric fertilizer applicator with adjustable fertilizer application rate according to claim 3, characterized in that, The output end of the blowing mechanism is connected to an air blowing pipe, which extends into the quantitative fertilizer delivery cylinder and is close to the tip of the elastic cone.

5. The electric fertilizer applicator with adjustable fertilizer application rate according to claim 1, characterized in that, The elastic locking structure includes a limiting plate and a fourth elastic element. The limiting plate is located above the adjusting plate and can slide along the extension direction of the supporting rod. The limiting plate and the adjusting plate are respectively provided with mutually compatible one-way locking teeth and one-way locking grooves on their facing sides. The fourth elastic element is disposed between the limiting plate and the supporting rod and has a tendency to move the limiting plate closer to the adjusting plate, thereby making the limiting plate and the adjusting plate engage.

6. The electric fertilizer applicator with adjustable fertilizer application rate according to claim 5, characterized in that, The third elastic element is a tension spring, and the fourth elastic element is a compression spring.

7. The electric fertilizer applicator with adjustable fertilizer application rate according to claim 1, characterized in that, The first elastic element is a tension spring, and the second elastic element is a torsion spring.

8. The electric fertilizer applicator with adjustable fertilizer application rate according to claim 1, characterized in that, The bottom of the support rod is equipped with a pointed tip.

Images