A dual-channel fertilization device for biogas residue and biogas slurry

Abstract

The present invention relates to the technical field of root fertilization of crops, and particularly relates to a dual-channel fertilization device for biogas residues and biogas slurry, which comprises a fertilization pipe, a piston, a first rod body and a blade group; a fertilization channel is arranged in the first rod body, the piston and the fertilization pipe cooperate to form a fertilization cavity, the blade group is arranged on the first rod body, the end of the fertilization pipe corresponding to the fertilization cavity is the first end, the first end is open, and when the first rod body is moved along the length direction of the fertilization pipe, the blade group retracted in the fertilization pipe can extend out from the first end; and when the first rod body is rotated around the central axis of the fertilization pipe, the blade group can rotate around the central axis of the fertilization pipe, and the rotated blade group is used for stirring the biogas residues and / or the soil. The dual-channel fertilization device for biogas residues and biogas slurry of the present application can avoid the accumulation of biogas residues and the phenomenon of over-fertilization of local soil at the roots of crops during the process of applying biogas fertilizer to the roots of crops using the fertilization pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of crop root fertilization, and particularly relates to a dual-channel fertilization device for biogas residue and biogas slurry. Background Art

[0002] During the process of crop planting, it is usually necessary to fertilize the crops. Currently, common fertilization methods include foliar fertilization and root fertilization. For root fertilization, the fertilizer can act on the crop roots and the soil at the root area. As the main organ for crops to absorb nutrients, the roots can improve the fertilizer utilization rate and promote root development.

[0003] Among them, biogas fertilizer is a common organic fertilizer, which includes biogas residue and biogas slurry. During the process of fertilizing crop roots, a common fertilization method is to insert a fertilization pipe into the soil, extend the outlet of the fertilization pipe to the soil at the crop root area, and then inject biogas fertilizer into the fertilization pipe, so that the biogas fertilizer is injected along the fertilization pipe onto the soil at the crop root area, and the biogas slurry seeps into the soil at the root area, so that most of the crop roots and the soil at the root area can absorb the injected biogas slurry. However, during the process of extracting biogas slurry, when the biogas slurry and biogas residue are not stratified or the biogas residue is stirred, the extracted biogas slurry can be mixed with biogas residue. When the biogas residue and biogas slurry are injected into the soil at the crop root area along the fertilization pipe together, compared with biogas slurry, the biogas residue is more difficult to penetrate into the soil gaps. When the biogas slurry and biogas residue flow to the outlet of the fertilization pipe along the fertilization pipe, the biogas slurry can continue to penetrate into the soil at the outlet of the fertilization pipe, while most of the biogas residue will accumulate at the soil at the outlet of the fertilization pipe, which will result in a large amount of biogas residue at the soil at the outlet of the fertilization pipe, easily causing the phenomenon of over-fertilization of the soil where the biogas residue accumulates, easily damaging the structure of the locally over-fertilized soil, making the soil at that place prone to hardening and caking, and at the same time easily burning the crop roots near the soil at that place.

[0004] Therefore, how to avoid the accumulation of biogas residue and the phenomenon of local soil over-fertilization at the crop roots during the process of applying biogas fertilizer to crop roots using a fertilization pipe is a technical problem that urgently needs to be solved at present. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual-channel fertilization device for biogas residue and biogas slurry to avoid the accumulation of biogas residue and the phenomenon of local soil over-fertilization at the crop roots in view of the problems of biogas residue accumulation and local soil over-fertilization at the crop roots during the process of applying biogas fertilizer to crop roots using a fertilization pipe.

[0006] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0007] A two-channel fertilizing device for biogas residue and biogas slurry, comprising a fertilizing pipe, a piston, a first rod body and a blade group. The piston fits against the inner wall of the fertilizing pipe. The first rod body is connected to the piston. When a force is applied to the first rod body along the length direction of the fertilizing pipe, the piston can move relative to the fertilizing pipe along the length direction of the fertilizing pipe.

[0008] A fertilizing channel is arranged in the first rod body. The piston and the fertilizing pipe cooperate to form a fertilizing cavity. The fertilizing channel is communicated with the fertilizing cavity. The blade group is arranged on the first rod body. The end of the fertilizing pipe corresponding to the fertilizing cavity is the first end, and the first end is in an open shape. When the first rod body is moved along the length direction of the fertilizing pipe, the blade group retracted in the fertilizing pipe can extend out from the first end.

[0009] And when the first rod body is rotated around the central axis direction of the fertilizing pipe, the blade group can be rotated around the central axis of the fertilizing pipe. The rotated blade group is used for stirring the biogas residue and / or the soil.

[0010] As a preferred technical solution of the present application, the blade group includes a bushing and a plurality of blades. The bushing is matched with the first rod body. The length direction of the bushing is the same as the length direction of the first rod body. The plurality of blades are distributed around the central axis of the bushing, and / or the plurality of blades are distributed along the length direction of the bushing.

[0011] As a preferred technical solution of the present application, the blade includes a first blade and a second blade. The second blade is sleeved outside the first blade. The second blade is connected to the bushing. A spring is connected between the first blade and the second blade. The spring has elasticity. The blade has an initial state. When the blade is in the initial state, the spring provides an elastic force to make the first blade extend out of the second blade.

[0012] As a preferred technical solution of the present application, the blade is arranged obliquely on the bushing, so that when the first rod body is rotated to drive the blade group to rotate, the obliquely arranged blade can turn the lower-layer biogas residue and / or soil to the upper layer.

[0013] As a preferred technical solution of the present application, a one-way locking structure is arranged between the bushing and the first rod body. The one-way locking structure is used to make the first rod body and the bushing rotate synchronously in one direction around the central axis of the fertilizing pipe.

[0014] The one-way locking structure includes a ratchet and a pawl. The ratchet is arranged on the first rod body, and the pawl is arranged on the bushing, or the ratchet is arranged on the bushing, and the pawl is arranged on the first rod body.

[0015] As the preferred technical solution of the present application, a groove is provided on the end of the first blade away from the second blade, and a ball is provided in the groove. The groove is used to limit the ball to prevent the ball from escaping from the groove. The ball can roll by itself, and when the blade is retracted in the fertilizer tube, the ball corresponding to the blade contacts the inner wall of the fertilizer tube.

[0016] As a preferred technical solution of the present application, the side of the first blade facing the piston is a first side portion, the first side portion is inclined or arc-shaped, and the first side portion is used to guide the retraction of the first blade relative to the second blade.

[0017] As a preferred technical solution of the present application, a plurality of liquid outlet holes are provided on the side wall of the first end portion, and the liquid outlet holes are used to allow the biogas slurry to flow from the inside of the fertilization pipe to the outside of the fertilization pipe.

[0018] As a preferred technical solution of the present application, the fertilization pipe is connected to a biogas fertilizer conveying device, and the biogas fertilizer conveying device is used to supply biogas fertilizer to the fertilization pipe.

[0019] As a preferred technical solution of the present application, the biogas fertilizer conveying device includes a conveying pipe, which is connected to the first rod body and is rotatably connected to the first rod body so that the conveying pipe can rotate relative to the first rod body around the central axis of the first rod body.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the solution of this application, by setting the first rod body, the piston and the blade group, during the process of fertilizing the roots of crops, the first rod body can first drive the piston to move along the length direction of the fertilizing pipe, so that the piston moves to a position close to the first end, thereby reducing the space of the fertilizing cavity. In this state, it is convenient to insert the fertilizing pipe into the soil so that the first end of the fertilizing pipe is in the soil at the root system of the crops. Then, pull the first rod body to make the piston move away from the first end, thereby increasing the space of the fertilizing cavity. Then, inject biogas fertilizer into the fertilizing channel on the first rod body, so that the biogas fertilizer flows along the fertilizing channel into the fertilizing cavity. After injecting the required amount of biogas fertilizer for fertilization, pull the first rod body again to make the piston move towards the first end. During the process of the piston moving towards the first end, the biogas fertilizer in the fertilizing cavity is squeezed, so that the liquid biogas slurry can seep into the soil from the open first end. In this way, the speed of the biogas slurry seeping into the soil at the roots of the crops can be accelerated, the application efficiency of the biogas slurry can be improved. At the same time, when the biogas slurry in the biogas fertilizer continuously seeps into the soil at the roots of the crops, the biogas residue in the biogas fertilizer still remains in the fertilizing cavity. After most of the biogas slurry in the fertilizing cavity is absorbed by the soil, by moving the first rod body relative to the fertilizing pipe, the blade group extends from the first end, and then rotate the first rod body around the central axis direction of the fertilizing pipe to make the blade group rotate around the central axis of the fertilizing pipe. Since the blade group is not blocked by the inner wall of the fertilizing pipe at this time, the rotating blade group stirs the biogas residue and the soil, so as to facilitate the mixing of the biogas residue and the soil at the root system of the crops, thereby avoiding the situation that most of the biogas residue accumulates in the soil at the outlet of the fertilizing pipe, and is more conducive to the biogas residue being dispersed into the soil at the root system, and avoiding the phenomenon of over-fertilization in the local soil at the root system of the crops;

[0022] At the same time, during the fertilization process, different application methods are adopted for the biogas slurry and the biogas residue, that is, the fertilizing channels for the biogas slurry and the biogas residue are different. Specifically, for the biogas slurry, the biogas slurry seeps into the soil from the fertilizing cavity. For the biogas residue, as the biogas slurry seeps in, the biogas residue continuously accumulating at the first end is stirred by the blade group, so that the biogas residue and the soil are mixed. At the same time, since the biogas slurry is applied to the soil before the biogas residue, the biogas slurry can first moisten the soil at the root system to reduce the probability of hardening of the soil at the root system, so that it is more conducive to driving the soil movement during the subsequent process of the blade group stirring the soil at the root system, and can reduce the pulling degree of the soil on the crop roots, so as to reduce the probability of the roots being broken when the soil is stirred by the blade, and thus is more conducive to the development of the crop roots;

[0023] 2. Further, by providing the first blade and the second blade, the second blade is sleeved outside the first blade, and a spring is connected between the first blade and the second blade. When the blade is in the initial state, the spring provides an elastic force to make the first blade protrude from the second blade. Thus, before the fertilizer application tube is inserted into the soil, in the fertilizer application tube where the blade group is located, at this time, the first blade retracts into the second blade, and the deformation of the spring increases. After driving the first rod to move, after the blade group in the fertilizer application tube protrudes from the first end, under the action of the elastic force of the spring, the first blade can gradually protrude from the second blade, thereby increasing the length of the blade. During the subsequent process of the blade group agitating the biogas residue and the soil at the root system, the range of the soil being agitated can be further increased, thereby further improving the dispersion degree of the applied biogas residue in the soil at the crop root system;

[0024] 3. Further, by providing a ratchet and a pawl, the first rod and the bushing can rotate synchronously in a single direction around the central axis of the fertilizer application tube. Specifically, when driving the first rod to rotate in the first direction, the bushing rotates synchronously with the first rod. At this time, the inclined blade can turn the lower biogas residue and soil to the upper layer; when driving the first rod to rotate in the second direction, where the second direction is the opposite direction of the first direction, at this time, under the action of the one-way locking structure, the first rod disconnects from the linkage with the bushing, so that the rotation of the first rod does not drive the bushing to rotate. Thus, it is convenient for the operator to make the blade group rotate in a specific direction when controlling the rotation of the first rod, so that when the first rod is rotated manually, the lower biogas residue and soil can be turned to the upper layer under the agitation of the blade;

[0025] At the same time, after the blade group protrudes from the first end and finishes agitating and mixing the biogas residue and the soil, while maintaining the state where the blade group protrudes from the first end, by pulling out the fertilizer application tube and the first rod from the soil, since the blade is inclined and the blade can freely rotate around the central axis of the first rod, thus, during the process of the blade being pulled out with the fertilizer application tube, the soil originally in contact with the outer wall of the fertilizer application tube can abut against the blade to provide a resistance effect for pulling out the blade from the soil. At this time, the resistance effect provided can drive the blade to rotate relative to the central axis of the first rod, thereby scraping the soil originally in contact with the outer wall of the fertilizer application tube, and during the scraping process, as the blade rotates, the soil originally in contact with the outer wall of the fertilizer application tube can be scraped in multiple directions, so as to further facilitate the loosening of the soil. At the same time, after the fertilizer application tube is pulled out from the soil, the soil loosened by the blade can fill the columnar channel formed by fertilization, thereby reducing the workload of filling the columnar channel formed by subsequent fertilization and further improving the fertilization efficiency;

[0026] 4. Further, by providing a card slot and a ball, the ball can roll by itself in the card slot. When the blade is retracted into the fertilizer pipe, the ball corresponding to the blade contacts the inner wall of the fertilizer pipe. Thus, after biogas fertilizer is injected into the fertilizer chamber and the piston moves toward the first end, the blade and the piston move together toward the first end. Since the blade is inclined and the ball can roll by itself, as the blade moves toward the first end, the biogas liquid can push the blade to rotate, so that the blade rotates around the central axis of the first rod body, thereby being able to stir the biogas fertilizer in the fertilizer chamber, facilitating further pulverization of the biogas residue under the stirring action of the blade, and being conducive to more dispersed distribution of the biogas residue in the soil during the subsequent mixing process of the biogas residue and the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG.

[0028] Figure 2 FIG.

[0029] Figure 3 FIG.

[0030] Figure 4 FIG.

[0031] Figure 5 FIG.

[0032] Figure 6 FIG.

[0033] Figure 7 FIG.

[0034] Figure 8 FIG.

[0035] Figure 9Schematic three-dimensional structure diagram of a shaft sleeve and a blade in one implementation manner of a dual-channel fertilizer applicator for biogas residue and biogas slurry in the present application;

[0036] Reference numerals in the figure: 1 - fertilizer application pipe, 2 - piston, 3 - first rod body, 4 - blade group, 5 - fertilizer application channel, 6 - fertilizer application chamber, 7 - first end, 8 - shaft sleeve, 9 - blade, 10 - first blade, 11 - second blade, 12 - spring, 13 - ratchet, 14 - pawl, 15 - card slot, 16 - ball, 17 - first side, 18 - liquid outlet hole, 19 - biogas fertilizer conveying device, 20 - conveying pipe, 21 - fertilizer storage chamber, 22 - suction pump. Specific implementation manner

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0038] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention claimed, but merely represents some embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0042] Embodiment 1: A dual-channel fertilizer applicator for biogas residue and biogas slurry provided in this embodiment is shown in Figures 1 - 4As shown in the figure, it includes a fertilizer application pipe 1, a piston 2, a first rod body 3 and a blade group 4. The piston 2 fits against the inner wall of the fertilizer application pipe 1. The first rod body 3 is connected to the piston 2. When a force is applied to the first rod body 3 along the length direction of the fertilizer application pipe 1, the piston 2 can move relative to the fertilizer application pipe 1 along the length direction of the fertilizer application pipe 1;

[0043] A fertilizer application channel 5 is provided in the first rod body 3. The piston 2 and the fertilizer application pipe 1 cooperate to form a fertilizer application cavity 6. The fertilizer application channel 5 is communicated with the fertilizer application cavity 6. The blade group 4 is arranged on the first rod body 3. The end of the fertilizer application pipe 1 corresponding to the fertilizer application cavity 6 is a first end 7. The first end 7 is in an open shape. When the first rod body 3 is moved along the length direction of the fertilizer application pipe 1, the blade group 4 retracted in the fertilizer application pipe 1 can extend out from the first end 7;

[0044] And when the first rod body 3 is rotated around the central axis direction of the fertilizer application pipe 1, the blade group 4 can be rotated around the central axis of the fertilizer application pipe 1. The rotated blade group 4 is used for stirring the biogas residue and / or the soil.

[0045] In this application, by providing the first rod body 3, the piston 2, and the blade group 4, during the process of fertilizing the roots of crops, the first rod body 3 can first drive the piston 2 to move along the length direction of the fertilizer application pipe 1, so that the piston 2 moves to a position close to the first end 7, thereby reducing the space of the fertilizer application cavity 6. In this state, it is convenient to insert the fertilizer application pipe 1 into the soil, so that the first end 7 of the fertilizer application pipe 1 is in the soil at the root system of the crops. Then, pull the first rod body 3 to make the piston 2 move away from the first end 7, thereby increasing the space of the fertilizer application cavity 6. Then, inject biogas fertilizer into the fertilizer application channel 5 on the first rod body 3, so that the biogas fertilizer flows along the fertilizer application channel 5 into the fertilizer application cavity 6. After injecting the required amount of biogas fertilizer for fertilization, pull the first rod body 3 again to make the piston 2 move towards the first end 7. During the process of the piston 2 moving towards the first end 7, the biogas fertilizer in the fertilizer application cavity 6 is squeezed, so that the liquid biogas slurry can seep into the soil from the open first end 7. In this way, the speed of the biogas slurry seeping into the soil at the roots of the crops can be accelerated, the application efficiency of the biogas slurry can be improved. At the same time, when the biogas slurry in the biogas fertilizer continuously seeps into the soil at the roots of the crops, the biogas residues in the biogas fertilizer still remain in the fertilizer application cavity 6. After most of the biogas slurry in the fertilizer application cavity 6 is absorbed by the soil, by moving the first rod body 3 relative to the fertilizer application pipe 1, the blade group 4 extends from the first end 7, and then rotate the first rod body 3 around the central axis direction of the fertilizer application pipe 1, so that the blade group 4 rotates around the central axis of the fertilizer application pipe 1. Since the blade group 4 is not blocked by the inner wall of the fertilizer application pipe 1 at this time, the rotating blade group 4 stirs the biogas residues and the soil, thereby facilitating the mixing of the biogas residues and the soil at the roots of the crops, and avoiding the situation that most of the biogas residues accumulate in the soil at the outlet of the fertilizer application pipe 1, which is more conducive to the biogas residues being dispersed into the soil at the root system, and avoiding the phenomenon of over-fertilization of the local soil at the roots of the crops;

[0046] At the same time, during the fertilization process, different application methods are adopted for the biogas slurry and the biogas residues, that is, the fertilizer application channels 5 for the biogas slurry and the biogas residues are different. Specifically, for the biogas slurry, the biogas slurry seeps into the soil from the fertilizer application cavity 6. For the biogas residues, as the biogas slurry seeps in, the biogas residues continuously accumulated at the first end 7 are stirred by the blade group 4, so that the biogas residues and the soil are mixed. At the same time, since the biogas slurry is applied to the soil before the biogas residues, the biogas slurry can first moisten the soil at the root system, so as to reduce the probability of the soil at the root system forming hard lumps, so that during the subsequent process of the blade group 4 stirring the soil at the root system, it is more conducive to driving the soil to move, and can reduce the pulling degree of the soil on the crop roots, so that the probability of the roots being broken can be reduced when the soil is stirred by the blades, thereby being more conducive to the development of the crop roots;

[0047] And in the present application, when the space of the fertilization cavity 6 changes, the side of the fertilization cavity 6 corresponding to the side far from the piston 2 is the soil, and there are voids in the soil, so that gas can be discharged from the fertilization cavity 6 through the voids in the soil or enter the fertilization cavity 6 from the voids in the soil.

[0048] As a preferred embodiment, on the basis of the above method, further, the blade group 4 includes a bushing 8 and a plurality of blades 9. The bushing 8 is matched with the first rod body 3. The length direction of the bushing 8 is the same as the length direction of the first rod body 3. The plurality of blades 9 are distributed around the central axis of the bushing 8, and / or the plurality of blades 9 are distributed along the length direction of the bushing 8.

[0049] Further, by arranging a plurality of blades 9, the plurality of blades 9 are distributed around the central axis of the bushing 8, and / or the plurality of blades 9 are distributed along the length direction of the bushing 8. In this way, the range and effect of stirring the biogas residue or soil by the blades 9 can be further improved.

[0050] As a preferred embodiment, on the basis of the above method, further, the blade 9 includes a first blade 10 and a second blade 11. The second blade 11 is sleeved outside the first blade 10. The second blade 11 is connected to the bushing 8. A spring 12 is connected between the first blade 10 and the second blade 11. The spring 12 has elasticity. The blade 9 has an initial state. When the blade 9 is in the initial state, the spring 12 provides an elastic force to make the first blade 10 extend out of the second blade 11.

[0051] Further, by arranging the first blade 10 and the second blade 11, the second blade 11 is sleeved outside the first blade 10, and a spring 12 is connected between the first blade 10 and the second blade 11, so that when the blade 9 is in the initial state, the spring 12 provides an elastic force to make the first blade 10 extend out of the second blade 11. In this way, before the fertilization pipe 1 is inserted into the soil, inside the fertilization pipe 1 where the blade group 4 is located, at this time, the first blade 10 is retracted into the second blade 11, and the deformation amount of the spring 12 increases. After driving the first rod body 3 to move, when the blade group 4 inside the fertilization pipe 1 extends out of the first end 7, under the action of the elastic force of the spring 12, the first blade 10 can gradually extend out of the second blade 11, thereby increasing the length of the blade 9. During the subsequent process of the blade group 4 stirring the biogas residue and the soil at the root system, the range of soil stirring can be further improved, so as to further improve the dispersion degree of the applied biogas residue in the soil at the root system of the crop.

[0052] Embodiment 2: On the basis of the technical solution of Embodiment 1, further, see Figures 1 - 5 and Figure 9As shown, the blade 9 is inclined and arranged on the bushing 8, so that when the first rod 3 is rotated to drive the blade group 4 to rotate, the inclined blade 9 can turn the lower-layer biogas residue and / or soil to the upper layer.

[0053] Furthermore, the blade 9 is inclined and arranged on the bushing 8. In this way, when the first rod 3 is rotated to drive the blade group 4 to rotate, with the rotation of the blade 9, the inclined blade 9 can turn the lower-layer biogas residue and soil to the upper layer, which can further improve the mixing effect of the biogas residue and soil.

[0054] As a preferred embodiment, on the basis of the above method, further, a one-way locking structure is arranged between the bushing 8 and the first rod 3, and the one-way locking structure is used to make the first rod 3 and the bushing 8 rotate synchronously in one direction around the central axis of the fertilizer application pipe 1;

[0055] The one-way locking structure includes a ratchet 13 and a pawl 14. The ratchet 13 is arranged on the first rod 3, and the pawl 14 is arranged on the bushing 8, or the ratchet 13 is arranged on the bushing 8, and the pawl 14 is arranged on the first rod 3.

[0056] Furthermore, by arranging the ratchet 13 and the pawl 14, the first rod 3 and the bushing 8 are made to rotate synchronously in one direction around the central axis of the fertilizer application pipe 1. Specifically, when the first rod 3 is driven to rotate in the first direction, the bushing 8 and the first rod 3 rotate synchronously. At this time, the inclined blade 9 can turn the lower-layer biogas residue and soil to the upper layer; when the first rod 3 is driven to rotate in the second direction, where the second direction is the opposite direction of the first direction, at this time, under the action of the one-way locking structure, the first rod 3 disconnects the linkage with the bushing 8, so that the rotation of the first rod 3 does not drive the bushing 8 to rotate. In this way, it is convenient for the operator to make the blade group 4 rotate in a specific direction when controlling the rotation of the first rod 3, so that when the first rod 3 is rotated manually, the lower-layer biogas residue and soil can be turned to the upper layer under the agitation of the blade 9;

[0057] At the same time, after the blade group 4 extends from the first end 7 and completes the stirring and mixing of the biogas residue and the soil, the blade group 4 is kept extending from the first end 7, and the fertilizer pipe 1 and the first rod body 3 are pulled out of the soil. Since the blade 9 is inclined and the blade 9 can rotate freely in one direction around the central axis of the first rod body 3, in the process of the blade 9 being pulled out with the fertilizer pipe 1, the soil that was originally in contact with the outer wall of the fertilizer pipe 1 can resist the blade 9 to provide resistance to the blade 9 being pulled out from the soil. At this time, the resistance provided by the blade 9 can drive The blade 9 rotates relative to the central axis of the first rod body 3, thereby scraping the soil that was originally in contact with the outer wall of the fertilizer pipe 1, and during the scraping process, the blade 9 rotates so as to scrape the soil that was originally in contact with the outer wall of the fertilizer pipe 1 in multiple directions, which can further facilitate the loosening of the soil. At the same time, after the fertilizer pipe 1 is pulled out of the soil, the soil loosened by the blade 9 can fill the columnar channel formed by fertilization, thereby reducing the workload of filling the columnar channel formed by fertilization in the future, and further improving the fertilization efficiency;

[0058] The specific structures of the ratchet wheel 13 and the pawl 14 are prior art and thus will not be described in detail here.

[0059] As a preferred embodiment, on the basis of the above method, further, a groove 15 is provided on the end of the first blade 10 away from the second blade 11, and a ball 16 is provided in the groove 15. The groove 15 is used to limit the ball 16 to prevent the ball 16 from escaping from the groove 15. The ball 16 can roll by itself. When the blade 9 is retracted in the fertilizer tube 1, the ball 16 corresponding to the blade 9 contacts the inner wall of the fertilizer tube 1.

[0060] Furthermore, by providing the slot 15 and the ball 16, the ball 16 can roll in the slot 15. When the blade 9 is retracted in the fertilization tube 1, the ball 16 corresponding to the blade 9 contacts the inner wall of the fertilization tube 1. In this way, after the biogas fertilizer is injected into the fertilization chamber 6 and the piston 2 is moved toward the first end 7, the blade 9 moves together with the piston 2 toward the first end 7. Since the blade 9 is inclined and the ball 16 can roll by itself, as the blade 9 moves toward the first end 7, the biogas liquid can push the blade 9 to rotate, thereby causing the blade 9 to rotate around the central axis of the first rod body 3, so that the biogas fertilizer in the fertilization chamber 6 can be stirred, so that the biogas residue can be further broken down under the stirring action of the blade 9, and the biogas residue can be more dispersed in the soil during the subsequent mixing of the biogas residue and soil.

[0061] As a preferred embodiment, on the basis of the above-described manner, further, one side of the first blade 10 facing the piston 2 is a first side portion 17, and the first side portion 17 is inclined or arc-shaped, and the first side portion 17 is configured to guide the retraction of the first blade 10 relative to the second blade 11.

[0062] Further, by setting the first side portion 17 to be inclined or arc-shaped so as to guide the retraction of the first blade 10 relative to the second blade 11. Specifically, after the fertilizer application tube 1 is pulled out of the soil, during the process of contracting the blade 9 extending outside the first end portion 7 into the fertilizer application tube 1, by moving the first rod body 3 relative to the fertilizer application tube 1 in a direction away from the first end portion 7, the first side portion 17 on the first blade 10 abuts against the first end portion 7. As the first rod body 3 continues to move, the force exerted by the first end portion 7 on the first side portion 17 of the first blade 10 continuously increases. Under the action of this force, the first blade 10 can be pushed to move relative to the second blade 11, so that the first blade 10 gradually retracts into the first blade 10 until the blade 9 abuts against the inner wall of the fertilizer application tube 1. In this way, the convenience of contracting the blade group 4 into the fertilizer application tube 1 is improved.

[0063] Embodiment Three: On the basis of the technical solution of Embodiment Two, further, as shown in Figures 6 - 8 a plurality of liquid outlet holes 18 are provided on the side wall of the first end portion 7, and the liquid outlet holes 18 are configured to allow the biogas slurry to flow from the inside of the fertilizer application tube 1 to the outside of the fertilizer application tube 1.

[0064] Further, by providing a plurality of liquid outlet holes 18, during the process of pushing the piston 2 to move to squeeze the fertilizer application cavity 6, part of the biogas slurry in the biogas fertilizer can flow from the liquid outlet holes 18 to the soil outside the fertilizer application tube 1, thereby increasing the channels for the biogas slurry in the fertilizer application cavity 6 to penetrate into the soil, and further improving the efficiency of applying the biogas slurry to the crop roots and the soil at the root portions.

[0065] As a preferred embodiment, on the basis of the above-described manner, further, the fertilizer application tube 1 is connected to a biogas fertilizer conveying device 19, and the biogas fertilizer conveying device 19 is configured to supply biogas fertilizer to the fertilizer application tube 1.

[0066] As a preferred embodiment, on the basis of the above-described manner, further, the biogas fertilizer conveying device 19 includes a conveying pipe 20, the conveying pipe 20 is communicated with the first rod body 3, and the conveying pipe 20 is rotatably connected to the first rod body 3 such that the conveying pipe 20 can rotate relative to the first rod body 3 around the central axis of the first rod body 3.

[0067] Furthermore, by providing a biogas fertilizer conveying device 19 for supplying biogas fertilizer to the fertilizer application pipe 1. Specifically, the biogas fertilizer conveying device 19 includes a fertilizer storage chamber 21 and a conveying pipe 20. The conveying pipe 20 is equipped with a suction pump 22. The suction pump 22 is used to provide power to convey the biogas fertilizer in the fertilizer storage chamber 21 through the conveying pipe 20 to the fertilizer application channel 5 of the first rod body 3. The specific structure of the suction pump 22 is prior art and will not be elaborated here. At the same time, the conveying pipe 20 is rotatably connected to the first rod body 3 so that when the first rod body 3 rotates relative to the fertilizer application pipe 1 around its own central axis, the conveying pipe 20 remains stationary relative to the fertilizer application pipe 1, thereby further improving the convenience and flexibility when rotating the first rod body 3.

[0068] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above respective embodiments, the present invention is not limited to the above specific implementation manners. Therefore, any modification or equivalent replacement to the present invention; and all technical solutions and their improvements that do not depart from the spirit and scope of the invention are covered by the scope of the claims of the present invention.

Claims

1. A dual-channel fertilization device for biogas residues and biogas slurry, characterized in that: It comprises a fertilizer pipe, a piston, a first rod body and a blade group, wherein the piston is fitted with the inner wall of the fertilizer pipe, the first rod body is connected to the piston, and when a force along the length direction of the fertilizer pipe is applied to the first rod body, the piston can be moved relative to the fertilizer pipe along the length direction of the fertilizer pipe; A fertilization channel is provided in the first rod body, the piston cooperates with the fertilization tube to form a fertilization chamber, the fertilization channel is connected to the fertilization chamber, the blade group is provided on the first rod body, the end of the fertilization tube corresponding to the fertilization chamber is the first end, the first end is open, and when the first rod body is moved along the length direction of the fertilization tube, the blade group retracted in the fertilization tube can be extended from the first end; When the first rod body is rotated around the central axis of the fertilizer pipe, the blade group can be rotated around the central axis of the fertilizer pipe, and the rotating blade group is used to stir the biogas residue and / or soil; The blade assembly includes a shaft sleeve and a plurality of blades, the shaft sleeve cooperates with the first rod body, the length direction of the shaft sleeve is in the same direction as the length direction of the first rod body, the plurality of blades are distributed around the central axis of the shaft sleeve, and / or the plurality of blades are distributed along the length direction of the shaft sleeve; the blades include a first blade and a second blade, the second blade is sleeved outside the first blade, the second blade is connected to the shaft sleeve, a spring is connected between the first blade and the second blade, the spring is elastic, the blade has an initial state, and when the blade is in the initial state, the spring provides elastic force to make the first blade extend from the second blade; A one-way locking structure is provided between the shaft sleeve and the first rod body, and the one-way locking structure is used to make the first rod body and the shaft sleeve rotate synchronously in one direction around the central axis of the fertilizer pipe; The one-way locking structure comprises a ratchet and a pawl, wherein the ratchet is arranged on the first rod body and the pawl is arranged on the shaft sleeve, or the ratchet is arranged on the shaft sleeve and the pawl is arranged on the first rod body; A slot is provided on the end of the first blade away from the second blade, and a ball is provided in the slot. The slot is used to limit the ball to prevent the ball from escaping from the slot. The ball can roll by itself. When the blade is retracted in the fertilizer tube, the ball corresponding to the blade contacts the inner wall of the fertilizer tube.

2. The dual-channel fertilizer application device for biogas residue and biogas slurry according to claim 1, wherein: The blades are arranged on the shaft sleeve in an inclined shape, so that when the first rod body is rotated to drive the blade assembly to rotate, the inclined blades can turn the biogas residue and / or soil in the lower layer to the upper layer.

3. The dual-channel fertilization device for biogas residues and biogas slurry according to claim 2, wherein: The side of the first blade facing the piston is a first side portion, the first side portion is inclined or arc-shaped, and the first side portion is used to guide the retraction of the first blade relative to the second blade.

4. The dual-channel fertilizer application device for biogas residue and biogas slurry according to claim 3, characterized in that: A plurality of liquid outlet holes are arranged on the side wall of the first end portion, and the liquid outlet holes are used to allow the biogas slurry to flow from the inner side of the fertilization pipe to the outer side of the fertilization pipe.

5. The dual-channel fertilizer application device for biogas residues and biogas slurry according to claim 4, characterized in that: The fertilization pipe is connected with a biogas fertilizer conveying device, and the biogas fertilizer conveying device is used for supplying biogas fertilizer to the fertilization pipe.

6. The dual-channel fertilizing device for biogas residues and biogas slurry according to claim 5, wherein: The biogas manure conveying device comprises a conveying pipe, which is communicated with the first rod body and is rotatably connected to the first rod body, so that the conveying pipe can rotate relative to the first rod body around the central axis of the first rod body.

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