A liquid fertilizer metering spraying device

Abstract

This utility model discloses a liquid fertilizer quantitative spraying device, including a connecting pipe connected to a backpack spraying box, one end of which is connected to a watering cylinder, and a quantitative box connected to the connecting pipe between the watering cylinder and the backpack spraying box; the quantitative box has through holes at both ends, and a first block and a second block are provided at the two through holes; a concave hydraulic regulating pipe is connected to the outside of the quantitative box, and two protruding parts of the hydraulic regulating pipe extend into the quantitative box, and the protruding parts of the hydraulic regulating pipe extend outward to form a transition section, and a first piston and a second piston are respectively provided in the transition section of the two hydraulic regulating pipes, the first piston is connected to the first block, the second piston is connected to the second block, a driving piston is provided in the hydraulic regulating pipe, a driving rod is connected to the driving piston, and an operating rod is connected to the driving rod.

Description

Technical Field

[0001] This utility model belongs to the field of sugarcane planting technology, and specifically relates to a liquid fertilizer quantitative spraying device. Background Technology

[0002] Sugarcane requires multiple top-dressings during its field growth to meet its high nutrient demands. There are two main methods of fertilizer application: First, solid fertilizer is applied in a ring around the sugarcane stalks. This method is convenient but lacks precise quantification, relying heavily on the experience of the applicator to control the amount, which can easily lead to problems like burning seedlings and damaging roots. Second, solid fertilizer is dissolved in a specific ratio to create liquid fertilizer for irrigation. This method allows for more even nutrient absorption by the sugarcane roots and a more stable release of nutrients. While mechanized quantitative fertilization equipment can solve the accuracy problem, its purchase and maintenance costs are high, and it is difficult for machinery to operate in complex terrains such as mountains and hills. Therefore, in some complex terrains, traditional backpack sprayers are still necessary for fertilization. Utility Model Content

[0003] The purpose of this invention is to provide a liquid fertilizer metering spraying device, thereby solving the problem of how to meter the liquid fertilizer when applying it to sugarcane seedlings. The specific technical solution is as follows:

[0004] A liquid fertilizer metering spraying device includes a connecting pipe connected to a backpack spraying box, one end of the connecting pipe being connected to a watering cylinder, and a metering box being connected to the connecting pipe between the watering cylinder and the backpack spraying box.

[0005] The metering box has through holes at both ends, and a first block and a second block are provided at the two through hole positions;

[0006] The metering box is externally connected to a concave hydraulic regulating tube. Two protruding parts of the hydraulic regulating tube extend into the metering box, and the protruding parts of the hydraulic regulating tube extend outward to form a transition section. A first piston and a second piston are respectively arranged in the transition section of the two hydraulic regulating tubes. The first piston is connected to the first block and the second piston is connected to the second block. A drive piston is arranged in the hydraulic regulating tube, and a drive rod is connected to the drive piston. An operating rod is connected to the drive rod.

[0007] Preferably, both the first piston and the second piston include a piston body, a groove is provided on the side of the piston body, a through hole is provided at the end of the piston body, the through hole communicates with the groove, a sealing ring is embedded in the groove, the sealing ring is pressed between the piston body and the hydraulic regulating pipe, and a second sealing ring is also embedded on the surface of the piston body.

[0008] Preferably, the piston body includes a first piston portion and a second piston portion, the radial length of the first piston portion is greater than the radial length of the second piston portion, and the sealing ring is disposed on the second piston portion.

[0009] Preferably, the piston body is provided with a plurality of sealing rings, each sealing ring is configured with a groove, and a connecting hole is provided between the grooves.

[0010] Preferably, the drive piston includes an intermediate piston and end pistons at both ends of the intermediate piston. The radial length of the intermediate piston is less than the radial length of the end pistons. Two sealing grooves are provided on the side of the intermediate piston. Through holes are provided on the end pistons at both ends and the intermediate piston, respectively. The two through holes communicate with the sealing grooves on the corresponding sides. A sealing ring is embedded in the sealing groove and is pressed between the intermediate piston and the hydraulic regulating pipe.

[0011] Preferably, a positioning block is connected to the end of the metering box, a positioning protrusion is formed on the positioning block, the positioning protrusion is connected to the hydraulic regulating pipe, and the drive rod passes through the positioning protrusion and the positioning block.

[0012] Preferably, a protrusion is formed on the metering box, a connecting block is connected to the protrusion, an installation groove is provided on the connecting block, and the hydraulic regulating pipe is disposed in the installation groove.

[0013] This invention provides a liquid fertilizer metering spraying device. When fertilizing sugarcane seedlings, solid fertilizer is placed in a backpack spray box and dissolved in proportion to prepare liquid fertilizer. During fertilization, the liquid fertilizer in the backpack spray box enters the metering box through a connecting pipe. After the metering box is full, the liquid fertilizer in the metering box then reaches the irrigation cylinder, which directly irrigates the sugarcane seedlings. Because the liquid fertilizer is metered in the metering box, the fertilizer applicator can accurately control the amount of liquid fertilizer for each sugarcane seedling. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the structure of the backpack spray box provided by this utility model;

[0016] Figure 2 This is a schematic diagram of the metering box and metering cylinder provided by this utility model;

[0017] Figure 3 This is a side view of the metering box provided by this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the metering box provided by this utility model when discharging liquid fertilizer;

[0019] Figure 5 This is a schematic diagram of the structure of the metering box provided by this utility model when liquid fertilizer is discharged;

[0020] Figure 6 This is a schematic diagram of the structure of the first piston provided by this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the second piston provided by this utility model;

[0022] Figure 8 This is a schematic diagram of the structure of the drive piston provided by this utility model;

[0023] Explanation of key figure labels:

[0024] 1-Backpack-type spray box, 2-Connecting pipe, 21-Connecting hose, 22-Connecting rigid pipe, 3-Spraying cylinder, 4-Quantitative box, 40-Through hole, 41-Protrusion, 51-First block, 52-Second block, 6-Hydraulic regulating pipe, 71-First piston, 72-Second piston, 73-Piston body, 731-Groove, 732-Straight through hole, 11-First sealing ring, 16-Second sealing ring, 734-First piston part, 735-Second piston part, 736-Connecting hole, 8-Drive piston, 81-Intermediate piston, 82-End piston, 83-Sealing groove, 84-Piston through hole, 9-Drive rod, 10-Operating rod, 12-Positioning block, 13-Positioning protrusion, 14-Connecting block, 140-Mounting groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0029] See Figure 1 A liquid fertilizer metering spraying device includes a connecting pipe 2 connected to a backpack spraying box 1. The backpack spraying box 1 and the connecting pipe 2 are existing technologies. In the prior art, the connecting pipe 2 on the backpack spraying box 1 includes a connecting hose 21 and a connecting rigid pipe 22. The connecting hose 21 is directly connected to the backpack spraying box 1, while the connecting rigid pipe 22 can be held by the fertilizer applicator during fertilization.

[0030] See Figure 1 and Figure 2 In this invention, the connecting tube 2 is connected to the irrigation cylinder 3 via the connecting rigid tube 22, and the metering box 4 is connected to the connecting rigid tube 22. During fertilization, liquid fertilizer is metered into the metering box 4 and then enters the irrigation cylinder 3. The fertilizer applicator directly pours the liquid fertilizer from the irrigation cylinder 3 onto the root system of the sugarcane seedlings.

[0031] See Figure 1 and Figure 2 The metering box 4 has through holes 40 at both ends, and a first block 51 and a second block 52 are provided at the positions of the two through holes 40. A concave hydraulic regulating pipe 6 is connected to the outside of the metering box 4. Hydraulic oil is provided in the hydraulic regulating pipe 6. Two protruding parts of the hydraulic regulating pipe 6 extend into the metering box 4. The protruding parts of the hydraulic regulating pipe 6 extend outward to form transition parts. A first piston 71 and a second piston 72 are respectively provided in the transition parts of the two hydraulic regulating pipes 6. The first piston 71 is connected to the first block 51, and the second piston 72 is connected to the second block 52. A drive piston 8 is provided in the hydraulic regulating pipe 6. A drive rod 9 is connected to the drive piston 8, and an operating rod 10 is connected to the drive rod 9.

[0032] See Figure 2 and Figure 3 The metering box 4 has a protrusion 41, and a connecting block 14 is connected to the protrusion 41. The connecting block 14 is provided with an installation groove 140, and the hydraulic regulating pipe 6 is disposed in the installation groove 140.

[0033] The plugs corresponding to the two through holes 40 on the metering box 4, namely the first plug 51 and the second plug 52, have opposite states when the metering box 4 is used for metering, as detailed below:

[0034] See Figure 5 The fertilizer operator pushes the operating lever 10, causing the drive piston 8 to move towards the end where the first piston 71 is located within the hydraulic regulating pipe 6. The drive piston 8 pushes the hydraulic oil between the first piston 71 and the drive piston 8, which in turn pushes the first piston 71. The first block 51 connected to the first piston 71 is pushed and blocks the through hole 40 at one end. Due to the pressure caused by pushing the drive piston 8 towards the end where the first piston 71 is located, the hydraulic oil between the drive piston 8 and the second piston 72 moves towards the drive piston 8, thereby causing the second piston 72 to move towards the end where the drive piston 8 is located. This causes the second block 52 on the second piston 72 to move away from the through hole 40 at the other end. At this time, the first block 51 blocks the through hole 40 at one end of the metering box 4, and the second block 52 moves away from the through hole 40 at the other end of the metering box 4. Liquid fertilizer enters the metering box 4 through the through hole 40 on the side where the second block 52 is located.

[0035] See Figure 4The fertilizer operator pulls the operating lever 10, causing the drive piston 8 to move towards the end where the second piston 72 is located within the hydraulic regulating pipe 6. The drive piston 8 pushes the hydraulic oil between the second piston 72 and the drive piston 8, which in turn pushes the second piston 72. The second block 52 connected to the second piston 72 is pushed and blocks the through hole 40 at one end. Due to the pressure caused by pulling the drive piston 8 towards the end where the second piston 72 is located, the hydraulic oil between the drive piston 8 and the first piston 71 moves towards the drive piston 8, thereby causing the first piston 71 to move towards the end where the drive piston 8 is located. This causes the first block 51 on the first piston 71 to move away from the through hole 40 at the other end, and the liquid fertilizer in the metering box flows out from the through hole 40 on the side where the first block 51 is located.

[0036] When fertilizing, the operator fills the metering box 4 with liquid fertilizer by operating lever 10, and then pours the liquid fertilizer from the metering box 4 into the irrigation cylinder 3. The irrigation cylinder 3 has multiple small holes, allowing the liquid fertilizer to be poured onto the sugarcane seedlings through these holes. After the liquid fertilizer in the metering box 4 has completely entered the irrigation cylinder 3, the operator operates lever 10 again to refill the metering box 4. At this time, the liquid fertilizer in the irrigation cylinder 3 is being poured onto the sugarcane seedlings through the small holes. After the liquid fertilizer in the irrigation cylinder 3 has been poured out, the metering box 4 is refilled with liquid fertilizer. Then, the operator operates lever 10 again to allow the liquid fertilizer in the refilled metering box 4 to continue flowing into the irrigation cylinder 3, continuing to fertilize the next sugarcane seedling. In this way, the liquid fertilizer is gradually absorbed into the roots of the sugarcane seedlings through the small holes on the irrigation cylinder 3. Direct watering, on the other hand, would result in fertilizer loss due to the limited soil permeability, either through surface runoff or deep seepage.

[0037] See Figure 6 In a preferred embodiment, the first piston 71 includes a piston body 73, a groove 731 is provided on the side of the piston body 73, a through hole 732 is provided at the end of the piston body 73, the through hole 732 communicates with the groove 731, a first sealing ring 11 is embedded in the groove 731, and the first sealing ring 11 is pressed between the piston body 73 and the hydraulic regulating pipe 6.

[0038] The piston body 73 is also embedded with a second sealing ring 16, which can provide a basic seal between the piston body 73 and the inner wall of the hydraulic regulating pipe 6.

[0039] When the drive piston 8 is pushed, the hydraulic oil pushes the first piston 71 under pressure, causing the first block 51 on it to block the through hole 40. Under pressure, the hydraulic oil squeezes the inner wall of the groove 731, thereby squeezing the first sealing ring 11 so that the first sealing ring 11 can better seal the hydraulic oil.

[0040] The piston body 73 includes a first piston portion 734 and a second piston portion 735. The radial length of the first piston portion 734 is greater than the radial length of the second piston portion 735. The first sealing ring 11 and the second sealing ring 16 are disposed on the second piston portion 735.

[0041] In a more preferred embodiment, the piston body 73 is provided with a plurality of first sealing rings 11, each of the first sealing rings 11 being configured with a groove 731, and a connecting hole 736 being provided between the grooves 731.

[0042] See Figure 7 In a preferred embodiment, the structure of the second piston 72 is the same as that of the first piston 71, and its sealing method is also the same as that of the first piston 71.

[0043] See Figure 8 In a preferred embodiment, the driving piston 8 includes an intermediate piston 81 and end pistons 82 disposed at both ends of the intermediate piston 81. The radial length of the intermediate piston 81 is less than the radial length of the end pistons 82. Two sealing grooves 83 are provided on the side of the intermediate piston 81. Piston through holes 84 are respectively provided on the end pistons 82 and the intermediate piston 81. The two piston through holes 84 are respectively connected to the sealing grooves 83 on the corresponding sides. A first sealing ring 11 is embedded in the sealing groove 83. The first sealing ring 11 is pressed between the intermediate piston 81 and the hydraulic regulating pipe 6.

[0044] When the drive piston 8 is pushed toward the first piston 71, the hydraulic oil on both sides of the drive piston 8 is under pressure. The hydraulic oil between the drive piston 8 and the second piston 72 enters the sealing groove 83 on that side through the piston through-hole 84, thus compressing the first sealing ring 11. Similarly, when the drive piston 8 is pushed toward the second piston 72, the hydraulic oil on both sides of the drive piston 8 is under pressure and flows into the two sealing grooves 83. The first sealing ring 11 on the drive piston 8 seals the hydraulic oil on both sides of the drive piston 8, stabilizing the pressure on both sides of the drive piston 8 during operation, thereby stabilizing the movement of the first piston 71 and the second piston 72.

[0045] See Figure 2 and Figure 3In a preferred embodiment, a positioning block 12 is connected to the end of the metering box 4, and a positioning protrusion 13 is formed on the positioning block 12. The positioning protrusion 13 is connected to the hydraulic regulating pipe 4, and the drive rod 9 passes through the positioning protrusion 13 and the positioning block 12. A sealing ring is embedded in the inner wall of the positioning protrusion 13 to provide a basic seal between the piston and the positioning protrusion 13.

[0046] In summary, the liquid fertilizer quantitative spraying device provided by this utility model enables quantitative fertilization of sugarcane seedlings when using a backpack spraying box to fertilize sugarcane seedlings in complex terrain.

[0047] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A liquid fertilizer quantitative spraying device, comprising a connecting pipe (2) connecting to a backpack spraying box (1), characterized in that, One end of the connecting pipe (2) is connected to the watering cylinder (3), and a metering box (4) is connected on the connecting pipe (2) between the watering cylinder (3) and the backpack spray box (1). The metering box (4) has through holes (40) at both ends, and a first block (51) and a second block (52) are provided at the two through holes (40). The metering box (4) is externally connected to a concave hydraulic regulating tube (6). Two protruding parts of the hydraulic regulating tube (6) extend into the metering box (4). The protruding parts of the hydraulic regulating tube (6) extend outward to form a transition section. A first piston (71) and a second piston (72) are respectively provided in the transition section of the two hydraulic regulating tubes (6). The first piston (71) is connected to the first block (51), and the second piston (72) is connected to the second block (52). A driving piston (8) is provided in the hydraulic regulating tube (6). A driving rod (9) is connected to the driving piston (8), and an operating rod (10) is connected to the driving rod (9).

2. The liquid fertilizer metering spraying device according to claim 1, characterized in that, Both the first piston (71) and the second piston (72) include a piston body (73). A groove (731) is provided on the side of the piston body (73). A through hole (732) is provided at the end of the piston body (73). The through hole (732) communicates with the groove (731). A first sealing ring (11) is embedded in the groove (731). The first sealing ring (11) is squeezed between the piston body (73) and the hydraulic regulating pipe (6). A second sealing ring (16) is also embedded on the surface of the piston body (73).

3. The liquid fertilizer metering spraying device according to claim 2, characterized in that, The piston body (73) includes a first piston portion (734) and a second piston portion (735), the radial length of the first piston portion (734) is greater than the radial length of the second piston portion (735), and the first sealing ring (11) is disposed on the second piston portion (735).

4. The liquid fertilizer metering spraying device according to claim 2, characterized in that, The piston body (73) is provided with a plurality of first sealing rings (11), each of the first sealing rings (11) is provided with a groove (731), and a connecting hole (736) is provided between the grooves (731).

5. The liquid fertilizer metering spraying device according to claim 1, characterized in that, The drive piston (8) includes an intermediate piston (81) and end pistons (82) at both ends of the intermediate piston (81). The radial length of the intermediate piston (81) is less than the radial length of the end pistons (82). Two sealing grooves (83) are provided on the side of the intermediate piston (81). Piston through holes (84) are provided on the end pistons (82) and the intermediate piston (81) at both ends. The two piston through holes (84) are respectively connected to the sealing grooves (83) on the corresponding sides. A sealing ring (11) is embedded in the sealing groove (83). The sealing ring (11) is squeezed between the intermediate piston (81) and the hydraulic regulating pipe (6).

6. The liquid fertilizer metering spraying device according to claim 1, characterized in that, A positioning block (12) is connected to the end of the metering box (4). A positioning protrusion (13) is formed on the positioning block (12). The positioning protrusion (13) is connected to the hydraulic regulating pipe (6). The drive rod (9) passes through the positioning protrusion (13) and the positioning block (12).

7. The liquid fertilizer metering spraying device according to claim 1, characterized in that, The metering box (4) has a protrusion (41) formed on it, and a connecting block (14) is connected to the protrusion (41). The connecting block (14) is provided with an installation groove (140), and the hydraulic regulating pipe (6) is disposed in the installation groove (140).

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