Portable fruit tree nutrient solution negative pressure injection device

Abstract

The invention discloses a portable fruit tree nutrient solution negative pressure injection device, and relates to the technical field of fruit tree planting, the portable fruit tree nutrient solution negative pressure injection device comprises two fixing assemblies, an assembling assembly and an injection assembly, the two fixing assemblies are correspondingly arranged up and down and are used for fixing the injection assembly on a trunk of a fruit tree, and connecting pieces are arranged on the outer sides of the upper and lower fixing assemblies; the assembling assembly is matched with the connecting piece and arranged beside the fixing assembly, the side face of the assembling assembly is connected with a bearing plate, and the injection assembly is adjustably arranged on the bearing plate; through cooperative work of a driving module and an injection module in the injection assembly, a driving box drives a driving gear, a driven gear, a second lead screw and other components, so that a push rod and a piston accurately move in a needle cylinder, and stable injection of a nutrient solution is achieved. Meanwhile, the injection assembly can horizontally slide on the bearing plate through the first lead screw, the injection position is flexibly adjusted, and continuous and stable supply of the nutrient solution is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of fruit tree planting, in particular to a portable negative pressure injection device for nutrient solution for fruit trees. Background Art

[0002] In the field of fruit tree cultivation, with the continuous innovation of planting technology and the in-depth promotion of refined management, how to accurately and efficiently meet the nutritional needs of fruit trees at different growth stages has become a core issue for improving fruit tree yield and fruit quality. At different stages of their life cycle, especially during the rapid growth stage, fruit trees have extremely strict and specific requirements for the type, quantity, and timing of nutrient supply. During this period, the metabolism of fruit trees is vigorous, and cell division and expansion are rapid, which significantly increases the demand for macronutrients such as nitrogen, phosphorus, and potassium, as well as trace elements such as calcium, magnesium, iron, and zinc. If the nutrient supply cannot match the growth rhythm of the fruit trees in a timely and accurate manner, it will directly lead to weakened growth potential, decreased stress resistance, and even cause physiological disorders such as flower and fruit drop and fruit deformity, seriously affecting the commercial value and economic benefits of the fruit.

[0003] Most existing fruit tree nutrient solution injection devices rely on the gravity of the nutrient solution itself to slowly flow into the trunk of the fruit tree. Due to the lack of sufficient pressure drive, on the one hand, the xylem duct structure inside the fruit tree trunk is complex and there is a certain amount of resistance. It is difficult for the nutrient solution to break through these obstacles and penetrate into the key parts of the fruit tree that need nutrition by relying solely on gravity; on the other hand, during the vigorous growth period of the fruit tree or when the bark is thick and the xylem is dense, the nutrient solution under the action of gravity is more difficult to flow. It can often only stay in the epidermis or shallow tissue of the fruit tree and cannot be truly absorbed and utilized by the fruit tree. The resulting problem of insufficient nutrient solution injection seriously affects the use effect of the nutrient solution, and the fruit tree cannot obtain sufficient and accurate nutrient supply, which may lead to a series of problems such as slow growth, yellowing leaves, and poor fruit development, thereby reducing the yield and quality of the fruit. Therefore, the present invention proposes a portable fruit tree nutrient solution negative pressure injection device. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable negative pressure injection device for nutrient solution for fruit trees, so as to solve the problem that the existing nutrient solution injection devices for fruit trees proposed in the above background technology mostly rely on the gravity of the nutrient solution itself to make it flow slowly into the trunk of the fruit tree. Due to the lack of sufficient pressure drive, on the one hand, the xylem duct structure inside the trunk of the fruit tree is complex and there is a certain resistance. It is difficult for the nutrient solution to break through these obstacles and penetrate into the key parts of the fruit tree that need nutrition by relying solely on gravity; on the other hand, when the fruit tree is in the vigorous growth period or the bark is thick and the xylem is dense, the nutrient solution under the action of gravity is more difficult to flow. It can often only stay in the epidermis or shallow tissue of the fruit tree and cannot be truly absorbed and utilized by the fruit tree, resulting in insufficient nutrient solution injection, which seriously affects the use effect of the nutrient solution. The fruit tree cannot obtain sufficient and accurate nutrient supply, which may lead to a series of problems such as slow growth, yellowing of leaves, and poor fruit development, thereby reducing the yield and quality of the fruit.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A portable negative pressure nutrient solution injection device for fruit trees, comprising a fixing assembly, an assembly assembly, and an injection assembly. The fixing assembly is provided with two groups corresponding to the upper and lower parts, and is used to fix the injection assembly to the trunk of the fruit tree. Connectors are provided on the outer sides of the upper and lower fixing assemblies. The assembly assembly cooperates with the connectors and is provided beside the fixing assembly. A supporting plate is connected to the side of the assembly assembly, and the injection assembly is adjustably provided on the supporting plate.

[0007] The assembly assembly includes an assembly plate, a connecting rod, a fixing block and a connecting hole. The upper and lower ends of the assembly plate are provided with connecting rods respectively. The fixing block is provided with connecting holes respectively. The other end of the connecting rod is fixedly connected to the end surface of the fixing block by fitting with the connecting hole.

[0008] The injection assembly includes a driving module and an injection module, and the driving module is used to drive the injection module to inject nutrient solution into the fruit tree.

[0009] Optionally, the fixing assembly includes a first arc plate, a second arc plate, a fastening bolt, a mounting hole, a fastening rod, a spring and an arc-shaped pressure plate. The first arc plate and the second arc plate are fixed to the tree trunk by fastening bolts provided at the front and rear ends. The first arc plate and the second arc plate are provided with a plurality of mounting holes equidistantly arranged around the circumference of the plate body. A fastening rod is provided on each of the mounting holes. The spring is provided at one end of the fastening rod facing the tree trunk, and the other end of the spring is provided with an arc-shaped pressure plate in contact with the tree trunk.

[0010] Optionally, the connecting member includes a connecting plate, connecting grooves are provided on both sides of the connecting plate, and limiting holes are provided on the connecting grooves on both sides.

[0011] Optionally, the assembly component also includes a limit screw, a cross bar, a hanging rod and a through hole. The limit screw is passed through the fixed block, and the limit screw cooperates with the limit hole. The cross bar is arranged on the upper part of the assembly plate, and a hanging rod is provided on one side of the cross bar. The middle part of the assembly plate is also provided with a through hole that cooperates with the injection module.

[0012] Optionally, the driving module includes a driving box, a driving gear, a fixed seat, a second screw rod, a guide rod, a driven gear and a first movable member, the driving box is arranged on a carrying plate, one output end of the driving box is connected to the driving gear, fixed seats are provided on both sides of the top of the driving box, a second screw rod is installed between the fixed seats on both sides, and a guide rod is also provided on the front and rear sides of the second screw rod, the second screw rod and the guide rod are jointly connected to the first movable member, and the end of the second screw rod passes through the fixed seat and is connected to the driven gear meshing with the driving gear.

[0013] Optionally, the injection module includes a mounting plate, a syringe, a push rod, a piston, a connecting tube, an injection needle, a hose, a liquid storage box and a one-way valve arranged on the top of the drive box. The syringe is fixedly mounted on the mounting plate, and a push rod is slidably connected to the syringe. One end of the push rod is fixedly connected to the first movable member, and a piston is provided at the end of the push rod close to the syringe. The other end of the syringe is connected to a connecting tube, and the other end of the connecting tube is connected to the injection needle. The body of the syringe is connected to a hose, and the other end of the hose is connected to a liquid storage box. The liquid storage box is mounted on the end of the hanging rod, and the connecting tube and the body of the hose are both provided with a one-way valve.

[0014] Optionally, a mounting groove is provided in the middle of the supporting plate along the direction of the plate body, and limiting sliding grooves are provided on both sides of the mounting groove. A first screw rod is installed in the mounting groove, and a knob for rotating the first screw rod is provided on the side of the supporting plate.

[0015] Optionally, the injection assembly also includes a second movable part, a slider and a heat dissipation port, the second movable part is arranged at the bottom of the drive box, and the second movable part is threadedly connected to the outside of the first screw rod, the bottom of the drive box is evenly distributed with sliders that cooperate with the limiting slide grooves, and the heat dissipation port is arranged on the side of the drive box away from the output end.

[0016] The beneficial effects of the present invention are:

[0017] 1. In this invention, the drive module and injection module in the injection assembly work together, with the drive box driving the driving gear, driven gear, second screw, and other components, enabling precise movement of the push rod and piston within the syringe, achieving stable injection of nutrient solution. Furthermore, the injection assembly can slide horizontally on the carrier plate via the first screw, allowing flexible adjustment of the injection position. This significantly reduces the burden of manual operation, improves the efficiency of nutrient solution injection operations for fruit trees, and ensures a continuous and stable supply of nutrient solution.

[0018] 2. In the present invention, the first and second curved plates are fixed to the tree trunk using fastening bolts, forming a ring-shaped structure surrounding the trunk. During the tightening process, the curved pressure plate, cushioned by the spring, closely adheres to the trunk surface, ensuring a secure fixation without damaging the trunk due to overtightening. Furthermore, the assembly assembly and the connector are securely connected through the stop screws and stop holes. The simple connection and easy disassembly make the device easy to carry to different orchards or fruit tree locations, enhancing its practicality and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a portable negative pressure injection device for fruit tree nutrient solution according to the present invention;

[0020] Figure 2 This is a structural schematic diagram of a portable negative pressure injection device for fruit tree nutrient solution according to the present invention from another perspective;

[0021] Figure 3 It is a structural schematic diagram of the fixing component in the present invention;

[0022] Figure 4 A top view of the fixing assembly of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the present invention without the fixing components;

[0024] Figure 6 It is a structural schematic diagram of the assembly components of the present invention;

[0025] Figure 7 A partial exploded view of the assembly components and connectors of the present invention;

[0026] Figure 8 Schematic diagram of the structure of the load-bearing plate in the present invention;

[0027] Figure 9 It is a structural schematic diagram of the injection assembly of the present invention;

[0028] Figure 10 This is a structural schematic diagram of the injection assembly of the present invention from another perspective;

[0029] Figure 11 It is a cross-sectional view of the injection assembly of the present invention.

[0030] The numbers in the figure are:

[0031] 1. Fixing assembly; 101. First arc plate; 102. Second arc plate; 103. Fastening bolt; 104. Mounting hole; 105. Fastening rod; 106. Spring; 107. Arc pressure plate;

[0032] 2. Connecting piece; 201. Connecting plate; 202. Connecting groove; 203. Limiting hole;

[0033] 3. Assembly components; 301. Assembly plate; 302. Connecting rod; 303. Fixing block; 304. Connecting hole; 305. Limiting screw; 306. Crossbar; 307. Hanging rod; 308. Through hole;

[0034] 4. Loading plate; 401. Mounting slot; 402. Limiting slide; 403. First screw rod; 404. Knob;

[0035] 5. Injection assembly; 501. Drive box; 502. Driving gear; 503. Fixed seat; 504. Second screw; 505. Guide rod; 506. Driven gear; 507. First moving part; 508. Mounting plate; 509. Syringe; 510. Push rod; 511. Piston; 512. Connecting tube; 513. Injection needle; 514. Hose; 515. Liquid storage box; 516. One-way valve; 517. Second moving part; 518. Slider; 519. Heat dissipation vent. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] The device of the present invention will be described below in conjunction with preferred embodiments thereof.

[0038] Example 1:

[0039] As attached Figure 1 To the attached Figure 11 As shown, the present invention provides a portable negative pressure injection device for nutrient solution for fruit trees, comprising a fixing component 1, an assembly component 3 and an injection component 5. The fixing component 1 is provided with two groups corresponding to the upper and lower parts, and is used to fix the injection component 5 on the trunk of the fruit tree. The outer sides of the upper and lower fixing components 1 are both provided with connecting members 2. The assembly component 3 cooperates with the connecting members 2 and is arranged beside the fixing component 1. The side of the assembly component 3 is connected to a carrying plate 4, and the injection component 5 is adjustably arranged on the carrying plate 4;

[0040] Example 2:

[0041] As attached Figure 3 To the attached Figure 4As shown, this embodiment is basically the same as the previous embodiment, except that the fixing assembly 1 includes a first arc plate 101, a second arc plate 102, a fastening bolt 103, a mounting hole 104, a fastening rod 105, a spring 106 and an arc pressure plate 107. The first arc plate 101 and the second arc plate 102 are fixed to the trunk by the fastening bolts 103 provided at the front and rear ends. The first arc plate 101 and the second arc plate 102 are provided with a plurality of mounting holes 104 equidistantly arranged around the circumference of the plate body, and a fastening rod 105 is provided on each of the plurality of mounting holes 104. The spring 106 is provided at one end of the fastening rod 105 facing the trunk, and the other end of the spring 106 is provided with an arc pressure plate 107 in contact with the trunk.

[0042] As can be seen from the above, the first arc plate 101 and the second arc plate 102 are fixed to the trunk by the fastening bolts 103 arranged at the front and rear ends to form an annular structure surrounding the trunk. When the fastening bolts 103 are tightened, the arc pressure plate 107 can fit closely to the surface of the trunk under the buffering action of the spring 106 without causing damage to the trunk due to over-tightening.

[0043] Example 3:

[0044] As attached Figure 5 To the attached Figure 7 As shown, this embodiment is basically the same as the previous embodiment, except that the connecting member 2 includes a connecting plate 201, connecting grooves 202 are provided on both sides of the connecting plate 201, and limiting holes 203 are provided on the connecting grooves 202 on both sides.

[0045] The assembly component 3 includes an assembly plate 301, a connecting rod 302, a fixing block 303, and a connecting hole 304. The connecting rods 302 are provided on both sides of the upper and lower ends of the assembly plate 301, and the fixing block 303 is provided with a connecting hole 304. The other end of the connecting rod 302 is fixedly connected to the end surface of the fixing block 303 by engaging with the connecting hole 304.

[0046] The assembly component 3 also includes a limit screw 305, a cross bar 306, a hanging rod 307 and a through hole 308. The limit screw 305 is passed through the fixed block 303, and the limit screw 305 cooperates with the limit hole 203. The cross bar 306 is arranged on the upper part of the assembly plate 301, and a hanging rod 307 is provided on one side of the cross bar 306. The middle part of the assembly plate 301 is also provided with a through hole 308 that cooperates with the injection module.

[0047] As can be seen from the above, when the assembly component 3 needs to be installed on the connector 2, the operator first aligns the fixing blocks 303 on the upper and lower ends of the assembly plate 301 with the connecting grooves 202 provided on both sides of the connecting plate 201. Then, the fixing blocks 303 are slid along the connecting grooves 202, ensuring that the upper and lower fixing blocks 303 are respectively embedded in the upper and lower connecting grooves 202, thereby achieving preliminary positioning and connection. Next, by rotating the limiting screw 305 until the end of the limiting screw 305 enters the limiting hole 203 provided in the connecting groove 202, the movement of the assembly plate 301 on the connecting plate 201 is effectively restricted, thereby achieving a stable connection and fixation between the assembly plate 301 and the connector 2. The provision of the crossbar 306 and the hanging rod 307 facilitates the connection of the liquid storage box 515, and the through hole 308 provides the necessary channel for the subsequent installation and operation of the injection module.

[0048] Specifically, when the injection assembly 5 needs to be disassembled, the limiting screw 305 is rotated in the opposite direction so that the end of the limiting screw 305 is withdrawn from the limiting hole 203 on the connecting groove 202, thereby releasing the restriction on the movement of the assembly plate 301 on the connecting plate 201. Then, the assembly plate 301 is held and the fixing blocks 303 on both sides of the upper and lower ends are slid out of the connecting grooves 202 on both sides of the connecting plate 201 to complete the disassembly of the assembly assembly 3 and the connecting member 2, thereby completing the disassembly of the entire injection assembly 5 from the fixing assembly 1, which is convenient for carrying.

[0049] Example 4:

[0050] As attached Figure 6 , Attachment Figure 8 To the attached Figure 11 As shown, this embodiment is basically the same as the previous embodiment, with the difference that a mounting groove 401 is provided in the middle of the supporting plate 4 along the direction of the plate body, and limiting sliding grooves 402 are provided on both sides of the mounting groove 401, a first screw rod 403 is installed in the mounting groove 401, and a knob 404 for rotating the first screw rod 403 is provided on the side of the supporting plate 4.

[0051] The injection assembly 5 includes a driving module and an injection module. The driving module is used to drive the injection module to inject the nutrient solution into the fruit tree.

[0052] The driving module includes a driving box 501, a driving gear 502, a fixed seat 503, a second screw rod 504, a guide rod 505, a driven gear 506 and a first movable member 507. The driving box 501 is arranged on the supporting plate 4. One side output end of the driving box 501 is connected to the driving gear 502. Fixed seats 503 are provided on both sides of the top of the driving box 501. A second screw rod 504 is installed between the fixed seats 503 on both sides, and a guide rod 505 is further provided on the front and rear sides of the second screw rod 504. The second screw rod 504 and the guide rod 505 are jointly connected to the first movable member 507. The end of the second screw rod 504 passes through the fixed seat 503 and is connected to the driven gear 506 that meshes with the driving gear 502.

[0053] The injection module includes a mounting plate 508, a syringe 509, a push rod 510, a piston 511, a connecting tube 512, an injection needle 513, a hose 514, a liquid storage box 515 and a one-way valve 516 arranged on the top of the drive box 501. The syringe 509 is fixedly mounted on the mounting plate 508. A push rod 510 is slidably connected to the syringe 509. One end of the push rod 510 is fixedly connected to the first movable member 507, and a piston 511 is provided at the end of the push rod 510 close to the syringe 509. The other end of the syringe 509 is connected to a connecting tube 512, and the other end of the connecting tube 512 is connected to the injection needle 513. The body of the syringe 509 is connected to a hose 514, and the other end of the hose 514 is connected to a liquid storage box 515. The liquid storage box 515 is mounted on the end of the hanging rod 307. The tube bodies of the connecting tube 512 and the hose 514 are both provided with a one-way valve 516.

[0054] The injection assembly 5 also includes a second movable part 517, a slider 518 and a heat dissipation port 519. The second movable part 517 is arranged at the bottom of the drive box 501, and the second movable part 517 is threadedly connected to the outside of the first screw rod 403. The bottom of the drive box 501 is evenly distributed with sliders 518 that cooperate with the limiting slide groove 402, and the heat dissipation port 519 is arranged on the side of the drive box 501 away from the output end.

[0055] As can be seen from the above, by turning the knob 404, the rotation of the first screw rod 403 will drive the second moving member 517 to move along the mounting groove 401, thereby causing the entire injection assembly 5 to slide horizontally on the carrier plate 4, thereby achieving flexible adjustment of the injection position. When the drive module is working, the driving gear 502 connected to the output end of one side of the drive box 501 drives the driven gear 506 engaged therewith to rotate, and the driven gear 506 then drives the second screw rod 504 to rotate. Since the first moving member 507 is connected to the second screw rod 504 and the guide rod 505 at the same time, The rotation of the second screw rod 504 is converted into linear motion of the first movable member 507, thereby pushing the push rod 510 and piston 511 fixedly connected to the first movable member 507 to move within the syringe 509. When the piston 511 moves toward the injection needle 513, negative pressure is generated within the syringe 509. However, due to the one-way conductivity of the one-way valve 516, external air or nutrient solution cannot flow back into the syringe 509 from the connecting tube 512, thereby ensuring a stable negative pressure environment within the syringe 509 and providing power for the injection of the nutrient solution. At the same time, as the piston 511 moves, the nutrient solution in the syringe 509 is squeezed through the connecting tube 512 and injection needle 513, and accurately injected into the fruit tree. On the other hand, another one-way valve 516 at the connection between syringe 509 and hose 514 is responsible for the continuous supply of nutrient solution. Hose 514 connects syringe 509 and liquid reservoir 515. When the nutrient solution in syringe 509 is injected, the pressure in syringe 509 decreases. At this time, the one-way valve 516 opens due to the pressure difference, allowing the nutrient solution in liquid reservoir 515 to flow into syringe 509 through hose 514, replenishing the nutrient solution in syringe 509. Due to the unidirectional conductivity of one-way valve 516, the nutrient solution will not flow back from syringe 509 to liquid reservoir 515, thus ensuring a continuous and stable supply of nutrient solution. Through the precise coordination of these two one-way valves 516, push rod 510, and piston 511, the device achieves automatic and stable injection of nutrient solution. During the injection process, the one-way valve 516 ensures the one-way flow of the nutrient solution, preventing the backflow of the nutrient solution and the entry of air; while the other one-way valve 516 ensures the continuous supply of nutrient solution, so that the injection process can be carried out continuously and stably, which not only improves the accuracy and efficiency of the injection, but also reduces the burden of manual operation. It is particularly suitable for fruit tree nutrient solution injection operations in outdoor environments such as orchards.

[0056] Working principle: When in use, the operator places the first arc plate 101 and the second arc plate 102 at the appropriate position of the fruit tree trunk, and fixes the two to the trunk through the fastening bolts 103 set at the front and rear ends. Then, the operator aligns the fixing blocks 303 on both sides of the upper and lower ends of the assembly plate 301 with the connecting grooves 202 opened on both sides of the connecting plate 201, and slides the fixing blocks 303 along the connecting grooves 202 so that the fixing blocks 303 at the upper and lower ends are respectively embedded in the connecting grooves 202 at the upper and lower ends to achieve preliminary positioning and connection. Then, rotate the limiting screw 305 until the end of the limiting screw 305 enters the limiting hole 203 set on the connecting groove 202, limiting the movement of the assembly plate 301 on the connecting plate 201, completing the firm connection and fixation between the assembly plate 301 and the connecting piece 2, and then according to the actual growth situation of the fruit tree and injection requirements, turn the knob 404 to rotate the first screw rod 403 to drive the second moving part 517 moves along the mounting groove 401, thereby causing the entire injection assembly 5 to slide horizontally on the carrier plate 4, realizing flexible adjustment of the injection position, and then starting the driving module, and the driving gear 502 connected to the output end of one side of the driving box 501 drives the driven gear 506 engaged therewith to rotate, and the driven gear 506 then drives the second screw rod 504 to rotate. Since the first moving member 507 is connected to the second screw rod 504 and the guide rod 505 at the same time, the rotation of the second screw rod 504 will be converted into a linear motion of the first moving member 507, thereby pushing the push rod 510 and the piston 511 fixedly connected to the first moving member 507 to move in the syringe 509. When the piston 511 moves toward the injection needle 513, negative pressure is generated in the syringe 509, but due to the unidirectional conductivity of the one-way valve 516, external air or nutrient solution cannot flow back to the syringe 509 from the connecting tube 512, forming a stable negative pressure environment, providing power for the injection of nutrient solution. As piston 511 moves, the nutrient solution in syringe 509 is squeezed through connecting tube 512 and injection needle 513, precisely injecting it into the fruit tree. Once the nutrient solution in syringe 509 is injected, the pressure inside syringe 509 decreases. At this point, the one-way valve 516 at the connection between syringe 509 and hose 514 opens due to the pressure differential, allowing the nutrient solution in reservoir 515 to flow through hose 514 into syringe 509, replenishing the nutrient solution in syringe 509 and ensuring a continuous and stable supply of nutrient solution. This significantly reduces the burden of manual operation and improves the efficiency of nutrient solution injection operations for fruit trees.

[0057] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Any changes, modifications, replacements and variations of the above embodiments by ordinary technicians in this field within the scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A portable negative pressure injection device for fruit tree nutrient solution, characterized by: The invention comprises a fixing component (1), an assembly component (3) and an injection component (5), wherein the fixing component (1) is provided with two groups corresponding to each other at the upper and lower ends and is used to fix the injection component (5) on the trunk of a fruit tree, and the outer sides of the upper and lower fixing components (1) are provided with connecting pieces (2), the assembly component (3) cooperates with the connecting pieces (2) and is provided beside the fixing component (1), the side of the assembly component (3) is connected to a bearing plate (4), and the injection component (5) can be adjusted and provided on the bearing plate (4); The assembly component (3) comprises an assembly plate (301), a connecting rod (302), a fixing block (303) and a connecting hole (304); the upper and lower ends of the assembly plate (301) are provided with connecting rods (302) respectively; the fixing block (303) is provided with a connecting hole (304) respectively; the other end of the connecting rod (302) is fixedly connected to the end face of the fixing block (303) by cooperating with the connecting hole (304); The injection assembly (5) comprises a driving module and an injection module, wherein the driving module is used to drive the injection module to inject the nutrient solution into the fruit tree.

2. A portable negative pressure injection device for fruit tree nutrient solution according to claim 1, characterized in that: The fixing assembly (1) comprises a first arc plate (101), a second arc plate (102), a fastening bolt (103), a mounting hole (104), a fastening rod (105), a spring (106) and an arc-shaped pressure plate (107); the first arc plate (101) and the second arc plate (102) are fixed to the trunk by fastening bolts (103) provided at the front and rear ends; a plurality of mounting holes (104) are equidistantly provided on the circumference of the first arc plate (101) and the second arc plate (102); a fastening rod (105) is provided on each of the plurality of mounting holes (104); the spring (106) is provided at one end of the fastening rod (105) facing the trunk; and the other end of the spring (106) is provided with an arc-shaped pressure plate (107) in contact with the trunk.

3. The portable negative pressure injection device for fruit tree nutrient solution according to claim 1, characterized in that: The connecting member (2) comprises a connecting plate (201), both sides of the connecting plate (201) are provided with connecting grooves (202), and the connecting grooves (202) on both sides are provided with limiting holes (203).

4. The portable negative pressure injection device for fruit tree nutrient solution according to claim 1, characterized in that: The assembly component (3) further comprises a limiting screw (305), a cross bar (306), a hanging rod (307) and a through hole (308); the limiting screw (305) is passed through the fixing block (303); the limiting screw (305) is matched with the limiting hole (203); the cross bar (306) is arranged on the upper part of the assembly plate (301), and a hanging rod (307) is provided on one side of the cross bar (306); and a through hole (308) matched with the injection mold is further provided in the middle of the assembly plate (301).

5. The portable negative pressure injection device for fruit tree nutrient solution according to claim 1, characterized in that: The driving module comprises a driving box (501), a driving gear (502), a fixing seat (503), a second screw rod (504), a guide rod (505), a driven gear (506) and a first moving member (507). The driving box (501) is arranged on a carrying plate (4). An output end on one side of the driving box (501) is connected to the driving gear (502). Fixed seats (503) are correspondingly provided on both sides of the top of the driving box (501). A second screw rod (504) is installed between the fixed seats (503) on both sides. Guide rods (505) are further provided on the front and rear sides of the second screw rod (504). The second screw rod (504) and the guide rod (505) are commonly connected to the first moving member (507). The end of the second screw rod (504) passes through the fixing seat (503) and is connected to a driven gear (506) meshing with the driving gear (502).

6. The portable negative pressure injection device for nutrient solution for fruit trees according to claim 1, characterized in that: The injection module comprises a mounting plate (508) arranged on the top of the drive box (501), a syringe (509), a push rod (510), a piston (511), a connecting pipe (512), an injection needle (513), a hose (514), a liquid storage box (515) and a one-way valve (516), wherein the syringe (509) is fixedly mounted on the mounting plate (508), a push rod (510) is slidably connected in the syringe (509), one end of the push rod (510) is fixedly connected to the first moving member (507), and the push rod (510) is fixedly connected to the first moving member (507). 10) A piston (511) is provided near one end of the syringe (509), the other end of the syringe (509) is connected to a connecting tube (512), and the other end of the connecting tube (512) is connected to an injection needle (513), the barrel of the syringe (509) is connected to a hose (514), the other end of the hose (514) is connected to a liquid storage box (515), and the liquid storage box (515) is installed at the end of the hanging rod (307), and the barrels of the connecting tube (512) and the hose (514) are both provided with a one-way valve (516).

7. The portable negative pressure injection device for fruit tree nutrient solution according to claim 1, characterized in that: A mounting groove (401) is provided in the middle of the supporting plate (4) along the plate body direction, and limiting sliding grooves (402) are correspondingly provided on both sides of the mounting groove (401). A first screw rod (403) is installed in the mounting groove (401), and a knob (404) for rotating the first screw rod (403) is provided on the side of the supporting plate (4).

8. The portable negative pressure injection device for fruit tree nutrient solution according to claim 1, characterized in that: The injection assembly (5) further comprises a second movable member (517), a slider (518) and a heat dissipation port (519); the second movable member (517) is arranged at the bottom of the drive box (501), and the second movable member (517) is threadedly connected to the outside of the first screw rod (403); sliders (518) that cooperate with the limiting slide groove (402) are evenly distributed on the bottom of the drive box (501); and the heat dissipation port (519) is arranged on a side of the drive box (501) away from the output end.

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