Seed leakage prevention sealing structure of pneumatic seed-metering pipe

Abstract

The utility model relates to the technical field of agricultural machinery, and discloses a pneumatic seed-metering pipe seed leakage prevention sealing structure, which comprises a pipe body, a tail pipe and a first rubber ring, the inner wall of the pipe body is provided with a first embedding groove, the left side of the outer wall of the pipe body is provided with a fixing hole, the periphery of the outer wall of the first rubber ring is fixedly connected with a clamping block, and the clamping block is fixedly connected with the tail pipe. A second embedding groove is formed in the outer wall of the tail pipe, a threaded pipe is fixedly connected to the left side of the outer wall of the first rubber ring, a nut is in threaded connection to the outer wall of the threaded pipe, and a placing hoop is fixedly connected to the left side of the outer wall of the pipe body. According to the utility model, the notches are respectively formed in the pipe body and the tail pipe for placing the first sealing ring, after the pipe body and the tail pipe are clamped, the gap between the first sealing ring and the notches is shrunk by pressing the air inflation bag, and when disassembly and maintenance are needed, the air valve on the left side of the air inflation bag is twisted, and then the sealing ring is in an air leakage state; and the nut can be independently dismounted for maintenance by twisting the nut.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a pneumatic seed metering pipe anti-leakage sealing structure. Background Technology

[0002] The pneumatic seed metering tube is a core component of seeding machinery. It precisely delivers seeds to a predetermined position through airflow, offering advantages such as uniform sowing and high efficiency. Currently, it is used in wheat, corn, and soybean cultivation. This device utilizes air pressure differences to achieve orderly seed flow, ensuring stable and reliable field operation quality. The sealing structure of the pneumatic seed metering tube directly affects airflow stability and sowing accuracy. It adopts a multi-layer flexible material nesting design, combined with a dynamic pressure compensation mechanism, which can adapt to complex vibration environments and effectively isolate external impurities. By optimizing the contact surface morphology and the wear resistance of the sealing material, it significantly extends the service life of the equipment and improves operational continuity.

[0003] Traditional pneumatic seeding pipe sealing structures utilize the compression and rebound properties of rubber to maintain the stability of the sealing interface. This structure can meet basic sealing requirements under low-load conditions. However, in actual use, because rubber materials are easily affected by mechanical vibration and temperature changes, permanent deformation and surface cracking will occur after long-term operation, leading to a decrease in sealing pressure and periodic air leakage.

[0004] Existing technologies employ a multi-layer composite sealing ring and a pressure compensation chamber design. By dynamically adjusting the outward expansion of the sealing ring through pressure fluctuations within the chamber, a dynamic balance is achieved between the sealing pressure and airflow changes within the seeding pipe. While this approach improves sealing stability to some extent, in practical use, the sealing components and the pipe body are often integrated into a fixed structure. When external impurities intrude into the sealing surface and cause damage, operators must disassemble and replace the entire unit for maintenance. This not only prolongs maintenance time but also damages the pipe threads due to repeated disassembly and reassembly, further reducing the equipment's lifespan and the continuity of seeding operations. Therefore, a pneumatic seeding pipe anti-leakage sealing structure is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a pneumatic seed metering pipe anti-leakage sealing structure, which aims to improve the problem that the sealing structure of the seed metering pipe in the prior art cannot be disassembled independently.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a pneumatic seed metering pipe anti-leakage sealing structure, comprising a pipe body, a tail pipe, and a first rubber ring. The inner wall of the pipe body has a first embedding groove, and the left side of the outer wall of the pipe body has a fixing hole. All four sides of the outer wall of the first rubber ring are fixedly connected with locking blocks. The outer wall of the tail pipe has a second embedding groove. A threaded pipe is fixedly connected to the left side of the outer wall of the first rubber ring, and a nut is threaded onto the outer wall of the threaded pipe. A placement clamp is fixedly connected to the left side of the outer wall of the pipe body. A flexible hose is connected to the left end of the outer wall of the threaded pipe, and an air valve is connected to the right end of the outer wall of the flexible hose. An air inflator is fixedly connected to the right side of the outer wall of the air valve. A running component is provided at the top of the outer wall of the pipe body, and a driving component is provided at the top of the pipe body. An adaptive mechanism is provided on the inner wall of the first rubber ring. The adaptive mechanism is used to form dynamic sealing compensation when the position and shape of the seed metering pipe undergo slight changes.

[0007] As a further description of the above technical solution:

[0008] The adaptive mechanism includes an anti-corrosion layer, the outer wall of which is fixedly connected to the inner wall of a first rubber ring, an elastomer coating fixedly connected to the inner wall of the anti-corrosion layer, a second rubber ring fixedly connected to the inner wall of the elastomer coating, a hollow layer inside the first rubber ring, and a spring fixedly connected to the inner wall of the second rubber ring.

[0009] As a further description of the above technical solution:

[0010] The operating component includes a seed metering chamber, the bottom of which is fixedly connected to the top of the outer wall of the tube, and a seed inlet is fixedly connected to the rear side of the outer wall of the seed metering chamber.

[0011] As a further description of the above technical solution:

[0012] The drive assembly includes a base, the rear side of the outer wall of the base is fixedly connected to the front side of the outer wall of the seeding chamber, and a coupling is fixedly connected to the front side of the outer wall of the base.

[0013] As a further description of the above technical solution:

[0014] A fixing frame is fixedly connected to the right side of the outer wall of the seeding chamber, and multiple fixing parts are fixedly connected to the front and rear sides of the outer wall of the fixing frame.

[0015] As a further description of the above technical solution:

[0016] Multiple indicator lights are fixedly connected to the top of the outer wall of the coupling, and the multiple indicator lights are arranged at equal intervals.

[0017] As a further description of the above technical solution:

[0018] A handle is fixedly connected to the top of the outer wall of the seeding chamber, and a silicone pad is fixedly connected to the outer wall of the handle.

[0019] As a further description of the above technical solution:

[0020] An indicator strip is fixedly connected to the rear side of the outer wall of the seeding chamber, and the surface of the indicator strip is rounded.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, a first sealing ring is placed in a slot in the tube body and the tail tube respectively. The first sealing ring adopts a hollow design. After the tube body and the tail tube are engaged, gas is injected into the first sealing ring through the hose by pressing the far-end inflation bladder, thereby further reducing the gap between the first sealing ring and the slot. When it is necessary to remove and maintain, it is only necessary to turn the air valve located on the left side of the inflation bladder. Then the sealing ring is in a deflated state, and it can be removed and maintained independently by turning the nut.

[0023] 2. In this utility model, the first sealing ring is provided with a multi-layer structure. The outer layer is designed with an anti-corrosion layer to improve the corrosion resistance of the sealing ring. Secondly, an elastomer coating is designed to provide a certain elastic compensation effect when the gas in the first sealing ring is insufficient. The interior is hollow, and multiple sets of springs and a rubber sealing ring are set in the hollow layer. Thus, the internal structures together improve the self-adaptive ability of the first sealing ring and provide dynamic compensation for itself when necessary to ensure the sealing of the pipe body. Attached Figure Description

[0024] Figure 1 This is a perspective view of a pneumatic seed metering pipe anti-leakage sealing structure proposed in this utility model;

[0025] Figure 2 This is a front view of a pneumatic seed metering pipe anti-leakage sealing structure proposed in this utility model;

[0026] Figure 3 This is a rear view of a pneumatic seed metering pipe anti-leakage sealing structure proposed in this utility model;

[0027] Figure 4 This is an exploded view of the pipe body of the pneumatic seed metering pipe anti-leakage sealing structure proposed in this utility model;

[0028] Figure 5 This is a cross-sectional view of the adaptive mechanism of a pneumatic seed metering pipe anti-leakage sealing structure proposed in this utility model.

[0029] Legend:

[0030] 1. Pipe body; 2. Adaptive mechanism; 201. Anti-corrosion layer; 202. Second rubber ring; 203. Elastomer coating; 204. Spring; 205. Hollow layer; 3. Tail tube; 4. First rubber ring; 5. Clamping block; 6. First embedding groove; 7. Nut; 8. Threaded pipe; 9. Fixing hole; 10. Placement clamp; 11. Hose; 12. Air valve; 13. Inflation bladder; 14. Second embedding groove; 15. Seed dispensing chamber; 16. Seed inlet; 17. Base; 18. Coupling; 19. Fixing frame; 20. Fixing component; 21. Indicator light; 22. Handle; 23. Silicone pad; 24. Indicator strip. Detailed Implementation

[0031] 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.

[0032] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of a pneumatic seed metering pipe with a leak-proof sealing structure, comprising a pipe body 1, a tail pipe 3, and a first rubber ring 4. The inner wall of the pipe body 1 has a first embedding groove 6. The first rubber ring 4 is used to seal key parts of the pipe body 1. The tail pipe 3 is the tail end of the pipe body 1. The pipe body 1 is a key component for accurately conveying seeds from a storage device to a predetermined position in the soil, ensuring uniform sowing and consistent depth. A fixing hole 9 is provided on the left side of the outer wall of the pipe body 1. Locking blocks 5 are fixedly connected to all four sides of the outer wall of the first rubber ring 4. A second embedding groove 14 is provided on the outer wall of the tail pipe 3. A threaded connection is fixedly connected to the left side of the outer wall of the first rubber ring 4. Pipe 8 and fixing hole 9 are used to fix threaded pipe 8 to ensure the stability of its connection device during operation. The locking block 5 cooperates with the first embedded groove 6 to further reinforce the sealing ring in its position, preventing it from falling off or loosening. A nut 7 is threaded onto the outer wall of threaded pipe 8. Threaded pipe 8 is used to connect to the inflation device; its surface has threads for reinforcement. Nut 7 cooperates with threaded pipe 8 to ensure its stability at fixing hole 9. A placement clamp 10 is fixedly connected to the left side of the outer wall of pipe body 1. A flexible hose 11 is connected to the left end of the outer wall of threaded pipe 8. Flexible hose 11 is the medium through which airflow enters the first sealing ring. The placement clamp... 10 is a flexible hose 11 for placement when not in use. A valve 12 is connected to the right end of the outer wall of the flexible hose 11. The valve 12 controls the holding and outflow of gas within the sealing ring. An inflation bladder 13 is fixedly connected to the right side of the outer wall of the valve 12, used to inflate the sealing ring with gas. A running assembly is located at the top of the outer wall of the tube body 1. This assembly includes a seed dispensing chamber 15. The bottom of the outer wall of the seed dispensing chamber 15 is fixedly connected to the top of the outer wall of the tube body 1. A seed inlet 16 is fixedly connected to the rear side of the outer wall of the seed dispensing chamber 15, responsible for controlling the orderly entry of seeds into the tube body 1. Precise control of the seeding flow rate is achieved by adjusting the inlet opening and the guiding structure, preventing seed accumulation. Or blockage, the top of the tube body 1 is provided with a drive assembly, the drive assembly includes a base 17, the rear side of the outer wall of the base 17 is fixedly connected to the front side of the outer wall of the seed metering cavity 15, and the front side of the outer wall of the base 17 is fixedly connected with a coupling 18, the main function of which is to connect the drive shaft and the transmission components of the seed metering device, transmit power and compensate for axial, radial or angular deviations, ensure that the seed metering device can still operate smoothly under vibration or installation error, and ensure the sowing accuracy and mechanical transmission stability. The base 17 is used to fix the coupling 18. The inner wall of the first rubber ring 4 is provided with an adaptive mechanism 2. The adaptive mechanism 2 is used to form dynamic sealing compensation when the position and shape of the seed metering tube change slightly.

[0033] Specifically, a first embedding groove 6 is formed on the inner wall of the tube body 1, and a first rubber ring 4 is used to seal key parts of the tube body 1. The tail tube 3, as the tail end of the tube body 1, is responsible for the core function of accurately transporting seeds from the storage device to the predetermined position in the soil, ensuring uniformity and depth of sowing. A fixing hole 9 is formed on the left side of the outer wall of the tube body 1, and a locking block 5 is fixedly connected around the outer wall of the first rubber ring 4. A second embedding groove 14 is formed on the outer wall of the tail tube 3, and a threaded tube 8 is fixedly connected to the left side of the outer wall of the first rubber ring 4. The fixing hole 9 is responsible for fixing the threaded tube 8 and maintaining the operational stability of the connection device. The locking block 5 and the first embedding groove... 6. A mating relationship is formed to reinforce the sealing ring in its position, preventing it from falling off or loosening. The outer wall of the threaded tube 8 is connected to the nut 7 via threads. The threaded tube 8 has the function of connecting to the inflation device, and its surface thread structure provides additional reinforcement. The nut 7 works in conjunction with the threaded tube 8 to ensure the connection stability at the fixing hole 9. The left side of the outer wall of the tube body 1 is fixedly connected to the placement clamp 10. The left end of the outer wall of the threaded tube 8 is connected to the hose 11. The hose 11 serves as the medium for airflow to the inside of the first sealing ring. The placement clamp 10 is responsible for placing the hose 11 when it is not in use. The right end of the outer wall of the hose 11 is connected to the air valve 12. Valve 12 is responsible for controlling the holding and outflow of gas inside the sealing ring. An inflation bladder 13 is fixedly connected to the right side of the outer wall of valve 12, and the inflation bladder 13 is responsible for filling the sealing ring with gas. An operating component is installed at the top of the outer wall of pipe body 1. The operating component includes a seed dispensing chamber 15. The bottom of the outer wall of the seed dispensing chamber 15 is fixedly connected to the top of the outer wall of pipe body 1. A seed inlet 16 is fixedly connected to the rear side of the outer wall of the seed dispensing chamber 15. The seed inlet 16 is responsible for controlling the orderly entry of seeds into pipe body 1. Precise control of the seeding flow rate is achieved by adjusting the inlet opening and the guiding structure, preventing seed accumulation and blockage. A drive component is installed at the top of pipe body 1 to drive... The component includes a base 17, the rear side of the outer wall of the base 17 is fixedly connected to the front side of the outer wall of the seed metering chamber 15, and the front side of the outer wall of the base 17 is fixedly connected to a coupling 18. The coupling 18 mainly serves to connect the drive shaft and the transmission components of the seed metering device, transmit power and compensate for axial deviation, radial deviation and angular deviation, to ensure that the seed metering device maintains a stable operating state under vibration and installation error conditions, and to ensure sowing accuracy and mechanical transmission stability. The base 17 is responsible for fixing the coupling 18. The inner wall of the first rubber ring 4 is provided with an adaptive mechanism 2. The adaptive mechanism 2 forms a dynamic sealing compensation mechanism when the position and shape of the seed metering tube change slightly.

[0034] Reference Figure 1 and Figure 5The adaptive mechanism 2 includes an anti-corrosion layer 201, which blocks the corrosion of the sealing material by seed agents, soil chemicals and humid environments, preventing sealing failure, elasticity decay or structural damage caused by corrosion, thereby extending the service life of the sealing ring and maintaining stable airtightness. The outer wall of the anti-corrosion layer 201 is fixedly connected to the inner wall of the first rubber ring 4. An elastomer coating 203 is fixedly connected to the inner wall of the anti-corrosion layer 201. Its high elastic deformation capacity compensates for the micro-unevenness of the sealing surface and the dynamic deformation gap, enhances the sealing interface fit and adaptive adjustment capability, and reduces the friction loss between the sealing ring and the pipe wall contact surface. A second rubber ring 202 is fixedly connected to the inner wall of the elastomer coating 203. A hollow layer 205 is opened inside the first rubber ring 4. The hollow layer 205 is the place where gas is filled. A spring 204 is fixedly connected to the inner wall of the second rubber ring 202. The second rubber ring 202 and the spring 204 cooperate with each other to provide a certain support for the hollow layer 205.

[0035] Specifically, the adaptive mechanism 2 includes an anti-corrosion layer 201, which blocks the corrosion of the sealing material by seed agents, soil chemicals, and humid environments, preventing seal failure, elasticity loss, and structural damage caused by corrosion, thereby extending the service life of the sealing ring and maintaining stable airtightness. The outer wall of the anti-corrosion layer 201 is fixedly connected to the inner wall of the first rubber ring 4, and the inner wall of the anti-corrosion layer 201 is fixedly connected to an elastomer coating 203. The elastomer coating 203 compensates for the micro-unevenness of the sealing surface and dynamic deformation gap through its high elastic deformation capacity, enhancing the sealing interface fit and adaptive adjustment capability, while reducing frictional loss between the sealing ring and the pipe wall. The inner wall of the elastomer coating 203 is fixedly connected to a second rubber ring 202. A hollow layer 205 is opened inside the first rubber ring 4, which serves as a storage space for gas filling. A spring 204 is fixedly connected to the inner wall of the second rubber ring 202. The second rubber ring 202 and the spring 204 work together to support the hollow layer 205.

[0036] Reference Figure 1 , Figure 2 and Figure 3A fixing frame 19 is fixedly connected to the right side of the outer wall of the seeding chamber 15. This frame, through rigid connection and positioning structure, securely installs core components such as the drive shaft and seeding pipe in predetermined positions, suppressing displacement or deformation caused by operational vibration. Multiple fixing parts 20 are fixedly connected to the front and rear sides of the outer wall of the fixing frame 19, assisting the fixing frame 19 and improving device stability. Multiple indicator lights 21 are fixedly connected to the top of the outer wall of the coupling 18. These lights provide real-time feedback on equipment operating status and fault information through color or flashing frequency changes, offering intuitive warning signals in case of abnormal seeding rate, component jamming, or power interruption, assisting operators in quickly locating problems and taking intervention measures. The indicator lights 21 are all arranged at equal intervals. A handle 22 is fixedly connected to the top of the outer wall of the seeding chamber 15, which provides a grip for the operator to facilitate the handling, installation and maintenance of the equipment. Its ergonomic handle design and anti-slip texture can reduce operator fatigue and ensure the stability of the equipment during movement, thereby improving the safety and efficiency of the operation. A silicone pad 23 is fixedly connected to the outer wall of the handle 22 to improve the grip of the handle 22. An indicator strip 24 is fixedly connected to the rear side of the outer wall of the seeding chamber 15 to mark the material feeding inlet for easy use by the operator. The surface of the indicator strip 24 is rounded.

[0037] Specifically, a fixing frame 19 is fixedly connected to the right side of the outer wall of the seeding chamber 15. This frame, through rigid connection and positioning structure, securely installs the drive shaft, seeding pipe, and other core components in predetermined positions, suppressing displacement and deformation caused by operational vibrations. Multiple fixing parts 20 are fixedly connected to the front and rear sides of the outer wall of the fixing frame 19, assisting the fixing frame 19 in achieving multi-directional reinforcement and improving the overall stability of the device. Multiple indicator lights 21 are fixedly connected to the top of the outer wall of the coupling 18. These lights provide real-time feedback on the equipment's operating status and fault information through color changes and differences in flashing frequency. They provide intuitive warning signals in cases of abnormal seeding rate, component jamming, or power interruption, helping operators quickly locate problems and perform intervention operations. The multiple indicator lights 21 are arranged at equal intervals. According to the arrangement principle, a handle 22 is fixedly connected to the top of the outer wall of the seeding chamber 15, which provides a gripping and force application point for the operator, making it convenient for equipment handling, installation, and maintenance. Its ergonomically designed handle contour and anti-slip texture structure can reduce operator fatigue, ensure that the equipment maintains a balanced state during movement, and improve the level of operation safety and efficiency. A silicone pad 23 is fixedly connected to the outer wall of the handle 22. The silicone pad 23 optimizes the grip comfort of the handle 22 through the characteristics of soft material. An indicator strip 24 is fixedly connected to the rear side of the outer wall of the seeding chamber 15. The indicator strip 24 clearly indicates the location of the material feeding inlet through specific identification symbols, making it easy for the operator to quickly identify and execute the operation process. The surface of the indicator strip 24 adopts a smooth arc surface treatment process.

[0038] Working principle: First, slots are made in the tube body 1 and the tail tube 3 to accommodate the first rubber ring 4. The first rubber ring 4 adopts a hollow layer 205 structure. After the tube body 1 and the tail tube 3 are engaged and assembled, gas is injected into the first rubber ring 4 through the hose 11 by pressing the distal inflation bladder 13. This causes the gap between the first rubber ring 4 and the slot to expand and contract, thus compressing the gap. When disassembly and maintenance are required, the air valve 12 on the left side of the inflation bladder 13 is rotated to switch to the deflation mode. The first rubber ring 4 enters the depressurization state. The first rubber ring 4 can be disassembled separately for maintenance by loosening the nut 7.

[0039] Furthermore, the first rubber ring 4 adopts a multi-layer composite structure design. The outer layer is provided with an anti-corrosion layer 201, which uses chemically inert materials to block the penetration of corrosive media and significantly enhances the corrosion resistance of the sealing ring. The middle layer is provided with an elastomer coating 203, which compensates for the micro gaps of the sealing surface based on its high elastic deformation characteristics. When the gas pressure inside the first rubber ring 4 is insufficient, it generates an elastic deformation compensation effect. The inner layer adopts a hollow layer 205 structure. The hollow layer 205 integrates multiple sets of springs 204 and the second rubber ring 202. The springs 204 provide dynamic support for the second rubber ring 202 through their axial expansion and contraction capabilities. The second rubber ring 202 and the springs 204 work together to form a two-way support structure. When the multi-layer structure works together, the anti-corrosion layer 201 resists external erosion, the elastomer coating 203 compensates for pressure fluctuations, and the internal components of the hollow layer 205 realize dynamic adjustment of the sealing surface. Under the vibration and deformation conditions of the pipe body 1, it generates adaptive displacement compensation and maintains the sealing reliability of the connection interface between the pipe body 1 and the tail pipe 3.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A kind of air force type seed tube leak-proof sealing structure, including tube body (1), tail pipe (3) and first rubber ring (4), it is characterized in that: The inner wall of the tube body (1) is provided with a first embedding groove (6), the outer wall of the tube body (1) is provided with a fixing hole (9) on the left side, the outer wall of the first rubber ring (4) is fixedly connected with a locking block (5) on all four sides, the outer wall of the tail tube (3) is provided with a second embedding groove (14), the outer wall of the first rubber ring (4) is fixedly connected with a threaded tube (8), the outer wall of the threaded tube (8) is threadedly connected with a nut (7), the outer wall of the tube body (1) is fixedly connected with a placement hoop (10), the outer wall of the threaded tube (8) is connected to a hose (11), the outer wall of the hose (11) is connected to a valve (12), the outer wall of the valve (12) is fixedly connected to an air bladder (13), the top of the outer wall of the tube body (1) is provided with a running component, the top of the tube body (1) is provided with a driving component, the inner wall of the first rubber ring (4) is provided with an adaptive mechanism (2), the adaptive mechanism (2) is used to form dynamic sealing compensation when the position and shape of the seeding tube change slightly.

2. The seed tube seal according to claim 1, wherein: The adaptive mechanism (2) includes an anti-corrosion layer (201), the outer wall of which is fixedly connected to the inner wall of the first rubber ring (4), the inner wall of which is fixedly connected to an elastomer coating (203), the inner wall of which is fixedly connected to a second rubber ring (202), the first rubber ring (4) having a hollow layer (205) inside, and the inner wall of the second rubber ring (202) having a spring (204) fixedly connected to it.

3. The air-type seed tube anti-leakage sealing structure according to claim 1, characterized in that: The operating component includes a seeding chamber (15), the bottom of the outer wall of the seeding chamber (15) is fixedly connected to the top of the outer wall of the tube (1), and a seed inlet (16) is fixedly connected to the rear side of the outer wall of the seeding chamber (15).

4. The air-type seed tube non-drop seed sealing structure according to claim 3, characterized in that: The drive assembly includes a base (17), the rear side of the outer wall of the base (17) is fixedly connected to the front side of the outer wall of the seeding chamber (15), and a coupling (18) is fixedly connected to the front side of the outer wall of the base (17).

5. The air-type seed tube non-drop seed sealing structure according to claim 3, characterized in that: A fixing frame (19) is fixedly connected to the right side of the outer wall of the seeding cavity (15), and multiple fixing parts (20) are fixedly connected to the front and rear sides of the outer wall of the fixing frame (19).

6. The air-type seed tube non-drop seed sealing structure according to claim 4, characterized in that: Multiple indicator lights (21) are fixedly connected to the top of the outer wall of the coupling (18), and the multiple indicator lights (21) are arranged at equal intervals.

7. The air-type seed tube non-drop seed sealing structure according to claim 3, characterized in that: A handle (22) is fixedly connected to the top of the outer wall of the seeding chamber (15), and a silicone pad (23) is fixedly connected to the outer wall of the handle (22).

8. The air-type seed tube non-drop seed sealing structure according to claim 7, characterized in that: An indicator strip (24) is fixedly connected to the rear side of the outer wall of the seeding chamber (15), and the surface of the indicator strip (24) is rounded.

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