Leakage-proof connector suitable for agricultural pesticide sprayer

Abstract

The utility model provides a leakproof joint suitable for an agricultural insecticide sprayer, which comprises a connecting main pipe, a first branch pipe communicated with the inside of the connecting main pipe is arranged on the bottom surface of the connecting main pipe, a hollow base is connected to the lower end of the first branch pipe, an upper backflow groove is arranged on the upper portion of the hollow base, and an inlet of the upper backflow groove is communicated with the lower end of the first branch pipe. An outlet of the upper backflow groove is communicated with a cavity in the hollow base, a micro motor is installed on the side wall of the hollow base, the tail end of a motor shaft of the micro motor extends into the cavity in the hollow base and is connected with a sealing baffle, the sealing baffle can rotate to seal the outlet of the upper backflow groove, and a lower backflow groove is formed in the lower portion of the hollow base. An inlet of the lower backflow groove is communicated with a cavity in the hollow base, an outlet of the lower backflow groove is connected with a rubber air bag through a second branch pipe, and a one-way air valve is arranged on the rubber air bag. According to the pesticide sprayer, residual pesticide liquid inside when the connecting main pipe is separated from the pesticide sprayer pump head can be sucked through the rubber air bag, and pollution to the outside of the connector pipeline and the human body is avoided.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery and supplies technology, specifically to a leak-proof connector suitable for agricultural spraying machines. Background Technology

[0002] Pesticides are chemicals used to remove weeds or kill pests when growing crops, while agricultural sprayers are machines specifically designed for spraying pesticides. They are agricultural machines that disperse liquids and are a type of agricultural spraying machinery. Their development has brought great convenience to people when spraying pesticides on agricultural products, and their types and quantities are increasing day by day. Commonly used sprayers are generally divided into backpack type and handcart type.

[0003] The pump head is one of the core components of a pesticide sprayer, and its performance directly affects the spraying effect and the durability of the equipment. The main function of the pump head is to provide a stable high-pressure water flow or pesticide solution, ensuring that the pesticide is sprayed evenly on the crops to achieve the effect of controlling pests and diseases. During use, the pump head seals are prone to aging, wear, or damage, causing the pesticide solution to leak from the seal, resulting in water leakage. In other words, a poorly sealed pump head is one of the most common causes of pump head leakage, and the traditional solution is usually to replace the seals. The inventors of this application have discovered through research that when disassembling the pump head to replace the seals, residual pesticide solution can leak from the inside of the connector pipe connected to the pump head, directly contaminating the outside of the connector pipe and the human body. Some pesticides can affect the human nervous system, causing symptoms such as dizziness, nausea, vomiting, insomnia, headache, convulsions, and coma. Long-term exposure may increase the risk of cancer. Utility Model Content

[0004] In response to the technical problem that when the pump head is disassembled and the seal is replaced due to water leakage, residual pesticide will flow out from the inside of the joint pipe connected to the pump head, thus directly polluting the outside of the joint pipe and the human body, this utility model provides a leak-proof joint suitable for agricultural spraying machines.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A leak-proof connector suitable for agricultural sprayers includes a main connecting pipe, a first branch pipe communicating with the interior of the main connecting pipe on its bottom surface, an inner hollow base connected to the lower end of the first branch pipe, an upper reflux groove on the upper part of the inner hollow base, an inlet of the upper reflux groove communicating with the lower end of the first branch pipe, an outlet of the upper reflux groove communicating with the cavity inside the inner hollow base, a micro motor mounted on the side wall of the inner hollow base, the end of the motor shaft of the micro motor extending into the cavity inside the inner hollow base and connected to a sealing baffle, the sealing baffle being rotatable to seal the outlet of the upper reflux groove, a lower reflux groove on the lower part of the inner hollow base, an inlet of the lower reflux groove communicating with the cavity inside the inner hollow base, and a rubber air bladder connected to the outlet of the lower reflux groove via a second branch pipe, the rubber air bladder being equipped with a one-way valve.

[0007] Compared with the prior art, the leak-proof connector provided by this utility model for agricultural sprayers is designed so that one end of the connecting pipe is first connected to the outlet of the sprayer pump head, and the other end is connected to the sprayer nozzle through a pipe. Under normal spraying conditions, the micro motor drives the sealing baffle to rotate through the motor shaft to seal the outlet of the upper return groove, preventing the liquid pesticide flowing through the connecting pipe from entering the cavity inside the hollow base from the upper return groove. At this time, the gas inside the rubber airbag is discharged through the one-way valve by pressing the rubber airbag, so that the rubber airbag is in a contracted state. When the pump head needs to be disassembled and the seal is replaced, the micro motor first drives the sealing baffle to rotate through the motor shaft, releasing the seal of the sealing baffle on the outlet of the upper return groove. Then the rubber airbag contacts the air inside the connecting pipe to recover and expand, and draws in the residual liquid pesticide. This effectively prevents the residual liquid pesticide inside from flowing out when the connecting pipe is separated from the sprayer pump head, directly contaminating the outside of the connector pipe and the human body, thereby improving the safety when disassembling and replacing the seal of the sprayer pump head.

[0008] Furthermore, the upper and lower reflux channels are arranged opposite each other on the upper and lower parts of the hollow base, and the sealing baffle and the circumferential surface of the motor shaft are tightly fitted with sealing rings.

[0009] Furthermore, the rubber airbag and the second branch pipe are connected by a threaded seal.

[0010] Furthermore, the one-way air valve is located at the lower end of the rubber airbag. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the anti-leakage connector structure suitable for agricultural spraying machines provided by this utility model.

[0012] Figure 2 This is a cross-sectional view of the leak-proof connector suitable for agricultural spraying machines provided by this utility model.

[0013] In the diagram, 1. Connecting main pipe; 2. First branch pipe; 3. Hollow base; 31. Upper reflux groove; 32. Lower reflux groove; 4. Micro motor; 41. Motor shaft; 5. Sealing baffle; 6. Second branch pipe; 7. Rubber airbag; 8. One-way air valve; 9. Sealing ring. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0015] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 do not 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. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0017] Please refer to Figure 1 and Figure 2As shown, this utility model provides a leak-proof connector suitable for agricultural sprayers, including a main connecting pipe 1. The bottom surface of the main connecting pipe 1 is provided with a first branch pipe 2 communicating with the interior of the main connecting pipe. The lower end of the first branch pipe 2 is connected to an inner hollow base 3. An upper return groove 31 is provided on the upper part of the inner hollow base 3. The inlet of the upper return groove 31 is connected to the lower end of the first branch pipe 3, and the outlet of the upper return groove 31 is connected to the cavity inside the inner hollow base 1. That is, the two ends of the upper return groove 31 are respectively connected to the first branch pipe 3 and the inner cavity of the inner hollow base 1. A micro motor 4 is installed on the side wall of the inner hollow base 3. The micro motor 4 is powered by an external power supply. The end of the motor shaft 41 of the micro motor 4 is... A cavity extending into the hollow base 3 is connected to a sealing baffle 5. The sealing baffle 5 can rotate to seal the outlet of the upper reflux channel 31. Specifically, the micro motor 4 can rotate 180 degrees each time, so that the sealing baffle 5 can block or allow flow at the outlet of the upper reflux channel 31 with each rotation. That is, the sealing baffle 5 can switch between the blocked and flow states at the outlet of the upper reflux channel 31 with each rotation. A lower reflux channel 32 is provided at the bottom of the hollow base 3. The inlet of the lower reflux channel 32 is connected to the cavity inside the hollow base 3. The outlet of the lower reflux channel 32 is connected to a rubber airbag 7 through a second branch pipe 6. A one-way air valve 8 is provided on the rubber airbag 7.

[0018] Compared with the prior art, the leak-proof connector provided by this utility model for agricultural sprayers is designed so that one end of the connecting pipe is first connected to the outlet of the sprayer pump head, and the other end is connected to the sprayer nozzle through a pipe. Under normal spraying conditions, the micro motor drives the sealing baffle to rotate through the motor shaft to seal the outlet of the upper return groove, preventing the liquid pesticide flowing through the connecting pipe from entering the cavity inside the hollow base from the upper return groove. At this time, the gas inside the rubber airbag is discharged through the one-way valve by pressing the rubber airbag, so that the rubber airbag is in a contracted state. When the pump head needs to be disassembled and the seal is replaced, the micro motor first drives the sealing baffle to rotate through the motor shaft, releasing the seal of the sealing baffle on the outlet of the upper return groove. Then the rubber airbag contacts the air inside the connecting pipe to recover and expand, and draws in the residual liquid pesticide. This effectively prevents the residual liquid pesticide inside from flowing out when the connecting pipe is separated from the sprayer pump head, directly contaminating the outside of the connector pipe and the human body, thereby improving the safety when disassembling and replacing the seal of the sprayer pump head.

[0019] For a specific embodiment, please refer to Figure 2As shown, the upper reflux groove 31 and the lower reflux groove 32 are arranged opposite each other on the upper and lower parts of the hollow base 3. The sealing baffle 5 and the circumferential surface of the motor shaft 41 are tightly fitted with sealing rings 9, which can improve the sealing performance between the internal cavity of the hollow base 3 and the upper reflux groove 31 and the lower reflux groove 32. When the sealing baffle 5 is rotated under the drive of the micro motor 5 to seal the outlet of the upper reflux groove 31, the gas inside the rubber airbag 7 can be better pressed out.

[0020] In a specific embodiment, the rubber airbag 7 and the second branch pipe 6 are connected by a threaded seal. Specifically, an internal thread can be provided on the inner wall of the rubber airbag 7 and an external thread can be provided on the outer wall of the second branch pipe 6. The threaded seal connection is achieved by the cooperation of the external thread and the internal thread, which facilitates the disassembly of the rubber airbag 7 and the discharge of the medicine sucked inside.

[0021] For a specific embodiment, please refer to Figure 2 As shown, the one-way air valve 8 is located at the lower end of the rubber airbag 7, thereby allowing the rubber airbag 7 to be pressed more effectively to expel as much gas as possible from its interior.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A leak-proof connector suitable for agricultural sprayers, comprising a connecting main pipe (1), characterized in that, The bottom surface of the connecting main pipe (1) is provided with a first branch pipe (2) communicating with the interior of the connecting main pipe (1). The lower end of the first branch pipe (2) is connected to an inner hollow base (3). An upper return groove (31) is opened on the upper part of the inner hollow base (3). The inlet of the upper return groove (31) is connected to the lower end of the first branch pipe (2). The outlet of the upper return groove (31) is connected to the cavity inside the inner hollow base (3). A micro motor (4) is installed on the side wall of the inner hollow base (3). The electric motor (4) is powered by the micro motor. The end of the shaft (41) extends into the cavity inside the hollow base (3) and is connected to a sealing baffle (5). The sealing baffle (5) can be rotated to seal the outlet of the upper return groove (31). The lower part of the hollow base (3) is provided with a lower return groove (32). The inlet of the lower return groove (32) is connected to the cavity inside the hollow base (3). The outlet of the lower return groove (32) is connected to a rubber air bag (7) through a second branch pipe (6). A one-way air valve (8) is provided on the rubber air bag (7).

2. The leak-proof connector suitable for agricultural sprayers according to claim 1, characterized in that, The upper reflux groove (31) and the lower reflux groove (32) are arranged opposite to each other on the upper and lower parts of the hollow base (3), and the sealing baffle (5) and the circumferential surface of the motor shaft (41) are tightly fitted with sealing rings (9).

3. The leak-proof connector suitable for agricultural sprayers according to claim 1, characterized in that, The rubber airbag (7) and the second branch pipe (6) are connected by a threaded seal.

4. The leak-proof connector suitable for agricultural sprayers according to claim 1, characterized in that, The one-way air valve (8) is located at the lower end of the rubber airbag (7).

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