Spray head drip-proof device of agricultural plant protection spraying instrument

Abstract

The utility model relates to the technical field of drip-proof spray heads, in particular to a spray head drip-proof device of an agricultural plant protection spraying instrument, which comprises a conveying pipe, a plurality of spray nozzles arranged at equal intervals are arranged on the conveying pipe, and a water outlet pipe is fixedly mounted at the water inlet end of each spray nozzle. A supporting disc and a limiting sleeve are sequentially and fixedly installed on the inner wall of the water outlet pipe from top to bottom, a rubber sleeve is fixedly installed on the bottom face of the limiting sleeve, a plugging ball is arranged below the limiting sleeve, a guide rod is fixedly installed at the top of the plugging ball, the guide rod penetrates through the supporting disc and is in sliding connection with the supporting disc, and a limiting disc is fixedly installed at the top end of the guide rod; the limiting disc is located above the supporting disc, a spring is fixedly installed between the limiting disc and the supporting disc and surrounds the guide rod, a plurality of water through holes which are annularly arranged at equal intervals are formed in the supporting disc, and the plugging ball abuts against the bottom face of the rubber sleeve. The utility model has the effect of drip-proof protection, is not easy to leak, and is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-drip nozzles, and specifically, to a drip-proof device for the nozzle of an agricultural plant protection spraying instrument. Background Technique

[0002] In agricultural and forestry production, plant protection is an important link to ensure high yields and bumper harvests of crops. With the development of modern agricultural technology, chemical pesticide spraying, as one of the main means of pest control, directly affects the growth and final yield of crops. When carrying out agricultural plant protection spraying operations, corresponding spraying instruments are usually used, and there are many types of spraying instruments on the market.

[0003] Existing agricultural plant protection spraying instruments mainly include parts such as a sprayer, a nozzle, and a conveying pipeline. The sprayer generates pressure through a pressurization system, transports the pesticide solution to the nozzle, forms droplets through the nozzle and sprays them onto the plant surface. However, during the process of the nozzle spraying the liquid medicine, when there is a temporary stop in the liquid medicine transportation, such as when the plant protection area is large and the spraying site needs to be changed, etc., this transfer process requires pausing the spraying operation. At this time, since there is still a lot of liquid medicine remaining in the nozzle and the pipeline, this part of the liquid medicine will still drip out under the action of its own gravity. During the dripping process of this part of the remaining liquid medicine, it is easy to cause the liquid medicine to drip on other plants or other objects, resulting in pollution, and it cannot achieve the effect of timely preventing the nozzle from dripping and protecting. The staff also needs to observe the dripping situation of the liquid medicine in a timely manner to avoid dripping on external objects, which brings inconvenience to the user. In view of this, we have proposed a drip-proof device for the nozzle of an agricultural plant protection spraying instrument. Content of the Utility Model

[0004] The purpose of the present utility model is to provide a drip-proof device for the nozzle of an agricultural plant protection spraying instrument to solve the defects mentioned in the above background technique.

[0005] To achieve the above purpose, the present utility model provides the following technical solutions:

[0006] A drip-proof device for the nozzle of an agricultural plant protection spraying instrument, comprising a delivery pipe, on which a plurality of nozzles arranged at equal intervals are provided. The water inlet end of the nozzle is fixedly installed with a water outlet pipe. On the inner wall of the water outlet pipe, a support plate and a limit sleeve are fixedly installed in sequence from top to bottom. A rubber sleeve is fixedly installed on the bottom surface of the limit sleeve. A plugging ball is arranged below the limit sleeve. A guide rod is fixedly installed at the top of the plugging ball. The guide rod passes through the support plate and is slidably connected with the support plate. A limit disk is fixedly installed at the top end of the guide rod. The limit disk is located above the support plate. A spring is fixedly installed between the limit disk and the support plate. The spring is wound around the guide rod. A plurality of water passing holes arranged in an annular shape at equal intervals are provided on the support plate. The plugging ball abuts against the bottom surface of the rubber sleeve.

[0007] Preferably, a smooth layer is provided on the surface of the plugging ball, and the size of the plugging ball is adapted to the size of the rubber sleeve.

[0008] Preferably, an upper chamber is provided on the upper half cylinder body of the limit sleeve, and a lower chamber is provided on the lower half cylinder body of the limit sleeve. The rubber sleeve is fixedly installed on the top wall of the lower chamber, and the rubber sleeve is of a hollow structure.

[0009] Preferably, a guide hole is provided at the central position of the support plate. The guide rod passes through the guide hole and is slidably connected with the guide hole.

[0010] Preferably, the number of the water passing holes is 4 - 8, and the size of the guide rod is adapted to the size of the guide hole.

[0011] Preferably, a plurality of threaded pipes arranged at equal intervals are fixedly installed on the delivery pipe. A threaded joint is fixedly installed at the top end of the water outlet pipe. The threaded joint is in threaded connection with the threaded pipe.

[0012] Preferably, a second convex block is further fixedly installed at the top end of the water outlet pipe. A sealing ring is sleeved on the threaded joint. The second convex block presses the sealing ring against the end face of the threaded pipe.

[0013] Preferably, a first convex block is fixedly installed on the threaded pipe. The cross sections of the first convex block and the second convex block are both hexagonal.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model is provided with a nozzle and a water outlet pipe, and a plugging ball is arranged in the water outlet pipe. As the water pressure in the water outlet pipe increases, the plugging ball can be pushed open, and at this time, the spraying operation can be carried out normally. In addition, when the pump body of the spraying device stops working, at this time, the water pressure in the water outlet pipe decreases, and the spring can drive the plugging ball to abut against the bottom surface of the rubber sleeve to realize the plugging operation, achieving the effect of blocking the continuous dripping of the liquid medicine and achieving the effect of protecting the nozzle from dripping.

[0016] 2. The utility model is provided with a threaded pipe and a threaded joint, which is convenient for connection operation. And through the arranged sealing ring, the sealing effect can be further improved, making it not easy to leak. In addition, through the arranged first convex block and second convex block, it is convenient to cooperate with an external wrench to tighten the threaded joint, which is convenient to use. Brief Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the utility model;

[0018] Figure 2 is the exploded structural schematic diagram of the utility model;

[0019] Figure 3 is the cross-sectional view of the water outlet pipe of the utility model;

[0020] Figure 4 is the structural schematic diagram of the support plate of the utility model;

[0021] Figure 5 is the cross-sectional view of the limiting sleeve of the utility model;

[0022] The meanings of each label in the figure are as follows:

[0023] 1. Delivery pipe; 10. Threaded pipe; 11. First convex block;

[0024] 2. Nozzle; 20. Water outlet pipe; 21. Second convex block; 22. Threaded joint; 23. Sealing ring; 24. Limiting sleeve; 241. Upper chamber; 242. Lower chamber; 25. Rubber sleeve; 26. Support plate; 261. Guide hole; 262. Water passing hole; 27. Guide rod; 271. Spring; 272. Limiting disc; 28. Plugging ball; 281. Smooth layer. Detailed Description of the Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1 - 5 , the present utility model provides a technical solution: a drip-proof device for the nozzle of an agricultural plant protection spraying device, including a delivery pipe 1, on which a plurality of nozzles 2 are arranged at equal intervals. The water inlet end of the nozzle 2 is fixedly installed with a water outlet pipe 20. On the inner wall of the water outlet pipe 20, a support plate 26 and a limit sleeve 24 are fixedly installed in sequence from top to bottom. A rubber sleeve 25 is fixedly installed on the bottom surface of the limit sleeve 24. Below the limit sleeve 24, there is a plugging ball 28. A guide rod 27 is fixedly installed at the top of the plugging ball 28. The guide rod 27 passes through the support plate 26 and is slidably connected with the support plate 26. A limit plate 272 is fixedly installed at the top end of the guide rod 27. The limit plate 272 is located above the support plate 26. A spring 271 is fixedly installed between the limit plate 272 and the support plate 26. The spring 271 is wound around the guide rod 27. A plurality of water passing holes 262 arranged in a ring at equal intervals are provided on the support plate 26. The plugging ball 28 abuts against the bottom surface of the rubber sleeve 25, realizing the plugging operation by using the plugging ball 28 to abut against the bottom surface of the rubber sleeve 25, and achieving the effect of drip-proof protection.

[0027] In this embodiment, a smooth layer 281 is provided on the surface of the plugging ball 28. The smooth layer 281 is made by mirror polishing. The size of the plugging ball 28 is adapted to the size of the rubber sleeve 25, so that the plugging ball 28 can better fit on the surface of the rubber sleeve 25 for sealing operation to avoid dripping.

[0028] Specifically, an upper chamber 241 is provided on the upper half cylinder of the limit sleeve 24 for the passage of water flow. A lower chamber 242 is provided on the lower half cylinder of the limit sleeve 24. The rubber sleeve 25 is fixedly installed on the top wall of the lower chamber 242. The rubber sleeve 25 is a hollow structure, so that the plugging ball 28 can abut against the bottom surface of the rubber sleeve 25 for normal sealing operation.

[0029] Furthermore, a guide hole 261 is provided at the central position of the support plate 26. The guide rod 27 passes through the guide hole 261 and is slidably connected with the guide hole 261. The number of the water passing holes 262 is 4 to 8. The size of the guide rod 27 is adapted to the size of the guide hole 261. The water passing holes 262 are used for normal water passing operation, and the guide rod 27 is used for guiding operation, so that the plugging ball 28 is more stable during the up and down movement.

[0030] In addition, a plurality of threaded pipes 10 arranged at equal intervals are fixedly installed on the delivery pipe 1. A threaded joint 22 is fixedly installed at the top end of the water outlet pipe 20. The threaded joint 22 is threadedly connected with the threaded pipe 10, which is convenient for connection operation.

[0031] It should be noted that a second convex block 21 is fixedly installed at the top end of the water outlet pipe 20. A sealing ring 23 is sleeved on the threaded joint 22. The second convex block 21 presses the sealing ring 23 against the end face of the threaded pipe 10. By providing the sealing ring 23, the effect of sealing protection can be achieved to avoid leakage.

[0032] It should be noted that a first convex block 11 is fixedly installed on the threaded pipe 10. The cross-sections of the first convex block 11 and the second convex block 21 are both hexagonal, making it more convenient to drive the threaded joint 22 to be tightened with the help of an external wrench.

[0033] When the anti-drip device of the nozzle of the agricultural plant protection spraying device of the present invention is in use, the water inlet end of the delivery pipe 1 is connected to an external delivery pump body. After the external pump body works, water is delivered. At this time, the water pressure in the delivery pipe 1 and the water outlet pipe 20 increases. After the water pressure increases, the water pressure can push the plugging ball 28 downward. At this time, there is a gap between the plugging ball 28 and the lower chamber 242. The water in the water outlet pipe 20 can flow out along the water passing hole 262 and the gap between the plugging ball 28 and the lower chamber 242 and then be sprayed out from the nozzle 2, completing the normal spraying operation;

[0034] When the external delivery pump body stops working, at this time, the external delivery pump body no longer delivers water, and the water pressure in the delivery pipe 1 and the water outlet pipe 20 decreases. At this time, the pulling force of the spring 271 is greater than the acting force of the water pressure pushing out the plugging ball 28. The spring 271 can drive the plugging ball 28 to move upward, and the plugging ball 28 will abut against the bottom surface of the rubber sleeve 25 to achieve the plugging operation and complete the anti-drip protection.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A nozzle anti-drip device for an agricultural plant protection sprayer, comprising a delivery pipe (1), characterized in that: The delivery pipe (1) is provided with a plurality of nozzles (2) arranged at equal intervals, a water outlet pipe (20) is fixedly mounted on the water inlet end of the nozzle (2), a support plate (26) and a limit sleeve (24) are fixedly mounted on the inner wall of the water outlet pipe (20) in order from top to bottom, a rubber sleeve (25) is fixedly mounted on the bottom surface of the limit sleeve (24), a blocking ball (28) is arranged below the limit sleeve (24), a guide rod (27) is fixedly mounted on the top of the blocking ball (28), and the guide rod (27) passes through the support plate (26). The guide rod (27) is slidably connected to the support plate (26); a limit plate (272) is fixedly installed on the top of the guide rod (27); the limit plate (272) is located above the support plate (26); a spring (271) is fixedly installed between the limit plate (272) and the support plate (26); the spring (271) surrounds the guide rod (27); a plurality of water holes (262) are arranged in an annular shape at equal intervals on the support plate (26); and the blocking ball (28) is against the bottom surface of the rubber sleeve (25).

2. The anti-drip device for the nozzle of the agricultural plant protection sprayer according to claim 1, characterized in that: A smooth layer (281) is provided on the surface of the blocking ball (28), and the size of the blocking ball (28) is matched with the size of the rubber sleeve (25).

3. The anti-drip device for the nozzle of the agricultural plant protection sprayer according to claim 1, characterized in that: An upper chamber (241) is arranged on the upper cylinder of the limiting sleeve (24), a lower chamber (242) is arranged on the lower cylinder of the limiting sleeve (24), the rubber sleeve (25) is fixedly mounted on the top wall of the lower chamber (242), and the rubber sleeve (25) is a hollow structure.

4. The anti-drip device for the spray head of the agricultural plant protection sprayer according to claim 1, characterized in that: A guide hole (261) is provided at the center of the support plate (26), and the guide rod (27) passes through the guide hole (261) and is slidably connected to the guide hole (261).

5. The anti-drip device for the spray head of the agricultural plant protection sprayer according to claim 4, characterized in that: The number of the water holes (262) is 4 to 8, and the size of the guide rod (27) is matched with the size of the guide holes (261).

6. The anti-drip device for the spray head of the agricultural plant protection sprayer according to claim 1, characterized in that: A plurality of threaded pipes (10) arranged at equal intervals are fixedly mounted on the delivery pipe (1), a threaded joint (22) is fixedly mounted on the top end of the water outlet pipe (20), and the threaded joint (22) is threadedly connected to the threaded pipe (10).

7. The anti-drip device for the spray head of the agricultural plant protection sprayer according to claim 6, characterized in that: A second protrusion (21) is fixedly mounted on the top end of the water outlet pipe (20), a sealing ring (23) is sleeved on the threaded joint (22), and the second protrusion (21) presses the sealing ring (23) against the end surface of the threaded pipe (10).

8. The anti-drip device for the spray head of the agricultural plant protection sprayer according to claim 7, characterized in that: A first convex block (11) is fixedly mounted on the threaded tube (10), and the cross-sections of the first convex block (11) and the second convex block (21) are both hexagonal.

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