A crown nozzle for an electric pollinator adapted for downward-flowering crops

Abstract

This utility model discloses a crown-shaped nozzle for an electric pollinator adapted to downward-flowering crops, solving the problems of poor adaptability, incomplete coverage, and uneven pollination of existing equipment for downward-flowering crops such as kiwifruit and monk fruit. The nozzle includes a straight pipe section (1), an elbow (2), and a crown-shaped fan nozzle (3) connected in sequence, forming an integrated plastic structure. The straight pipe section (1) is fitted with the spray pipe of the handheld electric pollinator, and the elbow (2) has an axial angle of 135°, working in conjunction with the 45° angled handheld pollinator to make the powder mist fan surface perpendicular to the trellis surface. The crown-shaped fan nozzle (3) is shaped like a rooster's comb, with a longitudinally tapered powder spraying nozzle (4) that is narrow at the bottom and wide at the top. The gap between the powder spraying nozzle (4) is controlled by adjusting the two protrusions (31, 32) with screws (5). The airflow and pollen are sprayed longitudinally in a thin fan shape from the powder spraying nozzle (4) after passing through the straight pipe section (1). The fan surface is parallel to the line of sight, significantly improving pollination efficiency, coverage, and uniformity.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a crown nozzle for an electric pollinator adapted to downward-flowering crops. It is particularly suitable for pollination of trellis-grown crops such as kiwifruit, monk fruit, and passion fruit, which have downward-facing flowers. It can achieve faster pollination efficiency, expand the pollination coverage, optimize the spray uniformity of the pollinator, and improve pollen utilization. Background Technology

[0002] In agricultural production, crops such as kiwifruit, monk fruit, and passion fruit are mostly cultivated using trellises. Their flowers open downwards, have a short flowering period, and are densely distributed, making pollination quality a direct determinant of yield and quality. Traditional natural pollination results in low fruit set and uneven quality, failing to meet commercial demands. Manual pollination requires individual flower-by-flower operation, which is extremely inefficient and makes it difficult to complete large-scale pollination within a short flowering period, easily leading to yield reductions due to untimely pollination. Therefore, large-scale electric pollinators have become core equipment for large-scale cultivation, and the nozzle, as a core actuator, directly affects pollination efficiency, uniformity of spraying, and pollen utilization.

[0003] Most existing large-scale electric pollinators are blower-type electric pollinators, whose nozzles are often directly derived from vacuum cleaner nozzles, without any specific design for downward-flowering crops. The dimensions of these vacuum nozzles are unreasonable, with a height of 15-20mm and a width of 80-100mm, and the gap is too large and non-adjustable. Furthermore, due to limitations in mold release, strength, and manufacturing processes, the nozzles use a double-ended mold structure, resulting in a parallel, fixed gap without gradual transitions. Pollen, after being sprayed from the nozzle, concentrates in the center due to inertia, leaving sparse pollen on the sides, leading to significant uneven pollination. In addition, the powder mist sprayed by these nozzles is angled upwards, perpendicular to the line of sight, and narrowly distributed in front of and behind the operator. The operator must repeatedly swing the pollinator left and right and move it slowly to ensure sufficient pollination, resulting in low pollination efficiency. This is unsuitable for short-flowering periods, and the thin powder mist perpendicular to the line of sight is difficult to observe with the naked eye, easily leading to pollen waste or missed pollination.

[0004] In summary, existing pollination methods and blower-type electric pollinator nozzles mostly use vacuum cleaner suction ports, which are not specially designed and are difficult to adapt to the needs of trellis cultivation of downward-flowering crops. They have problems such as unreasonable size, non-adjustable gaps, low efficiency, and poor uniformity, which restrict the efficiency and benefits of large-scale planting. There is an urgent need for a special nozzle with a reasonable structure, high efficiency, uniformity, and visibility to make up for the shortcomings of existing technologies. Summary of the Invention

[0005] This utility model aims to solve the technical problems of existing blower-type electric pollinator nozzles, which use vacuum cleaner suction ports and are not specifically designed for downward-flowering crops, resulting in unreasonable size, non-adjustable gaps, low pollination efficiency, easy omissions due to rapid lifting, poor powder uniformity, and insufficient powder mist visualization. It provides a crown-shaped nozzle for electric pollinators that is adapted to downward-flowering crops, meeting the needs of large-area uniform pollination of crops with short flowering periods in trellis cultivation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A crown-shaped nozzle for an electric pollinator adapted to downward-flowering crops includes a straight pipe section, an elbow, and a crown-shaped fan-shaped nozzle connected in sequence, all three being an integral plastic structure. The straight pipe section is used to fit the spray pipe of the handheld electric pollinator and is fixed by a tight fit; the handheld electric pollinator is held at a 45° angle upwards, the elbow axis angle is 135°, and the straight pipe section and the crown-shaped fan-shaped nozzle symmetrical axis angle is 135°. The two work together to make the spray fan surface perpendicular to the crop trellis surface, and the fan surface is in the operator's front-back direction, swinging left and right while walking to pollinate, resulting in a certain pollination overlap area. The crown-shaped fan nozzle is designed in the shape of a rooster's comb and is arranged from front to back of the operator. Its front end features a longitudinally tapered powder spray nozzle, narrower at the bottom and wider at the top. The narrow section is 0.8–3 mm wide, and the wide section is 6–12 mm wide. The arc length of the tapered section is 120–180 mm, and the fan-shaped angle is 60–120°. The edge of the fan-shaped nozzle is rounded. The crown-shaped fan nozzle has two recessed bosses symmetrically distributed along the axis of symmetry of the fan shape, close to the powder spray nozzle. These bosses are driven through by screws, allowing for gap adjustment. These screws can be machine screws or self-tapping screws, with slotted or Phillips head screws and pan or countersunk heads. The recessed bosses can be internally threaded to fit the screws. The fan-shaped nozzle is parallel to the user's line of sight, creating a layered powder mist effect along the fan-shaped direction, facilitating observation and adjustment of the powder amount. The molding process for the one-piece plastic structure can be blow molding, rotational molding or injection molding. When injection molding, a symmetrical two-half structure is adopted, and the connection method can be screw splicing, adhesive bonding or ultrasonic welding.

[0007] The beneficial effects of this invention are: significantly improved pollination efficiency. Traditional nozzles have a fan surface perpendicular to the line of sight, are extremely thin in the front-to-back direction and have no overlap, making them invisible to the naked eye. When moving quickly, pollination may be missed, requiring slow walking and repeated left-to-right swinging of the pollinator. However, the nozzle of this invention, through the coordinated design of a 135° bend and a 45° grip, makes the spray fan surface perpendicular to the trellis surface and has a pollination overlap area in the direction of travel. Combined with a wide, gradually changing spray nozzle and a fan surface angle of 60~120°, the operator only needs to move quickly forward and slowly swing the electric pollinator to complete full pollination coverage. This not only completely avoids pollination omissions but also significantly increases the pollination area per unit time, perfectly adapting to the needs of large-area operations during short flowering periods and greatly reducing labor intensity.

[0008] The uniformity of powder spraying is significantly improved: the powder spraying nozzle adopts a gradient gap design that is narrow at the bottom and wide at the top, which can force the airflow to carry the pollen to both sides to form a fan-shaped powder mist, completely solving the problem of pollen distribution that is "concentrated in the middle and sparse on both sides" in traditional nozzles. This ensures that the flowers growing downward on the trellis are evenly pollinated, improving the fruit setting rate and the consistency of fruit quality.

[0009] It achieves flexible gap adaptation: through the cooperation structure of boss and screw, the gap of the spray nozzle can be precisely adjusted according to the pollen variety, pollen particle size, pollen viscosity and crop variety differences. This avoids pollen clogging caused by too small a gap, and also prevents pollen concentration and uneven spraying waste caused by too large a gap, adapting to the diverse needs of different pollination scenarios.

[0010] Enhanced visualization and ease of operation: The spray fan is parallel to the user's line of sight, and the powder mist overlaps along the fan direction, so even if the powder mist is thin, the pollen spray range can be clearly observed, making it easy to adjust the amount of powder sprayed and the speed of travel in real time, effectively avoiding pollination omissions or over-spraying; at the same time, it provides multiple molding processes such as blow molding, rotational molding and injection molding. Injection molded products can be fixed by screw splicing, gluing or ultrasonic welding to meet different production needs. The structure is reasonable, the assembly is convenient, and the service life is long. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the present invention, which intuitively shows the overall shape and spatial distribution of the components.

[0012] Figure 2 This is a partial cross-sectional view of the present invention, clearly showing the assembly details of the powder spray nozzle, boss and screw.

[0013] Figure 3 This is a front view of the present invention, showing the gradient gap design of the powder spray nozzle, which is narrower at the bottom and wider at the top.

[0014] The markings in the diagram are: 1-straight pipe section, 2-elbow, 3-crown fan-shaped nozzle, 31-boss, 32-boss, 4-powder nozzle, 41-wide section, 42-narrow section, 5-screw. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. This embodiment is only used to explain this utility model and is not intended to limit the scope of protection of this utility model.

[0016] like Figures 1 to 3As shown, the crown-shaped nozzle of the electric pollinator adapted to downward-flowering crops described in this utility model is made of PP plastic. The molding process can be blow molding, rotational molding, or injection molding, with blow molding being the preferred process because it is simple, efficient, and economical. Rotational molding can also be used, but it is more expensive. Injection molding requires the creation of two symmetrical half-shells through mold splitting, followed by fixing by screw splicing, gluing, or ultrasonic welding, which results in higher mold costs, greater process complexity, and poorer economic efficiency than blow molding. This embodiment takes the preferred blow molding process as an example. After the straight pipe section 1, elbow 2, and crown-shaped fan nozzle 3 are integrally formed by blow molding, the two closed ends are removed. The structure has strong integrity, no gaps, and good sealing, balancing production efficiency and structural strength.

[0017] The straight pipe section 1 is a cylindrical structure with an inner diameter of approximately 40mm and a length of approximately 30mm. It is tightly fitted to the spray pipe of the handheld electric pollinator, ensuring a secure and airtight connection while effectively sealing against air leakage. The included angle of the axis of the elbow 2 is 135°. The straight pipe section 1 is connected to the crown-shaped fan-shaped nozzle 3 via the elbow 2, and the included angle between the axis of the straight pipe section 1 and the axis of symmetry of the crown-shaped fan-shaped nozzle 3 is 135°. During pollination, the operator holds the pollinator at a 45° angle upwards, keeping the spray nozzle 4 of the crown-shaped fan-shaped nozzle 3 20-35cm away from the crop trellis surface. Utilizing the amplification effect of the fan-shaped cone angle, the spray fan is perpendicular to the trellis surface, and a certain amount of overlapping pollination area can be formed in the front-to-back direction, ensuring reliable and complete pollination.

[0018] The crown-shaped fan-shaped nozzle 3 is shaped like a rooster's comb and is arranged along the operator's front-to-back direction. The transition from the straight pipe section 1 to the fan-shaped section is a gradual transition from a circle to a fan shape. Its front end has a longitudinal duckbill-shaped gradient powder spraying nozzle 4, which is narrow at the bottom and wide at the top. The width of the narrow part 42 is 0.8~3mm, preferably 1mm, and the width of the wide part 41 is 6~12mm, preferably 9.5mm. The arc length of the gradient section is 120~180mm, preferably 140mm, and the included angle of the fan surface is 60~120°, preferably 80°. The above-mentioned preferred dimensions are matched to optimize the smooth flow of fluid inside the nozzle, which not only reduces resistance loss, but also allows for a stable and continuous spraying of a complete fan-shaped mist surface that is full and uniform. The fan-shaped edge of the powder spraying nozzle 4 is set in an arc shape. Combined with the amplification effect of the cone angle, it can ensure uniform and reliable powder spraying at a position of 20-35cm below the canopy surface.

[0019] The area near the powder spraying nozzle 4 of the crown-shaped fan nozzle 3 has two concave bosses 31 and 32 along the axis of symmetry. The bosses have a diameter of 6mm and a concave depth of 3mm. Self-tapping screws 5 pass through the bosses 31 and 32. Tightening the self-tapping screws 5 can adjust the gap size of the powder spraying nozzle 4. Alternatively, internal threads can be provided inside the bosses 31 and 32, and machine screws 5 can be used to connect them. The screw head adopts a countersunk head design, which is flush with the outer surface of the fan shape to avoid scratching the hand during operation.

[0020] The working process of this embodiment is as follows: The straight pipe section 1 is tightly fitted with the spray pipe of the handheld electric pollinator to ensure that there is no looseness or air leakage; for crops such as kiwifruit, according to their pollen characteristics, the self-tapping screw 5 is turned to adjust the spray nozzle 4 to a gradual gap of 1mm in the narrow part and 9.5mm in the wide part to accurately adapt to the pollination requirements.

[0021] The operator holds the pollinator at a 45° angle upwards, keeping the nozzle 20-35cm away from the canopy surface. After starting the equipment, the pollen enters from the straight pipe section 1 with the airflow, is guided by the elbow 2, and smoothly transitions from a circular to a fan-shaped structure before being sprayed out from the gradual spray nozzle 4 of the crown-shaped fan-shaped nozzle 3. Due to the gradual design of the spray nozzle 4, which is narrow at the bottom and wide at the top, the airflow forces the pollen to the sides, avoiding concentration in the middle. At the same time, it naturally expands along the 80° fan-shaped cone angle, further increasing the coverage area and improving efficiency.

[0022] Operators do not need to walk slowly or repeatedly swing the pollinator. They only need to walk at a speed of 0.5-1m / s while slowly swinging back and forth to achieve complete coverage of a 100-200mm wide area in front of and behind the spray fan. At the same time, the sprayed powder mist is parallel to the operator's line of sight. The powder mist forms an overlapping effect along the direction of the fan and coincides with the line of sight. Even if the powder mist is thin, the spray range and concentration can be clearly observed. The operator can fine-tune the moving speed and powder concentration in real time to ensure the quality of pollination.

[0023] This embodiment fully realizes the technical solution of this utility model through specific structural dimensions, material selection and operation process, and solves the problems of low efficiency, poor uniformity and insufficient visualization of traditional nozzles. It is suitable for the short flowering period and large-area pollination needs of downward-flowering crops such as kiwifruit and monk fruit in trellis cultivation. It has a simple structure, strong practicality, and multiple molding processes can be flexibly selected, making it easy to scale up production.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any technical solution that is the same as or equivalent to the core technical features recorded in the claims of the present utility model within the spirit and principles of the present utility model shall fall within the scope of protection of the present utility model.

Claims

1. A crown nozzle for an electric pollination machine adapted for a downward-facing flowering crop, characterized in that, The device includes a straight pipe section (1), an elbow (2), and a crown-shaped fan nozzle (3) that are fixedly connected in sequence. The three are integrated plastic structures. The straight pipe section (1) is used to connect to the spray nozzle of a handheld electric pollinator. The handheld electric pollinator is held at a 45° angle upward. The included angle of the axis of the elbow (2) is 135°. The included angle of the axis of symmetry between the straight pipe section (1) and the crown-shaped fan nozzle (3) is 135°. The two work together to make the spray fan surface perpendicular to the crop trellis surface. The crown-shaped fan nozzle (3) is shaped like a rooster's comb and is arranged along the front and back direction of the operator. Its front end has a narrow opening at the bottom. The powder spray nozzle (4) is wide at the top and has a longitudinal duckbill-shaped gradient. The lower part of the powder spray nozzle (4) is narrow (42) and the upper part is wide (41). The crown-shaped fan nozzle (3) is provided with two concave protrusions (31, 32), which are symmetrically distributed on the fan-shaped axis of symmetry and close to the powder spray nozzle (4). They are connected by screws (5) to adjust the gap. The airflow and pollen enter through the straight pipe section (1), pass through the elbow (2) and the crown-shaped fan nozzle (3) in sequence, and are sprayed from the powder spray nozzle (4) in a longitudinal thin fan shape. The fan surface is parallel to the user's line of sight.

2. The crown nozzle of an electric pollination machine adapted for a downward-facing flowering crop according to claim 1, characterized in that, The molding process of the integrated plastic structure can be blow molding, rotational molding or injection molding; when injection molding, a symmetrical two-half structure is adopted, and the connection method can be screw splicing, adhesive bonding or ultrasonic welding; the straight pipe section (1) is fixed to the spray pipe of the handheld electric powder applicator by a tight fit.

3. The crown nozzle of the electric pollination machine adapted for downward-facing flowering crops according to claim 1, characterized in that, The narrow part (42) of the powder spray nozzle (4) has a width of 0.8~3mm; the wide part (41) has a width of 6~12mm; the arc length of the gradient section is 120~180mm, and the included angle of the fan-shaped surface is 60~120°; the edge of the fan-shaped surface of the powder spray nozzle (4) is set in an arc shape.

4. The crown nozzle of the electric pollination machine adapted for downward-facing flowering crops according to claim 1, characterized in that, The screw (5) can be a machine screw or a self-tapping screw; the screw type is slotted or cross-head, the head is pan head or countersunk head, and the head is flush with the outer edge surface of the concave boss (31, 32); the boss (31, 32) can be provided with internal threads to adapt to the screw (5) to realize gap adjustment.

5. The crown nozzle of an electric pollination machine adapted for a downward-facing flowering crop according to claim 1, characterized in that, The downward-flowering crops include kiwifruit and monk fruit.

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