Handheld pollination gun for litchi trees

Abstract

The invention relates to the field of pollination guns, in particular to a handheld pollination gun for litchi trees, which comprises a pollination gun, a telescopic powder spraying pipe, a nozzle, an extrusion ring, an adjusting switch and the like, a pollen inlet pipe is arranged in the pollination gun; a telescopic powder spraying pipe is mounted on the pollination gun and is communicated with the powder inlet pipe; a nozzle is fixedly connected to a left-end pipe orifice of the telescopic powder spraying pipe; the left opening of the nozzle is a pollination opening; the nozzle is composed of a fixed part, four rotating rods and four first connecting parts, the fixed part is fixedly connected with the telescopic powder spraying pipe, and the first connecting parts are made of elastic deformation materials; and an adjusting switch is arranged on the pollination gun. According to the invention, the frequent expansion and contraction of the nozzle pollination opening in the pollination process of a manual hand-held pollination gun are realized, so that the falling of adhered pollen is facilitated, the blockage possibility of the nozzle pollination opening is reduced, and the normal pollination is ensured.

Description

Technical Field

[0001] The invention relates to the field of pollination guns, in particular to a handheld pollination gun for litchi trees. Background Art

[0002] The existing pollination gun is designed to meet the pollination needs of flowers of different sizes, and a structure for adjusting the size of the discharge port is usually provided inside the pollination gun. Generally, an adjusting ring inside the pollination gun is rotated, and a plurality of pollination ports with different apertures are provided on the adjusting ring. The aperture size of the pollination port is changed by rotating the adjusting ring, or the telescopic tube is slid. When the telescopic tube is pulled out of or pushed into the discharge tube, the space at the discharge port will increase or decrease accordingly, thereby controlling the outflow of pollen. However, since the pollen of litchi trees is more viscous, and the discharge port structure of the existing pollination gun remains in a static state when the size of the discharge port is adjusted, when the pollen passes through the discharge port, the pollen will gradually adhere to and accumulate at the discharge port, causing powder jamming, affecting the normal spraying of pollen, and resulting in uncontrollable pollination amount. Summary of the invention

[0003] In order to overcome the disadvantage that the discharge port structure of the existing pollination gun remains in a static state when the size of the discharge port is adjusted, so when a large amount of pollen passes through the discharge port, the pollen will gradually adhere to and accumulate at the discharge port, thereby affecting the normal spraying of the pollen and causing uncontrollable pollination amount, the present invention provides a handheld pollination gun for litchi trees.

[0004] The technical scheme is as follows: A handheld pollination gun for litchi trees, comprising a pollination gun and a telescopic powder spraying tube; a powder inlet tube is arranged inside the pollination gun; a telescopic powder spraying tube is installed on the pollination gun, and the telescopic powder spraying tube is connected to the powder inlet tube; it also comprises a nozzle, an extrusion ring, an adjustment switch, a driving assembly and a windproof assembly; a nozzle is fixedly connected to the left end of the telescopic powder spraying tube; the left opening of the nozzle is a pollination port; the nozzle is composed of a fixed part, four rotating rods and four first connecting parts, the fixed part is fixedly connected to the telescopic powder spraying tube, and the first connecting part is made of elastic deformation material; a driving assembly is installed on the fixed part; an extrusion ring is connected to the driving assembly, and the driving assembly is used to drive the extrusion ring to adjust the nozzle size; a bellows is arranged between the left side of the telescopic powder spraying tube and the extrusion ring, and the bellows is connected to the telescopic powder spraying tube; an adjustment switch is installed on the pollination gun, and the adjustment switch is connected to the driving assembly through an electrical signal; a windproof assembly for preventing pollen from being blown away is installed on the fixed part.

[0005] Preferably, the windproof component includes a mounting ring and a windproof cover; the mounting ring is mounted on the fixing portion of the nozzle; and the mounting ring is connected to the windproof cover for preventing pollen from being blown away.

[0006] Preferably, an extrusion block is also included; a plurality of extrusion blocks are fixedly connected to the nozzle, and each extrusion block is fixedly connected to the adjacent rotating rod on the nozzle; the wind shield is composed of six support rods and six shielding cloths, the shielding cloths are elastic, the extrusion blocks are in contact with the support rods of the wind shield, and the support rods of the wind shield are rotatably connected to the fixed part.

[0007] Preferably, the distance from the left side of the wind shield to the nozzle is the optimal distance for pollination.

[0008] Preferably, a connecting ball is further included; the pollination gun is connected to a connecting ball for damping rotation, and the connecting ball is arranged as a centrally-through structure; a second connecting part is arranged on the connecting ball, the telescopic powder spraying tube is fixedly connected to the second connecting part, and the second connecting part is arranged as a centrally-through structure; the telescopic powder spraying tube is connected to the powder inlet pipe via the connecting ball and the second connecting part.

[0009] Preferably, it also includes a limiting block; the limiting block is slidably connected to the pollination gun, and the pollination gun is screwed with a pressing portion through the mounting block.

[0010] Preferably, a rubber layer is provided at the contact portion between the limiting block and the connecting ball.

[0011] Preferably, a water inlet pipe is also included; the second connecting part is connected to a water inlet pipe for easy cleaning; and a solenoid valve is provided at the pollination gun's pollination pipe.

[0012] Preferably, the mounting ring is detachably connected to the fixing portion of the nozzle; a limiting rod is inserted into the mounting ring, and the limiting rod is screwed to the fixing portion.

[0013] The beneficial effects of the present invention are as follows: the present invention realizes the frequent expansion and contraction of the pollination opening of the nozzle during the pollination by hand-held pollination gun, which is conducive to the falling off of the adhering pollen, reduces the possibility of clogging of the pollination opening of the nozzle, and ensures the normal pollination; The wind shield is used to shield the nozzles around to block the wind and reduce the impact of wind on pollen. At the same time, the wind shield is used to block most of the branches and leaves of the litchi tree, thereby preventing the branches and leaves with dew from contacting the pollination opening of the nozzle to the greatest extent, and preventing the pollination opening of the nozzle from being wet, which increases the firmness of pollen adhering to the pollination opening of the nozzle and affects the subsequent pollination effect. The adjacent support rods of the wind shield are squeezed by the squeezing block, so that when the pollination port of the nozzle expands and contracts, the wind shield will also expand and contract accordingly. Compared with the wind shield pollinating in a fixed posture, the wind shield is adjusted accordingly according to the size of the bouquet, which can effectively avoid excessive pollination on the same bouquet. At the same time, the pollen can be concentrated in the area where the wind shield gathers, ensuring the stability of the pollination effect and improving the pollination efficiency. The inner wall of the wind shield is scraped by the squeezing block to clean the pollen adhering to the inner wall of the wind shield, thereby preventing the residual pollen from affecting the pollination success rate of the bouquet to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the handheld pollination gun for litchi trees of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the nozzle and the extrusion block combination of the present invention; Figure 3 A sectional view of the assembly of the mounting ring and the wind shield of the present invention; Figure 4 It is a schematic diagram of the combined three-dimensional structure of the extrusion ring and the driving assembly of the present invention; Figure 5 It is a schematic diagram of the combined three-dimensional structure of the connecting ball, the limiting block and the water inlet pipe of the present invention; Figure 6 It is a cross-sectional view of the pollination gun of the present invention; Figure 7 It is a schematic diagram of the combined three-dimensional structure of the mounting ring and the wind shield of the present invention.

[0015] Explanation of the accompanying drawings: 1-pollination gun, 1001-powder inlet pipe, 2-telescopic powder spraying pipe, 2001-bellows, 3-nozzle, 3001-fixed part, 3002-rotating rod, 3003-first connecting part, 4-extrusion ring, 5-adjusting switch, 101-driving member, 102-first connecting rod, 103-second connecting rod, 201-mounting ring, 20101-limiting rod, 202-wind shield, 203-extrusion block, 301-connecting ball, 30101-second connecting part, 302-limiting block, 30201-pressing part, 303-water inlet pipe. DETAILED DESCRIPTION

[0016] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

[0017] Example 1: Figure 1-Figure 4 and Figure 7 As shown, a handheld pollination gun for litchi trees includes a pollination gun 1 and a telescopic powder spraying tube 2; a pollination gun 1 is provided with a powder inlet tube 1001; a telescopic powder spraying tube 2 is installed on the pollination gun 1, and the telescopic powder spraying tube 2 is connected to the powder inlet tube 1001; It also includes a nozzle 3, an extrusion ring 4, an adjustment switch 5, a drive assembly and a windproof assembly; the nozzle 3 is fixedly connected to the left end of the telescopic powder spraying tube 2; the left opening of the nozzle 3 is a pollination opening; the nozzle 3 is composed of a fixed part 3001, four rotating rods 3002 and four first connecting parts 3003, the fixed part 3001 is fixedly connected to the telescopic powder spraying tube 2, and the first connecting part 3003 is made of elastic deformation material, such as silicone and rubber; a drive assembly is installed on the fixed part 3001; an extrusion ring 4 is connected to the drive assembly; a bellows 2001 is arranged between the left side of the telescopic powder spraying tube 2 and the extrusion ring 4, and the bellows 2001 is connected to the telescopic powder spraying tube 2; an adjustment switch 5 is installed on the pollination gun 1, and the adjustment switch 5 is connected to the drive assembly through an electrical signal, and the operation of the drive assembly is controlled by moving the adjustment switch 5; a windproof assembly is installed on the fixed part 3001.

[0018] The driving assembly includes a driving member 101, a first connecting rod 102 and a second connecting rod 103; two driving members 101 symmetrically connected to the fixed part 3001 of the nozzle 3 are fixedly connected, and the driving member 101 is an electric push rod; the telescopic end of each driving member 101 is fixedly connected to the first connecting rod 102, and each first connecting rod 102 passes through the fixed part 3001; the left side of each first connecting rod 102 is fixedly connected to the second connecting rod 103, and the left side of each second connecting rod 103 is fixedly connected to the extrusion ring 4, and the first connecting rod 102, the second connecting rod 103 and the extrusion ring 4 are driven by the driving member 101 to move left and right, thereby squeezing the nozzle 3 to change the size of the nozzle 3.

[0019] The windproof component includes a mounting ring 201 and a windproof cover 202 ; the mounting ring 201 is mounted on the fixing portion 3001 of the nozzle 3 ; and the windproof cover 202 is connected to the mounting ring 201 .

[0020] It also includes an extrusion block 203; four extrusion blocks 203 are fixedly connected to the nozzle 3, and each extrusion block 203 is fixedly connected to the adjacent rotating rod 3002 on the nozzle 3; the wind shield 202 is composed of six support rods and six shielding cloths, the shielding cloths are elastic, the extrusion blocks 203 are in contact with the support rods of the wind shield 202, and the support rods of the wind shield 202 are rotatably connected to the fixed part 3001.

[0021] The distance from the left side of the wind shield 202 to the nozzle 3 is the optimal distance for pollination.

[0022] The working process of this embodiment is: The pollination gun 1 is composed of a pollen storage container, a power device (impeller and motor), a control device (control buttons and electronic components), a telescopic powder spraying tube 2 and a nozzle 3. The flowers of the litchi tree are small and exquisite, and a number of small flowers are gathered into bouquets of different sizes. Before pollinating the bouquets on the litchi tree with the pollination gun 1, according to the distance of the bouquet from the nozzle 3, if the distance is too far, the end of the telescopic powder spraying tube 2 is manually pulled out to extend the length of the telescopic powder spraying tube 2. If the distance is too close, the end of the telescopic powder spraying tube 2 is manually pressed to compress and shorten the length of the telescopic powder spraying tube 2, thereby adjusting the distance between the tube mouth of the telescopic powder spraying tube 2 and the bouquet, so as to manually spray pollen on the target bouquet, and then press the control button of the pollination gun 1 to start the impeller in the pollination gun 1. The wind force generated by the high-speed rotation of the impeller blows the pollen in the pollen storage container into the telescopic powder spraying tube 2, and finally sprays the bouquet through the nozzle 3 at the end of the telescopic powder spraying tube 2, thereby achieving flower pollination.

[0023] The existing pollination gun 1 is designed to meet the pollination needs of flowers of different sizes, and a structure for adjusting the size of the discharge port is usually provided inside the pollination gun 1. Generally, an adjustment ring inside the pollination gun 1 is rotated, and a plurality of pollination ports with different apertures are provided on the adjustment ring. The aperture size of the pollination port is changed by rotating the adjustment ring, or the telescopic tube is slid. When the telescopic tube is pulled out or pushed into the discharge tube, the space at the discharge port will increase or decrease accordingly, thereby controlling the outflow of pollen. However, since the pollen of litchi trees is more viscous, and the discharge port structure of the existing pollination gun 1 remains in a static state when adjusting the size of the discharge port, when the pollen passes through the discharge port, the flower The pollen will gradually adhere to and accumulate at the discharge port, causing powder jamming, affecting the normal spraying of pollen and resulting in uncontrollable pollination amount. To solve the above situation, when manually holding the pollination gun 1 to pollinate different bouquets, it is necessary to adjust the size of the nozzle 3 according to the size of the bouquet. It should be noted that in the initial state, the pollination port of the nozzle 3 is in the smallest state. At this time, the adjustment switch 5 is manually pushed downward to slide downward on the pollination gun 1, thereby controlling the driving member 101 to drive the first connecting rod 102, the second connecting rod 103 and the extrusion ring 4 to move to the left, so that the extrusion ring 4 gradually moves to the rotating rod 300 on the nozzle 3. 2 is squeezed, and at the same time, the bellows 2001 is stretched. With the squeezing of the squeezing ring 4, the rotating rod 3002 on the nozzle 3 will gradually move outward, and at the same time, the first connecting part 3003 between the rotating rods 3002 will be pulled and gradually expand outward, so that the left pollination opening of the nozzle 3 gradually expands, and then the control button of the pollination gun 1 is manually pressed to spray the pollen into the bellows 2001 through the orifice of the telescopic powder spraying tube 2, and then spray it to the pollination opening of the nozzle 3 through the orifice of the bellows 2001, and finally spray it to the bouquet through the pollination opening of the nozzle 3. By analogy, the manual can push the adjustment button downward according to the size of the bouquet. The distance between the switch 5 and the nozzle 3 is controlled to control the squeezing degree of the squeezing ring 4 on the rotating rod 3002 on the nozzle 3, thereby realizing the adjustment of the size of the nozzle 3, so as to meet the pollination requirements of different bouquet sizes. Further, in the above-mentioned pollination process, the size of the pollination opening of the nozzle 3 will change frequently due to the different sizes of the bouquets. Compared with the existing method of changing the size of the pollination opening of the nozzle 3, the present invention is conducive to the shedding of adhered pollen during the frequent expansion and contraction of the pollination opening of the nozzle 3, that is, during the expansion and contraction of the first connecting part 3003, thereby reducing the possibility of clogging of the pollination opening of the nozzle 3 and ensuring the normal pollination.

[0024] During the pollination process, the external wind will blow the pollen sprayed from the nozzle 3, causing the sprayed pollen to deviate, resulting in part of the pollen failing to accurately land on the target flower, reducing the amount of pollen that actually reaches the flower and lowering the success rate of pollination. When the wind is strong, the pollen may be blown away from the bouquet area, seriously affecting the pollination effect. Therefore, in order to improve the above situation, when the pollination gun 1 is manually held for pollination, the nozzle 3 is shielded and protected by the wind shield 202 to block the wind and reduce the impact of the wind on the pollen. At the same time, since the temperature is relatively low and the humidity is high in the morning, the pollen is in a relatively fresh state. , the activity is relatively high, so artificial pollination is usually carried out in the morning, but the branches and leaves of the litchi tree are usually covered with dew, and the wind shield 202 will block most of the branches and leaves of the litchi tree, thereby preventing the branches and leaves covered with dew from contacting the pollination port of the nozzle 3 to the greatest extent, avoiding the pollination port of the nozzle 3 from being wet, resulting in the pollen adhering to the pollination port of the nozzle 3 with increased firmness, affecting the subsequent pollination effect. It should be noted that during the pollination process, some pollen will adhere to the wind shield 202, but because the diameter of the wind shield 202 is much larger than the diameter of the nozzle 3, it will not affect the pollination.

[0025] It should be noted that, during pollination, if the pollination port of the nozzle 3 is too close to the bouquet, the pollen will be too concentratedly sprayed on a local area of ​​the bouquet, resulting in uneven distribution of pollen on the flower surface. If the pollination port of the nozzle 3 is too far from the bouquet, the pollen will be excessively dispersed during the propagation process due to factors such as air resistance, resulting in a decrease in the amount of pollen on the stigma. Therefore, the distance from the pollination port of the nozzle 3 to the bouquet is crucial. Since the lychee tree is relatively tall, for bouquets at a higher position, due to the existence of visual difference, it is difficult to manually control the distance from the nozzle 3 to the bouquet, thereby affecting the pollination effect of the bouquet. To solve the above situation, by making the distance from the left side of the wind shield 202 to the nozzle 3 the optimal distance suitable for pollination, during manual pollination, it is only necessary to put the left side of the wind shield 202 close to the bouquet to prompt it that the distance is suitable for pollination, thereby preventing improper distance control during artificial pollination and affecting the pollination effect.

[0026] To further ensure the pollination effect, when the extrusion ring 4 squeezes the rotating rod 3002 of the nozzle 3, the rotating rod 3002 of the nozzle 3 will drive the extrusion block 203 to squeeze the adjacent supporting rod of the wind shield 202, so that the adjacent supporting rod drives the shielding cloth of the wind shield 202 to rotate outward together, so that the left side of the wind shield 202 expands outward in a trumpet shape, and then when the pollination port of the nozzle 3 expands and contracts, the wind shield 202 will also expand and contract accordingly. Compared with the wind shield 202 pollinating in a fixed posture, the wind shield 202 is adjusted accordingly according to the size of the bouquet, which can effectively avoid excessive pollination on the same bouquet. At the same time, the pollen can be concentrated in the area where the wind shield 202 gathers, thereby ensuring the stability of the pollination effect and improving the pollination efficiency.

[0027] In the above process, although the pollination opening of the nozzle 3 frequently expands and contracts, in the case of a long period of pollination in the morning, the mist in the air still gradually adheres to the nozzle 3, so that the pollination opening of the nozzle 3 gradually becomes moist, and the pollen adheres to the pollination opening of the nozzle 3 more firmly and is difficult to fall off. To solve the above situation, when the person notices that the amount of pollen sprayed from the nozzle 3 is abnormal, the person manually pushes the adjustment switch 5 to the bottom, and controls the driving member 101 to drive the first connecting rod 102, the second connecting rod 103 and the extrusion ring 4 to move to the left, until the left side of the extrusion ring 4 The surface passes over the left side of the first connecting portion 3003 of the nozzle 3. In the above process, the squeezing ring 4 will gradually squeeze the pollen adhered to the pollination port of the nozzle 3 until the squeezing ring 4 squeezes the adhered pollen to the outside of the nozzle 3, thereby realizing the dredging and cleaning of the pollination port of the nozzle 3. There is no need to manually disassemble and clean the telescopic powder spray tube 2, which reduces the manual workload, improves the pollination efficiency, and improves the ease of use of the pollination gun 1. It should be noted that the right side of the squeezing ring 4 is always located inside the nozzle 3, and will not completely pass over the left side of the nozzle 3. Therefore, the squeezing ring 4 can still be reset to its initial position.

[0028] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 2 and Figure 5-Figure 7 As shown, it also includes a connecting ball 301; the pollination gun 1 is connected to the connecting ball 301 in a damping rotation, and the connecting ball 301 is set as a central structure; the connecting ball 301 is provided with a second connecting part 30101, the telescopic powder spraying tube 2 is fixedly connected to the second connecting part 30101, and the second connecting part 30101 is set as a central structure; the telescopic powder spraying tube 2 is connected to the powder inlet pipe 1001 through the connecting ball 301 and the second connecting part 30101.

[0029] It also includes a limiting block 302; the limiting block 302 is slidably connected to the pollination gun 1, and the pollination gun 1 is screwed with a pressing part 30201 through the mounting block.

[0030] A rubber layer is provided at the contact portion between the limiting block 302 and the connecting ball 301 to increase friction.

[0031] It also includes a water inlet pipe 303; the second connecting portion 30101 is connected to the water inlet pipe 303; and a solenoid valve is provided at the pollen inlet pipe 1001 of the pollination gun 1.

[0032] The mounting ring 201 is detachably connected to the fixing portion 3001 of the nozzle 3 ; a limiting rod 20101 is inserted into the mounting ring 201 , and the limiting rod 20101 is screwed to the fixing portion 3001 .

[0033] The working steps of this embodiment are: The growing position of the lychee flower bouquet on the tree is high or low, inside or outside. In order to make the pollen reach the flower bouquet smoothly and improve the success rate of pollination, the angle of the nozzle 3 needs to be adjusted during pollination. Taking the view from top to bottom as the reference, at this time, the pressing part 30201 only needs to be rotated counterclockwise to make the pressing part 30201 away from the limiting block 302, and the limiting block 302 no longer squeezes and restricts the connecting ball 301, thereby releasing the limit on the connecting ball 301, and then the second connecting part 30101 of the connecting ball 301 is manually held and rotated according to the position of the flower bouquet. , thereby driving the telescopic powder spraying tube 2 and the nozzle 3 to rotate together, thereby realizing the angle adjustment of the nozzle 3. When the angle adjustment is completed, based on the view from top to bottom, the manual operation only needs to rotate the pressing part 30201 clockwise to make the pressing part 30201 squeeze the limit block 302 to move downward, and the limit block 302 re-restricts the connecting ball 301, and at the same time limits it through the rubber layer on the limit block 302, thereby increasing the friction between the limit block 302 and the connecting ball 301, thereby preventing the telescopic powder spraying tube 2 from being squeezed by the branches and rotating during the subsequent pollination process.

[0034] During the pollination process, the pollen sprayed by the nozzle 3 will inevitably adhere to the inner wall of the wind shield 202, and will gradually fall on the stigma of the female flower that needs to be pollinated during the subsequent movement of the pollination gun 1. The pollen adheres to the inner wall of the wind shield 202 for a long time, and its activity will gradually weaken, resulting in a lower pollination success rate. To solve the above problem, it is necessary to regularly clean the pollen adhered to the inner wall of the wind shield 202. At this time, the limit rod 20101 is manually held and rotated outward to be pulled out of the fixing portion 3001 of the nozzle 3 to release the restriction on the mounting ring 201, and then the mounting ring 201 and the wind shield are dragged. 202 moves toward the pollination gun 1, so that the mounting ring 201 and the wind shield 202 slide rightward relative to the four extrusion blocks 203, so that the extrusion blocks 203 scrape the inner wall of the wind shield 202, and clean the pollen adhering to the inner wall of the wind shield 202, so as to prevent the pollen remaining on the inner wall of the wind shield 202 from affecting the pollination success rate of the bouquet. After the cleaning is completed, the mounting ring 201 and the wind shield 202 are manually dragged back to the initial position, and the limiting rod 20101 is rotated to be inserted back into the fixing part 3001 of the nozzle 3, thereby realizing the limiting, and preventing the mounting ring 201 and the wind shield 202 from being separated from the fixing part 3001 during the subsequent pollination process.

[0035] When pollination is completed, it is usually necessary to disassemble the telescopic powder spray tube 2 to clean the inside of the telescopic powder spray tube 2, but this method is relatively cumbersome, and frequent disassembly is easy to cause damage to the device. To solve the above problem, when the telescopic powder spray tube 2 needs to be cleaned, close the solenoid valve of the powder inlet pipe 1001 in the pollination gun 1, then connect the water pipe to the water inlet pipe 303, and then pass the cleaning agent into the water inlet pipe 303. The pollen and impurities remaining in the telescopic powder spray tube 2 will flow out from the nozzle 3 with the cleaning agent, thereby achieving cleaning.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A handheld pollination gun for litchi trees, comprising a pollination gun (1) and a telescopic powder spraying tube (2); a pollination gun (1) is provided with a powder inlet tube (1001); a telescopic powder spraying tube (2) is installed on the pollination gun (1), and the telescopic powder spraying tube (2) is connected to the powder inlet tube (1001); characterized in that: The invention also comprises a nozzle (3), an extrusion ring (4), an adjustment switch (5), a driving component and a windproof component; the nozzle (3) is fixedly connected to the left end of the telescopic powder spraying tube (2); the left opening of the nozzle (3) is a pollination opening; the nozzle (3) is composed of a fixed part (3001), four rotating rods (3002) and four first connecting parts (3003); the fixed part (3001) is fixedly connected to the telescopic powder spraying tube (2); the first connecting part (3003) is made of elastic deformation material; A drive assembly is provided; the drive assembly is connected to an extrusion ring (4), and the drive assembly is used to drive the extrusion ring (4) to adjust the size of the nozzle (3); a bellows (2001) is provided between the left side of the telescopic powder spraying tube (2) and the extrusion ring (4), and the bellows (2001) is connected to the telescopic powder spraying tube (2); an adjustment switch (5) is installed on the pollination gun (1), and the adjustment switch (5) is connected to the drive assembly via an electrical signal; and a windproof assembly for preventing pollen from being blown away is installed on the fixing portion (3001).

2. A handheld pollination gun for litchi trees according to claim 1, characterized in that: The windproof component comprises a mounting ring (201) and a windproof cover (202); the mounting ring (201) is mounted on the fixing portion (3001) of the nozzle (3); and the windproof cover (202) is connected to the mounting ring (201) for preventing pollen from being blown away.

3. A handheld pollination gun for litchi trees according to claim 2, characterized in that: It also includes an extrusion block (203); a plurality of extrusion blocks (203) are fixedly connected to the nozzle (3), and each extrusion block (203) is fixedly connected to an adjacent rotating rod (3002) on the nozzle (3); the wind shield (202) is composed of six support rods and six shielding cloths, the shielding cloths are elastic, the extrusion blocks (203) are in contact with the support rods of the wind shield (202), and the support rods of the wind shield (202) are rotatably connected to the fixing portion (3001).

4. A handheld pollination gun for litchi trees according to claim 2, characterized in that: The distance from the left side of the wind shield (202) to the nozzle (3) is the optimal distance suitable for pollination.

5. The handheld pollination gun for litchi trees according to claim 1, characterized in that: The invention also comprises a connecting ball (301); the pollination gun (1) is connected to the connecting ball (301) in a damping rotation manner, and the connecting ball (301) is configured as a centrally-through structure; the connecting ball (301) is provided with a second connecting portion (30101), the telescopic powder spraying tube (2) is fixedly connected to the second connecting portion (30101), and the second connecting portion (30101) is configured as a centrally-through structure; the telescopic powder spraying tube (2) is connected to the powder inlet tube (1001) via the connecting ball (301) and the second connecting portion (30101).

6. A handheld pollination gun for litchi trees according to claim 5, characterized in that: It also includes a limit block (302); the limit block (302) is slidably connected to the pollination gun (1), and the pollination gun (1) is screwed with a pressing portion (30201) via the mounting block.

7. A handheld pollination gun for litchi trees according to claim 6, characterized in that: A rubber layer is provided at the contact portion between the limiting block (302) and the connecting ball (301).

8. The handheld pollination gun for litchi trees according to claim 5, characterized in that: It also includes a water inlet pipe (303); the second connecting portion (30101) is connected to a water inlet pipe (303) for easy cleaning; and a solenoid valve is provided at the pollination gun (1) at the pollination pipe (1001).

9. A handheld pollination gun for litchi trees according to claim 2, characterized in that: The mounting ring (201) and the fixing portion (3001) of the nozzle (3) are detachably connected; a limiting rod (20101) is inserted into the mounting ring (201), and the limiting rod (20101) is screwed to the fixing portion (3001).

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