Portable hot air weeding device

Abstract

The invention relates to the technical field of weeding equipment, and particularly discloses a portable hot air weeding device which comprises a shell, the inner side of the shell is hollow, a fan is arranged on the inner surface of the shell, an air inlet hole is formed in the outer surface of the right end of the shell in a penetrating mode, and a preheating assembly is arranged on the inner side of the shell. Weed branches and trunks are blown through high-temperature gas, the weed branches and trunks are carbonized and deteriorated under the action of high temperature, meanwhile, part of the high-temperature gas can enter brick joints, heat can be transmitted to rhizomes of weeds through floor tiles and soil, the rhizomes of the weeds can be heated and inactivated, and therefore the weed regeneration probability can be reduced, and the weed regeneration efficiency can be improved. Weed seeds and worm eggs on the surface layer of soil are killed through high-temperature gas, so that the weed removing effect can be further improved, the spraying pipe can be flexibly aligned with weeds, the operation precision of the hot air weeding equipment can be improved, the operation difficulty can be effectively reduced, and meanwhile waste of hot air in the alignment process of the spraying pipe can be reduced.

Description

Technical Field

[0001] This invention relates to the field of weeding equipment technology, and in particular to a portable hot air weeding device. Background Technology

[0002] Weeding is a common need in agriculture, horticulture and land management. There are many different methods, including chemical weeding, biological weeding and physical weeding. Among them, hot air weeding is a technology that uses high temperature hot air to physically remove weeds. Its core principle is to destroy the cell structure of weeds by instantaneous high temperature, causing them to lose water, wither and die. It also kills insect eggs and pupae.

[0003] Hot air weeding equipment achieves efficient and environmentally friendly control of weeds and pests through high-temperature physical means, which can effectively reduce the environmental impact of chemical pesticides. For example, Chinese patent with announcement number CN210929337U discloses a convenient and efficient multi-functional lithium battery weeder. When the device is working, hot air is discharged through the hot air pipe to the heat conduction net. The weeds are heated and burned to death by the hot air inside the weeding attachment. At the same time, the dual-net heat conduction can ensure the output of hot air and prevent impurities from entering the machine.

[0004] For paved surfaces in parks, due to the high vegetation coverage, weed seeds easily grow between the bricks. Manual removal can easily loosen the bricks. Therefore, hot air weeding equipment is usually used to remove weeds. However, while existing hot air weeding equipment can remove weeds using high-temperature gas, its large size and long hot air pipe extension make it difficult for users to aim the hot air at the weeds. Since the weeds in the brick gaps are mostly scattered, it takes more time to aim the hot air outlet, which not only affects the weeding efficiency but also causes additional heat loss during the aiming process, thus adversely affecting the heat utilization efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a portable hot air weeding device with a nozzle that can be flexibly aimed at weeds, which helps to improve the operating accuracy of the hot air weeding equipment and solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a portable hot air weeding device, comprising a housing, the inner side of which is hollow, a fan disposed on the inner surface of the housing, an air inlet permeating the outer surface of the right end of the housing, a preheating component disposed on the inner side of the housing, the preheating component comprising a pad fixedly connected to the inner surface of the housing, a support rod fixedly connected to the outer surface of the pad, a heating wire fixedly connected to the outer surface of the support rod, a fixing sleeve fixedly connected to the outer surface of the left end of the housing, a spray pipe fixedly connected to the left side of the fixing sleeve, a connecting plate one and a connecting plate two fixedly connected to the inner surface of the fixing sleeve, a guide plate one fixedly connected to the left end of the connecting plate one, and a guide plate two fixedly connected to the left end of the connecting plate two.

[0007] Preferably, the number of the first and second guide plates are several sets and they are staggered. The first and second guide plates are both arc-shaped. The second guide plate is partially attached to the outside of the first guide plate. The first and second guide plates are in sliding contact. The first and second guide plates are both made of high-temperature resistant material. The first and second connecting plates are staggered and made of elastic material.

[0008] Preferably, the number of the support rods and the heating wires are two sets and they are arranged in parallel. The heating wires are arranged in a ring shape. The number of air inlets is several sets and they are arranged in a ring array. The support rods and the pads are made of heat-insulating materials.

[0009] Preferably, a flow-dispersing component is provided inside the fixed sleeve. The flow-dispersing component includes a rotating shaft that is rotatably connected to the support rod. Fan blades are fixedly connected to the outer surface of the rotating shaft. The number of fan blades is several groups and they are arranged in a ring array. The fan blades are located between two groups of heating wires.

[0010] Preferably, the inner surface of the nozzle is conical, and an adjustment component is provided on the inner side of the nozzle. The adjustment component includes a guide groove formed on the inner surface of the nozzle. A movable seat two is slidably connected to the inner side of the guide groove. An extrusion tube is fixedly connected to the outer surface of the upper end of the movable seat two. The extrusion tube is hollow and arc-shaped. The outer surface of the extrusion tube is in slidable contact with the outer side of the guide plate two. The number of extrusion tubes is several groups, and the guide plate one is correspondingly distributed.

[0011] Preferably, a driving component is provided on the outer side of the second movable seat. The driving component includes a sliding groove formed on the inner side of the second movable seat, which extends to the lower side of the second movable seat. A cavity is embedded in the inner side of the nozzle. The cavity is distributed in a circular shape. The guide groove has a T-shaped structure and its lower end is connected to the inside of the cavity. The number of guide grooves and the number of the first and second movable seats are both several sets and distributed in a circular array.

[0012] Preferably, a motor is fixedly connected to the inner side of the cavity, and a reciprocating lead screw is fixedly connected to the motor's conveying shaft. The reciprocating lead screw passes through both ends of the movable seat and is screw-driven to the movable seat. The left end of the reciprocating lead screw is rotatably connected to the inner surface of the cavity. A movable plate is fixedly connected to the end of the movable seat away from the extrusion tube. The movable plate is annular.

[0013] Preferably, a flow guiding assembly is provided inside the fixed sleeve. The flow guiding assembly includes an air guiding sleeve fixedly connected to the inner surface of the fixed sleeve. The air guiding sleeve is conical and in close contact with the inner surface of the first flow guiding plate. The air guiding sleeve is made of a flexible high-temperature resistant material. Traction plates are fixedly connected to the outer surfaces of the first connecting plate and the second connecting plate. The lower end of the traction plate is fixedly connected to the inner surface of the fixed sleeve. The traction plate is made of an elastic material and slides in contact with the inner surface of the cavity.

[0014] Preferably, a protective component is provided on the left side of the nozzle. The protective component includes a mesh fixedly connected to the left end of the guide plate. The outer surface of the mesh is arc-shaped, and a fixing rod is fixedly connected to the outer surface of the mesh. The fixing rod is ring-shaped, and both the mesh and the fixing rod are made of elastic material.

[0015] Preferably, a handle is fixedly connected to the lower side of the outer surface of the housing, a switch is provided on the left side of the outer surface of the handle, a power cord is fixedly connected to the lower side of the handle, and a standard plug is electrically connected to the end of the power cord away from the handle.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This solution uses a preheating component to blow high-temperature gas onto the branches and stems of weeds. The branches and stems are carbonized and deteriorated under high temperature. At the same time, some of the high-temperature gas enters the brick joints, and the heat is transferred to the roots and stems of the weeds through the bricks and soil. This heats and inactivates the roots and stems of the weeds, thereby reducing the chance of weed regeneration. The high temperature also kills weed seeds and insect eggs on the soil surface, further improving the weed removal effect. The nozzle can be flexibly aimed at the weeds, which helps to improve the operating accuracy of the hot air weeding equipment. This not only effectively reduces the difficulty of operation, but also reduces the waste of hot air during the nozzle aiming process.

[0018] 2. This solution, by setting up an adjustment component, can adjust the blowing range of high-temperature gas, which not only enables the high-temperature gas to be blown more precisely on the surface of weeds, thus improving the accuracy of weed removal and matching the blowing area of ​​the high-temperature gas with the volume of weeds, but also reduces the additional loss of high-temperature gas to a certain extent, thereby improving the efficiency of heat utilization.

[0019] 3. This solution incorporates a turbulence-inducing component. The rotation of the fan blades disturbs the air between the two sets of heating wires, thereby slowing down the airflow speed between them. This allows the air to fully contact the heating wires, improving the heating quality and ensuring the air reaches the predetermined temperature to blow away the weeds. This guarantees that the hot air has sufficient heat to thoroughly remove the weeds, thus ensuring the weeding effect of the weeding device. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0023] Figure 3 This is a left view of the overall structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 Sectional view along line AA;

[0025] Figure 5 This is a schematic diagram of the internal structure of the fixing sleeve of the present invention;

[0026] Figure 6 For the present invention Figure 4 Enlarged view of point B in the middle;

[0027] Figure 7 For the present invention Figure 4 Enlarged view of point C in the middle;

[0028] Figure 8 For the present invention Figure 4 Enlarged diagram of point D in the middle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 11. Housing; 12. Switch; 13. Power cord; 14. Fixing sleeve; 15. Handle; 16. Air inlet; 17. Nozzle; 18. Pad; 19. Partition net; 20. Fixing rod; 21. Support rod; 22. Shaft; 23. Heating wire; 24. Fan blade; 25. Connecting plate one; 26. Guide plate one; 27. Guide plate two; 29. ​​Guide groove; 30. Reciprocating screw; 31. Cavity; 32. Movable plate; 33. Moving seat one; 34. Moving seat two; 35. Extrusion tube; 36. Slide groove; 37. Motor; 38. Traction plate; 39. Air guide sleeve; 40. Fan; 41. Connecting plate two. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 8 This invention provides a technical solution:

[0033] A portable hot air weeding device includes a housing 11, the inner side of which is hollow. A fan 40 is provided on the inner surface of the housing 11. An air inlet 16 is provided through the outer surface of the right end of the housing 11. A preheating component is provided inside the housing 11. The preheating component includes a pad 18 fixedly connected to the inner surface of the housing 11. A support rod 21 is fixedly connected to the outer surface of the pad 18. An electric heating wire 23 is fixedly connected to the outer surface of the support rod 21. A fixing sleeve 14 is fixedly connected to the outer surface of the left end of the housing 11. A spray pipe 17 is fixedly connected to the left side of the fixing sleeve 14. A connecting plate 25 and a connecting plate 41 are fixedly connected to the inner surface of the fixing sleeve 14. A guide plate 26 is fixedly connected to the left end of the connecting plate 25. A guide plate 27 is fixedly connected to the left end of the connecting plate 41.

[0034] There are several sets of deflector 1 26 and deflector 27, which are staggered. Both deflector 1 26 and deflector 27 are arc-shaped. Deflector 27 is partially attached to the outside of deflector 1 26. Deflector 1 26 and deflector 27 are in sliding contact. Both deflector 1 26 and deflector 27 are made of high temperature resistant material. Connecting plate 1 25 and connecting plate 2 41 are staggered and made of elastic material.

[0035] The number of support rods 21 and heating wires 23 are two sets and they are distributed in parallel. The heating wires 23 are distributed in a ring shape. The number of air inlets 16 is several sets and they are distributed in a ring array. The support rods 21 and the pads 18 are both made of heat-insulating materials.

[0036] By adopting the above technical solution, when the hot air weeding device removes weeds between brick joints, the blower 40 is started and operated. The blower 40 draws outside air into the housing 11 through the air inlet 16 at the right end of the housing 11. The housing 11, together with the fixing sleeve 14 and the nozzle 17, forms an airflow passage. The housing 11 is fixedly supported by the support rod 21 by the pad 18. The support rod 21 supports the heating wire 23. The heating wire 23 continuously generates heat during operation. When the air flows inside the housing 11... The heating element 23 will contact the surface of the heating wire 23, heating the air. The two sets of heating wires 23 are arranged in a ring shape, which can effectively increase the contact area with the air, thereby effectively improving the heating efficiency of the air. The fixing sleeve 14 supports the guide plate 26 and the guide plate 27 through the connecting plate 1 25 and the connecting plate 2 41 respectively. Several sets of guide plates 1 26 and guide plates 27 form two sets of rings. The guide plates 1 26 and guide plates 27 are staggered and the guide plate 27 is attached to the guide plate. The nozzle 17 is positioned outside the first guide plate 26 and at the joint between two adjacent sets of guide plates 26, allowing the first guide plate 26 and the second guide plate 27 to form a complete circular tube. When hot air flows through the circular tube formed by the first guide plate 26 and the second guide plate 27, it applies a certain pressure to the first guide plate 26 and the second guide plate 27, making the first guide plate 26 and the second guide plate 27 fit more tightly. The nozzle 17 can then flexibly aim at the weeds and blow the weed branches with the high-temperature gas, causing the weed branches to be blown about at high temperature. Under the influence of heat, the weeds carbonize and deteriorate, and some of the high-temperature gas enters the brick joints. The heat is then transferred through the bricks and soil to the roots and stems of the weeds, thus heating and inactivating them and reducing the chance of weed regeneration. The high temperature also kills weed seeds and insect eggs on the soil surface, further improving the weed control effect. Furthermore, by using hot air weeding, the use of chemical herbicides can be reduced while ensuring the weed control effect, thereby reducing the environmental impact of the weeding process.

[0037] Specifically, such as Figure 4 and Figure 7 As shown, a turbulence-disrupting assembly is provided inside the fixed sleeve 14. The turbulence-disrupting assembly includes a rotating shaft 22 that is rotatably connected to the support rod 21. Fan blades 24 are fixedly connected to the outer surface of the rotating shaft 22. The number of fan blades 24 is several groups and they are arranged in a ring array. The fan blades 24 are located between two groups of heating wires 23.

[0038] By adopting the above technical solution, a turbulence component is set up to ensure that the air makes full contact with the heating wire 23. When the air flows inside the housing 11, the air blows the fan blade 24, which drives the rotating shaft 22 to rotate between the two sets of heating wires 23. The rotation of the fan blade 24 can turbulent the air between the two sets of heating wires 23, thereby slowing down the air flow speed between the two sets of heating wires 23 to a certain extent. This allows the air to make full contact with the heating wires 23, thereby improving the heating quality of the air and enabling the air to reach the predetermined temperature to blow away the weeds. This ensures that the hot air has enough heat to completely remove the weeds, thus ensuring the weeding effect of the weeding device.

[0039] Specifically, such as Figure 4 , Figure 5 and Figure 6 As shown, the inner surface of the nozzle 17 is conical, and an adjustment assembly is provided on the inner side of the nozzle 17. The adjustment assembly includes a guide groove 29 formed on the inner surface of the nozzle 17. A movable seat 34 is slidably connected to the inner side of the guide groove 29. A squeezing tube 35 is fixedly connected to the outer surface of the upper end of the movable seat 34. The squeezing tube 35 is hollow and arc-shaped. The outer surface of the squeezing tube 35 is in sliding contact with the outer side of the guide plate 27. There are several groups of squeezing tubes 35, which are distributed corresponding to the guide plate 26.

[0040] By adopting the above technical solution, the hot air weeding device is equipped with an adjustment component to flexibly adjust the blowing range of the hot air according to the volume of the weeds during use. When it is necessary to reduce the blowing range of the hot air, the operator slides the second movable seat 34 along the guide groove 29 inside the nozzle 17. The lower end of the second movable seat 34 is located inside the guide groove 29, which provides sliding guidance for the second movable seat 34. During the movement, the second movable seat 34 drives the extrusion tube 35 to move synchronously. The inner surface of the nozzle 17 is conical. When the second movable seat 34 moves towards the fixed sleeve 14, several sets of the second movable seats 34 will drive the extrusion tubes 35 to gradually converge during the movement. At this time, the extrusion tubes 35 slide in contact with the outer surface of the second guide plate 27, pushing the second guide plate 27. The second guide plate 27 will then... The connecting plate 41 swings to a certain extent, causing the guide plate 27 to gradually converge away from the fixed sleeve 14. At this time, the blowing area of ​​the high-temperature gas will decrease accordingly. This not only allows the high-temperature gas to be blown more accurately on the surface of the weeds, which helps to improve the accuracy of weed removal and makes the blowing area of ​​the high-temperature gas match the volume of the weeds, but also reduces the extra loss of high-temperature gas to a certain extent, thereby improving the heat utilization efficiency. When it is necessary to increase the blowing range of the high-temperature gas for larger weeds, the moving seat 34 and the extrusion tube 35 are moved in opposite directions. At this time, the connecting plate 25 and the connecting plate 41 swing back to their original positions under their own elastic force, thereby increasing the diameter of the ring formed by the guide plate 26 and the guide plate 27, which increases the blowing area of ​​the high-temperature gas.

[0041] Specifically, such as Figure 6 and Figure 8 As shown, a drive assembly is provided on the outer side of the second movable seat 34. The drive assembly includes a sliding groove 36 opened on the inner side of the second movable seat 34. The sliding groove 36 extends to the lower side of the second movable seat 34. A cavity 31 is embedded in the inner side of the nozzle 17. The cavities 31 are distributed in a circular shape. The guide groove 29 has a T-shaped structure and its lower end is connected to the inside of the cavity 31. The guide groove 29, the first movable seat 33, and the second movable seat 34 are all in several groups and are distributed in a circular array.

[0042] A motor 37 is fixedly connected to the inside of the cavity 31. A reciprocating screw 30 is fixedly connected to the conveying shaft of the motor 37. The reciprocating screw 30 passes through the left and right ends of the moving seat 33 and is screw-driven to the moving seat 33. The left end of the reciprocating screw 30 is rotatably connected to the inner surface of the cavity 31. A movable plate 32 is fixedly connected to the end of the moving seat 33 away from the extrusion tube 35. The movable plate 32 is annular and slides in contact with the inner surface of the cavity 31.

[0043] By adopting the above technical solution, the cavity 31 inside the nozzle 17 is used to fix and install the motor 37. When the motor 37 is started, the conveyor shaft of the motor 37 drives the reciprocating screw 30 to rotate synchronously. The reciprocating screw 30 is connected to the movable seat 33 by a screw drive. During the rotation, it drives the movable seat 33 to move along the axis of the reciprocating screw 30. During the movement of the movable seat 33, it drives the movable plate 32 to slide along the inner wall of the cavity 31. During the movement of the movable plate 32, it drives the other sets of movable seats 33 to move synchronously. The movement of the guide vanes 26 and 27 allows them to converge and contract synchronously, thereby improving the adjustment accuracy of the high-temperature gas ejection range to a certain extent. During the movement of the moving seat 33, the moving seat 24 will move synchronously. The lower end of the moving seat 24 is located inside the guide groove 29. As the moving seat 33 and the moving seat 24 move toward the fixed sleeve 14, the moving seat 24 will slide upward along the outer surface of the moving seat 33 through the sliding groove 36, thereby ensuring that the moving seat 33 and the moving seat 24 always remain synchronized.

[0044] Specifically, such as Figure 4 As shown, a flow guiding assembly is provided inside the fixed sleeve 14. The flow guiding assembly includes an air guiding sleeve 39 that is fixedly connected to the inner surface of the fixed sleeve 14. The air guiding sleeve 39 is conical and in close contact with the inner surface of the flow guiding plate 26. The air guiding sleeve 39 is made of flexible high-temperature resistant material. A traction plate 38 is fixedly connected to the outer surface of both the connecting plate 25 and the connecting plate 41. The lower end of the traction plate 38 is fixedly connected to the inner surface of the fixed sleeve 14. The traction plate 38 is made of elastic material.

[0045] By adopting the above technical solution, the air guide sleeve 39 inside the fixed sleeve 14 can play a certain guiding role for the high-temperature gas, thereby effectively reducing the amount of high-temperature gas entering between the nozzle 17 and the guide plate 27. The air guide sleeve 39 can also play a certain heat insulation role, which helps to reduce the heat transfer to the shell 11, thereby keeping the temperature of the shell 11 within an appropriate range. The traction plate 38 can apply a certain elastic force to the connecting plate 25 and the connecting plate 41, which not only makes the connecting plate 25 and the connecting plate 41 drive the guide plate 26 and the guide plate 27 to reset more accurately, but also makes the guide plate 26 and the guide plate 27 fit more tightly, thereby reducing the loss of high-temperature gas to a certain extent.

[0046] Specifically, such as Figure 1 and Figure 4 As shown, a protective assembly is provided on the left side of the nozzle 17. The protective assembly includes a mesh 19 fixedly connected to the left end of the guide plate 27. The outer surface of the mesh 19 is arc-shaped, and a fixing rod 20 is fixedly connected to the outer surface of the mesh 19. The fixing rod 20 is ring-shaped. Both the mesh 19 and the fixing rod 20 are made of elastic material.

[0047] A handle 15 is fixedly connected to the lower side of the outer surface of the housing 11. A switch 12 is provided on the left side of the outer surface of the handle 15. A power cord 13 is fixedly connected to the lower side of the handle 15. A standard plug is electrically connected to the end of the power cord 13 away from the handle 15.

[0048] By adopting the above technical solution, in order to reduce the obstruction between guide plate 1 26 and guide plate 27 caused by weed blades entering the nozzle 17, a protective component is set up. Guide plate 27 can fix the mesh 19. The outer surface of mesh 19 is arc-shaped and protrudes from the outside of nozzle 17. The fixing rod 20 can effectively strengthen the structural strength of mesh 19. When the hot air weeding device is working, mesh 19 will block weeds to a certain extent, thereby reducing the probability of weeds entering the nozzle 17 and reducing the obstruction between guide plates 26 and guide plate 27. The risk of jamming between the first 26 and the second 27 of the deflector is reduced, thereby improving the stability of the weeding device during operation. When the second 27 of the deflector retracts, the partition 19 will undergo a certain degree of elastic deformation, so that the partition 19 can always match the range of high-temperature gas blowing. The handle 15 on the lower side of the housing 11 facilitates hand operation. One end of the power cord 13 is equipped with a standard plug, which can be adapted to different power devices, such as batteries, thereby effectively improving the convenience of using the weeding device.

[0049] Working principle: When the hot air weeding device is working, the fan 40 draws outside air into the housing 11 through the air inlet 16 at the right end of the housing 11. As the air flows inside the housing 11, it comes into contact with the surface of the heating wire 23, which heats the air. The rotation of the fan blades 24 disturbs the air between the two sets of heating wires 23, thus slowing down the airflow speed between them. The high-temperature gas blows onto the weed branches, causing them to carbonize and deteriorate under high temperature. Simultaneously, some of the high-temperature gas enters the brick joints, and the heat is transferred through the bricks and soil to the roots of the weeds, thus heating and inactivating them. The motor 37 reciprocates... The lead screw 30 drives the moving seat 33 to move. During the movement of the moving seat 33, the moving seat 33 will drive the moving seat 34 to move synchronously. During the movement of the moving seat 34, the squeezing tube 35 will move synchronously. The sliding contact between the squeezing tube 35 and the outer surface of the guide plate 27 will push the guide plate 27, causing the end of the guide plate 27 away from the fixed sleeve 14 to gradually converge. At this time, the blowing area of ​​the high temperature gas will decrease accordingly. This not only allows the high temperature gas to be blown more accurately on the surface of the weeds, but the mesh 19 will also play a certain role in blocking the weeds, thereby reducing the probability of weeds entering the nozzle 17 and reducing the risk of the guide plate 26 and the guide plate 27 getting stuck. This will improve the stability of the weeding device during operation.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable hot air weeding device comprising a housing (11), characterised in that: The inside of the shell (11) is hollow, the inner surface of the shell (11) is provided with a fan (40), the right end of the outer surface of the shell (11) is provided with an air inlet hole (16), the inside of the shell (11) is provided with a preheating assembly, the preheating assembly comprises a backing plate (18) fixedly connected with the inner surface of the shell (11), the outer surface of the backing plate (18) is fixedly connected with a support rod (21), the outer surface of the support rod (21) is fixedly connected with an electric heating wire (23), the left end of the outer surface of the shell (11) is fixedly connected with a fixed sleeve (14), the left side of the fixed sleeve (14) is fixedly connected with a nozzle (17), the inner surface of the fixed sleeve (14) is fixedly connected with a connecting plate one (25) and a connecting plate two (41), the left end of the connecting plate one (25) is fixedly connected with a guide plate one (26), the left end of the connecting plate two (41) is fixedly connected with a guide plate two (27).

2. A portable thermal weed-killing device according to claim 1, characterised in that: The number of the guide plate one (26) and the guide plate two (27) is several groups and is staggered, the guide plate one (26) and the guide plate two (27) are arc-shaped, the guide plate two (27) is partially attached to the outside of the guide plate one (26), the guide plate one (26) and the guide plate two (27) are in sliding contact, the guide plate one (26) and the guide plate two (27) are made of high-temperature-resistant material, the connecting plate one (25) and the connecting plate two (41) are staggered and made of elastic material.

3. A portable thermal weed-killing device according to claim 2, wherein: The number of the support rod (21) and the electric heating wire (23) is two groups and is parallelly distributed, the electric heating wire (23) is circularly distributed, the number of the air inlet hole (16) is several groups and is annularly arrayed, the support rod (21) and the backing plate (18) are made of heat-insulating material.

4. A portable thermal weed-killing device according to claim 3, wherein: The inside of the fixed sleeve (14) is provided with a turbulence assembly, the turbulence assembly comprises a rotating shaft (22) rotatably connected with the support rod (21), the outer surface of the rotating shaft (22) is fixedly connected with a fan blade (24), the number of the fan blade (24) is several groups and is annularly arrayed, the fan blade (24) is located between the two groups of electric heating wires (23).

5. A portable thermal weed-killing device according to claim 4, wherein: The inner surface of the nozzle (17) is conical, the inside of the nozzle (17) is provided with an adjusting assembly, the adjusting assembly comprises a guide groove (29) formed in the inner surface of the nozzle (17), the inside of the guide groove (29) is slidably connected with a moving seat two (34), the outer surface of the upper end of the moving seat two (34) is fixedly connected with an extrusion pipe (35), the extrusion pipe (35) is hollow and arc-shaped, the outer surface of the extrusion pipe (35) is in sliding contact with the outside of the guide plate two (27), the number of the extrusion pipe (35) is several groups and is correspondingly distributed with the guide plate one (26).

6. A portable thermal weed-killing device according to claim 5, wherein: The moving seat two (34) is provided with a drive assembly outside, the drive assembly includes a sliding groove (36) provided inside the moving seat two (34), the sliding groove (36) penetrates to the lower side of the moving seat two (34), the inside of the spray pipe (17) is embedded with a cavity (31), the cavity (31) is circularly distributed, the guide groove (29) is T-shaped structure and the lower end is communicated with the inside of the cavity (31), the number of the guide groove (29), the moving seat one (33) and the moving seat two (34) is several groups and is circularly arrayed.

7. A portable thermal weed-killing device according to claim 6, wherein: The inside of the cavity (31) is fixedly connected with a motor (37), the transmission shaft of the motor (37) is fixedly connected with a reciprocating screw rod (30), the reciprocating screw rod (30) penetrates through the left and right ends of the moving seat one (33) and is screw transmission connected with the moving seat one (33), the left end of the reciprocating screw rod (30) is rotationally connected with the inner surface of the cavity (31), the moving seat one (33) is fixedly connected with a movable plate (32) away from one end of the extrusion pipe (35), and the movable plate (32) is circularly arranged.

8. A portable thermal weed-killing device according to claim 7, wherein: The fixed sleeve (14) is provided with a flow guide assembly inside, the flow guide assembly includes a gas guide sleeve (39) fixedly connected with the inner surface of the fixed sleeve (14), the gas guide sleeve (39) is conical and in contact with the inner surface of the flow guide plate one (26), the gas guide sleeve (39) is made of flexible high-temperature resistant material, the outer surfaces of the connecting plate one (25) and the connecting plate two (41) are fixedly connected with a traction plate (38), the lower end of the traction plate (38) is fixedly connected with the inner surface of the fixed sleeve (14), the traction plate (38) is made of elastic material and in sliding contact with the inner surface of the cavity (31).

9. A portable thermal weed-killing device according to claim 8, wherein: The left side of the spray pipe (17) is provided with a protection assembly, the protection assembly includes a screen (19) fixedly connected with the left end of the flow guide plate two (27), the outer surface of the screen (19) is arc-shaped, the outer surface of the screen (19) is fixedly connected with a fixed rod (20), the fixed rod (20) is circularly arranged, and the screen (19) and the fixed rod (20) are made of elastic material.

10. A portable thermal weed-killing device according to claim 9, wherein: The outer surface of the shell (11) is fixedly connected with a handle (15) at the lower side, the outer surface of the handle (15) is provided with a switch (12) at the left side, the lower side of the handle (15) is fixedly connected with a power cord (13), and the power cord (13) is electrically connected with a standard plug at the end away from the handle (15).

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