Portable circulating firepower firewood stove

Abstract

The invention relates to the field of combustion product treatment, in particular to a portable circulating firepower firewood stove which comprises a main barrel, a discharging groove is formed in the lower end of the main barrel, a blocking circular plate is in threaded connection with the interior of the discharging groove, supporting legs are further arranged at the lower end of the main barrel, and a feeding groove is formed in one side of the main barrel; a combustion unit used for containing firewood and combusting the firewood is arranged in the main barrel, a sleeve is further slidably arranged on the inner wall of the main barrel, one side of the sleeve is located at the outer end of the sleeve, and a secondary combustion assembly used for secondary recycling of firewood combustion gas is arranged in the sleeve. At the moment, firewood can be combusted in the combustion unit, meanwhile, the firewood is blown through the air blowing assembly, the firewood can be fully combusted, flames and smoke generated by firewood combustion can enter the secondary combustion assembly, the flames and the smoke can be subjected to mixed combustion in the secondary combustion assembly, the temperature is increased, and the combustion efficiency is improved. And meanwhile, the combustion temperature of the firewood is utilized to the maximum.

Description

Technical Field

[0001] The invention relates to the field of combustion product treatment, and in particular to a portable circulating firewood stove. Background Art

[0002] A portable circulating firewood stove is an efficient and environmentally friendly cooking device designed specifically for outdoor activities. It greatly improves fuel efficiency and reduces smoke and harmful gas emissions by optimizing the combustion process. This stove usually adopts a portable design, which is easy to carry and use. It is suitable for camping, hiking and other occasions, and embodies the concept of sustainable energy utilization. It not only meets the basic needs of outdoor enthusiasts for cooking and heating, but also pays attention to environmental protection in design, making it an ideal choice for outdoor activities.

[0003] However, in order to be portable enough, most of the existing portable circulating firewood stoves have only one combustion chamber, and the firewood can only be burned in a separate combustion chamber, which means that it cannot ensure that the firewood can be fully burned. The residual combustion gas of the firewood causes waste, and the smoke and dust generated will also float out of the stove, causing people to be choked by the smoke and dust, and it is easy to cause environmental pollution.

[0004] For a more accurate comparison, a Chinese patent with publication number CN206682982U discloses a portable wood-burning stove.

[0005] It includes a disc structure extending outward at the top of the combustion chamber, the bottom of the disc structure is supported on the top of the furnace body to form a movable connection, so that an air channel is formed between the inner wall of the furnace body and the outer wall of the combustion chamber; a primary air inlet hole is opened around the lower part of the combustion chamber, and a secondary air inlet hole is opened at the lower end of the disc structure extending outward at the upper part of the combustion chamber; a feeding bracket is supported on the top of the combustion chamber by a movable connection structure, ventilation holes and feeding ports are opened around the feeding bracket, and a support rod is hinged on the upper end of the feeding bracket; the outer diameter of the feeding bracket is smaller than the diameter of the inner wall of the furnace body, and the outer diameter of the combustion chamber is smaller than the inner diameter of the feeding bracket.

[0006] However, the above-mentioned wood stove still has some shortcomings in actual use: 1. Although the above-mentioned wood stove can assist the secondary combustion of firewood through the air inlet hole, it is unable to fully utilize the smoke from the burning of the firewood for full combustion. The smoke that is not completely burned can be discharged from the above-mentioned wood stove through the feeding bracket, causing the surrounding personnel to be choked by the smoke. The smoke cannot be fully utilized, and it is easy to cause the burning speed of the firewood to accelerate, resulting in the need to use more firewood during use, resulting in a waste of firewood.

[0007] 2. After the use of the above-mentioned wood stove, although its legs can be stored, its feeding bracket and combustion chamber need to be disassembled separately, that is, personnel need to store and transport the feeding rack and combustion chamber separately, which reduces its portability. In addition, it still needs to occupy too large an area during the early carrying process, which further reduces its portability.

[0008] Therefore, under the above-stated viewpoint, the existing portable wood stoves still have room for improvement. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a portable circulating firewood stove, including a main barrel, a discharge trough is provided at the lower end of the main barrel, a sealing circular plate is threadedly connected to the discharge trough, a supporting leg is also provided at the lower end of the main barrel, a feed trough is provided on one side of the main barrel, a combustion unit for accommodating firewood and burning it is provided in the main barrel, a sleeve is also slidably provided on the inner wall of the main barrel and one side is located at its outer end, and a secondary combustion component for secondary recycling of the gas burned by the firewood is provided in the sleeve.

[0010] The combustion unit comprises a placement plate arranged on the inner wall of the main barrel, and the placement plate corresponds to the feed trough, and a plurality of strip grooves evenly distributed along the extension surface thereof are formed on the placement plate.

[0011] Preferably, the combustion unit further comprises an annular ring arranged on the inner wall of the main barrel, an arc ring is arranged on the annular ring, and a plurality of guide holes evenly distributed along the axis thereof are opened on the arc ring.

[0012] Preferably, the secondary combustion assembly also includes an arc-shaped cover arranged on the inner wall of the sleeve, and the arc-shaped cover corresponds to the arc-shaped ring, the opening in the middle of the arc-shaped cover corresponds to the opening in the middle of the arc-shaped ring, the middle opening of the arc-shaped cover corresponds to the upper and lower openings of the sleeve, and the inner side wall of the middle opening of the arc-shaped cover is arc-shaped, which is used to accommodate the bottom of the pot, and several arc-shaped grooves are opened on the arc-shaped cover.

[0013] Preferably, an annular groove is provided on the inner wall of the main barrel, a driving ring located in the annular groove is provided at the lower end of the sleeve, and the driving ring is slidably connected to the annular groove, a rotating screw rod with one end located in the annular groove is rotatably penetrated through the inner wall of the main barrel, and the rotating screw rod is threadedly connected to the driving end, and a rotating ring is sleeved on the end of the rotating screw rod located outside the main barrel.

[0014] Preferably, the arc circle is provided with a smoke exhaust assembly for collecting smoke from burning firewood, the smoke exhaust assembly comprises an air collecting hood arranged outside the arc cover, and the inner wall of the air collecting hood corresponds to the arc groove, and a smoke exhaust pipe is also provided through the arc cover.

[0015] Preferably, the gas collecting hood is also provided with several insertion grooves evenly distributed along its axis, and the several insertion grooves are staggered with the arc grooves, an insertion plate is slidably inserted in the insertion groove, a circular groove is provided in the middle of the insertion plate, and a filter plate for filtering smoke is detachably installed in the circular groove.

[0016] Preferably, the feed chute is provided with an opening and closing assembly for sealing or opening the feed chute, the opening and closing assembly comprises a receiving groove provided on the inner wall on one side of the feed chute, an arc plate is slidably provided in the receiving groove, and the other side of the arc plate is tightly attached to the inner wall on one side of the feed chute.

[0017] Preferably, a handle is also provided on the outer side of the arc-shaped plate.

[0018] Preferably, the lower end of the main barrel is also provided with an air blowing assembly for blowing air to assist combustion, and the air blowing assembly includes an air inlet groove opened on the outside of the main barrel, and an external connecting pipe is threadedly provided in the air inlet groove.

[0019] Preferably, the external connecting pipe is used to connect to an external air pumping device.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention ignites the firewood placed on the plate, and the firewood can be burned in the combustion unit at this time. At the same time, the firewood is blown by the blowing component, so that the firewood can be fully burned, and the flame and smoke generated by the burning of the firewood can enter the secondary combustion component. In the secondary combustion component, the flame and gas can be mixed and burned to increase the temperature, while maximizing the combustion temperature of the firewood.

[0021] 2. The present invention can collect and filter the remaining smoke in the secondary combustion component through the smoke exhaust component, and then discharge the filtered gas out of the device to reduce the pollution of the smoke to the environment. It can also support pot bottoms of different sizes through the support component, thereby improving the applicability of the present invention.

[0022] 3. After the present invention is used, the sleeve and the external connecting pipe can be retracted into the main barrel, and the supporting legs can be retracted to the outside of the main barrel, which is convenient for people to carry and transport, further improving the applicability and portability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the main body structure of the present invention.

[0025] Figure 2 It is a plan cross-sectional view of the combustion unit and the secondary combustion assembly of the present invention.

[0026] Figure 3 is a cross-sectional view of the combustion unit of the present invention.

[0027] Figure 4 It is a cross-sectional view of the secondary combustion assembly of the present invention.

[0028] Figure 5 It is a structural schematic diagram of the smoke exhaust component of the present invention.

[0029] Figure 6 It is a structural schematic diagram of the opening and closing assembly of the present invention.

[0030] Figure 7 It is a structural schematic diagram of the blast assembly of the present invention.

[0031] Figure 8 It is a structural schematic diagram of the support assembly of the present invention.

[0032] In the figure, 1. main barrel; 10. discharge chute; 11. sealing circular plate; 12. supporting leg; 13. feed chute; 14. sleeve; 2. combustion unit; 20. placement plate; 21. strip groove; 22. annular ring; 23. arc circle; 24. guide hole; 3. secondary combustion assembly; 30. arc cover; 31. arc groove; 32. annular groove; 33. driving circle; 34. rotating screw; 35. rotating circle; 4. smoke exhaust assembly; 40. gas collecting hood; 41. smoke exhaust pipe; 42. plug-in plate; 43. filter; 5. opening and closing assembly; 50. containing groove; 51. arc plate; 52. handle; 6. air blowing assembly; 60. air inlet groove; 61. external connecting pipe; 7. supporting assembly; 70. L-shaped plate; 71. extension plate; 72. pasting plate. DETAILED DESCRIPTION

[0033] The following combination Figures 1 to 8 Embodiments of the present invention are described in detail.

[0034] The embodiment of the present application discloses a portable circulating firewood stove, which explains that the circulating firewood stove is mainly used when it is necessary to make a fire and cook in the wild. Through the device, wood can be used to quickly make a fire and heat the food in the pot. The wood stove can also reuse the smoke generated by the firewood, increase the burning time of the firewood, and greatly reduce the consumption of firewood, thereby improving the applicability of the present invention. In particular, when carrying the wood stove, the volume of the wood stove can be reduced by telescopic means to facilitate carrying by people, further improving the applicability of the present invention.

[0035] Example 1: Reference Figure 1 and Figure 2As shown, it includes a main barrel 1, a discharge trough 10, a sealing circular plate 11, support legs 12, a feed trough 13, a combustion unit 2, a sleeve 14 and a secondary combustion assembly 3. The main barrel 1 is provided with a discharge trough 10 at the lower end, and the discharge trough 10 is internally threadedly connected with a sealing circular plate 11. The ashes of the burned firewood can fall to the lower end of the main barrel 1 through the discharge trough 10. The sealing circular plate 11 is used to seal the discharge trough 10 to prevent the ashes from being accidentally discharged from the discharge trough 10 and polluting the environment. When the ashes need to be discharged, the sealing circular plate 11 can be rotated to release the blockage of the discharge trough 10.

[0036] A supporting leg 12 is also provided at the lower end of the main barrel 1. The supporting leg 12 is an existing device that can support the main barrel 1, and when not in use, the supporting leg 12 can be folded up and attached to the outside of the main barrel 1; a feed trough 13 is provided on one side of the main barrel 1, and a combustion unit 2 for accommodating firewood and burning it is provided in the main barrel 1. Firewood is put into the combustion unit 2 through the feed trough 13, and then the firewood can be burned in the combustion unit 2.

[0037] A sleeve 14 is also slidably provided on the inner wall of the main barrel 1, with one side located at the outer end thereof. A secondary combustion component 3 for secondary recycling of the gas generated by the burning of firewood is provided in the sleeve 14. The sleeve 14 can move in the up and down directions under the limit of the inner wall of the main barrel 1, and can drive the secondary combustion component 3 to move synchronously when moving. The smoke generated by the burning of firewood can enter the secondary combustion component 3 for secondary combustion.

[0038] Continue to refer to Figure 2 and Figure 3 As shown, a combustion unit 2 is used to accommodate firewood and burn it; specifically, the combustion unit 2 includes a placement plate 20, a strip groove 21, an annular ring 22, an arc ring 23 and a guide hole 24. The placement plate 20 is arranged on the inner wall of the main barrel 1, and the placement plate 20 corresponds to the feed trough 13. The placement plate 20 is provided with a plurality of strip grooves 21 evenly distributed along its extension surface. After the firewood enters the placement plate 20 through the feed trough 13, the placement plate 20 can support the firewood, and when the firewood is burning, the ashes produced can fall to the inner wall of the lower end of the main barrel 1 through the strip groove 21 and correspond to the discharge trough 10.

[0039] An annular ring 22 is provided on the inner wall of the main barrel 1, and an arc ring 23 is provided on the annular ring 22. The arc ring 23 is provided with a plurality of guide holes 24 evenly distributed along its axis. That is, when firewood is burning, the smoke generated by the burning of firewood can enter the sleeve 14 through the guide holes 24, and the flame generated by the burning of firewood can also enter the sleeve 14 through the opening in the middle of the arc ring 23.

[0040] Continue to refer to Figure 2 and Figure 4As shown, a secondary combustion component 3 is used for secondary recycling of gas from burning firewood; specifically, the secondary combustion component 3 also includes an arc cover 30, an arc groove 31, an annular groove 32, a drive ring 33, a rotating screw 34 and a rotating ring 35. The arc cover 30 is arranged on the inner wall of the sleeve 14, and the arc cover 30 corresponds to the arc ring 23. The opening in the middle of the arc cover 30 is connected and corresponds to the opening in the middle of the arc ring 23. The opening in the middle of the arc cover 30 corresponds to the upper and lower openings of the sleeve 14, that is, the sleeve 14 can drive the arc cover 30 to move in the up and down directions, and the smoke generated when the firewood is burning can enter the arc cover 30 through the guide hole 24, and the flame when the firewood is burning can enter between the sleeve 14 and the arc cover 30 through the opening in the middle of the arc ring 23.

[0041] The inner side wall of the middle opening of the arc cover 30 is arc-shaped for accommodating the bottom of the pot. The arc cover 30 is provided with several arc grooves 31. In the initial state, the pot is placed in the middle opening of the arc cover 30. At this time, the middle opening of the arc cover 30 is blocked by the bottom of the pot, and the smoke and flame can be secondary burned under the barrier of the arc cover 30 to increase the temperature, while the remaining smoke and gas can be discharged from the arc cover 30 through the arc grooves 31.

[0042] An annular groove 32 is provided on the inner wall of the main barrel 1, and a driving ring 33 located in the annular groove 32 is provided at the lower end of the sleeve 14. The driving ring 33 can drive the sleeve 14 to move up and down in the annular groove 32; and the driving ring 33 is slidingly connected to the annular groove 32, and a rotating screw rod 34 with one end located in the annular groove 32 is rotatably penetrated on the inner wall of the main barrel 1. When the rotating screw rod 34 rotates, it can drive the driving ring 33 to move up and down in the annular groove 32 by threaded cooperation.

[0043] The rotating screw rod 34 is threadedly connected to the driving end, and a rotating ring 35 is sleeved on one end of the rotating screw rod 34 located outside the main barrel 1. That is, when in use, the support leg 12 at the lower end of the main barrel 1 is first opened, and then the main barrel 1 is placed on the ground through the support leg 12, and then the rotating ring 35 at the bottom of the main barrel 1 is rotated to drive the rotating screw rod 34 to rotate. The rotation of the rotating screw rod 34 can drive the driving ring 33 and the sleeve 14 to move up and down under the limit of the annular groove 32. Therefore, in actual use, the distance between the arc ring 23 and the arc cover 30 is adjusted according to the amount of firewood, so that enough flame and smoke in the arc ring 23 can enter the arc cover 30.

[0044] After use, the sleeve 14 is indirectly driven to be retracted into the main barrel 1 by the rotating circle 35 again. Since the inner wall of the arc cover 30 corresponds to the outer wall of the arc ring 23, after the sleeve 14 is retracted into the main barrel 1, the arc cover 30 can be attached to the outer wall of the arc ring 23, and finally the storage is completed, which is convenient for people to carry.

[0045] Reference Figure 5 As shown, a smoke exhaust assembly 4 for collecting smoke from burning firewood is provided on the arc circle 23; specifically, the smoke exhaust assembly 4 includes an air collecting hood 40, a smoke exhaust pipe 41, an insertion plate 42 and a filter 43. The air collecting hood 40 is arranged on the outer side of the arc hood 30, and the inner wall of the air collecting hood 40 corresponds to the arc groove 31. A smoke exhaust pipe 41 is also provided through the arc hood 30, that is, the remaining smoke can enter the air collecting hood 40 through the arc groove 31, and the smoke can float in the arc hood 30, and finally be discharged from the air collecting hood 40 through the smoke exhaust pipe 41.

[0046] The air collecting hood 40 is also provided with several insertion grooves evenly distributed along its axis, and several insertion grooves are staggered with the arc groove 31. An insertion plate 42 is slidably inserted in the insertion groove. A circular groove is provided in the middle of the insertion plate 42. A filter sheet 43 for filtering the flue gas is detachably installed in the circular groove. The insertion plate 42 can slide in the insertion groove, and the filter sheet 43 can perform preliminary filtering on the flue gas to reduce dust in the flue gas.

[0047] Several plug-in plates 42 isolate the arc grooves 31 from each other, and there is no arc groove 31 at the lower end of the smoke exhaust pipe 41. Therefore, in actual use, the gas exhausted from the arc groove 31 must be filtered by the filter 43, collected at the lower end of the smoke exhaust pipe 41, and finally discharged from the smoke exhaust pipe 41 to the outside of the arc cover 30, reducing the pollution of smoke to the environment; and the filter 43 needs to be replaced during long-term use, that is, at this time, the plug-in plate 42 is taken out of the plug-in groove, and then the old filter 43 is taken out of the circular groove, replaced with a new filter 43, and then the plug-in plate 42 is inserted back into the plug-in groove to complete the replacement.

[0048] Reference Figure 6As shown, an opening and closing component 5 for sealing or opening the feed trough 13 is provided in the feed trough 13; specifically, the opening and closing component 5 includes a receiving groove 50, a curved plate 51 and a handle 52, the receiving groove 50 is provided on the inner wall on one side of the feed trough 13, a curved plate 51 is slidably provided in the receiving groove 50, and the other side of the curved plate 51 is tightly attached to the inner wall on one side of the feed trough 13, that is, the curved plate 51 can slide in the receiving groove 50, and when one side of the curved plate 51 slides out of the curved groove 31 and is tightly attached to the inner wall on one side of the feed trough 13, the curved plate 51 can seal the feed trough 13, and when the curved plate 51 slides into the receiving groove 50, the blocking of the feed trough 13 can be cancelled, and at this time, the firewood can be placed on the placement plate 20 through the feed trough 13.

[0049] A handle 52 is also provided on the outer side of the arc-shaped plate 51 , and a person can use the handle 52 to drive the arc-shaped plate 51 to slide in the receiving groove 50 , so as to control the opening and closing of the feeding groove 13 by manual toggling.

[0050] Reference Figure 7 As shown, the lower end of the main barrel 1 is also provided with an air blowing assembly 6 for blowing air to assist combustion; specifically, the air blowing assembly 6 includes an air inlet groove 60 and an external connecting pipe 61. The air inlet groove 60 is opened on the outside of the main barrel 1, and the internal thread of the air inlet groove 60 is provided with an external connecting pipe 61. The external connecting pipe 61 is used to connect with an external air pumping device. The external air pumping device is a prior art. The external air pumping device can pump air toward the main barrel 1 through the external connecting pipe 61 to assist combustion of firewood. In actual use, the external connecting pipe 61 is stored in the air inlet groove 60, that is, at this time, the external connecting pipe 61 needs to be rotated so that the external connecting pipe 61 can cooperate with the thread of the air inlet groove 60, and a part of the external connecting pipe 61 will move out of the air inlet groove 60, so that it can be connected with the external air pumping device. After use, the external connecting pipe 61 is rotated in the opposite direction to drive the external connecting pipe 61 into the air inlet groove 60 to complete the storage, which is convenient for people to carry.

[0051] Through the cooperation of the air inlet groove 60, the middle opening of the arc ring 23 and the guide hole 24, the middle opening of the arc cover 30 and the arc groove 31, and the smoke exhaust pipe 41, the gas can circulate in the device, creating a good combustion environment for the firewood, driving the firewood to burn fully, and allowing the flame and gas of the burning firewood to enter the arc cover 30.

[0052] Example 2: Reference Figure 8As shown, on the basis of the first embodiment, in order to be able to adapt and support pot bottoms of various sizes, a support assembly 7 is provided on the outside of the arc cover 30; specifically, the support assembly 7 includes an L-shaped plate 70, an extension plate 71 and a pasting plate 72, and several L-shaped plates 70 are hinged on the outside of the arc cover 30, and several L-shaped plates 70 are evenly distributed along the axis of the arc cover 30, that is, the L-shaped plate 70 can swing along its hinge point on the arc cover 30.

[0053] An extension plate 71 is slidably inserted into the end of the L-shaped plate 70, and the extension plate 71 can slide on the end of the L-shaped plate 70 to increase the length of the end of the L-shaped plate 70; a sticking plate 72 corresponding to the inner wall of the upper opening of the arc cover 30 is also provided on one side of the L-shaped plate 70, and the sticking plate 72 is used to be attached to the inner wall of the arc cover 30 to indirectly support the L-shaped plate 70.

[0054] During use, the L-shaped plate 70 is first swung over, and then the length of the extension plate 71 at the end of the L-shaped plate 70 is pulled according to the diameter length of the pot bottom, and then the pot bottom is placed on the extension plate 71, and the pot bottom is supported by the extension plate 71, so as to achieve the purpose of adapting to pot bottoms of different sizes, further improving the applicability of the present invention.

[0055] During operation: the first step is to open the support legs 12 and place the main barrel 1 on the ground through the support legs 12, and then drive the sleeve 14 to extend out of the main barrel 1 through the rotating screw 34 in the secondary combustion assembly 3, and then place the pot in the opening in the middle of the arc cover 30.

[0056] Step 2: Then manually move the arc plate 51 in the receiving groove 50 to cancel the blockage of the feeding groove 13, and then the firewood can be put into the placement plate 20 through the feeding groove 13.

[0057] The third step: ignite the firewood on the placement plate 20. The firewood can now be burned in the combustion unit 2. At the same time, the firewood is blown by the blower assembly 6 so that the firewood can be fully burned. The flame and smoke generated by the burning of the firewood can enter the secondary combustion assembly 3. In the secondary combustion assembly 3, the flame and gas can be mixed and burned to increase the temperature, while maximizing the combustion temperature of the firewood.

[0058] Step 4: The remaining smoke in the secondary combustion component 3 can be collected and filtered through the smoke exhaust component 4, and then the filtered gas is discharged out of the device to reduce the pollution of the smoke to the environment. The support component 7 can also support the bottoms of pots of different sizes, thereby improving the applicability of the present invention.

[0059] Step 5: After use, the sleeve 14 and the external connecting pipe 61 can be retracted into the main barrel 1, and the supporting legs 12 can be retracted to the outside of the main barrel 1, which is convenient for people to carry and transport, further improving the applicability and portability of the present invention.

[0060] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0061] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A portable circulating firewood stove, comprising a main barrel (1), characterized in that: The main barrel (1) is provided with a discharge chute (10) at the lower end, a sealing circular plate (11) is connected to the discharge chute (10) through an internal thread, a supporting leg (12) is also provided at the lower end of the main barrel (1), a feed chute (13) is provided at one side of the main barrel (1), a combustion unit (2) for accommodating firewood and causing it to burn is provided in the main barrel (1), a sleeve (14) is also slidably provided on the inner wall of the main barrel (1) and is located at the outer end thereof, and a secondary combustion component (3) for secondary recycling of the gas generated by the burning of the firewood is provided in the sleeve (14); The combustion unit (2) comprises a placement plate (20) arranged on the inner wall of the main barrel (1), and the placement plate (20) corresponds to the feed trough (13), and the placement plate (20) is provided with a plurality of strip grooves (21) evenly distributed along its extended surface.

2. A portable circulating firewood stove according to claim 1, characterized in that: The combustion unit (2) further comprises an annular ring (22) arranged on the inner wall of the main barrel (1), an arc ring (23) being arranged on the annular ring (22), and a plurality of guide holes (24) evenly distributed along the axis of the arc ring (23) being opened on the arc ring (23).

3. A portable circulating firewood stove according to claim 2, characterized in that: The secondary combustion assembly (3) further comprises an arc-shaped cover (30) arranged on the inner wall of the sleeve (14), and the arc-shaped cover (30) corresponds to the arc-shaped ring (23), the opening in the middle of the arc-shaped cover (30) is connected and corresponds to the opening in the middle of the arc-shaped ring (23), the opening in the middle of the arc-shaped cover (30) corresponds to the upper and lower openings of the sleeve (14), and the inner side wall of the opening in the middle of the arc-shaped cover (30) is arc-shaped for accommodating the bottom of the pot, and a plurality of arc-shaped grooves (31) are provided on the arc-shaped cover (30).

4. A portable circulating firewood stove according to claim 1, characterized in that: The main barrel (1) is provided with an annular groove (32) on its inner wall, a driving ring (33) located in the annular groove (32) is provided at the lower end of the sleeve (14), and the driving ring (33) is slidably connected to the annular groove (32), a rotating screw (34) is rotatably penetrated through the inner wall of the main barrel (1), one end of the rotating screw (34) being located in the annular groove (32), and the rotating screw (34) is threadedly connected to the driving end, and a rotating ring (35) is sleeved on the end of the rotating screw (34) located outside the main barrel (1).

5. A portable circulating firewood stove according to claim 2, characterized in that: The arc-shaped ring (23) is provided with a smoke exhaust assembly (4) for collecting smoke from burning firewood. The smoke exhaust assembly (4) comprises an air collecting hood (40) arranged outside the arc-shaped hood (30), and the inner wall of the air collecting hood (40) corresponds to the arc-shaped groove (31). A smoke exhaust pipe (41) is also provided through the arc-shaped hood (30).

6. A portable circulating firewood stove according to claim 5, characterized in that: The gas collecting hood (40) is also provided with a plurality of insertion grooves evenly distributed along its axis, and the plurality of insertion grooves are staggered with the arc-shaped grooves (31), an insertion plate (42) is slidably inserted in the insertion groove, a circular groove is provided in the middle of the insertion plate (42), and a filter sheet (43) for filtering smoke is detachably installed in the circular groove.

7. A portable circulating firewood stove according to claim 1, characterized in that: An opening and closing assembly (5) for closing or opening the feed trough (13) is arranged in the feed trough (13), and the opening and closing assembly (5) comprises a receiving groove (50) arranged on the inner wall of one side of the feed trough (13), and an arc plate (51) is slidably arranged in the receiving groove (50), and the other side of the arc plate (51) is tightly attached to the inner wall of one side of the feed trough (13).

8. A portable circulating firewood stove according to claim 7, characterized in that: A handle (52) is also provided on the outer side of the arc-shaped plate (51).

9. A portable circulating firewood stove according to claim 1, characterized in that: The lower end of the main barrel (1) is also provided with an air blowing assembly (6) for blowing air to assist combustion. The air blowing assembly (6) comprises an air inlet groove (60) provided on the outside of the main barrel (1). The air inlet groove (60) is provided with an external connecting pipe (61) in the form of an internal thread.

10. A portable circulating firewood stove according to claim 9, characterized in that: The external connecting pipe (61) is used to connect to external air pumping equipment.

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