Secondary combustion device for square tube chimney of firewood stove

Abstract

The utility model provides a secondary combustion device for a square tube chimney of a firewood stove, which comprises a square tube chimney main body, a rectangular outer sleeve, an air inlet oxygen supply hole, a concentric shaft, a concentric shaft hole, an external fire source ignition hole, an external fire source ignition hole screw thread pipe and a sliding guide support strip. Smoke carbon particle combustible smoke generated by incomplete combustion is subjected to secondary air inlet oxygen supply, secondary ignition and secondary combustion in the chimney of the firewood furnace, and the purposes of saving energy, reducing emission and improving combustion efficiency are achieved. After the secondary combustion device for the chimney flue gas of the square tube furnace of the firewood furnace is mounted on the firewood furnace, ignition and combustion are carried out, the air inlet oxygen supply hole in the square tube chimney main body sucks air through the suction force of flame hot airflow in the chimney to supply oxygen for the second time in the chimney, and the mixed flame flue gas hot airflow is subjected to secondary combustion; and whether the external fire source is ignited to assist combustion or not can be selected according to the current combustion condition and use environment of the firewood stove by the external fire source mounted on the secondary ignition hole threaded pipe.

Description

Technical Field

[0001] The utility model discloses a secondary combustion device for a square tube chimney of a wood-fired stove, and relates to the technical field of secondary combustion in a chimney of smoke discharged into the chimney due to insufficient oxygen supply and incomplete combustion of a wood-fired stove. Background Art

[0002] The wood stoves currently on the market, including wood stove chimneys for indoor fire, cooking, tent camping heating, fire watching, self-driving tours, outdoor fishing, picnics, leisure and entertainment, have no design for secondary oxygen supply, secondary ignition, and secondary combustion of the flue gas in the chimney. The fire outlet of the wood stove chimney is at the end of the air inlet and oxygen supply. Due to insufficient oxygen supply and incomplete combustion, unburned flue gas carbon particles and sparks are directly discharged from the chimney, which is not conducive to environmental protection. The carbon deposits generated over time will also block the chimney. Flue gas carbon particles are combustible energy, which not only wastes fuel but is also detrimental to the air environment. It fails to achieve energy conservation and emission reduction, and is not green or environmentally friendly. Summary of the Invention

[0003] The utility model provides a square tube chimney secondary combustion device for a wood stove with a simple structure, easy manufacturing, fuel saving, and improved combustion efficiency. The device comprises a square tube chimney body, a rectangular outer sleeve, an air inlet and oxygen supply hole, a concentric shaft, a concentric shaft hole, a sliding guide support bar, an external fire source ignition hole, and a threaded tube for the external fire source ignition hole.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions

[0005] A secondary combustion device for a square tube chimney of a wood-fired stove comprises a square tube chimney body, a rectangular outer sleeve, and air inlet and oxygen supply holes. The device is characterized in that the rectangular outer sleeve is sleeved on the square tube chimney body and is provided with corresponding air inlet and oxygen supply holes and concentric axis holes. The concentric axis passes through the concentric axis holes on the D and B tube surfaces of the square tube chimney body from the concentric axis hole on the H tube surface of the rectangular outer sleeve and is fixed on the concentric axis hole on the F tube surface of the rectangular outer sleeve. The rectangular outer sleeve has a movable position on the square tube chimney body that can be pushed and pulled left and right.

[0006] As a preferred solution: the square tube chimney body A, B, and C tube surfaces each have a row of air inlet and oxygen supply holes, wherein the central hole of the B tube surface is a concentric axis hole, the D tube surface has a concentric axis hole symmetrical to the concentric axis hole of the B tube surface, a secondary ignition hole is provided in the center of the upper part of the concentric axis hole, a secondary ignition hole threaded tube is welded and installed on the secondary ignition hole, and the A and C tube surfaces are welded and installed with sliding guide bars that support the rectangular outer sleeve to move left and right.

[0007] As a preferred solution: the rectangular outer sleeve is movably installed on the square tube chimney body, and its E and G tube surfaces are each provided with a row of air inlet and oxygen supply holes corresponding to the A and C tube surfaces of the square tube chimney body, and the center of the F and H tube surfaces is each provided with a concentric axis hole with the same center as the B and D tube surfaces of the square tube chimney body. The size of the air inlet and oxygen supply holes can be highlighted by pushing and pulling the rectangular outer sleeve left and right, and the switch can be adjusted.

[0008] The beneficial effects of the present invention are as follows: the fire outlet of the chimney of the wood stove is at the very end of the air inlet and oxygen supply, and smoke carbon particles will be generated due to insufficient oxygen supply, and will enter the chimney along with the hot air flow of the flame. Over time, carbon deposits will be generated to block the chimney. The smoke carbon particles are combustible energy, which not only wastes fuel but also is detrimental to the air environment. The working principle and working process of the secondary combustion device of the square tube chimney of the wood stove of the present invention are to use the suction force of the hot air flow of the flame in the chimney to inhale air from the air inlet and oxygen supply hole to supply air and oxygen, and the mixed hot air flow of the flame will secondary burn out the smoke carbon particles in the chimney. According to the combustion state of the wood stove, the rectangular outer sleeve is pushed and pulled left and right to realize the opening and closing of the secondary air inlet and oxygen supply in the chimney; it is selected whether the external fire source enables secondary ignition auxiliary combustion; it is used to save fuel, increase thermal efficiency, and improve combustion effect, and no carbon deposits will be generated to block the chimney. The external fire source is particularly suitable for using a wood stove for heating at home, and the smoke will not affect the upstairs residents when watching the fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 : 3D image of secondary combustion device of square tube chimney of wood stove

[0010] Figure 2 : Side view of the secondary combustion device of the square tube chimney of the wood stove

[0011] Figure 3 : 3D view of the rectangular outer casing of the square tube chimney secondary combustion device of the wood stove

[0012] Figure 4 :Top view of secondary combustion device of square tube chimney of wood stove DETAILED DESCRIPTION

[0013] like Figures 1 to 4 As shown, an embodiment of the present invention, the utility model square tube chimney secondary combustion device of the wood burning stove comprises a square tube chimney body 1, a rectangular outer sleeve 2, an air inlet and oxygen supply hole 3, a concentric axis 4, a concentric axis hole 5, a sliding guide bar 6, a secondary ignition hole 7, and a secondary ignition hole threaded tube 8. The rectangular outer sleeve 2 is installed on the square tube chimney body 1 in a sleeve-type manner, and has corresponding air inlet and oxygen supply holes 3 and concentric axis holes 5. The concentric axis 4 passes through the square tube chimney body 1 from the concentric axis hole 5 on the H tube surface of the rectangular outer sleeve 2 and is fixed on the concentric axis hole 4 on the F tube surface of the rectangular outer sleeve 2. The rectangular outer sleeve 2 has a movable position for pushing and pulling left and right on the square tube chimney body 1, and the movable distance is twice the aperture of the air inlet and oxygen supply hole 3.

[0014] The square tube chimney body 1 is a square tube chimney that can be plugged into and connected to an extended chimney. The square tube surfaces are A, B, C, and D tube surfaces in sequence. Air inlet and oxygen supply holes 3 and concentric axis holes 5 are opened on the same horizontal ring line. Among them, the A, B, and C tube surfaces each have a row of identical air inlet and oxygen supply holes 3, and the hole spacing is twice the diameter of the air inlet and oxygen supply holes 3. The hole in the middle of the B tube surface is a concentric axis hole 5, and a symmetrical concentric axis hole 5 is opened in the middle of the D tube surface, which is the same as the B tube surface. On the A and C tube surfaces of the square tube chimney body 1, the pipe openings of the rectangular outer sleeve 2 are welded and installed to support the rectangular outer sleeve 2. The sliding guide bar 6 guides the rectangular outer sleeve 2 to push and pull and slide left and right. A secondary ignition hole 7 is opened on the square tube chimney body 1. The secondary ignition hole 7 is welded and installed with a secondary ignition hole threaded tube 8, and an external fire source for secondary ignition is connected and installed. The external fire source is a small flamethrower-like device. According to the combustion situation of the wood stove, it is selected whether to enable the external fire source to assist combustion, to save fuel, increase thermal efficiency, and improve the combustion effect, and no carbon deposits will be generated to block the chimney. The external fire source is particularly suitable for using a wood stove for heating and watching the fire at home without affecting the upstairs residents because of the smoke.

[0015] The rectangular outer sleeve 2 is a rectangular steel tube that is movably mounted on the square tube chimney body 1 and can be moved left and right to open and close the air inlet and oxygen supply hole 3. Its width is just larger than the square tube chimney body 1, and its length is the width of the square tube chimney body 1 plus twice the aperture of the air inlet and oxygen supply hole 3. The tube surfaces of the rectangular outer sleeve 2 are E, F, G, and H, respectively, wherein the hole position and aperture of the air inlet and oxygen supply hole 3 opened on the E and G tube surfaces are the same as the hole position and aperture of the air inlet and oxygen supply hole 3 on the A and C tube surfaces of the square tube chimney body 1, and the concentric axis hole 5 opened on the F and H tube surfaces of the rectangular outer sleeve 2 is the same as the hole position of the concentric axis hole 5 on the B and D tube surfaces of the square tube chimney body 1. , the aperture is the same, and the rectangular outer sleeve 2 is pushed and pulled left and right to move. When the H tube surface of the rectangular outer sleeve 2 is in contact with the D tube surface of the square tube chimney body 1, the air inlet and oxygen supply holes 2 opened on the E and G tube surfaces of the rectangular outer sleeve 2 are the same as and communicate with the air inlet and oxygen supply holes 3 on the A and C tube surfaces of the square tube chimney body 1, and the air inlet and oxygen supply holes 3 are opened, and the air inlet and oxygen supply, when the rectangular outer sleeve 2 is pushed to make the F tube surface in contact with the B tube surface of the square tube chimney body 1, the air inlet and oxygen supply holes 3 on the A, B and C tube surfaces of the square tube chimney body 1 are closed. The F and H tube surfaces of the rectangular outer sleeve 2 are consistent with the concentric axis holes 5 opened on the B and D tube surfaces of the square tube chimney body 1, and are concentric axis holes 4 with a concentric axis 4 passing through.

Claims

1. A secondary combustion device for a square tube chimney of a wood-fired stove, comprising a square tube chimney body, a rectangular outer casing, and an air inlet and oxygen supply hole, characterized in that: The rectangular outer sleeve is sleeved on the square tube chimney body, and is provided with corresponding air inlet and oxygen supply holes and concentric axis holes. The concentric axis passes through the concentric axis holes on the D and B tube surfaces of the square tube chimney body from the concentric axis hole on the H tube surface of the rectangular outer sleeve, and is fixed on the concentric axis hole on the F tube surface of the rectangular outer sleeve. The rectangular outer sleeve has a movable position for pushing and pulling left and right on the square tube chimney body.

2. The square tube chimney secondary combustion device for a wood-fired stove according to claim 1, characterized in that: The square tube chimney body A, B, and C tube surfaces each have a row of air inlet and oxygen supply holes, wherein the central hole of the B tube surface is a concentric axis hole, and the D tube surface has a concentric axis hole symmetrical to the concentric axis hole of the B tube surface. A secondary ignition hole is provided in the center of the upper part of the concentric axis hole, and a secondary ignition hole threaded tube is welded and installed on the secondary ignition hole. The A and C tube surfaces are welded and installed with sliding guide bars that support the rectangular outer sleeve to move left and right.

3. The square tube chimney secondary combustion device for a wood-fired stove according to claim 1, characterized in that: The rectangular outer sleeve is movably installed on the square tube chimney body, and its E and G tube surfaces are each provided with a row of air inlet and oxygen supply holes corresponding to the A and C tube surfaces of the square tube chimney body, and the F and H tube surfaces are each provided with a concentric axis hole that is symmetrical with the B and D tube surfaces of the square tube chimney body. The size and switch of the air inlet and oxygen supply holes can be adjusted by pushing and pulling the rectangular outer sleeve left and right.

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