Low-temperature combustion tube, combustor and oven

Abstract

The utility model discloses a low-temperature combustion tube, a combustor and an oven. The low-temperature combustion tube comprises a tubular combustion tube body, a first fire outlet hole group and a plurality of second fire outlet hole groups are formed in the upward side wall of the combustion tube body; the first fire outlet hole group is used for arranging and discharging fire in the length direction of the combustion tube body; the second fire outlet hole sets are arranged at intervals in the length direction of the combustion tube body so that an airflow area can be formed between every two adjacent second fire outlet hole sets, and the second fire outlet hole sets are used for conducting arrangement fire outlet in the width direction of the combustion tube body. By the adoption of the scheme, fire is emitted in the length direction of the combustion tube body through the first fire outlet hole set, fire outlet covering in the width direction is achieved with the assistance of the multiple second fire outlet hole sets arranged at intervals, and effective air supply and heat dissipation of the first fire outlet hole set and the second fire outlet hole sets can be achieved under the arrangement of the airflow area; according to the low-temperature combustion tube, the combustor and the oven, combustion is complete, and the temperature of the combustion tube body is lower.

Description

Technical Field

[0001] The utility model belongs to the field of burners, and in particular relates to a low-temperature combustion tube, a burner and a baking oven. Background Art

[0002] A burner is a device that uses gas as energy to burn and provide heat.

[0003] There are two main types of traditional tubular burners:

[0004] The first is a double-row arrangement of fire holes, that is, two rows of fire holes are arranged along the length of the combustion tube at the top of the combustion tube. This arrangement achieves a larger fire area, thereby heating the air relatively evenly. However, in the combustion state, it is difficult for the two rows of fire holes to contact the air, which can easily cause incomplete combustion and generate harmful gases. Local high temperature will also be generated between the two rows of fire holes, causing the temperature of the combustion tube part between the two rows of fire holes to be too high and oxidized and burned, seriously shortening the life of the combustion tube.

[0005] The second type is a single-row arrangement of fire holes, that is, a single row of fire holes is arranged along the length of the combustion tube at the top of the combustion tube. This arrangement makes it easy for the fire holes to come into contact with the air and burn completely, and will not cause local high temperatures in the combustion tube to burn. However, the space for arranging the fire holes is limited, the fire holes are concentrated in a line, and the temperature is uneven. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a low-temperature combustion tube, burner and oven that can emit fire in the length direction of the combustion tube body through a first fire hole group, and then assisted by multiple groups of second fire hole groups arranged at intervals to achieve fire coverage in the width direction, and under the setting of the airflow area, effective air supply and heat dissipation can be achieved for the first fire hole group and each second fire hole group, so that the combustion is complete and the temperature of the combustion tube body is lower.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A low-temperature combustion tube, characterized in that it includes a tubular combustion tube body; a group of first fire hole groups and multiple groups of second fire hole groups are provided on the upward side wall of the combustion tube body; the first fire hole groups are used to arrange and emit fire in the length direction of the combustion tube body; each second fire hole group is arranged at intervals along the length direction of the combustion tube body so that airflow areas are formed between adjacent second fire hole groups, and the second fire hole groups are used to arrange and emit fire in the width direction of the combustion tube body.

[0009] The present invention is further configured as follows: at least one group of the second fire hole groups includes a first part and a second part located on both sides of the first fire hole group; and / or at least two groups of the second fire hole groups are located on both sides of the first fire hole group.

[0010] The present invention is further configured as follows: the upward side wall of the combustion tube body is formed as an arc surface that bends downward on both sides of the width or an inclined surface that tilts downward; the first fire hole group is arranged at the top of the combustion tube body and extends along the length direction of the combustion tube body; the second fire hole group extends along the bending direction of the arc surface of the combustion tube body or the inclined direction of the inclined surface.

[0011] The present invention is further configured such that: the orientation of each fire hole of the first fire hole group is perpendicular to the cross-section of the side wall of the combustion tube body, or the orientation of each fire hole of the first fire hole group is upward; and / or the orientation of each fire hole of the second fire hole group is perpendicular to the cross-section of the side wall of the combustion tube body.

[0012] The present invention is further configured as follows: the outer circumference of the combustion tube body is cylindrical; the arc range covered by the second fire hole group on one side of the first fire hole group is s1, π / 8≤s1≤3π / 4; and / or, the arc range covered by the second fire hole group is s2, π / 4≤s2≤3π / 2.

[0013] The present invention is further configured as follows: an included angle α between an extension direction of the first ignition hole group and an extension direction of the second ignition hole group is 30°≤α≤90°.

[0014] The present invention is further configured as follows: the spacing between two adjacent groups of the second fire hole groups is s, 1cm≤s≤3cm; and / or the spacing between adjacent fire holes in the first fire hole group and / or the spacing between adjacent fire holes in the second fire hole group is k, and the spacing between two adjacent groups of the second fire hole groups is s, 5k≤s≤10k.

[0015] The present invention is further configured such that: the first fire outlet groups are arranged in a straight line or in a wave shape.

[0016] A burner, characterized by comprising the above-mentioned low-temperature combustion tube.

[0017] A baking oven, characterized by comprising the burner mentioned above.

[0018] By adopting the above technical solution, the following advantages are achieved:

[0019] 1. The first fire hole group arranges the fire holes along the length direction of the combustion tube body so that each fire hole emits fire in the front-to-back direction, and the arrangement of the fire holes is closely arranged, thereby effectively providing heating in the front-to-back direction. The second fire hole group arranges the fire holes along the outer peripheral arc surface of the combustion tube body so that each fire hole emits fire in the left-to-right direction, and the arrangement of the fire holes is closely arranged, thereby effectively providing heating in the left-to-right direction. In addition, multiple groups of second fire hole groups are arranged along the front-to-back direction so that each group of second fire hole groups heats in the left-to-right direction at different front-to-back positions. The first fire hole group and the second fire hole group comprehensively achieve a large fire area to heat the air more evenly.

[0020] 2. Due to the existence of the airflow area formed by the spacing arrangement of the second fire hole group, only a few fire holes on the first fire hole group are opposite to the second fire hole group on the left and right sides, while the left and right sides of the vast majority of the fire holes correspond to the airflow area. Therefore, during combustion, the fire holes heat the air, causing the air above the fire holes to rise and the air pressure to decrease, which will cause the air on both sides of the combustion tube body to enter the airflow area and approach the first fire hole group to supplement air and ensure complete combustion. Similarly, the front and rear sides of the fire holes on the second fire hole group face one or two airflow areas. Therefore, during combustion, the fire holes heat the air, causing the air above the fire holes to rise and the air pressure to decrease, which will cause the air on both sides of the combustion tube body to enter the airflow area and approach the second fire hole group to supplement air and ensure complete combustion, thereby preventing the generation of harmful gases.

[0021] 3. Due to the flow of air in the airflow area, the heat flow diffuses, that is, the combustion heat retained in the combustion tube body is less, and the combustion tube body is kept at a low temperature, preventing the combustion tube body from burning due to excessive temperature, thereby increasing the service life.

[0022] 4. Since the second fire hole groups are arranged in the front-to-back direction, the spacing between the second fire hole groups is ensured by utilizing the long front-to-back length of the combustion tube body, thereby preventing insufficient air flow in the airflow area and incomplete combustion due to too small a spacing, as well as slow heat diffusion and heating of the combustion tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the first embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the first embodiment of the present utility model;

[0026] Figure 3 A top view of the first embodiment of the present invention;

[0027] Figure 4 This is a cross-sectional view of the first embodiment of the present utility model;

[0028] Figure 5 for Figure 4 A magnified view of middle A;

[0029] Figure 6 This is a cross-sectional view of the first embodiment of the present utility model;

[0030] Figure 7 This is a top view of the third embodiment of the present utility model;

[0031] Figure 8 This is a top view of the fourth embodiment of the present invention.

[0032] Explanation of the reference numerals: 1. combustion tube body; 2. first fire outlet hole group; 3. second fire outlet hole group; 31. first portion; 32. second portion; 33. first hole group; 34. second hole group; 4. airflow area. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present invention and thus more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention. The specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of implementation of the present invention. The conventional selections and replacements made by those skilled in the art under the guidance of the present invention should be deemed to be within the scope of protection claimed by the present invention.

[0034] Example 1:

[0035] like Figures 1-6 As shown, the utility model discloses a low-temperature combustion tube, including a combustion tube body 1 in a cylindrical tube shape, wherein the axial direction of the combustion tube body 1 is along the front-to-back direction, and a fire hole is set on the upward side wall of the combustion tube body 1, so that the gas is ejected from the fire hole and burns to generate flames for heating.

[0036] Specifically, a group of first fire hole groups 2 and multiple groups of second fire hole groups 3 are provided on the upward side wall of the combustion tube body 1; wherein, the first fire hole group 2 is composed of a plurality of fire holes arranged at intervals along the front-to-back direction, so that the first fire hole group 2 is arranged and emits fire in the length direction of the combustion tube body 1; wherein, each second fire hole group 3 is arranged at intervals along the front-to-back direction so that an airflow area 4 is formed between adjacent second fire hole groups 3, and in addition, the second fire hole group 3 is composed of a plurality of fire holes arranged at intervals along the arc surface extension direction of the combustion tube body 1, so that the second fire holes are arranged and emit fire in the width direction of the combustion tube body 1.

[0037] Therefore, 1. The first fire hole group 2 arranges the fire holes along the length direction of the combustion tube body 1 so that each fire hole can emit fire in the front-to-back direction, and the arrangement of the fire holes is closely arranged, thereby effectively providing heating in the front-to-back direction. The second fire hole group 3 arranges the fire holes along the outer peripheral arc surface of the combustion tube body 1 so that each fire hole can emit fire in the left-to-right direction, and the arrangement of the fire holes is closely arranged, thereby effectively providing heating in the left-to-right direction. In addition, multiple groups of second fire hole groups 3 are arranged along the front-to-back direction to make Each group of second fire hole groups 3 performs left-right heating at different positions in the front and back directions. The first fire hole group 2 and the second fire hole group 3 achieve a large fire area to heat the air more evenly. 2. Due to the existence of the airflow area 4 formed by the spacing of the second fire hole groups 3, only a few fire holes on the first fire hole group 2 are opposite to the second fire hole group 3 on the left and right sides, while the left and right sides of the vast majority of the fire holes correspond to the airflow area 4. Therefore, during combustion, the air above the fire hole rises due to the fire hole heating the air, and the air pressure is increased. 3. The flow of air in the airflow regions 4 is combined with the diffusion of heat, which means that less heat is retained in the burner body 1. This keeps the burner body 1 at a low temperature, preventing oxidation and burning due to excessive temperature, thereby improving its service life. 4. The second fire hole groups 3 are arranged in a front-to-back direction, utilizing the longer front-to-back length of the burner body 1 to ensure spacing between the second fire hole groups 3. This prevents insufficient air flow in the airflow regions 4, which results in incomplete combustion, and slow heat diffusion, which would otherwise heat the burner body 1.

[0038] Preferably, the second fire hole group 3 in this embodiment includes a first portion 31 located on the left side of the first fire hole group 2 and a second portion 32 located on the right side.

[0039] Therefore, the air on the left side of the first fire hole group 2 is heated by the first part 31, and the first parts 31 of each group of second fire hole groups 3 are combined to achieve more evenly heated air on the left side of the first fire hole group 2. Similarly, the air on the right side of the first fire hole group 2 is heated by the second part 32, and the second parts 32 of each group of second fire hole groups 3 are combined to achieve more evenly heated air on the right side of the first fire hole group 2.

[0040] Among them, since the combustion tube body 1 is a cylindrical tube, the upward side wall of the combustion tube body 1 is an arc surface that bends downward toward the left and right sides, and the first fire hole group 2 is arranged at the top of the combustion tube body 1, and the second fire hole group 3 extends along the bending direction of the arc surface of the combustion tube body 1.

[0041] In other embodiments, a triangular prism shape may be adopted so that the upward side walls of the combustion tube body 1 are arranged as inclined surfaces that are inclined toward the left and right sides and downward.

[0042] Preferably, the orientation of each fire hole of the first fire hole group 2 is perpendicular to the cross-section of the side wall of the combustion tube body 1, and at the same time, the orientation of each fire hole of the first fire hole group 2 is set upward, so that when the combustion tube body 1 is placed flat, the fire holes of the first fire hole group 2 are punched downward, which is more convenient to process, and the flame straightness is better, and it is not easy for the flame to contact the combustion tube body 1 and cause the combustion tube body 1 to heat up.

[0043] In other embodiments, if the combustion tube body 1 is tilted to a certain extent, the orientation of each fire hole of the first fire hole group 2 can also be perpendicular to the cross-section of the side wall of the combustion tube body 1, so that the processing is more convenient, or the orientation of each fire hole of the first fire hole group 2 is set upward, so that the fire direction is upward and the flame straightness is better.

[0044] Preferably, each fire hole of each second fire hole group 3 is oriented perpendicular to the cross section of the side wall of the combustion tube body 1, which makes processing more convenient and allows the flame generated by the combustion of the cylindrical tubular combustion tube body 1 to spread outward to increase the fire area.

[0045] Preferably, the arc range covered by the second fire hole group 3 on one side of the first fire hole group 2 is s1, π / 8≤s1≤3π / 4; at the same time, the arc range covered by the second fire hole group 3 is s2, π / 4≤s2≤3π / 2, so as to achieve coverage of a larger arc to increase the fire area.

[0046] The angle between the extension direction of the first fire hole group 2 and the extension direction of the second fire hole group 3 is α, and 30°≤α≤90°. That is, the first fire hole group 2 and the second fire hole group 3 can have a certain angle. Specifically, the first fire hole group 2 can be deflected to the left and right, and the second fire hole group 3 can be deflected to the front and back. In this embodiment, the angle between the two is 90°, which makes the structure more orderly and the temperature at each position more uniform.

[0047] Preferably, the spacing between two adjacent second fire hole groups 3 is s, with 1cm≤s≤3cm; the spacing between adjacent fire holes in the first fire hole group 2 and / or the spacing between adjacent fire holes in the second fire hole group 3 is k, and the spacing between two adjacent second fire hole groups 3 is s, with 5k≤s≤10k. Using appropriate spacing ensures more uniform heating while effectively dissipating heat and preventing the combustion tube body 1 from overheating.

[0048] Among them, the fire holes of the first fire hole group 2 in this embodiment are arranged in a straight line, and the structure is simpler.

[0049] In other embodiments, the combustion tube body 1 may be a U-shaped tube, a corrugated tube, etc.

[0050] In other embodiments, the combustion tube body 1 may be a semi-cylindrical tube or other structure with an arc-shaped upper surface, which has the same effect as the combustion tube body 1 in a cylindrical tube shape.

[0051] Example 2:

[0052] The utility model discloses a low-temperature combustion tube, whose main structure is the same as that of the first embodiment, except that the combustion tube body 1 is in a square tube shape, so that the upward side wall of the combustion tube body 1 is flat.

[0053] Example 3:

[0054] like Figure 7 As shown, the utility model discloses a low-temperature combustion tube, whose main structure is the same as that of the first embodiment, except that the fire holes of the same second fire hole group 3 are arranged on the same side of the first fire hole group 2, that is, the second fire hole group 3 is divided into a first hole group 33 arranged on the left side of the first fire hole group 2 and a second hole group 34 on the right side.

[0055] The first hole group 33 heats the air on the left side of the first fire hole group 2 , and the multiple first hole groups 33 arranged in front and behind each other can achieve more uniform heating of the air on the left side of the first fire hole group 2 .

[0056] Similarly, the second hole group 34 heats the air on the right side of the first fire hole group 2 , and the multiple second hole groups 34 arranged in front and behind each other ensure that the air on the right side of the first fire hole group 2 is heated more evenly.

[0057] Example 4:

[0058] like Figure 8 As shown, the present invention discloses a low-temperature combustion tube, the main structure of which is the same as that of the first embodiment, except that the fire holes of the first fire hole group 2 are arranged in a wave shape.

[0059] Therefore, the first fire hole group 2 arranged in a wave shape can cover a larger range in the left and right directions, further improving the uniformity of heating.

[0060] Embodiment 5:

[0061] The utility model discloses a burner, comprising a low-temperature combustion tube according to any one of the first to fourth embodiments.

[0062] This makes the burner burn more completely, have a longer life, and heat more evenly.

[0063] Example 6:

[0064] The utility model discloses a baking oven, comprising the burner of the fifth embodiment.

[0065] This makes the oven burn more completely, last longer, and heat more evenly.

[0066] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-temperature combustion tube, characterized in that: It comprises a tubular combustion tube body (1); A first fire outlet group (2) and a plurality of second fire outlet groups (3) are provided on the upward side wall of the combustion tube body (1); the first fire outlet group (2) is used to arrange fire in the length direction of the combustion tube body (1); The second fire hole groups (3) are arranged at intervals along the length direction of the combustion tube body (1) so that an airflow area (4) is formed between adjacent second fire hole groups (3). The second fire hole groups (3) are used to arrange and emit fire in the width direction of the combustion tube body (1).

2. The low-temperature combustion tube according to claim 1, characterized in that: At least one of the second fire hole groups (3) comprises a first portion (31) and a second portion (32) located on both sides of the first fire hole group (2); and / or, At least two groups of the second fire outlet holes (3) are located on both sides of the first fire outlet hole group (2).

3. The low-temperature combustion tube according to claim 1, characterized in that: The upward side wall of the combustion tube body (1) is provided in the form of an arc surface that bends downwards towards both sides of the width or an inclined surface that tilts downwards; The first fire outlet group (2) is arranged at the top of the combustion tube body (1) and extends along the length direction of the combustion tube body (1); The second fire outlet hole group (3) is extended along the bending direction of the arc surface or the inclination direction of the inclined surface of the combustion tube body (1).

4. The low-temperature combustion tube according to claim 3, characterized in that: The orientation of each fire hole of the first fire hole group (2) is perpendicular to the cross section of the side wall of the combustion tube body (1), or the orientation of each fire hole of the first fire hole group (2) is upward; and / or, The orientation of each fire outlet hole of each second fire outlet hole group (3) is perpendicular to the cross section of the side wall of the combustion tube body (1).

5. The low-temperature combustion tube according to claim 3, characterized in that: The outer periphery of the combustion tube body (1) is cylindrical; the arc range covered by the second fire hole group (3) on one side of the first fire hole group (2) is s1, π / 8≤s1≤3π / 4; and / or, The arc range covered by the second fire hole group (3) is s2, π / 4≤s2≤3π / 2.

6. The low-temperature combustion tube according to claim 1, characterized in that: The included angle between the extension direction of the first fire outlet hole group (2) and the extension direction of the second fire outlet hole group (3) is α, and 30°≤α≤90°.

7. The low-temperature combustion tube according to claim 1, characterized in that: The distance between two adjacent groups of the second fire outlet holes (3) is s, 1cm≤s≤3cm; and / or, The spacing between adjacent ignition holes of the first ignition hole group (2) and / or the spacing between adjacent ignition holes of the second ignition hole group (3) is k, and the spacing between two adjacent groups of the second ignition hole groups (3) is s, 5k≤s≤10k.

8. The low-temperature combustion tube according to claim 1, characterized in that: The first fire outlet hole groups (2) are arranged in a straight line or in a wave shape.

9. A burner, characterized in that: The low-temperature combustion tube comprises the low-temperature combustion tube according to any one of claims 1 to 8.

10. A baking oven, characterized in that: Comprising the burner according to claim 9.

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