A central screw-flame burner

Abstract

The utility model discloses a central spiral flame -out's combustor, including combustor main part, the middle part of combustor main part is provided with the axial through channel, the top of combustor main part is installed with the fire cover, the inside of combustor main part is provided with the central gas cavity around axial through channel, the top of central gas cavity is sealed through the fire cover, the top of radial inboard wall of central gas cavity is provided with the conical surface, the fire cover and conical surface form the gas outlet channel that surrounds the axial through channel even setting between several, the gas outlet channel is oblique spiral setting around axial through channel, form the flame -out that is spiral through setting conical surface and gas outlet channel, make the firepower of the flame of combustor's middle part more concentrated, and the firepower of combustor main part's middle part is matched with the flame temperature of other positions, and the heating of article is more uniform.

Description

Technical Field

[0001] This utility model relates to the field of gas burner technology, specifically a burner with a central spiral flame output. Background Technology

[0002] Burners are commonly used components in gas appliances. Existing burners often have multiple rings of flame outlets around the center to heat items above the burner. However, the flame intensity of the center flame of existing burners is relatively small and cannot be equal to the flame intensity of the surrounding rings of flame outlets, resulting in uneven heating of items and affecting the combustion heating effect. Utility Model Content

[0003] This invention provides a burner with a central spiral flame outlet, which can solve the problem of uneven heating of the entire burner due to the poor heating effect of the central flame outlet in existing burners.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a burner with a central spiral flame output, comprising a burner body, an axially penetrating channel in the middle of the burner body, a flame outlet cap on the top of the burner body, a central gas chamber surrounding the axially penetrating channel inside the burner body, the top of the central gas chamber being sealed by the flame outlet cap, a conical surface on the top of the radial inner sidewall of the central gas chamber, and several gas outlet channels uniformly arranged around the axially penetrating channel formed between the flame outlet cap and the conical surface, the gas outlet channels being arranged in an oblique spiral around the axially penetrating channel. By setting the conical surface and the gas outlet channels, a spiral flame output is formed, making the flame intensity in the middle of the burner more concentrated and matching the flame intensity in the middle of the burner body with the flame temperature in other positions, resulting in more uniform heating of the items.

[0005] Preferably, a detachable fire tube is axially mounted on the upper part of the radial inner wall of the central gas chamber, and the conical surface is located at the top of the fire tube in the axial direction, allowing the fire tube to be replaced and adjusted.

[0006] Preferably, an air inlet is provided on one side of the central air chamber to facilitate the introduction of external gas into the central air chamber. The air inlet can be set tangentially along the central air chamber to form a spiral airflow inside the central air chamber, which matches the air outlet channel and increases the air output.

[0007] Preferably, the center of the flame outlet cover is provided with multiple protrusions around the circumference corresponding to the conical surface. The protrusions are in contact with the conical surface, and the air outlet channel is set between adjacent protrusions. The air outlet channel is formed by the protrusions, which makes the processing relatively simple.

[0008] Preferably, the position where the boss contacts the conical surface is provided with a smooth surface, so that the boss and the conical surface can fit precisely, reducing gaps and allowing the gas to be discharged only from the gas outlet channel.

[0009] Compared with the prior art, the beneficial effects of this utility model are: By setting a conical surface and an exhaust channel, a spiral flame is formed, which makes the firepower of the flame in the middle of the burner more concentrated and matches the firepower in the middle of the burner body with the flame temperature in other positions. This results in more uniform heating of the items, thus solving the problem of uneven heating of the entire burner caused by the poor heating effect of the center flame of existing burners. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural view of the present invention after the flame outlet cap has been removed; Figure 3 This is a front sectional view of the present invention; Figure 4 This is a side sectional view of the present invention; Figure 5 This is a bottom view of the flame outlet cover of this utility model.

[0011] The attached diagram shows the following reference numerals: 1. Burner body; 2. Air inlet; 3. Central air chamber; 4. Flame outlet pipe; 5. Flame outlet cap; 6. Axial through channel; 7. Air outlet channel; 8. Boss; 9. Smooth surface; 10. Conical surface. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0013] like Figure 1-5As shown, this utility model provides a burner with a central spiral flame output, including a burner body 1. An axially penetrating channel 6 is provided in the middle of the burner body 1. A flame outlet cover 5 is installed on the top of the burner body 1. A central gas chamber 3 is provided inside the burner body 1, surrounding the axially penetrating channel 6. The top of the central gas chamber 3 is sealed by the flame outlet cover 5. A conical surface 10 is provided on the top of the radial inner wall of the central gas chamber 3. Several gas outlet channels 7 are evenly arranged around the axially penetrating channel 6 between the flame outlet cover 5 and the conical surface 10. The gas outlet channels 7 are arranged in an oblique spiral around the axially penetrating channel 6. By setting the conical surface 10 and the gas outlet channels 7, a spiral flame output is formed, making the flame intensity in the middle of the burner more concentrated and matching the flame intensity in the middle of the burner body 1 with the flame temperature in other positions, resulting in more uniform heating of the item.

[0014] Specifically, the burner body 1 is made of cast iron, with an outer diameter of 150mm and a height of 80mm; the axial through-channel 6 has a diameter of 30mm and is used for secondary air supply and ignition needle installation. The central air chamber 3 is an annular structure with an inner diameter of 80mm, an outer diameter of 120mm, and a height of 50mm; an air inlet 2 with a diameter of 8mm is set on one side, and is set at a 45° angle to the horizontal direction along the tangent of the central air chamber to ensure that the gas enters and forms a clockwise spiral airflow.

[0015] The fire tube 4 is detachable and is connected to the upper part of the radial inner wall of the central gas chamber by thread. It is made of 310S stainless steel; the top conical surface 10 has a taper of 60° and an axial height of 10mm.

[0016] In this embodiment, a detachable fire tube 4 is axially mounted on the upper part of the radial inner wall of the central gas chamber 3, and the conical surface 10 is located at the axial top of the fire tube 4. The fire tube 4 can be replaced and adjusted.

[0017] In this embodiment, an air inlet 2 is provided on one side of the central air chamber 3 to facilitate the introduction of external gas into the central air chamber 3. The air inlet 2 can be arranged tangentially along the central air chamber 3 to form a spiral airflow inside the central air chamber 3, which matches the air outlet channel 7 and increases the air output.

[0018] In this embodiment, the middle part of the flame cover 5 is provided with a plurality of protrusions 8 around the circumference at the position corresponding to the conical surface 10. The protrusions 8 are in contact with the conical surface 10. The air outlet channel 7 is arranged between adjacent protrusions 8. The air outlet channel 7 is formed by the protrusions 8, which is relatively simple to process.

[0019] Preferably, a smooth surface 9 is provided at the position where the boss 8 contacts the conical surface 10, so that the boss 8 and the conical surface 10 can fit precisely, reducing gaps and allowing the gas to be discharged only from the gas outlet channel 7. The gas outlet channel 7 is located between adjacent bosses, with 8-10 channels, and is at an angle of 30° to the axial direction. The spiral direction is consistent with the airflow in the central gas chamber (clockwise), ensuring that the rotational angular velocity of the gas is 10 rad / s when it is ejected. The roughness of the smooth surface 9 in contact with the conical surface is Ra0.8, ensuring that the fitting gap is ≤0.1mm.

[0020] As an assembly step in this embodiment: S1: Screw the fire tube 4 into the upper part of the inner wall of the central gas chamber 3 through the thread, and tighten it until the top surface of the conical surface 10 is flush with the top surface of the central gas chamber. S2: Fasten the flameout cap 5 to the top of the burner body 1 so that the smooth surface 9 of the boss 8 fits tightly against the conical surface (10); S3: Connect the external gas pipeline (pressure 2kPa) through the air inlet 2 to complete the assembly.

[0021] Working process: The gas enters the central gas chamber (3) tangentially through the air inlet 2, forming a clockwise spiral airflow (because the air inlet direction matches the tangent of the gas chamber); when the airflow rises to the conical surface (10), it is separated by the boss 8 and accelerated out through the air outlet channel 7 (flow velocity 20m / s). Due to the oblique spiral design of the channel, the gas further rotates and mixes with the air; after ignition, a spiral rising flame is formed (height 50-80mm), with a center temperature of 1200℃ and an outer perimeter temperature of 1150℃, achieving uniform heating.

[0022] In this embodiment, the spiral flame output forms a rotating, upward-flowing flame stream through the obliquely spiral exhaust channel 7. Compared to traditional direct-injection flames, the contact area between the flame and the heated object increases by more than 30%, extending the heat exchange time and improving thermal efficiency by 15%-20%. Simultaneously, the spiral airflow draws surrounding air into the combustion zone, resulting in more thorough mixing of fuel gas and oxygen, and more complete combustion. The axial temperature concentration of the central spiral flame is increased, and a stable temperature gradient is formed through the spiral circulation: the temperature difference between the central high-temperature zone and the outer flame zone is controlled within 50℃. For example, when heating the bottom of a 20cm diameter pot, the temperature difference between the center point and the edge of the pot is ≤30℃, solving the "heating dead zone" problem caused by insufficient central firepower in traditional burners.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A burner with a central spiral flame output, characterized in that, The device includes a burner body (1), an axial through channel (6) is provided in the middle of the burner body (1), a flame outlet cover (5) is installed on the top of the burner body (1), a central gas chamber (3) is provided inside the burner body (1) around the axial through channel (6), the top of the central gas chamber (3) is sealed by the flame outlet cover (5), a conical surface (10) is provided on the top of the radial inner sidewall of the central gas chamber (3), and a plurality of gas outlet channels (7) are formed between the flame outlet cover (5) and the conical surface (10) and are evenly arranged around the axial through channel (6), and the gas outlet channels (7) are arranged in an oblique spiral around the axial through channel (6).

2. The burner with a central spiral flame outlet according to claim 1, characterized in that: A detachable fire tube (4) is axially mounted on the upper part of the radial inner wall of the central gas chamber (3), and the conical surface (10) is located at the top of the fire tube (4) in the axial direction.

3. The burner with a central spiral flame outlet according to claim 2, characterized in that: An air inlet (2) is provided on one side of the central air chamber (3).

4. The burner with a central spiral flame outlet according to claim 1, characterized in that: The flame outlet cover (5) has multiple protrusions (8) arranged around the circumference at the position corresponding to the conical surface (10) in the middle. The protrusions (8) are in contact with the conical surface (10), and the air outlet channel (7) is arranged between adjacent protrusions (8).

5. The burner with a central spiral flame outlet according to claim 4, characterized in that: The position where the boss (8) contacts the conical surface (10) is provided with a smooth surface (9).

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