A premix burner

Abstract

The present invention discloses a premix burner, comprising a shell, a cover plate, and an igniter; the shell is in a cylindrical shape with an opening to the right, an annular partition wall is sealed and connected inside the shell, a mixing chamber is formed between the shell and the annular partition wall, an air connection port and a gas inlet hole are respectively provided at the left and right parts of the shell, and the gas inlet hole and the air connection port are both connected to the mixing chamber; an inner cavity is formed inside the annular partition wall, an air inlet hole is provided on the annular partition wall, and the air inlet hole is arranged adjacent to the air connection port; the cover plate is sealed and connected to the shell and the annular partition wall; a first air outlet hole and a piston through hole are provided on the cover plate; the left part of the igniter is arranged in the inner cavity, and the head of the igniter is arranged on the right side of the cover plate. The gas and part of the air are released from the piston through hole to the side of the head of the igniter and ignited; another part of the air enters the inner cavity through the air inlet hole, flows out from the first air outlet hole, cools the igniter, and prevents the gas from flowing back into the inner cavity.

Description

Technical Field

[0001] The present invention relates to the field of premix burners, in particular to premix burners. Background Art

[0002] Premix burners are used in kilns and have the advantages of high combustion efficiency, low air excess coefficient, obvious combustion energy saving effect and low pollutant emissions.

[0003] The premix burner includes an igniter, which is used to ignite the gas. However, the premix burner has the defect that the igniter is easily damaged. Therefore, the prior art needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a premix burner capable of preventing an igniter from being damaged.

[0005] The solution of the present invention to solve its technical problem is:

[0006] A premix burner comprises a shell, a cover plate and an igniter; the shell is in a cylindrical shape with an opening facing right, an annular partition wall is sealed and connected inside the shell, a mixing chamber is formed between the shell and the annular partition wall, an air connection port and a gas inlet hole are respectively provided at the left and right parts of the shell, and both the gas inlet hole and the air connection port are connected with the mixing chamber; an inner cavity is formed in the annular partition wall, an air inlet hole connected with both the inner cavity and the mixing chamber is provided on the annular partition wall, and the air inlet hole is arranged adjacent to the air connection port; the cover plate is sealed and connected with the shell and the annular partition wall; a first air outlet hole connected with the inner cavity is provided on the cover plate, and a piston through hole connected with the mixing chamber is provided on the cover plate; the left part of the igniter is arranged in the inner cavity, and the head of the igniter is arranged on the right side of the cover plate.

[0007] As a further improvement of the above technical solution, it also includes a tray and a pressure lock; the tray is arranged on the right side of the cover plate, the tray is provided with a nozzle, the shell is sealed and connected to the tray, and the tray is provided with a second air outlet; the pressure lock includes a piston head and an elastomer, the piston head is connected to the tray through the elastomer, the cover plate is provided with a piston through hole adapted to the piston head, and the piston head is sealed and connected to the piston through hole.

[0008] As a further improvement of the above technical solution, the right end of the piston through hole is inclined outward, and a sealing slope is provided on the piston head, and the sealing slope is connected to the right part of the piston through hole.

[0009] As a further improvement of the above technical solution, the pressure lock also includes a guide rod, the piston head is sleeved on the guide rod and is slidably connected to the guide rod, the elastomer is fixed to the piston head and the tray, the right end of the guide rod is fixed to the tray, the number of the guide rods and the piston head are both several, and the guide rods are arranged in a ring array.

[0010] As an optional technical solution, the pressure lock also includes a guide rod, an elastomer, a mounting net, and a fixed block. The fixed block is sealedly connected to the cover plate and the tray. A transition through hole is provided on the fixed block. The transition through hole is connected to the piston through hole and the nozzle. The mounting net is fixedly connected to the transition through hole and the guide rod. The piston head is sleeved on the guide rod and is slidably connected to the guide rod. The elastomer is fixedly connected to the piston head and the mounting net. The number of the guide rods and the piston head is several, and the guide rods are arranged in a ring array.

[0011] As an optional technical solution, an air intake ring is sleeved on the shell, a gas connection port is provided on the air intake ring, a ventilation ring groove is provided between the shell and the air intake ring, the ventilation ring groove is connected with the gas connection port and the gas inlet hole, and the number of the gas inlet holes is several.

[0012] As an optional technical solution, the shell includes a main body and a protective cover, the right end of the main body is sealed and connected to the cover plate, and the left and right parts of the protective cover are sealed and connected to the main body and the tray respectively.

[0013] As an optional technical solution, an observation hole is provided on the shell, a window is sealedly connected to the observation hole, and the observation hole is communicated with the inner cavity.

[0014] As a further improvement of the above technical solution, the observation hole is coaxially arranged with the first air outlet hole and the second air outlet hole.

[0015] As an optional technical solution, it also includes a bolt, which is connected to the tray and the shell, and one end of the bolt passes through the cover plate.

[0016] The beneficial effects of the present invention are as follows: the air connection port and the gas inlet hole are used to connect the air source of the external device and the gas source of the external device respectively; the gas and part of the air are released from the piston through hole to the side of the head of the igniter and ignited, and this part of the air will be mixed with the gas in the mixing chamber to improve the combustion efficiency; the other part of the air will enter the inner cavity through the air inlet hole and then flow out from the first air outlet hole, in which process the igniter is cooled and the gas is prevented from flowing back into the inner cavity to protect the igniter. Therefore, the present invention has the benefit of preventing the igniter from being burned out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0018] Figure 1 is a cross-sectional view of embodiment 1 of the present invention;

[0019] Figure 2 is a left side view of the tray 5 and the pressure lock after assembly;

[0020] Figure 3 yes Figure 2 A cross-sectional view of

[0021] Figure 4 is a cross-sectional view of a second embodiment of the present invention;

[0022] Figure 5 A right side view of the second embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0024] Reference Figure 1 to Figure 3 , is the first embodiment of the present invention, specifically:

[0025] A premix burner comprises a shell, a cover plate 4, and an igniter 7;

[0026] The shell is in the shape of a cylinder with an opening facing right, and an annular partition wall 210 is sealed and connected inside the shell, and a mixing chamber 6 is formed between the shell and the annular partition wall 210. The left and right parts of the shell are respectively provided with an air connection port 214 and a gas inlet hole 211, and the gas inlet hole 211 and the air connection port 214 are both connected to the mixing chamber 6;

[0027] An inner cavity 3 is formed in the annular partition wall 210, and an air inlet hole 212 communicating with the inner cavity 3 and the mixing cavity 6 is provided on the annular partition wall 210, and the air inlet hole 212 is arranged adjacent to the air connection port 214;

[0028] The housing and the annular partition wall 210 are both sealed and connected to the cover plate 4; the cover plate 4 is provided with a first air outlet 42 communicating with the inner cavity 3, and the cover plate 4 is provided with a piston through hole 41 communicating with the mixing chamber 6;

[0029] The left portion of the igniter 7 is disposed in the inner cavity 3 , and the head portion of the igniter 7 is disposed on the right side of the cover plate 4 .

[0030] The principle of the present invention is: the air connection port 214 and the gas inlet hole 211 are used to connect the external air source and the external gas source respectively, the air and the gas are mixed in the mixing chamber 6, and then both are released from the piston through hole 41 to the side of the head of the igniter 7 to be ignited; a small amount of air will enter the inner cavity 3 through the air inlet hole 212, and then flow out from the first air outlet hole 42, which can cool the igniter 7 and prevent the gas from flowing back into the inner cavity 3, thereby protecting the igniter 7. Therefore, the present invention has the advantage of preventing the igniter 7 from being burned out.

[0031] Further as a preferred embodiment, it also includes a tray 5 and a pressure lock; the tray 5 is arranged on the right side of the cover plate 4, the tray 5 is provided with a nozzle 51, the shell is sealedly connected to the tray 5, and the tray 5 is provided with a second air outlet 52; the pressure lock includes a piston head 11 and an elastomer 12, the piston head 11 is connected to the tray 5 through the elastomer 12, the cover plate 4 is provided with a piston through hole 41 adapted to the piston head 11, and the piston head 11 is sealedly connected to the piston through hole 41.

[0032] During use, when the pressure of the mixed gas in the mixing chamber 6 is large enough, the pressure lock is pushed open, the elastic body 12 is squeezed, the piston head 11 is disconnected from the piston through hole 41, and the mixed gas can be released through the piston through hole 41 for combustion. When the pressure of the mixed gas is low, flashback is likely to occur. At this time, under the action of the elastic body 12, the piston head 11 is connected to the piston through hole 41, the mixed gas cannot be released, and the combustion stops, thereby preventing the flame from returning to the mixing chamber 6 to cause flashback.

[0033] As a further preferred embodiment, the right end of the piston through hole 41 is inclined outward, and a sealing bevel is provided on the piston head 11, and the sealing bevel is connected to the right part of the piston through hole 41. The structure in which the right end of the piston through hole 41 is inclined outward can be achieved by machining a bevel at the right end of the piston through hole 41. The advantage of this technical solution is that a better sealing effect is achieved and backfire is prevented.

[0034] As an optional embodiment, the pressure lock further includes a guide rod 13, the piston head 11 is sleeved on the guide rod 13 and is slidably connected to the guide rod 13, the elastic body 12 is fixedly connected to the piston head 11 and the tray 5, the right end of the guide rod 13 is fixedly connected to the tray 5, the number of the guide rod 13 and the piston head 11 are both several pieces, and the several guide rods 13 are annularly arrayed. The elastic body 12 can be a spring, and this technical solution is a way to achieve uniform injection of mixed gas.

[0035] As an optional embodiment, an intake ring 22 is sleeved on the shell, and a gas connection port 221 is provided on the intake ring 22. A ventilation ring groove is provided between the shell and the intake ring 22, and the ventilation ring groove is connected to the gas connection port 221 and the gas intake hole 211. The number of the gas intake holes 211 is several. The several gas intake holes 211 are evenly distributed. The gas connection port 221 is used to connect to an external gas source, and the gas source enters the mixing chamber 6 from the several gas intake holes 211 to mix with the air, which is conducive to the uniform distribution of the gas, the uniform mixing of the gas and the air, and the improvement of the combustion efficiency.

[0036] As an optional embodiment, the housing includes a body 215 and a protective cover 216, the right end of the body 215 is sealed and connected to the cover plate 4, and the left and right parts of the protective cover 216 are respectively sealed and connected to the body 215 and the tray 5. The protective cover 216 can facilitate the removal of the tray 5. Since the elastic body 12 is connected to the tray 5, it is a wearing part and needs frequent maintenance. This technical solution can facilitate the maintenance of wearing parts.

[0037] As an optional embodiment, the housing is provided with an observation hole 213, a window is sealed and connected to the observation hole 213, and the observation hole 213 is communicated with the inner cavity 3. The observation hole 213 is mainly used to observe the internal combustion situation.

[0038] As a further preferred embodiment, the observation hole 213 is coaxially arranged with the first air outlet hole 42 and the second air outlet hole 52. With such arrangement, the internal combustion condition between the tray 5 and the cover plate 4 can also be observed.

[0039] As an optional embodiment, a bolt 8 is further included, and the bolt 8 is connected to the tray 5 and the shell, and one end of the bolt 8 passes through the cover plate 4. The impact force of gas and air on the cover plate 4 and the tray 5 is relatively large, and the bolt 8 is used to limit the distance between the tray 5 and the shell, which is a relatively reliable way to ensure that the tray 5 and the shell are not disconnected, and the cover plate 4 is also limited to the left side of the tray 5.

[0040] Reference Figure 4-5, which is the second embodiment of the present invention, and is different from the first embodiment in that:

[0041] The pressure lock also includes a guide rod 13, an elastic body 12, a mounting net 104, and a fixed block 15. The fixed block 15 is sealed and connected to the cover plate 4 and the tray 5. The fixed block 15 is provided with a transition through hole, which is connected to the piston through hole 41 and the nozzle 51. The mounting net 104 is fixedly connected to the transition through hole and the guide rod 13. The piston head 11 is sleeved on the guide rod 13 and is slidably connected to the guide rod 13. The elastic body 12 is fixedly connected to the piston head 11 and the mounting net 104. The number of the guide rods 13 and the piston head 11 is several, and the guide rods 13 are arranged in a ring array. The mixed gas is ejected through the piston through hole 41, the mounting net 104, the transition through hole, and the nozzle 51 in sequence. The mounting net 104 is provided with a mesh to allow the gas to pass through. The fixing block 15 not only fixes the installation net 104, but also limits the distance between the cover plate 4 and the tray 5, thereby preventing the cover plate 4 from moving toward the tray 5 under the impact of gas or air.

[0042] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A premix burner, characterized in that: It comprises a housing, a cover plate (4), and an igniter (7); The shell is in the shape of a cylinder with an opening facing rightwards, an annular partition wall (210) is sealedly connected inside the shell, a mixing chamber (6) is formed between the shell and the annular partition wall (210), an air connection port (214) and a gas inlet hole (211) are respectively provided at the left and right parts of the shell, and the gas inlet hole (211) and the air connection port (214) are both in communication with the mixing chamber (6); An inner cavity (3) is formed in the annular partition wall (210), and an air inlet hole (212) is provided on the annular partition wall (210) and is in communication with the inner cavity (3) and the mixing cavity (6), and the air inlet hole (212) is arranged adjacent to the air connection port (214); The cover plate (4) is sealedly connected to the shell and the annular partition wall (210); the cover plate (4) is provided with a first air outlet (42) communicating with the inner cavity (3); and the cover plate (4) is provided with a piston through hole (41) communicating with the mixing cavity (6); The left part of the igniter (7) is arranged in the inner cavity (3), and the head of the igniter (7) is arranged on the right side of the cover plate (4); and also includes a tray (5) and a pressure lock; The tray (5) is arranged on the right side of the cover plate (4), a nozzle (51) is arranged on the tray (5), the shell is sealedly connected to the tray (5), and a second air outlet (52) is arranged on the tray (5); The pressure lock comprises a piston head (11) and an elastic body (12); the piston head (11) is connected to the tray (5) via the elastic body (12); and the piston head (11) is sealedly connected to the piston through hole (41); The right end of the piston through hole (41) is inclined outwards, and a sealing inclined surface is provided on the piston head (11), and the sealing inclined surface is connected to the right part of the piston through hole (41).

2. The premix burner according to claim 1, characterized in that: The pressure lock further comprises a guide rod (13), the piston head (11) is sleeved on the guide rod (13) and is slidably connected to the guide rod (13), the elastic body (12) is fixedly connected to the piston head (11) and the tray (5), the right end of the guide rod (13) is fixedly connected to the tray (5), the number of the guide rods (13) and the piston head (11) are both several, and the several guide rods (13) are arranged in a ring array.

3. The premix burner according to claim 1, characterized in that: The pressure lock further comprises a guide rod (13), an elastic body (12), a mounting net (104), and a fixed block (15); the fixed block (15) is sealedly connected to the cover plate (4) and the tray (5); a transition through hole is provided on the fixed block (15); the transition through hole is communicated with the piston through hole (41) and the nozzle (51); the mounting net (104) is fixedly connected to the transition through hole and the guide rod (13); the piston head (11) is sleeved on the guide rod (13) and is slidably connected to the guide rod (13); the elastic body (12) is fixedly connected to the piston head (11) and the mounting net (104); the number of the guide rods (13) and the piston head (11) is several, and the several guide rods (13) are arranged in a ring array.

4. The premix burner according to claim 1, characterized in that: An air intake ring (22) is sleeved on the shell body, a gas connection port (221) is provided on the air intake ring (22), a ventilation ring groove is provided between the shell body and the air intake ring (22), the ventilation ring groove is communicated with the gas connection port (221) and the gas intake hole (211), and the number of the gas intake holes (211) is multiple.

5. The premix burner according to claim 1, characterized in that: The shell comprises a main body (215) and a protective cover (216); the right end of the main body (215) is sealedly connected to the cover plate (4); the left and right parts of the protective cover (216) are respectively sealedly connected to the main body (215) and the tray (5).

6. The premix burner according to claim 1, characterized in that: The shell is provided with an observation hole (213), a window is sealedly connected to the observation hole (213), and the observation hole (213) is in communication with the inner cavity (3).

7. The premix burner according to claim 6, characterized in that: The observation hole (213) is coaxially arranged with the first air outlet hole (42) and the second air outlet hole (52).

8. The premix burner according to claim 1, characterized in that: It also includes a bolt (8), wherein the bolt (8) is connected to the tray (5) and the shell, and one end of the bolt (8) passes through the cover plate (4).

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