Graded fuel gas low-nitrogen burner

Abstract

The utility model discloses a graded gas low-nitrogen burner which comprises a connecting flange and a burning cylinder connected to the connecting flange, a graded gas pipe is arranged in the burning cylinder, a second connecting pipe is fixedly installed on the inner cavity wall of the burning cylinder, a first connecting pipe is fixedly installed on one side wall of the graded gas pipe, and a second connecting pipe is fixedly installed on the other side wall of the graded gas pipe. Limiting blocks are fixedly mounted on the two side walls of the end of the graded gas pipe correspondingly, limiting holes are formed in the surfaces of the limiting blocks, and limiting assemblies are arranged on the two side walls of the combustion cylinder correspondingly. The limiting assembly is installed on the surface of the combustion cylinder, the limiting block is fixed to the surface of the end of the graded gas pipe, and the limiting hole is formed in the surface of the limiting block, so that when the graded gas pipe is connected with the combustion cylinder, the limiting rod can be inserted into the limiting hole under the action of the limiting assembly, and the graded gas pipe is connected with the combustion cylinder. And the limiting rods can be conveniently taken out from the limiting holes, so that detachable connection between the combustion cylinder and the graded gas pipe is realized, and the combustion cylinder and the graded gas pipe can be conveniently detached for subsequent maintenance.

Description

Technical Field

[0001] This utility model relates to the field of low-NOx burner technology, specifically a staged gas low-NOx burner. Background Technology

[0002] A burner is a general term for a device that sprays fuel and air out in a certain way to mix and burn. Nitrogen oxides are one of the main causes of air pollution, and the control of nitrogen oxide emissions is particularly strict. Nitrogen oxide emissions mainly come from the combustion of nitrogen-containing fuels. In the combustion process, inhibiting the formation of nitrogen oxides mainly depends on the burner on the combustion equipment.

[0003] Chinese patent CN212929993U discloses a staged low-NOx burner, which includes a blower, an induced draft pipe, a combustion chamber, nozzles, and a staged chamber. An electrical control box is located at the left end of the blower, and an input port is located at the front end of the blower. Multiple sets of fixing bolts are installed on the induced draft pipe, which is fixedly installed on the input port by the multiple sets of fixing bolts. A connecting flange is located at the left end of the combustion chamber, and the left end of the combustion chamber is fixedly connected to the output end of the blower through the connecting flange. The nozzles are fixedly installed at the right end of the combustion chamber, and a feed pipe is located at the bottom end of the combustion chamber. The left end of the exhaust pipe is fixedly connected to the hollow cavity. Multiple sets of nozzles are arranged in a ring at equal intervals at the right end of the staged chamber, and the input ends of the multiple sets of nozzles are all connected to the interlayer cavity. Straight nozzles are provided at the right ends of the multiple sets of nozzles.

[0004] However, the staged gas low-NOx burner disclosed in the above patent still has some inconveniences in actual use. Since the staged gas pipe is fixed inside the combustion cylinder by bolts, the combustion cylinder and staged gas pipe need to be disassembled regularly for maintenance. The fixed connection between the staged gas pipe and the combustion cylinder makes it inconvenient to disassemble them, which is not conducive to subsequent maintenance and is quite inconvenient. Utility Model Content

[0005] The purpose of this utility model is to provide a staged gas low-NOx burner to solve the problem mentioned in the background art that the combustion cylinder and staged gas pipe of the existing staged gas low-NOx burner are fixedly connected, which makes it inconvenient to disassemble and maintain.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a staged gas low-NOx burner, comprising a connecting flange and a combustion cylinder connected to the connecting flange, wherein a staged gas pipe is provided inside the combustion cylinder, a second connecting pipe is fixedly installed on the inner wall of the combustion cylinder, a first connecting pipe adapted to the second connecting pipe is fixedly installed on one side wall of the staged gas pipe, and limit blocks are fixedly installed on both side walls of the end of the staged gas pipe, with limit holes formed on the surface of the limit blocks, and limit components are provided on both side walls of the combustion cylinder.

[0007] Preferably, the limiting component includes a fixing frame, a toggle block, a reset plate, a reset spring, and a limiting rod.

[0008] Preferably, there are two fixing brackets, which are respectively fixedly installed on the surface of the combustion cylinder, and the positions of the fixing brackets correspond to those of the limiting block.

[0009] Preferably, the rod body of the limiting rod is located in the inner cavity of the fixing frame, and the outer end of the limiting rod moves through the outer side wall of the fixing frame, the inner end of the limiting rod moves through the cylinder surface of the combustion cylinder, and the rod body of the limiting rod is adapted to the cavity of the limiting hole.

[0010] Preferably, the actuating block is fixedly installed on the outer end of the limiting rod, and the reset plate and the reset spring are both located in the inner cavity of the fixing frame.

[0011] Preferably, the reset plate is fixedly sleeved on the surface of the limiting rod, and the reset spring is sleeved on the limiting rod, with the reset spring located on the side of the reset plate away from the combustion cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention achieves a detachable connection between the combustion chamber and the staged gas pipe by installing a limiting component on the surface of the combustion chamber, fixing a limiting block on the end surface of the staged gas pipe, and opening a limiting hole on the surface of the limiting block. This allows the limiting rod to be inserted into the limiting hole under the action of the limiting component when the staged gas pipe is connected to the combustion chamber, and the limiting rod can be easily removed from the limiting hole under the action of the return spring. This facilitates the disassembly of the combustion chamber and the staged gas pipe, making subsequent maintenance easier. Attached Figure Description

[0014] Figure 1 This is a first-view exploded structural diagram of a staged gas low-NOx burner according to the present invention;

[0015] Figure 2This is a second-view exploded structural diagram of a staged gas low-NOx burner according to the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of a staged gas low-NOx burner according to the present invention.

[0017] In the diagram: 1. Connecting flange; 2. Combustion cylinder; 3. Fixing bracket; 4. Staged gas pipe; 5. Limiting block; 6. Limiting hole; 7. First connecting pipe; 8. Actuating block; 9. Second connecting pipe; 10. Reset plate; 11. Reset spring; 12. Limiting rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 , Figure 2 , Figure 3 This utility model provides a technical solution: a staged gas low-NOx burner, including a connecting flange 1 and a combustion cylinder 2. The connecting flange 1 facilitates the installation of the combustion cylinder 2 on the burner. A staged gas pipe 4 is disposed inside the combustion cylinder 2, and the two are used in conjunction. A second connecting pipe 9 is welded to the inner wall of the combustion cylinder 2, and a first connecting pipe 7 is welded to one side wall of the staged gas pipe 4. The first connecting pipe 7 and the second connecting pipe 9 are adapted to each other, so that when connecting the combustion cylinder 2 and the staged gas pipe 4, the first connecting pipe 7 and the second connecting pipe 9 can be threaded together first. Two limiting blocks 5 are respectively welded to the upper and lower side walls of the end of the staged gas pipe 4. Limiting holes 6 are opened on the surface of the limiting blocks 5. Limiting components are provided on the upper and lower side walls of the combustion cylinder 2 for use with the limiting holes 6, thereby fixing the combustion cylinder 2 and the staged gas pipe 4.

[0020] The limiting assembly includes a fixed frame 3, a toggle block 8, a reset plate 10, a reset spring 11, and a limiting rod 12. Two fixed frames 3 are provided, welded to the upper and lower surfaces of the combustion cylinder 2 respectively, with the fixed frames 3 corresponding to the positions of the limiting blocks 5. The limiting rod 12 is located within the inner cavity of the fixed frame 3, with its outer end extending through the outer wall of the fixed frame 3 and its inner end extending through the surface of the combustion cylinder 2. This allows the limiting rod 12 to move up and down; the end furthest from the combustion cylinder 2 is the outer end, and vice versa. The limiting rod 12 is fitted into the cavity of the limiting hole 6, facilitating insertion into the limiting hole 6. The toggle block 8 is welded to the outer end of the limiting rod 12, allowing for easy movement of the limiting rod 12. The reset plate 10 and the reset spring 11 are both located in the inner cavity of the fixed frame 3. The reset plate 10 is welded to the surface of the rod body of the limiting rod 12, and the reset spring 11 is sleeved on the rod body of the limiting rod 12. The reset spring 11 is located on the side of the reset plate 10 away from the combustion cylinder 2, which is to facilitate the automatic reset of the limiting rod 12. When it is necessary to disassemble the combustion cylinder 2 and the staged gas pipe 4, first pull the two actuating blocks 8 outwards simultaneously. During the movement of the actuating blocks 8, the limiting rod 12 will move together, and then the inner end of the limiting rod 12 will be pulled out from the limiting hole 6 of the limiting block 5. During this process, the reset plate 10 will squeeze the reset spring 11. After the limiting rod 12 is pulled out, the staged gas pipe 4 can be screwed to separate the first connecting pipe 7 from the second connecting pipe 9, thereby separating and disassembling the combustion cylinder 2 and the staged gas pipe 4, which facilitates the maintenance of both. When it is necessary to reassemble them, first control the limiting rod 12 to the outside by using the actuating blocks 8, then screw the staged gas pipe 4. After the limiting block 5 and the limiting rod 12 are aligned, release the actuating blocks 8. Under the action of the reset spring 11, the limiting rod 12 will automatically insert into the limiting hole 6.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A staged gas low-NOx burner, comprising a connecting flange (1) and a combustion cylinder (2) connected to the connecting flange (1), wherein a staged gas pipe (4) is provided inside the combustion cylinder (2), characterized in that: The inner wall of the combustion cylinder (2) is fixedly installed with a second connecting pipe (9), and a first connecting pipe (7) adapted to the second connecting pipe (9) is fixedly installed on one side wall of the staged gas pipe (4). Limiting blocks (5) are fixedly installed on both sides of the end of the staged gas pipe (4). Limiting holes (6) are opened on the surface of the limiting blocks (5). Limiting components are provided on both sides of the combustion cylinder (2).

2. A staged gas low NOx combustor as recited in claim 1 wherein: The limiting assembly includes a fixing frame (3), a toggle block (8), a reset plate (10), a reset spring (11), and a limiting rod (12).

3. A staged gas low NOx combustor as recited in claim 2 wherein: There are two fixing brackets (3), which are respectively fixedly installed on the surface of the combustion cylinder (2) and the positions of the fixing brackets (3) on the limiting block (5) are corresponding.

4. A staged gas low-NOx burner according to claim 3, characterized in that: The rod body of the limiting rod (12) is located in the inner cavity of the fixing frame (3), and the outer end of the limiting rod (12) moves through the outer side wall of the fixing frame (3), and the inner end of the limiting rod (12) moves through the cylinder surface of the combustion cylinder (2). The rod body of the limiting rod (12) is adapted to the cavity of the limiting hole (6).

5. A staged gas low NOx combustor as recited in claim 4 wherein: The actuating block (8) is fixedly installed on the outer end of the limiting rod (12), and the reset plate (10) and the reset spring (11) are both located in the inner cavity of the fixing frame (3).

6. A staged gas low-NOx burner according to claim 5, characterized in that: The reset plate (10) is fixedly sleeved on the surface of the limit rod (12), and the reset spring (11) is sleeved on the rod of the limit rod (12). The reset spring (11) is located on the side of the reset plate (10) away from the combustion cylinder (2).

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