Low-nitrogen burner for gas-fired boiler

Abstract

The utility model relates to the technical field of gas-fired boilers, in particular to a low-nitrogen burner for a gas-fired boiler, which comprises a cleaning base, and one side of the cleaning base is provided with a cleaning slot; gas generated after combustion exchanges heat with liquid in the boiler in the process of penetrating through a ventilation pipe to achieve secondary utilization of energy, at the moment, a cleaning frame is inserted into a cleaning insertion groove formed in the side wall of a cleaning base, and meanwhile a limiting insertion rod is screwed into a screwing hole to be inserted into a hole formed in the surface of an extension plate to complete limiting of the cleaning frame; therefore, the situation that the contact area of the ventilation pipe and water is affected by displacement of the cleaning frame in the using process, and the heating efficiency is affected is avoided.

Description

Technical Field

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

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. Gas-fired boilers include gas-fired hot water boilers, gas-fired hot water boilers, and gas-fired steam boilers, among which gas-fired hot water boilers are also called gas-fired heating boilers and gas-fired bathing boilers.

[0003] Publication No. CN215724130U discloses a gas boiler using a low-NOx burner, which has the advantages of convenient operation, high heat exchange efficiency and better practicality. However, during the use of this equipment, the heat exchange tubes are placed inside the boiler for a long time, which will cause scale to adhere to the surface of the heat exchange tubes. Moreover, the inner ring of the circular heat exchange tubes is inconvenient to clean and requires complete disassembly for maintenance, which is time-consuming, labor-intensive and has relatively low maintenance efficiency. Therefore, we propose a low-NOx burner for gas boilers. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a low-NOx burner for gas-fired boilers.

[0005] The technical solution adopted by this utility model to solve its technical problem is a low-NOx burner for a gas boiler, including a cleaning base. A cleaning slot is provided on one side of the cleaning base. Multiple air exchange pipes distributed in a circle are installed inside the cleaning slot. The outer periphery of the multiple air exchange pipes is set inside the cleaning frame. An extension plate is fixedly connected to the top of the cleaning frame. A screw hole is provided at the top of the cleaning base, and an insertion hole that matches the screw hole is provided on the surface of the extension plate.

[0006] Each of the ventilation pipes is slidably connected to a rotating connector on its outer periphery. The inner wall of the rotating connector is fitted with a threaded cleaning brush for cleaning. The rotating connector rotates inside the cleaning frame via a rotating shaft.

[0007] By adopting the above technical solution, the gas generated after combustion exchanges heat with the liquid in the boiler during the process of passing through the air exchange pipe to realize the secondary utilization of energy. At this time, the cleaning rack is inserted into the cleaning slot opened on the side wall of the cleaning base, and the limiting rod is screwed into the screw hole and inserted into the hole opened on the surface of the extension plate to complete the limiting of the cleaning rack, thereby avoiding the impact on the contact area between the air exchange pipe and the water and the heating efficiency due to the displacement of the cleaning rack during use.

[0008] When scale adheres to the surface of the ventilation pipe, unscrew the limit rod to pull out the cleaning frame, and then push the cleaning frame to slide back and forth on the surface of the ventilation pipe. The threaded cleaning brush drives the rotating connector to rotate in the rotating shaft opened on the side wall of the cleaning frame during the cleaning process, thereby speeding up the efficiency of scale removal and quickly cleaning the scale on the surface of the ventilation pipe.

[0009] Specifically, a limiting rod is inserted through the insertion hole and the threaded hole on the surface of the extension plate, and the top end of the limiting rod is provided with a thread for screwing into the threaded hole for locking.

[0010] By adopting the above technical solution, the cleaning frame is limited during use by inserting the limiting rod through the screw hole into the insertion hole on the surface of the extension plate, and it is convenient to remove it for surface cleaning during cleaning and maintenance.

[0011] Specifically, the end of each of the ventilation pipes away from the cleaning base is fitted to the side wall of the combustion chamber, and the end of the combustion chamber away from the ventilation pipe is fitted with an air intake pipe.

[0012] By adopting the above technical solution, natural gas and oxygen-containing air input through the intake pipe are burned inside the combustion chamber, and the gas produced after combustion is then input into each connected ventilation pipe.

[0013] Specifically, the end of the cleaning base away from the ventilation pipe is equipped with an exhaust pipe.

[0014] By adopting the above technical solution, the high-temperature gas in the air exchange pipe is discharged through the exhaust pipe after completing heat transfer with the liquid in the boiler.

[0015] Specifically, the combustion chamber is internally equipped with a multi-way pipe for connecting the air exchange pipe and the air intake pipe.

[0016] By adopting the above technical solution, when natural gas and oxygen-containing air are input into the combustion chamber, they are heated and then enter multiple air exchange pipes through multiple pipelines for secondary heating.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The gas generated after combustion in this application exchanges heat with the liquid in the boiler during the process of passing through the air exchange pipe, realizing the secondary utilization of energy. At this time, the cleaning rack is inserted into the cleaning slot opened on the side wall of the cleaning base, and the limiting rod is screwed into the screw hole and inserted into the hole opened on the surface of the extension plate to complete the limiting of the cleaning rack, thereby avoiding the impact on the contact area between the air exchange pipe and the water and the heating efficiency due to the displacement of the cleaning rack during use.

[0019] When scale adheres to the surface of the ventilation pipe, unscrew the limit rod to pull out the cleaning frame, and then push the cleaning frame to slide back and forth on the surface of the ventilation pipe. The threaded cleaning brush drives the rotating connector to rotate in the rotating shaft opened on the side wall of the cleaning frame during the cleaning process, thereby speeding up the efficiency of scale removal and quickly cleaning the scale on the surface of the ventilation pipe. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is an isometric view of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure between the cleaning base and the cleaning frame of this utility model;

[0023] Figure 3 This is a schematic diagram of the connection structure between the cleaning frame and the rotating connector of this utility model;

[0024] In the diagram: 1. Cleaning base; 2. Cleaning slot; 3. Ventilation pipe; 4. Cleaning frame; 5. Extension plate; 6. Threaded hole; 7. Limiting rod; 8. Rotating shaft; 9. Rotating connector; 10. Threaded cleaning brush; 11. Combustion liner; 12. Exhaust pipe; 13. Intake pipe. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Please see Figure 1-3 This utility model provides a technical solution: a low-NOx burner for a gas boiler, including a cleaning base 1, a cleaning slot 2 on one side of the cleaning base 1, a plurality of circularly distributed air exchange pipes 3 inside the cleaning slot 2, the outer periphery of the plurality of air exchange pipes 3 being arranged inside the cleaning frame 4, an extension plate 5 fixedly connected to the top of the cleaning frame 4, a screw hole 6 on the top of the cleaning base 1, and an insertion hole that fits into the screw hole 6 on the surface of the extension plate 5.

[0027] Each ventilation pipe 3 is slidably connected to a rotating connector 9 on its outer periphery. The inner wall of the rotating connector 9 is fitted with a threaded cleaning brush 10 for cleaning. The rotating connector 9 rotates inside the cleaning frame 4 via a rotating shaft 8.

[0028] During use, the gas produced after combustion exchanges heat with the liquid in the boiler as it passes through the air exchange pipe 3, thus realizing the secondary utilization of energy. At this time, the cleaning rack 4 is inserted into the cleaning slot 2 opened on the side wall of the cleaning base 1, and the limiting rod 7 is screwed into the screw hole 6 and inserted into the hole opened on the surface of the extension plate 5 to limit the cleaning rack 4, thereby avoiding the impact on the contact area between the air exchange pipe 3 and the water and the heating efficiency due to the displacement of the cleaning rack 4 during use.

[0029] When scale adheres to the surface of the ventilation pipe 3, unscrew the limiting rod 7 to pull out the cleaning frame 4, and then push the cleaning frame 4 to slide back and forth on the surface of the ventilation pipe 3. The threaded cleaning brush 10 can drive the rotating connector 9 to rotate in the rotating shaft 8 opened on the side wall of the cleaning frame 4 during the cleaning process, thereby speeding up the efficiency of cleaning scale and quickly cleaning the scale on the surface of the ventilation pipe 3.

[0030] As shown in the figure, a limiting rod 7 is inserted through the insertion hole and the threaded hole 6 on the surface of the extension plate 5, and the top of the limiting rod 7 is provided with a thread for screwing into the threaded hole 6 for locking.

[0031] During use, the limiting rod 7 is inserted into the insertion hole on the surface of the extension plate 5 through the screw hole 6 to limit the cleaning frame 4 during use, and to facilitate removal for surface cleaning during cleaning and maintenance.

[0032] As shown in the figure, the end of each air exchange pipe 3 away from the cleaning base 1 is fitted to the side wall of the combustion liner 11, and the end of the combustion liner 11 away from the air exchange pipe 3 is fitted with an air intake pipe 13.

[0033] During use, natural gas and oxygen-containing air input through the air intake pipe 13 are burned inside the combustion chamber 11, and the gas produced after combustion is then input into each connected ventilation pipe 3.

[0034] As shown in the figure, an exhaust pipe 12 is installed at the end of the cleaning base 1 away from the ventilation pipe 3.

[0035] During use, the high-temperature gas in the air exchange pipe 3 is discharged through the exhaust pipe 12 after completing heat transfer with the liquid inside the boiler.

[0036] As shown in the figure, the combustion chamber 11 is equipped with a multi-port pipe for connecting the air exchange pipe 3 and the air intake pipe 13.

[0037] When in use, when natural gas and oxygen-containing air are input into the combustion chamber 11, they are heated and then enter multiple ventilation pipes 3 through multiple pipelines for secondary heating.

[0038] The working principle and usage process of this utility model are as follows: Natural gas and oxygen-containing air input through the air inlet pipe 13 are burned in the combustion chamber 11. The resulting gas is then passed through multiple pipelines into multiple ventilation pipes 3 for secondary heating. After the high-temperature gas in the ventilation pipes 3 completes heat transfer with the liquid inside the boiler, it is discharged through the exhaust pipe 12. During the process of passing through the ventilation pipes 3, the gas generated after combustion exchanges heat with the liquid inside the boiler, achieving secondary energy utilization. At this time, the cleaning rack 4 is inserted into the cleaning slot 2 opened on the side wall of the cleaning base 1. Simultaneously, the limiting rod 7 is screwed into the threaded hole 6 and inserted into the hole opened on the surface of the extension plate 5 to limit the cleaning rack 4, thereby preventing it from being used... During the process, the displacement of the cleaning frame 4 affects the contact area between the ventilation pipe 3 and the water, thus affecting the heating efficiency. The limiting rod 7 is inserted into the insertion hole on the surface of the extension plate 5 through the screw hole 6 to limit the cleaning frame 4 during use and facilitate its removal for surface cleaning during cleaning and maintenance. When scale is attached to the surface of the ventilation pipe 3, the limiting rod 7 is unscrewed to pull out the cleaning frame 4. Then, the cleaning frame 4 is pushed to slide back and forth on the surface of the ventilation pipe 3. The threaded cleaning brush 10 drives the rotating connector 9 to rotate in the rotating shaft 8 opened on the side wall of the cleaning frame 4 during the cleaning process, thereby speeding up the scale removal efficiency and quickly cleaning the scale on the surface of the ventilation pipe 3.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-nitrogen combustion machine for a gas boiler, characterized by, The cleaning base (1) is provided with a cleaning slot (2) on one side. The cleaning slot (2) is equipped with a number of air exchange pipes (3) arranged in a circular pattern. The outer periphery of the number of air exchange pipes (3) is arranged inside the cleaning frame (4). An extension plate (5) is fixedly connected to the top of the cleaning frame (4). A screw hole (6) is provided at the top of the cleaning base (1), and an insertion hole that matches the screw hole (6) is provided on the surface of the extension plate (5). Each of the ventilation pipes (3) is slidably connected to a rotating connector (9) on its outer periphery. The inner wall of the rotating connector (9) is fitted with a threaded cleaning brush (10) for cleaning. The rotating connector (9) rotates inside the cleaning frame (4) via a rotating shaft (8).

2. The low-nitrogen combustion machine for a gas boiler according to claim 1, characterized in that, A limiting rod (7) is inserted through the insertion hole and the threaded hole (6) on the surface of the extension plate (5), and the top end of the limiting rod (7) is provided with a thread for screwing into the threaded hole (6) for locking.

3. The low-nitrogen combustion machine for a gas boiler according to claim 1, characterized in that, Each of the ventilation pipes (3) is fitted to the side wall of the combustion liner (11) at the end away from the cleaning base (1), and the combustion liner (11) is fitted with an air inlet pipe (13) at the end away from the ventilation pipe (3).

4. The low-nitrogen combustion machine for a gas boiler according to claim 1, characterized in that, The cleaning base (1) is equipped with an exhaust pipe (12) at the end away from the ventilation pipe (3).

5. The low-nitrogen combustion machine for a gas boiler according to claim 3, characterized in that, The combustion chamber (11) is internally equipped with a multi-way pipe for connecting the ventilation pipe (3) and the air intake pipe (13).

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