A burner for a gas wall-hung boiler

Abstract

The application relates to the technical field of burners, in particular to a gas wall-hanging stove burner which comprises a rear mounting frame, a Venturi tube mounted on the front side of the rear mounting frame, a front mounting frame connected to the front side of the Venturi tube, a temporary storage frame fixed to the front side of the front mounting frame, and a fire grate type combustion head mounted above the Venturi tube. When the rotating rod drives the convex column to rotate, the convex column intermittently applies downward thrust to the convex block, so that the convex block drives the piston assembly to reciprocatingly and intermittently ascend and descend in the gas storage pipe, so that the piston assembly reciprocatingly sucks the gas and air in the main pipe into the gas storage pipe, and then discharges the gas and air in the gas storage pipe, so that the gas and air with a good ratio are fully premixed, the sufficiency of the later combustion is improved, the waste gas emission is reduced, the gas usage is reduced, and the energy-saving and gas-saving effects are well realized.

Description

Technical Field

[0001] This invention relates to the field of burner technology, specifically to a burner for a gas-fired wall-hung boiler. Background Technology

[0002] Gas-fired wall-hung boilers are devices that provide heating and domestic hot water services for homes or commercial spaces. Electric heaters consume a lot of electricity and have limited heating effects. Gas-fired wall-hung boilers are widely used in various fields due to their high efficiency, energy saving, and temperature control, and can meet the needs of different scenarios. The burner is the core component of a gas-fired wall-hung boiler, which is mainly used to mix gas with air and ignite it to generate heat to heat the water.

[0003] For example, the patent titled "A Novel Burner" disclosed in the prior art with the publication number "CN216667669U" discloses that the burner has a flat, disc-shaped flame plate with a flat combustion surface, which ensures complete combustion and uniform flame temperature diffusion. The burner plate is made of honeycomb ceramic sheets, which have better high-temperature resistance than stainless steel woven mesh burner plates. It is also less prone to deformation during tempering and has good stability. The edges of the burner plate are protected by a protective ring to prevent damage to the honeycomb ceramic sheets caused by accidental impact. The insulation board is connected via a plug-in method using slots, facilitating easy installation and disassembly. The inner baffle, being higher than the outer baffle, allows for quick positioning of the insulation board's inner wall. Furthermore, the increased height of the inner baffle near the handle facilitates rapid alignment of the insulation board towards the handle during installation, improving installation efficiency. Similarly, the prior art patent with publication number "CN208886768U," entitled "A Low-NOx Burner for a Wall-Mounted Boiler," discloses a main board, bracket, and burner. The burner is located on the upper part of the main board, and the support is located on the front and rear sides of the main board. The lower part of the main board is provided with an injection port. The pre-mixed gas and air enter the burner through the injection port. The bottom of the burner is provided with an air baffle. The gas introduced through the injection port is regulated by an air regulating belt before entering each burner. The air regulating belt is a smooth, variable cross-section cavity. The gas entering the air regulating belt is rapidly dispersed in its cavity. Because the cavity has a variable cross-section structure, the gas enters from one end of the air regulating belt and flows from the narrow end to the wide end of its cavity. This structure makes the airflow pressure stable and evenly dispersed, and finally enters the burner above it.

[0004] In the aforementioned prior art burners, the pre-mixed gas and air are directly introduced into the burner through the injection port. Because this pre-mixing process fails to adequately mix the gas and air, the uniformity and efficiency of the mixture entering the gas regulating zone are poor. This affects the completeness of combustion, leading to increased gas consumption and hindering the achievement of energy and gas-saving effects. Therefore, we propose a burner for gas-fired wall-hung boilers to address the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a burner for a gas-fired wall-hung boiler, which solves the problem mentioned in the background art that existing burners directly introduce pre-mixed gas and air into the burner through the injection port. This method fails to adequately pre-mix the gas and air, resulting in poor uniformity and slow mixing efficiency of the gas and air entering the gas regulating zone. Consequently, it affects the completeness of combustion, leading to increased gas consumption and failing to achieve energy-saving and gas-saving effects.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a burner for a gas wall-hung boiler, comprising a rear mounting bracket and a venturi tube mounted on its front side, wherein the front side of the venturi tube is connected to the front mounting bracket, a temporary storage frame is fixed to the front side of the front mounting bracket, and a burner head of the venturi tube is mounted above the venturi tube. A main pipe is fixed to the bottom of the temporary storage frame, and a premixing mechanism is installed inside the main pipe. An air injection pipe is connected to the lower left side of the main pipe, and a gas injection pipe is connected to the lower right side of the main pipe. A rotating rod is rotatably mounted through the interior of the temporary storage frame, and convex posts are symmetrically mounted on the outer side of the rotating rod in the middle of the temporary storage frame. The premixing mechanism includes a gas storage pipe mounted inside the main pipe through a fixing bracket, and a piston assembly is fitted inside the gas storage pipe. The upper surface of the piston assembly penetrates the upper surface of the gas storage pipe, and a protrusion is fixed to the top of the piston assembly. A protrusion post is provided above the protrusion. A return spring is nested and connected to the outer side of the piston assembly. Through holes are provided on the lower outer side and bottom surface of the gas storage pipe.

[0007] Preferably, the rear mounting bracket has a threaded rod connected by symmetrical through-threaded connections inside.

[0008] Preferably, the venturi tube has an air inlet on its front side and a rear fixing hole on its rear side, and a front fixing hole on its front side.

[0009] Preferably, a first plug rod is inserted through the front fixing hole, and a second plug rod is inserted through the rear fixing hole, and the rear side of the second plug rod is threadedly connected to the front end of the threaded rod.

[0010] Preferably, the rear side of the temporary storage frame is provided with equal-spaced interface plates, and the interior of the front mounting bracket is provided with equal-spaced connectors, the rear side of the connectors being connected to the air intake, and the front side of the connectors being connected to the interface plates. An ignition electrode is installed on the top of the front mounting bracket.

[0011] Preferably, an agitator blade is mounted on the outer side of the rotating rod.

[0012] Preferably, the length of the protruding post is greater than the shortest distance between the protrusion and the rotating rod, and the protrusion forms a reciprocating lifting structure through the protruding post.

[0013] Preferably, a gathering funnel is installed in the main pipe located below the gas storage pipe, and a gas injection pipe and an air injection pipe are provided below the gathering funnel, and the upper diameter of the gathering funnel is smaller than the lower diameter of the gathering funnel.

[0014] Preferably, a preheating chamber is fixed through the outer side of the air injection pipe, and the preheating chamber is filled with flue gas generated by the gas-fired wall-hung boiler.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the burner for the gas wall-hung boiler can premix the pre-mixed gas and air thoroughly, which facilitates better combustion in the later stage, reduces exhaust emissions, and lowers gas consumption, thus achieving excellent energy-saving and gas-saving effects. The specific details are as follows:

[0016] When the rotating rod drives the convex column to rotate, the convex column intermittently applies a downward thrust to the convex block, which in turn causes the convex block to drive the piston assembly to intermittently reciprocate up and down in the gas storage pipe. This causes the piston assembly to reciprocate to draw the gas and air in the main pipe into the gas storage pipe and then discharge the gas and air in the gas storage pipe. This repeated operation can fully premix the well-mixed gas and air, which can improve the completeness of combustion in the later stage, reduce exhaust emissions, and reduce gas consumption. Therefore, it can effectively achieve energy saving and gas saving.

[0017] Furthermore, by rotating the rod to drive the agitator to rotate, the agitator can further agitate the premixed gas and air in the storage frame. This not only further improves the uniformity and completeness of the premixing, but also facilitates the flow of the gas and makes it easier for the gas to be evenly distributed in the storage frame, so that the mixed gas can be evenly entered into the Venturi tube for further mixing later.

[0018] The flue gas generated by the gas wall-hung boiler is transported to the preheating chamber, and then the low-temperature controllable waste heat is used to preheat the air injected into the pipe. This can accelerate the ignition speed and combustion reaction rate of the fuel, and make the combustion more complete, thereby improving the combustion efficiency, saving fuel, and achieving the effect of gas saving and energy saving.

[0019] By connecting the threaded rod to the second plug rod, a row of venturi tubes can be stably installed on the rear mounting bracket, which facilitates the later centralized cleaning of the burner heads on the row of venturi tubes and avoids the multiple burner heads in the row being scattered and affecting the later cleaning operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0022] Figure 3 This is a schematic diagram of the front mounting bracket structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the separation structure of the front mounting bracket and the venturi tube of the present invention;

[0024] Figure 5 This is a partial cross-sectional view of the venturi tube and the second connector rod of the present invention.

[0025] Figure 6 This is a schematic diagram of the main cross-sectional structure of the temporary storage frame of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle;

[0027] Figure 8 This is a schematic cross-sectional view of the gas storage pipe of the present invention;

[0028] Figure 9 This is a schematic cross-sectional view of the preheating cavity structure of the present invention.

[0029] In the diagram: 1. Venturi tube; 101. Air inlet; 102. Rear mounting hole; 103. Front mounting hole; 2. Rear mounting bracket; 201. Threaded rod; 3. Front mounting bracket; 31. Connector; 4. Temporary storage frame; 41. Interlocking interface; 5. Ignition electrode; 6. Main pipe; 7. Gas injection pipe; 8. Air injection pipe; 9. Burner head; 10. First connector rod; 11. Second connector rod; 12. Rotating rod; 121. Stirring blade; 122. Protrusion; 13. Gas storage pipe; 131. Mounting bracket; 132. Through hole; 14. Gathering funnel; 15. Piston assembly; 151. Protrusion; 152. Return spring; 16. Preheating chamber. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-9 The present invention provides the following technical solution:

[0032] Example 1: The burner of the gas-fired wall-hung boiler in this example can premix the pre-mixed gas and air to improve the completeness of combustion, thereby reducing exhaust emissions and gas consumption. This effectively achieves energy saving and gas conservation. See attached diagram for the specific structure. Figures 1-8 As shown, a rear mounting bracket 2 and a venturi tube 1 mounted on its front side are arranged, with a front mounting bracket 3 connected to the front side of the venturi tube 1. A temporary storage frame 4 is fixed to the front side of the front mounting bracket 3, and a burner head 9 is mounted above the venturi tube 1. A main pipe 6 is fixed to the bottom of the temporary storage frame 4, and a premixing mechanism is installed inside the main pipe 6. An air injection pipe 8 is connected to the lower left side of the main pipe 6, and a gas injection pipe 7 is connected to the lower right side of the main pipe 6. A rotating rod 12 is rotatably mounted through the interior of the temporary storage frame 4, and protrusions 122 are symmetrically mounted on the outer side of the rotating rod 12 in the middle of the temporary storage frame 4. The premixing mechanism includes a gas storage pipe 13 mounted inside the main pipe 6 via a fixing bracket 131, and a piston assembly 15 is fitted inside the gas storage pipe 13. The upper surface of the piston assembly 15 extends through the upper surface of the gas storage pipe 13, and a protrusion 151 is fixed to the top of the piston assembly 15. A protrusion 151 is provided above the protrusion 151. 22. A return spring 152 is nested on the outer side of the piston assembly 15. Through holes 132 are opened on the lower outer side and bottom surface of the gas storage pipe 13. Threaded rods 201 are symmetrically threaded through the interior of the rear mounting bracket 2. An air inlet 101 is opened inside the front side of the venturi tube 1, and a rear fixing hole 102 is opened inside the rear side of the venturi tube 1. A front fixing hole 103 is opened inside the front side of the venturi tube 1. A first plug rod 10 is inserted through the front fixing hole 103, and a second plug rod 11 is inserted through the rear fixing hole 102. The rear side of the second plug rod 11 is threadedly connected to the front end of the threaded rod 201. The rear side of the temporary storage frame 4 is equipped with equal-spaced interface 41. Connectors 31 are installed at equal-spaced intervals inside the front mounting bracket 3. The rear side of the connector 31 is connected to the air inlet 101, and the front side of the connector 31 is connected to the interface 41. An ignition electrode 5 is installed on the top of the front mounting bracket 3.

[0033] A stirring blade 121 is installed on the outside of the rotating rod 12. The length of the protrusion 122 is greater than the shortest distance between the protrusion 151 and the rotating rod 12. The protrusion 151 forms a reciprocating lifting structure through the protrusion 122. A gathering funnel 14 is installed in the main pipe 6 below the gas storage pipe 13. A gas injection pipe 7 and an air injection pipe 8 are provided below the gathering funnel 14. The upper diameter of the gathering funnel 14 is smaller than the lower diameter of the gathering funnel 14.

[0034] The rear mounting bracket 2 and front mounting bracket 3 inside the burner are installed in the combustion chamber of the gas wall-hung boiler using screws. Then, the blower and gas valve inside the gas wall-hung boiler are turned on, allowing a certain proportion of air to be delivered to the main pipe 6 through the air injection pipe 8, and a certain proportion of gas to be delivered to the main pipe 6 through the gas injection pipe 7. Next, the air and gas are first delivered upwards through the collecting funnel 14. At this time, the right end of the rotating rod 12 is connected to an external motor via a coupling. The motor drives the rotating rod 12 to rotate, which in turn drives the two sets of protrusions 122 to rotate. When the protrusions 122 rotate to contact the protrusions 151, they apply a downward thrust to the protrusions 151, causing the protrusions 151 to drive the piston assembly 15 downwards. At this time, the piston assembly 15... The gas in the gas storage pipe 13 is pushed into the main pipe 6 through the through hole 132, which facilitates the pneumatic agitation of the gas in the main pipe 6. At this time, the return spring 152 stores energy. When the protrusion 122 rotates to separate from the protrusion 151, the stored energy of the return spring 152 automatically drives the piston assembly 15 to move upward and reset. Then, the piston assembly 15 generates a certain suction force in the gas storage pipe 13, which causes the gas in the main pipe 6 to enter the gas storage pipe 13 through the through hole 132. This operation is repeated to fully premix the proportioned gas and air, which facilitates the completeness of combustion in the later stage, reduces exhaust emissions, and reduces the amount of gas used. Therefore, it can effectively achieve the effects of energy saving and gas saving. Then, the premixed gas enters the temporary storage frame 4 through the main pipe 6.

[0035] Meanwhile, the rotating rod 12 drives the stirring blade 121 to rotate, which further agitates the premixed gas and air in the temporary storage frame 4. This not only further improves the uniformity and sufficiency of the premixing, but also facilitates the flow of the gas and makes it easier for the gas to be evenly distributed in the temporary storage frame 4. Then, the premixed gas in the temporary storage frame 4 enters the air inlet 101 through the interface 41 and the connector 31. After being evenly mixed again in the venturi tube 1, the gas is discharged through the combustion hole in the burner head 9. At this time, the ignition electrode 5 is activated, and the ignition electrode 5 discharges to ignite the gas, thereby forming a uniform and stable blue flame. The flame directly heats the main heat exchanger and transfers the heat to the water flowing through the heat exchanger, thereby achieving heating or providing domestic hot water. Since this part is existing technology, it will not be described in detail here.

[0036] By connecting the threaded rod 201 to the second plug rod 11, a row of venturi tubes 1 can be stably installed on the rear mounting bracket 2, which facilitates the later centralized cleaning of the flame burner heads 9 on the row of venturi tubes 1, and avoids the multiple flame burner heads 9 in a row being scattered and affecting the later cleaning operation.

[0037] Example 2: The burner for the gas-fired wall-hung boiler in this example, based on Example 1, can preheat air at a low temperature, thereby improving combustion efficiency and saving fuel, thus achieving gas-saving and energy-saving effects. The specific structure is shown in the attached diagram. Figure 9 As shown, a preheating chamber 16 is fixed through the outer side of the air injection pipe 8, and flue gas generated by the gas wall-hung boiler is injected into the preheating chamber 16.

[0038] During operation, the flue gas generated in the gas-fired wall-hung boiler is transported to the preheating chamber 16 through a pipeline. Then, the low-temperature controllable waste heat is used to preheat the air injected into the air pipe 8. This can accelerate the ignition speed and combustion reaction rate of the fuel, resulting in more complete combustion, thereby improving combustion efficiency and saving fuel. This achieves the effects of gas saving and energy saving, thus completing a series of tasks.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A burner for a gas-fired wall-hung boiler, comprising a rear mounting bracket (2) and a venturi tube (1) mounted on its front side, wherein a front mounting bracket (3) is connected to the front side of the venturi tube (1), characterized in that: A temporary storage frame (4) is fixed to the front side of the front mounting bracket (3), and a burner head (9) is installed above the venturi tube (1). A main pipe (6) is fixed to the bottom of the temporary storage frame (4), and a premixing mechanism is installed inside the main pipe (6). An air injection pipe (8) is connected to the lower left side of the main pipe (6), and a gas injection pipe (7) is connected to the lower right side of the main pipe (6). A rotating rod (12) is rotatably installed through the interior of the temporary storage frame (4), and convex posts (122) are symmetrically installed on the outer side of the rotating rod (12) in the middle of the temporary storage frame (4). The premixing mechanism includes a gas storage pipe (13) installed inside the main pipe (6) by a fixing frame (131), and a piston assembly (15) is attached to the inside of the gas storage pipe (13). The piston assembly (15) extends through the upper surface of the gas storage pipe (13), and a protrusion (151) is fixed at the top of the piston assembly (15). A protruding post (122) is provided above the protrusion (151). A return spring (152) is nested on the outside of the piston assembly (15). Through holes (132) are provided on the lower outer side and bottom surface of the gas storage pipe (13).

2. The burner for a gas-fired wall-hung boiler according to claim 1, characterized in that: The rear mounting bracket (2) has a threaded rod (201) connected internally by a symmetrical through thread.

3. The burner for a gas-fired wall-hung boiler according to claim 2, characterized in that: The venturi tube (1) has an air inlet (101) inside the front side, a rear fixing hole (102) inside the rear side, and a front fixing hole (103) inside the front side.

4. A burner for a gas-fired wall-hung boiler according to claim 3, characterized in that: A first plug rod (10) is inserted through the front fixing hole (103), and a second plug rod (11) is inserted through the rear fixing hole (102), and the rear side of the second plug rod (11) is threadedly connected to the front end of the threaded rod (201).

5. A burner for a gas-fired wall-hung boiler according to claim 1, characterized in that: The temporary storage frame (4) has a docking interface (41) installed at equal intervals on its rear side, and the front mounting bracket (3) has a connector (31) installed at equal intervals inside, and the rear side of the connector (31) is connected to the air inlet (101), and the front side of the connector (31) is connected to the docking interface (41). An ignition electrode (5) is installed on the top of the front mounting bracket (3).

6. A burner for a gas-fired wall-hung boiler according to claim 1, characterized in that: A stirring blade (121) is installed on the outside of the rotating rod (12).

7. A burner for a gas-fired wall-hung boiler according to claim 1, characterized in that: The length of the protruding post (122) is greater than the shortest distance between the protrusion (151) and the rotating rod (12), and the protrusion (151) forms a reciprocating lifting structure through the protruding post (122).

8. A burner for a gas-fired wall-hung boiler according to claim 1, characterized in that: A gathering funnel (14) is installed in the main pipe (6) located below the gas storage pipe (13), and a gas injection pipe (7) and an air injection pipe (8) are provided below the gathering funnel (14), and the upper diameter of the gathering funnel (14) is smaller than the lower diameter of the gathering funnel (14).

9. A burner for a gas-fired wall-hung boiler according to claim 1, characterized in that: The air injection pipe (8) has a preheating chamber (16) fixed through its outer side, and the preheating chamber (16) is filled with flue gas generated by the gas wall-hung boiler.

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