A wall-hanging stove gas premixer structure

Abstract

This utility model relates to the field of combustion heat exchange technology and discloses a gas premixer structure for a wall-hung boiler. It includes an outer cavity one, an outer cavity two fixedly connected to the inner wall of the outer cavity one, a sealing ring one detachably connected to the outer wall of the outer cavity two, a baffle fixedly connected to the outer wall of the sealing ring one, an air nozzle fixedly connected to the inner wall of the baffle, a ventilation mesh fixedly connected to the outer wall of the air nozzle, a Venturi tube fixedly connected to the outer wall of the ventilation mesh, a limit strip fixedly connected to the outer wall of the Venturi tube, and the sealing ring two fixedly connected to the outer wall of the Venturi tube. A gas nozzle is provided on the inner wall of the outer cavity two. In this utility model, the improved premixer structure addresses the problem of gas-air stratification in traditional premixers, improves the uniformity of the mixed gas, enhances the stability of the low-fire combustion of the wall-hung boiler, and improves the thermal efficiency of the wall-hung boiler.

Description

Technical Field

[0001] This utility model relates to the field of combustion heat exchange technology, and in particular to a structure of a gas premixer for a wall-hung boiler. Background Technology

[0002] A premixed gas structure for wall-hung boilers is a combustion technology applied to gas boilers. It refers to the pre-mixing of gas and air in a fixed ratio before the gas enters the burner. This ensures that the mixed gas maintains the optimal air-fuel ratio for combustion, improving combustion stability and increasing boiler efficiency. This device that mixes gas and air is called a premixer. This premixing method can precisely control the air-fuel ratio, avoiding incomplete combustion caused by uneven mixing of gas and air. It can improve energy utilization, reduce energy consumption, and reduce emissions of harmful gases such as carbon monoxide. At the same time, it makes the combustion flame more stable and the heating efficiency higher, meeting the needs of wall-hung boilers for efficient, clean, and safe operation.

[0003] A typical structure of a wall-hung boiler gas premixer consists of a gas inlet, an air inlet, a mixing chamber, mixing blades, a flow guide device, and an outlet. The gas inlet is connected to the gas pipeline and is used to introduce gas. The air inlet is responsible for drawing in the air required for combustion. The mixing chamber is the core space for mixing gas and air. The mixing blades can disrupt the airflow, enhance the turbulence of gas and air, and promote uniform mixing. The flow guide device can regulate the flow direction of the mixed gas. The outlet delivers the mixed gas to the burner of the wall-hung boiler to provide conditions for combustion.

[0004] In existing technologies, the premixers of traditional fully premixed wall-hung boilers are usually single-channel Venturi type. They draw air into the mixing chamber through negative pressure generated by a fan. At the same time, the air generates a Venturi effect in the premixer and draws in gas. After being stirred and mixed by the fan, the gas is sent to the burner. In this type of premixer, the Venturi inlet is close to the fan and the gas nozzle is large. It cannot be fully mixed with the air before entering the fan, which easily causes gas-air stratification and leads to unstable combustion. Therefore, a new gas premixer structure for wall-hung boilers is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a gas premixer structure for wall-hung boilers, aiming to improve the problem of gas-air stratification and unstable combustion caused by the single-channel Venturi type in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A gas premixer structure for a wall-hung boiler includes an outer cavity one, an outer cavity two fixedly connected to the inner wall of the outer cavity one, a sealing ring one detachably connected to the outer wall of the outer cavity two, a barrier fixedly connected to the outer wall of the sealing ring one, an air nozzle fixedly connected to the inner wall of the barrier, a ventilation mesh fixedly connected to the outer wall of the air nozzle, a venturi inner tube fixedly connected to the outer wall of the ventilation mesh, a limit strip fixedly connected to the outer wall of the venturi inner tube, a sealing ring two fixedly connected to the outer wall of the venturi inner tube, a gas nozzle opened on the inner wall of the outer cavity two, and a limiting component for limiting the position of the air nozzle on the outer wall of the barrier;

[0008] As a further description of the above technical solution:

[0009] The limiting component includes a support rod, the outer walls of multiple support rods are fixedly connected to the inner wall of the enclosure, a torsion spring is sleeved on the outer wall of the support rod, a limiting block is rotatably connected to the outer wall of the support rod, and a shock-absorbing plate is fixedly connected to the outer wall of the torsion spring.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the limiting strip is detachably connected to the inner wall of the second outer cavity, and the outer wall of the second sealing ring is detachably connected to the inner wall of the first outer cavity.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the torsion spring is fixedly connected to the outer wall of the limiting block, and the outer walls of the plurality of shock-absorbing plates are fixedly connected to the outer wall of the enclosure.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the enclosure is fixedly connected to multiple support blocks, and a spring is fixedly connected to the left side of each support block.

[0016] As a further description of the above technical solution:

[0017] The inner wall of the enclosure is provided with multiple grooves, and a lever is fixedly connected to the left side of the spring. The outer wall of the lever is slidably connected to the inner wall of the groove.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the lever is fixedly connected to a limiting post, and the outer wall of the limiting post is detachably connected to the inner wall of the limiting block.

[0020] As a further description of the above technical solution:

[0021] A gas pipe is fixedly connected to the bottom end of the first outer cavity, and a gas chamber is formed on the inner wall of the second outer cavity.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, a venturi inner tube is set inside the premixer, which forms a gas chamber with the outer cavity. The gas is sprayed out from the narrow slit of the ventilation grid outside the venturi inner tube through the gas nozzle. After the premixer is structurally improved, the problem of gas and air stratification in traditional premixers is improved, the uniformity of the mixed gas is improved, the small flame combustion stability of the wall-hung boiler is improved, the thermal efficiency of the wall-hung boiler is improved, and the sealing performance of the equipment is also improved.

[0024] 2. In this utility model, the limiting component is fixed to the inner wall of the enclosure by the support rod, providing a support fulcrum for the torsion spring and the limiting block. The torsion spring uses elastic torque to keep the limiting block against the outer wall of the outer cavity, fixing the position of the air nozzle and preventing it from shifting under the impact of airflow, ensuring a stable air-gas mixing ratio. At the same time, the limiting can be easily released when maintenance is required, ensuring the long-term reliable operation of the premixer. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the structure of a gas premixer for a wall-hung boiler proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the outer cavity of a gas premixer structure for a wall-mounted boiler proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the air nozzle structure of a gas premixer for a wall-mounted boiler proposed in this utility model;

[0028] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0030] Legend:

[0031] 1. Outer cavity one; 2. Outer cavity two; 3. Sealing ring one; 4. Enclosure; 5. Air nozzle; 6. Ventilation mesh; 7. Venturi tube; 8. Limiting strip; 9. Sealing ring two; 10. Gas nozzle; 11. Support rod; 12. Torsion spring; 13. Limiting block; 14. Shock absorber; 15. Supporting block; 16. Spring; 17. Groove; 18. Lever; 19. Limiting post; 20. Gas pipe; 21. Gas chamber. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides an embodiment: the premixer is designed with a Venturi tube 7 inside, which is sealed to the premixer outer cavity by two sealing rings. The cavity between the sealing rings is the gas chamber 21. The gas chamber 21 is designed with a special gas passage. A ring of baffle 4 is set outside the air nozzle 5, so that the gas can only be sprayed out from the narrow slit outside the Venturi tube. The narrow slit is the ventilation mesh 6. Under the action of the Venturi effect, the air and gas can be fully mixed in the premixer, ensuring the uniformity of the mixed gas. It includes an outer cavity 1. The inner wall of the outer cavity 1 is fixedly connected to an outer cavity 2. The outer cavity 1 is the outer main structure of the premixer, providing installation space for the internal components. Its inner wall is fixed to the outer cavity 2 to form a double cavity, separating the transmission path of gas and air. The outer wall of the outer cavity 2 is detachably connected to a sealing ring 3. The sealing ring 3 is used to seal the connection between the outer cavity 2 and the baffle 4 to prevent gas leakage and facilitate disassembly and maintenance.

[0034] A baffle 4 is fixedly connected to the outer wall of the sealing ring 3. The baffle 4 provides the installation base for the sealing ring 3. The baffle 4 is fixed to the outer wall of the sealing ring 3. The baffle 4 is annular and surrounds the air nozzle 5. It is used to limit the position of the air nozzle 5 and guide the air flow to the venturi inner tube 7. The air nozzle 5 is fixedly connected to the inner wall of the baffle 4. The air nozzle 5 is the inlet for air to enter the premixer. It is fixed to the inner wall of the baffle 4 and is used to introduce the air flow required for combustion. A ventilation grid 6 is fixedly connected to the outer wall of the air nozzle 5. The ventilation grid 6 covers the outside of the air nozzle 5. It evenly disperses the gas flow through the fine grid structure and filters impurities in the gas to ensure the purity of the intake air. A venturi inner tube 7 is fixedly connected to the outer wall of the ventilation grid 6. The venturi inner tube 7 is tubular and fixed to the outside of the ventilation grid 6. It forms a venturi channel inside. It uses the negative pressure generated when the air flows to draw in the gas and promote the mixing of gas and air.

[0035] A limiting strip 8 is fixedly connected to the outer wall of the Venturi inner tube 7. The limiting strip 8 is fixed to the outer wall of the Venturi inner tube 7 and cooperates with the corresponding structure of the inner wall of the outer cavity 2 to limit the axial and circumferential displacement of the Venturi inner tube 7 and ensure its accurate installation position. A sealing ring 2 9 is fixedly connected to the outer wall of the Venturi inner tube 7. The sealing ring 2 9 is fixed to the outer wall of the Venturi inner tube 7 and is sealed to the inner wall of the outer cavity 1 to further prevent the gas from leaking to the outside before it is mixed. A gas nozzle 10 is opened on the inner wall of the outer cavity 2. The gas nozzle 10 connects the gas chamber 21 inside the outer cavity 2 with the space outside the Venturi inner tube 7. The gas is injected into the negative pressure area formed by the Venturi effect through this point and mixes with the air. The outer wall of the enclosure 4 is provided with a limiting component for limiting the position of the air nozzle 5. The limiting component fixes the air nozzle 5 through a mechanical structure to prevent it from being displaced under the impact or vibration of the airflow and to ensure the stability of the mixing effect of the premixer.

[0036] Reference Figure 3 and Figure 5 The limiting component includes support rods 11. The outer walls of multiple support rods 11 are fixedly connected to the inner wall of the enclosure 4. The support rods 11 serve as the supporting structure of the limiting component and are fixed to the inner wall of the enclosure 4, providing mounting points for the torsion springs 12 and the limiting block 13. The outer wall of the support rods 11 is fitted with torsion springs 12. The torsion springs 12 are fitted on the outside of the support rods 11, with one end connected to the limiting block 13 and the other end connected to the enclosure 4. The elastic torque is used to keep the limiting block 13 in a limiting state against the air nozzle 5.

[0037] The outer wall of the support rod 11 is rotatably connected to the limiting block 13. The limiting block 13 is rotatably connected to the support rod 11 and can swing around the support rod 11. The position is limited by abutting against the outer wall of the outer cavity 2. The outer wall of the torsion spring 12 is fixedly connected to the damping plate 14. The damping plate 14 is connected to the torsion spring 12. It absorbs the vibration generated by the air flow through its own flexible deformation, reduces the shaking of the limiting component, and improves the structural stability.

[0038] Reference Figure 4 and Figure 5The outer wall of the limiting strip 8 is detachably connected to the inner wall of the outer cavity 2, and the outer wall of the sealing ring 2 9 is detachably connected to the inner wall of the outer cavity 1. Both the limiting strip 8 and the sealing ring 2 9 are detachably connected, which facilitates the installation, disassembly and maintenance of the Venturi inner tube 7, while ensuring sealing performance. The outer wall of the torsion spring 12 is fixedly connected to the outer wall of the limiting block 13, and the outer walls of multiple damping plates 14 are fixedly connected to the outer wall of the enclosure 4. The torsion spring 12 is directly fixed to the limiting block 13 to ensure effective transmission of elastic force. The damping plate 14 is fixed to the enclosure 4, and the vibration buffering effect is enhanced through rigid connection. Multiple support blocks 15 are fixedly connected to the inner wall of the enclosure 4. A spring 16 is fixedly connected to the left side of the support block 15. The support block 15 is fixed to the inner wall of the enclosure 4 to provide a fixed end for the spring 16. The spring 16 pushes the lever 18 through elastic extension and contraction to assist the connection between the limiting post 19 and the limiting block 13.

[0039] The inner wall of the enclosure 4 has multiple grooves 17, which provide a sliding track for the lever 18. The lever 18 is fixedly connected to the left side of the spring 16. The outer wall of the lever 18 is slidably connected to the inner wall of the groove 17. The spring 16 pushes the lever 18 to move along the groove 17, thereby locking or unlocking the limiting post 19 and the limiting block 13. The outer wall of the lever 18 is fixedly connected to the limiting post 19. The outer wall of the limiting post 19 is detachably connected to the inner wall of the limiting block 13. The limiting post 19 cooperates with the limiting hole of the limiting block 13. When the lever 18 slides, the limiting post 19 inserts into or disengages from the limiting block 13, thereby fixing or releasing the position of the limiting block 13.

[0040] Reference Figure 1 and Figure 2 A gas pipe 20 is fixedly connected to the bottom of the outer cavity 1. The gas pipe 20 is connected to an external gas source. A gas chamber 21 is opened on the inner wall of the outer cavity 2. The gas pipe 20 delivers gas to the gas chamber 21 inside the outer cavity 2. The gas is sprayed out through the gas nozzle 10 and mixed with air.

[0041] Working principle: The gas pipe 20 fixed at the bottom of the outer cavity 1 is connected to an external gas source. The gas is transported to the outer space of the Venturi inner tube 7 through the gas pipe 20. At the same time, air enters the Venturi inner tube 7 from the air nozzle 5. The gas outside the Venturi inner tube 7 is ejected through the gas nozzle 10. The gas enters the interior of the Venturi inner tube 7 from the gas nozzle 10 through the ventilation grid 6. At this time, the mixing operation of gas and air is completed.

[0042] When the air nozzle 5 needs to be limited, the torsion spring 12 supports the limiting block 13 to keep it in a vertical state. At this time, the spring 16 on the inner wall of the enclosure 4 provides a pushing force to the support block 15, pushing the lever 18 to slide to the left along the groove 17, so that the limiting post 19 is inserted into the limiting hole of the limiting block 13. At this time, the outer surface of the limiting block 13 is in close contact with the enclosure 4, and the limiting block 13 is in close contact with the outer cavity 2, thereby fixing the position of the air nozzle 5 and preventing its axial movement. When the air nozzle 5 needs to be disassembled, the lever 18 is moved to the right. At this time, the spring 16 is compressed, the limiting post 19 is disengaged from the limiting hole of the limiting block 13, and the locking of the limiting block 13 is released. At the same time, the limiting block 13 is manually pressed to rotate inward around the support rod 11, compressing the torsion spring 12. The venturi inner tube 7 is pulled out backward, and the limiting block 13 is disengaged from the outer cavity 2. At this time, the air nozzle 5 loses its limiting constraint and can be disassembled.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A wall-hanging stove gas premixer structure comprising an outer cavity (1), characterized in that: The inner wall of the outer cavity one (1) is fixedly connected to the outer cavity two (2). The outer wall of the outer cavity two (2) is detachably connected to the sealing ring one (3). The outer wall of the sealing ring one (3) is fixedly connected to the enclosure (4). The inner wall of the enclosure (4) is fixedly connected to the air nozzle (5). The outer wall of the air nozzle (5) is fixedly connected to the ventilation grid (6). The outer wall of the ventilation grid (6) is fixedly connected to the venturi inner tube (7). The outer wall of the venturi inner tube (7) is fixedly connected to the limit strip (8). The outer wall of the venturi inner tube (7) is fixedly connected to the sealing ring two (9). The inner wall of the outer cavity two (2) is provided with a gas nozzle (10). The outer wall of the enclosure (4) is provided with a limiting component for limiting the position of the air nozzle (5).

2. The structure of a gas premixer of a wall-mounted boiler according to claim 1, characterized in that: The limiting component includes a support rod (11), the outer walls of multiple support rods (11) are fixedly connected to the inner wall of the enclosure (4), a torsion spring (12) is sleeved on the outer wall of the support rod (11), a limiting block (13) is rotatably connected to the outer wall of the support rod (11), and a shock-absorbing plate (14) is fixedly connected to the outer wall of the torsion spring (12).

3. The structure of a gas premixer of a wall-mounted heater according to claim 1, characterized in that: The outer wall of the limiting strip (8) is detachably connected to the inner wall of the outer cavity two (2), and the outer wall of the sealing ring two (9) is detachably connected to the inner wall of the outer cavity one (1).

4. The structure of a gas premixer of a wall-mounted heater according to claim 2, wherein: The outer wall of the torsion spring (12) is fixedly connected to the outer wall of the limiting block (13), and the outer walls of the plurality of damping plates (14) are fixedly connected to the outer wall of the enclosure (4).

5. The structure of a gas premixer for a wall-hung boiler according to claim 2, characterized in that: The inner wall of the enclosure (4) is fixedly connected with a plurality of support blocks (15), and a spring (16) is fixedly connected to the left side of the support block (15).

6. The structure of a gas premixer of a wall-mounted heater according to claim 5, wherein: The inner wall of the enclosure (4) is provided with a plurality of grooves (17), and a lever (18) is fixedly connected to the left side of the spring (16). The outer wall of the lever (18) is slidably connected to the inner wall of the groove (17).

7. The structure of a gas premixer of a wall-mounted heater according to claim 6, wherein: The outer wall of the lever (18) is fixedly connected to a limiting post (19), and the outer wall of the limiting post (19) is detachably connected to the inner wall of the limiting block (13).

8. The structure of a gas premixer for a wall-hanging stove according to claim 1, wherein: A gas pipe (20) is fixedly connected to the bottom end of the outer cavity one (1), and a gas chamber (21) is opened on the inner wall of the outer cavity two (2).

Images