Anti-backflow smoke exhaust mechanism for gas water heater

Abstract

The utility model discloses a smoke exhaust mechanism for an anti-backflow type gas water heater, which comprises a bent pipe, one end of the bent pipe is fixedly communicated with a connector, the other end of the bent pipe is fixedly communicated with a straight pipe, and the smoke exhaust mechanism further comprises an anti-backflow assembly arranged in the middle of the straight pipe. The first valve plate, the second valve plate and the third valve plate are sequentially sleeved from outside to inside and are concentrically arranged, and the three sets of valve plates are rotationally arranged on the rotating shaft in a sleeving mode; rolling wheels are installed on the two sides of the same radial section of the three sets of valve plates, stop grooves matched with the rolling wheels are formed in the valve plates adjacent to the rolling wheels and the straight pipe, and the stop grooves located in the two sides of the rotating shaft are of a central symmetry structure. According to the gas water heater, in the strong wind weather, wind force acts on the local position, close to the left side, of the valve plate in a concentrated mode, the strong wind pushes the valve plate to reset from the outside till the idler wheel enters the stop groove and cannot be pushed, closing of the valve plate is achieved, and smoke is prevented from flowing back into the gas water heater.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust mechanisms, in particular to a smoke exhaust mechanism for an anti-backflow gas water heater. Background Art

[0002] Gas water heaters are a widely used hot water supply device in modern homes. During operation, they generate a large amount of exhaust gas and waste heat. To ensure safety and efficiency, they are typically equipped with exhaust fans and exhaust ducts to effectively exhaust the exhaust gas and heat generated by combustion outdoors.

[0003] However, this design can also cause problems under certain conditions. For example, during blustery weather, strong winds can flow backward through the exhaust duct and into the water heater, causing flue gas backflow. This not only affects the normal operation of the water heater but also poses a safety hazard. Furthermore, if rainwater flows back through the exhaust duct and into the water heater during rainy days, the acidic substances (such as sulfur dioxide) contained in it may corrode the exhaust duct and the entire gas water heater, thereby shortening the service life of the equipment. Utility Model Content

[0004] The purpose of the present utility model is to solve the technical problems mentioned in the above background technology and to propose a smoke exhaust mechanism for an anti-backflow gas water heater.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A smoke exhaust mechanism for an anti-backflow gas water heater includes a curved pipe, one end of which is fixedly connected to a joint, the other end of which is fixedly connected to a straight pipe, the free end of which is fixedly connected to a short pipe, the short pipe having a plurality of smoke exhaust holes, and an anti-backflow assembly arranged in the middle of the straight pipe. The anti-backflow assembly includes:

[0007] The rotating shaft is installed to rotate along the radial direction of the straight pipe;

[0008] The first valve plate, the second valve plate and the third valve plate are sequentially sleeved and concentrically arranged from the outside to the inside, and the three sets of valve plates are all rotatably sleeved on the rotating shaft;

[0009] Rollers are installed on both sides of the same radial section of the three groups of valve plates. Stop grooves that match the rollers are opened on the valve plates and straight pipes adjacent to the rollers. The stop grooves on both sides of the rotating shaft are centrally symmetrical structures.

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

[0011] The backflow prevention assembly further comprises:

[0012] The guide rail is provided with a guide groove for accommodating the rolling of the roller, and the guide rail is fixedly connected to both sides of the edges of the second valve plate and the third valve plate, as well as both sides of the inner wall of the straight pipe.

[0013] As a further description of the above technical solution:

[0014] The straight tube is fixedly sleeved with a windproof column of matching shape at one end close to the short tube, and a fan-shaped notch opposite to one side of the valve plate is opened axially on the top of the windproof column, and a conical groove is opened at one end of the windproof column close to the anti-backflow component.

[0015] As a further description of the above technical solution:

[0016] The sector angle of the sector-shaped notch ranges from 45° to 60°, and the central angle corresponding to the guide groove is no greater than 80°.

[0017] As a further description of the above technical solution:

[0018] It also includes a spherical tube, which is fixedly connected between the straight tube and the short tube, and a plurality of water outlet grooves are opened on the bottom side of the spherical tube.

[0019] As a further description of the above technical solution:

[0020] The straight pipe is a diameter-reducing pipe that contracts from both ends to the middle.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. In the present invention, when encountering strong winds, the wind concentrates on the local position of the valve plate near the left side, and the strong wind pushes the valve plate to reset from the outside until the roller enters the stop groove and cannot be pushed anymore, thereby closing the valve plate and preventing smoke from flowing back into the gas water heater.

[0023] 2. In the present invention, since the inner diameter of the spherical tube is larger than that of the short tube, rainwater will flow along the wall of the spherical tube and out through the outlet trough, thus avoiding the corrosion problem of the water heater caused by rainwater flowing back into the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a smoke exhaust mechanism for an anti-backflow gas water heater provided in accordance with an embodiment of the present utility model is shown;

[0025] Figure 2 A schematic diagram of the internal structure of a smoke exhaust mechanism for an anti-backflow gas water heater provided in accordance with an embodiment of the present utility model is shown;

[0026] Figure 3 A schematic structural diagram of an anti-backflow assembly according to an embodiment of the present invention is shown;

[0027] Figure 4 A schematic structural diagram of a windbreak column provided according to an embodiment of the present utility model is shown;

[0028] Figure 5 Shows a cross-sectional schematic diagram provided according to an embodiment of the utility model;

[0029] Figure 6 Shown Figure 5 Enlarged schematic diagram at A.

[0030] Legend:

[0031] 1. Connector; 2. Bend pipe; 3. Straight pipe; 4. Spherical pipe; 401. Water outlet; 5. Short pipe; 501. Smoke exhaust hole; 6. Backflow prevention assembly; 61. Rotating shaft; 62. First valve plate; 63. Second valve plate; 64. Third valve plate; 65. Guide rail; 66. Roller; 67. Stop groove; 7. Windproof column; 701. Conical groove; 702. Sector-shaped notch. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 6 The utility model provides a technical solution: an exhaust mechanism for an anti-backflow gas water heater, comprising a bent pipe 2, one end of the bent pipe 2 is fixedly connected with a joint 1, the joint 1 is connected to the exhaust port of the gas water heater, the other end of the bent pipe 2 is fixedly connected with a straight pipe 3, the end of the straight pipe 3 is fixedly connected with a spherical pipe 4, a plurality of water outlet grooves 401 are provided on the bottom side of the spherical pipe 4, a short pipe 5 is fixedly connected with the end of the spherical pipe 4, the inner diameter of the spherical pipe 4 is larger than the inner diameter of the short pipe 5, and a plurality of smoke exhaust holes 501 are provided on the short pipe 5. Since the inner diameter of the spherical pipe 4 is larger than the inner diameter of the short pipe 5, rainwater will flow along the wall of the spherical pipe 4 and flow out through the water outlet groove 401, avoiding the corrosion problem of the water heater caused by rainwater backflowing into the exhaust pipe. The straight pipe 3 is a reducer that contracts from both ends to the middle to adjust the thrust of the smoke gas on the anti-backflow component 6. The middle part of the straight pipe 3 is provided with an anti-backflow component 6 in the exhaust pipe to prevent strong wind from pouring in.

[0034] Specifically, such as Figure 3 and Figure 6As shown, the backflow prevention component 6 includes: a rotating shaft 61 rotatably installed along the radial direction of the straight pipe 3, a first valve plate 62, a second valve plate 63 and a third valve plate 64 which are sequentially sleeved and concentrically arranged from the outside to the inside, and the three groups of valve plates are rotatably sleeved on the rotating shaft 61, and rollers 66 are installed on both sides of the same radial cross-section of the three groups of valve plates, and the valve plates adjacent to the rollers 66 and the straight pipe 3 are provided with stop grooves 67 that match the rollers 66. The stop grooves 67 located on both sides of the rotating shaft 61 are centrally symmetrical structures, and a guide groove for accommodating the rolling of the roller 6 is provided on the guide rail 65. The central angle corresponding to the guide groove is not greater than 80°, so as to avoid the valve plate from opening and closing at too large an angle and being unable to return to its original position. The guide rail 65 is fixedly connected to the edges of the second valve plate 63 and the third valve plate 64, as well as on both sides of the inner wall of the straight pipe 3. Under normal circumstances, the flue gas pushes the valve plate from the inside to rotate outward, opening the valve plate and being discharged in sequence through the spherical tube 4, the short tube 5 and the smoke exhaust hole 501. The valve plate group to be opened can be selectively opened according to the flue gas flow rate to avoid the flue gas flow rate being too small to push the traditional integral valve plate. When encountering strong winds, the strong wind pushes the valve plate from the outside to reset until the roller 66 enters the stop groove 67 and cannot be pushed anymore, thereby closing the valve plate and preventing the flue gas from flowing back into the gas water heater.

[0035] Specifically, such as Figure 3 and Figure 4 As shown, a windproof column 7 with a matching shape is fixedly sleeved on one end of the straight tube 3 near the short tube 5. A fan-shaped notch 702 is axially opened on the top of the windproof column 7, which is opposite to one side of the valve plate. The fan-shaped notch 702 has a fan angle ranging from 45° to 60°. A tapered groove 701 is opened on one end of the windproof column 7 near the backflow prevention component 6. When the smoke is discharged, it is discharged upward along the tapered groove 701 and out of the fan-shaped notch 702. When strong wind is poured in, the wind force is concentrated on the local position of the valve plate near the left side ( Figure 6 direction) to prevent the valve plate from being unable to return to its original position.

[0036] Working principle: When in use, under normal circumstances, the flue gas pushes the valve plate to rotate outward from the inside, opening the valve plate. When the flue gas is discharged, it is discharged upward along the conical groove 701 from the fan-shaped notch 702, and then discharged through the spherical tube 4, the short tube 5 and the smoke exhaust hole 501 in turn. And according to the size of the flue gas flow, which group of valve plates can be selectively opened to avoid the flue gas flow being too small to push the traditional integral valve plate; first, when encountering strong winds, the wind force is concentrated on the local position of the valve plate near the left side, and then pushes the valve plate to reset from the outside until the roller 66 enters the stop groove 67 and cannot be pushed, thereby closing the valve plate and preventing the flue gas from flowing back into the gas water heater; secondly, since the inner diameter of the spherical tube 4 is larger than the inner diameter of the short tube 5, rainwater will flow along the wall of the spherical tube 4 and out through the outlet groove 401, avoiding the water heater corrosion problem caused by rainwater backflowing into the smoke exhaust pipe.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A smoke exhaust mechanism for an anti-backflow gas water heater, comprising a curved pipe (2), one end of the curved pipe (2) being fixedly connected to a joint (1), the other end of the curved pipe (2) being fixedly connected to a straight pipe (3), the free end of the straight pipe (3) being fixedly connected to a short pipe (5), the short pipe (5) being provided with a plurality of smoke exhaust holes (501), characterized in that: It also includes an anti-backflow component (6) arranged in the middle of the straight pipe (3), and the anti-backflow component (6) includes: The rotating shaft (61) is rotatably mounted along the radial direction of the straight tube (3); A first valve plate (62), a second valve plate (63), and a third valve plate (64) are sequentially sleeved and concentrically arranged from the outside to the inside, and the three sets of valve plates are all rotatably sleeved on the rotating shaft (61); Rollers (66) are installed on both sides of the same radial cross section of the three sets of valve plates. Stop grooves (67) that match the rollers (66) are opened on the valve plates and straight pipes (3) adjacent to the rollers (66). The stop grooves (67) located on both sides of the rotating shaft (61) are centrally symmetrical structures.

2. The smoke exhaust mechanism for an anti-backflow gas water heater according to claim 1, characterized in that: The anti-backflow component (6) further includes: The guide rail (65) is provided with a guide groove for accommodating the rolling of the roller (66). The guide rail (65) is fixedly connected to both sides of the edge of the second valve plate (63), the third valve plate (64), and both sides of the inner wall of the straight pipe (3).

3. The smoke exhaust mechanism for an anti-backflow gas water heater according to claim 2, characterized in that: A windproof column (7) with a matching shape is fixedly sleeved on one end of the straight tube (3) close to the short tube (5), a fan-shaped notch (702) is axially provided on the top of the windproof column (7) opposite to one side of the valve plate, and a conical groove (701) is provided on one end of the windproof column (7) close to the backflow prevention component (6).

4. The smoke exhaust mechanism for an anti-backflow gas water heater according to claim 3, characterized in that: The sector angle of the sector-shaped notch (702) ranges from 45° to 60°, and the central angle corresponding to the guide groove is no greater than 80°.

5. The smoke exhaust mechanism for an anti-backflow gas water heater according to claim 4, characterized in that: It also includes a spherical tube (4), which is fixedly connected between the straight tube (3) and the short tube (5), and a plurality of water outlet grooves (401) are provided on the bottom side of the spherical tube (4).

6. The smoke exhaust mechanism for an anti-backflow gas water heater according to claim 5, characterized in that: The straight tube (3) is a diameter-reducing tube that contracts from both ends toward the middle.

Images