Double-chimney structure capable of preventing smoke backflow

Abstract

The utility model belongs to the technical field of chimneys, and particularly relates to a smoke backflow prevention double-chimney structure which comprises a chimney pipe and a connecting tee joint, one end of the connecting tee joint is connected with the chimney pipe in an inserted mode, the other two ends of the connecting tee joint are connected with fixing tee joints in an inserted mode respectively, and the parallel ends of the two fixing tee joints are perpendicular to each other, so that four outlets correspond to four directions respectively. The outlet end of the fixed tee joint is fixedly connected with a windward closed sealing mechanism, the sealing mechanism comprises a connecting plug, the connecting plug is inserted into the outlet of the fixed tee joint, the outlet end of the connecting plug is fixedly provided with a fixed ring, and the end, away from the connecting plug, of the fixed ring is fixedly provided with a sealing shell. According to the smoke backflow prevention double-chimney structure, the two chimneys are arranged, the four outlets correspond to the four directions, the sealing mechanisms are arranged at the outlets, a wind blowing windward plate enables a sealing gasket to drive a center shaft to slide, sealing is formed through the sealing gasket and a sealing shell, the other three outlets can be normally used, and it is avoided that wind blows into the chimney pipes to form smoke backflow.

Description

Technical Field

[0001] The utility model belongs to the technical field of chimneys, and particularly relates to a double-chimney structure for preventing backdraft. Background Art

[0002] The function of a chimney is to discharge combustion waste gas, soot, harmful gases, etc. generated during the combustion process (such as in power plants, factories, etc.) into the atmosphere to reduce indoor pollution. It helps to form natural ventilation, strengthen air circulation, improve combustion conditions, and increase combustion efficiency.

[0003] For example, the Chinese patent with the publication number CN201382431Y discloses an automatic backdraft preventer, specifically an automatic backdraft preventer installed at the outlet end of a chimney. It includes a base, a rotating shaft, and a rain cap. The base is in a circular ring shape, and a rotating shaft is vertically installed at its center. A circular crossbar is installed on the rotating shaft, and an arc-shaped wind baffle is installed on the outside of the rotating shaft through this circular crossbar. An automatic wind direction plate is installed exactly in the center opposite to the arc-shaped wind baffle.

[0004] This technical solution has a simple structure and is easy to use. Regardless of the wind direction, the automatic wind direction plate always automatically adjusts to the downwind position, thereby driving the arc-shaped wind baffle to block the wind, and the wind cannot pour into the chimney, effectively preventing the backdraft phenomenon. However, the smoke discharged from the chimney contains soot, and after long-term use, the resistance of the rotating shaft increases during rotation, which may lead to the failure of the device. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a double-chimney structure for preventing backdraft to achieve the effect of preventing backdraft against winds from different directions in view of the above existing technical problems.

[0006] In view of this, the utility model provides a double-chimney structure for preventing backdraft, which includes a chimney pipe, and also includes a connecting tee. One end of the connecting tee is inserted into the chimney pipe, and the other two ends are respectively inserted with fixed tees. The parallel ends of the two fixed tees are perpendicular to each other, so that the four outlets respectively correspond to four directions. A sealing mechanism that closes against the wind is fixedly connected to the outlet end of the fixed tee. The sealing mechanism includes a connecting plug, the connecting plug is inserted into the inside of the outlet of the fixed tee, a fixing ring is fixedly installed at the outlet end of the connecting plug, a sealing housing is fixedly installed at the end of the fixing ring away from the connecting plug, a limiting sleeve is fixedly installed on the inner circle of the fixing ring, a central shaft is slidably connected to the middle of the limiting sleeve, a sealing pad is fixedly installed at the end of the central shaft located outside the sealing housing, a windward plate is fixedly installed at the end of the sealing pad away from the central shaft, a baffle is fixedly installed at the end of the central shaft located inside the connecting plug, and the baffle is fixedly connected to the limiting sleeve through a return spring.

[0007] Preferably, connecting rings are provided at all three ports of the connecting tee, and connecting rings are only provided at the two horizontal ends of the fixed tee.

[0008] Preferably, rotating rings are rotatably connected to the sides of the baffle and the limiting sleeve close to each other. Clamping rings for fixing the return springs are fixedly installed on the sides of the rotating rings close to each other. The return springs are fixedly connected to the clamping rings. A rotating connection is provided between the central shaft and the limiting sleeve. A group of blades are fixedly installed on the side of the windward plate close to the gasket.

[0009] Preferably, the fixing ring and the limiting sleeve are fixedly connected by support rods, and a plurality of support rods are distributed in a circular array.

[0010] Preferably, one end of the gasket close to the sealing housing is in a boss shape, and the end far from the sealing housing is in a cylindrical shape. The shape of the sealing housing is adapted to the shape of the gasket.

[0011] Preferably, a threaded connection is provided between the central shaft and the gasket, and the threaded connection between the central shaft and the gasket is adhesively bonded with glue.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. For the double-chimney structure for preventing backflow of smoke, the two chimneys are arranged such that the four outlets correspond to four directions, and a sealing mechanism is provided at the outlets. When the wind blows the windward plate, the gasket drives the central shaft to slide, and a seal is formed by the gasket and the sealing housing, enabling the other three outlets to be used normally and preventing the wind from blowing into the chimney pipe to form backflow of smoke.

[0014] 2. For the double-chimney structure for preventing backflow of smoke, rotating rings are rotatably connected to the sides of the baffle and the limiting sleeve close to each other. Clamping rings for fixing the return springs are fixedly installed on the sides of the rotating rings close to each other. The return springs are fixedly connected to the clamping rings. A rotating connection is provided between the central shaft and the limiting sleeve. A group of blades are fixedly installed on the side of the windward plate close to the gasket. Through such an arrangement, when perpendicular to the wind direction, the wind can drive the central shaft to rotate, thereby preventing the central shaft and the limiting sleeve from rusting and connecting together. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the connecting tee of the present utility model;

[0017] Figure 3 is a schematic diagram of the fixed tee of the present utility model;

[0018] Figure 4 is a schematic diagram of the connection of the sealing housing of the present utility model;

[0019] Figure 5 is a schematic diagram of the connection of the gasket of the present utility model.

[0020] The markings in the figure are as follows:

[0021] 1. Chimney pipe; 2. Connecting tee; 3. Fixed tee; 4. Sealing mechanism; 5. Connecting ring; 6. Support rod; 7. Rotating ring; 8. Snap ring; 9. Blade; 401. Connecting plug; 402. Fixed ring; 403. Sealing housing; 404. Limit sleeve; 405. Central shaft; 406. Sealing gasket; 407. Windward plate; 408. Baffle plate; 409. Return spring. Detailed implementation mode

[0022] The following further elaborates on this application in conjunction with the attached Figures 1 - 5 drawings for a more detailed description.

[0023] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, component or part must have a specific orientation or be constructed and operated in a specific orientation.

[0024] An embodiment of this application discloses a double chimney structure for preventing backdraft, which includes a chimney pipe 1 and also includes a connecting tee 2. One end of the connecting tee 2 is inserted into the chimney pipe 1, and the other two ends are respectively inserted with fixed tees 3. The parallel ends of the two fixed tees 3 are perpendicular to each other, so that the four outlets correspond to four directions respectively. The outlet end of the fixed tee 3 is fixedly connected with a sealing mechanism 4 that closes against the wind. The sealing mechanism 4 includes a connecting plug 401, the connecting plug 401 is inserted into the outlet of the fixed tee 3, a fixed ring 402 is fixedly installed at the outlet end of the connecting plug 401, a sealing housing 403 is fixedly installed at the end of the fixed ring 402 away from the connecting plug 401, a limit sleeve 404 is fixedly installed on the inner ring of the fixed ring 402, a central shaft 405 is slidably connected to the middle of the limit sleeve 404, a sealing gasket 406 is fixedly installed at one end of the central shaft 405 located outside the sealing housing 403, a windward plate 407 is fixedly installed at the end of the sealing gasket 406 away from the central shaft 405, a baffle plate 408 is fixedly installed at one end of the central shaft 405 located inside the connecting plug 401, and the baffle plate 408 and the limit sleeve 404 are fixedly connected through a return spring 409.

[0025] Based on the above structure,

[0026] In one of the embodiments, connecting rings 5 are provided at all three ports of the connecting tee 2, and connecting rings 5 are only provided at the two horizontal ends of the fixed tee 3. Specifically, the function of the connecting ring 5 is to be inserted into the part without the connecting ring 5 and then connected with sealant after the insertion is completed.

[0027] In this embodiment, through such a setting, all pipes can be connected together to form a continuous cavity.

[0028] Based on the above structure,

[0029] In one of the embodiments, rotating rings 7 are rotatably connected to the sides of the baffle 408 and the limiting sleeve 404 that are close to each other. Clamping rings 8 for fixing the return spring 409 are fixedly installed on the sides of the rotating rings 7 that are close to each other. The return spring 409 is fixedly connected to the clamping ring 8. The central shaft 405 is rotatably connected to the limiting sleeve 404. A group of blades 9 are fixedly installed on the side of the windward plate 407 close to the gasket 406. Specifically, the rotating rings 7 and the clamping rings 8 can fix the return spring 409, enabling the central shaft 405 to rotate and driving the return spring 409 to move during the sliding process.

[0030] In this embodiment, through such a setting, when perpendicular to the wind direction, the wind can drive the central shaft 405 to rotate, thereby preventing the central shaft 405 from rusting and connecting to the limiting sleeve 404.

[0031] Based on the above structure,

[0032] In one of the embodiments, the fixing ring 402 and the limiting sleeve 404 are fixedly connected by support rods 6, and a plurality of support rods 6 are distributed in a circular array. Specifically, the support rods 6 can support the limiting sleeve 404, enabling a large gap to exist between the limiting sleeve 404 and the fixing ring 402 for the smoke to flow through.

[0033] In this embodiment, through such a setting, the limiting sleeve 404 can be fixed and supported.

[0034] Based on the above structure,

[0035] In one of the embodiments, one end of the gasket 406 close to the sealing housing 403 is in a convex shape, and the end far from the sealing housing 403 is in a cylindrical shape. The shape of the sealing housing 403 is adapted to the shape of the gasket 406. Specifically, the convex part is inserted into the sealing housing 403, and then the cylindrical part is inserted to ensure a good sealing effect.

[0036] In this embodiment, by setting two-stage sealing, a good sealing effect can be ensured.

[0037] Based on the above structure,

[0038] In one embodiment, the central shaft 405 is threadedly connected to the gasket 406, and the threaded connection between the central shaft 405 and the gasket 406 is adhesively bonded with glue. Specifically, one end of the central shaft 405 is provided with an opening, and a threaded groove is provided in the center of the gasket 406. After the two are connected, the two connected parts are fixed with glue.

[0039] In this embodiment, by threadedly connecting the central shaft 405 and the gasket 406, during the assembly process, it is convenient to assemble the central shaft 405 through the limit sleeve 404 and then perform the threaded connection. After the assembly is completed, the connection position is adhesively bonded to prevent the two from falling off.

[0040] When the double-chimney structure for preventing backdraft of this embodiment is in use, by providing two chimneys and making the four outlets correspond to four directions, and a sealing mechanism 4 is provided at the outlets. The wind blows the windward plate 407, causing the gasket 406 to drive the central shaft 405 to slide. A seal is formed by the gasket 406 and the sealing housing 403, and the other three outlets can be used normally, preventing the wind from blowing into the chimney pipe 1 to form backdraft.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A double chimney structure for preventing backflow of smoke, comprising a chimney pipe (1), characterized in that: It further includes a connecting tee (2). One end of the connecting tee (2) is inserted into the chimney pipe (1), and the other two ends are respectively inserted with fixed tees (3). The parallel ends of the two fixed tees (3) are perpendicular to each other, so that the four outlets correspond to four directions respectively. The outlet end of the fixed tee (3) is fixedly connected with a sealing mechanism (4) that closes against the wind. The sealing mechanism (4) includes a connecting plug (401). The connecting plug (401) is inserted into the outlet of the fixed tee (3). A fixing ring (402) is fixedly installed at the outlet end of the connecting plug (401). A sealing housing (403) is fixedly installed at one end of the fixing ring (402) away from the connecting plug (401). A limiting sleeve (404) is fixedly installed on the inner ring of the fixing ring (402). A central shaft (405) is slidably connected to the middle of the limiting sleeve (404). A sealing gasket (406) is fixedly installed at one end of the central shaft (405) outside the sealing housing (403). A windward plate (407) is fixedly installed at one end of the sealing gasket (406) away from the central shaft (405). A baffle (408) is fixedly installed at one end of the central shaft (405) inside the connecting plug (401). The baffle (408) and the limiting sleeve (404) are fixedly connected by a return spring (409).

2. The double chimney structure for preventing backdraft according to claim 1, characterized in that: Connecting rings (5) are provided at all three ports of the connecting tee (2), and connecting rings (5) are provided only at the two horizontal ends of the fixed tee (3).

3. The double chimney structure for preventing backdraft according to claim 1, characterized in that: Rotating rings (7) are rotatably connected to the sides of the baffle (408) and the limiting sleeve (404) close to each other. Clamping rings (8) for fixing the return spring (409) are fixedly installed on the sides of the rotating rings (7) close to each other. The return spring (409) is fixedly connected to the clamping ring (8). The central shaft (405) and the limiting sleeve (404) are rotatably connected. A group of blades (9) are fixedly installed on the side of the windward plate (407) close to the sealing gasket (406).

4. The double-chimney structure for preventing backflow of smoke according to claim 3, characterized in that: The fixing ring (402) and the limiting sleeve (404) are fixedly connected by a support rod (6), and multiple support rods (6) are distributed in a circular array.

5. A double chimney structure for preventing backdraft according to claim 4, characterized in that: One end of the sealing gasket (406) close to the sealing housing (403) is in a convex shape, and the end away from the sealing housing (403) is in a cylindrical shape. The shape of the sealing housing (403) is adapted to the shape of the sealing gasket (406).

6. The double chimney structure for preventing backdraft according to claim 1, characterized in that: The central shaft (405) and the sealing gasket (406) are threadedly connected, and the threaded connection between the central shaft (405) and the sealing gasket (406) is bonded with glue.

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