A chimney cap device having a wind and rain proof structure
By designing a structure consisting of a fixed cylinder, a conical cover, a fixed ring, an outer shell, and a conical shroud, combined with the vibration mechanism of a scraper and a small hammer, the problem of rainwater entering the chimney was solved, achieving wind and rain protection, ensuring smooth smoke exhaust and equipment safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGHONG ENERGY (TUANFENG) CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-05
AI Technical Summary
When the existing chimney rain cover is opened during rainy weather, rainwater enters the chimney, causing corrosion of the chimney's inner wall and affecting the smoke extraction efficiency.
The structure features a fixed cylinder, conical cover, fixed ring, outer shell, and conical hood. Combined with the vibration mechanism of scraper and small hammer, it ensures that rainwater is discharged through the square pipe and flue gas is discharged through the fixed ring and conical hood, preventing rainwater from entering the chimney.
It effectively blocks rainwater from entering the chimney, preventing corrosion, maintaining smooth smoke exhaust, extending the service life of the chimney, and ensuring the safe operation of the equipment.
Smart Images

Figure CN224327205U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chimney cap technology, and in particular to a chimney cap device with a windproof and rainproof structure. Background Technology
[0002] In various industrial production processes, chimneys play a crucial role as key channels for discharging combustion exhaust gases. A search revealed Chinese patent CN222910108U, which discloses a windproof and rainproof device for exhaust vents, relating to the technical field of exhaust vent structures. The device includes an exhaust pipe with a clamp fitted at its outlet end. A counterweight plate is hinged to one side of the clamp via a connecting plate, and a rainproof cover that can close onto the outlet of the exhaust pipe is attached to the counterweight plate. A windproof component is also installed on the exhaust pipe. This utility model's rainproof cover, under its own weight, closes at the outlet of the exhaust pipe, providing rain and foreign object protection. When the engine in the generator set starts operating, the rainproof cover opens under the action of the counterweight and the airflow inside the exhaust pipe, thus discharging the exhaust gases, achieving automatic exhaust and automatic closing. Simultaneously, the windproof component installed on the exhaust pipe prevents the rainproof cover from being blown open by external airflow. The overall structure is simple, easy to install, and reliable, effectively preventing external wind interference.
[0003] The windproof and rainproof device for a smoke exhaust outlet in the aforementioned patent has the following shortcomings: when the device is venting smoke, the rainproof cover automatically opens under pressure and automatically closes when it is not venting smoke. However, when the rainproof cover is open to vent smoke during rainy weather, rainwater will enter the chimney. Therefore, a chimney cap device with a windproof and rainproof structure has been designed. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a chimney cap device with a windproof and rainproof structure.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A chimney cap device with a windproof and rainproof structure includes a fixed cylinder. A circular plate is fixedly connected to the top of the fixed cylinder, and four square tubes are fixedly embedded at equal intervals along the circumference of the circular plate. The circular plate has square holes that fit the square tubes. Connecting blocks are fixedly connected to the bottom outer sides of the four square tubes. A common outer shell is fixedly connected to the outer sides of the four connecting blocks, and a conical cover is fixedly connected to the top of the outer shell. The top of the conical cover has a smoke exhaust hole. A common fixing ring is fixedly connected to the top of the four square tubes, and the fixing ring communicates with the four square tubes. A shielding cylinder is fixedly connected to the outer side of the top of the fixing ring. Through the arrangement of the outer shell, conical cover, connecting blocks, and conical cap, rainwater cannot enter the chimney and is discharged from the four square tubes.
[0007] Preferably, a conical cover is fixedly connected to the inner edge of the fixing ring, and a rotating rod is rotatably sleeved in the middle of the conical cover, and a circular hole adapted to the rotating rod is opened in the middle of the conical cover.
[0008] Preferably, a connecting rod is fixedly connected to one side of the top of the rotating rod, and a guide plate is fixedly connected to the other end of the connecting rod. A wind baffle is also fixedly connected to the top of the conical shroud via a fixing rod. The wind baffle and the guide plate are in opposite directions and are adapted to the top of the conical shroud.
[0009] Preferably, the rotating rod is fixedly connected to three bending scrapers at equal intervals around the top of the conical cover via connecting rods. The bending scrapers are adapted to the outer shell and the inner wall of the conical cover. The bending scrapers can scrape the outer shell and the inside of the conical cover, so that dust particles will not adhere for a long time.
[0010] Preferably, the rotating rod is fixedly connected to three spring rods at equal intervals around the bottom of the conical cover, and a small hammer is fixedly connected to the other end of each spring rod.
[0011] Preferably, each of the three square tubes has a striking block fixedly connected to its inner top, and the striking block is adapted to a small hammer. By striking the striking block with the small hammer, the conical cap and the square tube can vibrate, causing the attached particles to fall off.
[0012] Preferably, a connecting cover is fixedly connected to the bottom circumferential outer wall of the fixed cylinder by a clamp, which facilitates the connection between the chimney and the device.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. By employing a fixed cylinder, conical cover, fixed ring, outer shell, and conical hood, the chimney water enters through the gap at the bottom edge of the fixed ring into the gap between the outer shell and the shielding cylinder, and finally exits through the top of the conical hood. This ensures that during rainy weather, rainwater is discharged through the square pipe and does not enter the interior of the chimney. This effectively solves the problem mentioned in the background technology that rainwater can enter the interior of the chimney, thereby completely blocking the path of rainwater entering the interior of the chimney, preventing rainwater from corroding the inner wall of the chimney, without affecting the exhaust operation, extending the service life of the chimney, and ensuring the safe operation of the chimney and related equipment.
[0015] 2. The installation of scrapers and small hammers allows the rotating rod to adjust its position with the wind, enabling the wind deflector to block the top of the conical hood. At the same time, the bending scraper scrapes the outer shell and the inside of the conical hood, and the small hammers strike and vibrate the conical cover, ensuring that the path of flue gas emission remains unobstructed. Attached Figure Description
[0016] Figure 1This is a schematic diagram of the overall structure of a chimney cap device with a windproof and rainproof structure proposed in this utility model;
[0017] Figure 2 This is a cross-sectional structural diagram of the outer shell of a chimney cap device with a windproof and rainproof structure proposed in this utility model;
[0018] Figure 3 This is a schematic diagram of the internal structure of the outer shell of a chimney cap device with a windproof and rainproof structure proposed in this utility model;
[0019] Figure 4 This is a schematic diagram of the fixing ring of a chimney cap device with a windproof and rainproof structure proposed in this utility model;
[0020] Figure 5 This utility model proposes a chimney cap device with a windproof and rainproof structure. Figure 4 An enlarged structural diagram of point A.
[0021] In the diagram: 1. Outer shell; 101. Conical cover; 2. Rotating rod; 201. Wind deflector; 202. Connecting rod; 203. Guide plate; 204. Bending scraper; 3. Connecting cover; 4. Fixing cylinder; 401. Circular piece; 5. Fixing ring; 501. Square tube; 502. Connecting block; 503. Baffle cylinder; 504. Conical cover; 505. Striking block; 6. Spring rod; 601. Small hammer. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Reference Figures 1-5 A chimney cap device with a windproof and rainproof structure includes a fixed cylinder 4. A circular plate 401 is fixedly connected to the top of the fixed cylinder 4, and four square tubes 501 are fixedly embedded at equal intervals along the circumference of the circular plate 401. The circular plate 401 has square holes that fit the square tubes 501. Connecting blocks 502 are fixedly connected to the bottom of the outer side of each of the four square tubes 501. The same outer shell 1 is fixedly connected to the outer side of the four connecting blocks 502. A conical cover 101 is fixedly connected to the top of the outer shell 1, and a smoke exhaust hole is opened at the top of the conical cover 101. The same fixing ring 5 is fixedly connected to the top of the four square tubes 501, and the fixing ring 5 is connected to the four square tubes 501. The four square tubes 501 facilitate drainage and prevent impurities from clogging. A shielding cylinder 503 is fixedly connected to the outer side of the top of the fixing ring 5.
[0024] In this utility model, a conical cover 504 is fixedly connected to the inner edge of the fixing ring 5. The conical cover 504 facilitates drainage and rain protection, and a rotating rod 2 is rotatably sleeved in the middle of the conical cover 504. A round hole adapted to the rotating rod 2 is opened in the middle of the conical cover 504.
[0025] In this utility model, a connecting rod 202 is fixedly connected to one side of the top of the rotating rod 2, and a guide plate 203 is fixedly connected to the other end of the connecting rod 202. The rotating rod 2 is also fixedly connected to a wind deflector 201 at the top of the conical cover 101 by a fixing rod. The wind deflector 201 and the guide plate 203 are in opposite directions, and the wind deflector 201 is adapted to the top of the conical cover 101. The guide plate 203 can swing with the wind, so that the wind deflector 201 can block the windward side of the top of the conical cover 101.
[0026] In this utility model, the rotating rod 2 is located at the top of the conical cover 504 and is fixedly connected to three bending scrapers 204 at equal intervals around its circumference via connecting rods. The bending scrapers 204 are adapted to the inner wall of the outer shell 1 and the conical cover 101. The bending scrapers 204 can scrape the inside of the conical cover 101 and the outer shell 1, so that no smoke particles will adhere to the inner wall of the conical cover 101 and the outer shell 1, thus ensuring stable smoke exhaust.
[0027] In this utility model, the rotating rod 2 is fixedly connected to three spring rods 6 at equal intervals around the bottom of the conical cover 504. Each spring rod 6 is fixedly connected to a small iron hammer 601 at the other end. By striking the striking block 505 with the small iron hammer 601, the conical cover 504 and the square tube 501 are easily vibrated, making it difficult for dust particles to adhere.
[0028] In this utility model, the top inner sides of the three square tubes 501 are all fixedly connected with striking blocks 505, and the striking blocks 505 are compatible with small iron hammers 601. The bottom circumferential outer wall of the fixed cylinder 4 is fixedly connected with a connecting cover 3 by a clamp. By replacing different connecting covers 3, the device can be easily installed on chimneys of different diameters.
[0029] Working Principle: When using this device, a suitable connecting cover 3 is selected based on the outer diameter of the chimney and fixed with clamps. Simultaneously, the connecting cover 3 is connected to the fixed cylinder 4 via clamps. During rain, rainwater enters the device through the top of the conical cover 101. Due to the obstruction of the shielding cylinder 503, the fixing ring 5, and the conical cover 504, rainwater cannot enter the chimney. Furthermore, the conical shape of the shielding cover 101 limits the amount of rainwater entering the device, and inclined rainwater is also blocked by the shielding cylinder 503, making it difficult for it to enter the chimney. Rainwater entering the shielding cylinder 503 and the top of the conical cover 504 is discharged through four square pipes 501. The square pipes 501 prevent impurities from clogging the pipes, ensuring rainwater discharge. When the chimney is venting smoke, the obstruction of the fixing ring 5 and the conical cover 504 prevents the smoke from entering the chimney. The exhaust gas exits from the bottom edge of the fixed ring 5, enters the gap between the outer shell 1 and the shielding cylinder 503, and finally exits through the top of the conical hood 101. Through the above settings, rainwater will not enter the chimney during the exhaust process. At the same time, when there is wind, the guide plate 203 will be blown by the wind, causing the rotating rod 2 to rotate, so that the wind baffle 201 faces the wind direction and shields the top of the conical hood 101. At the same time, as the rotating rod 2 rotates randomly with the wind, the bending scraper 204 scrapes the inside of the outer shell 1 and the conical hood 101, so that the particles in the flue gas will not adhere to the inner wall of the outer shell 1 and the conical hood 101 for a long time, ensuring the exhaust of the flue gas. Meanwhile, the small hammer 601 will randomly strike the striking block 505, causing the conical cover 504 and the square tube 501 to vibrate, which also prevents small particles in the flue gas from adhering.
[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A chimney cap device with a windproof and rainproof structure, comprising a fixing cylinder (4), characterized in that, The top of the fixed cylinder (4) is fixedly connected to a circular plate (401), and four square tubes (501) are fixedly embedded at equal intervals on the circumferential edge of the circular plate (401). The circular plate (401) has square holes that are compatible with the square tubes (501). The bottom of the four square tubes (501) is fixedly connected to a connecting block (502). The four connecting blocks (502) are fixedly connected to the same outer shell (1). The top of the outer shell (1) is fixedly connected to a conical cover (101), and the top of the conical cover (101) has a smoke exhaust hole. The top of the four square tubes (501) is fixedly connected to the same fixed ring (5), and the fixed ring (5) is connected to the four square tubes (501). The top of the fixed ring (5) is fixedly connected to a shielding cylinder (503).
2. A chimney cap device with a windproof and rainproof structure according to claim 1, characterized in that, A conical cover (504) is fixedly connected to the inner edge of the fixed ring (5), and a rotating rod (2) is rotatably sleeved in the middle of the conical cover (504). A round hole adapted to the rotating rod (2) is opened in the middle of the conical cover (504).
3. A chimney cap device with a windproof and rainproof structure according to claim 2, characterized in that, A connecting rod (202) is fixedly connected to one side of the top of the rotating rod (2), and a guide plate (203) is fixedly connected to the other end of the connecting rod (202). The rotating rod (2) is also fixedly connected to a baffle plate (201) at the top of the conical cover (101) by a fixing rod. The baffle plate (201) and the guide plate (203) are in opposite directions, and the baffle plate (201) is adapted to the top of the conical cover (101).
4. A chimney cap device with a windproof and rainproof structure according to claim 3, characterized in that, The rotating rod (2) is located at the top of the conical cover (504) and is fixedly connected to three bending scrapers (204) at equal intervals around its circumference via connecting rods. The bending scrapers (204) are adapted to the inner walls of the outer shell (1) and the conical cover (101).
5. A chimney cap device with a windproof and rainproof structure according to claim 4, characterized in that, The rotating rod (2) is fixedly connected to three spring rods (6) at equal intervals around the bottom of the conical cover (504), and a small hammer (601) is fixedly connected to the other end of each spring rod (6).
6. A chimney cap device with a windproof and rainproof structure according to claim 1, characterized in that, The top of the inner side of each of the three square tubes (501) is fixedly connected with a striking block (505), and the striking block (505) is compatible with a small hammer (601).
7. A chimney cap device with a windproof and rainproof structure according to claim 1, characterized in that, The bottom circumferential outer wall of the fixed cylinder (4) is fixedly connected to the connecting cover (3) by a clamp.