Contactless air induction structure

Abstract

This utility model relates to the technical field of ventilation equipment, and more particularly to a non-contact induced draft structure. It includes an induced draft pipe, a booster pipe at one end, and a guide pipe on one side of the induced draft pipe. One end of the guide pipe is located inside the induced draft pipe and coaxially arranged with it. The end face of the guide pipe is flush with the connection surface of the induced draft pipe and the booster pipe. The other end of the guide pipe penetrates the side of the induced draft pipe. An exhaust centrifugal chamber is connected to the outer end of the guide pipe. An exhaust pipe is located at the other end of the booster pipe, and a pressure relief pipe is located at the other end of the exhaust pipe. This utility model provides a non-contact induced draft structure. By introducing high-speed airflow into the induced draft pipe, a negative pressure is formed at one end of the induced draft pipe, preventing the exhaust gas inside the induced draft pipe from contacting the fan. This ensures the fan operates in a non-working medium environment, reducing the risk of equipment corrosion and high temperatures, decreasing equipment failure rate, and offering a simple structure and convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation equipment, and in particular to a non-contact air intake structure. Background Technology

[0002] Exhaust fan structures play a crucial role in industrial equipment and facilities, especially in applications involving combustion processes, exhaust emissions, and airflow management. Their primary functions are to ensure the smooth discharge of flue gas generated during combustion or waste gases produced during the process, maintaining system pressure balance while supporting environmental compliance and safe equipment operation. Exhaust fan structures effectively extract and guide flue gas or waste gases generated during combustion to chimneys or exhaust ducts. They accelerate the discharge of waste gases from the combustion chamber, thereby accelerating the entry of air into the combustion chamber, optimizing the combustion process, reducing incomplete combustion, and improving energy efficiency. In conjunction with environmental protection equipment, exhaust fan structures can effectively collect and treat particulate matter and other harmful substances in waste gases, reducing environmental impact. They ensure that waste gases are treated and discharged according to prescribed standards, helping companies comply with relevant laws and regulations. Regular cleaning and appropriate exhaust volume can prevent dust accumulation inside equipment, extending equipment lifespan. In some high-temperature operating environments, the airflow provided by the exhaust fan structure can also cool the equipment, preventing overheating damage.

[0003] Existing induced draft fans come into direct contact with polluted or toxic working media during operation, causing problems such as equipment contamination or corrosion. Moreover, most of these fans operate in harsh environments with high temperatures, toxicity, and pollution, requiring high adaptability from the equipment, which conventional equipment cannot meet. Furthermore, building ventilation typically relies on natural or mechanical methods. Natural ventilation is limited by weather conditions and cannot operate stably around the clock, offering limited effectiveness for high-rise buildings or buildings with complex layouts. Mechanical ventilation has a higher initial investment and relatively higher operating costs, requiring regular maintenance to ensure the system functions properly. Utility Model Content

[0004] Technical objective: In order to overcome the shortcomings of the existing technology, this utility model provides a non-contact ventilation device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: It includes an exhaust pipe, a booster pipe is provided at one end of the exhaust pipe, the size of the booster pipe at one end is the same as the size of the exhaust pipe, a guide pipe is provided on one side of the exhaust pipe, one end of the guide pipe is located inside the exhaust pipe and is coaxially arranged with the exhaust pipe, the end face of the guide pipe is flush with the connection surface of the exhaust pipe and the booster pipe, the other end of the guide pipe passes through the side of the exhaust pipe, and an exhaust centrifugal chamber is connected to the outer end of the guide pipe; the size of the other end of the booster pipe is smaller than the size of the exhaust pipe, an exhaust pipe is provided at the other end of the booster pipe, a pressure relief pipe is provided at the other end of the exhaust pipe, and the pressure relief pipe is mirrored with the exhaust pipe.

[0006] Preferably, a connecting pipe is coaxially arranged above the exhaust centrifugal chamber, and an intake centrifugal chamber is coaxially arranged above the connecting pipe. The connecting pipe passes through the top surface of the exhaust centrifugal chamber and the bottom surface of the intake centrifugal chamber. A first-stage centrifugal turbine is coaxially arranged inside the intake centrifugal chamber. A stabilizing platform is arranged below the first-stage centrifugal turbine. Multiple connecting blocks are evenly arranged on the side of the stabilizing platform, and the other end of the connecting blocks is fixed to the inner wall of the intake centrifugal chamber.

[0007] Preferably, a limiting platform is provided on the top surface of the air intake centrifugal chamber, the side of the limiting platform is parallel to the side of the first-stage centrifugal turbine, and an air intake pipe is provided above the limiting platform; a first limiting block is provided inside the lower part of the air intake centrifugal chamber on the outside of the connecting pipe, and the side of the first limiting block is parallel to the side of the stabilizing platform.

[0008] Preferably, a two-stage centrifugal turbine is coaxially arranged inside the exhaust centrifugal chamber, and a rotating shaft is coaxially arranged on the bottom surface of the first-stage centrifugal turbine. The rotating shaft passes through the stabilizing platform, and a third bearing is arranged at the connection between the rotating shaft and the stabilizing platform. A second limiting block is arranged inside the exhaust centrifugal chamber. The side of the second limiting block is parallel to the side of the second-stage centrifugal turbine, and the top surface of the second limiting block is connected to the connecting pipe. The air guide pipe passes through one side of the second limiting block and is located inside the second limiting block.

[0009] Preferably, a partition is coaxially arranged below the exhaust centrifugal chamber, and an active turbine chamber is coaxially arranged below the partition. An aerodynamic turbine is coaxially arranged inside the active turbine chamber. The inner side of the active turbine chamber is parallel to the side of the aerodynamic turbine. A connecting platform is arranged above the aerodynamic turbine. A rotating shaft is coaxially arranged on the top surface of the connecting platform. The rotating shaft passes through the top surface of the active turbine chamber, the partition, and the bottom surface of the exhaust centrifugal chamber and connects to the bottom of the secondary centrifugal turbine. A second bearing is arranged between the rotating shaft and the top surface of the active turbine chamber.

[0010] Preferably, a vent pipe is provided on one side of the active turbine housing, and the vent pipe is connected to the interior of the active turbine housing; an exhaust seat is provided at the center of the outer side of the bottom surface of the active turbine housing, and the exhaust seat is connected to the interior of the active turbine housing; multiple exhaust holes are provided on the side of the exhaust seat; and a sealing plate is provided on the outer side of the bottom end of the exhaust seat.

[0011] Preferably, a balance shaft is coaxially arranged on the bottom surface of the pneumatic turbine, and a first bearing is arranged at the bottom inside the exhaust seat. The first bearing is located outside the balance shaft, and the other end of the balance shaft is located inside the sealing plate.

[0012] Preferably, the vent pipe and the air guide pipe are arranged opposite each other; multiple support rods are evenly arranged at the bottom edge of the active turbine compartment, and a support base is provided at the other end of the support rod.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model provides a non-contact exhaust structure. By setting an air guide pipe, a high-speed airflow is introduced into the exhaust pipe, forming a negative pressure at one end of the exhaust pipe, which drives the gas flow inside the exhaust pipe. This prevents the exhaust gas inside the exhaust pipe from contacting the fan, ensuring that the fan operates in a non-working medium environment, reducing the risk of equipment corrosion, high temperature, etc., reducing the equipment failure rate, and making the structure simple and easy to maintain.

[0015] 2. This utility model provides a non-contact air intake structure. By setting up an active turbine chamber, the fan introduces gas into the active turbine chamber, driving the pneumatic turbine to rotate. At the same time, it drives the rotation of the first-stage centrifugal turbine and the second-stage centrifugal turbine. The first-stage centrifugal turbine and the second-stage centrifugal turbine centrifugally compress and increase the speed of the external gas, so that the gas velocity entering the air intake pipe is greater than the gas velocity entering the active turbine chamber from the fan. It can be adapted to air intake pipes of different sizes and achieves the dual effects of energy saving and environmental protection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the non-contact air-guiding structure of this utility model;

[0017] Figure 2 This is a bottom view of the non-contact air intake structure of this utility model;

[0018] Figure 3 This is a partial cross-section of the non-contact air intake structure of this utility model. Figure 1 ;

[0019] Figure 4 This is a partial cross-section of the non-contact air intake structure of this utility model. Figure 2 ;

[0020] Figure 5 This is a partial cross-section of the non-contact air intake structure of this utility model. Figure 3 .

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Exhaust pipe; 11. Pressure booster pipe; 12. Exhaust pipe; 13. Pressure relief pipe; 14. Air guide pipe; 2. Active turbine compartment; 21. Support rod; 22. Support base; 23. Vent pipe; 24. Exhaust seat; 25. Exhaust port; 26. Sealing plate; 3. Outlet centrifugal chamber; 31. Connecting pipe; 32. Inlet centrifugal chamber; 33. Limiting platform; 34. Inlet pipe; 4. Pneumatic turbine; 41. Connecting platform; 42. Balance shaft; 43. First bearing; 5. First-stage centrifugal turbine; 51. Second-stage centrifugal turbine; 52. Stabilizing platform; 53. Connecting block; 54. First limiting block; 55. Second limiting block; 56. Rotating shaft; 57. Second bearing; 58. Third bearing; 6. Partition plate. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 To be continued Figure 5 The principles and features of this utility model are described, and the examples given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0024] Please see Figures 1-5 A non-contact exhaust structure includes an exhaust pipe 1, with a booster pipe 11 at one end of the exhaust pipe 1. The size of one end of the booster pipe 11 is the same as that of the exhaust pipe 1. A guide pipe 14 is provided on one side of the exhaust pipe 1. One end of the guide pipe 14 is located inside the exhaust pipe 1 and is coaxially arranged with the exhaust pipe 1. The end face of the guide pipe 14 is flush with the connection surface of the exhaust pipe 1 and the booster pipe 11. The other end of the guide pipe 14 passes through the side of the exhaust pipe 1. An exhaust centrifugal chamber 3 is connected to the outer end of the guide pipe 14. The size of the other end of the booster pipe 11 is smaller than that of the exhaust pipe 1. An exhaust pipe 12 is provided at the other end of the booster pipe 11. A pressure relief pipe 13 is provided at the other end of the exhaust pipe 12. The pressure relief pipe 13 is mirror image of the exhaust pipe 12. The system is designed to draw air from the application environment to the outside through the exhaust duct 1, and introduce high-speed airflow into one end of the exhaust duct 1 through the air guide pipe 14, creating a negative pressure at one end of the exhaust duct 1 to accelerate the extraction of air from the application environment. Furthermore, the air in contact with the environment is only through the air guide pipe 14, preventing contamination of the exhaust fan by the environment air. The air introduced into the exhaust duct 1 passes through the frustum-shaped booster pipe 11, increasing the outlet pressure and thus increasing the velocity entering the exhaust pipe 12. The gas is then discharged through the pressure relief pipe 13, which relieves pressure on the gas discharged from the exhaust pipe 12. The air is further accelerated by the outlet centrifugal chamber 3, and the high-speed gas is introduced into the interior of the exhaust duct 1 through the air guide pipe 14.

[0025] Please see Figures 1-5A connecting pipe 31 is coaxially arranged above the exhaust centrifugal chamber 3, and an intake centrifugal chamber 32 is coaxially arranged above the connecting pipe 31. The connecting pipe 31 passes through the top surface of the exhaust centrifugal chamber 3 and the bottom surface of the intake centrifugal chamber 32. A first-stage centrifugal turbine 5 is coaxially arranged inside the intake centrifugal chamber 32, and a stabilizing platform 52 is arranged below the first-stage centrifugal turbine 5. Multiple connecting blocks 53 are evenly arranged on the side of the stabilizing platform 52, and the other end of the connecting block 53 is fixed to the inner wall of the intake centrifugal chamber 32. The exhaust centrifugal chamber 3 and the intake centrifugal chamber 32 are connected through the connecting pipe 31. The stabilizing platform 52 is fixed in the intake centrifugal chamber 32 through the connecting blocks 53, thereby providing support for the first-stage centrifugal turbine 5 and allowing the first-stage centrifugal turbine 5 to rotate on the stabilizing platform 52.

[0026] Please see Figures 1-5 The top surface of the intake centrifugal chamber 32 is provided with a limiting platform 33, the side of which is parallel to the side of the first-stage centrifugal turbine 5. An intake pipe 34 is provided above the limiting platform 33. Inside the lower part of the intake centrifugal chamber 32, a first limiting block 54 is provided outside the connecting pipe 31. The side of the first limiting block 54 is parallel to the side of the stabilizing platform 52. There is a gap between the limiting platform 33 and the first-stage centrifugal turbine 5, and there is also a gap between the first limiting block 54 and the stabilizing platform 52. The gas flow path is fixed through the gaps. The rotation of the first-stage centrifugal turbine 5 increases the gas flow rate inside the intake centrifugal chamber 32, making it easier for outside air to enter the intake centrifugal chamber 32 from the intake pipe 34. Through the rotation of the first-stage centrifugal turbine 5, the gas undergoes first-stage centrifugal compression and acceleration in the gap between the limiting platform 33 and the first-stage centrifugal turbine 5, and then enters the connecting pipe 31 through the gap between the first limiting block 54 and the stabilizing platform 52.

[0027] Please see Figures 1-5 The exhaust centrifugal chamber 3 has a two-stage centrifugal turbine 51 coaxially mounted inside. A rotating shaft 56 is coaxially mounted on the bottom surface of the first-stage centrifugal turbine 5, passing through a stabilizing platform 52. A third bearing 58 is installed at the connection between the rotating shaft 56 and the stabilizing platform 52. A second limiting block 55 is installed inside the exhaust centrifugal chamber 3. The side of the second limiting block 55 is parallel to the side of the two-stage centrifugal turbine 51, and the top surface of the second limiting block 55 is connected to the connecting pipe 31. An air guide pipe 14 passes through one side of the second limiting block 55 and is located within the second limiting block 55. Inside; the secondary centrifugal turbine 51 is coaxially arranged with the primary centrifugal turbine 5. After the secondary centrifugal turbine 51 rotates, it drives the primary centrifugal turbine 5 to rotate synchronously through the rotating shaft 56. The rotating shaft 56 can rotate independently of the stable platform 52 through the third bearing 58. There is a gap between the second limiting block 55 and the secondary centrifugal turbine 51. The air that enters the air intake centrifugal chamber 32 from the connecting pipe 31 is subjected to secondary centrifugal compression and speed-up at the secondary centrifugal turbine 51, and the gas after secondary centrifugal compression and speed-up is introduced into the air guide pipe 14.

[0028] Please see Figures 1-5 A baffle 6 is coaxially arranged below the exhaust centrifugal chamber 3. An active turbine chamber 2 is coaxially arranged below the baffle 6. An air turbine 4 is coaxially arranged inside the active turbine chamber 2. The inner side of the active turbine chamber 2 is parallel to the side of the air turbine 4. A connecting platform 41 is arranged above the air turbine 4. A rotating shaft 56 is coaxially arranged on the top surface of the connecting platform 41. The rotating shaft 56 passes through the top surface of the active turbine chamber 2, the baffle 6, and the bottom surface of the exhaust centrifugal chamber 3, and connects to the bottom of the secondary centrifugal turbine 51. The rotating shaft 56 is aligned with the top surface of the active turbine chamber 2. A second bearing 57 is provided; the outlet centrifugal chamber 3 is supported by a partition 6; a gap is left between the active turbine chamber 2 and the pneumatic turbine 4 to fix the air flow path, so that the gas concentrates to drive the pneumatic turbine 4 to rotate. Through the rotation of the pneumatic turbine 4 inside the active turbine chamber 2, the secondary centrifugal turbine 51 is driven to rotate synchronously under the action of the rotating shaft 56, thereby making the pneumatic turbine 4, the secondary centrifugal turbine 51 and the primary centrifugal turbine 5 rotate synchronously, and through the second bearing 57, the rotating shaft 56 can rotate independently of the partition 6.

[0029] Please see Figures 1-5 A vent pipe 23 is provided on one side of the active turbine chamber 2, and the vent pipe 23 is connected to the interior of the active turbine chamber 2. An exhaust seat 24 is provided at the center of the outer side of the bottom surface of the active turbine chamber 2, and the exhaust seat 24 is connected to the interior of the active turbine chamber 2. Multiple exhaust holes 25 are opened on the side of the exhaust seat 24, and a sealing plate 26 is provided on the outer side of the bottom end of the exhaust seat 24. Air is introduced into the interior of the active turbine chamber 2 through the vent pipe 23 to drive the pneumatic turbine 4 to rotate, and the air in the active turbine chamber 2 is discharged through the exhaust holes 25 on the exhaust seat 24.

[0030] Please see Figures 1-5 A balance shaft 42 is coaxially arranged on the bottom surface of the pneumatic turbine 4. A first bearing 43 is arranged at the bottom inside the exhaust seat 24. The first bearing 43 is located outside the balance shaft 42, and the other end of the balance shaft 42 is located inside the sealing plate 26. The pneumatic turbine 4 rotates to drive the balance shaft 42 to rotate synchronously, and the first bearing 43 enables the balance shaft 42 to rotate independently of the exhaust seat 24. The bottom end of the exhaust seat 24 is sealed by the sealing plate 26.

[0031] Please see Figures 1-5 The vent pipe 23 and the air guide pipe 14 are arranged opposite each other; multiple support rods 21 are evenly arranged at the bottom edge of the active turbine housing 2, and a support seat 22 is provided at the other end of the support rod 21; the opposite arrangement of the vent pipe 23 and the air guide pipe 14 makes the space at the port of the vent pipe 23 larger; the active turbine housing 2 is supported by the support rods 21 and the support seat 22.

[0032] During operation, a fan is connected to the port of the vent pipe 23, causing the gas to drive the pneumatic turbine 4 to rotate. The rotation of the pneumatic turbine 4 drives the primary centrifugal turbine 5 and the secondary centrifugal turbine 51 to rotate synchronously. After the primary centrifugal turbine 5 rotates, external gas enters the intake centrifugal chamber 32 through the intake pipe 34, flows along the path between the limiting platform 33 and the primary centrifugal turbine 5, and enters the path between the stabilizing platform 52 and the first limiting block 54. During the rotation of the primary centrifugal turbine 5, the gas undergoes primary centrifugal acceleration. The accelerated gas then enters the intake centrifugal chamber 32 through the connecting pipe 31, flows along the path between the secondary centrifugal turbine 51 and the second limiting block 55, and is further accelerated by the rotation of the secondary centrifugal turbine 51. The gas undergoes a two-stage centrifugal acceleration process, introducing high-speed gas from the air guide pipe 14 into the interior of the exhaust pipe 1. The accelerated gas flow rate is greater than the gas flow rate at the fan output end, ensuring that exhaust pipes of different sizes can achieve the same effect. The air guide pipe 14 ejects a high-speed airflow inside the exhaust pipe 1, creating a negative pressure at one end of the exhaust pipe 1, which drives the gas flow inside the exhaust pipe 1. The pressurization of the booster pipe 11 and the exhaust pipe 12 further accelerates the gas flow inside the exhaust pipe 1. This ensures that the fan operates in a non-working medium environment, reducing the risk of equipment corrosion and high temperatures, decreasing the equipment failure rate, and providing a simple structure for easy maintenance. The air pressure and air volume can be controlled. The fan does not directly contact the working medium, achieving the dual effects of energy saving and environmental protection.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 non-contact air intake structure, comprising an air intake pipe (1), characterized in that: A booster pipe (11) is provided at one end of the induced draft pipe (1). The size of one end of the booster pipe (11) is the same as that of the induced draft pipe (1). A guide pipe (14) is provided on one side of the induced draft pipe (1). One end of the guide pipe (14) is located inside the induced draft pipe (1) and is coaxially arranged with the induced draft pipe (1). The end face of the guide pipe (14) is flush with the connection surface of the induced draft pipe (1) and the booster pipe (11). The other end of the guide pipe (14) passes through the side of the induced draft pipe (1). An exhaust centrifugal chamber (3) is connected to one end of the guide pipe (14) outside the induced draft pipe (1). The size of the other end of the booster pipe (11) is smaller than that of the induced draft pipe (1). An exhaust pipe (12) is provided at the other end of the booster pipe (11). A pressure relief pipe (13) is provided at the other end of the exhaust pipe (12). The pressure relief pipe (13) is mirrored with the exhaust pipe (12).

2. The touchless wind inducing structure of claim 1, wherein: A connecting pipe (31) is coaxially arranged above the exhaust centrifugal chamber (3), and an intake centrifugal chamber (32) is coaxially arranged above the connecting pipe (31). The connecting pipe (31) passes through the top surface of the exhaust centrifugal chamber (3) and the bottom surface of the intake centrifugal chamber (32). A first-stage centrifugal turbine (5) is coaxially arranged inside the intake centrifugal chamber (32). A stabilizing platform (52) is arranged below the first-stage centrifugal turbine (5). Multiple connecting blocks (53) are evenly arranged on the side of the stabilizing platform (52). The other end of the connecting block (53) is fixed to the inner wall of the intake centrifugal chamber (32).

3. The touchless wind directing structure of claim 2, wherein: The top surface of the intake centrifugal chamber (32) is provided with a limiting platform (33), the side of the limiting platform (33) is parallel to the side of the first-stage centrifugal turbine (5), and an intake pipe (34) is provided above the limiting platform (33); a first limiting block (54) is provided inside the lower part of the intake centrifugal chamber (32) on the outside of the connecting pipe (31), and the side of the first limiting block (54) is parallel to the side of the stabilizing platform (52).

4. The touchless wind directing structure of claim 3, wherein: The exhaust centrifugal chamber (3) is coaxially equipped with a secondary centrifugal turbine (51), and a rotating shaft (56) is coaxially equipped on the bottom surface of the primary centrifugal turbine (5). The rotating shaft (56) passes through the stabilizing platform (52), and a third bearing (58) is provided at the connection between the rotating shaft (56) and the stabilizing platform (52). The exhaust centrifugal chamber (3) is equipped with a second limiting block (55). The side of the second limiting block (55) is parallel to the side of the secondary centrifugal turbine (51), and the top surface of the second limiting block (55) is connected to the connecting pipe (31). The air guide pipe (14) passes through one side of the second limiting block (55) and is located inside the second limiting block (55).

5. The touchless wind directing structure of claim 4, wherein: A partition (6) is coaxially arranged below the exhaust centrifugal chamber (3), and an active turbine chamber (2) is coaxially arranged below the partition (6). An aerodynamic turbine (4) is coaxially arranged inside the active turbine chamber (2). The inner side of the active turbine chamber (2) is parallel to the side of the aerodynamic turbine (4). A connecting platform (41) is arranged above the aerodynamic turbine (4). A rotating shaft (56) is coaxially arranged on the top surface of the connecting platform (41). The rotating shaft (56) passes through the top surface of the active turbine chamber (2), the partition (6), and the bottom surface of the exhaust centrifugal chamber (3) and is connected to the bottom of the secondary centrifugal turbine (51). A second bearing (57) is arranged between the rotating shaft (56) and the top surface of the active turbine chamber (2).

6. The touchless wind directing structure of claim 5, wherein: A vent pipe (23) is provided on one side of the active turbine chamber (2), and the vent pipe (23) is connected to the interior of the active turbine chamber (2); an exhaust seat (24) is provided at the center of the outer side of the bottom surface of the active turbine chamber (2), and the exhaust seat (24) is connected to the interior of the active turbine chamber (2); multiple exhaust holes (25) are opened on the side of the exhaust seat (24), and a sealing plate (26) is provided on the outer side of the bottom end of the exhaust seat (24).

7. The non-contact air extraction structure according to claim 6, characterized in that: The bottom surface of the pneumatic turbine (4) is coaxially provided with a balance shaft (42), and the bottom of the exhaust seat (24) is provided with a first bearing (43). The first bearing (43) is located outside the balance shaft (42), and the other end of the balance shaft (42) is located inside the sealing plate (26).

8. The non-contact air extraction structure according to claim 7, characterized in that: The vent pipe (23) and the air guide pipe (14) are arranged opposite to each other; multiple support rods (21) are evenly arranged at the bottom edge of the active turbine compartment (2), and a support seat (22) is provided at the other end of the support rod (21).

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