Air pipe check valve and air pipe elbow integrated structure and installation method thereof

Abstract

The invention discloses an air pipe check valve and air pipe elbow integrated structure and an installation method thereof, and relates to the technical field of mechanical and electrical installing.The air pipe check valve and air pipe elbow integrated structure comprises an air pipe body, an opening and closing mechanism, a gas flow direction sensor, a driving mechanism and a protective shell, and the opening and closing mechanism comprises multiple sets of movable flow deflectors, sealing rubber rings and rotating arms; the flow deflectors are designed in an aerodynamic airfoil shape. The non-return function and the air pipe elbow are integrally designed, an installation space does not need to be additionally reserved for an independent non-return valve, a compact layout scene between building equipment is perfectly adapted, and the problem that a traditional non-return valve is forced to be installed on a vertical pipe due to space limitation is solved; and meanwhile, through the installation method of modular prefabrication and step-by-step assembly, the assembly process is simplified, it is guaranteed that the first air pipe elbow, the second air pipe elbow, the opening and closing mechanism, the driving mechanism and other assemblies are in accurate butt joint, and the installation efficiency and the overall structure stability are improved.

Description

Technical Field

[0001] This invention relates to the field of electromechanical installation technology, specifically to an integrated structure of a duct check valve and a duct elbow, and its installation method. Background Technology

[0002] In the field of building electromechanical installation, duct systems, as the core carriers for realizing functions such as ventilation and air conditioning, directly affect the overall building's energy consumption level and user experience through their operational efficiency and installation rationality. Duct check valves, as key components ensuring unidirectional airflow and preventing turbulent backflow in duct systems, are crucial to system stability through their installation methods and performance.

[0003] Currently, with the diversification of building functions and the continuous improvement of space utilization requirements, the layout of building equipment rooms is becoming increasingly compact, and the space available for the installation of air ducts and auxiliary components is being significantly compressed. In actual installation, in most scenarios, there is not enough space to install the air duct check valve in the horizontal pipe section according to the ideal working conditions, and it can only be installed in the vertical pipe direction. However, the working principle of the traditional air duct check valve relies on the balance between airflow pressure and gravity. When installed in a vertical pipe, the valve core will be permanently closed due to the continuous action of gravity. In order for the check valve to open normally and realize airflow, it is necessary to rely on the fan to provide a large amount of additional air pressure to overcome the gravity resistance. This process will cause serious air pressure loss.

[0004] To compensate for the insufficient system efficiency caused by wind pressure loss, projects have to select wind turbines with higher wind pressure. This not only directly leads to a significant increase in equipment procurement costs, but also a substantial increase in energy consumption during wind turbine operation, which goes against the development trend of building energy conservation. At the same time, excessive wind pressure demand may also cause problems such as airflow turbulence and increased aerodynamic noise in the duct system, affecting the stability of system operation. Long-term operation will also accelerate the wear and tear of wind turbine and duct components, shortening the service life of the equipment.

[0005] Furthermore, in traditional duct systems, check valves and duct elbows are independent components. Their installation further occupies space, and the elbows themselves are prone to eddies and energy losses due to airflow deflection. When combined with the pressure loss of the check valve, this leads to a significant decrease in the overall system efficiency. Existing technologies lack an integrated solution that can take into account space adaptability, check function, and energy-saving requirements. They cannot effectively solve the gravity interference problem of installing check valves in vertical pipes, nor can they achieve dynamic adaptation and energy efficiency optimization during airflow. Therefore, an innovative technical solution is urgently needed to overcome the above-mentioned industry bottlenecks. Summary of the Invention

[0006] Based on this, the purpose of the present invention is to provide an integrated structure of duct check valve and duct elbow and its installation method, so as to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an integrated structure of a duct check valve and a duct elbow, comprising a duct body, an opening and closing mechanism, a gas flow direction sensor, a drive mechanism, and a protective shell;

[0008] The interface shape and size of the first and second duct elbows are compatible, and the inner walls of both are smooth curved surfaces to reduce airflow resistance.

[0009] The duct body is composed of a first duct elbow and a second duct elbow spliced ​​together. A sealing gasket is provided at the splice point and it is locked and fixed by multiple sets of fastening bolts. The opening and closing mechanism, gas flow direction sensor and drive mechanism are all assembled inside the duct body.

[0010] The opening and closing mechanism includes multiple sets of movable guide vanes, sealing rings, and rotating arms;

[0011] The guide vane adopts an aerodynamic airfoil design. The sealing ring is fixed to the outer edge of each group of guide vanes and is made of flexible material, which can be passively squeezed and deformed when the guide vane is closed. The rotating arm is fixed to both ends of the guide vane and a transmission groove is opened on the inner side of the rotating arm.

[0012] The drive mechanism includes a motor, transmission column, insertion column, gear, limit wheel, synchronous belt, control module, and mounting bracket;

[0013] The mounting bracket is fixed to the outside of the first duct elbow, and the motor is mounted on the mounting bracket; the transmission column is rotatably connected to the outside of the first duct elbow, and a gear is fixed to its outside; the output end of the motor is connected to the gears of multiple sets of transmission columns through a synchronous belt.

[0014] The inner side of the transmission column is provided with a plug-in post, which is plugged into the transmission groove of the rotating arm to form a transmission connection.

[0015] The limiting wheel is rotatably connected to the outside of the first duct elbow to limit the timing belt;

[0016] The gas flow direction sensor is a high-precision sensor used to monitor the direction, velocity and stability of the airflow inside the duct in real time, and convert the monitoring data into electrical signals to be transmitted to the control module;

[0017] The control module has a built-in microprocessor and an integrated intelligent judgment algorithm, which is used to receive the electrical signal from the gas flow direction sensor and judge the airflow condition, and then output the corresponding control command to the motor.

[0018] Multiple sets of the aforementioned guide vanes can be synchronously adjusted in angle under the drive of the drive mechanism, with an adjustment range of 0°-90°, where 0° corresponds to the guide vanes being fully open and 90° corresponds to the guide vanes being fully closed.

[0019] The drive mechanism also includes a connector, which is fixed to the control module and used for electrical connection with external power supply equipment;

[0020] The protective outer shell is installed on the outside of the drive mechanism and is detachably connected to the air duct body.

[0021] An installation method for an integrated structure of a duct check valve and a duct elbow includes the following steps:

[0022] S1: Prefabricate the first duct elbow, the second duct elbow, and all components to ensure that the interface dimensions of the first duct elbow and the second duct elbow match, and that the assembly precision of the components of the opening and closing mechanism and the drive mechanism meets the requirements.

[0023] S2: Fix the gas flow direction sensor in the preset installation position inside the duct body, ensuring that the sensor's monitoring end faces the direction of airflow;

[0024] S3: Connect the guide vane of the opening and closing mechanism to the transmission column of the drive mechanism through the rotating arm to complete the transmission connection. Then fix the drive mechanism to the outer wall of the first duct elbow through the mounting bracket.

[0025] S4: The protective housing is placed on the outside of the drive mechanism, and the protective housing is fixed to the first duct elbow with bolts to protect the drive mechanism;

[0026] S5: Place a sealing gasket at the joint of the first duct bend and the second duct bend, align the two interfaces, and then use multiple sets of fastening bolts to tighten them evenly in the circumferential direction to complete the assembly of the duct body.

[0027] S6: Connect the control module to the motor and gas flow sensor electrically, and debug the equipment to ensure that all components work together normally.

[0028] In summary, the present invention has the following main beneficial effects:

[0029] 1. This invention integrates the check valve function with the duct elbow design, eliminating the need for additional installation space for a separate check valve. It perfectly adapts to the compact layout of building equipment rooms, solving the problem that traditional check valves are forced to be installed on vertical pipes due to space constraints. At the same time, the modular prefabrication and step-by-step assembly method simplifies the assembly process, ensuring precise connection of components such as the first duct elbow, the second duct elbow, the opening and closing mechanism, and the drive mechanism, thereby improving installation efficiency and overall structural stability.

[0030] 2. This invention utilizes a gas flow direction sensor for real-time monitoring and intelligent control module adjustment. The guide vane can dynamically adjust its angle according to the airflow conditions—opening to a suitable angle when the wind is downwind to guide the airflow smoothly, reducing eddy current and resistance losses, and eliminating the need to rely on a high-pressure fan to compensate for energy consumption; and quickly closing to form a seal when the wind is upwind to avoid energy waste caused by airflow backflow. Compared with traditional systems that install check valves in vertical pipes, this invention significantly reduces the fan operating power and overall energy consumption, meeting the requirements of building energy conservation.

[0031] 3. This invention forms a reliable seal when the guide vanes are closed using a flexible sealing ring, blocking interference from reverse airflow; the limit wheel in the drive mechanism limits the rotation angle of the transmission column, and the synchronous belt ensures that multiple sets of guide vanes work together to avoid airflow turbulence and equipment vibration; the protective shell provides effective protection for the drive mechanism, reduces component wear, comprehensively improves the operational stability of the duct system, and extends the service life of fans, pipes and other equipment.

[0032] 4. This invention, through the intelligent judgment algorithm built into the control module and combined with the real-time data of the high-precision gas flow direction sensor, can automatically identify changes in airflow direction and velocity and adjust the state of the guide vane without manual intervention; the guide vane's adjustment range of °-° can adapt to different operating conditions of flow and pressure, and compared with traditional fixed structure check valves, it has stronger adaptability to operating conditions and intelligent control capabilities. Attached Figure Description

[0033] Figure 1 This is a first-view structural diagram of the entire invention;

[0034] Figure 2 This is a cross-sectional view of the invention in its closed state;

[0035] Figure 3 This is an enlarged view of the internal structure of the present invention;

[0036] Figure 4 For the present invention Figure 3 Enlarged view of point A;

[0037] Figure 5 This is an enlarged exploded view of a portion of the structure of the present invention;

[0038] Figure 6 This is a cross-sectional view of the invention in the open state;

[0039] Figure 7 This is a second-view structural diagram of the entire invention.

[0040] In the diagram: 1. First duct elbow; 2. Second duct elbow; 3. Opening and closing mechanism; 301. Guide vane; 302. Sealing ring; 303. Rotating arm; 304. Transmission groove; 4. Gas flow direction sensor; 5. Drive mechanism; 501. Motor; 502. Transmission column; 503. Insertion column; 504. Gear; 505. Limit wheel; 506. Synchronous belt; 507. Control module; 508. Connector; 509. Mounting bracket; 6. Protective housing. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] The embodiments of the present invention will now be described.

[0043] Example

[0044] like Figure 1-7 As shown, the first duct elbow 1 and the second duct elbow 2 are prefabricated according to the preset design specifications. At the same time, the processing and manufacturing of various components such as the opening and closing mechanism 3, the gas flow direction sensor 4, the drive mechanism 5, and the protective shell 6 are completed to ensure that the interface shape and size of the first duct elbow 1 and the second duct elbow 2 are completely compatible. The assembly accuracy of the guide plate 301, the sealing ring 302, and the rotating arm 303 in the opening and closing mechanism 3, as well as the matching accuracy of the motor 501, the transmission column 502, the gear 504, and other components in the drive mechanism 5, all meet the installation requirements.

[0045] The gas flow direction sensor 4 is fixed in a preset installation position inside the duct body to ensure that the sensor's monitoring end is accurately facing the direction of airflow, so as to ensure that the relevant state parameters of the airflow in the duct can be captured in real time.

[0046] The guide vane 301 of the opening and closing mechanism 3 is connected to the transmission column 502 of the drive mechanism 5 through the rotating arms 303 at both ends, so that the insertion post 503 on the inner side of the transmission column 502 is precisely inserted into the transmission groove 304 opened on the inner side of the rotating arm 303, thus completing the transmission connection between the two; then, the drive mechanism 5 is fixed to the outer wall of the first duct elbow 1 through the mounting bracket 509 to ensure that the drive mechanism 5 is firmly installed and in a stable position.

[0047] The protective housing 6 is placed on the outside of the drive mechanism 5, and the protective housing 6 is fastened to the first duct elbow 1 by bolts to achieve sealed protection of the drive mechanism 5 and prevent external dust, impurities and other contaminants from affecting the internal components.

[0048] Place a sealing gasket at the joint of the first duct elbow 1 and the second duct elbow 2. After aligning the interfaces of the two, distribute multiple sets of fastening bolts evenly along the circumference and tighten them one by one to complete the assembly of the duct body, ensure the sealing of the joint, and prevent air leakage.

[0049] The control module 507 is electrically connected to the motor 501 and the gas flow direction sensor 4, and an electrical connection is established with the external power supply equipment through the connector 508 on the control module 507 to provide working power for the entire device. After the connection is completed, the device is debugged to ensure that the components work together normally.

[0050] The working principle of this invention is as follows: the first duct elbow 1 and the second duct elbow 2 together form the duct body, a sealing gasket is provided between them, and they are locked by multiple sets of fastening bolts.

[0051] A high-precision gas flow direction sensor 4 is installed inside the duct body. This sensor continuously captures the airflow parameters flowing through the bend, including airflow direction, flow rate and stability. It converts the monitoring data into electrical signals in real time and transmits them to the control unit, providing accurate basis for subsequent control and ensuring rapid response to changes in airflow status.

[0052] Equipped with a control module 507, which has a built-in microprocessor or PLC as a central control unit and an intelligent judgment algorithm, the control unit receives real-time data transmitted from the sensors and quickly analyzes the current airflow conditions.

[0053] When the airflow direction is detected to be consistent with the mainstream direction of the duct system and the airflow is stable, it is determined to be a "tailwind" condition.

[0054] When reverse airflow or strong unstable vortex is detected, it is determined to be a "headwind" condition.

[0055] Based on the working condition judgment result, the control module 507 generates the corresponding control command in real time and outputs it to the motor 501 of the drive mechanism 5.

[0056] The duct body is equipped with multiple sets of movable airfoil-shaped guide vanes 301. The guide vanes 301 are connected to the drive mechanism 5 via rotating arms 303. The core operating logic is as follows:

[0057] In a tailwind condition: the control module 507 issues an "open" command, and the drive mechanism 5 drives multiple sets of guide vanes 301 to rotate to an angle that is coordinated with the airflow direction (the surface of the guide vane 301 forms a small angle of attack with the airflow), guiding the airflow smoothly through the bend, reducing the generation of eddies, and reducing airflow resistance and energy loss;

[0058] In headwind conditions: When the control module 507 issues a "shut down" or "protect" command, the drive mechanism 5 quickly rotates the guide vane 301 to a position almost perpendicular to the direction of the incoming flow, forming an airflow barrier to block the reverse flow and prevent the backflow from interfering with the upstream flow field and causing equipment vibration.

[0059] Specifically, the transmission groove 304 on the inner side of a set of rotating arms 303 on one side of the guide vane 301 is connected to the insertion post 503 in the transmission post 502 to complete the transmission connection. Then, the motor output end meshes with the gears 504 fixed on the outer side of multiple sets of transmission posts 502 through the synchronous belt 506, so that the multiple sets of guide vanes 301 can be driven to perform overall synchronous angle adjustment under the action of the motor 501.

[0060] Meanwhile, each set of guide vanes 301 is fixed with a sealing ring 302 on the outside. The sealing ring 302 is made of flexible material, which can ensure that when multiple sets of guide vanes 301 are in a closed state, the sealing ring 302 can be passively squeezed and deformed to a certain extent to form a stable and sealed closed structure.

[0061] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An integrated structure of a wind pipe check valve and a wind pipe elbow, characterized by comprising: a wind pipe check valve; a wind pipe elbow; and a connecting member which connects the wind pipe check valve and the wind pipe elbow. The air pipe body is composed of a first air pipe elbow (1) and a second air pipe elbow (2), and a sealing gasket is arranged at the joint of the two, and the joint is locked and fixed by a plurality of fastening bolts. The opening and closing mechanism (3) includes a plurality of movable guide vanes (301), a sealing rubber ring (302) and a rotating arm (303).

2. The integrated structure of the duct check valve and the duct elbow according to claim 1, characterized in that: The guide vane (301) is designed in an aerodynamic airfoil shape, the sealing rubber ring (302) is fixed to the outer edge of each group of guide vanes (301), and the sealing rubber ring (302) is made of flexible material and can be passively extruded and deformed when the guide vane (301) is closed. The driving mechanism (5) includes a motor (501), a transmission column (502), a plug-in column (503), a gear (504), a limiting wheel (505), a synchronous belt (506), a control module (507) and a mounting bracket (509).

3. The integrated structure of the duct check valve and the duct elbow according to claim 2, characterized in that: The mounting bracket (509) is fixed to the outside of the first air pipe elbow (1), and the motor (501) is assembled on the mounting bracket (509); the transmission column (502) is rotatably connected to the outside of the first air pipe elbow (1), and a gear (504) is fixed to the outside of the transmission column (502); the output end of the motor (501) is connected with the gears (504) of the plurality of transmission columns (502) through the synchronous belt (506). The plug-in column (503) is arranged on the inside of the transmission column (502), and the plug-in column (503) and the transmission groove (304) of the rotating arm (303) are inserted and matched to form a transmission connection. The limiting wheel (505) is rotatably connected to the outside of the first air pipe elbow (1) and is used to limit the synchronous belt (506). The gas flow direction sensor (4) is a high-precision sensor for real-time monitoring of the direction, flow rate and stability of the airflow in the air pipe body, and converting the monitoring data into an electrical signal and transmitting it to the control module.

4. The duct check valve and duct elbow integrated structure according to claim 1, characterized in that: The control module (507) has a built-in microprocessor and an integrated intelligent judgment algorithm for receiving the electrical signal of the gas flow direction sensor and judging the airflow condition, and then outputting corresponding control instructions to the motor (501).

5. The integrated structure of the duct check valve and the duct elbow according to claim 3, characterized in that: The interfaces of the first air pipe elbow (1) and the second air pipe elbow (2) are compatible in shape and size, and the inner walls of the two are smooth curved surface structures for reducing airflow resistance.

6. The duct check valve and elbow integrated structure according to claim 1, characterized in that: A plurality of guide vanes (301) can be synchronously adjusted in angle under the driving of the driving mechanism (5), and the adjustment range is 0°-90°, wherein 0° corresponds to the completely open state of the guide vane (301), and 90° corresponds to the completely closed state of the guide vane (301).

7. The integrated structure of the duct check valve and the duct elbow according to claim 2, characterized in that: ​ 8. The integrated structure of the duct check valve and the duct elbow according to claim 3, characterized in that: The driving mechanism (5) further comprises a connecting head (508) fixed on the control module (507) and used for electrically connecting with an external power supply device.

9. A method of installing a duct check valve integrated with a duct elbow, characterized by The wind pipe check valve integrated structure of the wind pipe elbow according to any one of claims 1-8 comprises the following steps: S1: prefabricating the first wind pipe elbow (1), the second wind pipe elbow (2) and each component, ensuring that the interface sizes of the first wind pipe elbow (1) and the second wind pipe elbow (2) are matched, and the assembly precision of the parts of the opening and closing mechanism (3) and the driving mechanism (5) meets the requirements; S2: fixing the gas flow direction sensor (4) at a preset mounting position inside the wind pipe body, and ensuring that the monitoring end of the sensor faces the gas flow direction; S3: inserting and connecting the guide vane (301) of the opening and closing mechanism (3) and the transmission column (502) of the driving mechanism (5) through the rotating arm (302), fixing the driving mechanism (5) to the outer wall of the first wind pipe elbow (1) through the mounting frame (501) after the transmission connection is completed; S4: covering the protection shell (6) outside the driving mechanism (5), fixing the protection shell (6) and the first wind pipe elbow (1) through bolts, and realizing the protection of the driving mechanism (5); S5: placing a sealing gasket at the splicing position of the first wind pipe elbow (1) and the second wind pipe elbow (2), aligning the interfaces of the two, and uniformly locking along the circumference by using multiple fastening bolts to complete the assembly of the wind pipe body; S6: electrically connecting the control module (507) with the motor (501) and the gas flow direction sensor (4), and debugging the device to ensure that each component works normally.

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