Air volume cover adaptive to ventilation openings of multiple sizes

Abstract

The utility model belongs to the technical field of air circulation and environment monitoring equipment, and particularly relates to an air volume cover adaptive to ventilation openings of multiple sizes, which comprises a fixed cover, a flow guide pipe, an expansion cover, a locking piece and a positioning piece, the fixed cover is trumpet-shaped, one end of the fixed cover is connected with the flow guide pipe, and the other end is connected with the expansion cover through the locking piece, so that the fixed cover can adapt to ventilation pipelines with different sizes; the joint of the fixed cover and the expansion cover is tightly matched with a locking piece through a sealing frame, so that the air tightness of the device is ensured; a limiting ring is arranged on the inner side of the flow guide pipe and used for installing an impeller type anemograph, a clamping groove is formed in the fixing cover and used for installing a hot-wire type anemograph, and rapid switching and stable installation of different anemographs are achieved. A holding piece and a handle are arranged at the bottom of the fixed cover, so that user operation and equipment holding are facilitated, and measurement convenience and accuracy are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air circulation and environment monitoring equipment, and particularly relates to an air volume hood adapted to vents of multiple sizes. Background Art

[0002] In the field of ventilation, air conditioning, and air circulation management, accurate measurement of air volume is of great significance for optimizing equipment efficiency and ensuring air quality. Currently, there are a variety of air volume measurement devices on the market for vents of different sizes, the most common of which include hot wire anemometers and impeller anemometers. However, traditional air volume hoods have limitations in adapting to various vent sizes and compatibility with different types of anemometers. Generally, users need to replace air volume hoods of different specifications or perform additional modifications according to different anemometers to meet measurement requirements. This not only increases the complexity of equipment use, but also leads to inconvenience in operation, making it difficult to achieve quick and efficient installation and disassembly.

[0003] Existing air flow hoods typically only fit vents of specific sizes and lack the flexibility to accommodate ducts of varying sizes. When measuring air flow, operators may need to replace the corresponding air flow hood for each vent, requiring multiple installation and commissioning steps, which is time-consuming. Furthermore, existing technologies lack effective solutions for compatibility with different types of anemometers, particularly hot-wire and vane-type anemometers. This results in inefficient equipment and an inability to meet diverse measurement needs. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide an air volume hood that is adaptable to vents of multiple sizes. It can adapt to vents of different sizes and achieve rapid switching between hot wire and impeller anemometers.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An air volume hood adapted to vents of various sizes, comprising a fixed hood, the fixed hood being shaped like a trumpet, one end of the fixed hood being fixedly connected to a flow guide pipe, and the other end of the fixed hood being connected to an expansion hood;

[0007] A locking piece is provided between the fixed cover and the expansion cover for connecting them;

[0008] A positioning piece for fixing the detector is fixedly connected inside the fixed cover.

[0009] Furthermore, a first sealing frame is fixedly connected to the outer side of the flared end of the fixed cover;

[0010] The outer side of the closing end of the expansion cover is fixedly connected with a second sealing frame that fits with the first sealing frame;

[0011] Both ends of the first sealing frame are fixedly connected with a first fastening member, and a first limiting groove is formed through the side surface of the first fastening member, and the shape of the first limiting groove is U-shaped;

[0012] Both ends of the second sealing frame are symmetrically fixedly connected with pin-connecting plates;

[0013] The locking member is rotatably connected to the pin plate;

[0014] The fixing cover and the expansion cover are tightly connected by the mutual engagement between the locking member and the first buckling member.

[0015] Furthermore, the locking member includes a threaded column rotatably connected to the pin plate, and a positioning hole is formed through the outer side of one end of the threaded column;

[0016] The threaded column is connected with a butterfly nut.

[0017] Furthermore, a third sealing frame is fixedly connected to the outer side of the flared end of the expansion cover, and both ends of the third sealing frame are fixedly connected to a second fastening piece. A second limiting groove is opened through the second fastening piece, and the shape of the second limiting groove is U-shaped.

[0018] Furthermore, a trumpet ring is fixedly connected to the outer side of one end of the guide tube, and a limiting ring is fixedly connected to the inner side of the guide tube, and a through hole is penetrated through the side surface of the limiting ring.

[0019] Furthermore, the positioning member includes a column with one end connected to the inner wall of the fixed cover, the top of the column is fixedly connected to a clamping plate, and a clamping slot is formed through the side of the clamping plate.

[0020] Furthermore, a gripping piece is fixedly connected to the bottom of the fixed cover, and a handle is sleeved on the gripping piece.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] This air volume hood adapts to vents of various sizes. By configuring expansion hoods and locking components of varying sizes, it is compatible with a variety of ventilation ducts, allowing users to select the appropriate size based on their measurement needs. Compared to traditional single-size air volume hoods, this avoids the inconvenience of frequent equipment changes and significantly improves work efficiency. Furthermore, the tight fit between the expansion hood and the fixed hood, through the sealing frame and locking components, ensures airtightness, effectively preventing data errors caused by air leakage during measurement, thereby achieving accurate and stable air volume measurement.

[0023] This device is compatible with both hot-wire and vane anemometers, allowing users to select different anemometer types as needed. When using a hot-wire anemometer, the probe is secured using the positioning element's slot structure. When using a vane anemometer, the vane anemometer is inserted into the device via the retaining ring and through-hole in the guide tube. This design effectively addresses the problem of traditional air volume hoods being limited to a single type of anemometer, making the device more versatile and meeting diverse testing needs.

[0024] The grip and handle at the bottom of the fixed cover provide a comfortable grip, allowing users to stabilize the device during operation, significantly improving operational comfort, especially during long measurements. Furthermore, the trumpet-shaped fixed cover design and the flow guide tube ensure smoother airflow to the anemometer. Combined with the flow guidance provided by the trumpet ring, the airflow entering the detection area is more stable, ensuring accurate data measurement.

[0025] To sum up, the structural design of the present invention has significant improvements in adapting to vents of different specifications, being compatible with multiple types of anemometers, improving operational convenience and sealing, etc., meeting various needs in the existing technology, and effectively solving the shortcomings of existing air volume hoods in adaptability, sealing and operational convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the utility model;

[0027] Figure 2 This is a structural diagram of the fixed cover of the utility model;

[0028] Figure 3 This is a schematic structural diagram of the positioning member of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the expansion cover of the utility model;

[0030] Figure 5 for Figure 4 Enlarged schematic diagram of point A in the middle.

[0031] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0032] 1. Fixed cover;

[0033] 11. First sealing frame; 12. First fastening member; 121. First limiting groove;

[0034] 2. Draft tube;

[0035] 21. Speaker ring; 22. Limiting ring; 221. Through hole;

[0036] 3. Grip; 31. Handle;

[0037] 4. Expansion cover;

[0038] 41. Second sealing frame; 411. Pin-jointed plate; 42. Third sealing frame; 43. Second fastening member; 431. Second limiting groove;

[0039] 5. Positioning parts;

[0040] 51, column; 52, card plate; 521, card slot;

[0041] 6. Locking parts;

[0042] 61. Threaded column; 611. Positioning hole; 62. Butterfly nut. DETAILED DESCRIPTION

[0043] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0044] See Figure 1-5 , a wind volume hood adapted to vents of multiple sizes, comprises a fixed hood 1, the shape of the fixed hood 1 is set to be trumpet-shaped, so as to adapt to ventilation ducts of different diameters and achieve better air circulation effect; one end of the fixed hood 1 is fixedly connected to a guide pipe 2, which is used to guide the airflow to the detector and accurately conduct the airflow while ensuring flow stability; the other end of the fixed hood 1 is connected to an expansion hood 4, which can be replaced to adapt to ventilation ducts of different sizes according to the size of the ventilation duct, thereby achieving multi-size adaptation; a locking member 6 for tightly connecting the two is provided between the fixed hood 1 and the expansion hood 4, the locking member 6 ensures the sealing between the fixed hood 1 and the expansion hood 4, effectively prevents airflow leakage, and ensures measurement accuracy; a positioning member 5 for fixing the detector is fixedly connected to the inside of the fixed hood 1, and the positioning member 5 is used to firmly install the anemometer detection probe to prevent displacement during the detection process.

[0045] See Figure 2-5The outer side of the flared end of the fixed cover 1 is fixedly connected with a first sealing frame 11, and the first sealing frame 11 provides a sealing function to ensure the airtightness of the connection position; the outer side of the closed end of the expansion cover 4 is fixedly connected with a second sealing frame 41 that fits with the first sealing frame 11, and the second sealing frame 41 ensures that the connection part of the expansion cover 4 and the fixed cover 1 is tightly fitted; both ends of the first sealing frame 11 are fixedly connected with a first fastener 12, and a first limiting groove 121 is opened through the side of the first limiting groove 12 1 is in the shape of a U, which is used to firmly snap the locking member 6 into place to achieve a quick and convenient connection; both ends of the second sealing frame 41 are symmetrically fixedly connected with pin plates 411, which are used to install the locking member 6 to ensure a stable connection between the expansion cover 4 and the fixed cover 1; the locking member 6 is rotatably connected to the pin plates 411, and the mutual engagement between the locking member 6 and the first buckle 12 can form a stable sealing state between the fixed cover 1 and the expansion cover 4 during use, thereby avoiding airflow leakage that affects the accuracy of the measurement results.

[0046] See Figure 4-5 The locking member 6 includes a threaded column 61 rotatably connected to the pin plate 411. The design of the threaded column 61 allows the locking member 6 to be easily rotated and adjusted during the connection process to achieve a more precise fixing effect; a positioning hole 611 is opened through the outer side of one end of the threaded column 61. The positioning hole 611 helps to ensure that the position of the threaded column 61 is fixed during assembly to prevent the locking member 6 from loosening; a butterfly nut 62 is connected to the threaded column 61. By tightening the butterfly nut 62, the locking member 6 can be fixed, thereby ensuring a stable connection between the fixed cover 1 and the expansion cover 4.

[0047] See Figure 4 A third sealing frame 42 is fixedly connected to the outside of the flared end of the expansion cover 4, and the third sealing frame 42 further enhances the sealing effect to ensure that the connection part with the ventilation duct to be measured is leak-proof; both ends of the third sealing frame 42 are fixedly connected to a second fastening piece 43, and a second limiting groove 431 is opened through the second fastening piece 43. The shape of the second limiting groove 431 is U-shaped and is designed to be used for inserting the connecting part of the locking piece 6, which facilitates the rapid assembly and disassembly of the expansion cover 4 and improves the utilization efficiency of the equipment.

[0048] See Figure 1A horn ring 21 is fixedly connected to the outside of one end of the guide tube 2. The horn ring 21 can guide the airflow, making the airflow entering the guide tube 2 more stable, thereby ensuring the accuracy of the measurement; a limit ring 22 is fixedly connected to the inner side of the guide tube 2. The limit ring 22 provides a fixed position for installing the anemometer, ensuring the stability of the anemometer installation and avoiding deviation during the measurement process; a through hole 221 is opened on the side of the limit ring 22, and the through hole 221 is used to connect to the plug of the impeller anemometer when installing it, ensuring that the anemometer is firmly installed while allowing the airflow to pass through the detection area smoothly.

[0049] See Figure 3 The positioning member 5 includes a column 51 whose one end is connected to the inner wall of the fixed cover 1. The column 51 is used to support the detector's card plate 52 to ensure that the detector is fixed in the fixed cover 1; the top of the column 51 is fixedly connected to the card plate 52, and the side of the card plate 52 is penetrated by a card slot 521. The design of the card slot 521 enables the probe of the hot wire anemometer to be firmly inserted, thereby realizing a stable connection between the probe and the air volume hood, ensuring the accuracy of data measurement and the convenience of equipment operation.

[0050] See Figure 1-2 A gripping piece 3 is fixedly connected to the bottom of the fixed cover 1. The gripping piece 3 is used to facilitate the operator to hold the device during the measurement process, making the operation of the entire device more stable; a handle 31 is provided on the gripping piece 3, and the handle 31 provides a better grip, improves the portability and operating comfort of the device, and thus reduces the fatigue caused by long-term measurement.

[0051] The working principle of this utility model is:

[0052] When using, you can choose a hot wire anemometer or a vane anemometer according to the measurement requirements;

[0053] However, when a hot-wire anemometer is needed, it is only necessary to snap its probe into the slot 521 provided on the card plate 52;

[0054] When the impeller anemometer is needed, it is only necessary to insert it into the limiting ring 22 provided in the guide tube 2, and connect it to the plug on the anemometer through the through hole 221 provided on the limiting ring 22, and then install it on the limiting ring 22;

[0055] After the anemometer is installed, just connect the flared end of the fixed cover 1 to the ventilation duct to be measured. If you need to measure ventilation ducts of different specifications, you need to install expansion covers 4 of different sizes on the fixed cover 1 and connect one end of the expansion cover 4 to the ventilation duct to be measured.

[0056] When connecting the expansion cover 4 with the fixed cover 1, it is necessary to fit the second sealing frame 41 with the first sealing frame 11, and let the threaded column 61 be inserted into the first limiting groove 121, and then tighten the butterfly nut 62. As the butterfly nut 62 is tightened, the fixed cover 1 and the expansion cover 4 will be tightly connected.

[0057] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An air volume hood adapted to vents of various sizes, characterized by: The fixed cover (1) comprises a trumpet-shaped fixed cover (1), one end of which is fixedly connected to a flow guide pipe (2); and the other end of the fixed cover (1) is connected to an expansion cover (4). A locking member (6) is provided between the fixed cover (1) and the expansion cover (4) for connecting them; A positioning piece (5) for fixing the detector is fixedly connected to the interior of the fixed cover (1).

2. The air flow hood adapted to vents of multiple sizes according to claim 1, characterized in that: A first sealing frame (11) is fixedly connected to the outer side of the flared end of the fixed cover (1); The outer side of the closing end of the expansion cover (4) is fixedly connected with a second sealing frame (41) that fits the first sealing frame (11); Both ends of the first sealing frame (11) are fixedly connected with a first fastening member (12), and a first limiting groove (121) is formed through the side surface of the first fastening member (12), and the first limiting groove (121) is U-shaped; Both ends of the second sealing frame (41) are symmetrically fixedly connected with pin-connecting plates (411); The locking member (6) is rotatably connected to the pin-connecting plate (411); The fixing cover (1) and the expansion cover (4) are tightly connected by the mutual engagement between the locking member (6) and the first buckling member (12).

3. The air flow hood adapted to vents of multiple sizes according to claim 2, characterized in that: The locking member (6) includes a threaded column (61) rotatably connected to the pin-connecting plate (411), and a positioning hole (611) is formed through the outer side of one end of the threaded column (61); The threaded column (61) is connected with a butterfly nut (62).

4. The air flow hood adapted to vents of multiple sizes according to claim 2, characterized in that: A third sealing frame (42) is fixedly connected to the outer side of the flared end of the expansion cover (4), and second fastening members (43) are fixedly connected to both ends of the third sealing frame (42). A second limiting groove (431) is formed through the second fastening member (43), and the second limiting groove (431) is U-shaped.

5. The air flow hood adapted to vents of multiple sizes according to claim 1, characterized in that: A horn ring (21) is fixedly connected to the outside of one end of the flow guide tube (2), and a limiting ring (22) is fixedly connected to the inside of the flow guide tube (2), and a through hole (221) is provided through the side of the limiting ring (22).

6. The air flow hood adapted to vents of multiple sizes according to claim 1, characterized in that: The positioning member (5) comprises a column (51) with one end connected to the inner wall of the fixed cover (1); a clamping plate (52) is fixedly connected to the top of the column (51); and a clamping slot (521) is provided through the side of the clamping plate (52).

7. The air flow hood adapted to vents of multiple sizes according to claim 1, characterized in that: The bottom of the fixed cover (1) is fixedly connected to a holding piece (3), and a handle (31) is sleeved on the holding piece (3).

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