Air volume measuring device for ventilating duct

Abstract

The utility model discloses a ventilation pipeline air volume measuring device which comprises a plurality of adsorption pieces used for being connected with the inner surface of a ventilation pipeline, a front-and-back moving assembly, a left-and-right moving assembly, an up-and-down moving assembly and a detection assembly. One of the front-and-back moving assembly and the left-and-right moving assembly is connected with the adsorption part and the fixed end of the up-and-down moving assembly to drive the up-and-down moving assembly to move, and the other one of the front-and-back moving assembly and the left-and-right moving assembly is connected with the moving end of the up-and-down moving assembly and the detection assembly to drive the detection assembly to move; the detection assembly comprises a supporting seat, an electric rotating support and an air volume detector, the supporting seat is connected with the other one of the front-back moving assembly and the left-right moving assembly, the electric rotating support is installed on the supporting seat, and the air volume detector is connected with the electric rotating support and rotates along with the electric rotating support. The whole device can be fixed in the ventilation pipeline, the position and the angle of the air volume detector can be adjusted, and the measurement precision is ensured.

Description

Technical Field

[0001] This utility model relates to the field of ventilation system maintenance, and in particular to a ventilation duct airflow measuring device. Background Technology

[0002] To ensure adequate cooling, dehumidification, and insulation for equipment during daily operation and major overhauls of nuclear power plants, and to guarantee a comfortable working environment for staff and maintenance personnel, numerous ventilation systems are distributed throughout the plant buildings. Airflow is a crucial metric for evaluating the proper functioning of these systems. Currently, power plants use two types of airflow measurement tools: one is fixedly installed inside the ductwork, transmitting data via an instrument; the other is manual measurement. Manual anemometers are portable measuring tools used when fixed instruments malfunction or fail, or to troubleshoot anomalies and verify the airflow of each ventilation system.

[0003] The power plant's current manual measurement method involves using an extension rod with an extension function. The anemometer is fixed to one side of the extension rod, and the rod is used to insert the anemometer into the duct, holding it still for a period of time to measure the airflow. This method is limited by the manual holding of the extension rod, which cannot be completely fixed. Movement of the person or the extension rod can lead to inaccurate anemometer readings. Furthermore, for ducts with different angles, such as bends, the manual measurement device cannot reach an effective measurement position. Handheld measurements are also susceptible to data deviation due to the person obstructing the air outlet. These various deviations necessitate multiple measurements and averaging, resulting in significant errors and high labor costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a ventilation duct air volume measuring device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a ventilation duct air volume measuring device, including an adsorption component for connecting to the inner surface of the ventilation duct, a front-back moving component, a left-right moving component, an up-down moving component, and a detection component. One of the front-back moving component and the left-right moving component is respectively connected to the fixed end of the adsorption component and the up-down moving component to drive the up-down moving component to move. The other of the front-back moving component and the left-right moving component is respectively connected to the moving end of the up-down moving component and the detection component to drive the detection component to move.

[0006] The detection component includes a support base, an electric rotating bracket, and an air volume detector. The support base is connected to the other of the front-to-back moving component and the left-to-right moving component. The electric rotating bracket is mounted on the support base, and the air volume detector is connected to the electric rotating bracket and rotates with the electric rotating bracket.

[0007] In some embodiments, the airflow detector further includes a detector housing and an airflow detector, the airflow detector being installed inside the detector housing, and the detector housing being connected to the electric rotating bracket.

[0008] In some embodiments, the forward and backward moving assembly includes a forward and backward moving slide rail, a forward and backward moving screw, a forward and backward driving motor, and a forward and backward moving slider. The first end of the forward and backward moving screw is rotatably connected to the forward and backward moving slide rail, the second end of the forward and backward moving screw is connected to the motor shaft of the forward and backward driving motor, and the forward and backward moving slider is screwed to the forward and backward moving screw.

[0009] The fixed end of the up-down moving component is connected to the front-back moving slider, or the moving end of the up-down moving component is connected to the front-back moving slide rail.

[0010] In some embodiments, the left and right moving component includes a left and right moving slide rail, a left and right moving screw, a left and right driving motor, and a left and right moving slider. The first end of the left and right moving screw is rotatably connected to the left and right moving slide rail, the second end of the left and right moving screw is connected to the motor shaft of the left and right driving motor, and the left and right moving slider is screwed to the left and right moving screw.

[0011] The fixed end of the up-down moving component is connected to the left-right moving slider, or the moving end of the up-down moving component is connected to the left-right moving slide rail.

[0012] In some embodiments, the up-and-down moving assembly includes an up-and-down moving slide rail, an up-and-down moving screw, an up-and-down driving motor, and an up-and-down moving slider. The first end of the up-and-down moving screw is rotatably connected to the up-and-down moving slide rail, the second end of the up-and-down moving screw is connected to the motor shaft of the up-and-down driving motor, and the up-and-down moving slider is screwed to the up-and-down moving screw.

[0013] Wherein, the vertical moving slide rail is connected to the horizontal moving slider, and the vertical moving slider is connected to the horizontal moving slide rail; or the vertical moving slide rail is connected to the horizontal moving slider, and the vertical moving slider is connected to the horizontal moving slide rail.

[0014] In some embodiments, a fixing plate is also included, which is connected to the left-right sliding rail or the up-down sliding rail;

[0015] The adsorption element includes at least three, which form a mechanical triangular structure, with at least one installed at the bottom of the fixed plate and at least two installed at the bottom of the left-right moving slide rail or the front-back moving slide rail.

[0016] In some embodiments, the adsorption element includes a suction cup and / or a magnetic element.

[0017] In some embodiments, a storage battery is also included, which is electrically connected to the front-to-back moving component, the left-to-right moving component, the up-to-down moving component, the electric rotating bracket, and the air volume detector.

[0018] In some embodiments, the vertical sliding rail and the front-back sliding slider are an integral structure, and / or the vertical sliding slider and the left-right sliding rail are an integral structure.

[0019] In some embodiments, the vertical sliding rail and the horizontal sliding slider are an integral structure, and / or the vertical sliding slider and the front-back sliding rail are an integral structure.

[0020] By implementing this utility model, the following beneficial effects can be achieved:

[0021] This utility model discloses a ventilation duct airflow measuring device, comprising several adsorption components, a front-to-back moving assembly, a left-to-right moving assembly, a vertical moving assembly, and a detection assembly for connecting the ventilation duct. One of the front-to-back moving assembly and the left-to-right moving assembly is connected to the fixed end of the adsorption component and the vertical moving assembly, respectively, to drive the vertical moving assembly to move. The other of the front-to-back moving assembly and the left-to-right moving assembly is connected to the moving end of the vertical moving assembly and the detection assembly, respectively, to drive the detection assembly to move. The detection assembly includes a support base, an electric rotating bracket, and an airflow detector. The support base is connected to the other of the front-to-back moving assembly and the left-to-right moving assembly. The electric rotating bracket is mounted on the support base, and the airflow detector is connected to the electric rotating bracket and rotates with it. By adsorbing the entire device onto the inner surface of the ventilation duct using the adsorption components, quick fixing and disassembly are achieved, reducing assembly and disassembly procedures, making it convenient to use, saving operating time and labor costs, and improving detection efficiency. The forward and backward movement component enables the air volume detector to move forward and backward, the left and right movement component enables the air volume detector to move left and right, the up and down movement component enables the air volume detector to move up and down, and the electric rotating bracket enables the air volume detector to be adjusted in angle. This allows for the adjustment of the position and angle of the air volume detector, which can be adapted to the appropriate measurement position and angle of different ventilation ducts, ensuring the accuracy of air volume measurement in ventilation ducts. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a ventilation duct air volume measuring device according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A structural diagram of the vertical and horizontal moving components;

[0025] Figure 3 yes Figure 1 A schematic diagram of the measurement component in the diagram. Detailed Implementation

[0026] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] For ease of description, the orientation of this utility model is based on... Figure 1As shown, the axial direction of the air volume detector 53 towards the reader is defined as front, and the opposite direction is defined as back, and so on for left, right, up, and down directions.

[0031] See Figures 1 to 3 One embodiment of this utility model discloses a ventilation duct airflow measuring device, including an adsorption component 1 for connecting to the inner surface of the ventilation duct, a front-back moving component 2, a left-right moving component 3, a vertical moving component 4, and a detection component 5. One of the front-back moving component 2 and the left-right moving component 3 is connected to the fixed ends of the adsorption component 1 and the vertical moving component 4, respectively, to drive the vertical moving component 4 to move. The other of the front-back moving component 2 and the left-right moving component 3 is connected to the moving end of the vertical moving component 4 and the detection component 5, respectively, to drive the detection component 5 to move. The front-back moving component 2 is used to ultimately drive the front-back movement of the detection component 5, the left-right moving component 3 can be used to ultimately drive the left-right movement of the detection component 5, and the vertical moving component 4 is used to ultimately drive the vertical movement of the detection component 5. The front-back moving component 2, the left-right moving component 3, and the vertical moving component 4 can be arbitrarily combined and connected to achieve adjustment of the detection component 5 in the corresponding directions. For example, the front-back moving component 2 is connected to the fixed ends of the adsorption component 1 and the vertical moving component 4, while the left-right moving component 3 is connected to the moving end of the vertical moving component 4 and the detection component 5, respectively. Alternatively, the left and right moving component 3 can be connected to the fixed ends of the adsorption component 1 and the up and down moving component 4 respectively, while the front and back moving component 2 can be connected to the moving end of the up and down moving component 4 and the detection component 5 respectively.

[0032] like Figure 3 As shown, the detection component 5 includes a support base 51, an electric rotating bracket 52, and an airflow detector 53. The support base 51 is connected to the other of the front-to-back moving component 2 and the left-to-right moving component 3. The electric rotating bracket 52 is mounted on the support base 51, and the airflow detector 53 is connected to the electric rotating bracket 52 and rotates with it. The electric rotating bracket 52 can rotate 180°, 270°, or 360°, simultaneously rotating the airflow detector 53 to adjust its measurement angle. The electric rotating bracket 52 is existing technology and will not be described in detail here. The support base 51 is connected to the other of the front-to-back moving component 2 and the left-to-right moving component 3. For example, the front-to-back moving component 2 is connected to the fixed end of the vertical moving component 4, while the support base 51 is connected to the left-to-right moving component 3. Alternatively, the left-to-right moving component 3 is connected to the fixed end of the vertical moving component 4, while the support base 51 is connected to the front-to-back moving component 2.

[0033] Specifically, in this embodiment, the adsorption element 1 is installed at the bottom of the front-to-back moving assembly 2. The front-to-back moving assembly 2 is connected to the fixed end of the up-and-down moving assembly 4, which can drive the up-and-down moving assembly 4 to move back and forth. The moving end of the up-and-down moving assembly 4 is connected to the left-and-right moving assembly 3, which can drive the left-and-right moving assembly 3 to move up and down. The support base 51 is connected to the left-and-right moving assembly 3, which can drive the support base 51 to move left and right. The electric rotating bracket 52 is connected to the support base 51 and the airflow detector 53, respectively, and ultimately drives the airflow detector 53 to rotate. In use, one, two, or more of the front-to-back moving assembly 2, the left-and-right moving assembly 3, the up-and-down moving assembly 4, and the electric rotating bracket 52 can be adjusted according to actual needs. The ultimate goal is to adjust the position and angle of the airflow detector 53 inside the ventilation duct to improve measurement accuracy.

[0034] This utility model discloses a ventilation duct airflow measuring device. The entire device is fixed in place by an adsorption component 1, eliminating the need for manual hand-holding and ensuring stability during measurement. It also prevents the user from obstructing the air outlet, resulting in excellent measurement accuracy. Furthermore, the device is adjustable in four directions: front-back, left-right, up-down, and circumferential, allowing for position adjustment as needed. When encountering bends in the ventilation duct, the airflow meter 53 can be rotated to measure airflow at different angles and directions, ensuring measurement accuracy. Moreover, the device eliminates the need for the operator to hold it stationary, reducing workload and labor intensity.

[0035] like Figure 3 As shown, in some embodiments, the airflow detector 53 further includes a detector cylinder 531 and an airflow detector 532. The airflow detector 532 is installed inside the detector cylinder 531, which is connected to the electrically rotating support 52. The detector cylinder 531 guides the airflow and can be designed as a straight tube to allow the airflow to pass smoothly through the detection area, reducing turbulence interference and improving measurement accuracy. The airflow detector 532 detects the airflow velocity and calculates the real-time airflow based on the cross-sectional area data; this is existing technology and will not be described in detail here.

[0036] like Figure 1 As shown, in some embodiments, the forward and backward moving assembly 2 includes a forward and backward moving slide rail 21, a forward and backward moving screw 22, a forward and backward driving motor 23, and a forward and backward moving slider 24. The first end of the forward and backward moving screw 22 is rotatably connected to the forward and backward moving slide rail 21, and the second end of the forward and backward moving screw 22 is connected to the motor shaft of the forward and backward driving motor 23. The forward and backward moving slider 24 is screwed to the forward and backward moving screw 22. Alternatively, the fixed end of the up and down moving assembly 4 is connected to the forward and backward moving slider 24, or the moving end of the up and down moving assembly 4 is connected to the forward and backward moving slide rail 21. Specifically, in this embodiment, the fixed end of the up and down moving assembly 4 is connected to the forward and backward moving slider 24.

[0037] like Figure 2 As shown, in some embodiments, the left-right moving component 3 includes a left-right moving slide rail 31, a left-right moving screw 32, a left-right driving motor 33, and a left-right moving slider 34. The first end of the left-right moving screw 32 is rotatably connected to the left-right moving slide rail 31, and the second end of the left-right moving screw 32 is connected to the motor shaft of the left-right driving motor 33. The left-right moving slider 34 is screwed to the left-right moving screw 32. The fixed end of the up-down moving component 4 is connected to the left-right moving slider 34, or the moving end of the up-down moving component 4 is connected to the left-right moving slide rail 31.

[0038] like Figure 2 As shown, in some embodiments, the up-and-down moving assembly 4 includes an up-and-down moving slide rail 41, an up-and-down moving screw 42, an up-and-down driving motor 43, and an up-and-down moving slider 44. The first end of the up-and-down moving screw 42 is rotatably connected to the up-and-down moving slide rail 41, and the second end of the up-and-down moving screw 42 is connected to the motor shaft of the up-and-down driving motor 43. The up-and-down moving slider 44 is screwed to the up-and-down moving screw 42. The up-and-down moving slide rail 41 is connected to the front-and-back moving slider 24, and the up-and-down moving slider 44 is connected to the left-and-right moving slide rail 31. Alternatively, the up-and-down moving slide rail 41 is connected to the left-and-right moving slider 34, and the up-and-down moving slider 44 is connected to the front-and-back moving slide rail 21. Figure 1 As shown, in this embodiment, the vertical sliding rail 41 is connected to the front-back sliding slider 24, and the vertical sliding slider 44 is connected to the left-right sliding rail 31. The fixed end of the vertical moving component 4 refers to the vertical sliding rail 41, and the moving end of the vertical moving component 4 refers to the vertical sliding slider 44.

[0039] In some embodiments, the vertical sliding rail 41 and the horizontal sliding slider 24 are integrally formed, and / or, the vertical sliding slider 44 and the horizontal sliding rail 31 are integrally formed. For example, the vertical sliding rail 41 and the horizontal sliding slider 24 are integrally formed. Or the vertical sliding slider 44 and the horizontal sliding rail 31 are integrally formed. Or, as... Figure 2 As shown, in this embodiment, the vertical sliding rail 41 and the front-to-back sliding slider 24 are integrally formed, and the vertical sliding slider 44 and the left-to-right sliding rail 31 are also integrally formed. The bottom end of the vertical sliding rail 41 has a threaded hole that matches the thread of the front-to-back sliding screw 22. The right end of the left-to-right sliding rail 31 has a threaded hole that matches the thread of the vertical sliding screw 42.

[0040] Understandably, in some other embodiments, the vertical sliding rail 41 and the horizontal sliding slider 34 are integrally formed, and / or, the vertical sliding slider 44 and the front-back sliding rail 21 are integrally formed. For example, the vertical sliding rail 41 and the horizontal sliding slider 34 are integrally formed. Or the vertical sliding slider 44 and the front-back sliding rail 21 are integrally formed. Or, the vertical sliding rail 41 and the horizontal sliding slider 34 are integrally formed, and simultaneously, the vertical sliding slider 44 and the front-back sliding rail 21 are integrally formed. These examples are not shown in the figures.

[0041] like Figure 1 As shown, in some embodiments, a fixing plate 6 is also included, which is connected to the left-right moving slide rail 31 or the up-down moving slide rail 41. The suction member 1 includes at least three members, which form a mechanical triangular structure, with at least one member installed at the bottom of the fixing plate 6 and at least two members installed at the bottom of the left-right moving slide rail 31 or the front-back moving slide rail 21. For example, as... Figure 1 As shown, at least two are installed on the bottom of the front and rear moving slide rails 21. Specifically, at least one is installed on the bottom front end of the front and rear moving slide rails 21, and at least one is installed on the bottom rear end of the left and right moving slide rails 31. Alternatively, at least two are installed on the bottom of the left and right moving slide rails 31 (not shown in the figure). Specifically, at least one is installed on the bottom right end of the left and right moving slide rails 31, and at least one is installed on the bottom left end of the left and right moving slide rails 31. The fixing plate 6 is used to provide the mounting base for the suction element 1.

[0042] like Figure 1 As shown, in some embodiments, the adsorption component 1 includes a suction cup 11 and / or a magnetic component. The adsorption component 1 is used to adhere to the inner surface of the ventilation duct, so that the entire device can be fixed inside the duct. The adsorption component 1 includes a suction cup 11 and / or a magnetic component. For example, the adsorption component 1 includes a suction cup 11, which can adhere to the inner surface of a relatively smooth ventilation duct. The suction cup 11 can be connected and fixed to the left and right sliding rails 31 or the fixing plate 6 via the support column 7. The suction cup 11 and the support column 7 can be detachably connected for easy replacement of the suction cup 11. Alternatively, the adsorption component 1 includes a magnetic component, which can adhere to the inner surface of a ventilation duct made of metal material. Alternatively, the adsorption component 1 includes a suction cup 11 and a magnetic component, with the suction cup 11 and the magnetic component spaced apart, which can achieve reinforced fixation to the inner surface of a ventilation duct made of metal material. Understandably, in some other embodiments, a silicone sealing ring or corrugated structure can be added to the suction cup 11 to adapt to irregular surfaces. Alternatively, metal patches can be pre-embedded on the surface of plastic pipes, ceramic pipes, etc., to facilitate the adsorption and positioning of the magnetic component.

[0043] The ventilation duct air volume measuring device of this utility model is fixed as a whole by the adsorption component 1, which eliminates the need for manual hand-holding, thus maintaining stability during measurement and eliminating concerns about human body blocking the air outlet, resulting in better measurement results.

[0044] In some embodiments, the system further includes a battery 8, which is electrically connected to the front-to-back moving assembly 2, the left-to-right moving assembly 3, the up-to-down moving assembly 4, the electric rotating bracket 52, and the airflow detector 53. Specifically, the battery 8 is electrically connected to the front-to-back drive motor 23, the left-to-right drive motor 33, and the up-to-down drive motor 43.

[0045] By implementing this utility model, the following beneficial effects can be achieved:

[0046] This utility model discloses a ventilation duct airflow measuring device. The device is attached to the inner surface of the ventilation duct by an adsorption component 1, allowing for quick fixing and disassembly, reducing assembly and disassembly procedures, facilitating use, saving operation time and labor costs, and improving testing efficiency. The forward and backward movement component 2 enables the airflow detector 53 to move forward and backward, the left and right movement component 3 enables the left and right movement of the airflow detector 53, and the up and down movement component 4 enables the up and down movement of the airflow detector 53. The electric rotating bracket 52 allows for angle adjustment of the airflow detector 53, enabling adjustments to its position and angle. This allows for suitable measurement positions and angles for different ventilation ducts, ensuring the accuracy of airflow measurement in the ventilation duct.

[0047] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A ventilation duct airflow measuring device, characterized in that, It includes several adsorption components (1) for connecting the inner surface of the ventilation duct, a front-back moving component (2), a left-right moving component (3), an up-down moving component (4), and a detection component (5). One of the front-back moving component (2) and the left-right moving component (3) is connected to the fixed ends of the adsorption components (1) and the up-down moving component (4) respectively, so as to drive the up-down moving component (4) to move. The other of the front-back moving component (2) and the left-right moving component (3) is connected to the moving end of the up-down moving component (4) and the detection component (5) respectively, so as to drive the detection component (5) to move. The detection component (5) includes a support base (51), an electric rotating bracket (52), and an air volume detector (53). The support base (51) is connected to one of the front-to-back moving component (2) and the left-to-right moving component (3). The electric rotating bracket (52) is mounted on the support base (51). The air volume detector (53) is connected to the electric rotating bracket (52) and rotates with the electric rotating bracket (52).

2. The ventilation duct airflow measuring device according to claim 1, characterized in that, The air volume detector (53) also includes a detector cylinder (531) and an air volume detector (532). The air volume detector (532) is installed inside the detector cylinder (531), and the detector cylinder (531) is connected to the electric rotating bracket (52).

3. The ventilation duct airflow measuring device according to claim 1, characterized in that, The forward and backward moving assembly (2) includes a forward and backward moving slide rail (21), a forward and backward moving screw (22), a forward and backward driving motor (23), and a forward and backward moving slider (24). The first end of the forward and backward moving screw (22) is rotatably connected to the forward and backward moving slide rail (21), the second end of the forward and backward moving screw (22) is connected to the motor shaft of the forward and backward driving motor (23), and the forward and backward moving slider (24) is screwed to the forward and backward moving screw (22). The fixed end of the up-down moving component (4) is connected to the front-back moving slider (24), or the moving end of the up-down moving component (4) is connected to the front-back moving slide rail (21).

4. The ventilation duct airflow measuring device according to claim 3, characterized in that, The left and right moving component (3) includes a left and right moving slide rail (31), a left and right moving screw (32), a left and right driving motor (33), and a left and right moving slider (34). The first end of the left and right moving screw (32) is rotatably connected to the left and right moving slide rail (31), the second end of the left and right moving screw (32) is connected to the motor shaft of the left and right driving motor (33), and the left and right moving slider (34) is screwed to the left and right moving screw (32). The fixed end of the up-down moving component (4) is connected to the left-right moving slider (34), or the moving end of the up-down moving component (4) is connected to the left-right moving slide rail (31).

5. The ventilation duct airflow measuring device according to claim 4, characterized in that, The up-and-down moving assembly (4) includes an up-and-down moving slide rail (41), an up-and-down moving screw (42), an up-and-down driving motor (43), and an up-and-down moving slider (44). The first end of the up-and-down moving screw (42) is rotatably connected to the up-and-down moving slide rail (41), the second end of the up-and-down moving screw (42) is connected to the motor shaft of the up-and-down driving motor (43), and the up-and-down moving slider (44) is screwed to the up-and-down moving screw (42). The vertical sliding rail (41) is connected to the horizontal sliding block (24), and the vertical sliding block (44) is connected to the horizontal sliding rail (31); or the vertical sliding rail (41) is connected to the horizontal sliding block (34), and the vertical sliding block (44) is connected to the horizontal sliding rail (21).

6. The ventilation duct airflow measuring device according to claim 5, characterized in that, It also includes a fixing plate (6), which is connected to the left and right moving slide rail (31) or the up and down moving slide rail (41); The adsorption element (1) includes at least three, the three adsorption elements (1) form a mechanical triangular structure, and at least one is installed on the bottom of the fixed plate (6), and at least two are installed on the bottom of the left and right moving slide rail (31) or the front and back moving slide rail (21).

7. The ventilation duct airflow measuring device according to any one of claims 1-5, characterized in that, The adsorption element (1) includes a suction cup (11) and / or a magnetic element.

8. The ventilation duct airflow measuring device according to any one of claims 1-5, characterized in that, It also includes a storage battery (8), which is electrically connected to the front and rear moving component (2), the left and right moving component (3), the up and down moving component (4), the electric rotating bracket (52) and the air volume detector (53).

9. The ventilation duct airflow measuring device according to claim 5, characterized in that, The vertical sliding rail (41) and the front-back sliding block (24) are an integral structure, and / or the vertical sliding block (44) and the left-right sliding rail (31) are an integral structure.

10. The ventilation duct airflow measuring device according to claim 5, characterized in that, The vertical sliding rail (41) and the horizontal sliding slider (34) are an integral structure, and / or the vertical sliding slider (44) and the front-back sliding rail (21) are an integral structure.

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