A duct measuring point air volume measuring device

Abstract

This utility model discloses an airflow measuring device for a pipeline measuring point, relating to the field of airflow measurement technology. The device includes a pipe body, with a fixed frame fixedly mounted on the top of the pipe body. A display is fixedly mounted on the fixed frame. A screw is rotatably mounted inside the fixed frame, and a movable cylinder is threadedly connected to the screw. A wind speed sensor is fixedly mounted at the end of the movable cylinder. Two rubber sheets are fixedly mounted at the bottom of the fixed frame. By retracting the movable cylinder into the fixed frame, the wind speed sensor can be protected when not measuring wind speed. The rubber sheets can seal the fixed frame, preventing particles from the pipe body from entering and contaminating the wind speed sensor. A rotating shaft drives the sliding plate and the movable cylinder to rotate, thereby moving the wind speed sensor out of the fixed frame for convenient wind speed measurement of the pipe body. Rotating the screw can move the movable cylinder up and down, allowing measurement at different points within the pipe body.

Description

Technical Field

[0001] This utility model relates to the field of air volume measurement technology, specifically to an air volume measurement device for a pipeline measurement point. Background Technology

[0002] The air volume measuring device at the pipeline measuring point is a device used to measure the air volume at a specific location within the pipeline. The air volume measuring device has functions such as measuring wind speed and air volume, and some can measure wind temperature and wind pressure (total pressure, static pressure, differential pressure); it has data display, storage, and transmission functions, and can output the measurement data to the control system or host computer for ventilation system regulation;

[0003] For example, CN219625522U discloses a coal mine ventilation duct air volume measuring device, which includes a pipe body, an arc plate in the middle of the pipe body, a dial fixedly connected to the top of the arc plate, an installation component fixedly connected inside the pipe body, an installation plate fixedly connected to the rear end of the installation component, a wind speed sensor inside the pipe body, and an insertion block fixedly connected to the bottom of the wind speed sensor. The device detects wind speed by placing the wind speed sensor inside the pipe body.

[0004] Air volume measurement involves taking multiple wind speed measurements at various points along the pipeline and averaging them. The air volume is then calculated based on the pipeline cross-section. Wind speed detection generally requires the use of a wind speed sensor. Some existing air volume detection devices, like the aforementioned patent, install the wind speed sensor in the middle of the pipeline. During daily use of the ventilation system, the wind speed sensor is always inside the pipeline. In working environments such as coal mines, thermal power plants, and steel industries, the air inside the pipeline usually contains particulate matter. The wind speed sensor is easily worn down by the rapidly moving particles due to being inside the pipeline for a long time, and the particles can easily accumulate on the sensor surface, affecting the measurement accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide an air volume measuring device for pipeline measuring points to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pipe measuring device for measuring air volume at a pipe measuring point, comprising a pipe body, a fixed frame fixedly installed at the top of the pipe body, a display fixedly installed on the fixed frame, a screw rotatably installed inside the fixed frame, a movable cylinder threadedly connected to the screw, a wind speed sensor fixedly installed at the end of the movable cylinder, and two rubber sheets fixedly installed at the bottom of the fixed frame.

[0007] Preferably, two sliding plates are slidably arranged inside the movable cylinder, and a rotating shaft is fixedly arranged outside each of the two sliding plates. Each rotating shaft is rotatably connected to the inner wall of the fixed frame.

[0008] Preferably, a rotating sleeve is fixedly provided between the two slide plates, and the end of the screw away from the wind speed sensor is rotatably connected to the rotating sleeve.

[0009] Preferably, a rotating rod is rotatably arranged inside the fixed frame, a first bevel gear is fixedly arranged at one end of the rotating rod near the rotating sleeve, and a second bevel gear adapted to the first bevel gear is fixedly arranged at one end of the screw near the first bevel gear.

[0010] Preferably, a handle is rotatably provided at the end of the fixed frame away from the first bevel gear, and the handle is fixedly connected to the rotating rod.

[0011] Preferably, a positioning plate is rotatably provided on the outer circumference of the fixed frame, the positioning plate is fixedly connected to one of the rotating shafts, and a plug rod is slidably provided on the end of the positioning plate away from the rotating shaft. Two plug holes adapted to the plug rod are opened on the side of the fixed frame near the positioning plate.

[0012] Preferably, a baffle is fixedly provided on the insertion rod, and a spring is fixedly provided between the baffle and the positioning plate.

[0013] In the above technical solution, this utility model provides a wind volume measuring device for a pipeline measuring point, which has the following beneficial effects: by retracting the movable cylinder into the fixed frame, the wind speed sensor can be protected when the wind speed is not being measured; the fixed frame can be sealed by the rubber sheet, thereby preventing particles in the pipe from entering the fixed frame and contaminating the wind speed sensor; the rotating shaft drives the sliding plate and the movable cylinder to rotate, thereby moving the wind speed sensor out of the fixed frame, which facilitates the measurement of the wind speed in the pipe; by rotating the screw, the movable cylinder can be moved up and down, thereby enabling the measurement of different points in the pipe. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the rubber sheet provided in an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the movable cylinder provided in an embodiment of the present utility model;

[0018] Figure 4A schematic diagram of the screw structure provided in an embodiment of this utility model;

[0019] Figure 5 Provided for the embodiments of this utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Pipe body; 2. Flange; 3. Display; 4. Fixing frame; 5. Rotating shaft; 6. Throttle; 7. First bevel gear; 8. Screw; 9. Second bevel gear; 10. Rotating sleeve; 11. Moving cylinder; 12. Slide plate; 13. Rotating rod; 131. Positioning plate; 14. Insert rod; 15. Spring; 16. Baffle; 17. Insertion hole; 18. Rubber sheet; 19. Wind speed sensor. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figures 1-5A device for measuring airflow at a pipeline measuring point, comprising a pipe body 1, a fixed frame 4 fixedly mounted on the top of the pipe body 1, a display 3 fixedly mounted on the fixed frame 4, a screw 8 rotatably mounted inside the fixed frame 4, a movable cylinder 11 threadedly connected to the screw 8, a wind speed sensor 19 fixedly mounted at the end of the movable cylinder 11, and two rubber sheets 18 fixedly mounted at the bottom of the fixed frame 4; a groove for placing the movable cylinder 11 and the screw 8 is formed inside the fixed frame 4, the groove penetrating the inner wall of the pipe body 1; the display 3 is fixedly mounted on the top of the fixed frame 4 and electrically connected to the wind speed sensor 19; the display 3 integrates a controller; the wind speed sensor 19 transmits the detection signal to the display 3, which displays and calculates the signal; the end of the screw 8 closest to the display 3 is rotatably mounted inside the fixed frame 4; the two rubber sheets 18 are symmetrically arranged inside the pipe body 1 and seal the groove; initially, the screw 8 and the movable cylinder 11 are both inside the fixed frame 4. Both screw 8 and moving cylinder 11 are parallel to the inner wall of pipe body 1. The groove is sealed by two rubber sheets 18, which can effectively prevent particulate matter in the wind from entering the groove. At the same time, the particulate matter concentration in the lower part of pipe body 1 is greater than that in the upper part. Fixing the fixing frame 4 at the top of pipe body 1 can further prevent particulate matter from entering the groove and contaminating the sensor. When it is necessary to measure the wind speed and air volume in pipe body 1, screw 8 is rotated 90 degrees. Screw 8 drives moving cylinder 11 to rotate 90 degrees. At this time, moving cylinder 11 is perpendicular to the inner wall of pipe body 1. Wind speed sensor 19 is located in pipe body 1. Wind speed sensor 19 is activated through display 3 to detect wind speed. During detection, screw 8 is rotated, which drives moving cylinder 11 to move up and down, thereby adjusting the position of wind speed sensor 19. This allows for wind speed measurement at multiple points in pipe body 1, making it convenient to calculate the air volume by taking the average value. Flanges 2 for connecting with other ventilation pipes are fixed at both ends of pipe body 1.

[0024] Specifically, two sliding plates 12 are slidably installed inside the moving cylinder 11, and a rotating shaft 5 is fixedly installed on the outside of each sliding plate 12. Each rotating shaft 5 is rotatably connected to the inner wall of the fixed frame 4. The inner wall of the moving cylinder 11 is threadedly connected to the screw 8. The two sliding plates 12 are rotatably connected to the inner wall of the fixed frame 4 through the rotating shaft 5. In use, rotating the rotating shaft 5 can drive the moving cylinder 11 to rotate 90 degrees around the axis of the rotating shaft 5 through the sliding plates 12, thereby rotating the wind speed sensor 19 to the middle of the tube body 1. When the moving cylinder 11 is perpendicular to the inner wall of the tube body 1, the screw 8 is rotated around the axis of the moving cylinder 11. Through the two sliding plates 12, the moving cylinder 11 can be prevented from rotating with the screw 8, thereby allowing the moving cylinder 11 to move up and down with the rotation of the screw 8.

[0025] Specifically, a rotating sleeve 10 is fixedly installed between the two sliding plates 12, and the end of the screw 8 away from the wind speed sensor 19 is rotatably connected to the rotating sleeve 10. The rotating sleeve 10 is fixedly installed at the end of the two sliding plates 12 away from the wind speed sensor 19. The two sliding plates 12 and the rotating sleeve 10 drive the screw 8 and the moving cylinder 11 to rotate. The rotating sleeve 10 can limit the screw 8, so that the moving cylinder 11 moves up and down when the screw 8 rotates.

[0026] Specifically, a rotating rod 13 is rotatably mounted inside the fixed frame 4. A first bevel gear 7 is fixedly mounted at one end of the rotating rod 13 near the rotating sleeve 10, and a second bevel gear 9, which is adapted to the first bevel gear 7, is fixedly mounted at the end of the screw 8 near the first bevel gear 7; for example Figure 5 As shown, in the initial state, the first bevel gear 7 and the second bevel gear 9 are not in contact and their axes are parallel. When it is necessary to detect the wind speed and air volume of the pipe body 1, the screw 8 and the moving cylinder 11 are rotated 90 degrees. At this time, the second bevel gear 9 rotates to engage with the first bevel gear 7. Then, the rotating rod 13 is rotated. At this time, the rotating rod 13 drives the second bevel gear 9 to rotate through the first bevel gear 7, which in turn drives the screw 8 to rotate, so that the moving cylinder 11 can drive the wind speed sensor 19 to move up and down, thereby detecting different points in the duct.

[0027] Specifically, a handle 6 is rotatably provided at the end of the fixed frame 4 away from the first bevel gear 7, and the handle 6 is fixedly connected to the rotating rod 13; when the first bevel gear 7 and the second bevel gear 9 abut and mesh, the rotating rod 13 is rotated by the handle 6.

[0028] Specifically, a positioning plate 131 is rotatably mounted on the outer circumference of the fixed frame 4. The positioning plate 131 is fixedly connected to one of the rotating shafts 5. A rod 14 is slidably mounted on the end of the positioning plate 131 away from the rotating shaft 5. Two insertion holes 17 adapted to the rod 14 are opened on the side of the fixed frame 4 near the positioning plate 131. The positioning plate 131 can drive the corresponding rotating shaft 5 to rotate, thereby driving the slide plate 12 to rotate, and thus causing the screw 8 and the moving cylinder 11 to rotate. Figure 1 As shown, in the initial state, the insertion rod 14 is inserted into the bottom insertion hole 17. At this time, the moving cylinder 11 is in the groove of the fixed frame 4. When it is necessary to move the wind speed sensor 19 into the tube body 1, the insertion rod 14 is pulled out from the bottom insertion hole 17, and then the positioning plate 131 is pushed upward to rotate the insertion rod 14 and the positioning plate 131 to the upper insertion hole 17. Then the insertion rod 14 is inserted into the upper insertion hole 17. At this time, the screw 8 and the moving cylinder 11 are both rotated 90 degrees and are perpendicular to the inner wall of the tube body 1. The positioning plate 131 and the moving cylinder 11 are on the same axis.

[0029] Specifically, a baffle 16 is fixedly installed on the insertion rod 14, and a spring 15 is fixedly installed between the baffle 16 and the positioning plate 131. The insertion rod 14 protrudes from the end of the baffle 16 away from the positioning plate 131. When the insertion rod 14 is inserted into the insertion hole 17, the spring 15 can prevent the insertion rod 14 from moving out of the insertion hole 17 at will, thereby ensuring the stability of the moving cylinder 11.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring air volume at a pipeline measuring point, comprising a pipe body (1), characterized in that, A fixed frame (4) is fixedly installed on the top of the tube (1), a display (3) is fixedly installed on the fixed frame (4), a screw (8) is rotatably installed inside the fixed frame (4), a movable cylinder (11) is threadedly connected to the screw (8), a wind speed sensor (19) is fixedly installed at the end of the movable cylinder (11), and two rubber sheets (18) are fixedly installed at the bottom of the fixed frame (4).

2. The air volume measuring device for a pipeline measuring point according to claim 1, characterized in that, Two sliding plates (12) are slidably arranged inside the movable cylinder (11). A rotating shaft (5) is fixedly arranged outside each of the two sliding plates (12). Each rotating shaft (5) is rotatably connected to the inner wall of the fixed frame (4).

3. The air volume measuring device for a pipeline measuring point according to claim 2, characterized in that, A rotating sleeve (10) is fixedly provided between the two slide plates (12), and the end of the screw (8) away from the wind speed sensor (19) is rotatably connected to the rotating sleeve (10).

4. The air volume measuring device for a pipeline measuring point according to claim 3, characterized in that, A rotating rod (13) is rotatably arranged inside the fixed frame (4). A first bevel gear (7) is fixedly arranged at one end of the rotating rod (13) near the rotating sleeve (10). A second bevel gear (9) adapted to the first bevel gear (7) is fixedly arranged at one end of the screw (8) near the first bevel gear (7).

5. The air volume measuring device for a pipeline measuring point according to claim 4, characterized in that, The fixed frame (4) is rotatably provided with a handle (6) at the end away from the first bevel gear (7), and the handle (6) is fixedly connected to the rotating rod (13).

6. The air volume measuring device for a pipeline measuring point according to claim 5, characterized in that, The fixed frame (4) is rotatably provided with a positioning plate (131) on its outer peripheral surface. The positioning plate (131) is fixedly connected to one of the rotating shafts (5). A plug rod (14) is slidably provided at the end of the positioning plate (131) away from the rotating shaft (5). Two plug holes (17) adapted to the plug rod (14) are opened on the side of the fixed frame (4) near the positioning plate (131).

7. The air volume measuring device for a pipeline measuring point according to claim 6, characterized in that, A baffle (16) is fixedly installed on the insert (14), and a spring (15) is fixedly installed between the baffle (16) and the positioning plate (131).

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