A circular horizontal air duct gas flow measuring device

Abstract

The utility model discloses a kind of circular horizontal air duct gas flow measuring devices, it is related to gas flow measurement technical field, comprising: measuring pipe;Turbine;Clamping mechanism, it includes the fixed disc of fixed connection on measuring pipe, multiple chutes are opened in the fixed disc, each chute is slidably connected with slider, one end of each slider is fixedly connected with clamping rod, the other end is fixedly connected with abutment rod, rotating disc is rotatably connected on measuring pipe, rotating disc is opened with multiple abutment slots. By setting clamping mechanism, while rotating rotating disc, each clamping rod can be driven to each other close to the axial position of rotating disc, to realize the self-adapting clamping of arbitrary specification circular air duct;By setting locking mechanism, and locking mechanism and clamping mechanism are mutually matched, so that locking mechanism can realize the self-adapting locking of arbitrary position to rotating disc, to ensure that clamping mechanism cannot be loosened after clamping circular air duct.

Description

Technical Field

[0001] This utility model relates to the field of gas flow measurement technology, specifically a gas flow measurement device for a circular horizontal air duct. Background Technology

[0002] A gas flow measurement device is a device used to measure gas flow rate, primarily for testing and calibrating gas flow meters. A gas flow meter calibration device is used to test the performance indicators of gas flow meters. Its core parameters cover a range from 1 to 7000 cubic meters per hour (m³ / h). 3 The flow rate range is 0.5% (k=2) and the measurement standard is Urel=0.5% (k=2). This device is mainly used to ensure the accuracy and reliability of gas flow meters. There are many types of gas flow meters, including: differential pressure flow meters, through-tube flow meters, vortex flow meters, turbine flow meters, ultrasonic flow meters, electromagnetic flow meters, and thermal flow meters.

[0003] For example, publication number CN222617964U, publication date March 14, 2025, titled "A Turbine Flow Meter," includes a flow meter body. A display is installed at the center of the top of the flow meter body. The front of the display has a display mounting slot, and a transparent baffle is inserted inside the display mounting slot. Both ends of the transparent baffle are provided with snap-fit ​​mechanisms, and the top and bottom of the display mounting slot are provided with snap-fit ​​holes. In use, the snap-fit ​​mechanisms and snap-fit ​​holes facilitate the use of the transparent baffle to shield and protect the display body by snapping it into the display mounting slot. The transparency of the transparent baffle allows people to observe the information on the display body through it. Dust can also be wiped off the transparent baffle before observing the information on the display body. When it is inconvenient to wipe the transparent baffle, it can be removed through the snap-fit ​​mechanism to directly observe the information on the display body, thus improving the protection and applicability of the display screen on the turbine flow meter.

[0004] In existing technologies such as those containing the aforementioned patents, when measuring the gas flow rate of a circular air duct, it is usually necessary to place the measuring device at the outlet of the circular air duct for measurement; however, the shortcomings of the existing technology are that the specifications of the measuring device are usually fixed and cannot be adapted to circular air ducts of various sizes, thus requiring the use of different measuring devices for measurement. Utility Model Content

[0005] The purpose of this invention is to provide a gas flow measurement device for a circular horizontal duct to address the shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a circular horizontal duct gas flow measurement device, comprising:

[0007] Measuring tube;

[0008] The turbine, whose rotation is connected inside the measuring tube;

[0009] The clamping mechanism includes a fixed plate fixedly connected to the measuring tube. The fixed plate has multiple sliding grooves, and a slider is slidably connected in each groove. A clamping rod is fixedly connected to one end of each slider, and an abutment rod is fixedly connected to the other end. A rotating disk is rotatably connected to the measuring tube. The rotating disk has multiple abutment grooves, and each abutment rod is slidably connected in each abutment groove.

[0010] Furthermore, it also includes a locking mechanism, which includes a ratchet fixedly connected to the measuring tube, a pawl rotatably connected to the rotating disk, the pawl engaging with the ratchet, and an elastic element provided between the pawl and the rotating disk.

[0011] Furthermore, a filter screen is fixedly connected inside the measuring tube.

[0012] Furthermore, a measuring instrument is fixedly connected to the measuring tube.

[0013] Furthermore, the abutment groove is set at an angle.

[0014] Furthermore, the elastic element is a torsion spring.

[0015] Compared with the prior art, the circular horizontal air duct gas flow measuring device provided by this utility model has the following advantages: by setting up a clamping mechanism, while rotating the rotating disk, it can drive each clamping rod to move closer to the axis of the rotating disk, thereby realizing adaptive clamping of circular air ducts of any size; by setting up a locking mechanism, and the locking mechanism cooperating with the clamping mechanism, the locking mechanism can achieve adaptive locking of the rotating disk at any position, thereby ensuring that the clamping mechanism cannot be released after the circular air duct is clamped. Attached Figure Description

[0016] 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.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the measuring tube provided in an embodiment of the present utility model;

[0019] Figure 3This is a schematic diagram of the overall structure from another angle, representing an embodiment of the present utility model.

[0020] Figure 4 This is a schematic diagram of the clamping mechanism provided in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the overall structure from a side view angle provided for an embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Measuring tube; 2. Turbine; 3. Filter screen; 4. Measuring gauge; 5. Clamping mechanism; 51. Fixed plate; 511. Slide groove; 52. Rotating plate; 521. Abutment groove; 53. Abutment rod; 54. Slider; 55. Clamping rod; 6. Locking mechanism; 61. Ratchet; 62. Pad. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5 This utility model provides a circular horizontal duct gas flow measurement device, comprising: a measuring tube 1; a turbine 2 rotatably connected inside the measuring tube 1; and a measuring gauge 4 fixedly connected to the measuring tube 1. The turbine flow meter is existing technology. The turbine 2 is electrically connected to the measuring gauge 4. Gas drives the blades of the turbine 2 to rotate. The rotational speed of the turbine 2 is proportional to the gas flow rate. A magnetic or optical sensor detects the rotational speed of the turbine 2, converts it into a flow rate reading, and transmits the reading to the measuring gauge 4.

[0025] Preferably, a filter screen 3 is fixedly connected inside the measuring tube 1; the filter screen 3 can filter impurities in the gas during the gas flow measurement process to prevent impurities from damaging or corroding the turbine 2.

[0026] In another embodiment, the filter screen 3 is detachably disposed inside the measuring tube 1, which facilitates the replacement of the filter screen 3.

[0027] The clamping mechanism 5 is used to adaptively clamp circular ducts of various sizes, thereby connecting the measuring tube 1 to the circular duct. It includes a fixed plate 51 fixedly connected to the measuring tube 1. The fixed plate 51 has multiple sliding grooves 511. Each sliding groove 511 has a slider 54 slidably connected in it. One end of each slider 54 is fixedly connected to a clamping rod 55, and the other end is fixedly connected to an abutment rod 53. A rotating plate 52 is rotatably connected to the measuring tube 1. The rotating plate 52 has multiple abutment grooves 521. Specifically, the abutment grooves 521 are inclined. Each abutment rod 53 is slidably connected in each abutment groove 521.

[0028] In use, by rotating the rotating disk 52, the abutment groove 521 and the abutment rod 53 cooperate to drive the abutment rod 53 to move towards the axis of the rotating disk 52 and move closer to each other. This causes the abutment rod 53 to drive each slider 54 to slide in the slide groove 511, thereby bringing the clamping rods 55 closer together. This enables the clamping and fixing of circular air ducts of various sizes and specifications, so as to facilitate the subsequent gas flow measurement work.

[0029] Preferably, an elastic sealing gasket is provided between the fixed plate 51 and the circular air duct, which can ensure the airtightness between the fixed plate 51 and the circular air duct.

[0030] Preferably, it also includes a locking mechanism 6, which includes a ratchet 61 fixedly connected to the measuring tube 1, a pawl 62 rotatably connected to the rotating disk 52, the pawl 62 engaging with the ratchet 61, and an elastic element provided between the pawl 62 and the rotating disk 52; specifically, the elastic element is a torsion spring.

[0031] Understandably, the unidirectional transmission between the pawl 62 and the ratchet 61 enables the rotating disk 52 to be adaptively locked at any position; it is precisely through the unidirectional interaction between the pawl 62 and the ratchet 61 that the clamping mechanism 5 cannot be released after the clamping action is completed.

[0032] Preferably, a lever is fixedly connected to the pawl 62, which can easily drive the pawl 62 to rotate on the rotating disk 52, thereby disengaging the pawl 62 from the ratchet 61 so that the rotating disk 52 can rotate and reset.

[0033] To unlock, move the lever on the pawl 62 to disengage the pawl 62 from the ratchet 61, and then rotate the rotating disk 52 to reset it.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circular horizontal duct gas flow measuring device, characterized by, Comprising: A measuring pipe (1); A turbine (2) is rotatably connected in the measuring pipe (1); The clamping mechanism (5) comprises a fixed disc (51) fixedly connected on the measuring pipe (1), a plurality of sliding grooves (511) are formed in the fixed disc (51), a sliding block (54) is slidably connected in each sliding groove (511), one end of each sliding block (54) is fixedly connected with a clamping rod (55), the other end is fixedly connected with an abutting rod (53), a rotating disc (52) is rotatably connected on the measuring pipe (1), a plurality of abutting grooves (521) are formed in the rotating disc (52), each abutting rod (53) is slidably connected in each abutting groove (521) one by one.

2. A circular horizontal duct gas flow measuring device according to claim 1, wherein, Further comprising a locking mechanism (6), the locking mechanism (6) comprises a ratchet wheel (61) fixedly connected on the measuring pipe (1), a pawl (62) is rotatably connected on the rotating disc (52), the pawl (62) is in clamped connection with the ratchet wheel (61), and an elastic member is arranged between the pawl (62) and the rotating disc (52).

3. A circular horizontal duct gas flow measuring device according to claim 1, wherein, The filter screen (3) is fixedly connected in the measuring pipe (1).

4. A circular horizontal duct gas flow measuring device according to claim 1, wherein, The measuring table (4) is fixedly connected on the measuring pipe (1).

5. A circular horizontal duct gas flow measuring device according to claim 1, wherein, The abutting groove (521) is inclined.

6. A circular horizontal duct gas flow measuring device according to claim 2, wherein, The elastic member is a torsion spring.

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