Device for detecting airflow pressure

Abstract

The utility model relates to the technical field of airflow detection, and discloses a device for detecting airflow pressure, which comprises a fan body, the outer wall of the fan body is provided with a metal air duct, the outer wall of the metal air duct is fixedly connected with a support, the outer wall of the support is provided with a manometer, the outer wall of the metal air duct is provided with an annular pressure measuring pipe body, and the annular pressure measuring pipe body is fixedly connected with the metal air duct. A first piezometer tube is arranged on the outer wall of the annular piezometer tube body, a hose is arranged at one end of the first piezometer tube, one end of the hose is fixedly connected to the outer wall of the manometer, and the other end of the hose is fixedly connected to the outer wall of the first piezometer tube. According to the utility model, the annular pressure measuring pipe is arranged on the outer wall of the metal air duct, so that the average pressure value of the cross section can be detected, the detection is more stable and more accurate, and the effect of the device can be more effectively played by measuring the pressure values of two different cross sections and calculating flow information.

Description

Technical Field

[0001] The utility model relates to the technical field of airflow detection, in particular to a device for detecting airflow pressure. Background Art

[0002] A common pressure-measuring device used in mine main ventilation ducts is a water column U-shaped manometer with openings at both ends. Its operating principle is that before the U-shaped manometer is connected to a pressure measuring point, the liquid levels on both sides of the U-shaped glass tube are level at the zero scale line. When one end of the U-shaped tube is connected to the pressure measuring point and the other end is exposed to the atmosphere, the liquid level inside the U-shaped tube changes. If the liquid level on the side connected to the pressure measuring point drops, the pressure at that point is positive; if it drops, it is negative. The pressure value is then read according to the scale line.

[0003] When using a U-shaped pressure gauge to measure pressure, a point is selected on the outer wall of the air duct to set a pressure measuring tube. The pressure measuring tube needs to connect the inside of the air duct to the outside. The air duct is composed of an underground air duct, a cement air duct and a fan body. The inner surfaces of the underground air duct and the cement air duct are not smooth planes and are not suitable for installing pressure measuring tubes. The flow channel structure of the fan body is complex and the airflow is unstable. If the pressure value of a single point is measured, the pressure value of the cross section cannot be accurately reflected. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a device for detecting airflow pressure, aiming to improve the problem of not being able to accurately detect the pressure value of a certain point cross section.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for detecting airflow pressure, comprising a fan body, the outer wall of the fan body is provided with a metal wind tube, the outer wall of the metal wind tube is fixedly connected to a bracket, the outer wall of the bracket is provided with a pressure gauge, the outer wall of the metal wind tube is provided with an annular pressure measuring tube body, the outer wall of the annular pressure measuring tube body is provided with a first pressure measuring tube, one end of the first pressure measuring tube is provided with a hose, one end of the hose is fixedly connected to the outer wall of the pressure gauge, and the other end of the hose is fixedly connected to the outer wall of the first pressure measuring tube.

[0006] Preferably, a plurality of second pressure measuring tubes are provided on the outer wall of the metal wind tube.

[0007] Preferably, one end of the second pressure measuring tube is connected to the inner surface of the metal wind tube.

[0008] Preferably, the other end of the second pressure measuring tube is connected to the outside atmosphere.

[0009] Preferably, the outer wall of the annular pressure measuring tube body is connected to one end of a plurality of second pressure measuring tubes connected to the atmosphere.

[0010] The utility model has the following beneficial effects:

[0011] 1. In the present invention, an annular pressure measuring tube is provided on the outer wall of the metal duct, so that the average pressure value of the cross section can be detected, which is more stable and accurate during detection. In addition, the flow information can be calculated by measuring the pressure values of two different cross sections, thereby more effectively playing the role of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a plan view of a device for detecting airflow pressure proposed by the present invention;

[0013] Figure 2 This is a partial structural diagram of a hose of a device for detecting airflow pressure proposed by the present invention;

[0014] Figure 3 for Figure 2 A magnified schematic diagram of .

[0015] Legend:

[0016] 1. Bracket; 2. Pressure gauge; 3. Hose; 4. First pressure measuring tube; 5. Fan body; 6. Metal air duct; 7. Annular pressure measuring tube body; 8. Second pressure measuring tube. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings of the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Reference Figure 1-Figure 3 , the utility model provides an embodiment: a device for detecting airflow pressure, comprising a fan body 5, a metal air duct 6 is provided on the outer wall of the fan body 5, a bracket 1 is fixedly connected to the outer wall of the metal air duct 6, a pressure gauge 2 is provided on the outer wall of the bracket 1, an annular pressure measuring tube body 7 is provided on the outer wall of the metal air duct 6, a first pressure measuring tube 4 is provided on the outer wall of the annular pressure measuring tube body 7, a hose 3 is provided at one end of the first pressure measuring tube 4, one end of the hose 3 is fixedly connected to the outer wall of the pressure gauge 2, and the other end of the hose 3 is fixedly connected to the outer wall of the first pressure measuring tube 4, a plurality of second pressure measuring tubes 8 are opened on the outer wall of the metal air duct 6, one end of the second pressure measuring tube 8 is connected to the inner surface of the metal air duct 6, and the other end of the second pressure measuring tube 8 is connected to the outside atmosphere, and the outer wall of the annular pressure measuring tube body 7 is connected to one end of the plurality of second pressure measuring tubes 8 connected to the atmosphere.

[0019] Specifically, through the metal wind duct 6 set on the outer wall of the fan body 5, through the fixing effect of the metal wind duct 6 on the bracket 1, through the pressure gauge 2 set on the bracket 1, the pressure gauge 2 has the effect of measuring the airflow pressure, through the annular pressure measuring tube body 7 set on the outer wall of the metal wind duct 6, through the hose 3 set at one end of the first pressure measuring tube 4, through the connection effect of one end of the hose 3 on the pressure gauge 2, the hose 3 achieves the effect of connecting the pressure gauge 2 and the first pressure measuring tube 4, and through the second pressure measuring tube 8 one end is connected to the outside atmosphere and the other end is connected to the annular pressure measuring tube body 7, the effect of measuring the cross-sectional pressure is achieved.

[0020] Working principle: When the device is needed, a section is selected at the metal duct 6 on the outer wall of the fan body 5. The section should be selected at a position with a simple structure and stable airflow. A plurality of second pressure measuring tubes 8 are evenly arranged along the circumference of the section. One end of the second pressure measuring tube 8 is connected to the inner surface of the metal duct 6, and the other end extends to the outside atmosphere. The second pressure measuring tube 8 connects the metal duct 6 and the outside atmosphere. A circle of annular pressure measuring tube bodies 7 is arranged on the outside of the metal duct 6. The annular pressure measuring tube body 7 connects multiple second pressure measuring tubes 8 and one end of the atmosphere. A point is selected on the annular pressure measuring tube body 7. The point needs to be far away from the second pressure measuring tube 8 on the metal duct 6, and the first pressure measuring tube 4 is led out. One end of the first pressure measuring tube 4 It is connected to the annular pressure measuring tube body 7 and the other end is connected to the atmosphere. The pressure gauge 2 is installed on the bracket 1 near the first pressure measuring tube 4. The hose 3 connects the end of the first pressure measuring tube 4 that is connected to the atmosphere to the pressure gauge 2. The airflow enters the second pressure measuring tube 8 evenly arranged on the wind tube from the metal wind tube 6 and then enters the annular pressure measuring tube body 7. A stable airflow is formed in the annular pressure measuring tube body 7, which is led out by the first pressure measuring tube 4 and enters the pressure gauge 2 through the hose 3. At this time, a stable airflow pressure is read on the pressure gauge 2. In addition, two different cross-sections are selected from the metal wind tube 6 of the fan body 5, and the airflow pressures of the two cross-sections are measured respectively. The pressure difference and airflow flow rate and other information can be calculated to provide feedback on the fan performance.

[0021] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting airflow pressure, comprising a fan body (5), characterized in that: The outer wall of the fan body (5) is provided with a metal wind tube (6), the outer wall of the metal wind tube (6) is fixedly connected to a bracket (1), the outer wall of the bracket (1) is provided with a pressure gauge (2), the outer wall of the metal wind tube (6) is provided with an annular pressure measuring tube body (7), the outer wall of the annular pressure measuring tube body (7) is provided with a first pressure measuring tube (4), one end of the first pressure measuring tube (4) is provided with a hose (3), one end of the hose (3) is fixedly connected to the outer wall of the pressure gauge (2), and the other end of the hose (3) is fixedly connected to the outer wall of the first pressure measuring tube (4).

2. The device for detecting airflow pressure according to claim 1, characterized in that: A plurality of second pressure measuring tubes (8) are provided on the outer wall of the metal wind tube (6).

3. The device for detecting airflow pressure according to claim 2, characterized in that: One end of the second pressure measuring tube (8) is connected to the inner surface of the metal wind tube (6).

4. The device for detecting airflow pressure according to claim 2, characterized in that: The other end of the second pressure measuring tube (8) is connected to the outside atmosphere.

5. The device for detecting airflow pressure according to claim 1, characterized in that: The outer wall of the annular pressure measuring tube body (7) is connected to one end of a plurality of second pressure measuring tubes (8) connected to the atmosphere.

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