Gas measuring device suitable for low flow

Abstract

The utility model discloses a gas measuring device suitable for low flow, which relates to the technical field of flow measurement, and comprises a main body, one side of the main body is in threaded connection with a shell, an inner pipe is arranged in the shell, a floating ball and an inner pipe O-shaped ring are arranged in the inner pipe, a filter screen is arranged in the main body, and the inner pipe O-shaped ring is arranged in the filter screen. The main body is provided with a filter screen, one side of the filter screen is provided with a tubular conical nut, the main body is further provided with a valve rod, one end of the valve rod is sleeved with a valve rod O-shaped ring and a meson, the other end of the valve rod is provided with a nut, the nut is sleeved with a nut O-shaped ring, the nut O-shaped ring is sleeved with a knob, and a sealing gasket is arranged at the threaded connection position of the main body and the shell. And a buffer pad is arranged at the bottom of the inner pipe. The float flowmeter is generally relatively simple to install and maintain, simple in structure and relatively low in cleaning and maintenance requirements, in addition, the structure and the principle of the float flowmeter are easy to understand and operate, calibration and adjustment can be rapidly carried out, and the cost is relatively low.

Description

Technical Field

[0001] The utility model relates to the technical field of flow measurement, in particular to a gas measuring device suitable for low flow. Background Art

[0002] Gas flowmeters are installed in pipelines to record the amount of gas flowing through them. They are used to measure the flow of gases such as air, nitrogen, coal gas, and hydrogen, and are widely used in the fields of metallurgy, coal, chemical industry, and petroleum. Hundreds of flowmeters have been launched on the market, and many difficult problems have been solved. However, for small flows and low flow rates, when the pressure difference is less than 100 Pa, and under the influence of factors such as structure and strength, it is not appropriate to directly use a thinner pipeline to measure the flow rate. Direct differential pressure measurement is not possible. In the Chinese patent publication number CN102759381A, a low-flow gas differential pressure flow measurement device is proposed. This device converts the measurement of low-flow and low-pressure gas flow in a larger main pipeline diameter into measurement in a smaller measuring pipeline, ensuring the strength of the main pipeline structure, small pressure loss, a relatively wide measuring range, high reliability, simple installation, and low cost. After studying the above patents and prior art, it was found that the gas measurement devices in the prior art have complex structures and high cleaning and maintenance requirements. Therefore, the present invention proposes a gas measurement device suitable for low flow rates. Utility Model Content

[0003] Technical problems solved

[0004] The purpose of the utility model is to remedy the deficiencies of the prior art and to provide a gas measuring device suitable for low flow rates.

[0005] Technical Solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas measuring device suitable for low flow, comprising a main body, a shell being threadedly connected to one side of the main body, an inner tube being arranged inside the shell, a float and an inner tube O-ring being arranged in the inner tube, a filter being installed inside the main body, a tube tapered nut being arranged on one side of the filter, the main body being further provided with a valve stem, a valve stem O-ring and a meson being sleeved on one end of the valve stem, a nut being sleeved on the nut, and a knob being sleeved on the outside of the nut O-ring. The installation and maintenance of the flowmeter of the present invention are generally relatively simple, and its structure is simple, and the requirements for cleaning and maintenance are low. In addition, the structure and principle of the float flowmeter are also easy to understand and operate, and can be calibrated and adjusted quickly, with relatively low cost.

[0007] Preferably, a sealing gasket is provided at the threaded connection between the main body and the shell.

[0008] Preferably, a buffer pad is provided at the bottom of the inner tube.

[0009] Preferably, the tubular tapered nut is threadedly connected to the main body, and a threaded hole for mounting the tubular tapered nut is provided on the main body.

[0010] Preferably, the nut is threadedly connected to the main body, and the main body is also provided with a threaded hole for installing the nut.

[0011] Preferably, the interior of the main body is a communicating channel, and one side of the main body is further provided with a connection portion for connecting to a device to be tested.

[0012] Beneficial effects:

[0013] Compared with the existing technology, this gas measurement device suitable for low flow has the following beneficial effects:

[0014] The installation and maintenance of the flow meter of the present invention are generally relatively simple, and its structure is simple, and the requirements for cleaning and maintenance are low. In addition, the structure and principle of the float flow meter are also easy to understand and operate, and can be calibrated and adjusted quickly, and the cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 This is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 2 It is a structural diagram of the utility model;

[0018] Figure 3 It is a structural diagram of the main body of the utility model.

[0019] In the picture:

[0020] 1. Knob; 2. Nut; 3. Nut O-ring; 4. Valve stem; 5. Valve stem O-ring; 6. Meson; 7. Body; 8. Filter; 9. Tube tapered nut; 10. Gasket; 11. Inner tube O-ring; 12. Float; 13. Inner tube; 14. Buffer; 15. Housing. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments 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.

[0022] See also Figures 1 to 3 As shown, the utility model provides a technical solution: a gas measuring device suitable for low flow, including a main body 7, a shell 15 is threadedly connected to one side of the main body 7, an inner tube 13 is arranged inside the shell 15, a float 12 and an inner tube O-ring 11 are arranged in the inner tube 13, a filter screen 8 is installed inside the main body 7, a tube tapered nut 9 is arranged on one side of the filter screen 8, the main body 7 is also provided with a valve stem 4, a valve stem O-ring 5 and a meson 6 are sleeved on one end of the valve stem 4, a nut 2 is provided on the other end of the valve stem 4, a nut O-ring 3 is sleeved on the nut 2, and a knob 1 is sleeved on the outside of the nut O-ring 3. The installation and maintenance of the flowmeter of the utility model are usually relatively simple, and its structure is simple, and the requirements for cleaning and maintenance are low. In addition, the structure and principle of the float flowmeter are also easy to understand and operate, and can be calibrated and adjusted quickly, and the cost is relatively low.

[0023] Please pay attention to Figure 1 and Figure 3 A sealing gasket 10 is provided at the threaded connection between the main body 7 and the shell 15, and the sealing gasket 10 can ensure the sealing between the main body 7 and the shell 15.

[0024] Please pay attention to Figure 1 and Figure 2 A buffer pad 14 is provided at the bottom of the inner tube 13, which provides auxiliary protection for the inner tube 13 and achieves the effect of buffering and shock absorption. The tubular conical nut 9 is threadedly connected to the main body 7, and a threaded hole for installing the tubular conical nut 9 is provided on the main body 7. The nut 2 is threadedly connected to the main body 7, and a threaded hole for installing the nut 2 is also provided on the main body 7. The interior of the main body 7 is a connected channel, and a connection portion 701 for connecting to the device under test is also provided on one side of the main body 7.

[0025] Working Principle: The installation and maintenance of the flow meter of this utility model are usually relatively simple, and its structure is simple, and the requirements for cleaning and maintenance are low. In addition, the structure and principle of the float flow meter are also easy to understand and operate, and can be calibrated and adjusted quickly, and the cost is relatively low.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas measuring device suitable for low flow, comprising a main body (7), characterized in that: One side of the main body (7) is threadedly connected to an outer shell (15), an inner tube (13) is provided inside the outer shell (15), a float (12) and an inner tube O-ring (11) are provided in the inner tube (13), a filter (8) is installed inside the main body (7), a tube conical nut (9) is provided on one side of the filter (8), and the main body (7) is also provided with a valve stem (4), one end of the valve stem (4) is sleeved with a valve stem O-ring (5) and a meson (6), and the other end of the valve stem (4) is provided with a nut (2), a nut O-ring (3) is sleeved on the nut (2), and a knob (1) is sleeved on the outside of the nut O-ring (3).

2. A gas measuring device suitable for low flow according to claim 1, characterized in that: A sealing gasket (10) is provided at the threaded connection between the main body (7) and the housing (15).

3. A gas measuring device suitable for low flow according to claim 1, characterized in that: A buffer pad (14) is provided at the bottom of the inner tube (13).

4. A gas measuring device suitable for low flow according to claim 1, characterized in that: The tubular conical nut (9) is threadedly connected to the main body (7), and a threaded hole for installing the tubular conical nut (9) is provided on the main body (7).

5. The gas measuring device suitable for low flow according to claim 1, characterized in that: The nut (2) is threadedly connected to the main body (7), and the main body (7) is also provided with a threaded hole for installing the nut (2).

6. A gas measuring device suitable for low flow according to claim 1, characterized in that: The interior of the main body (7) is a communicating channel, and one side of the main body (7) is also provided with a connection portion (701) for connecting to a device to be tested.

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