Double-parameter gas mass flowmeter

Abstract

The utility model discloses a double-parameter gas mass flow meter, which comprises a measuring tube, a differential pressure type monitoring and measuring structure, a gas flow meter and a gas flow meter, the differential pressure type monitoring and measuring structure comprises a pair of connecting pipes, a pair of connecting flanges, a pair of pressure guiding pipelines, a differential pressure transmitter, a vortex shedding flowmeter and a pair of plug-in sealing assemblies. The utility model relates to the technical field of flow meters, in particular to a gas mass flow meter which has the advantages that the problems that an existing gas mass flow meter often needs to detect mixed gas in real time, namely mixed gas containing multi-component media, such as dry gas, raw material gas, natural gas, mixed coal gas and steam; due to complex component conditions, the mass flow rate is difficult to measure by adopting a conventional device. In the prior art, a method that a volume flowmeter is matched with a component analyzer or an online densitometer to realize correction is adopted on a small and medium-caliber pipeline, the detection result is inaccurate, the flow quality cannot be detected in real time, and the price is high.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, in particular to a dual-parameter gas mass flow meter. Background Art

[0002] A flow meter is an instrument that indicates the measured flow rate and / or the total amount of fluid in a selected time interval. In simple terms, it is an instrument used to measure the flow rate of fluid in a pipeline or open channel. Existing gas mass flow meters often need to detect mixed gases in real time, that is, mixed gases containing multi-component media, such as dry gas, raw gas, natural gas, mixed coal gas, steam, etc.; due to the complexity of its components, it is difficult to measure its mass flow rate using conventional devices. The method of using a volume flow meter with a component analyzer or an online density meter to achieve correction on small and medium-caliber pipelines has inaccurate test results, cannot detect the flow quality in real time, and is expensive. Utility Model Content

[0003] To achieve the above objectives, the utility model is implemented through the following technical solutions: a dual-parameter gas mass flow meter, comprising: a measuring tube, on which a differential pressure monitoring and measuring structure is installed;

[0004] The differential pressure monitoring and measuring structure includes: a pair of connecting pipes, a pair of connecting flanges, a pair of pressure-leading pipelines, a differential pressure transmitter, a vortex flowmeter and a pair of plug-in sealing components;

[0005] A pair of connecting pipes are installed at the pipe openings at both ends of the measuring pipe, a pair of connecting flanges are installed on the pair of connecting pipes, the lower ends of a pair of pressure-leading pipelines are embedded on the upper wall of the measuring pipe, a differential pressure transmitter is installed on the upper ends of a pair of pressure-leading pipelines, a vortex flowmeter is embedded in the middle of the measuring pipe, and a pair of plug-in sealing components are installed on the pair of connecting flanges.

[0006] Preferably, a pair of valves are installed on a pair of pressure-guiding pipelines.

[0007] Preferably, a pair of connecting flanges are provided with a plurality of combined fixing holes.

[0008] Preferably, a pair of pressure-leading pipelines are installed on the differential pressure transmitter through a three-valve group.

[0009] Preferably, a pair of plug-in sealing components each comprises: a plug-in sleeve and a rubber sealing ring;

[0010] The plug-in sleeve is installed on the connecting flange, and the rubber sealing ring is sleeved on the plug-in sleeve.

[0011] Preferably, a fixing groove is provided on the insertion sleeve.

[0012] Beneficial Effects

[0013] The utility model provides a dual-parameter gas mass flowmeter, which has the following beneficial effects: This solution uses a differential pressure monitoring and measuring structure, and calculates the real-time density of the fluid according to the law of conservation of mass through the flow velocity signal and the differential pressure signal of the flow monitoring, and then calculates the mass flow rate to ensure the detection result, which solves the problem that the existing gas mass flowmeter often needs to detect mixed gases in real time, that is, mixed gases containing multi-component media, such as: dry gas, raw gas, natural gas, mixed coal gas, steam, etc.; due to its complex components, it is difficult to measure its mass flow rate using conventional devices. The method of using a volume flowmeter with a component analyzer or an online density meter to achieve correction on small and medium-caliber pipelines has inaccurate detection results, cannot detect the flow quality in real time, and is expensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a dual-parameter gas mass flowmeter described in the utility model.

[0015] Figure 2 This is a schematic diagram of the main structure of a dual-parameter gas mass flowmeter described in the utility model.

[0016] In the figure: 1. Measuring tube; 2. Connecting pipe; 3. Connecting flange; 4. Pressure-leading pipeline; 5. Differential pressure transmitter; 6. Vortex flowmeter; 7. Valve; 8. Combined fixing hole; 9. Three-valve group; 10. Insert sleeve; 11. Rubber sealing ring; 12. Fixing groove. DETAILED DESCRIPTION

[0017] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0018] Example: See Figure 1-2 , the utility model provides a technical solution: a dual-parameter gas mass flowmeter. This solution takes into account that the traditional gas mass flowmeter detects the medium density by the vibration detected by the vibration tube connected to the sensor during detection, but the structure is complex, the measurement error is large, and the detection result is inaccurate. Based on the above content, this case sets the following technical means;

[0019] Specifically, the device at least includes a measuring tube 1, a pair of connecting tubes 2, a pair of connecting flanges 3, a pair of pressure-leading pipelines 4, a differential pressure transmitter 5, a vortex flowmeter 6 and a pair of plug-in sealing components;

[0020] The plug-in sealing assembly includes: a plug-in sleeve 10 and a rubber sealing ring 11;

[0021] A pair of insert sleeves 10 are inserted into the connecting pipes on both sides, and the sealing of the connection is ensured by a rubber sealing ring 11, and the connection is fixed by a connecting flange 3 to achieve a firm installation. When the fluid flows through the measuring pipe through the connecting pipe, the vortex flowmeter 6 detects the flow rate of the fluid through a sensor extending into the measuring pipe 1, and at the same time opens the valve 7 on the pressure-leading pipe 4, and adjusts the pressure difference through the three-valve group 9. The differential pressure transmitter 5 detects the pressure difference signal related to the mass flow generated by the upstream and downstream of the vortex flowmeter 6. The differential pressure signal generated between the upstream and downstream is related to the fluid density, while the pulse signal generated by the vortex flowmeter 6 is not related to the fluid density. The real-time density of the fluid is calculated according to the principle of conservation of mass using a flow computer dedicated to the FC2000-IAD (Z) mass flowmeter, and the mass flow is further calculated.

[0022] More specifically, a pair of connecting pipes 2 are installed at the pipe openings at both ends of the measuring pipe 1, a pair of connecting flanges 3 are installed on the pair of connecting pipes 2, the lower ends of a pair of pressure-leading pipelines 4 are embedded on the upper wall surface of the measuring pipe 1, a differential pressure transmitter 5 is installed on the upper ends of the pair of pressure-leading pipelines 4, a vortex flowmeter 6 is embedded in the middle position of the measuring pipe 1, and a pair of plug-in sealing assemblies are installed on the pair of connecting flanges 3;

[0023] The insert sleeve 10 is installed on the connecting flange 3 , and the rubber sealing ring 11 is sleeved on the insert sleeve 10 .

[0024] In the specific implementation process, further, a pair of valves 7 are installed on the pair of pressure-leading pipelines 4 .

[0025] In the specific implementation process, further, a pair of connecting flanges 3 are provided with a plurality of combined fixing holes 8 .

[0026] In the specific implementation process, further, a pair of pressure-leading pipelines 4 are installed on the differential pressure transmitter 5 through a three-valve group 9 .

[0027] In the specific implementation process, further, a fixing groove 12 is opened on the insertion sleeve 10 .

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-parameter gas mass flow meter, comprising: The measuring tube (1) is characterized in that a differential pressure monitoring and measuring structure is installed on the measuring tube (1); The differential pressure monitoring and measuring structure comprises: a pair of connecting pipes (2), a pair of connecting flanges (3), a pair of pressure-leading pipelines (4), a differential pressure transmitter (5), a vortex flowmeter (6) and a pair of plug-in sealing components; A pair of connecting pipes (2) are installed at the pipe openings at both ends of the measuring pipe (1), a pair of connecting flanges (3) are installed on the pair of connecting pipes (2), the lower ends of a pair of pressure-inducing pipelines (4) are embedded in the upper wall surface of the measuring pipe (1), a differential pressure transmitter (5) is installed at the upper ends of the pair of pressure-inducing pipelines (4), a vortex flowmeter (6) is embedded in the middle position of the measuring pipe (1), and a pair of plug-in sealing components are installed on the pair of connecting flanges (3).

2. A dual-parameter gas mass flowmeter according to claim 1, characterized in that: A pair of valves (7) are installed on the pair of pressure-guiding pipelines (4).

3. A dual-parameter gas mass flowmeter according to claim 1, characterized in that: A pair of connecting flanges (3) are provided with a plurality of combined fixing holes (8).

4. A dual-parameter gas mass flow meter according to claim 1, characterized in that: A pair of pressure-conducting pipelines (4) are installed on the differential pressure transmitter (5) via a three-valve group (9).

5. A dual-parameter gas mass flow meter according to claim 1, characterized in that: A pair of plug-in sealing components each comprises: a plug-in sleeve (10) and a rubber sealing ring (11); The insert sleeve (10) is installed on the connecting flange (3), and the rubber sealing ring (11) is sleeved on the insert sleeve (10).

6. A dual-parameter gas mass flow meter according to claim 5, characterized in that: A fixing groove (12) is provided on the insertion sleeve (10).

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