Drainage device for pressure guide pipe of differential pressure transmitter of V-cone gas flow meter

Abstract

The utility model relates to a drainage device for a pressure guide pipe of a differential pressure transmitter of a V-cone gas flow meter, and belongs to the technical field of differential pressure transmitters. Comprising a V-cone flowmeter, the V-cone flowmeter is connected with a flowmeter high-pressure guide pipe and a flowmeter low-pressure guide pipe, the flowmeter high-pressure guide pipe is connected with a differential pressure transmitter high-pressure pipe, and the flowmeter low-pressure guide pipe is connected with a differential pressure transmitter low-pressure pipe; the differential pressure transmitter high-pressure pipe and the differential pressure transmitter low-pressure pipe are connected with a three-valve group, and the three-valve group is connected with the differential pressure transmitter; a high-pressure three-way valve is arranged on the differential pressure transmitter high-pressure pipe, a low-pressure three-way valve is arranged on the differential pressure transmitter low-pressure pipe, and an electromagnetic valve is connected between the high-pressure three-way valve and the low-pressure three-way valve. Accumulation of water vapor in the low-pressure pipe of the differential pressure transmitter is reduced, the manual water discharge amount is reduced, the accuracy of the flowmeter is guaranteed, and meanwhile the safety of personnel is guaranteed.

Description

Technical Field

[0001] The utility model relates to a pressure pipe drainage device of a V-cone gas flowmeter differential pressure transmitter, belonging to the technical field of differential pressure transmitters. Background Art

[0002] In the daily production process of metallurgical enterprises, hot blast furnaces, ignition furnaces, etc. are all heated by gas, most of which is blast furnace gas. Blast furnace gas contains a lot of water, which can easily lead to the differential pressure transmitter pressure pipe in the V-cone flowmeter often needing to be drained to ensure the accuracy of gas flow. Gas is a dangerous gas, and there are safety hazards when opening the differential pressure transmitter pressure pipe drain valve, which may cause gas poisoning. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a V-cone gas flowmeter differential pressure transmitter pressure pipe drainage device for the above-mentioned prior art, which can drain the pressure pipe, ensure the accuracy of the flowmeter, avoid gas poisoning of personnel, and improve safety.

[0004] The technical solution adopted by the utility model to solve the above problems is: a V-cone gas flowmeter differential pressure transmitter pressure pipe drainage device, comprising a V-cone flowmeter, the V-cone flowmeter is connected with a flowmeter high-pressure conduit and a flowmeter low-pressure conduit, the flowmeter high-pressure conduit is connected with the differential pressure transmitter high-pressure pipe, and the flowmeter low-pressure conduit is connected with the differential pressure transmitter low-pressure pipe; the differential pressure transmitter high-pressure pipe and the differential pressure transmitter low-pressure pipe are connected with a three-valve group, and the three-valve group is connected with the differential pressure transmitter; the differential pressure transmitter high-pressure pipe is provided with a high-pressure three-way valve, the differential pressure transmitter low-pressure pipe is provided with a low-pressure three-way valve, and a solenoid valve is connected between the high-pressure three-way valve and the low-pressure three-way valve; the flowmeter high-pressure conduit is provided with a high-pressure outlet manual valve, the high-pressure outlet manual valve is arranged at the high-pressure outlet of the V-cone flowmeter, and the flowmeter high-pressure conduit is provided with a high-pressure ball valve; the flowmeter low-pressure conduit is provided with a low-pressure outlet manual valve, and the low-pressure outlet manual valve is arranged at the low-pressure outlet of the V-cone flowmeter; the flowmeter low-pressure conduit is provided with a low-pressure ball valve.

[0005] The flow meter high pressure conduit is also provided with a high pressure extension tube, and the high pressure extension tube is provided with a high pressure drain valve.

[0006] A low-pressure extension pipe is arranged on the low-pressure conduit of the flow meter, and a low-pressure drain valve is arranged on the low-pressure extension pipe.

[0007] Compared with the prior art, the utility model has the following advantages: a V-cone gas flowmeter differential pressure transmitter pressure pipe drainage device, the solenoid valve is controlled by a time relay, the solenoid valve is opened regularly to connect the gas high-pressure end airflow with the low-pressure end airflow, and the relatively high gas pressure at the high-pressure end is used to gradually blow back the low-pressure end gas, so that the condensate at the low-pressure port is blown away, reducing the accumulation of water vapor in the low-pressure pipe of the differential pressure transmitter, reducing the amount of artificial drainage, ensuring the accuracy of the flow meter while also ensuring the safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a pressure pipe drainage device of a V-cone gas flowmeter differential pressure transmitter according to an embodiment of the utility model;

[0009] Figure 2 This is a sequential control diagram of a pressure pipe drainage device of a V-cone gas flowmeter differential pressure transmitter according to an embodiment of the utility model;

[0010] In the figure, 1 V cone flowmeter, 2 high-pressure outlet manual valve, 3 low-pressure outlet manual valve, 4 flowmeter high-pressure conduit, 5 flowmeter low-pressure conduit, 6 high-pressure ball valve, 7 low-pressure ball valve, 8 high-pressure extension pipe, 9 high-pressure drain valve, 10 low-pressure extension pipe, 11 low-pressure drain valve, 12 differential pressure transmitter, 13 three-valve group, 14 solenoid valve, 15 high-pressure three-way valve, 16 low-pressure three-way valve, 17 differential pressure transmitter high-pressure pipe, 18 differential pressure transmitter low-pressure pipe. DETAILED DESCRIPTION

[0011] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0012] like Figure 1 , 2As shown, a V-cone gas flowmeter differential pressure transmitter pressure pipe drainage device in this embodiment includes a V-cone flowmeter 1, the high-pressure outlet of the V-cone flowmeter 1 is connected to the high-pressure conduit 4 of the flowmeter, the low-pressure outlet of the V-cone flowmeter 1 is connected to the low-pressure conduit 5 of the flowmeter, the high-pressure conduit 4 of the flowmeter is connected to the high-pressure pipe 17 of the differential pressure transmitter, the low-pressure conduit 5 of the flowmeter is connected to the low-pressure pipe 18 of the differential pressure transmitter, the high-pressure pipe 17 of the differential pressure transmitter and the low-pressure pipe 18 of the differential pressure transmitter are connected to the three-valve group 13, and the three-valve group 13 is connected to the differential pressure transmitter 12. A high-pressure three-way valve 15 is provided on the high-pressure pipe 17 of the differential pressure transmitter, and the high-pressure three-way valve 15 is arranged at the high-pressure inlet of the three-valve group 13. A low-pressure three-way valve 16 is provided on the low-pressure pipe 18 of the differential pressure transmitter, and the low-pressure three-way valve 16 is arranged at the low-pressure inlet of the three-valve group 13. A solenoid valve 14 is connected between the high-pressure three-way valve 15 and the low-pressure three-way valve 16. When the solenoid valve 14 is opened, the differential pressure transmitter high pressure pipe 17 is connected to the differential pressure transmitter low pressure pipe 18. The flowmeter high pressure conduit 4 is provided with a high pressure outlet manual valve 2, which is arranged at the high pressure outlet of the V-cone flowmeter 1, and a high pressure ball valve 6 is arranged on the flowmeter high pressure conduit 4. The flowmeter low pressure conduit 5 is provided with a low pressure outlet manual valve 3, which is arranged at the low pressure outlet of the V-cone flowmeter 1, and a low pressure ball valve 7 is arranged on the flowmeter low pressure conduit 5.

[0013] The electric control box of the solenoid valve has the function of machine-side switch and time timing. The timing time can be set according to the usual V-cone flowmeter pipe blocking time, and then the solenoid valve is automatically opened to connect the high-pressure pipe of the differential pressure transmitter with the low-pressure pipe of the differential pressure transmitter. With the help of the pressure at the high-pressure end of the differential pressure transmitter, the formed water seal is gradually refluxed from the low-pressure pipe of the differential pressure transmitter until all the accumulated water is refluxed from the low-pressure pipe side of the differential pressure transmitter to the gas pipeline, and the outlet of the V-cone flowmeter is backwashed to reduce the accumulation of water vapor in the low-pressure pipe of the differential pressure transmitter, ensuring the accuracy of the V-cone flowmeter measurement. After a certain period of purging, the solenoid valve is automatically closed.

[0014] The high-pressure conduit 4 of the flow meter is also provided with a high-pressure extension tube 8, and the high-pressure extension tube 8 is provided with a high-pressure drain valve 9. The low-pressure conduit 5 of the flow meter is provided with a low-pressure extension tube 10, and the low-pressure extension tube 10 is provided with a low-pressure drain valve 11. When the high-pressure drain valve and the low-pressure drain valve are opened, the high-pressure conduit and the low-pressure conduit are convenient for draining water.

[0015] The solenoid valve is controlled by a time relay, which opens the solenoid valve regularly to connect the gas flow at the high-pressure end with the gas flow at the low-pressure end. The relatively high gas pressure at the high-pressure end is used to gradually blow back the gas at the low-pressure end, so that the condensate at the low-pressure port is blown away, reducing the accumulation of water vapor in the low-pressure pipe of the differential pressure transmitter and reducing the amount of artificial drainage, thereby ensuring the accuracy of the flow meter and the safety of personnel.

[0016] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A pressure pipe drainage device for a V-cone gas flowmeter differential pressure transmitter, characterized in that: It comprises a V-cone flowmeter, the V-cone flowmeter is connected with a flowmeter high-pressure conduit and a flowmeter low-pressure conduit, the flowmeter high-pressure conduit is connected with a differential pressure transmitter high-pressure pipe, and the flowmeter low-pressure conduit is connected with a differential pressure transmitter low-pressure pipe; the differential pressure transmitter high-pressure pipe and the differential pressure transmitter low-pressure pipe are connected with a three-valve group, and the three-valve group is connected with the differential pressure transmitter; a high-pressure three-way valve is provided on the differential pressure transmitter high-pressure pipe, a low-pressure three-way valve is provided on the differential pressure transmitter low-pressure pipe, and an electromagnetic valve is connected between the high-pressure three-way valve and the low-pressure three-way valve; the flowmeter high-pressure conduit is provided with a high-pressure outlet manual valve, the high-pressure outlet manual valve is arranged at the high-pressure outlet of the V-cone flowmeter, and a high-pressure ball valve is provided on the flowmeter high-pressure conduit; the flowmeter low-pressure conduit is provided with a low-pressure outlet manual valve, and the low-pressure outlet manual valve is arranged at the low-pressure outlet of the V-cone flowmeter; the flowmeter low-pressure conduit is provided with a low-pressure ball valve.

2. A pressure pipe drainage device for a V-cone gas flowmeter differential pressure transmitter according to claim 1, characterized in that: The flow meter high pressure conduit is also provided with a high pressure extension tube, and the high pressure extension tube is provided with a high pressure drain valve.

3. The pressure pipe drainage device of a V-cone gas flowmeter differential pressure transmitter according to claim 1, characterized in that: A low-pressure extension pipe is arranged on the low-pressure conduit of the flow meter, and a low-pressure drain valve is arranged on the low-pressure extension pipe.

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