Purging device for measuring pipe flowmeter

Abstract

The utility model discloses a purging device for a measuring pipe flowmeter, and relates to the technical field of instrument auxiliary equipment in the automation technology. The device comprises a purging pipeline assembly, the purging pipeline assembly comprises a vertical pipeline, a first transverse pipeline and a second transverse pipeline, the first transverse pipeline and the second transverse pipeline are arranged on one side of the vertical pipeline, and one end of the first transverse pipeline and one end of the second transverse pipeline are connected with the two ends of the vertical pipeline through bent pipes respectively. A third transverse pipeline and a fourth transverse pipeline are arranged on the other side of the vertical pipeline, and one end of the third transverse pipeline and one end of the fourth transverse pipeline are directly connected with the vertical pipeline; independent valves are arranged on the first transverse pipeline, the second transverse pipeline, the third transverse pipeline and the fourth transverse pipeline. The blowing device can solve the problems that when an existing blowing device blows a plug-in measuring pipe flowmeter, the blowing process is tedious, and a large amount of manpower and time are consumed.

Description

Technical Field

[0001] This utility model relates to the field of automation technology instrumentation auxiliary equipment technology, and in particular to a purging device for a tube flowmeter. Background Technology

[0002] Currently, blast furnace gas, converter gas, and mixed coke oven gas are all measured using insertion tube flow meters. Insertion tube flow meters primarily measure fluid flow based on the differential pressure principle. The measuring tube measures the total pressure of the fluid at its location through a total pressure tap on the upstream side and the static pressure through a static pressure tap on the downstream side. The total pressure and static pressure pass sequentially from bottom to top through the differential pressure output base, a purge adapter with positive and negative drain valves, a three-valve manifold, and finally to the differential pressure transmitter. The transmitter outputs a differential pressure signal, which the control system uses to calculate the average velocity and flow rate of the medium at the measured pipe cross-section based on relevant parameters. Insertion tube flow meters are characterized by their simple structure and high measurement accuracy. However, due to the small inner diameter of the pressure taps and the presence of many impurities in the measured gas, they are easily clogged or heavily dusty, significantly affecting the accuracy of the measurement.

[0003] The current method for handling this type of fault involves connecting the positive and negative drain valves of the flowmeter purging adapter block to a medium-pressure nitrogen source via air pipes. Then, opening the drain valve and the gas source valve allows for backflushing with medium-pressure nitrogen to blow impurities from the flowmeter into the pipeline, achieving the purging purpose. However, this purging device can only connect one drain valve at a time to purge one side of the flowmeter components. After purging, the other drain valve is connected separately to purge the other side. Furthermore, to determine if the purging was successful, the air pipe connected to the drain valve needs to be disconnected to observe if any gas is emitted from the drain valve. If not, the purging was unsuccessful, and the air pipe needs to be reconnected for re-purging. Therefore, the entire purging process is not only cumbersome but also consumes a significant amount of manpower and time. Utility Model Content

[0004] The purpose of this invention is to provide a purging device for tube flowmeters, which can solve the problem that existing purging devices are not only cumbersome in purging tube flowmeters, but also consume a lot of manpower and time.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: This tube flowmeter purging device includes a purging pipe assembly, which includes a vertical pipe and a first and a second horizontal pipe located on one side of the vertical pipe. One end of the first and the second horizontal pipes are connected to both ends of the vertical pipe via bends. A third and a fourth horizontal pipe are provided on the other side of the vertical pipe, and one end of the third and the fourth horizontal pipes are directly connected to the vertical pipe. Each of the first, second, third, and fourth horizontal pipes is equipped with an independent valve.

[0006] A more specific technical solution than the above-mentioned technical solution may be that: the other end of the first transverse pipe, the other end of the second transverse pipe, and the other end of the third transverse pipe are all provided with a flexible joint.

[0007] Furthermore, the length of the third transverse pipe is greater than the length of the fourth transverse pipe.

[0008] Furthermore, the purging pipe assembly is made of copper tubing.

[0009] Furthermore, the valve is a ball valve.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0011] This invention is simple and convenient to operate. It can not only purge both sides of the flow meter at the same time, but also determine whether the purging is successful without disassembling the purging device. The operation process is greatly simplified, saving manpower and time costs, making the purging work efficient and convenient, and effectively ensuring the continuity of production. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram illustrating the application of this utility model. Detailed Implementation

[0014] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0015] like Figure 1 The purging device for the flowmeter shown includes a purging pipe assembly, which includes a vertical pipe 1 and a first transverse pipe 2 and a second transverse pipe 3 located on one side of the vertical pipe 1. One end of the first transverse pipe 2 and one end of the second transverse pipe 3 are connected to both ends of the vertical pipe 1 via bends. On the other side of the vertical pipe 1, a third transverse pipe 4 and a fourth transverse pipe 5 are provided. One end of the third transverse pipe 4 and one end of the fourth transverse pipe 5 are directly connected to the vertical pipe 1. A first valve 6, a second valve 7, a third valve 8, and a fourth valve 9 are respectively provided on the first transverse pipe 2, the second transverse pipe 3, the third transverse pipe 4, and the fourth transverse pipe 5. The first valve 6 and the second valve 7 serve as the inlet branch valves of the positive and negative drain valves of the flowmeter, respectively. The third valve 8 serves as the main inlet valve, and the fourth valve 9 serves as the exhaust valve.

[0016] The other ends of the first transverse pipe 2, the second transverse pipe 3, and the third transverse pipe 4 are respectively provided with a first union 10, a second union 11, and a third union 12.

[0017] The length of the third transverse pipe 4 is greater than the length of the fourth transverse pipe 5.

[0018] Copper pipe is the preferred material for the purging pipe assembly of this utility model, and ball valve is the preferred type of valve of this utility model.

[0019] like Figure 2 As shown, in use, the first horizontal pipe 2 and the second horizontal pipe 3 are connected to the positive and negative drain valves 13 and 14 of the flowmeter purging adapter block via the first union 10 and the second union 11, respectively. The third horizontal pipe 4 is connected to the medium-pressure nitrogen source via the third union 12. Then, the fourth valve 9 is closed, and the first valve 6, the second valve 7, and the third valve 8 are opened. The medium-pressure nitrogen can then purge both sides of the flowmeter simultaneously through the purging pipe assembly. After purging, the third valve 8 is closed, and the fourth valve 9 is opened to observe whether gas is discharged. If not, it indicates that the purging was unsuccessful. The fourth valve 9 is then closed, and the third valve 8 is opened to purge again. The first valve 6 and the second valve 7 can be opened or closed separately to purge or observe only one side of the flowmeter.

[0020] This invention is simple and convenient to operate. It can simultaneously purge both sides of the flow meter and determine the success of the purging without disassembling the purging device. The operation process is greatly simplified, significantly saving manpower and time costs, making the purging work more efficient and convenient, and effectively ensuring the continuity of production. In practical application, the purging time for a single operation has been reduced from about 40 minutes to about 10 minutes. This reduction in purging time means less time for personnel to work in the gas area, greatly reducing the risk of poisoning.

Claims

1. A purging device for a tube flowmeter, characterized in that: The system includes a purging pipe assembly, which comprises a vertical pipe and a first and a second transverse pipe located on one side of the vertical pipe. One end of the first and the second transverse pipes are connected to both ends of the vertical pipe via bends. A third and a fourth transverse pipe are located on the other side of the vertical pipe, with one end of the third and the fourth transverse pipes directly connected to the vertical pipe. Each of the first, second, third, and fourth transverse pipes is equipped with an independent valve.

2. The pipe flow meter purging apparatus of claim 1, wherein: The other ends of the first transverse pipe, the second transverse pipe, and the third transverse pipe are all provided with flexible joints.

3. The flow meter purging apparatus of claim 2, wherein: The length of the third transverse pipe is greater than the length of the fourth transverse pipe.

4. The pipe flow meter purging apparatus of any one of claims 1 to 3, wherein: The purging pipe assembly is made of copper tubing.

5. The pipe flow meter purging apparatus of claim 4, wherein: The valve is a ball valve.

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