Liquefied gas station bulk valve flow monitoring device

Abstract

The utility model discloses a liquefied gas station scattered valve flow monitoring device which comprises a main path, a bypass branch, a bypass valve, a check valve and a flow meter, and a bypass valve mounting position is arranged on the bypass; a check valve mounting position is arranged on the main path, a power flow meter is further arranged on the main path, an elbow is mounted at an inlet flange of the check valve, and an outlet flange of the check valve is blocked by a blind plate; an inlet flange of the bypass valve is blocked by a blind plate, and an outlet flange of the bypass valve is connected with an upper elbow. By transforming the pipeline at the flange joint and combining the elbow, the flange and the pipeline, no electric wire needs to be laid to be connected to a control room power supply, and power lines and labor cost are saved; meanwhile, the situation that the flowmeter cannot be used due to damage of a power line is also prevented.

Description

Technical Field

[0001] This utility model relates to the field of gas flow detection technology, and in particular to a flow monitoring device for a liquefied gas station's diffuser valve. Background Technology

[0002] To better measure the daily gas discharge from the LPG station's control valve, a flow meter was planned to be installed on the existing pipeline for monitoring. However, on-site inspection revealed difficulties in the modification, primarily due to the following reasons:

[0003] First, since the vent pipe is 15 meters high, the on-site installation location is quite far away, 200 meters away from the power supply in the control room. If a non-battery flow meter is used, the power line needs to be designed, which wastes a lot of time and manpower, and requires a very long power line. Therefore, it is not conducive to laying electrical wires and explosion-proof pipes.

[0004] Secondly, because there are safety regulations prohibiting open flames during construction and installation at gas stations, equipment such as cutting machines, angle grinders, electric welding machines, and gas cutting / welding machines cannot be used during disassembly and installation, which brings great difficulties to the disassembly.

[0005] Third, it was found on site that the pipe bends were not flanged, and there was only a flanged DN125 check valve at the horizontal pipe. In order to prevent the check valve from being damaged, a DN125 flanged bypass was connected in parallel. Because the flanged DN125 flow meter is large, if either the bypass valve or the check valve is removed, the distance is not enough to install the flow meter. Therefore, the site needs to be modified. Utility Model Content

[0006] To address the shortcomings of the existing technology, the purpose of this utility model is to provide a flow monitoring device for a liquefied gas station's diffuser valve. By modifying the pipeline at the flange connection point and combining elbows, flanges, and pipelines, there is no need to lay electrical wires to connect to the control room power supply, saving power cord and labor costs; it also prevents the flow meter from becoming unusable due to damage to the power cord.

[0007] To solve the above problems, the following specific implementation plan is adopted:

[0008] A flow monitoring device for a liquefied gas station's diffuser valve, the monitoring device comprising: a main line and a bypass branch line, a bypass valve, a check valve, and a power flow meter, wherein a bypass valve mounting position is provided on the bypass branch line; a check valve mounting position is provided on the main line, and a power flow meter is also provided on the main line; an elbow is installed at the inlet flange of the check valve, and a blind flange is used to block the outlet flange.

[0009] A blind flange is used to block the inlet flange of the bypass valve, and an elbow is connected to the outlet flange of the bypass valve.

[0010] Furthermore, the check valve mounting position is located above the corresponding position on the main line.

[0011] Furthermore, the bypass valve mounting position is located above the corresponding position of the bypass branch.

[0012] Furthermore, a power flow meter is installed on the pipeline where the check valve and bypass valve converge for measurement.

[0013] In a preferred embodiment of this application, the flow meter is a battery-powered flow meter.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. Using a flow meter can not only measure the amount of gas discharged from the gas station's diffuser valve every day, but also monitor the emission data of the gas discharge, which is of great significance to the production process.

[0016] 2. Since a battery-powered flow meter is used, there is no need to lay electrical wires to connect to the control room power supply, saving on power cord and labor costs. It also prevents the flow meter from becoming unusable due to damage to the power cord.

[0017] 3. Install the flow meter at the end of the valve. This will help to monitor the natural gas flow rate completely. Otherwise, if the flow meter is installed on the check valve, the gas flow rate will not be able to be monitored if the check valve is damaged.

[0018] 4. The entire process involved modifications without any open flame or alteration of the original safety purpose, and is of great significance for metering and monitoring the amount of natural gas released.

[0019] 5. Based on the flange connecting the original bypass valve and check valve, a new pipeline path is created through a combination of elbows, flanges, and pipes to achieve the original effect.

[0020] 6. Block unused entrances or exits with baffles to prevent natural gas leaks. Attached Figure Description

[0021] To more clearly illustrate the structural scheme of this utility model, the accompanying drawings used in this utility model will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of a structure in the prior art;

[0023] Figure 2 This is a front view of the LPG station diffuser valve flow monitoring device of this application;

[0024] Figure 3 This is a top view of the LPG station diffuser valve flow monitoring device of this application;

[0025] In the diagram, 1-bypass valve, 2-check valve, 3-power flow meter, 4-flange, 5-elbow, 6-plug. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This application proposes to install a flow meter 3 on the existing pipeline for better measurement of the daily gas discharge from the LPG station's control valve. However, on-site inspection revealed difficulties in the modification process, primarily due to the following reasons:

[0028] First, since the vent pipe is 15 meters high, the on-site installation location is quite far away, 200 meters away from the power supply in the control room. If a non-battery flow meter 3 is used, a power line design is required, which wastes a lot of time and manpower, and requires a very long power line. Therefore, it is not conducive to laying electrical wires and explosion-proof pipes.

[0029] Secondly, because there are safety regulations prohibiting open flames during construction and installation at gas stations, equipment such as cutting machines, angle grinders, electric welding machines, and gas cutting / welding machines cannot be used during disassembly and installation, which brings great difficulties to the disassembly.

[0030] Third, it was found on site that pipe bend 5 did not use flange 4. There was only a flanged DN125 check valve 2 at the horizontal pipe. In order to prevent the check valve 2 from being damaged, a DN125 flanged DN4 bypass was connected in parallel. Because the flanged DN125 flow meter 3 is large, if either the bypass valve 1 or the check valve 2 is removed, the distance is not enough to install the flow meter 3. Therefore, the site needs to be modified.

[0031] like Figure 1 As shown, this application provides a flow monitoring device for a liquefied gas station's diffuser valve. The monitoring device includes: a main line and a bypass branch line, a bypass valve 1, a check valve 2, and a power flow meter 3. A bypass valve 1 installation position is provided on the bypass branch line; a check valve 2 installation position is provided on the main line, and a power flow meter 3 is also provided on the main line. An elbow 5 is installed at the inlet flange 4 of the check valve 2, and the outlet flange 4 is blocked with a blind flange.

[0032] A blind flange is used to block the inlet flange 4 of the bypass valve 1, and an elbow 5 is connected to the outlet flange 4 of the bypass valve 1.

[0033] Furthermore, the check valve 2 is installed above the corresponding position on the main line.

[0034] Furthermore, the bypass valve 1 is installed above the corresponding position of the bypass branch.

[0035] Furthermore, a power flow meter 3 is installed on the pipeline where the check valve 2 and the bypass valve 1 converge for measurement.

[0036] In a preferred embodiment of this application, the flow meter 3 is a battery-powered flow meter 3.

[0037] To reduce time and labor costs and minimize the use of power cords, a battery-powered flow meter 3 is used, which only requires batteries for power supply, thus reducing costs associated with power wiring.

[0038] like Figure 2 , Figure 3 As shown, due to the prohibition of hot work on site, a new flow path was created by modifying the piping at the flange connection, using a combination of elbows, flanges, and pipes. It was found on site that the original bypass valve and check valve were only spaced enough to install one flanged elbow. Therefore, the bypass valve and check valve were removed. An elbow was installed at the check valve's inlet flange, and a blind flange was used to block the outlet flange. Similarly, a blind flange was used to block the bypass valve's inlet flange, and an elbow was connected to its outlet flange. Then, a new check valve and bypass valve were installed above the original check valve inlet and bypass valve outlet. A flow meter was then installed on the pipe where the check valve and bypass valve converged for measurement.

[0039] The above description of the embodiments is provided to enable those skilled in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the embodiments described herein, and any improvements and modifications made without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A flow monitoring device for a liquefied gas station's diffuser valve, characterized in that, The monitoring device includes: a main road and a bypass branch, a bypass valve, a check valve, and a flow meter. A bypass valve installation position is provided on the bypass branch; a check valve installation position is provided on the main road, and a power flow meter is also provided on the main road. An elbow is installed at the inlet flange of the check valve, and a first blind flange is used to block the outlet flange. A second blind flange is used to block the inlet flange of the bypass valve, and an elbow is connected to the outlet flange of the bypass valve.

2. The liquefied gas station diffuser valve flow monitoring device according to claim 1, characterized in that, The check valve is installed above the corresponding position on the main road.

3. The liquefied gas station diffuser valve flow monitoring device according to claim 1, characterized in that, The bypass valve is installed above the corresponding position of the bypass branch.

4. A flow monitoring device for a liquefied gas station's diffuser valve according to any one of claims 1 to 3, characterized in that, A flow meter is installed in the pipeline where the check valve and bypass valve converge for measurement.

5. The liquefied gas station diffuser valve flow monitoring device according to claim 4, characterized in that, The flow meter is a battery-powered flow meter.

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