A pressure vessel non-relief replacement metering device

Abstract

A kind of pressure vessel does not replace gauge device with pressure relief.The guide vane cannot be reliably cut off water source after pressure relief of pressure vessel, in order to prevent the slow rotation of unit damage thrust bearing, need to close unit water inlet maintenance gate and cut off water source, need to spend a lot of time to close water inlet maintenance gate, greatly reduce work efficiency.The utility model discloses a support plate, first valve and multiple gauges, the support plate is welded with distributor and is fixed on the outer wall of pressure vessel with flange respectively, the input of first valve is connected with the connecting pipeline on flange, the output is connected with the distributor input pipeline of distributor, the output of multiple gauges is connected with the valve output pipeline of second valve, the input of second valve is connected with the distributor output pipeline of distributor.The utility model is used for pressure vessel not to replace gauge with pressure relief.

Description

Technical Field

[0001] This utility model relates to a meter replacement device, specifically a meter replacement device for a pressure vessel without depressurization. Background Technology

[0002] Pressure vessels are one of the most critical core components in the speed control system of hydropower plants. When the turbine generator unit is started, it mainly provides stable, reliable and sufficient pressure energy to the speed control system. When the turbine generator unit is stopped, the pressure energy ultimately closes the guide vanes, thus cutting off the water supply. Pressure vessels are typically equipped with pressure switches, pressure sensors, and mechanical pressure gauges to monitor pressure and control the operation of the pressure pump to maintain pressure. According to regulations, mechanical pressure gauges on pressure vessels are subject to mandatory inspection every six months. Inspecting these gauges requires their removal. Furthermore, pressure switches and pressure sensors on pressure vessels often experience value drift over time and must also be removed and re-inspected. Because pressure vessels operate at high pressures, some reaching 6.3 MPa or even higher, removing gauges without depressurizing can easily cause personal injury and equipment damage. Therefore, depressurizing the pressure vessel and replacing the gauges is generally the preferred method. After depressurization, the guide vanes lose pressure energy and cannot reliably cut off the water supply. To prevent the unit from slowly rotating and damaging the thrust bearings, the unit's inlet maintenance gate must be closed to cut off the water supply. This process takes considerable time and significantly reduces work efficiency. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a pressure vessel gauge replacement device that does not depressurize, in order to avoid personal injury and equipment damage accidents, reduce the intensity of personnel work, and improve work efficiency.

[0004] The above objectives are achieved through the following technical solutions: A pressure vessel pressure vessel gauge replacement device without depressurization comprises: a support plate, a first valve, and multiple gauges. The support plate is welded to a distributor and fixed to the outer wall of the pressure vessel along with a flange. The inlet of the first valve is connected to a connecting pipe on the flange, and the outlet is connected to the distributor inlet pipe of the distributor. The outlets of the multiple gauges are connected to the valve outlet pipe of a second valve, and the inlet of the second valve is connected to the distributor outlet pipe of the distributor.

[0005] The aforementioned pressure vessel non-depressurization gauge replacement device, wherein the first valve is a welded angle valve.

[0006] The pressure vessel non-depressurization gauge replacement device is described above, wherein the second valve is a needle valve with venting function. Beneficial effects

[0007] 1. This utility model features a simple structure and high reliability. All pipe joints are threaded unions, facilitating equipment removal and replacement, as well as adjustment of meter direction. The weight of the meter and the vented needle valve is vertically transferred to the distributor. After welding, the support plate and flange are fixed to the outer wall of the pressure vessel, ensuring reliable and stable support for the meter. Before replacing the meter, the pressure medium between the welded angle valve and the meter can be removed through the vented needle valve. During the replacement process, the welded angle valve is unaffected by the external force of meter removal, ensuring reliable isolation of the pressure medium. This device has a simple structure and high reliability, enabling meter replacement without depressurizing the pressure vessel. It effectively prevents personal injury and equipment damage accidents, while significantly reducing the workflow of depressurizing the pressure vessel for meter replacement, thus improving production efficiency and making it suitable for widespread use. Attached Figure Description

[0008] Fig. 1 This is the front view of the present invention; Fig. 2 This is a side view of the present invention; In the diagram: 1. Support plate; 2. Meter; 3. Second valve; 4. Distributor; 5. First valve; 6. Flange; 8. Threaded union; 9. Pressure vessel outer wall; 3.1. First handwheel; 3.2. Second handwheel; 5.1. Third handwheel; 7.1. Connecting pipeline; 7.2. Distributor input pipeline; 7.3. Distributor output pipeline; 7.4. Valve output pipeline. Detailed Implementation

[0009] Reference Figs. 1-2 A pressure vessel non-depressurization gauge replacement device comprises: a support plate 1, a first valve 5, and multiple gauges 2. The support plate is welded to a distributor 4 and fixed to the outer wall 9 of the pressure vessel along with a flange 6. The inlet of the first valve is connected to a connecting pipe 7.1 on the flange, and the outlet is connected to the distributor inlet pipe 7.2 of the distributor. The outlets of the multiple gauges are connected to the valve outlet pipe 7.4 of the second valve 3, and the inlet of the second valve is connected to the distributor outlet pipe 7.3 of the distributor.

[0010] The aforementioned pressure vessel non-depressurization gauge replacement device, wherein the first valve is a welded angle valve.

[0011] The pressure vessel non-depressurization gauge replacement device is described above, wherein the second valve is a needle valve with venting function.

[0012] When the pressure vessel is operating normally, the third handwheel 5.1 and the first handwheel 3.1 are open, and the second handwheel 3.2 is closed. The pressure medium passes through the flange → welded angle valve → distributor → vented needle valve to the gauge. When replacing the gauge under pressure, first manually close the third handwheel of the welded angle valve to cut off the pressure medium, then open the second handwheel of the vented needle valve to remove the pressure medium between the welded angle valve and the gauge. After confirming that the gauge pressure is "0", use a wrench to loosen the threaded union below the gauge to replace the gauge, thus realizing the function of replacing the gauge without depressurizing the pressure vessel.

[0013] The welded angle valve in this device is reliably fixed to the outer wall of the pressure vessel via a support plate and flange. During gauge replacement, the external force applied while loosening the threaded union 8 will not affect the welded angle valve, ensuring its reliable shut-off of the pressure medium and guaranteeing worker safety. The weight of the gauge and the vented needle valve is transferred to the distributor, which, through the support plate, ultimately transmits the weight to the outer wall of the pressure vessel, significantly improving equipment safety. All pipeline joints are threaded unions, facilitating equipment removal and replacement, and gauge direction adjustment. This device features a simple structure, high stability, and the ability to replace gauges without depressurizing the pressure vessel, effectively preventing personal injury and equipment damage accidents. It also greatly reduces the workload associated with depressurization during gauge replacement, improving production efficiency and making it suitable for widespread use.

[0014] The weight of the meter and the vented needle valve is vertically transferred to the distributor. After the distributor is welded to the support plate, it is fixed to the outer wall of the pressure vessel along with the flange, ensuring reliable and stable support for the meter. Before replacing the meter, the pressure medium between the welded angle valve and the meter can be removed through the vented needle valve. During the replacement process, the welded angle valve is not affected by the external force of disassembling the meter, ensuring that the welded angle valve can reliably isolate the pressure medium.

Claims

1. A pressure vessel gauge replacement device without depressurization, characterized in that: Its components include: a support plate, a first valve, and multiple meters. The support plate is welded to the distributor and fixed to the outer wall of the pressure vessel along with the flange. The inlet of the first valve is connected to the connecting pipe on the flange, and the outlet is connected to the distributor inlet pipe of the distributor. The outlets of the multiple meters are connected to the valve outlet pipe of the second valve, and the inlet of the second valve is connected to the distributor outlet pipe of the distributor.

2. The pressure vessel non-relief gauge replacement device according to claim 1, characterized in that: The first valve is a welded angle valve.

3. The pressure vessel non-relief gauge replacement device according to claim 2, characterized in that: The second valve is a needle valve with venting.

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