Zero-leakage pressure reducing valve system
By designing a zero-leakage pressure reducing valve system, the problem of leakage in the rear end of the pressure reducing valve in the standard gas system is solved, the system is automated control and efficient leakage detection are realized, and the production efficiency and system stability are improved.
Patent Information
- Application Number
- CN202422542069.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The rear end pipeline of the pressure reducing valve in the existing standard gas system is prone to leakage, resulting in complex and inconvenient leakage, affecting production efficiency, and the joints may be loose during on-site use and then leaking again.
A zero-leakage pressure reducing valve system is designed, including a cylinder pressure reducing valve, a shut-off solenoid valve, a bottom plate, a stainless steel sleeve joint and a stainless steel pipe. Through a compact structure and effective connection method, it ensures zero leakage in the gas circuit from the outlet of the cylinder pressure reducing valve to the solenoid valve inlet section. It adopts 316L stainless steel material and standard interface, and combines the control of the solenoid valve to achieve automatic control.
The overall zero leakage of the pressure reducing valve system is achieved, the leakage detection process is simplified, the production efficiency is improved, and the stability and reliability of the system during non-working hours are ensured.
Smart Images
Figure CN223165403U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gas leakage of a pressure reducing valve of a standard gas cylinder. Background Art
[0002] Existing standard gas is usually used manually and is only operated for a period of time. The leakage problem caused by joints and other accessories during use is not given much consideration. However, the automation and intelligentization of equipment require that the standard gas needs to become part of the system and needs to be kept open during non-working hours. This requires zero leakage in the rear-end pipeline of the pressure reducing valve.
[0003] The existing method is to check the back-end pipelines in sections for each system. Since the pipelines may be connected to several tees, joints, pressure transmitters and other accessories, the leak detection work is complicated and cannot guarantee on-site stability. In addition, the on-site standard gas cylinders need to be replaced regularly, and the replacement process is more likely to introduce new leaks.
[0004] Before each system leaves the factory, the rear-end pipeline of the pressure reducing valve needs to be pressure tested. Usually, it is connected to 0.3MPa pressure and left to stand for at least 24 hours without leakage. If there is a leak, soapy water needs to be used to find the leak point. The workload is large and complicated, which seriously affects production efficiency.
[0005] After a period of on-site use, the pipe joints may become loose, resulting in secondary air leakage problems. The same on-site troubleshooting process is inconvenient. Utility Model Content
[0006] In view of this, the utility model provides a zero-leakage pressure reducing valve system, comprising: a gas cylinder pressure reducing valve, a stop solenoid valve, a base plate, a first stainless steel ferrule joint, a stainless steel pipe, and a second stainless steel ferrule joint; the gas cylinder pressure reducing valve and the stop solenoid valve are fixed on the base plate; the outlet of the gas cylinder pressure reducing valve is connected to the first stainless steel ferrule joint; the two ends of the stainless steel pipe are respectively connected to the first stainless steel ferrule joint and the second stainless steel ferrule joint; the inlet of the stop solenoid valve is connected to the second stainless steel ferrule joint.
[0007] Furthermore, the inlet of the gas cylinder pressure reducing valve is provided with a G5 / 8 thread.
[0008] Furthermore, the inlet and outlet of the gas cylinder pressure reducing valve are respectively provided with pressure gauges.
[0009] Furthermore, the stainless steel tube is made of 316L stainless steel.
[0010] Furthermore, a protective cover is provided on the cut-off solenoid valve.
[0011] Furthermore, the cut-off solenoid valve and the protective cover are both provided with standard interfaces.
[0012] The system provided by the present utility model has a compact overall structure and zero pipeline leakage. Description of the Drawings
[0013] Figure 1 It is a schematic diagram of the zero - leakage pressure reducing valve system.
[0014] Among them, 1 is the gas cylinder pressure reducing valve, 2 is the globe solenoid valve, 3 is the bottom plate, 4 is the first stainless steel ferrule fitting, 5 is the stainless steel pipe, 6 is the second stainless steel ferrule fitting, 7 is the pressure gauge, 8 is the inlet of the gas cylinder pressure reducing valve, and 9 is the outlet of the solenoid valve. Detailed Implementation Modes
[0015] Embodiment
[0016] Standard gas: A standard substance used in the field of pollution source gas monitoring to calibrate analytical instruments. It is usually stored in gas cylinders, mainly with a capacity of 8L gas cylinders. The factory gas cylinder pressure is usually about 10MPa. When in use, an external pressure reducing valve is required to reduce the pressure to about 0.1 - 0.3MPa for use.
[0017] Solenoid valve: A valve body that relies on an electrical signal to control the on - off of the gas path. It is commonly used as a gas path on - off control unit in pollution source monitoring systems.
[0018] Aiming at the technical drawbacks of existing equipment, the zero - leakage pressure reducing valve system provided by the present utility model includes: a gas cylinder pressure reducing valve, a globe solenoid valve, a bottom plate, a first stainless steel ferrule fitting, a stainless steel pipe, and a second stainless steel ferrule fitting.
[0019] The gas cylinder pressure reducing valve and the globe solenoid valve are fixed on the bottom plate.
[0020] The inlet of the gas cylinder pressure reducing valve is connected to the gas cylinder interface, usually G5 / 8 thread. The outlet of the gas cylinder pressure reducing valve is connected to the first stainless steel ferrule fitting; the thread is coated with sealant; pressure gauges are respectively provided at the inlet and outlet of the gas cylinder pressure reducing valve to detect the gas pressure at the inlet and outlet.
[0021] Both ends of the stainless steel pipe are respectively connected to the first stainless steel ferrule fitting and the second stainless steel ferrule fitting; the stainless steel pipe is made of 316L stainless steel.
[0022] The inlet of the globe solenoid valve is connected to the second stainless steel ferrule fitting, and the outlet of the globe solenoid valve is connected to the gas - using equipment.
[0023] The globe solenoid valve has a protective cover, with an overall miniaturized structure, saving space and being convenient to use; both the globe solenoid valve and the protective cover have standard interfaces and external leads, facilitating the access of control signals to control the on - off of the solenoid valve.
[0024] The gas cylinder pressure reducing valve and the stop solenoid valve body provided by the utility model are zero-leakage products by themselves. A stop valve is installed at the outlet end of the pressure reducing valve. During factory production, it only needs to ensure zero leakage of the gas path from the outlet of the gas cylinder pressure reducing valve to the inlet of the solenoid valve. The overall compact structure and effective connection method can fully ensure zero leakage of this section of pipeline. Only factory leak detection needs to be carried out on it. The specific leak detection process is as follows: Connect the overall joint to the gas cylinder. Open the gas cylinder valve. The pressure gauge at the inlet of the gas cylinder pressure reducing valve indicates the gas pressure of the gas cylinder. A new gas cylinder is usually about 10 MPa. Rotate the pressure reducing valve clockwise so that the pressure gauge at the outlet of the pressure reducing valve indicates 0.3 MPa. At this time, rotate the pressure reducing valve counterclockwise to the closed state so that 0.3 MPa of gas is trapped between the pressure reducing valve and the solenoid valve. Usually, the solenoid valve needs to be a normally closed valve, that is, the valve body is in the closed state when powered off. The valve group after pressure trapping can be left standing for 24 hours and then observe the pressure change of the trapped 0.3 MPa. If there is pressure decay, soapy water needs to be used to find the leak point in the pipeline.
Claims
1. Zero-leakage pressure reducing valve system, characterized by comprising: Gas cylinder pressure reducing valve, stop solenoid valve, bottom plate, first stainless steel ferrule fitting, stainless steel pipe, second stainless steel ferrule fitting; The gas cylinder pressure reducing valve and the stop solenoid valve are fixed on the bottom plate; The outlet of the gas cylinder pressure reducing valve is connected to the first stainless steel ferrule fitting; Both ends of the stainless steel pipe are respectively communicated with the first stainless steel ferrule fitting and the second stainless steel ferrule fitting; The inlet of the stop solenoid valve is communicated with the second stainless steel ferrule fitting.
2. The zero-leakage pressure reducing valve system according to claim 1, wherein The inlet of the gas cylinder pressure reducing valve is provided with a G5 / 8 thread.
3. The zero-leakage pressure reducing valve system according to claim 1, characterized in that, Pressure gauges are respectively provided at the inlet and outlet of the gas cylinder pressure reducing valve.
4. The zero-leakage pressure reducing valve system according to claim 1, characterized in that, The stainless steel pipe is made of 316L stainless steel.
5. The zero-leakage pressure reducing valve system according to claim 1, characterized in that, A protective cover is provided on the stop solenoid valve.
6. The zero-leakage pressure reducing valve system according to claim 1, characterized in that, Standard interfaces are provided on both the stop solenoid valve and the protective cover.