Intelligent safety control device for gas pipe network

Abstract

The utility model discloses a kind of gas pipe network intelligent safety control equipment, comprising: gas pipe network intelligent safety control equipment, comprising: flow measurement module and cut-off control module;Flow measurement module includes gas flowmeter, filter and check valve;Cut-off control module includes first electric ball valve, second electric ball valve and steel plastic conversion pipe fitting;One end of gas flowmeter is connected filter through straight-through pipe fitting, the other end is connected check valve through straight-through pipe fitting;The front end of filter is equipped with the gas intake port that is communicated with gas source, the rear end of check valve is equipped with gas outlet;Gas intake port and gas outlet each are equipped with a steel plastic conversion pipe fitting at place;First electric ball valve is installed between steel plastic conversion pipe fitting and filter, second electric ball valve is installed between steel plastic conversion pipe fitting and check valve;Flow measurement module is combined with cut-off control module, and constitute a U-shaped structure in space.

Description

Technical Field

[0001] This utility model relates to a gas pipeline network control device, and more particularly to a gas pipeline network intelligent safety control device. Background Technology

[0002] As a clean energy source, natural gas is being used on an ever-expanding scale, making the safe and efficient operation of gas pipeline networks crucial. Current gas pipeline systems generally suffer from the following technical deficiencies: 1. Urban gas pipeline networks are generally assembled on-site from steel valves, fittings, and instruments procured in a decentralized manner, lacking standardized and integrated complete sets of equipment. This non-integrated, decentralized implementation method is highly dependent on the technical skills of construction personnel, and the complex procedures during on-site assembly lead to low installation efficiency; at the same time, the assembly of multiple components results in numerous interfaces and weld points, increasing the risk of leakage. 2. Gas flow detection is subject to interference from impurities in the medium and the influence of reverse flow caused by pressure fluctuations, resulting in low measurement accuracy and poor data stability. Furthermore, the existing system requires a complete gas shutdown when maintenance or component replacement, which seriously affects the normal gas supply to downstream users, resulting in high maintenance costs and poor operational flexibility.

[0003] Therefore, it is necessary to provide an intelligent safety control device for gas pipeline networks to solve the above problems. Utility Model Content

[0004] In view of this, the present invention aims to propose an intelligent safety control device for gas pipeline networks to solve the problems of low installation efficiency and high risk of leakage caused by the lack of standardized and integrated complete sets of equipment in the existing technology; as well as the problems of low metering accuracy and poor operational reliability caused by interference from media impurities and reverse flow of fluid.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A smart safety control device for gas pipeline networks includes: a flow measurement module and a shut-off control module; the flow measurement module includes a gas flow meter, a filter, and a check valve; the shut-off control module includes a first electric ball valve, a second electric ball valve, and a steel-plastic conversion fitting.

[0006] One end of the gas flow meter is connected to a filter via a straight pipe fitting, and the other end is connected to a check valve via a straight pipe fitting; the front end of the filter is provided with a gas inlet that communicates with the gas source, and the rear end of the check valve is provided with a gas outlet.

[0007] A steel-plastic conversion pipe fitting is provided at both the gas inlet and the gas outlet; the first electric ball valve is installed between the steel-plastic conversion pipe fitting and the filter, and the second electric ball valve is installed between the steel-plastic conversion pipe fitting and the check valve.

[0008] The flow measurement module and the cut-off control module are combined to form a U-shaped structure in space.

[0009] This utility model's intelligent safety control device for gas pipeline networks integrates a flow measurement module and a cut-off control module, arranged in a U-shaped structure, to achieve the following two objectives: 1. By prefabricating the U-shaped structure into complete modules and completing all internal connections and tests in the factory, during on-site construction, installers only need to connect the module inlet and outlet to the main pipeline through steel-plastic conversion fittings. This completely eliminates the complex process of assembling, aligning, and welding multiple individual parts on-site, significantly improving construction efficiency and project quality consistency, while reducing the risk of leakage caused by on-site operations. In actual gas pipeline projects, especially in valve wells where metering and pressure regulating equipment is installed, the pre-cast concrete trenches or installation spaces are usually U-shaped. Therefore, designing the equipment itself as a U-shaped structure not only provides stable and sufficiently long straight pipe sections for the front and rear ends of the gas flow meter, effectively eliminating fluid turbulence and vortices and ensuring metering accuracy, but also matches the existing standardized installation environment.

[0010] 2. It can measure gas flow more accurately; by filtering contaminants through the filter and the one-way backflow prevention of the check valve, the flow rate stability and measurement accuracy are effectively improved, the damage of impurities to the gas flow meter is reduced, the impact of gas backflow on the gas flow meter is prevented, and the safety hazards of backflow are avoided; by controlling the gas source on and off and isolating upstream risks through the first electric ball valve, and isolating user-end abnormalities and preventing medium backflow through the second electric ball valve, bidirectional rapid cut-off of flow is achieved, further ensuring the pressure stability and system safety of the metering process.

[0011] As a preferred technical solution: The intelligent safety control device for gas pipelines described above further includes a first manual ball valve and a second manual ball valve. The first and second manual ball valves are used to manually cut off the gas flow path during system maintenance or emergencies. The first manual ball valve is installed between the steel-plastic conversion fitting and the first electric ball valve, and the second manual ball valve is installed between the steel-plastic conversion fitting and the second electric ball valve. When the device needs maintenance or replacement, the first and second manual ball valves can mechanically isolate the upstream and downstream pipelines respectively. Specifically, the first manual ball valve can be used to isolate the upstream gas source to ensure safe operation at the gas inlet end, and the second manual ball valve can be used to isolate the downstream user pipeline network to prevent reverse flow of the medium during maintenance.

[0012] The intelligent safety control device for gas pipelines described above also includes a bypass pipe, which is connected in parallel with the pipeline where the flow measurement module is located. One end of the bypass pipe is connected to a tee connector at the gas inlet, and the other end is connected to a tee connector at the gas outlet. A bypass ball valve is installed on the bypass pipe to switch the flow path when the main pipeline equipment is under maintenance or malfunctions, so as to replace, repair, or clean the main pipeline equipment such as gas flow meters and filters without stopping the downstream gas supply.

[0013] As described above, the intelligent safety control device for gas pipeline networks includes a pressure gauge and a pressure transmitter at the tee joint. The pressure gauge displays the pipeline pressure, providing intuitive visual readings for equipment commissioning and inspection; the pressure transmitter converts signals, enabling remote continuous pressure monitoring and data recording. Together, they form a dual local and remote pressure monitoring system, providing reliable data support for system operation status assessment and fault early warning.

[0014] The intelligent safety control device for gas pipeline networks described above also includes an explosion-proof junction box for remote monitoring. The explosion-proof junction box is externally connected to a straight-through pipe between the filter and the gas flow meter. The explosion-proof junction box can communicate with the pressure transmitter and gas flow meter, and through built-in protocol conversion and 5G wireless communication, it enables real-time remote transmission and cloud storage of equipment operation data, providing decision support for the precise scheduling and maintenance of the gas pipeline network.

[0015] As described above, in a gas pipeline intelligent safety control device, a flange sealing gasket is provided at the connection between the steel-plastic conversion fitting and the first manual ball valve and the second manual ball valve. This design effectively ensures the sealing reliability of the metal-plastic conversion interface, prevents gas leakage, and accommodates the thermal expansion and contraction of the pipeline.

[0016] As described above, in an intelligent safety control device for gas pipeline networks, the filter and the check valve are either elbows or straight sections. This design allows for flexible adaptation to different pipeline layouts, reduces the number of pipe fittings required for installation, and improves system integration and ease of assembly and disassembly.

[0017] As described above, in a smart safety control device for gas pipeline networks, the outer surfaces of the housings of the straight-through pipe fitting, the filter, the gas flow meter, and the check valve are provided with corrosion-resistant coatings. These corrosion-resistant coatings effectively prevent corrosive media in the environment from directly contacting the metal housing, significantly reducing the corrosion rate of the housing material.

[0018] As described above, an intelligent safety control device for gas pipeline networks includes valve seat sealing rings installed in the channels of the first electric ball valve, the second electric ball valve, the first manual ball valve, and the second manual ball valve. A fireproof protective sleeve is provided on the valve seat sealing ring. The fireproof protective sleeve effectively prevents the sealing material from failing under high-temperature conditions during a fire, ensuring that the valves maintain a reliable seal even under extreme operating conditions, significantly improving the safety of the gas pipeline network.

[0019] The above technical solution is only one feasible technical solution of this utility model. The protection scope of this utility model is not limited to this. Those skilled in the art can reasonably adjust the specific design according to actual needs. Attached Figure Description

[0020] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein: Figure 1 This is an exemplary structural diagram of the intelligent safety control device for gas pipeline networks in this utility model; Figure 2 This is a schematic diagram of data signal transmission in the explosion-proof junction box of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Steel-plastic conversion fitting; 2. First manual ball valve; 3. Tee connector; 4. First electric ball valve; 5. Filter; 6. Straight-through fitting; 7. Gas flow meter; 8. Check valve; 9. Bypass ball valve; 10. Explosion-proof junction box; 11. Pressure gauge; 12. Pressure transmitter; 13. Flange gasket; 14. Second electric ball valve; 15. Second manual ball valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0023] like Figure 1As shown, the intelligent safety control equipment for gas pipeline networks includes: a flow measurement module and a cut-off control module; the flow measurement module includes a gas flow meter 7, a filter 5, and a check valve 8; the cut-off control module includes a first electric ball valve 4, a second electric ball valve 14, and a steel-plastic conversion fitting 1; one end of the gas flow meter 7 is connected to the filter 5 through a straight fitting 6, and the other end is connected to the check valve 8 through a straight fitting 6; the front end of the filter 5 is provided with a gas inlet communicating with the gas source, and the rear end of the check valve is provided with a gas outlet; a steel-plastic conversion fitting 1 is provided at both the gas inlet and the gas outlet; the first electric ball valve 4 is installed between the steel-plastic conversion fitting 1 and the filter 5, and the second electric ball valve 14 is installed between the steel-plastic conversion fitting 1 and the check valve 8; the flow measurement module and the cut-off control module are combined to form a U-shaped structure in space.

[0024] The flow measurement module is used to accurately measure the gas flow rate and ensure measurement stability. In this embodiment, the flow measurement module includes: a gas flow meter 7, a filter 5, and a check valve 8.

[0025] Gas flow meter 7 is a component used to directly measure the flow rate of gas; filter 5 is used to filter contaminants in gas; check valve 8 is a component used to prevent gas backflow.

[0026] The shut-off control module is used to remotely control the flow of gas. In this embodiment, the shut-off control module includes a first electric ball valve 4, a second electric ball valve 14, and a steel-plastic conversion fitting 1.

[0027] Electric ball valves are safety actuators used for remote control of gas supply and emergency shut-off. In this embodiment, two electric ball valves are provided. The first electric ball valve 4, installed between the steel-plastic conversion pipe fitting 1 and the filter 5, is used to control the gas supply and isolate the upstream gas source risk. The second electric ball valve 14, installed between the steel-plastic conversion pipe fitting 1 and the check valve 8, is used to isolate user-end anomalies and prevent backflow impact. The two work together to achieve bidirectional safety isolation and intelligent flow control of the pipeline network.

[0028] Among them, user-end anomaly refers to the situation where a safety accident such as gas leakage, pipeline rupture, sudden pressure drop or equipment failure occurs at the downstream user end. In this case, the second electric ball valve 14 can immediately receive the control signal and automatically shut off, thereby completely isolating the dangerous situation at the user end from the upstream.

[0029] The steel-plastic transition fitting 1 is a transition joint used to achieve a reliable connection and ensure sealing between a metal pipe and a polyethylene plastic pipe. In this embodiment, the metal end of the steel-plastic transition fitting 1 is connected to the metal interface of the equipment's inlet and outlet, and the plastic end is heat-fused or clamped to the buried PE pipe, forming a corrosion-resistant and settlement-resistant sealed transition structure.

[0030] In this embodiment, the U-shaped device is prefabricated as a complete module in the factory, and all internal connections and tests have been completed. During on-site construction, installers only need to connect the inlet and outlet of the U-shaped module to the main pipeline via the steel-plastic conversion fitting 1, eliminating the complex process of assembling, aligning, and welding multiple individual parts on-site. When the intelligent safety control equipment for the gas pipeline is in normal use, the gas source enters through the steel-plastic conversion fitting 1 at the gas inlet, and the first electric ball valve 4 controls the gas inlet flow. After being filtered by the filter 5, the filtered clean gas is connected to the gas flow meter 7 via the straight fitting 6 to measure the flow rate. Then, it passes through the check valve 8 via the straight fitting 6, and the second electric ball valve 14 controls the gas outlet flow and isolates downstream anomalies. Finally, it flows out through the steel-plastic conversion fitting 1 at the outlet to connect to the next-level plastic pipeline.

[0031] In this embodiment, the coordinated setup of the flow measurement module and the cut-off control module enables accurate measurement of gas flow. By filtering contaminants through the filter 5 and the one-way backflow prevention of the check valve 8, the flow rate stability and measurement accuracy are effectively improved, the damage of impurities to the gas flow meter 7 is reduced, the impact of gas backflow on the gas flow meter 7 is prevented, and the safety hazards of backflow are avoided. Furthermore, integrating the flow measurement module and the cut-off control module into the same device can effectively solve the problems of multiple sealing points and high leakage risks caused by the scattered installation of various components in traditional non-integrated equipment.

[0032] Furthermore, it also includes a first manual ball valve 2 and a second manual ball valve 15; the first manual ball valve 2 and the second manual ball valve 15 are used to manually cut off the gas flow path during system maintenance or emergency; the first manual ball valve 2 is installed between the steel-plastic conversion fitting 1 and the first electric ball valve 4, and the second manual ball valve 15 is installed between the steel-plastic conversion fitting 1 and the second electric ball valve 14.

[0033] In this embodiment, the first manual ball valve 2 and the second manual ball valve 15 mechanically isolate the upstream and downstream pipelines when the equipment needs to be repaired or replaced. The first manual ball valve 2 can be used to isolate the upstream gas source to ensure the safety of operation at the gas inlet end, and the second manual ball valve 15 can be used to isolate the downstream user end to prevent the medium from flowing backward during maintenance.

[0034] Furthermore, it also includes a bypass pipe, which is connected in parallel with the pipe where the flow measurement module is located; one end of the bypass pipe is connected to a tee connector 3 at the gas inlet end, and the other end is connected to a tee connector 3 at the gas outlet end; a bypass ball valve 9 is installed on the bypass pipe.

[0035] The bypass pipeline is a backup flow path used to ensure uninterrupted gas supply for maintenance and emergency gas supply of the equipment; the bypass ball valve 9 is an actuator that controls the opening and closing of the bypass pipeline to achieve uninterrupted gas switching and emergency flow path switching.

[0036] In this embodiment, when the equipment is running normally, the bypass ball valve 9 is closed, and the gas flows along the conventional path. When the equipment on the main pipeline where the flow measurement module is located needs maintenance, malfunctions, or needs calibration, the bypass ball valve 9 is opened, and the gas is transported through the bypass pipeline, bypassing the equipment that needs maintenance. This allows maintenance personnel to safely and conveniently inspect, repair, and replace the main pipeline equipment without interrupting gas supply, ensuring that users' normal gas use is not affected and improving the flexibility of maintenance.

[0037] In this embodiment, a pressure gauge 11 and a pressure transmitter 12 are provided at the three-way connector 3.

[0038] Pressure gauge 11 is a mechanical or digital local indicating instrument used to display pipeline pressure values; pressure transmitter 12 refers to a sensing and transmitting unit that converts pressure signals into standard electrical signals and transmits them remotely to the control system. The two together constitute a dual local and remote pressure monitoring system, providing real-time status monitoring and safety data support for equipment operation.

[0039] In this embodiment, an explosion-proof junction box 10 for remote monitoring is also included. The explosion-proof junction box 10 is externally connected to the straight pipe 6 between the filter 5 and the gas flow meter 7.

[0040] The explosion-proof junction box 10 is a component used to receive and transmit various data signals during the operation of intelligent safety control equipment for gas pipeline networks. For example... Figure 2 As shown, Figure 2 This is a schematic diagram of data signal transmission in an explosion-proof junction box. In this embodiment, the data collected by each device in the intelligent safety control equipment for the gas pipeline network is transmitted to the explosion-proof junction box 10 in different signal forms. After the explosion-proof junction box 10 summarizes and converts these signals, it sends the data to the Internet of Things management platform through the 5G communication network to realize remote monitoring of the operating status of the gas pipeline network.

[0041] For example, the explosion-proof junction box 10 is connected to a pressure transmitter 12 with a pressure range of 0~0.6MPa and an accuracy class of 0.25 via a 4~20mA signal transmission method. The pressure transmitter transmits the detected pressure signal to the explosion-proof junction box 10 in the form of a 4~20mA current signal. As another example, a gas flow meter 7 with an accuracy class of 1.0 is connected via RS485 communication. The gas flow meter 7 transmits the flow data to the explosion-proof junction box 10 through the RS485 interface.

[0042] In this embodiment, a flange sealing gasket 13 is provided at the connection between the steel-plastic conversion pipe fitting 1 and the first manual ball valve 2 and the second manual ball valve 15.

[0043] In this embodiment, the filter 5 and the check valve 8 are either elbows or straight. The optional elbow or straight shape of the filter 5 and check valve 8 allows for flexible structural adaptation to different pipeline layouts, reducing the need for additional pipe fittings and improving system integration and ease of installation.

[0044] In this embodiment, the outer surfaces of the housings of the straight pipe 6, filter 5, gas flow meter 7, and check valve 8 are provided with corrosion-resistant coatings.

[0045] In this embodiment, valve seat sealing rings are provided in the channels of the first electric ball valve 4, the second electric ball valve 14, the first manual ball valve 2, and the second manual ball valve 15, and fireproof protective sleeves are provided on the valve seat sealing rings.

[0046] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. Intelligent safety control equipment for gas pipeline networks, characterized in that, include: The flow measurement module includes a gas flow meter (7), a filter (5), and a check valve (8); the cut-off control module includes a first electric ball valve (4), a second electric ball valve (14), and a steel-plastic conversion fitting (1). One end of the gas flow meter (7) is connected to the filter (5) through a straight pipe fitting (6), and the other end is connected to the check valve (8) through a straight pipe fitting (6); the front end of the filter (5) is provided with a gas inlet that is connected to the gas source, and the rear end of the check valve is provided with a gas outlet. A steel-plastic conversion pipe fitting (1) is provided at both the gas inlet and the gas outlet; the first electric ball valve (4) is installed between the steel-plastic conversion pipe fitting (1) and the filter (5), and the second electric ball valve (14) is installed between the steel-plastic conversion pipe fitting (1) and the check valve (8); The flow measurement module and the cut-off control module are combined to form a U-shaped structure in space.

2. The intelligent safety control device for gas pipeline networks according to claim 1, characterized in that, It also includes a first manual ball valve (2) and a second manual ball valve (15); the first manual ball valve (2) and the second manual ball valve (15) are used to manually cut off the gas flow path in case of system maintenance or emergency. The first manual ball valve (2) is installed between the steel-plastic conversion fitting (1) and the first electric ball valve (4), and the second manual ball valve (15) is installed between the steel-plastic conversion fitting (1) and the second electric ball valve (14).

3. The intelligent safety control device for gas pipeline networks according to claim 1, characterized in that, It also includes a bypass pipe, which is connected in parallel with the pipe where the flow measurement module is located; One end of the bypass pipe is connected to a three-way connector (3) at the gas inlet end, and the other end is connected to a three-way connector (3) at the gas outlet end; a bypass ball valve (9) is installed on the bypass pipe.

4. The intelligent safety control device for gas pipeline networks according to claim 3, characterized in that, A pressure gauge (11) and a pressure transmitter (12) are provided at the tee joint (3).

5. The intelligent safety control device for gas pipeline networks according to claim 1, characterized in that, It also includes an explosion-proof junction box (10) for signal transmission, which is externally connected to a straight pipe (6) between the filter (5) and the gas flow meter (7).

6. The intelligent safety control device for gas pipeline networks according to claim 2, characterized in that, A flange gasket (13) is provided at the connection between the steel-plastic conversion pipe fitting (1) and the first manual ball valve (2) and the second manual ball valve (15).

7. The intelligent safety control device for gas pipeline networks according to claim 1, characterized in that, The filter (5) and the check valve (8) are either elbows or straight.

8. The intelligent safety control device for gas pipeline networks according to claim 1, characterized in that, The outer surfaces of the housings of the straight pipe fitting (6), the filter (5), the gas flow meter (7), and the check valve (8) are provided with corrosion-resistant coatings.

9. The intelligent safety control device for gas pipeline networks according to claim 1, characterized in that, The first electric ball valve (4), the second electric ball valve (14), the first manual ball valve (2), and the second manual ball valve (15) are provided with valve seat sealing rings, and the valve seat sealing rings are provided with fireproof protective sleeves.

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