Intelligent management system for composite pipe type gas pipeline

Abstract

The invention belongs to the technical field of fuel gas utilization engineering, and particularly relates to an intelligent management system for fuel gas utilization of a multi-pipe type pipeline, in particular to an intelligent management system for fuel gas utilization of the multi-pipe type pipeline. The intelligent management system comprises an inner pipe, an outer pipe, a gate valve chamber, an extension pipe and an alarm system, the inner pipe is sleeved with the outer pipe to form a composite pipe type gas pipeline, gas circulates in the inner pipe, and a cavity is formed between the inner pipe and the outer pipe. Sluice valve chambers are additionally arranged on the gas pipeline at intervals, and electric control sluice valves are assembled in the sluice valve chambers; the outer pipe is connected with the gate valve chamber; one end of the extension pipe is connected with the outer pipe of the gate valve chamber or the air outlet end, and the other end of the extension pipe is guided into the air; and the alarm system is electrically connected with the electric control gate valve. The multi-pipe design is adopted, intelligent management of pipeline gas can be effectively achieved, and deflagration disasters caused by gas leakage can be effectively retarded in time; the safety of the human settlement environment is guaranteed, and the life and property loss caused by detonation due to gas leakage is reduced.

Description

Technical Field

[0001] The invention belongs to the field of gas utilization engineering technology, and specifically relates to a multi-pipe pipeline gas utilization intelligent management system. Background Art

[0002] With the development and progress of society, natural gas, as a green combustible gas, has entered thousands of households and enterprises and institutions through gas pipelines, and residents use it to boil water and cook. However, gas pipelines are prone to leakage due to disrepair or impact by external forces, which can easily cause major explosion accidents if they are not supervised.

[0003] Furthermore, there are many atypical natural gas leakage accidents every year, which cause varying degrees of injuries.

[0004] According to incomplete statistics, there are about 327 million gas users in China, of which about 238 million are pipeline natural gas users and about 53 million are liquefied gas users. The length of the gas pipeline network is 1.219 million kilometers, of which 1.206 million are natural gas pipelines, and more than 70,000 kilometers are old pipelines that have been in operation for more than 20 years. Many old pipelines and deep-buried pipelines are approaching their design lifespans, and aging and corrosion problems are serious, increasing the risk of gas leakage.

[0005] Furthermore, nowadays, various underground pipelines in cities are crisscrossed. Sometimes newly excavated pipelines will damage natural gas pipelines. If natural gas pipelines lack detection and alarm systems, serious consequences will occur.

[0006] To sum up, the current natural gas pipelines are seriously aging and lack self-detection and intelligent management functions. Summary of the invention

[0007] The technical problem to be solved by the present invention is: in view of the drawbacks of the above-mentioned natural gas pipelines, a double-pipe gas pipeline intelligent management system is specially designed, and its design idea is mainly to change the natural gas pipelines in densely populated urban areas from single pipes to double pipes; and equip them with intelligent detection systems.

[0008] The technical solution adopted by the present invention to solve its technical problems is a multi-pipe gas pipeline intelligent management system, which is characterized in that: the multi-pipe gas pipeline intelligent management system includes an inner pipe, an outer pipe, a gate valve chamber, an extension pipe, and an alarm system; the inner pipe is sleeved in the outer pipe to form a multi-pipe gas pipeline, the gas flows in the inner pipe, and a cavity is formed between the inner pipe and the outer pipe; a gate valve chamber is installed on the gas pipeline at intervals, and an electric-controlled gate valve is installed in the gate valve chamber; the outer pipe is connected to the gate valve chamber, and the inner pipe is connected to the electric-controlled gate valve; one end of the extension pipe is connected to the outer pipe of the gate valve chamber or the gas outlet end, and the other end is led to the air, and the alarm system is installed on the outside of the extension pipe; the alarm system is electrically connected to the electric-controlled gate valve.

[0009] As described above, the gate valve chamber is not connected to the outer tube of the air supply end, but is connected to the outer tube of the air outlet end; thus, the gate valve chamber is connected to the clamping cavity of the air outlet end, and is connected to the outside through the extension tube.

[0010] As mentioned above, the gate valve chamber is divided into a power chamber and a valve body chamber. The power chamber is equipped with an electric device, and the valve body of the electric-controlled gate valve is equipped in the valve body chamber. The power chamber and the valve body chamber are sealed and isolated.

[0011] As mentioned above, for the extension pipe of the underground gas pipeline, one end is buried underground, and the other end is led out of the ground and extends into the air; for the extension pipe of the vertical main gas pipeline of the building, it is extended from the upper end of the outer pipe of the main gas pipeline; the upper end of the extension pipe is equipped with a rain cap.

[0012] As mentioned above, the alarm system is installed on the upper part of the extension tube, the gas sensing probe of the alarm system is placed inside the extension tube, and the alarm system is equipped with a buzzer and a flash light; when the gas sensing probe senses that the gas density exceeds the standard, the buzzer of the alarm system will emit a harsh alarm sound, and the flash light will also flash to alarm, and at the same time the alarm system will close the electric control gate valve in the gate valve chamber to cut off the gas supply in the pipeline.

[0013] As mentioned above, the alarm system is interconnected with the remote control center of the gas management department through the Internet. When the alarm system sends out an audible and visual alarm, the alarm signal is transmitted to the control center at the same time. The management personnel of the control center will notify the emergency repair personnel through the location number of the alarm information and immediately rush to the scene for emergency repairs.

[0014] As mentioned above, the outside of the outer tube can be covered with a sensing wire, which is electrically connected to the alarm system. Once the sensing wire is impacted by external force, it will transmit the impact signal to the alarm system. The alarm system will emit an audible and visual alarm and simultaneously transmit the signal to the control center. The management personnel will immediately dispatch emergency repair personnel to the site for inspection and stop drilling or excavation and other acts that may damage the gas pipeline.

[0015] As mentioned above, the multi-pipe gas pipeline is introduced into the room, and a gas meter valve box is installed indoors; the gas meter valve box is equipped with a gas meter, a pre-meter shut-off valve and a post-meter electric shut-off valve; the inner pipe is connected to the pre-meter shut-off valve, the pre-meter shut-off valve is connected to the gas meter air inlet, the gas meter air outlet is connected to the post-meter electric shut-off valve, the post-meter electric shut-off valve is led out of the gas meter valve box through the gas pipe and connected to the gas stove; the gas meter valve box is connected to the outer pipe, the outer pipe is connected to the outer pipe of the main pipe; the electric shut-off valve is electrically connected to the indoor gas alarm; if the components in the gas meter valve box and the inner pipe leak, they will be introduced into the outer pipe of the outdoor main pipe through the outer pipe, and then dissipated into the air through the extension pipe of the main pipe, avoiding the accumulation of gas indoors and causing an explosion when encountering open flames.

[0016] As mentioned above, the original residential building gas pipeline is optimized and reconstructed by double pipe; the original residential building gas main pipeline is installed indoors, running from the first floor to the top floor. For this situation, the renovation method is adopted based on the household as a unit to avoid the risk of gas leakage; first, an outer pipe is installed outside the main pipeline, and the upper part of the outer pipe is connected to the extension pipe, which passes through the wall and leads to the outside; the branch pipeline is also equipped with an outer pipe to form a double-pipe gas pipeline, and a gas meter valve box is installed indoors; the gas meter valve box is equipped with a gas meter, a pre-meter shut-off valve and a post-meter electric shut-off valve ; The inner pipe of the branch pipeline is connected to the shut-off valve in front of the meter, the shut-off valve in front of the meter is connected to the air inlet of the gas meter, the air outlet of the gas meter is connected to the electric shut-off valve behind the meter, the electric shut-off valve behind the meter is connected to the gas meter valve box through the gas pipe and the gas stove; the gas meter valve box is connected to the outer pipe of the branch pipeline, the outer pipe of the branch pipeline is connected to the outer pipe of the main pipeline; the electric shut-off valve is electrically connected to the indoor gas alarm; if the components and inner pipe in the gas meter valve box leak, they will be led to the outside through the extension pipe and dissipated in the air, avoiding explosion caused by indoor accumulation and open flame.

[0017] As mentioned above, a gas sensing probe is installed in the gas meter valve box or inside the outer pipe of the indoor main pipeline, and the gas sensing probe is electrically connected to the indoor gas alarm; when the gas sensing probe senses that the gas in the gas meter valve box or inside the outer pipe of the main pipeline exceeds the standard, it will transmit the signal to the indoor gas alarm, and the indoor gas alarm will send out an audible and visual alarm, and actively cut off the electric shut-off valve behind the meter, and the householder will contact the gas maintenance personnel for inspection; if there is a gas leak in the indoor gas stove and its accessories, the indoor gas alarm will sense that the gas exceeds the standard, and it will also send out an audible and visual alarm and actively cut off the electric shut-off valve behind the meter; after using the gas stove, close the stove valve, and at the same time close the electric shut-off valve behind the meter through the manual switch on the indoor gas alarm; when using the gas stove, first open the electric shut-off valve behind the meter through the manual switch on the indoor gas alarm, and then open the stove valve to ignite; in this way, the risk of explosion caused by gas leakage is fundamentally eliminated.

[0018] The beneficial effects of the invention are: the invention adopts a double-pipe design, which can effectively realize intelligent management of pipeline gas, timely and effectively block the explosion disaster caused by gas leakage; ensure the safety of the human living environment, and reduce the loss of life and property caused by gas leakage and subsequent explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The invention will be further described below in conjunction with the accompanying drawings.

[0020] Attached Figure 1 It is a schematic diagram of the structure of the underground gas pipeline of the invention.

[0021] Attached Figure 2 It is a schematic diagram of the vertical gas pipeline structure of the invention.

[0022] Attached Figure 3It is a schematic diagram of the indoor gas pipeline structure of the invention.

[0023] Attached Figure 4 It is a schematic diagram of the old gas pipeline reconstruction structure of the invention.

[0024] In the figure, 1 inner pipe 2 outer pipe 3 gate valve chamber 31 power chamber 32 valve body chamber 4 extension pipe 5 alarm system 6 gas meter valve box 61 gas meter 62 pre-meter shut-off valve 63 post-meter electric shut-off valve 7 gas alarm 8 gas cooker 9 building 10 gas sensor probe. DETAILED DESCRIPTION

[0025] Now, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0026] like Figure 1 As shown, an implementation method of a multi-pipe gas pipeline intelligent management system in this embodiment; a multi-pipe gas pipeline intelligent management system includes an inner pipe 1, an outer pipe 2, a gate valve chamber 3, an extension pipe 4, and an alarm system 5; the inner pipe 1 is set in the outer pipe 2 to form a multi-pipe gas pipeline, the gas flows in the inner pipe 1, and a sandwich cavity is formed between the inner pipe 1 and the outer pipe 2; a gate valve chamber 3 is installed on the gas pipeline at a certain distance, and an electric control gate valve is installed in the gate valve chamber 3; the outer pipe 2 is connected to the gate valve chamber 3, and the inner pipe 1 is connected to the electric control gate valve; one end of the extension pipe 4 is connected to the gate valve chamber 3 or the outer pipe 2 at the gas outlet end, and the other end is guided to the air, and the outer side of the extension pipe 4 is equipped with an alarm system 5; the alarm system 5 is electrically connected to the electric control gate valve. The gate valve chamber 3 is not connected to the outer pipe 2 at the gas supply end, and the gate valve chamber 3 is connected to the outer pipe 2 at the gas outlet end; in this way, the gate valve chamber 3 is connected to the sandwich cavity at the gas outlet end, and is connected to the outside through the extension pipe 4. The gate valve chamber 3 is divided into a power chamber 31 and a valve body chamber 32. The power chamber 31 is equipped with an electric device, and the valve body of the electric gate valve is equipped in the valve body chamber 32. The power chamber 31 and the valve body chamber 32 are sealed and isolated. For the extension pipe 4 of the buried gas pipeline, one end is buried underground, and the other end is led out of the ground and extended into the air. The upper end of the extension pipe 4 is equipped with a rain cap. The alarm system 5 is installed on the upper part of the extension pipe 4, and the gas sensor probe of the alarm system 5 is placed inside the extension pipe 4. The alarm system 5 is equipped with a buzzer and a flashing light.

[0027] In this embodiment, if the inner tube 1 of the gas pipeline leaks, the gas cannot diffuse disorderly, but enters the cavity between the inner tube 1 and the outer tube 2. The pipeline gas is generally natural gas, which has a smaller specific gravity than air, so it will float up, and then it will be guided into the air through the extension tube 4. Because there is no fire source at high altitude, the derived natural gas will escape into the air and will not cause explosion. At the same time, when the gas sensor probe in the extension tube 4 senses that the gas density exceeds the standard, the buzzer of the alarm system 5 will emit a harsh alarm sound, and the flash light will also flash to alarm. At the same time, the alarm system 5 will close the electric control gate valve in the gate valve chamber 3 to cut off the gas supply in the pipeline. The alarm system 5 is interconnected with the remote control center of the gas management department through the Internet. When the alarm system 5 emits an audible and visual alarm, the alarm signal is transmitted to the control center at the same time. The management personnel of the control center will notify the emergency repair personnel through the location number of the alarm information and rush to the scene for emergency repair immediately; the safe operation of the buried gas pipeline is guaranteed to the maximum extent, and intelligent management is realized.

[0028] like Figure 2 As shown, an implementation method of a vertical double-pipe gas pipeline intelligent management system of this embodiment. For the extension pipe 4 of the vertical main gas pipeline of the building, it is extended at the upper end of the outer pipe 2 of the main gas pipeline; the upper part of the extension pipe 4 is equipped with an alarm system 5, and the upper end is equipped with a rain cap; each floor has a branch gas pipeline leading into the room, and a gate valve chamber 3 is set at the lower end of the vertical gas pipeline. The gate valve chamber 3 is equipped with an electric control gate valve, and the electric control gate valve is electrically connected to the alarm system 5; the double-pipe gas pipeline is vertically installed on the outer wall of the building 9.

[0029] The alarm system 5 can also be installed at the lower part of the outer tube 2 of the gas pipeline. The gas sensing probe must be installed in the extension tube 4. The alarm system 5 is electrically connected to the gas sensing probe.

[0030] In this embodiment, if the inner pipe 1 of the vertical gas pipeline leaks, the gas enters the cavity between the inner pipe 1 and the outer pipe 2. The pipeline gas is generally natural gas, which has a smaller specific gravity than air, so it will float up and be guided to the air through the extension pipe 4. Because there is no fire source at high altitude, the guided natural gas will escape into the air and will not cause explosion. At the same time, when the gas sensor probe in the extension pipe 4 senses that the gas density exceeds the standard, the buzzer of the alarm system 5 will emit a harsh alarm sound, and the flash light will also flash to alarm. At the same time, the alarm system 5 will close the electric control gate valve in the gate valve chamber 3 to cut off the gas supply in the pipeline. The alarm system 5 is interconnected with the remote control center of the gas management department through the Internet. When the alarm system emits an audible and visual alarm, the alarm signal is transmitted to the control center at the same time. The management personnel of the control center will notify the emergency repair personnel through the location number of the alarm information and immediately rush to the scene for emergency repair; the safe operation of the buried gas pipeline is guaranteed to the maximum extent, and intelligent management is realized.

[0031] like Figure 3 As shown, an indoor implementation method of a vertical double-pipe gas pipeline intelligent management system of this embodiment. The double-pipe gas pipeline is introduced into the room, and a gas meter valve box 6 is installed indoors; the gas meter valve box 6 is equipped with a gas meter 61, a pre-meter shut-off valve 62 and a post-meter electric shut-off valve 63; the inner pipe 1 is connected to the pre-meter shut-off valve 62, the pre-meter shut-off valve 62 is connected to the gas meter 61 air inlet, the gas meter 61 air outlet is connected to the post-meter electric shut-off valve 63, and the post-meter electric shut-off valve 63 is connected to the gas meter valve box 6 through the gas pipe to connect to the gas cooker 8; the gas meter valve box 6 is connected to the outer pipe 2, and the outer pipe 2 is connected to the outer pipe of the main pipeline; the post-meter electric shut-off valve 63 is electrically connected to the indoor gas alarm 7.

[0032] In this embodiment, if leakage occurs in the components in the gas meter valve box 6 and the inner tube 1, the leakage will be discharged into the outer tube 2 of the outdoor main pipeline through the outer tube 2, and then dissipated into the air through the extension tube 4 of the main pipeline, thereby avoiding the accumulation of gas indoors and causing an explosion when encountering open flames.

[0033] In this embodiment, if a gas leak occurs in the gas cooker 8 and its accessories, the indoor gas sensing probe 10 will transmit a signal to the indoor gas alarm 7, and the indoor gas alarm 7 will close the electric shut-off valve 63 behind the meter to ensure indoor safety; furthermore, when the gas cooker 8 is finished using, the electric shut-off valve 63 behind the meter can be closed by the manual switch on the indoor gas alarm 7 to make the room safer.

[0034] like Figure 4 As shown, this embodiment is an implementation method for renovating old gas pipelines of a vertical double-pipe gas pipeline intelligent management system. The invention aims at optimizing and reconstructing the original gas pipeline of the residential building by using a double pipe. The gas main pipeline of the original residential building is set indoors, running from the first floor to the top floor. For this situation, a renovation method based on households is adopted to avoid the risk of gas leakage. First, an outer pipe 2 is installed outside the main pipeline, and the upper part of the outer pipe 2 is connected to an extension pipe 4, which is led out of the wall to the outside. The branch pipeline is also equipped with an outer pipe 2 to form a double-pipe gas pipeline, and a gas meter valve box 6 is installed indoors. A gas meter 61, a pre-meter shut-off valve 62 and a post-meter electric shut-off valve 63 are installed in the gas meter valve box 6. The inner pipe 1 of the branch pipeline is connected to the pre-meter shut-off valve 62, the pre-meter shut-off valve 62 is connected to the air inlet of the gas meter 61, the air outlet of the gas meter 61 is connected to the post-meter electric shut-off valve 63, and the post-meter electric shut-off valve 63 is connected to the gas stove 8 through the gas pipe leading out of the gas meter valve box 6. The gas meter valve box 6 is connected to the branch pipeline outer pipe 2, and the branch pipeline outer pipe 2 is connected to the outer pipe of the main pipeline. The post-meter electric shut-off valve 63 is electrically connected to the indoor gas alarm 7. A gas sensing probe 10 is arranged inside the gas meter valve box 6 or inside the outer pipe of the indoor main pipeline, and the gas sensing probe 10 is electrically connected to the indoor gas alarm 7 .

[0035] In this embodiment, if the components and inner tube 1 in the gas meter valve box 6 leak, they will be led to the outside through the extension tube 4 and dissipated in the air, avoiding the explosion caused by the indoor accumulation of open flames. When the gas sensor probe 10 senses that the gas in the gas meter valve box 6 or the outer tube 2 of the main pipeline exceeds the standard, it will transmit the signal to the indoor gas alarm 7, and the indoor gas alarm 7 will send out an audible and visual alarm and actively cut off the electric shut-off valve 63 behind the meter. The householder will contact the gas maintenance personnel for inspection; if the indoor gas stove 8 and its accessories leak, the indoor gas alarm 7 will sense that the gas exceeds the standard, and it will also send out an audible and visual alarm and actively cut off the electric shut-off valve 63 behind the meter; after the gas stove 8 is used, the stove valve is closed, and the electric shut-off valve 63 behind the meter is closed by the manual switch on the indoor gas alarm 7; when the gas stove 8 is used, the electric shut-off valve 63 behind the meter is first opened by the manual switch on the indoor gas alarm 7, and then the stove valve is opened for ignition; in this way, the risk of explosion caused by gas leakage is fundamentally eliminated.

[0036] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A multi-pipe gas pipeline intelligent management system, characterized by: An intelligent management system for a double-pipe gas pipeline comprises an inner pipe, an outer pipe, a gate valve chamber, an extension pipe and an alarm system; the inner pipe is inserted into the outer pipe to form a double-pipe gas pipeline, the gas flows in the inner pipe, and an air cavity is formed between the inner pipe and the outer pipe; gate valve chambers are installed on the gas pipeline at regular intervals, and an electric-controlled gate valve is installed in the gate valve chamber; the outer pipe is connected to the gate valve chamber, and the inner pipe is connected to the electric-controlled gate valve; one end of the extension pipe is connected to the outer pipe of the gate valve chamber or the gas outlet end, and the other end is led to the air, and an alarm system is installed on the outside of the extension pipe; the alarm system is electrically connected to the electric-controlled gate valve.

2. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized in that: The gate valve chamber is not connected to the outer tube of the air supply end, but is connected to the outer tube of the air outlet end; thus, the gate valve chamber is connected to the air cavity of the air outlet end and is connected to the outside through the extension tube.

3. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized in that: The gate valve chamber is divided into a power chamber and a valve body chamber. The power chamber is equipped with an electric device, and the valve body chamber is equipped with an electric-controlled gate valve body. The power chamber and the valve body chamber are sealed and isolated.

4. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized in that: For the extension pipe of the underground gas pipeline, one end is buried underground and the other end is extended from the ground to the air; for the extension pipe of the vertical main gas pipeline of the building, it is extended from the upper end of the outer pipe of the main gas pipeline; the upper end of the extension pipe is equipped with a rain cap.

5. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized by: The alarm system is installed on the upper part of the extension tube. The gas sensing probe of the alarm system is placed inside the extension tube. The alarm system is equipped with a buzzer and a flash light. When the gas sensing probe senses that the gas density exceeds the standard, the buzzer of the alarm system will emit a harsh alarm sound, and the flash light will also flash to alarm. At the same time, the alarm system will close the electric control gate valve in the gate valve chamber to cut off the gas supply in the pipeline.

6. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized by: The alarm system is interconnected with the remote control center of the gas management department through the Internet. When the alarm system sends out an audible and visual alarm, the alarm signal is also transmitted to the control center. The management personnel of the control center will notify the emergency repair personnel through the location number of the alarm information and immediately rush to the scene for emergency repairs.

7. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized by: The outside of the outer tube can be covered with a sensing wire, which is electrically connected to the alarm system. Once the sensing wire is impacted by external force, it will transmit the impact signal to the alarm system. The alarm system will emit an audible and visual alarm and transmit the signal to the control center at the same time. The management personnel will immediately dispatch emergency repair personnel to the site for inspection and stop drilling or excavation and other acts that may damage the gas pipeline.

8. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized by: The double-pipe gas pipeline is introduced into the room, and a gas meter valve box is installed indoors; the gas meter valve box is equipped with a gas meter, a front-meter shut-off valve and a rear-meter electric shut-off valve; the inner pipe is connected to the front-meter shut-off valve, the front-meter shut-off valve is connected to the gas meter air inlet, the gas meter air outlet is connected to the rear-meter electric shut-off valve, the rear-meter electric shut-off valve is led out of the gas meter valve box through the gas pipe and connected to the gas cooker; the gas meter valve box is connected to the outer pipe, the outer pipe is connected to the outer pipe of the main pipe; the electric shut-off valve is electrically connected to the indoor gas alarm; any leakage in the components in the gas meter valve box and the inner pipe will be introduced into the outer pipe of the outdoor main pipe through the outer pipe, and then dissipated into the air through the extension pipe of the main pipe, avoiding the accumulation of gas indoors and causing an explosion when encountering open flames.

9. The multi-pipe gas pipeline intelligent management system according to claim 1 is characterized by: The double-pipe optimization and transformation of the original gas pipeline in the residential building; the gas main pipeline of the original residential building is installed indoors, running from the first floor to the top floor. For this situation, the transformation method based on the household is adopted to avoid the risk of gas leakage; first, an outer pipe is installed outside the main pipeline, and the upper part of the outer pipe is connected to the extension pipe, which passes through the wall and is led to the outside; the branch pipeline is also equipped with an outer pipe to form a double-pipe gas pipeline, and a gas meter valve box is installed indoors; the gas meter valve box is equipped with a gas meter, a pre-meter shut-off valve and a post-meter electric shut-off valve; the inner pipe of the branch pipeline is connected to the pre-meter shut-off valve, the pre-meter shut-off valve is connected to the gas meter air inlet, the gas meter air outlet is connected to the post-meter electric shut-off valve, and the post-meter electric shut-off valve is connected to the gas meter valve box and the gas stove through the gas pipe; the gas meter valve box is connected to the outer pipe of the branch pipeline, and the outer pipe of the branch pipeline is connected to the outer pipe of the main pipeline; the electric shut-off valve is electrically connected to the indoor gas alarm; if the components in the gas meter valve box and the inner pipe leak, they will be led to the outside through the extension pipe and dissipated in the air, avoiding the indoor accumulation and explosion caused by open flames.

10. The multi-pipe gas pipeline intelligent management system according to claims 8 and 9 is characterized in that: A gas sensing probe is installed in the gas meter valve box or inside the outer pipe of the indoor main pipeline, and the gas sensing probe is electrically connected to the indoor gas alarm; when the gas sensing probe senses that the gas in the gas meter valve box or the outer pipe of the main pipeline exceeds the standard, it will transmit the signal to the indoor gas alarm, and the indoor gas alarm will send out an audible and visual alarm, and actively cut off the electric shut-off valve behind the meter, and the householder will contact the gas maintenance personnel for inspection; if there is a gas leak in the indoor gas stove and its accessories, the indoor gas alarm will sense that the gas exceeds the standard, and will also send out an audible and visual alarm and actively cut off the electric shut-off valve behind the meter; after using the gas stove, close the stove valve, and at the same time close the electric shut-off valve behind the meter through the manual switch on the indoor gas alarm; when using the gas stove, first open the electric shut-off valve behind the meter through the manual switch on the indoor gas alarm, and then open the stove valve to ignite; in this way, the risk of explosion caused by gas leakage is fundamentally eliminated.

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