Family life gas system
By introducing low-pressure on/off valves and buffer gas tank technology into household gas systems, the problem of inaccurate low-flow gas meter readings has been solved, achieving stability and accuracy in gas metering, reducing gas costs, and improving user satisfaction and social equity.
Patent Information
- Application Number
- CN202520027672.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Existing gas meters are inaccurate under low flow conditions, which can easily lead to gas theft. Furthermore, the promotion of smart gas meters has been accompanied by public opinion concerns about metering errors and increased gas costs, which affect social fairness and credibility.
By employing low-pressure on/off valves and buffer gas tank technology, combined with smart gas meters, asynchronous gas consumption and metering are achieved. By storing gas in buffer gas tanks, the stability and accuracy of metering are ensured, and the impact of pressure and gas volume changes when gas facilities are put into operation on the metering is reduced.
It has improved the accuracy of gas metering, eliminated the problem of gas theft, reduced gas costs, enhanced user trust and social equity, and reduced the management difficulty and operating costs for gas companies.
Smart Images
Figure CN223649109U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of domestic gas technology, and in particular to a domestic gas system employing a low-pressure on / off valve and a buffer gas tank. Background Technology
[0002] The widespread use of household gas is of great significance, not only improving residents' quality of life but also having a positive impact on environmental protection, economic development, and energy security.
[0003] However, during the widespread use of natural gas, a problem urgently needed to be addressed: when gas flow is low (small flame), the sensitivity of household gas meters is insufficient, causing them to barely register operation and leading to the so-called "gas theft." Gas companies, citing this, proactively replaced the meters with newer, more accurate smart gas meters. However, the rollout of these new smart meters also triggered public opinion crises: for example, after a concentrated replacement of gas meters in several districts and counties of Chongqing at the end of 2023, residents continuously reported a surge in gas bills, with some increases reaching 3-4 times the previous amount. Some residents also reported that their gas meters continued to charge even after gas supply was cut off. Following the exposure of these incidents, central media outlets (CCTV News, People's Daily, Xinhua News Agency), local media (The Paper, Sohu News, Toutiao News), and influential social media accounts continuously followed up on the events, causing public opinion to escalate and spread. The Chongqing Municipal Government established a joint investigation team composed of four special inspection groups to conduct in-depth investigations into the gas companies, including Chongqing Gas Group, regarding issues such as gas meter quality, gas quality, meter measurement, and billing. On April 19, 2024, the joint investigation team released its findings, revealing six issues raised by some residents, including overcharging for gas. Chongqing Gas Group launched a fast-track service for on-site gas meter verification, promising same-day appointments, immediate processing, and on-site service within 24 hours. Simultaneously, Chongqing Gas Group Co., Ltd. issued a "clarification announcement" on the Shanghai Stock Exchange website, stating that all newly replaced gas meters had passed legal metrological verification and bore verification marks; regarding customer complaints of inaccurate gas meter readings and excessive gas costs, a fast-track service for on-site gas meter verification had been established, with dedicated personnel assigned to investigate. This incident temporarily concluded, but related public opinion began to spread to Chengdu, Nanjing, and other cities. Feedback regarding increased gas costs after meter replacement saw a significant increase compared to before the incident. For example, on April 21, 2024, the Modern Express reported on follow-up issues in Nanjing where users complained of a sharp increase in gas costs after replacing their meters.
[0004] There are many possible reasons for a surge in gas prices, as analyzed below:
[0005] 1. Gas meter design issues: When the flow rate is small, the gas meter is too sensitive. Even slight pressure fluctuations in the gas flow can cause the meter to read the value. However, by using mechanical transmission, such as the principle of wave power generation, it is possible to design a gas meter that can rotate and count regardless of whether the fluctuation is positive or negative. Therefore, false readings will inevitably occur, increasing the gas cost for users and bringing new unfairness.
[0006] 2. Gas company issues: Some gas companies may intentionally or unintentionally add inert gases, such as nitrogen or carbon dioxide, to the gas due to profit motives. This reduces the actual calorific value per unit volume of gas, but the price per unit volume of gas remains the same. As a result, the amount of gas used increases accordingly to meet the needs of household life. Under the premise that other conditions remain unchanged, using low-quality gas will inevitably lead to an increase in gas costs.
[0007] 3. Gas supply issues: The calorific value of the gas supplied to the gas company decreases, which is ultimately passed on to households, leading to increased household gas bills;
[0008] 4. If there is a gas pipeline leak or gas theft, the gas company will factor this loss into the gas cost, leading to price increases and higher gas bills.
[0009] 5. Inherent problems of gas metering instruments: Metering instruments have inherent defects, namely, at low flow rates, the measurement error caused by the measurement accuracy will inevitably be large.
[0010] In addition, when gas companies conduct pipeline maintenance, they will shut off gas supply in designated areas and at specific times, which will inevitably affect the normal lives of residents in the affected areas.
[0011] Household gas systems, such as home gas meters, profit-driven issues, and gas costs, involve countless households. If they are not given sufficient attention, any incidents will have a significant social impact and will inevitably have a negative effect on social fairness and credibility. The harm caused should not be underestimated.
[0012] The main disadvantages of traditional old-style gas meters compared to smart gas meters include the following:
[0013] 1. Low efficiency of manual meter reading: Old-style gas meters require regular manual reading, which is labor-intensive and prone to errors. This method is inefficient and greatly affected by objective factors. Meter readers cannot read meters at the scheduled time, and the reading date is often earlier or later.
[0014] 2. Lack of real-time feedback: Old-style gas meters cannot provide real-time gas consumption data. Users need to wait for meter readers to read the meter to know their gas consumption. This makes it impossible for users to understand their gas consumption in a timely manner and to manage their gas consumption reasonably.
[0015] 3. High maintenance costs: Due to their mechanical nature, older gas meters are more prone to wear and corrosion, leading to measurement errors and higher repair costs.
[0016] 4. Easily exploited for evasion: The pointer of an old-style gas meter barely moves when the flame is low or sluggish, which some users may take advantage of to evade payment.
[0017] 5. Outdated technology: With the development of technology, people have higher and higher requirements for the accuracy and convenience of metering. Old-fashioned gas meters cannot meet these needs, while smart gas meters, through a smart meter reading platform, will realize remote meter reading to households, real-time monitoring of pipeline network, and intelligent analysis of business operations, thereby improving meter reading efficiency.
[0018] 6. Inability to achieve intelligent management: Old-style gas meters cannot achieve remote data transmission, including steps such as data collection, storage, and transmission, and cannot completely get rid of the troubles of traditional gas meters.
[0019] In summary, traditional gas meters have significant drawbacks in terms of efficiency, accuracy, real-time performance, maintenance costs, and intelligent management, while smart gas meters demonstrate significant advantages in these areas. Therefore, replacing traditional gas meters with smart gas meters is an inevitable trend. The data analysis function of smart gas meters offers the following advantages:
[0020] 1. Gas usage behavior characteristics and habits: By analyzing the data collected by smart gas meters, users' gas usage behavior characteristics and habits can be obtained, and users' gas usage patterns and preferences can be understood;
[0021] 2. Gas consumption measurement: Smart gas meters can provide accurate gas consumption measurement, helping gas companies and users understand the specific gas consumption;
[0022] 3. Abnormal gas usage behavior detection: Data analysis can help detect abnormal gas usage behavior, such as gas leaks or theft, and enable timely maintenance and management;
[0023] 4. Resource conservation: By analyzing users' gas consumption data, gas companies can identify users' wasteful gas consumption behaviors and take targeted measures to remind users to conserve gas.
[0024] 5. Improved service quality: Data analysis from smart gas meters can help gas companies improve service quality by analyzing gas usage data to predict users' gas demand and take corresponding measures to ensure gas supply.
[0025] 6. Gas demand forecasting: Smart gas meters analyze users' historical gas consumption data and habits, and combine them with algorithm models to predict users' gas demand, helping gas companies adjust their gas supply plans.
[0026] 7. Gas usage optimization: The analysis and mining of smart gas meter data can be used for gas usage optimization, helping users and gas companies to make more rational use of gas resources;
[0027] 8. Gas-saving reminder: When a user's gas consumption exceeds a certain threshold, the smart gas meter can issue a reminder to guide the user to save gas.
[0028] 9. Data Reports: Smart gas meters can regularly send users reports on gas consumption and frequency, making users aware of their gas usage behavior and providing suggestions to help them reduce gas consumption.
[0029] These data analytics capabilities transform smart gas meters from mere metering tools into intelligent systems capable of providing in-depth insights into gas usage and offering optimization suggestions.
[0030] To address the aforementioned issues, it is worthy of in-depth research on how to use technological means to solve the problems of stability of household gas systems, accuracy of household gas metering, and inconvenience caused by gas outages, thereby reducing the overall social operating costs and enhancing people's sense of social well-being and satisfaction. Summary of the Invention
[0031] The purpose of this invention is to solve the above-mentioned problems and provide a household gas system that uses a smart gas meter, a low-pressure start-stop valve, and a buffer gas tank technology to effectively improve the metering accuracy and stability of the smart gas meter in the household gas system, thereby saving social public resources and improving people's quality of life and satisfaction.
[0032] A household gas system, characterized in that,
[0033] The household gas system is equipped with a main gas supply pipe smart gas meter 30, a first-user smart gas meter 40, a first-user low-pressure start-stop valve 41, a first-user buffer gas tank 43, a second-user smart gas meter 50, a second-user low-pressure start-stop valve 51, a second-user buffer gas tank 53, and an Nth-user smart gas meter 60, an Nth-user low-pressure start-stop valve 61, and an Nth-user buffer gas tank 63, where N ≥ 3.
[0034] Domestic gas flows through the main gas supply pipe 29, the main gas supply pipe smart gas meter 30, to user 1's smart gas meter 40, user 1's low-pressure start-stop valve 41, user 1's buffer gas tank 43, user 1's gas consumption facility 45, user 2's smart gas meter 50, user 2's low-pressure start-stop valve 51, user 2's buffer gas tank 53, user 2's gas consumption facility 55, or user N's smart gas meter 60, user N's low-pressure start-stop valve 61, user N's buffer gas tank 63, user N's gas consumption facility 65.
[0035] When the No. 1 gas supply facility 45 is put into operation, gas is supplied to the No. 1 gas supply facility 45 through the No. 1 user buffer gas tank 43.
[0036] When the No. 2 gas supply facility 55 is put into operation, gas is supplied to the No. 2 gas supply facility 55 through the No. 2 user buffer gas tank 53.
[0037] When gas supply facility 65 is put into operation, gas is supplied to gas supply facility 65 through user buffer gas tank 63.
[0038] The user-1 low-pressure start-stop valve 41 opens when the pressure in the user-1 buffer gas tank 43 is at the set low pressure, and closes when the pressure in the user-1 buffer gas tank 43 reaches the set high pressure, stopping gas supply.
[0039] The user-second low-pressure start-stop valve 51 opens when the pressure in the user-second buffer gas tank 53 is at the set low pressure, and closes when the pressure in the user-second buffer gas tank 53 reaches the set high pressure, stopping gas supply.
[0040] The N-user low-pressure start-stop valve 61 opens when the pressure in the N-user buffer gas tank 63 is at the set low pressure, and closes when the pressure in the N-user buffer gas tank 63 reaches the set high pressure, stopping gas supply.
[0041] Because the aforementioned low-pressure start-stop valve can automatically and smoothly replenish gas to the corresponding buffer gas tank when the pressure in the buffer gas tank is low, and close the low-pressure start-stop valve when the pressure in the buffer gas tank reaches the set high pressure, the entire gas replenishment process is continuous and stable, thus ensuring the stable and accurate metering of the smart gas meter. While the commissioning of gas facilities may cause pressure fluctuations and changes in gas volume, the buffer gas tank supply will not affect the metering of the smart gas meters for user number one, user number two, or user number N. This eliminates the impact of pressure and gas volume changes on the metering accuracy of smart gas meters during the commissioning of traditional gas facilities, and also eliminates the impact of gas facility commissioning on the gas supply system.
[0042] Equipped with a main water supply pipe low and high pressure start / stop valve 31 and a buffer tank 33:
[0043] Domestic gas flows through the main gas supply pipe 29, the main gas supply pipe smart gas meter 30, the main gas supply pipe low and high pressure start / stop valve 31, and the main gas inlet pipe 32 into the buffer tank 33, and then into user number one, user number two, or user number N.
[0044] The gas-using facility No. 1 45, gas-using facility No. 2 55, or gas-using facility No. N 65 includes gas stoves, gas water heaters, etc.
[0045] The main gas supply pipe 29, the gas inlet pipe 42 for user 1, the gas inlet pipe 52 for user 2, the gas inlet pipe 62 for user N, and the gas supply pipes between the corresponding buffer gas tanks and the gas-using facilities include pipes, fittings and their supports.
[0046] The pipe fittings include elbows, tees, crosses, reducers, pipe caps, plugs, etc.
[0047] The connections between pipes, between pipes and fittings, and between fittings are made by welding, hot-melt connection, expansion joint, snap-fit connection, or threaded connection.
[0048] The gas-using facilities include gas water heaters, gas stoves, gas-fired household hot water boilers, etc.
[0049] The low-pressure on / off valve is controlled by mechanical, pneumatic or electric means.
[0050] An inert gas analyzer is provided: the inert gas analyzer is located between the low-pressure and high-pressure start / stop valve and the gas-using facility.
[0051] The inert gas analyzer is used to analyze the content of one or more gases, such as nitrogen, carbon dioxide, or argon, in the fuel gas to determine the quality of the fuel gas.
[0052] The buffer tank 33 is equipped with a safety valve 34, and the outlet pipe of the safety valve 34 is connected to a safe location.
[0053] The No. 1 user buffer gas tank 43 is equipped with a No. 1 user safety valve 44, and the outlet pipe of the No. 1 user safety valve 44 is connected to a safe outdoor location.
[0054] The No. 1 user buffer gas tank 43 is equipped with a pressure gauge, which is within its calibration validity period.
[0055] The second user buffer gas tank 53 is equipped with a second user safety valve 54, and the outlet pipe of the second user safety valve 54 is connected to a safe outdoor location.
[0056] The second user buffer gas tank 53 is equipped with a pressure gauge, which is within its calibration validity period.
[0057] The Nth user buffer gas tank 63 is equipped with an Nth user safety valve 64, and the outlet pipe of the Nth user safety valve 64 is connected to a safe outdoor location.
[0058] The N-number user buffer gas tank 63 is equipped with a pressure gauge, which is within its calibration validity period.
[0059] The household gas system is equipped with a gas leak detection instrument.
[0060] The household gas system is equipped with a gas leak alarm.
[0061] Unspecified facilities in the household gas system shall be equipped with reliable and mature technologies known in household gas supply systems.
[0062] Unspecified facilities in the household gas system shall be equipped with reliable and mature technologies in known gas supply pipelines, with reference to or in accordance with such technologies.
[0063] The present invention has the following advantages over the prior art:
[0064] 1. Compared with existing household gas systems, the low-pressure on / off valve and buffer gas tank storage technology of this invention, when applied to household gas systems, have the following advantages:
[0065] (1) It can ensure that the gas meter is in the optimal metering accuracy range and effectively avoid the problem of large counting error of gas meter when the gas flow rate is small in traditional households. The essential breakthrough of this invention is to change the traditional simultaneous gas consumption and metering into intermittent metering with asynchronous gas consumption and metering and accumulation into large flow rate, so that the metering of smart gas meter is in the optimal range.
[0066] (2) To avoid the so-called "gas theft" problem of users, to facilitate users to monitor in real time whether the gas meter is in the counting state when gas is not in use, to eliminate the false rumors of gas companies remotely controlling the meter reading, and to help establish a general sense of trust and security among the public.
[0067] (3) When using gas in a household, there will be fluctuations in gas pressure and gas volume. However, since the gas is supplied by a buffer gas tank, it will not affect the measurement of the gas meter. This eliminates the impact of gas pressure and gas volume changes on the measurement accuracy of the gas meter when traditional household gas facilities are put into use, and also eliminates the impact of traditional household gas facilities on the gas supply system. However, the inaccuracy of the gas meter at the user end caused by fluctuations in gas pressure and gas volume, the increase in gas cost for users, the abnormal gas volume after the promotion of precision gas meters, and reports driven by departmental interests are common in the newspapers, causing a great social reaction and negatively impacting social fairness and credibility. The harm should not be underestimated. The technical solution of this invention eliminates this drawback invisibly.
[0068] (4) Due to the gas storage function of the buffer gas tank, when the gas supply department carries out maintenance on the gas supply pipeline and shuts off the gas in a certain area or at a certain time, a suitable buffer gas tank can be selected. Its stored gas volume can meet the needs of daily life and will not affect the normal life of the family.
[0069] (5) Since the main gas supply pipe smart gas meter and the user terminal smart gas meter can accurately measure and have a very small measurement error, by comparing the main gas supply pipe smart gas meter and the user terminal smart gas meter, it is convenient to find the leak point or discover abnormal gas use such as gas theft, providing reliable technical support for the maintenance and operation management of the domestic gas system.
[0070] 2. Compared with existing technologies, the inert gas detector of the present invention helps users monitor gas quality and protect their legitimate interests;
[0071] 3. Compared with the prior art, the household gas system of the present invention can make reasonable use of existing gas supply pipelines to increase pressure operation, avoid pressure loss caused by reduced pressure at the user end, reduce the gas pipeline network's gas transmission power consumption, and improve the pipeline network's gas supply capacity and the ability to supply more users without increasing pipeline network investment.
[0072] 4. Compared with existing safety technical specifications for the construction of residential gas systems, the technical solution of this invention, if it becomes a universal technical specification for the industry, will undoubtedly have enormous social and economic significance. Attached Figure Description
[0073] Figure 1 This is a schematic diagram of a household gas system according to the present invention.
[0074] Figure 1 In the middle: 29-Main gas supply pipe, 30-Main gas supply pipe smart gas meter, 31-Main gas supply pipe low and high pressure start / stop valve, 32-Main gas inlet pipe, 33-Buffer tank, 34-Safety valve, 40-User No. 1 smart gas meter, 41-User No. 1 low and high pressure start / stop valve, 42-User No. 1 gas inlet pipe, 43-User No. 1 buffer tank, 44-User No. 1 safety valve, 45-User No. 1 gas facility, 46-User No. 1 gas supply pipe, 50-User No. 2 smart gas meter 51 - Low-pressure start-stop valve for user No. 2; 52 - Gas inlet pipe for user No. 2; 53 - Buffer gas tank for user No. 2; 54 - Safety valve for user No. 2; 55 - Gas usage facility for user No. 2; 56 - Gas supply pipe for user No. 2; 60 - Smart gas meter for user No. N; 61 - Low-pressure start-stop valve for user No. N; 62 - Gas inlet pipe for user No. N; 63 - Buffer gas tank for user No. N; 64 - Safety valve for user No. N; 65 - Gas usage facility for user No. N; 66 - Gas supply pipe for user No. N. Detailed Implementation
[0075] The following is in conjunction with the appendix Figure 1 The present invention will be further described in detail with reference to specific embodiments.
[0076] Example 1:
[0077] A household gas system includes a main gas supply pipe smart gas meter 30, a first-user smart gas meter 40, a first-user low-pressure start-stop valve 41, a first-user buffer gas tank 43, a second-user smart gas meter 50, a second-user low-pressure start-stop valve 51, a second-user buffer gas tank 53, and Nth-user smart gas meters 60, Nth-user low-pressure start-stop valve 61, and Nth-user buffer gas tank 63, wherein N≥3 for the Nth user.
[0078] Domestic gas flows through the main gas supply pipe 29, the main gas supply pipe smart gas meter 30, to user 1's smart gas meter 40, user 1's low-pressure start-stop valve 41, user 1's buffer gas tank 43, user 1's gas consumption facility 45, user 2's smart gas meter 50, user 2's low-pressure start-stop valve 51, user 2's buffer gas tank 53, user 2's gas consumption facility 55, or user N's smart gas meter 60, user N's low-pressure start-stop valve 61, user N's buffer gas tank 63, user N's gas consumption facility 65.
[0079] When the No. 1 gas supply facility 45 is put into operation, gas is supplied to the No. 1 gas supply facility 45 through the No. 1 user buffer gas tank 43 and the No. 1 user gas supply pipeline 46.
[0080] When the No. 2 gas supply facility 55 is put into operation, gas is supplied to the No. 2 gas supply facility 55 through the No. 2 user buffer gas tank 53 and the No. 2 user gas supply pipeline 56.
[0081] When gas supply facility 65 is put into operation, gas is supplied to gas supply facility 65 through user N buffer gas tank 63 and user N gas supply pipeline 66.
[0082] The user-1 low-pressure start-stop valve 41 opens when the pressure in the user-1 buffer gas tank 43 is at the set low pressure, and closes when the pressure in the user-1 buffer gas tank 43 reaches the set high pressure, stopping gas supply.
[0083] The user-second low-pressure start-stop valve 51 opens when the pressure in the user-second buffer gas tank 53 is at the set low pressure, and closes when the pressure in the user-second buffer gas tank 53 reaches the set high pressure, stopping gas supply.
[0084] The N-user low-pressure start-stop valve 61 opens when the pressure in the N-user buffer gas tank 63 is at the set low pressure, and closes when the pressure in the N-user buffer gas tank 63 reaches the set high pressure, stopping gas supply.
[0085] Because the aforementioned low-pressure start-stop valve can automatically and smoothly replenish gas to the corresponding buffer gas tank when the pressure in the buffer gas tank is low, and close the low-pressure start-stop valve when the pressure in the buffer gas tank reaches the set high pressure, the entire gas replenishment process is continuous and stable, thus ensuring the stable and accurate metering of the smart gas meter. While the commissioning of gas facilities may cause pressure fluctuations and changes in gas volume, the buffer gas tank supply will not affect the metering of the smart gas meters for user number one, user number two, or user number N. This eliminates the impact of pressure and gas volume changes on the metering accuracy of smart gas meters during the commissioning of traditional gas facilities, and also eliminates the impact of gas facility commissioning on the gas supply system.
[0086] Equipped with a main water supply pipe low and high pressure start / stop valve 31 and a buffer tank 33:
[0087] Domestic gas flows through the main gas supply pipe 29, the main gas supply pipe smart gas meter 30, the main gas supply pipe low and high pressure start / stop valve 31, and the main gas inlet pipe 32 into the buffer tank 33, and then into user number one, user number two, or user number N.
[0088] The gas-using facility No. 1 45, gas-using facility No. 2 55, or gas-using facility No. N 65 includes gas stoves, gas water heaters, etc.
[0089] The main gas supply pipe 29, the gas inlet pipe 42 for user 1, the gas inlet pipe 52 for user 2, the gas inlet pipe 62 for user N, and the gas supply pipes between the corresponding buffer gas tanks and the gas-using facilities include pipes, fittings and their supports.
[0090] The pipe fittings include elbows, tees, crosses, reducers, pipe caps, plugs, etc.
[0091] The connections between pipes, between pipes and fittings, and between fittings are made by welding, hot-melt connection, expansion joint, snap-fit connection, or threaded connection.
[0092] The gas-using facilities include gas water heaters, gas stoves, gas-fired household hot water boilers, etc.
[0093] The low-pressure on / off valve is controlled by mechanical, pneumatic or electric means.
[0094] An inert gas analyzer is provided: the inert gas analyzer is located between the low-pressure and high-pressure start / stop valve and the gas-using facility.
[0095] The inert gas analyzer is used to analyze the content of one or more gases, such as nitrogen, carbon dioxide, or argon, in the fuel gas to determine the quality of the fuel gas.
[0096] The buffer tank 33 is equipped with a safety valve 34, and the outlet pipe of the safety valve 34 is connected to a safe location.
[0097] The No. 1 user buffer gas tank 43 is equipped with a No. 1 user safety valve 44, and the outlet pipe of the No. 1 user safety valve 44 is connected to a safe outdoor location.
[0098] The No. 1 user buffer gas tank 43 is equipped with a pressure gauge, which is within its calibration validity period.
[0099] The second user buffer gas tank 53 is equipped with a second user safety valve 54, and the outlet pipe of the second user safety valve 54 is connected to a safe outdoor location.
[0100] The second user buffer gas tank 53 is equipped with a pressure gauge, which is within its calibration validity period.
[0101] The Nth user buffer gas tank 63 is equipped with an Nth user safety valve 64, and the outlet pipe of the Nth user safety valve 64 is connected to a safe outdoor location.
[0102] The N-number user buffer gas tank 63 is equipped with a pressure gauge, which is within its calibration validity period.
[0103] The household gas system is equipped with a gas leak detection instrument.
[0104] The household gas system is equipped with a gas leak alarm.
[0105] Unspecified facilities in the household gas system shall be equipped with reliable and mature technologies known in household gas supply systems.
[0106] Unspecified facilities in the household gas system shall be equipped with reliable and mature technologies in known gas supply pipelines, with reference to or in accordance with such technologies.
[0107] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the invention. Any person skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention, and these changes also fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims of this application.
Claims
1. A household gas system, characterized in that, The household gas system is equipped with a main gas supply pipe smart gas meter (30), a No. 1 user smart gas meter (40), a No. 1 user low-pressure start-stop valve (41), a No. 1 user buffer gas tank (43), a No. 2 user smart gas meter (50), a No. 2 user low-pressure start-stop valve (51), a No. 2 user buffer gas tank (53), an Nth user smart gas meter (60), an Nth user low-pressure start-stop valve (61), and an Nth user buffer gas tank (63), wherein N≥3 for the Nth user. Domestic gas flows through the main gas supply pipe (29), the main gas supply pipe smart gas meter (30) to the No. 1 user smart gas meter (40), the No. 1 user low-pressure start-stop valve (41), the No. 1 user buffer gas tank (43), the No. 1 gas consumption facility (45), the No. 2 user smart gas meter (50), the No. 2 user low-pressure start-stop valve (51), the No. 2 user buffer gas tank (53), the No. 2 gas consumption facility (55), or the No. N user smart gas meter (60), the No. N user low-pressure start-stop valve (61), the No. N user buffer gas tank (63), the No. N gas consumption facility (65). When the No. 1 gas supply facility (45) is put into operation, gas is supplied to the No. 1 gas supply facility (45) through the No. 1 user buffer gas tank (43). When the No. 2 gas supply facility (55) is put into operation, gas is supplied to the No. 2 gas supply facility (55) through the No. 2 user buffer gas tank (53). When the No. N gas supply facility (65) is put into operation, gas is supplied to the No. N gas supply facility (65) through the No. N user buffer gas tank (63). The No. 1 user low-pressure start-stop valve (41) opens when the pressure in the No. 1 user buffer gas tank (43) is at the set low pressure, and closes when the pressure in the No. 1 user buffer gas tank (43) reaches the set high pressure, stopping gas supply. When the pressure in the buffer tank (53) of user No. 2 is at the set low pressure, the low-pressure start-stop valve (51) of user No. 2 opens; when the pressure in the buffer tank (53) of user No. 2 reaches the set high pressure, the low-pressure start-stop valve (51) of user No. 2 closes, stopping gas supply. When the pressure in the buffer gas tank (63) of user N is at the set low pressure, the low-pressure start-stop valve (61) of user N opens. When the pressure in the buffer gas tank (63) of user N reaches the set high pressure, the low-pressure start-stop valve (61) of user N closes and stops gas supply.
2. The household gas system according to claim 1, characterized in that, Equipped with a main gas supply pipe low-pressure start / stop valve (31) and a buffer tank (33): Domestic gas enters the buffer tank (33) via the main gas supply pipe (29), the smart gas meter of the main gas supply pipe (30), the low and high pressure start-stop valve of the main gas supply pipe (31), and the main gas inlet pipe (32), and then enters the first user, the second user, or the Nth user.
3. The household gas system according to claim 1, characterized in that, The No. 1 gas-using facility (45), No. 2 gas-using facility (55) or No. N gas-using facility (65) includes gas stoves, gas water heaters or gas hot water boilers.
4. The household gas system according to claim 1, characterized in that, The main gas supply pipe (29), the No. 1 user gas inlet pipe (42), the No. 2 user gas inlet pipe (52), the Nth user gas inlet pipe (62), and the gas supply pipes between the corresponding buffer water tanks and the gas-using facilities include pipes, fittings and their supports.
5. The household gas system according to claim 4, characterized in that, The pipe fittings include elbows, tees, crosses, reducers, pipe caps, or plugs.
6. The household gas system according to claim 4, characterized in that, In the main gas supply pipe (29), the No. 1 user gas inlet pipe (42), the No. 2 user gas inlet pipe (52), the Nth user gas inlet pipe (62), the gas supply pipe between the buffer gas tank and the gas-using facilities, the connection between pipes, between pipes and fittings, and between fittings is achieved by welding, hot-melt connection, expansion joint, snap-fit connection or threaded connection.
7. The household gas system according to claim 1, characterized in that, An inert gas analyzer is provided: the inert gas analyzer is located between the low-pressure and high-pressure start / stop valve and the gas-using facility.
8. The household gas system according to claim 7, characterized in that, The inert gas analyzer is used to analyze the content of one or more gases, such as nitrogen, carbon dioxide, or argon, in the fuel gas to determine the quality of the fuel gas.
9. The household gas system according to claim 1, characterized in that, The household gas system is equipped with a gas leak detection instrument.
10. The household gas system according to claim 1, characterized in that, The household gas system is equipped with a gas leak alarm.