Family life gas system

Abstract

The invention relates to a family life gas system, which adopts a low-high pressure on-off valve to adjust the optimal metering range of a gas meter, a buffer gas tank to store gas and an inert gas monitoring technology, effectively improves the metering accuracy and stability of the family life gas meter, monitors the family life gas quality, and is high in system universality and high in practicability. The system can be effectively used for newly building a family life gas system and transforming a traditional family life gas system, and has great social and economic significance.

Description

Technical Field

[0001] The present invention relates to the technical field of domestic gas, and in particular to a domestic gas system using a low-pressure on-off valve and a buffer gas tank. Background Art

[0002] The popularization of household gas is of great significance. It not only improves the quality of life of residents, but also has a positive impact on environmental protection, economic development and energy security.

[0003] There are many possible reasons for the surge in gas prices, as analyzed below: 1. Gas meter design issues: When the flow rate is small, the gas meter is too sensitive. Slight pressure fluctuations of the airflow may cause the meter reading to be distorted. 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 positive or negative fluctuations. Therefore, false readings will inevitably occur, increasing the gas cost of users and bringing new unfairness. 2. Gas company issues: Some gas companies may intentionally or unintentionally mix inert gases, such as nitrogen or carbon dioxide, into the gas for profit, resulting in a decrease in the actual calorific value of the gas per unit volume. However, the price of the gas per unit volume remains unchanged, and the gas usage increases accordingly to meet the needs of family life. Under the premise that other conditions remain unchanged, the use of low-quality gas will inevitably lead to an increase in gas costs; 3. Gas source problem: The calorific value of the gas source supplied to the gas company decreases, which is eventually passed on to households, resulting in an increase in household gas bills; 4. If there is a gas pipeline leak or gas theft, the gas company will include this part of the loss in the gas cost, and the price increase will cause an increase in gas costs; 5. Inherent problems of gas metering instruments: The metering instruments have inherent defects, that is, when the flow rate is low or too large, the metering error caused by the metering accuracy is bound to be large. When the gas flow rate is between one-half and two-thirds of the metering instrument's range, the metering error is extremely small. Otherwise, the metering error may increase.

[0004] In addition, when the gas company's pipeline is under maintenance, gas will be shut off in designated areas and at designated time periods, which will inevitably affect the normal lives of residents in the corresponding areas.

[0005] The household gas system, such as household gas meters, profit-driven issues and gas charges, involves thousands of households.

[0006] In response to the above problems, it is worthy of in-depth study how to use technical means to solve the stability of household gas systems, the accuracy of household gas metering, and the inconvenience caused by gas outages in household gas systems, reduce the total social operating costs, and enhance people's social happiness and satisfaction. Summary of the invention

[0007] The purpose of the present invention is to solve the above-mentioned problems and to provide a household gas system, which adopts low-pressure and high-pressure opening and closing valves to adjust the metered gas volume, buffer gas tanks to store gas, and inert gas monitoring technology to effectively improve the metering accuracy and stability of household gas meters and monitor the quality of household gas, so as to save social public resources and improve people's quality of life and life satisfaction.

[0008] A household gas system, characterized in that: A low-pressure on-off valve 41 and a buffer gas tank 43 are provided between the gas meter 40 of the household gas system and the household gas facilities. When the household gas facility is put into use, the buffer gas tank 43 supplies gas to the gas facility through the indoor gas pipeline 46. When the pressure in the buffer gas tank 43 is at a set low pressure, the low and high pressure on-off valve 41 opens to allow air to enter. When the pressure in the buffer gas tank 43 reaches a set high pressure, the low and high pressure on-off valve 41 closes to stop allowing air to enter. Since the low- and high-pressure on-off valve 41 can automatically and smoothly replenish gas to the buffer gas tank 43 when the buffer gas tank 43 is at a set low pressure, the low- and high-pressure on-off valve 41 is closed when the pressure in the buffer gas tank 43 reaches the set high pressure, and the entire gas replenishment process is continuous and smooth, thereby ensuring the stable and accurate measurement of the gas meter 40; when the family uses gas, that is, when the gas facility is put into use, the gas pressure fluctuation and gas volume change of the family gas will be caused, but because the gas is supplied by the buffer gas tank 43, it will not affect the measurement of the gas meter 40, and it is always ensured that the gas meter 40 is started in the optimal metering accuracy range, thereby eliminating the influence of the changes in gas pressure and gas volume when the traditional family gas facilities are put into use on the metering accuracy of the gas meter 40, and also eliminating the influence of the traditional family gas facilities on the gas supply system when they are put into use.

[0009] The household gas facilities include gas water heaters, gas stoves, gas household hot water boilers, etc.

[0010] The low-pressure on-off valve 41 is started and stopped by mechanical, pneumatic or electric control.

[0011] An inert gas analyzer 49 is provided: the inert gas analyzer 49 is arranged between the low-pressure and high-pressure start-stop valve 41 and the household gas facilities.

[0012] The inert gas analyzer 49 is used to analyze the content of one or more gases such as nitrogen, carbon dioxide or argon in the fuel gas for judging the fuel gas quality.

[0013] The buffer gas tank 43 is provided with a safety valve 44, and the outlet pipe of the safety valve 44 is connected to an outdoor safe place.

[0014] The buffer gas tank 43 is provided with a pressure gauge, and the pressure gauge is within the verification validity period.

[0015] The household gas system is provided with a gas leakage detection instrument.

[0016] The household gas system is provided with a gas leakage alarm instrument.

[0017] The unspecified facilities in the domestic gas system are matched with reference to or in accordance with the reliable and mature technologies in the known domestic gas supply systems.

[0018] 1. Compared with the existing household gas system, the low-pressure on-off valve and buffer gas tank gas storage technology provided by the present invention are applied to the household gas system and have the following advantages: (1) It can ensure that the gas meter is in the optimal metering accuracy range, effectively avoiding the problem of large counting errors of the gas meter when the gas flow rate is small when using traditional household gas; (2) Avoid the so-called "gas theft" problem by users, facilitate users to monitor in real time and effectively whether the gas meter is in the counting state when not in use, eliminate the false rumors of gas companies' so-called remote control of meter readings, and help build a general sense of trust and security among the public; (3) When using gas for household life, it will cause fluctuations in gas pressure and changes in gas volume. However, since the gas is supplied by a buffer gas tank, it will not affect the measurement of the gas meter, thereby eliminating the influence of changes in gas pressure and gas volume on the measurement accuracy of the gas meter when the traditional household gas facilities are put into use, and eliminating the influence of the traditional household gas facilities on the gas supply system when they are put into use; however, the fluctuations in gas pressure and gas volume of household life lead to inaccurate measurement of user-side gas meters, increased gas costs for users, abnormal gas volume after the promotion of precision gas meters, and reports driven by departmental interests, which are often seen in newspapers and have a great social response, causing a negative impact on social fairness and credibility. The harm should not be underestimated. The technical solution of the present invention eliminates this disadvantage invisibly; (4) Since gas meters can measure smoothly, stably and accurately, there is no need to select or replace high-precision gas meters. Ordinary gas meters can meet the measurement accuracy requirements. There is no need to replace high-precision gas meters as is currently the case in many places. However, the replaced ordinary gas meters cannot be effectively utilized, which objectively leads to idleness and waste of resources. High-precision gas meters are difficult to manufacture and maintain, which increases the overall operating costs of society. (5) Due to the gas storage function of the buffer gas tank, when the gas supply department conducts gas pipeline maintenance and stops gas in a certain area and time period, it can select a suitable buffer gas tank whose storage gas volume can provide daily necessities without affecting the normal life of the family; 2. Compared with the prior art, the inert gas detector of the present invention helps users monitor gas quality and safeguard the legitimate interests of users; 3. Compared with the prior art, the household gas system of the present invention can utilize the existing gas supply pipeline to reasonably increase the pressure operation, avoid the pressure loss caused by the pressure reduction at the user end, reduce the gas transmission power consumption of the gas pipeline network, and improve the gas supply capacity of the pipeline network and the ability to supply more users without increasing the investment in the pipeline network; 4. Compared with the existing technical specifications for construction safety in the household gas industry, the technical solution of the present invention, if it becomes a general technical specification for the industry, will undoubtedly have great social and economic significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a household gas system of the present invention.

[0020] Figure 1 In: 40-gas meter, 41-low and high pressure on-off valve, 42-air intake pipe, 43-buffer gas tank, 44-safety valve, 46-indoor gas pipeline, 47-gas water heater, 48-gas stove, 49-inert gas analyzer. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1 The present invention is further described in detail with reference to the accompanying drawings and specific examples. Embodiment 1:

[0022] A household gas system, characterized in that: A low-pressure on-off valve 41 and a buffer gas tank 43 are arranged between the gas meter 40 of the household gas system and the household gas facilities. The gas enters the buffer gas tank 43 through the gas meter 40, the low-pressure on-off valve 41 and the air inlet pipe 42. When the household gas facility is put into use, the buffer gas tank 43 supplies gas to the gas facility through the indoor gas pipeline 46. When the pressure in the buffer gas tank 43 is at a set low pressure, the low and high pressure on-off valve 41 opens to allow air to enter. When the pressure in the buffer gas tank 43 reaches a set high pressure, the low and high pressure on-off valve 41 closes to stop allowing air to enter. Since the low- and high-pressure on-off valve 41 can automatically and smoothly replenish gas to the buffer gas tank 43 when the buffer gas tank 43 is at a set low pressure, the low- and high-pressure on-off valve 41 is closed when the pressure in the buffer gas tank 43 reaches the set high pressure, and the entire gas replenishment process is continuous and smooth, thereby ensuring the stable and accurate measurement of the gas meter 40; when the family uses gas, that is, when the gas facility is put into use, the gas pressure fluctuation and gas volume change of the family gas will be caused, but because the gas is supplied by the buffer gas tank 43, it will not affect the measurement of the gas meter 40, and it is always ensured that the gas meter 40 is started in the optimal metering accuracy range, thereby eliminating the influence of the changes in gas pressure and gas volume when the traditional family gas facilities are put into use on the metering accuracy of the gas meter 40, and also eliminating the influence of the traditional family gas facilities on the gas supply system when they are put into use.

[0023] The household gas facilities include a gas water heater 47, a gas stove 48, a gas household hot water boiler, and the like.

[0024] The start and stop of the low and high pressure on-off valve 41 is mechanically controlled (spring controls the start and stop of high and low pressures).

[0025] An inert gas analyzer 49 is provided: the inert gas analyzer 49 is arranged between the buffer gas tank 43 and the household gas facility.

[0026] The inert gas analyzer 49 is used to analyze the content of one or more gases such as nitrogen, carbon dioxide or argon in the fuel gas for judging the fuel gas quality.

[0027] The buffer gas tank 43 is provided with a safety valve 44, and the outlet pipe of the safety valve 44 is connected to an outdoor safe place.

[0028] The buffer gas tank 43 is provided with a pressure gauge, and the pressure gauge is within the verification validity period.

[0029] The household gas system is provided with a gas leakage detection instrument.

[0030] The household gas system is provided with a gas leakage alarm instrument.

[0031] The unspecified facilities in the domestic gas system are matched with reference to or in accordance with the reliable and mature technologies in the known domestic gas supply systems.

[0032] Although the present invention has been disclosed as above with preferred embodiments, they are not intended to limit the present invention. Anyone familiar with the art can make various changes or modifications without departing from the spirit and scope of the present invention, which also belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the definition of the claims of this application.

Claims

1. A household gas system, characterized in that: A low-pressure on-off valve (41) and a buffer gas tank (43) are provided between the gas meter (40) of the domestic gas system and the domestic gas facility. When a household gas facility is put into use, the buffer gas tank (43) supplies gas to the gas facility through an indoor gas pipeline (46). When the pressure in the buffer gas tank (43) is at a set low pressure, the low and high pressure on-off valve (41) opens to allow air to enter; when the pressure in the buffer gas tank (43) reaches a set high pressure, the low and high pressure on-off valve (41) closes to stop allowing air to enter.

2. The domestic gas system according to claim 1, characterized in that: The household gas facilities include gas water heaters, gas stoves, and gas household hot water boilers.

3. The domestic gas system according to claim 1, characterized in that: The low-pressure on-off valve (41) is started and stopped by mechanical, pneumatic or electric control.

4. The domestic gas system according to claim 1, characterized in that: Equipped with an inert gas analyzer (49): The inert gas analyzer (49) is arranged between the low-pressure on-off valve (41) and the domestic gas facility.

5. The domestic gas system according to claim 4, characterized in that: The inert gas analyzer (49) is used to analyze the content of one or more gases of nitrogen, carbon dioxide or argon in the fuel gas.

6. The domestic gas system according to claim 1, characterized in that: The buffer gas tank (43) is provided with a safety valve (44).

7. The domestic gas system according to claim 6, characterized in that: The outlet pipe of the safety valve (44) is connected to a safe location outdoors.

8. The domestic gas system according to claim 1, characterized in that: The buffer gas tank (43) is provided with a pressure gauge, and the pressure gauge is within the verification validity period.

9. The domestic gas system according to claim 1, characterized in that: The household gas system is provided with a gas leakage detection instrument.

10. The domestic gas system according to claim 1, characterized in that: The household gas system is provided with a gas leakage alarm instrument.

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