Inspection assembly for safety device of resident gas tightness test

Abstract

The utility model relates to an assembly for inspecting a safety device for a resident fuel gas tightness test, which is mainly used for detecting the tightness between fuel gas equipment and a fuel gas pipeline. The device comprises a pressure gauge, a pressure gauge interface and a four-way device, wherein the pressure gauge is communicated with the four-way device through the interface. The four-way device is provided with four threaded connectors, a standard threaded pipe can be replaced, the four-way device is further provided with a plurality of hose connectors, and the four-way device can be connected with a pipeline to be detected, gas equipment or a pressurizing device in a hoop sealing mode. During use, leakage is judged by pressurizing the detection loop and observing the change of a pressure indicator, and leakage is judged when the pressure is lower than a rated value. The device is simple and convenient to operate and high in detection precision, provides guarantee for gas safety, and has important practical value and wide application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas detection technical field, concretely relates to a four-way gas leakage detection device for detecting the tightness of gas equipment and pipeline connecting parts. BACKGROUND

[0002] In the process of gas transportation and use, ensuring that the gas equipment and the connecting parts between the gas equipment and the pipeline have good tightness is crucial for protecting the life and property safety of users and the stable operation of the gas system. At present, in the gas industry, the detection of gas leakage mainly exists the following several traditional methods and prior art:

[0003] Firstly, the simple soap bubble method, which is a relatively primitive detection method. The operator applies soap water to the possible leakage point and observes whether bubbles are generated to judge whether there is leakage. Although this method has low cost, its detection efficiency is extremely low, and it relies on manual operation, making it difficult to detect some relatively concealed or inaccessible connecting parts. The detection precision for small leaks is also very limited, and it is easy to miss the leakage point, which cannot meet the detection needs of large-scale gas systems.

[0004] Secondly, the local detection system based on pressure sensors. Some existing technologies use pressure sensors to monitor the pressure of the local area of the gas pipeline. However, such systems can only detect straight pipelines or simple connecting parts. For complex connecting structures such as four-way, their detection capability is insufficient, and they cannot accurately detect the case where multiple connecting points leak at the same time. Moreover, they are not comprehensive in overall tightness evaluation.

[0005] Thirdly, the chemical sensor detection method, which uses chemical sensors to detect the chemical composition of gas to determine whether leakage occurs. This method can play a certain role in some specific environments, but chemical sensors are easily disturbed by other gases in the environment, and their service life is relatively short, requiring frequent replacement of sensors, resulting in high maintenance costs. At the same time, when detecting complex connecting structures, there are limitations in detection range and precision.

[0006] In summary, the existing technologies have low detection efficiency, insufficient precision, incomplete coverage, and high maintenance costs in detecting the tightness of gas equipment and pipelines, which cannot meet the high requirements of current gas systems for safety and reliability. Therefore, there is an urgent need for a professional device that can quickly and accurately detect the tightness of gas equipment and connecting parts to improve the safety and reliability of gas use. UTILITY MODEL CONTENTS

[0007] In order to overcome the above problems or at least partially solve the above problems, the utility model aims at providing a kind of resident gas tightness test safety device inspection's assembly, solve the problems, such as low detection efficiency, insufficient precision, not comprehensive coverage and high maintenance cost, in the tightness detection of gas equipment and pipeline in prior art, cannot meet the high requirements of current gas system on safety and reliability.

[0008] The utility model provides a kind of resident gas tightness test safety device inspection's assembly, it includes: pressure gauge, pressure gauge interface and four-way device, pressure gauge interface is arranged below pressure gauge, pressure gauge interface is connected with four-way device, the pressure gauge is communicated with four-way device by pressure gauge interface, the four-way device includes: four-way device main body, four threaded interfaces corresponding with four-way and multiple hose interfaces, the telescopic test device is used to test the safety of self-closing valve and alarm solenoid valve, the pressurizing device is used to pressurize for component test.

[0009] In some embodiments of the utility model, the threaded interface can be replaced with multiple standard threaded pipes according to requirements.

[0010] In some embodiments of the utility model, the multiple hose interfaces are set according to actual detection requirements.

[0011] In some embodiments of the utility model, the hose interface is used to connect the pipeline to be detected, gas equipment to be detected or pressurizing device.

[0012] In some embodiments of the utility model, the hose interface is used to connect the pipeline to be detected, gas equipment to be detected or pressurizing device, and the sealing method adopted is clamp sealing.

[0013] In some embodiments of the utility model, the pressurizing device includes electric pressurizing device or manual pressurizing device.

[0014] In some embodiments of the utility model, the pressure gauge and four-way device are connected by threaded interface.

[0015] In some embodiments of the utility model, the pressure gauge range is more than 10 kPa.

[0016] In some embodiments of the utility model, the telescopic test device is a multiple-break telescopic gas pipe.

[0017] Further, in some embodiments of the utility model, the following features are also included:

[0018] Overall structure:

[0019] Mainly includes pressure gauge, pressure gauge interface and four-way device. The pressure gauge is located at the top of the device, and the pressure gauge interface is closely connected below it. The pressure gauge realizes communication with the four-way device through the interface.

[0020] The four-way device as the core component is composed of a four-way device main body, four threaded interfaces corresponding to the four-way, and multiple hose interfaces.

[0021] Threaded interface design:

[0022] The threaded interface adopts standardized design, and its thread specification conforms to the industry standard. Multiple standard threaded pipes can be easily replaced according to actual detection needs. This makes the device adapt to gas pipelines or equipment interfaces of different pipe diameters and connection methods, greatly improving the versatility and flexibility of the device.

[0023] Hose interface design:

[0024] Multiple hose interfaces are reasonably set according to specific detection tasks and actual site conditions. These hose interfaces are mainly used to connect the pipeline to be detected, the gas equipment to be detected, or the pressurizing device.

[0025] To ensure the sealing of the connection, the hose interface adopts a clamp sealing method. The clamp is made of high-strength, corrosion-resistant metal material, and has a sealing rubber ring inside. When the clamp is tightened, the rubber ring can tightly fit the hose and the interface, effectively preventing gas leakage and ensuring the accuracy of the detection process.

[0026] Pressurizing device types:

[0027] The pressurizing device includes two types: electric pressurizing device and manual pressurizing device, which can be selected according to the detection scene and user needs. The electric pressurizing device can achieve precise pressure control and fast pressurizing process, suitable for occasions with high requirements on detection efficiency and accuracy; the manual pressurizing device has the advantages of simple operation, low cost, and no need for external power supply, which has great advantages in some temporary detection or places where power supply is inconvenient.

[0028] Connection method and pressure gauge range:

[0029] The pressure gauge and the four-way device are connected by threaded connection through the threaded interface. This connection method is firm and reliable, and is convenient for installation and disassembly.

[0030] The selected pressure gauge has a range of 10 kilopascals or more. This range is carefully designed to meet the detection needs of most gas equipment and pipeline connection parts. Within this range, the pressure gauge can accurately display the pressure change of the detection part. When the pressure does not reach the rated pressure, it can be determined that there is a gas leak.

[0031] The embodiments of the utility model have at least the following advantages or beneficial effects:

[0032] 1. The utility model discloses a whole structure reasonable design, combines organically pressure gauge, pressure gauge interface and four -way device, has formed a complete and compact gas leakage detection system. The integrated design makes the device more convenient in the installation and operation process, reduces the connecting complexity between parts, improves the detection efficiency, can carry out the leakproofness detection to gas equipment and pipeline connecting part quickly, ensures the safe operation of gas system.

[0033] 2. The utility model discloses the threaded interface can replace the standard threaded pipe's characteristic greatly enhanced the versatility of device. In actual detection scene, the interface pipe diameter and thread specification of gas pipeline and equipment are various, can replace the standard threaded pipe, so that the device can easily adapt to different connection needs, need not be equipped with multiple special detection devices for different specifications interface, reduces the detection cost, improves the flexibility and convenience of detection.

[0034] 3. The utility model discloses a plurality of hose interfaces are set according to actual detection demand, provide convenience for connecting the pipeline to be detected, the gas equipment to be detected or pressurizing device. In the complex gas system detection, can flexibly select the connection object according to different detection tasks and layout, realize the detection of multiple parts or different equipment simultaneously, expand the detection range, improve the comprehensiveness and accuracy of detection.

[0035] 4. The utility model discloses the clamp sealing mode that hose interface adopts, utilizes sealing rubber ring to closely adhere connecting part, effectively prevents gas leakage. In the detection process, the sealing property of detection circuit is ensured, the pressure leakage and detection error caused by the sealing not being strict are avoided, the reliability and stability of detection result are improved, so that the judgment of gas leakage is more accurate.

[0036] 5. The utility model discloses the electric and manual two kinds of pressurizing devices, satisfy different detection scene and user demand. The accurate pressure control and quick pressurizing capacity of electric pressurizing device can reach the predetermined pressure quickly and keep stable in the occasion that the detection efficiency and precision requirement are higher, save detection time, the simple operation and the characteristics of manual pressurizing device without external power supply make it convenient to use in temporary detection or power supply inconvenient place, improve the applicability and practicality of device.

[0037] 6. The utility model discloses the screw connection mode of pressure gauge and four -way device is firm and reliable and convenient to install and detach. In the long -term use process, can keep stable connection state, reduce the detection error and equipment failure caused by the connection loosening. At the same time, the convenient installation and detachment characteristics make the equipment maintenance and replacement parts more easily, reduce the maintenance cost and difficulty.

[0038] 7. The utility model discloses select 10 kiloPascal above's pressure gauge, after careful design, with the detection demand of most gas equipment and pipeline connecting part is matched. In this range, the pressure gauge can sensitively reflect the pressure change of the detection part, and accurately judge whether there is gas leakage.

[0039] 8. The utility model discloses the hoop is made of high strength, corrosion -resistant metal material, has guaranteed its reliability and sealability under the long -term use and different environmental conditions. Whether in the severe weather environment or in the place with corrosive gas, the hoop can keep good performance, reduces the seal failure and equipment failure because of the hoop damage or corrosion, prolongs the service life of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope. For ordinary skilled person in the art, other related drawings can also be obtained according to these drawings without creating labor.

[0041] Fig. 1 It is the front view structural drawing of the utility model;

[0042] Fig. 2 It is the rear view structural drawing of the utility model;

[0043] Fig. 3 It is the left view structural drawing of the utility model;

[0044] Fig. 4 It is the schematic drawing of connecting the pressurizing device of the utility model;

[0045] Fig. 5 It is the structural schematic drawing of the utility model in telescopic test device.

[0046] The drawing mark explanation: 1. pressure gauge, 2. pressure gauge interface, 3. four-way device, 301. four-way device main body, 302. screw thread interface, 303. hose interface, 4, telescopic test device, 5, pressurizing device. DETAILED DESCRIPTION

[0047] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope. For ordinary skilled person in the art, other related drawings can also be obtained according to these drawings without creating labor.

[0048] The following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of the application. Based upon the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of the present application.

[0049] As Figs. 1-3 The utility model discloses a kind of safety device inspection components of resident gas tightness test, it includes: pressure gauge 1, pressure gauge interface 2 and four-way device 3, pressure gauge 1 below is provided pressure gauge interface 2, pressure gauge interface 2 is connected with four-way device 3, the pressure gauge 1 is communicated with four-way device 3 by pressure gauge interface 2, the four-way device 3 includes: four-way device main body 301, four threaded interfaces 302 corresponding to four-way and multiple hose interfaces 303, the telescopic test device 4 is used to test the safety of self-closing valve and alarm solenoid valve, the pressurizing device 5 is used for pressurizing for component test.

[0050] In the embodiment of the utility model, threaded interface 302 can be replaced according to demand Multiple standard threaded pipes.

[0051] In the embodiment of the utility model, multiple hose interfaces 303 are set according to actual detection needs.

[0052] In the embodiment of the utility model, hose interface 303 is used to connect to be detected pipeline, to be detected gas equipment or pressurizing device.

[0053] In the embodiment of the utility model, hose interface 303 is used to connect to be detected pipeline, to be detected gas equipment or pressurizing device, and its adopted sealing mode is clamp sealing.

[0054] In the embodiment of the utility model, the pressurizing device includes electric pressurizing device or manual pressurizing device.

[0055] In the embodiment of the utility model, pressure gauge 1 and four-way device 3 are connected by threaded interface 302.

[0056] In the embodiment of the utility model, the range of pressure gauge 1 is 10 kilopascal or more.

[0057] In the embodiment of the utility model, telescopic test device is multiple breakable telescopic intercommunication air pipe.

[0058] Embodiment 1

[0059] Low-pressure pipeline tightness test

[0060] Device setting: Select a high-precision digital pressure gauge with a range of 10-30 kPa and an accuracy of 0.1 kPa as pressure gauge 1, connect it to four-way device 3 through a specially designed sealed threaded interface 2 to ensure tight connection and good sealing. The main body 301 of the four-way device is made of high-strength stainless steel, which can withstand certain pressure and has strong corrosion resistance. The four threaded interfaces 302 all meet the general standard thread specifications, and different standard threaded pipes can be flexibly replaced according to the pipe diameter. Set 5 hose interfaces 303, use stainless steel clamps for sealing, and the sealing rubber ring in the clamp is made of anti-aging and high-elasticity material with a thickness of 4mm to ensure reliable sealing effect. The pressure device selects an electric pressure pump, which has a pressure regulation accuracy of ±0.03 kPa and an automatic pressure control program, which can realize precise pressure.

[0061] Detection process: The tightness test of the low-pressure gas pipeline in a new residential area was carried out, and the design pressure of the pipeline was 8 kPa. According to the actual pipe diameter, select the appropriate standard threaded pipe and install it on the threaded interface 302, and then firmly connect the hose connecting the pipeline to the hose interface 303 with the clamp. Start the electric pressure pump and slowly pressurize the detection circuit according to the preset program, so that the pressure gradually rises to 8 kPa. During the pressurization process, the pressure gauge 1 is monitored in real time through the pressure control system. After the pressure reaches 8 kPa, stop pressurizing and maintain for 15 minutes. During the pressure maintaining period, carefully observe the pressure gauge 1, the pressure is stable throughout the process and does not decrease, and according to the low-pressure pipeline tightness test pressure standard (design pressure and not less than 5 kPa), it is determined that the low-pressure pipeline connection part has good airtightness.

[0062] Comparative Example 1

[0063] The same section of pipeline in the same area was detected by the traditional soap bubble method. The detection personnel need to apply soap water at each connection part of the pipeline, but due to the hidden position of part of the pipeline area, it is difficult to fully apply and observe. And manual observation is greatly affected by light and angle, and small leaks are not easy to detect. The detection consumes a lot of time, and finally no obvious bubbles are found, but it cannot be determined whether there is a small leak, and the airtightness of the pipeline cannot be accurately judged.

[0064] Example 2

[0065] Indoor low-pressure pipeline replacement diffusion

[0066] Device settings: a range of 10-40 kilopascal pointer pressure gauge as pressure gauge 1, the accuracy of 0.2 kilopascal. Pressure gauge interface 2 using a special sealing structure, not only can enhance the connection sealing, but also facilitate quick installation and removal. Four-way device 3 four-way device main body 301 for carbon steel material, the surface after rust treatment, to ensure long-term use of stable performance. Threaded connection 302 can be replaced with a range of 1 / 2 inch-3 inch standard threaded pipe, to adapt to different specifications of the pipeline connection. Set 6 hose interface 303, clamp using high-strength aluminum alloy material, sealing rubber ring after special vulcanization treatment, moderate hardness and good sealing. Select the manual pressure device, its operating lever design in line with ergonomics, with anti-skid texture and labor-saving lever structure, pressure display components for clear large scale dial, and equipped with backlight function, convenient in low light environment reading.

[0067] Detection process: in a certain old residential building indoor low-pressure gas pipeline replacement diffusion operation, first of all, the detection device is correctly connected to the pipeline system. According to the pipeline conditions, install the appropriate threaded pipe and hose, then use the manual pressure device to inject inert gas (such as nitrogen) into the pipeline for replacement operation. Slowly pressurize to make the pressure in the pipeline rise slightly higher than the normal working pressure, open the diffusion valve, and closely observe the gas discharge condition of the diffusion port and the change of pressure gauge 1. During the replacement process, continuously fine-tune the manual pressure device to make the pipeline pressure stable and maintain between 12-15 kilopascal, ensuring the safety and efficiency of the replacement process. When the professional detection instrument confirms that the air in the pipeline has been fully replaced, and the pressure gauge 1 shows a stable value of about 13 kilopascal, close the diffusion valve, complete the indoor low-pressure pipeline replacement diffusion work, and ensure that the gas in the pipeline meets the safety standard.

[0068] Comparative example 2

[0069] Use simple pressure gauge and ordinary connection device for replacement diffusion. Simple pressure gauge range 0-50 kilopascal, accuracy 1 kilopascal, connection device poor sealing. In the replacement process, due to the poor sealing of the connection device, the pressure is unstable and difficult to control in the appropriate range. And because the pressure gauge has low accuracy, it cannot accurately determine whether the replacement is complete, resulting in poor replacement effect and possible residual air in the pipeline, which poses a safety hazard.

[0070] Example 3

[0071] Self-closing valve cut-off function test

[0072] Device settings: equipped with an electronic pressure gauge with a range of 10-50 kPa and an accuracy of 0.05 kPa as pressure gauge 1, which has data storage, real-time transmission and intelligent analysis functions, and can synchronize detection data to the monitoring terminal. The pressure gauge interface 2 and the four-way device 3 are designed with anti-loosening and anti-vibration connection to ensure stable and reliable connection under various working conditions. The four-way device main body 301 is made of lightweight high-strength aluminum alloy material, which reduces the overall weight of the device while ensuring its mechanical strength. The threaded interface 302 is designed as a quick plug-in type, which can quickly replace different specifications of threaded pipes, improving detection efficiency. Seven hose interfaces 303 are provided, and the sealing rubber ring of the clamp seal is made of special rubber that is resistant to high temperature and chemical corrosion, effectively preventing gas leakage. An electric pressure device is selected, which has multiple pressure modes and can be flexibly switched according to different detection needs, and has pressure overload protection and automatic pressure relief function to ensure safety during detection. The self-closing valve is installed at the key position where the pipeline to be detected is connected to the four-way device. When the pressure in the pipeline abnormally rises or falls beyond the set threshold, the electromagnetic drive device will quickly act to cut off the gas source. The self-closing valve is set to cut off the pressure at 25 kPa and 10 kPa.

[0073] Detection process: The self-closing valve on the gas pipeline of a commercial complex was tested for its cut-off function. After connecting the detection device to the pipeline system, the electric pressure device was started, and the fast pressure mode was selected to quickly raise the pipeline pressure to 25.5 kPa. At this time, the self-closing valve responded quickly, the electromagnetic drive device acted, the valve core closed quickly, and the gas source was successfully cut off, and the pressure gauge 1 stopped rising and started to drop. Then, the device was reconnected, the electric pressure device was started to stabilize the pressure at the normal working pressure (such as 15 kPa), and then the slow pressure reduction mode was switched to. When the pressure dropped to 9.5 kPa, the self-closing valve again accurately acted to cut off the gas source, and the pressure gauge 1 quickly dropped. Through these two tests, it is fully verified that the self-closing valve can accurately and timely cut off the gas source in abnormal pressure conditions, effectively ensuring the safety of gas use, and meeting the requirements of relevant safety standards.

[0074] Comparative Example 3

[0075] A local detection system based on a single pressure sensor was used to detect the same self-closing valve. The system sensor has an accuracy of 0.5 kPa and a range of 0-30 kPa, and can only monitor local pressure. When there is a small leak in other parts of the pipeline during detection, the system cannot accurately determine whether it is normal pressure fluctuation or abnormal condition that the self-closing valve should be cut off, resulting in misjudgment and ineffective detection of the self-closing valve cut-off function.

[0076] Example 4

[0077] Indoor alarm operation test

[0078] Device settings: select the range of 10-60 kilopascal intelligent pressure gauge as pressure gauge 1, the pressure gauge dial has high contrast display and night light function, it is convenient to read in different environments, at the same time, it has wireless data transmission function, it can be connected with mobile phone or computer terminal equipment. The connection thread of pressure gauge interface 2 and four-way device 3 is treated specially, which has good wear resistance and sealing performance. The four-way device main body 301 of four-way device 3 is made of copper alloy material, which has excellent heat conductivity and corrosion resistance. The threaded interface 302 can replace a variety of standard threaded pipes, which can meet the needs of various complex pipeline connection. Eight hose interfaces 303 are set, the clamp sealing adopts double sealing structure, the sealing rubber ring is made of high elasticity and wear-resistant material, which can ensure reliable sealing performance. The manual pressure device is selected, the pressure display part adopts digital display screen, which is intuitive and clear, the length of the operating rod can be adjusted to adapt to the use habits of different operators, and the overload protection device is provided to prevent damage of the equipment caused by misoperation. The indoor alarm adopts catalytic combustion type gas alarm, which is installed under the ceiling near the gas pipeline and gas equipment in the kitchen, and the alarm threshold of the alarm is set to 15% of the lower explosive limit of gas concentration.

[0079] Detection process: the alarm operation test is carried out in a resident's house. After connecting the detection device with the gas pipeline system, the manual pressure device is used to slowly pressurize the pipeline, simulate the gas leakage scene, make the pressure in the pipeline fluctuate slightly, and make a small amount of gas leak slowly (standard gas leakage simulator is used in actual detection). With the gas leakage, the indoor gas concentration gradually rises, when the gas concentration reaches the alarm threshold set by the alarm (15% of the lower explosive limit), the alarm immediately sends out a strong sound and light alarm signal, and pushes the alarm information to the mobile phone terminal connected therewith. In the alarm process, the pressure gauge 1 is closely observed to ensure that the pressure change is always within the safe range. The test result shows that the indoor alarm can operate normally, detect the gas leakage in time and effectively send out the alarm, which provides reliable protection for the life and property safety of residents.

[0080] Comparative example 4

[0081] The same indoor alarm is detected by using the chemical sensor detection method. The chemical sensor is easy to be disturbed by other gases in the environment, and the response time is long. In the simulation of gas leakage detection, due to the existence of other volatile gases in the room, the chemical sensor misjudges the gas leakage and sends out an error alarm signal, and cannot accurately judge the gas leakage concentration, so the detection result is unreliable.

[0082] From the above examples and comparative examples, it can be seen that the four-way gas leakage detection device has obvious advantages in detection accuracy, reliability, universality and operation convenience, and can effectively solve the problem of sealing detection of gas equipment and pipeline connection parts.

[0083] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference herein to any prior art is to be taken as an admission that the application is not entitled to antedate such prior art by virtue of prior application. Any reference to a "patent" or "patent document" is not intended as an admission that the patent or patent document is prior art with respect to the present application. Any reference to a document or other item of prior art is not intended as an admission that the document or item was at the priority date either known to be relevant to an issue on sale, novelty or non-obviousness under the patent laws or considered important to an invention covered by the application.

Claims

1. A component for testing the tightness of residential gas leaks using a safety device, characterized in that... include: The pressure gauge (1), pressure gauge interface (2), four-way device (3), expansion and contraction test device (4), and pressurizing device (5) are provided. The pressure gauge interface (2) is set below the pressure gauge (1). The pressure gauge interface (2) is connected to the four-way device (3). The pressure gauge (1) is connected to the four-way device (3) through the pressure gauge interface (2). The four-way device (3) includes: the four-way device body (301), four threaded interfaces (302) corresponding to the four-way, and multiple hose interfaces (303). The expansion and contraction test device (4) is used to test the safety of the self-closing valve and the alarm solenoid valve. The pressurizing device (5) is used to pressurize the components for testing.

2. The component for testing the safety device for residential gas tightness according to claim 1, characterized in that: The threaded interface (302) can be replaced with multiple standard threaded pipes as needed.

3. The component for testing the safety device for residential gas tightness as described in claim 1, characterized in that: The multiple hose interfaces (303) are set according to actual testing requirements.

4. The component for testing the safety device for residential gas tightness as described in any one of claims 1 or 3, characterized in that: The hose interface (303) is used to connect to the pipeline to be tested, the gas equipment to be tested, or the pressurization device.

5. A component for testing the tightness of residential gas leaks according to any one of claims 1 or 3, characterized in that: The hose interface (303) is used to connect the pipeline to be tested, the gas equipment to be tested, or the pressurization device. The sealing method adopted is clamp sealing.

6. The component for testing the safety device for residential gas tightness according to claim 4, characterized in that: The pressurizing device includes an electric pressurizing device or a manual pressurizing device.

7. The component for testing the safety device for residential gas tightness according to claim 1, characterized in that: The pressure gauge (1) and the four-way device (3) are connected by a threaded interface (302).

8. The component for testing the safety device for residential gas tightness according to claim 1, characterized in that: The expansion test device (4) is a series of expandable and interconnected air pipes.

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