A stainless steel corrugated hose for connecting gas appliances

Abstract

This application relates to a stainless steel corrugated flexible hose for connecting gas appliances, belonging to the technical field of gas transmission pipelines. It includes a pipe body with a connecting mechanism at one end. The pipe body is detachably connected to an adjacent pipe body via the connecting mechanism. The connecting mechanism includes a first connecting pipe, a second connecting pipe, a pressure sensor, a limiting component, and a pressure relief component. This application utilizes a pressure relief chamber formed by the sleeved connection of the first and second connecting pipes to temporarily store any gas that may leak at the pipe body connection, preventing direct leakage into the external environment.

Description

Technical Field

[0001] This application relates to the technical field of gas transmission pipelines, and in particular to a stainless steel corrugated hose for connecting gas appliances. Background Technology

[0002] During the use of gas appliances, the connecting hose is a key component for delivering gas from the pipeline to the appliance, and its performance directly affects the safety and reliability of gas use. Currently, the most common gas appliance connecting hoses on the market are mainly rubber hoses and traditional stainless steel corrugated hoses.

[0003] Although rubber hoses are inexpensive and flexible, they have obvious drawbacks: First, rubber is prone to aging and cracking or breakage after long-term use, leading to gas leaks and posing serious safety hazards. Second, rubber hoses have poor compressive strength and tensile strength, making them easily damaged when subjected to external impacts or pulling. Furthermore, their corrosion resistance is insufficient, significantly shortening their service life in harsh environments such as humidity and high temperatures.

[0004] Compared to rubber hoses, traditional stainless steel corrugated hoses offer improvements in strength and corrosion resistance. However, their sealing connection structure is simple, often employing a single sealing ring design, resulting in poor sealing performance. After prolonged use, gas leaks can easily occur due to aging of the sealing ring or loosening of the connection, leading to poor safety. Utility Model Content

[0005] In order to improve the sealing performance, safety performance and service life of gas appliance connection hoses and reduce the risk of gas leakage, this application provides a stainless steel corrugated hose for gas appliance connection.

[0006] This application provides a stainless steel corrugated flexible hose for connecting gas appliances, which adopts the following technical solution:

[0007] A stainless steel corrugated flexible hose for connecting gas appliances includes a hose body, with a connecting mechanism at one end of the hose body. The hose body is detachably connected to an adjacent hose body via the connecting mechanism. The connecting mechanism includes:

[0008] A first connecting pipe is disposed at the end of the pipe body;

[0009] The second connecting pipe is disposed at the end of the adjacent pipe body. The diameter of the second connecting pipe is larger than the diameter of the first connecting pipe. The second connecting pipe is sleeved on the outer wall of the first connecting pipe. A pressure relief cavity is provided between the first connecting pipe and the second connecting pipe.

[0010] A pressure sensor is disposed on the inner wall of the second connecting pipe;

[0011] A pressure display, which is disposed on the outer wall of the second connecting pipe and electrically connected to the air pressure sensor;

[0012] A limiting component is disposed on the pipe body and is used to limit the relative position of the first connecting pipe and the second connecting pipe when the first connecting pipe and the second connecting pipe are sleeved together.

[0013] A pressure relief assembly is disposed on the first connecting pipe and is used to maintain stable air pressure in the pressure relief chamber.

[0014] By adopting the above technical solution, the connecting mechanism at the pipe end enables detachable connection between adjacent pipes, facilitating installation and subsequent maintenance and replacement. The pressure relief chamber formed by the sleeved connection of the first and second connecting pipes can temporarily store any gas that may leak at the pipe connection point, preventing direct leakage into the external environment. A pressure sensor monitors the pressure changes within the pressure relief chamber in real time and transmits the data to a pressure display, allowing operators to visually understand the pressure situation and promptly detect potential leaks. The limiting component effectively restricts the relative position of the first and second connecting pipes, preventing loosening or detachment during use and ensuring connection stability. The pressure relief component can perform a pressure relief operation when the pressure within the pressure relief chamber is too high, maintaining stable pressure and preventing damage to the connection structure due to excessive pressure, further enhancing operational safety.

[0015] Optionally, the limiting component includes:

[0016] A limiting ring is provided on the outer wall of the first connecting ring, and a plurality of limiting holes are evenly distributed on the outer wall of the limiting ring;

[0017] The limiting ball is provided with a through hole that penetrates the side wall of the second connecting tube. The limiting ball is slidably installed in the through hole, and a part of the limiting ball can protrude out of the through hole.

[0018] The movable ring is slidably sleeved on the outer wall of the second connecting pipe. When the movable ring slides to the position of the closed through hole, the limiting ball protrudes out of the through hole under the action of the movable ring and engages with the connecting hole of the limiting ring.

[0019] A limiting spring is provided, one end of which is disposed on the outer wall of the second connecting pipe, and the other end of which is connected to a moving ring. The moving ring closes the through hole under the action of the limiting spring.

[0020] By adopting the above technical solution, when connecting the first connecting tube and the second connecting tube, the first connecting tube is inserted into the second connecting tube. At this time, the moving ring remains in a closed through-hole state under the elastic force of the limiting spring. Under the compression of the moving ring, the limiting ball partially protrudes from the through-hole and gets stuck in the limiting hole of the limiting ring, thus achieving relative fixation of the first connecting tube and the second connecting tube. The limiting effect is stable and reliable. When disassembly is required, the moving ring is pulled away from the limiting ball to compress the limiting spring, so that the moving ring no longer compresses the limiting ball. At this time, the limiting ball can be pushed out of the limiting hole, and then the first connecting tube can be pulled out from the second connecting tube. The operation is convenient and facilitates the disassembly, assembly, and maintenance of the hose.

[0021] Optionally, the pressure relief assembly is provided in four sets, and the four sets of pressure relief assemblies are evenly distributed on the outer wall of the first connecting pipe. The pressure relief assembly includes:

[0022] The first pressure relief box is located on the outer wall of the first connecting pipe, and a vent hole is provided on the top of the first pressure relief box;

[0023] The second pressure relief box is disposed on the outer side wall of the first connecting pipe and one end is connected to one side wall of the first pressure relief box in the horizontal direction.

[0024] A pressure relief pipe, one end of which is disposed on the outer wall of the second pressure relief box and communicates with the inside of the second pressure relief box, and the other end of which communicates with the inside of the first connecting pipe. A one-way valve is provided on the pressure relief pipe, and the one-way valve is directed to enter the inside of the first connecting pipe from the inside of the pressure relief pipe.

[0025] A pressure relief plate, which is vertically slidably disposed within a first pressure relief box;

[0026] A pressure relief spring is provided, with one end connected to the top wall of the first pressure relief box and the other end connected to a pressure relief plate. In its natural state, the pressure relief plate is held in the middle of the first pressure relief box by the action of the pressure relief spring. A pressure relief hole is provided on the side wall of the first pressure relief box and the second pressure relief box, which is located below the pressure relief plate.

[0027] By adopting the above technical solution, when gas leakage occurs in the pressure relief chamber, causing a rise in gas pressure, high-pressure gas enters the first pressure relief box and acts on the pressure relief plate. When the gas pressure reaches a certain value, the gas pressure overcomes the elastic force of the pressure relief spring, pushing the pressure relief plate downwards until it moves below the pressure relief hole. At this time, the first and second pressure relief boxes are connected through the pressure relief hole, and the leaked gas enters the second pressure relief box, then enters the first connecting pipe through the pressure relief pipe and the one-way valve, re-participating in gas transmission and reducing gas waste. When the gas pressure in the pressure relief chamber returns to normal, the pressure relief plate resets under the elastic force of the pressure relief spring, closing the pressure relief hole and ensuring the normal standby state of the pressure relief components. The four sets of pressure relief components are evenly distributed, ensuring uniform release of gas pressure in each area of ​​the pressure relief chamber, improving pressure relief efficiency and stability. The one-way valve prevents gas in the first connecting pipe from flowing back into the second pressure relief box, avoiding affecting normal gas transmission.

[0028] Optionally, a sealing ring is fitted on the outer wall of the limiting ring, and the sealing ring is tightly fitted to the inner wall of the second connecting pipe.

[0029] By adopting the above technical solution, the sealing ring can fill the gap between the limiting ring and the inner wall of the second connecting pipe, further enhancing the sealing performance at the connection between the first connecting pipe and the second connecting pipe, reducing the possibility of gas leaking from the connection to the pressure relief chamber, thereby reducing the workload of the subsequent pressure relief components, and also improving the sealing reliability of the entire hose connection structure, further ensuring the safety of gas use.

[0030] Optionally, the end of the first connecting pipe is provided with an inclined guide cone surface, the inclination angle of which is 30-45°.

[0031] By adopting the above technical solution, the guide cone surface can play a guiding role during the insertion of the first connecting pipe into the second connecting pipe, avoiding collision or jamming between the end of the first connecting pipe and the inner wall of the second connecting pipe, allowing the first connecting pipe to be inserted into the second connecting pipe more smoothly and improving installation efficiency. At the same time, the 30-45° tilt angle has been optimized to ensure a good guiding effect while avoiding the problems of reduced strength at the end of the first connecting pipe due to an excessively large angle, or insufficient guiding effect due to an excessively small angle, thus balancing installation convenience and structural strength.

[0032] Optionally, a warning light is provided on the outer wall of the second connecting pipe. The warning light is electrically connected to the air pressure sensor. When the air pressure sensor detects that the air pressure in the pressure relief chamber exceeds a preset threshold, the warning light will sound an alarm.

[0033] By adopting the above technical solution, when the gas pressure in the pressure relief chamber exceeds the preset threshold, it means that there may be a serious gas leak. At this time, the warning light will sound an alarm, which can promptly remind staff or users of potential dangers in a visual warning manner. Compared with simply displaying data through a pressure display, the alarm method of the warning light is more intuitive and eye-catching. Even in environments with a distance or low light, it can quickly attract attention, making it easier for relevant personnel to take emergency measures such as checking for leaks and shutting off gas valves in a timely manner, thereby further improving the level of safety protection.

[0034] Optionally, the pressure display is also connected to a wireless transmission module, which can transmit the real-time detected pressure data to the user's mobile APP or gas monitoring platform.

[0035] By adopting the above technical solutions, users can check the gas pressure in the pressure relief chamber at the hose connection anytime and anywhere via a mobile APP, and keep abreast of the equipment's operating status. The gas monitoring platform can centrally manage and monitor the pressure data of multiple gas appliance connection hoses in real time. When an abnormal gas pressure occurs, the platform can quickly locate the abnormal equipment and promptly notify maintenance personnel for handling. This achieves an upgrade from individual monitoring to centralized control, improving the management efficiency and response speed of gas safety, and is especially suitable for safety supervision in multiple gas appliance usage scenarios such as homes and commercial venues.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. The pressure relief chamber formed by the connection of the first connecting pipe and the second connecting pipe can temporarily store the gas that may leak at the pipe connection, preventing it from leaking directly into the external environment;

[0038] 2. The pressure sensor monitors the pressure changes in the pressure relief chamber in real time and transmits the data to the pressure display. The staff can intuitively understand the pressure in the pressure relief chamber through the pressure display and detect potential leaks in a timely manner.

[0039] 3. The warning light can visually alert staff or users to potential dangers. Compared to simply displaying data on a pressure monitor, the warning light is more intuitive and eye-catching. Even in environments with a distance or low light, it can quickly attract attention, allowing relevant personnel to take timely emergency measures such as checking for leaks and shutting off gas valves, thereby further improving the level of safety protection. Attached Figure Description

[0040] Figure 1 This is a three-dimensional structural diagram of this application;

[0041] Figure 2This is a structural schematic diagram of the connecting mechanism in this application, in which the sidewall of the second connecting pipe, the sidewall of the limiting ring, the sidewall of the first pressure relief box, and the second pressure relief box are all shown in cross section.

[0042] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0043] Reference numerals: 1. Pipe body; 2. Connecting mechanism; 21. First connecting pipe; 22. Second connecting pipe; 23. Pressure sensor; 24. Pressure display; 25. Limiting assembly; 26. Pressure relief assembly; 27. Pressure relief chamber; 31. Limiting ring; 32. Limiting ball; 33. Moving ring; 34. Limiting spring; 35. Guide cone surface; 41. First pressure relief box; 42. Second pressure relief box; 43. Pressure relief pipe; 44. One-way valve; 45. Pressure relief plate; 46. Pressure relief spring; 47. Pressure relief hole; 48. Warning light. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0045] This application discloses a stainless steel corrugated hose for connecting gas appliances.

[0046] Reference Figure 1 The stainless steel corrugated flexible hose for connecting gas appliances includes a hose body 1. The hose body 1 is made of stainless steel with a corrugated structure, which has good flexibility, pressure resistance and corrosion resistance, and can adapt to the bending requirements of different installation environments, while extending its service life. Both ends of the hose body 1 are fixedly installed with a connecting mechanism 2, which can realize the detachable connection between adjacent hose bodies 1, and can also realize the connection between the hose body 1 and the gas pipeline and gas appliance interface.

[0047] Reference Figure 1 and Figure 2 The connecting mechanism 2 includes a first connecting pipe 21, a second connecting pipe 22, a pressure sensor 23, a pressure display 24, a limiting component 25, and a pressure relief component 26. The first connecting pipe 21 is integrally formed at the end of the pipe body 1 and communicates with the interior of the pipe body 1. The second connecting pipe 22 is integrally formed at the end of the adjacent pipe body 1 and also communicates with the interior of the pipe body 1. The diameter of the second connecting pipe 22 is larger than the diameter of the first connecting pipe 21, so that the first connecting pipe 21 can be inserted into the second connecting pipe 22, and an annular pressure relief cavity 27 is formed between the two.

[0048] Reference Figure 2The pressure sensor 23 is bolted to the inner wall of the second connecting pipe 22, with its detection end facing the pressure relief chamber 27. The pressure sensor 23 is used to detect the pressure value inside the pressure relief chamber 27 in real time. The pressure display 24 is fixed to the outer wall of the second connecting pipe 22 with screws and is electrically connected to the pressure sensor 23 via a wire. The pressure display 24 can visually display the pressure data detected by the pressure sensor 23 in digital form, making it convenient for operators to view.

[0049] Reference Figure 1 and Figure 2 A limiting component 25 is disposed on the pipe body 1 and is used to limit the relative position of the first connecting pipe 21 and the second connecting pipe 22 when they are sleeved together. The limiting component 25 includes a limiting ring 31, a limiting ball 32, a moving ring 33, and a limiting spring 34. The limiting ring 31 is welded to the outer wall of the first connecting pipe 21 and is located at the end of the first connecting pipe 21 near the pipe body 1. Multiple limiting holes are evenly distributed along the circumferential direction on the outer wall of the limiting ring 31. A through hole is formed on the side wall of the second connecting pipe 22 corresponding to the position of the limiting hole. The limiting ball 32 is placed in the through hole. The diameter of the limiting ball 32 is slightly smaller than the diameter of the through hole, allowing it to slide freely within the through hole, and a portion of the limiting ball 32 can protrude outside the through hole.

[0050] Reference Figure 2 The movable ring 33 is slidably sleeved on the outer wall of the second connecting pipe 22, with its inner wall tightly fitted against the outer wall of the second connecting pipe 22. The movable ring 33 can slide axially along the second connecting pipe 22. The limiting spring 34 is sleeved on the outer wall of the second connecting pipe 22, with one end welded to the outer wall of the second connecting pipe 22 and the other end welded to the end face of the movable ring 33. In its natural state, the limiting spring 34 is in the extended state, pushing the movable ring 33 to slide to the position of the closed through hole. At this time, the inner wall of the movable ring 33 presses against the limiting ball 32, causing a part of the limiting ball 32 to protrude out of the through hole and be inserted into the limiting hole of the limiting ring 31, thereby achieving relative fixation between the first connecting pipe 21 and the second connecting pipe 22.

[0051] Reference Figure 2 A rubber sealing ring is fitted onto the outer wall of the limiting ring 31. The sealing ring is fixedly connected to the limiting ring 31 with adhesive. When the first connecting pipe 21 is inserted into the second connecting pipe 22, the sealing ring fits tightly against the inner wall of the second connecting pipe 22, filling the gap between them and enhancing the sealing performance. The end of the first connecting pipe 21 is provided with an inclined guide cone surface 35. The inclination angle of the guide cone surface 35 is 30-45°. The guide cone surface 35 plays a guiding role when the first connecting pipe 21 is inserted into the second connecting pipe 22, preventing the end from getting stuck.

[0052] Reference Figure 2 and Figure 3 Four sets of pressure relief components 26 are provided, and the four sets of pressure relief components 26 are evenly distributed on the outer side wall of the first connecting pipe 21 along the circumferential direction of the first connecting pipe 21. The pressure relief component 26 includes a first pressure relief box 41, a second pressure relief box 42, a pressure relief pipe 43, a one-way valve 44, a pressure relief plate 45, and a pressure relief spring 46. The first pressure relief box 41 and the second pressure relief box 42 are both fixed on the outer side wall of the first connecting pipe 21, and one end of the second pressure relief box 42 is fixed to one side wall of the first pressure relief box 41 in the horizontal direction.

[0053] Reference Figure 2 and Figure 3 The first pressure relief box 41 has a vent at its top, and the pressure relief assembly 26 is used to balance the air pressure inside the first pressure relief box 41 with that of the outside. A pressure relief hole 47 is provided on the side wall where the first pressure relief box 41 connects to the second pressure relief box 42. The pressure relief hole 47 is located at the lower part of the first pressure relief box 41, and the interiors of the first pressure relief box 41 and the second pressure relief box 42 are connected through the pressure relief hole 47. A pressure relief plate 45 is disposed inside the first pressure relief box 41, and its side wall is tightly fitted to the inner wall of the first pressure relief box 41. The pressure relief plate 45 can slide vertically along the height direction of the first pressure relief box 41. The pressure relief spring 46 is vertically installed inside the first pressure relief box 41. One end of the pressure relief spring 46 is welded to the inner top wall of the first pressure relief box 41, and the other end is welded to the upper surface of the pressure relief plate 45. In its natural state, the pressure relief spring 46 is in the extended state, supporting the pressure relief plate 45 in the middle position of the first pressure relief box 41. At this time, the pressure relief plate 45 is located above the pressure relief hole 47, blocking the pressure relief hole 47.

[0054] Reference Figure 3 One end of the pressure relief pipe 43 is welded to the outer wall of the second pressure relief box 42 and communicates with the inside of the second pressure relief box 42. The other end of the pressure relief pipe 43 is welded to the side wall of the first connecting pipe 21 and communicates with the inside of the first connecting pipe 21. A one-way valve 44 is installed on the pressure relief pipe 43, and its conduction direction is from the inside of the pressure relief pipe 43 to the inside of the first connecting pipe 21, preventing the gas in the first connecting pipe 21 from flowing back into the second pressure relief box 42.

[0055] Reference Figure 2 A warning light 48 is fixedly installed on the outer wall of the second connecting pipe 22 with screws. The warning light 48 is electrically connected to the pressure sensor 23 via a wire. When the pressure sensor 23 detects that the pressure in the pressure relief chamber 27 exceeds a preset threshold, the warning light 48 will emit a flashing red light to remind the staff of the risk of leakage. The pressure display 24 also integrates a wireless transmission module (such as a Bluetooth module or a GPRS module). The pressure display 24 can transmit the real-time detected pressure data to the user's mobile APP or gas monitoring platform via the wireless transmission module to achieve remote monitoring.

[0056] The working principle of this application embodiment is as follows:

[0057] When installing the hose, align the first connecting tube 21 at one end of one tube 1 with the second connecting tube 22 at the other end of one tube 1. Under the guidance of the guide cone surface 35, insert the hose into the second connecting tube 22. At this time, the limiting ring 31 squeezes the limiting ball 32 under the action of the limiting spring 34, so that the limiting ball 32 is inserted into the limiting hole of the limiting ring 31, thus completing the connection and fixation of the two tubes 1. The sealing ring enhances the sealing of the connection.

[0058] During use, if a gas leak occurs at the connection of pipe body 1, the leaked gas will enter the pressure relief chamber 27. The pressure sensor 23 monitors the pressure in the pressure relief chamber 27 in real time and transmits the data to the pressure display 24 for display. Simultaneously, it transmits the data wirelessly to a mobile app and a gas monitoring platform. When the pressure in the pressure relief chamber 27 increases, high-pressure gas enters the first pressure relief box 41, pushing the pressure relief plate 45 downwards and opening the pressure relief hole 47. The gas then enters the second pressure relief box 42 through the pressure relief pipe 43 and the one-way valve 44, flowing back to the first connecting pipe 21. If the pressure exceeds a preset threshold, the warning light 48 flashes, allowing staff to promptly investigate and handle the situation.

[0059] When it is necessary to disassemble the hose, pull the limiting ring 31 away from the limiting ball 32 to compress the limiting spring 34. The limiting ring 31 will no longer squeeze the limiting ball 32, and push the limiting ball 32 away from the limiting hole. Then the first connecting tube 21 can be pulled out from the second connecting tube 22 to complete the disassembly.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A stainless steel corrugated flexible hose for connecting gas appliances, characterized in that: Includes a pipe body (1), and a connecting mechanism (2) is provided at the end of the pipe body (1). The pipe body (1) is detachably connected to an adjacent pipe body (1) through the connecting mechanism (2). The connecting mechanism (2) includes: The first connecting pipe (21) is disposed at the end of the pipe body (1); The second connecting pipe (22) is disposed on the end of the adjacent pipe body (1). The diameter of the second connecting pipe (22) is larger than the diameter of the first connecting pipe (21). The second connecting pipe (22) is sleeved on the outer wall of the first connecting pipe (21). A pressure relief chamber (27) is provided between the first connecting pipe (21) and the second connecting pipe (22). A pressure sensor (23) is disposed on the inner wall of the second connecting pipe (22); Pressure display (24), which is disposed on the outer wall of the second connecting pipe (22) and electrically connected to the air pressure sensor (23); A limiting component (25) is disposed on the tube body (1) and is used to limit the relative position of the first connecting tube (21) and the second connecting tube (22) when the first connecting tube (21) and the second connecting tube (22) are sleeved together; Pressure relief assembly (26) is disposed on the first connecting pipe (21) and is used to maintain stable air pressure in the pressure relief chamber (27).

2. The stainless steel corrugated flexible hose for connecting gas appliances according to claim 1, characterized in that: The limiting component (25) includes: A limiting ring (31) is provided on the outer wall of the first connecting ring, and a plurality of limiting holes are evenly distributed on the outer wall of the limiting ring (31). The limiting ball (32) has a through hole that penetrates the side wall of the second connecting pipe (22). The limiting ball (32) is slidably installed in the through hole, and a part of the limiting ball (32) can protrude out of the through hole. The movable ring (33) is slidably sleeved on the outer wall of the second connecting pipe (22). When the movable ring (33) slides to the position of the closed through hole, the limiting ball (32) under the action of the movable ring (33) protrudes out of the through hole and engages with the connecting hole of the limiting ring (31). A limiting spring (34) is provided at one end on the outer wall of the second connecting pipe (22), and the other end of the limiting spring (34) is connected to the moving ring (33). The moving ring (33) closes the through hole under the action of the limiting spring (34).

3. A stainless steel corrugated flexible hose for connecting gas appliances according to claim 1, characterized in that: The pressure relief assembly (26) is provided in four sets, and the four sets of pressure relief assemblies (26) are evenly distributed on the outer wall of the first connecting pipe (21). The pressure relief assembly (26) includes: The first pressure relief box (41) is located on the outer wall of the first connecting pipe (21), and a vent hole is provided on the top of the first pressure relief box (41). The second pressure relief box (42) is located on the outer side wall of the first connecting pipe (21) and one end is connected to one side wall of the first pressure relief box (41) in the horizontal direction. A pressure relief pipe (43) is provided at one end on the outer wall of the second pressure relief box (42) and communicates with the inside of the second pressure relief box (42). The other end of the pressure relief pipe (43) is communicated with the inside of the first connecting pipe (21). A one-way valve (44) is provided on the pressure relief pipe (43). The conduction direction of the one-way valve (44) is that the inside of the pressure relief pipe (43) enters the inside of the first connecting pipe (21). Pressure relief plate (45), which is vertically slidably disposed within the first pressure relief box (41); A pressure relief spring (46) is provided. One end of the pressure relief spring (46) is connected to the inner top wall of the first pressure relief box (41), and the other end of the pressure relief spring (46) is connected to the pressure relief plate (45). In its natural state, the pressure relief plate (45) is held in the middle position of the first pressure relief box (41) under the action of the pressure relief spring (46). A pressure relief hole (47) is provided on the side wall of the first pressure relief box (41) connected to the second pressure relief box (42) to conduct the connection between the first pressure relief box (41) and the second pressure relief box (42). The pressure relief hole (47) is located below the pressure relief plate (45).

4. A stainless steel corrugated flexible hose for connecting gas appliances according to claim 2, characterized in that: A sealing ring is fitted on the outer wall of the limiting ring (31), and the sealing ring is tightly fitted to the inner wall of the second connecting pipe (22).

5. A stainless steel corrugated flexible hose for connecting gas appliances according to claim 1, characterized in that: The end of the first connecting pipe (21) is provided with an inclined guide cone surface (35), and the inclination angle of the guide cone surface (35) is 30-45°.

6. A stainless steel corrugated flexible hose for connecting gas appliances according to claim 1, characterized in that: A warning light (48) is provided on the outer wall of the second connecting pipe (22). The warning light (48) is electrically connected to the air pressure sensor (23). When the air pressure sensor (23) detects that the air pressure in the pressure relief chamber (27) exceeds the preset threshold, the warning light (48) issues an alarm.

7. A stainless steel corrugated flexible hose for connecting gas appliances according to claim 6, characterized in that: The pressure display (24) is also connected to a wireless transmission module, which can transmit the pressure data detected in real time to the user's mobile APP or gas monitoring platform.

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