Safe gas pipe and valve

Abstract

According to the safety gas pipe and the valve, the double-layer pipelines are adopted, low air pressure or high air pressure is formed between the double-layer pipelines by means of air exhaust or air inflation, when no leakage occurs in the two layers of pipelines, the formed low air pressure or high air pressure can be kept for a long time, and if any one of the two layers of pipelines leaks, the safety gas pipe is not damaged. The formed low-pressure value or high-pressure value is the same as or close to the external atmospheric pressure value, so that the driving part closes the ventilation pipeline or makes a sound to remind a user to check the air tightness of the pipeline under the elastic driving, the probability of high-flow or low-flow gas leakage can be effectively reduced, and the life and property safety of people is protected.

Description

Technical Field

[0001] This invention provides a safe gas pipe and valve, employing a double-layered pipe system. Low or high pressure is created between the two layers by evacuation or inflation. When neither layer leaks, the low or high pressure is maintained for a considerable time. If either layer leaks, the low or high pressure value will be the same as or close to the external atmospheric pressure. This triggers a flexible actuator to close the gas pipe or emit an audible warning to alert the user to check the pipe's airtightness. This effectively reduces the probability of large or small gas leaks, protecting people's lives and property. It is primarily used in gas or toxic gas transportation applications or where high pipe sealing is required, and is particularly suitable for gas stoves, gas water heaters, and other appliances that utilize gas. Background Technology

[0002] Currently, gas leaks are frequent due to aging gas hoses and rodent chewing. To address this issue, a valve that automatically shuts off during high-flow leaks has been introduced to the market. However, this doesn't solve the problem of low-flow leaks, which are more insidious and extremely dangerous. To solve this problem, a safe gas pipe and valve are proposed that can effectively reduce the probability of both high and low-flow gas leaks. This system uses a double-layer pipe, with low or high pressure created between the two layers by evacuation or inflation. When neither layer leaks, the low or high pressure remains for a relatively long time. If either layer leaks, the low or high pressure will be the same as or close to the external atmospheric pressure. This triggers a flexible actuator to close the gas pipe or emit an audible warning to alert the user to check the pipe's tightness, thus reducing the likelihood of gas leaks. Summary of the Invention

[0003] This invention provides a safe gas pipe and valve, employing a double-layered pipe system. Low or high pressure is created between the two layers by evacuation or inflation. When neither layer leaks, the low or high pressure is maintained for a considerable time. If either layer leaks, the low or high pressure will be equal to or close to the external atmospheric pressure. This triggers a flexible actuator to close the vent or emit an audible warning to alert the user to check the pipe's tightness, effectively reducing the likelihood of leaks, whether large or small flow rates. The system primarily includes: an air inlet; a first vent hole; and a second... Vent; elastic diaphragm; upper end of slide rod; spring; air nozzle; first cavity; piston; cylinder; outer outlet pipe; inner outlet pipe; outer hose pipe; inner hose pipe; cylindrical sound generator; cylindrical raised cylinder; perforated cylinder; elastic sheet; lower perforated cylinder; third vent; first perforated baffle; baffle plate; vent pipe; second perforated baffle; lower end of slide rod, characterized in that: the air inlet is connected to the rear end of a combustible gas supply pipe or a pressure reducing valve; the upper end and lower end of slide rod are integrally formed with a first vent between them; the piston is fixed to the upper end of slide rod; one end of the elastic diaphragm is fixed to the upper end of slide rod; and the other end of the elastic diaphragm is connected to the cylinder. The outer gas outlet pipe connects to the outer hose, and the inner gas outlet pipe connects to the inner hose. The outer and inner hoses are bonded together at the ends closest to the gas stove or gas water heater. Particles are filled between the outer and inner hoses, adhering to either the outer or inner hose to prevent them from sticking together completely over time. The outer, inner, and inner hoses together form the first cavity. When air is drawn from the gas nozzle, the pressure in the first cavity is lower than the external air pressure. If neither the outer nor inner hose is damaged or leaking, the gas pressure under the piston will be greater than the pressure above it. The plug moves upward, causing the upper and lower ends of the slide rod to move upward as well. At the same time, the spring is compressed upward, and the first vent hole enters the vent pipe. At this time, the gas enters the air inlet and is supplied to the outside through the first vent hole. If the outer or inner tube of the hose leaks, gas or outside air enters the first cavity, making the air pressure in the first cavity almost the same as the outside air pressure. The compressed spring drives the upper and lower ends of the slide rod to move downward, so that the first vent hole is no longer between the vent pipes. After the gas enters the air inlet, it cannot pass through the first vent hole, and the supply of gas to the outside stops, which reduces the probability of gas leakage problems caused by gas hose leakage.

[0004] When the gas nozzle is filled, the pressure in the first cavity is higher than the external air pressure. If neither the outer nor inner tube of the hose is damaged or leaking, the gas pressure under the piston will be lower than the pressure above it. The piston will move downwards, causing the upper and lower ends of the sliding rod to move downwards, simultaneously stretching the spring. At the same time, the first vent hole enters the vent pipe, and the gas enters the air inlet and is supplied to the outside through the first vent hole. If the outer or inner tube of the hose leaks, the gas in the first cavity will be released to the outside through the leak, making the pressure in the first cavity almost the same as the external air pressure. The stretched spring will drive the upper and lower ends of the sliding rod to move upwards, so that the first vent hole is no longer between the vent pipes. After the gas enters the air inlet, it cannot pass through the first vent hole, stopping the supply of gas to the outside. This reduces the probability of gas leaks caused by leaks in the gas hose.

[0005] The perforated cylinder is bonded to the outer periphery of the outer tube and the inner wall of the inner tube of the flexible hose. An elastic plate is installed on the perforated cylinder or on the outer surface of the lower perforated cylinder. A baffle is installed on the elastic plate, ensuring that the upper end of the baffle is always in contact with the inner wall of the inner tube. The outer tube is made of a harder material, while the inner tube is softer and more elastic. The space between the outer and inner tubes is filled with an elastic and breathable material, or not. The air inlet ends of the outer and inner tubes, away from the gas stove or gas water heater, are bonded together. If not bonded, the outer outlet tube is connected to the outer tube, and the inner outlet tube is connected to the inner tube. Air is drawn from the nozzle. The air pressure in the cavity between the outer and inner tubes is lower than the external air pressure. If neither the outer nor inner tube is damaged or leaking, the upper inner wall of the inner tube moves upward under atmospheric pressure. The inner wall of the inner tube moves downward, and the baffle moves upward under the action of the elastic plate, moving away from the third vent. After the gas enters the air inlet end of the inner tube, it is supplied to the outside through the third vent. If the outer tube or the inner tube of the hose leaks, gas or air will enter the cavity between the outer tube and the inner tube. The inner tube of the hose will return to its original shape under its own elasticity or the elasticity of the breathable material between the cavities. That is, the upper inner wall of the inner tube moves downward and the lower inner wall moves upward. The baffle moves downward under the action of the elastic plate, blocking the third vent. After the gas enters the air inlet end of the inner tube, it cannot be supplied to the outside through the third vent, thus stopping the supply of gas to the outside. This prevents gas leakage caused by gas hose leakage. A section of the outer tube of the hose is fixedly installed with a rigid sleeve that cannot be bent to prevent the baffle from moving up and down due to pipe bending.

[0006] The air pressure in the cavity between the outer and inner tubes of the gas nozzle inflation hose is higher than the external air pressure. If neither the outer nor inner tube is damaged or leaking, the upper inner wall of the inner tube will move downwards and the lower inner wall will move upwards under atmospheric pressure. The baffle has a vent hole, and under the action of the elastic plate, the baffle moves downwards, making the vent hole on the baffle and the third vent hole at the same height. Gas enters the air inlet end of the inner tube, passes through the vent hole on the baffle, and then through the third vent hole to supply gas to the outside. If the soft... If the outer tube or inner tube of the flexible hose leaks, gas or air will enter the cavity between them. The inner tube will then return to its original shape due to its elasticity, with the upper inner wall moving upwards and the lower inner wall moving downwards. The baffle will move upwards under the action of the elastic plate. Since the vent hole and the third vent hole on the baffle are not at the same height, the gas entering the air inlet of the inner tube cannot reach the third vent hole and will stop supplying gas. This reduces the chance of gas leaks caused by gas hose leaks.

[0007] The air nozzle is installed on the outer tube of the hose or the outer tube of the air outlet.

[0008] A spherical, airtight object or a horizontally fixed, cylindrical, airtight object is fixed to the inner wall of the hose. Elastic material is filled between the outer and inner hoses. The air pressure in the first cavity when drawing air from the nozzle is lower than the external air pressure. If neither the outer nor inner hose is damaged or leaking, the upper inner wall of the inner hose will move upwards and the lower inner wall will move downwards under atmospheric pressure. Gas enters the inlet of the inner hose, passes through the surface of the fixed spherical or horizontally fixed, airtight object, and is then supplied externally. If either the outer or inner hose leaks, gas or air will enter. The cavity between the outer and inner tubes of the flexible hose allows the inner tube to return to its original shape under its own elasticity or the elasticity of the breathable material between the cavities. Specifically, the upper inner wall of the inner tube moves downwards, and the lower inner wall moves upwards. The upper and lower inner walls of the inner tube then contact the surface of a fixed spherical or horizontally fixed cylindrical impermeable object. After the gas enters the inlet end of the inner tube, it cannot pass through the surface of the fixed spherical or horizontally fixed cylindrical impermeable object, thus preventing gas from being supplied externally. This reduces the likelihood of gas leaks caused by leaking gas hoses.

[0009] The second perforated baffle is fixed to the outer periphery of the gas outlet inner pipe. When the slide rod formed by the upper and lower ends of the slide rod does not block the hole on the second perforated baffle, the gas enters from the air inlet and can supply gas to the outside through the hole on the second perforated baffle. When the slide rod formed by the upper and lower ends of the slide rod blocks the hole on the second perforated baffle, the gas enters from the air inlet and cannot supply gas to the outside through the hole on the second perforated baffle. The slide rod formed by the upper and lower ends of the slide rod is made of a hard material or an elastic material. If it is made of an elastic material, the slide rod formed by the upper and lower ends of the slide rod will be in close contact with the second perforated baffle under the gas pressure, resulting in better sealing. If it is made of a hard material, it is wrapped with an elastic material.

[0010] The baffle is made of either a hard or soft material. If it is made of a soft material, it will vibrate and make a sound. When the bottom of the baffle is close to the third vent, the bottom of the baffle will vibrate and make a sound when the gas is blown by the gas, reminding the user to check the sealing of the gas pipeline.

[0011] A cylindrical sound-generating element, such as a cylindrical whistle, is fixed to the inner wall of the flexible hose. A cylindrical support tube is installed in front of the sound-generating element. The outer diameter of the support tube is larger than that of the sound-generating element, and it has an internal hole. If the air outlet of the cylindrical sound-generating element is directly opposite the inner wall of the flexible hose, the larger outer diameter of the support tube prevents the inner wall of the flexible hose from blocking the air outlet of the cylindrical sound-generating element. Elastic material is filled between the outer and inner hoses. The air pressure in the first cavity when drawing air from the nozzle is lower than the external air pressure. If neither the outer nor inner hose is damaged or leaking, the upper inner wall of the inner hose moves upward and the lower inner wall moves downward under atmospheric pressure. After the gas enters the air inlet of the inner hose, it passes through the fixed outer surface of the cylindrical sound-generating element and is then supplied to the outside. The gas does not enter the cylindrical sound-generating element. If a small amount of gas or air enters the interior of a cylindrical sound-generating device, the device will not be able to produce sound. If the outer or inner tube of the flexible hose leaks, gas or air will enter the cavity between them. The inner tube will then return to its original shape due to its own elasticity or the elasticity of the breathable material between the cavities. This means the upper inner wall of the inner tube will move downwards and the lower inner wall will move upwards. The upper and lower inner walls of the inner tube will then contact the surface of the cylindrical support tube or the outer surface of the cylindrical sound-generating device. Gas can only enter the hole of the cylindrical support tube and then the cylindrical sound-generating device, which will then emit a sound to remind the user to check the airtightness of the pipeline, thus reducing the chance of gas leaks caused by leaking gas hoses.

[0012] The elastic diaphragm is installed above or below the piston. If there is air leakage between the piston and the cylinder, the elastic diaphragm acts as a seal. Attached Figure Description To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings will be described below.

[0013] Figure 1 This is a front view of the cross-sectional structure of the present invention.

[0014] In the diagram: 1. Air inlet; 2. First vent; 3. Second vent; 4. Elastic membrane; 5. Upper end of slide rod; 6. Spring; 7. Air nozzle; 8. First cavity; 9. Piston; 10. Cylinder; 11. Outer air pipe; 12. Inner air pipe; 13. Outer hose pipe; 14. Inner hose pipe; 15. Cylindrical sound generator; 16. Cylindrical raised cylinder; 17. Perforated cylinder; 18. Elastic sheet; 19. Lower perforated cylinder; 20. Third vent; 21. First perforated baffle; 22. Baffle plate; 23. Vent pipe; 24. Second perforated baffle; 25. Lower end of slide rod. Detailed Implementation

[0015] The present invention will now be further described with reference to the accompanying drawings: The air inlet 1 is connected to the combustible gas supply pipe or the rear end of the pressure reducing valve. The upper end 5 and the lower end 25 of the slide rod are integrated, with a first vent hole 2 between them. The piston 9 is fixed to the upper end 5 of the slide rod. One end of the elastic diaphragm 4 is fixed to the upper end 5 of the slide rod, and the other end of the elastic diaphragm 4 is connected to the cylinder 10. The outer outlet pipe 11 is connected to the outer hose pipe 13, and the inner outlet pipe 12 is connected to the inner hose pipe 14. The outer hose pipe 13 and the inner hose pipe 14 are bonded together at the ends near the gas stove or gas water heater. The space between the outer hose pipe 13 and the inner hose pipe 14 is filled with particulate matter, which adheres to the outer hose pipe 13 or the inner hose pipe 14 to prevent them from sticking together completely after prolonged contact. The outer outlet pipe 11, the inner outlet pipe 12, the outer hose pipe 13, and the inner hose pipe 14 together form the first cavity 8. Air is drawn from the first cavity by the gas nozzle 7. The air pressure in cavity 8 is lower than the external air pressure. If neither the outer tube 13 nor the inner tube 14 of the hose is damaged or leaking, the gas pressure under piston 9 will be greater than the air pressure above it. Piston 9 will move upward, causing the upper end 5 and the lower end 25 of the slide rod to move upward, compressing spring 6 at the same time. Simultaneously, the first vent hole 2 enters the vent pipe 23. At this time, the gas enters the air inlet 1 and supplies gas to the outside through the first vent hole 2. If the outer tube 13 or the inner tube 14 of the hose leaks, the gas or external air enters the first cavity 8, making the air pressure in the first cavity 8 almost the same as the external air pressure. The compressed spring 6 drives the upper end 5 and the lower end 25 of the slide rod to move downward, so that the first vent hole 2 is no longer between the vent pipe 23. After the gas enters the air inlet 1, it cannot pass through the first vent hole 2, stopping the external gas supply and reducing the probability of gas leakage caused by gas hose leakage.

[0016] When the gas pressure in the first cavity 8 of the gas nozzle 7 is higher than the external air pressure, if neither the outer tube 13 nor the inner tube 14 of the hose is damaged or leaking, the gas pressure under the piston 9 will be lower than the pressure above it. The piston 9 will move downward, causing the upper end 5 and the lower end 25 of the slide rod to move downward, while simultaneously stretching the spring 6 downward. At the same time, the first vent hole 2 enters the vent pipe 23. At this time, the gas enters the air inlet 1 and supplies gas to the outside through the first vent hole 2. If the outer tube 13 and the inner tube 14 of the hose leak, the gas in the first cavity 8 will be released to the outside through the leak, making the gas pressure in the first cavity 8 almost the same as the external air pressure. The stretched spring 6 will drive the upper end 5 and the lower end 25 of the slide rod to move upward, so that the first vent hole 2 is no longer between the vent pipe 23. After the gas enters the air inlet 1, it cannot pass through the first vent hole 2, stopping the external gas supply and reducing the probability of gas leakage caused by gas hose leakage.

[0017] The perforated cylinder 17 is bonded to the outer periphery of the inner tube 14 of the flexible hose. An elastic plate 18 is mounted on the perforated cylinder 17 or on the outer surface of the lower perforated cylinder 19. A baffle 22 is mounted on the elastic plate 18, ensuring that the upper end of the baffle 22 is always in contact with the inner wall of the inner tube 14. The outer tube 13 is made of a harder material, while the inner tube 14 is softer and more elastic. The space between the outer tube 13 and the inner tube 14 is filled with an elastic and breathable material, or not filled with an elastic and breathable material. The air inlet ends of the outer tube 13 and the inner tube 14 of the flexible hose, which are furthest from the gas stove or gas water heater, are glued together. If they are not glued together, the outer tube 11 is connected to the outer tube 13, and the inner tube 12 is connected to the inner tube 14. When air is drawn from the gas nozzle 7, the air pressure in the cavity between the outer tube 13 and the inner tube 14 is lower than the external air pressure. If neither the outer tube 13 nor the inner tube 14 is damaged or leaking, the upper inner wall of the inner tube 14 will be under atmospheric pressure. As the hose moves upward, the lower inner wall of the inner tube 14 moves downward, and the baffle 22 moves upward under the action of the elastic plate 18. The baffle 22 moves away from the third vent 20. After the gas enters the air inlet end of the inner tube 14, it is supplied to the outside through the third vent 20. If the outer tube 13 or the inner tube 14 of the hose leaks, gas or air will enter the cavity between the outer tube 13 and the inner tube 14. The inner tube 14 will return to its original shape under its own elasticity or the elasticity of the breathable material between the cavities. The upper inner wall of the inner tube 14 moves downward, the lower inner wall of the inner tube 14 of the hose moves upward, and the baffle 22 moves downward under the action of the elastic plate 18. The baffle 22 blocks the third vent hole 20. After the gas enters the air inlet end of the inner tube 14 of the hose, it cannot supply gas to the outside through the third vent hole 20, and the gas supply to the outside stops, which prevents gas leakage caused by gas hose leakage. A section of the outer tube 13 of the hose is fixedly installed with a rigid sleeve that cannot be bent to prevent the baffle 22 from moving up and down due to pipe bending.

[0018] The air pressure in the cavity between the outer tube 13 and the inner tube 14 of the air inlet hose is higher than the external air pressure. If neither the outer tube 13 nor the inner tube 14 is damaged or leaking, the upper inner wall of the inner tube 14 moves downward and the lower inner wall moves upward under atmospheric pressure. The baffle 22 has a vent hole, and under the action of the elastic plate 18, the baffle 22 moves downward, so that the vent hole on the baffle 22 is at the same height as the third vent hole 20. After the gas enters the air inlet end of the inner tube 14, it passes through the vent hole on the baffle 22 and then through the third vent hole 20 to supply gas to the outside. If the outer tube 13 or the inner tube 14 of the hose leaks, gas or air will enter the cavity between the outer tube 13 and the inner tube 14. The inner tube 14 will return to its original shape under its own elasticity, that is, the upper inner wall of the inner tube 14 will move upward and the lower inner wall will move downward. The baffle 22 will move upward under the action of the elastic plate 18. The vent hole on the baffle 22 and the third vent hole 20 will not be at the same height. After the gas enters the air inlet end of the inner tube 14, it will not be able to reach the third vent hole 20 and will stop supplying gas to the outside, thereby reducing the probability of gas leakage problems caused by gas hose leakage.

[0019] The air nozzle 7 is installed on the outer tube 13 of the hose or on the outer air outlet tube 11.

[0020] A spherical, airtight object or a horizontally fixed cylindrical, airtight object is fixedly installed on the inner wall of the inner tube 14 of the hose. Elastic material is filled between the outer tube 13 and the inner tube 14. The air pressure in the first cavity 8 of the gas nozzle 7 is lower than the external air pressure. If neither the outer tube 13 nor the inner tube 14 is damaged or leaking, the upper inner wall of the inner tube 14 moves upward and the lower inner wall moves downward under atmospheric pressure. Gas enters the inlet end of the inner tube 14, passes through the surface of the fixed spherical or horizontally fixed cylindrical airtight object, and is then supplied externally. If the outer tube 13 or the inner tube 14 leaks, the gas or air... Gas enters the cavity between the outer tube 13 and the inner tube 14 of the hose. Under its own elasticity or the elasticity of the breathable material between the cavities, the inner tube 14 returns to its original shape. That is, the upper inner wall of the inner tube 14 moves down and the lower inner wall moves up. The upper and lower inner walls of the inner tube 14 come into contact with the surface of a fixed spherical impermeable object or a horizontally fixed cylindrical impermeable object. After the gas enters the inlet end of the inner tube 14, it cannot pass through the surface of the fixed spherical impermeable object or the horizontally fixed cylindrical impermeable object, and cannot supply gas to the outside. This reduces the probability of gas leakage caused by gas hose leakage.

[0021] The second perforated baffle 24 is fixed to the outer periphery of the gas outlet inner pipe 12. When the slide rod formed by the upper end 5 and the lower end 25 of the slide rod does not block the hole on the second perforated baffle 24, the gas enters from the inlet 1 and can supply gas to the outside through the hole on the second perforated baffle 24. When the slide rod formed by the upper end 5 and the lower end 25 of the slide rod blocks the hole on the second perforated baffle 24, the gas enters from the inlet 1 and cannot supply gas to the outside through the hole on the second perforated baffle 24. The slide rod formed by the upper end 5 and the lower end 25 of the slide rod is made of hard material or elastic material. If it is made of elastic material, the slide rod formed by the upper end 5 and the lower end 25 of the slide rod will be in close contact with the second perforated baffle 24 under the gas pressure, and the sealing performance is better. If it is made of hard material, it is wrapped with an elastic material.

[0022] The baffle 22 is made of hard or soft material. If it is made of soft material, it will vibrate and make a sound. When the bottom of the baffle 22 is close to the third vent 20, the bottom of the baffle 22 will vibrate and make a sound under the blowing of gas, reminding the user to check the sealing of the gas pipeline.

[0023] A cylindrical sound-generating body 15, such as a cylindrical whistle, is fixed to the inner wall of the inner tube 14 of the flexible hose. A cylindrical support tube 16 is installed in front of the cylindrical sound-generating body 15. The outer diameter of the cylindrical support tube 16 is larger than that of the cylindrical sound-generating body 15, and it has an internal hole. If the air outlet of the cylindrical sound-generating body 15 is directly opposite the inner wall of the inner tube 14 of the flexible hose, the larger outer diameter of the cylindrical support tube 16 can prevent the inner wall of the inner tube 14 from blocking the air outlet of the cylindrical sound-generating body 15. The outer tube 13 of the flexible hose... Elastic material is filled between the outer tube 13 and the inner tube 14 of the hose. The air pressure in the first cavity 8 of the air nozzle 7 is lower than the external air pressure. If neither the outer tube 13 nor the inner tube 14 of the hose is damaged or leaking, the upper inner wall of the inner tube 14 moves upward and the lower inner wall moves downward under atmospheric pressure. After the gas enters the air inlet end of the inner tube 14, it passes through the outer surface of the fixed cylindrical sound generator 15 and is then supplied to the outside. If gas or air enters the interior of the cylindrical sound emitter 15, or even a small amount enters the interior of the cylindrical sound emitter 15, the cylindrical sound emitter 15 will not be able to produce sound. If the outer tube 13 or the inner tube 14 of the hose leaks, gas or air will enter the cavity between the outer tube 13 and the inner tube 14. Under its own elasticity or the elasticity of the elastic breathable material between the cavities, the inner tube 14 will return to its original shape. That is, the upper inner wall of the inner tube 14 will move down and the lower inner wall of the inner tube 14 will move up. The upper inner wall and the lower inner wall of the inner tube 14 will contact the surface of the cylindrical support cylinder 16 or the outer surface of the cylindrical sound emitter 15. Gas can only enter the hole of the cylindrical support cylinder 16 and then enter the cylindrical sound emitter 15. The cylindrical sound emitter 15 will emit a sound to remind the user to check the airtightness of the pipeline, thereby reducing the probability of gas leakage problems caused by gas hose leaks.

[0024] The elastic diaphragm 4 is installed above or below the piston 9. If there is air leakage between the piston 9 and the cylinder 10, the elastic diaphragm 4 will act as a seal.

[0025] The air pump or vacuum pump that comes with the air nozzle 7 is installed on the outer tube 13 of the hose or the outer tube 11 of the air outlet. If the user needs to pump or inflate the air multiple times in a short period of time during use, it means that the airtightness of the entire pipeline needs to be checked or the entire pipeline needs to be replaced.

[0026] The leaks described above include both large-volume gas leaks and small-volume leaks.

[0027] The elastic materials described above include: rubber, polyurethane elastomers, thermoplastic polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, and other elastomers.

[0028] The soft materials described above include: rubber, polytetrafluoroethylene, polyvinylidene fluoride, perfluoroalkoxyalkane, fluorinated ethylene propylene copolymer, polyethylene, polypropylene, polyether ether ketone, thermoplastic polyurethane and other flexible polymers.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the present invention.

Claims

1. A safety gas pipe and valve, mainly comprising: Air inlet (1); first vent (2); second vent (3); elastic membrane (4); upper end of slide rod (5); spring (6); air nozzle (7); first cavity (8); piston (9); cylinder (10); outer outlet pipe (11); inner outlet pipe (12); outer hose pipe (13); inner hose pipe (14); cylindrical sound generator (15); cylindrical raised cylinder (16); perforated cylinder (17); elastic sheet (18); lower perforated cylinder (19); third vent (20); first perforated baffle (21); baffle plate (22); vent pipe (23); second perforated baffle (24); lower end of slide rod (25), characterized in that At: the air inlet (1) is connected to the gas supply pipe or the rear end of the pressure reducing valve. The upper end (5) and the lower end (25) of the slide rod are a whole, with a first vent hole (2) between them. The piston (9) is fixed on the upper end (5) of the slide rod. One end of the elastic membrane (4) is fixed on the upper end (5) of the slide rod, and the other end of the elastic membrane (4) is connected to the cylinder (10). The outer outlet pipe (11) is connected to the outer hose pipe (13), and the inner outlet pipe (12) is connected to the inner hose pipe (14). The outer hose pipe (13) and the inner hose pipe (14) are bonded together at the end near the gas stove or gas water heater. The space between the outer hose pipe (13) and the inner hose pipe (14) is filled with particulate matter. Particles adhere to the outer tube (13) or inner tube (14) of the hose, preventing the outer tube (13) and inner tube (14) from sticking together completely after prolonged contact. The outer tube (11), inner tube (12), outer tube (13), and inner tube (14) together form the first cavity (8). When the air nozzle (7) draws air, the air pressure in the first cavity (8) is lower than the air pressure of the outside air. If neither the outer tube (13) nor the inner tube (14) is damaged or leaking, the gas pressure under the piston (9) will be greater than the air pressure above it. The piston (9) will move upward, causing the upper end (5) and lower end (25) of the slide rod to move upward, while simultaneously compressing the spring upward. 6) At the same time, the first vent (2) enters the vent pipe (23). At this time, the gas enters the air inlet (1) and supplies gas to the outside through the first vent (2). If the outer tube (13) and inner tube (14) of the hose leak, the gas or external air enters the first cavity (8) so that the air pressure in the first cavity (8) is almost the same as the air pressure in the outside. The compressed spring (6) drives the upper end (5) and the lower end (25) of the slide rod to move downward so that the first vent (2) is not between the vent pipe (23). After the gas enters the air inlet (1), it cannot pass through the first vent (2) and stops supplying gas to the outside, thereby reducing the probability of gas leakage caused by gas hose leakage.

2. The safety gas pipe and valve according to claim 1, characterized in that: When the air pressure in the first cavity (8) of the gas nozzle (7) is higher than the external air pressure, if neither the outer tube (13) nor the inner tube (14) of the hose is damaged or leaking, the gas pressure under the piston (9) will be lower than the pressure above it, and the piston (9) will move downward, causing the upper end (5) and lower end (25) of the slide rod to move downward, while simultaneously pulling the spring (6) downward. At the same time, the first vent (2) enters the vent pipe (23), and the gas enters the air inlet (1) and is supplied to the outside through the first vent (2). If the hose If the outer tube (13) and the inner tube (14) of the hose leak, the gas in the first cavity (8) will be released to the outside through the leak, making the air pressure in the first cavity (8) almost the same as the outside air pressure. The stretched spring (6) drives the upper end (5) and the lower end (25) of the slide rod to move upward, so that the first vent (2) is not between the vent pipe (23). After the gas enters the air inlet (1), it cannot pass through the first vent (2), and the gas supply to the outside stops, which reduces the probability of gas leakage caused by gas hose leakage.

3. The safe gas pipe and valve according to claim 1, characterized in that: The perforated cylinder (17) is bonded to the outer periphery of the inner tube (14) of the flexible hose. An elastic plate (18) is installed on the perforated cylinder (17) or on the outer surface of the lower perforated cylinder (19). A baffle (22) is installed on the elastic plate (18), and the elastic plate (18) ensures that the upper end of the baffle (22) is always in contact with the inner wall of the inner tube (14) of the flexible hose. The outer tube (13) of the flexible hose is made of a harder material, while the inner tube (14) of the flexible hose is made of a softer and more elastic material. The space between the outer tube (13) and the inner tube (14) of the flexible hose is filled with an elastic and breathable material or not filled with an elastic and breathable material. The air inlet ends of the outer hose (13) and the inner hose (14) are respectively connected together, away from the gas stove or gas water heater. If they are not connected together, the outer outlet hose (11) is connected to the outer hose (13), and the inner outlet hose (12) is connected to the inner hose (14). Air is drawn through the gas nozzle (7). The air pressure in the cavity between the outer hose (13) and the inner hose (14) is lower than the air pressure outside. If neither the outer hose (13) nor the inner hose (14) is damaged or leaking, the inner hose (14) will be under atmospheric pressure. The upper inner wall moves upward, the lower inner wall of the inner tube (14) moves downward, and the baffle (22) moves upward under the action of the elastic plate (18). The baffle (22) moves away from the third vent (20). After the gas enters the air inlet end of the inner tube (14), it supplies gas to the outside through the third vent (20). If the outer tube (13) or the inner tube (14) of the hose leaks, gas or air will enter the cavity between the outer tube (13) and the inner tube (14). The inner tube (14) of the hose will return to its original shape under its own elasticity or under the elasticity of the elastic breathable material between the cavities. The inner wall of the upper side of the inner tube (14) of the hose moves down and the inner wall of the lower side of the inner tube (14) moves up. The baffle (22) moves down under the action of the elastic plate (18). The baffle (22) blocks the third vent (20). After the gas enters the air inlet end of the inner tube (14) of the hose, it cannot supply gas to the outside through the third vent (20), and the gas supply to the outside stops. This prevents gas leakage caused by gas hose leakage. A rigid sleeve that cannot be bent is fixedly installed on a certain section of the outer tube (13) of the hose to prevent the baffle (22) from moving up and down due to pipe bending.

4. A safe gas pipe and valve according to claim 1, characterized in that: The air pressure in the cavity between the outer tube (13) and the inner tube (14) of the air inlet (7) is higher than the external air pressure. If neither the outer tube (13) nor the inner tube (14) is damaged or leaking, the upper inner wall of the inner tube (14) moves downward and the lower inner wall moves upward under atmospheric pressure. There is a vent hole on the baffle (22). The baffle (22) moves downward under the action of the elastic plate (18), so that the vent hole on the baffle (22) and the third vent hole (20) are at the same height. After the gas enters the air inlet end of the inner tube (14), it passes through the vent hole on the baffle (22) and then through the third vent hole (20) to the outside. If the outer tube (13) or inner tube (14) of the hose leaks gas, gas or air will enter the cavity between the outer tube (13) and the inner tube (14). The inner tube (14) will return to its original shape under its own elasticity, that is, the upper inner wall of the inner tube (14) moves up and the lower inner wall of the inner tube (14) moves down. The baffle (22) moves up under the action of the elastic plate (18). The vent hole on the baffle (22) and the third vent hole (20) are not at the same height. After the gas enters the air inlet end of the inner tube (14), it cannot reach the third vent hole (20) and stops supplying gas to the outside, thereby reducing the probability of gas leakage caused by gas hose leakage.

5. A safe gas pipe and valve according to claim 1, characterized in that: The air nozzle (7) is installed on the outer tube (13) of the hose or on the outer tube (11) of the air outlet.

6. A safe gas pipe and valve according to claim 1, characterized in that: A spherical impermeable object or a horizontally fixed cylindrical impermeable object is fixedly installed on the inner wall of the inner tube (14) of the hose. Elastic material is filled between the outer tube (13) and the inner tube (14) of the hose. The air pressure in the first cavity (8) of the air nozzle (7) is lower than the air pressure of the outside air. If neither the outer tube (13) nor the inner tube (14) of the hose is damaged or leaking, the upper inner wall of the inner tube (14) of the hose moves upward and the lower inner wall moves downward under the action of atmospheric pressure. After the gas enters the air inlet end of the inner tube (14), it passes through the surface of the fixed spherical impermeable object or the horizontally fixed cylindrical impermeable object and then supplies gas to the outside. If the outer tube (13) or the inner tube (14) of the hose leaks gas... Gas or air will enter the cavity between the outer tube (13) and the inner tube (14) of the hose. Under its own elasticity or the elasticity of the elastic breathable material between the cavities, the inner tube (14) will return to its original shape. That is, the upper inner wall of the inner tube (14) will move down and the lower inner wall of the inner tube (14) will move up. The upper inner wall and the lower inner wall of the inner tube (14) will contact the surface of a fixed spherical impermeable object or a horizontally fixed cylindrical impermeable object. After the gas enters the air inlet end of the inner tube (14), it cannot pass through the surface of the fixed spherical impermeable object or the horizontally fixed cylindrical impermeable object, and cannot supply gas to the outside. This reduces the probability of gas leakage caused by gas hose leakage.

7. A safe gas pipe and valve according to claim 1, characterized in that: The second perforated baffle (24) is fixed on the outer periphery of the gas outlet inner pipe (12). When the slide rod formed by the upper end (5) and the lower end (25) of the slide rod does not block the hole on the second perforated baffle (24), the gas enters from the inlet (1) and can supply gas to the outside through the hole on the second perforated baffle (24). When the slide rod formed by the upper end (5) and the lower end (25) of the slide rod blocks the hole on the second perforated baffle (24), the gas enters from the inlet (1) and cannot supply gas to the outside through the hole on the second perforated baffle (24). The slide rod formed by the upper end (5) and the lower end (25) of the slide rod is made of hard material or elastic material. If it is made of elastic material, the slide rod formed by the upper end (5) and the lower end (25) of the slide rod will be in close contact with the second perforated baffle (24) under the gas pressure, and the sealing performance is better. If it is made of hard material, an elastic material is wrapped around the outside.

8. A safe gas pipe and valve according to claim 1, characterized in that: The baffle (22) is made of hard or soft material. If it is made of soft material, it will vibrate and make a sound. When the bottom of the baffle (22) is close to the third vent (20), the bottom of the baffle (22) vibrates and makes a sound under the blowing of gas, reminding the user to check the sealing of the gas pipeline.

9. A safe gas pipe and valve according to claim 1, characterized in that: A cylindrical sound-generating body (15), such as a cylindrical whistle, is fixed to the inner wall of the inner tube (14) of the flexible hose. A cylindrical shim (16) is installed in front of the cylindrical sound-generating body (15). The outer diameter of the cylindrical shim (16) is larger than that of the cylindrical sound-generating body (15), and it has a hole inside. If the air outlet of the cylindrical sound-generating body (15) is directly facing the inner wall of the inner tube (14) of the flexible hose, the large outer diameter of the cylindrical shim (16) can prevent the inner wall of the inner tube (14) of the flexible hose from blocking the air outlet of the cylindrical sound-generating body (15). Elastic material is filled between the outer tube (13) and the inner tube (14) of the hose. The air pressure in the first cavity (8) of the air nozzle (7) is lower than the air pressure of the outside air. If neither the outer tube (13) nor the inner tube (14) of the hose is damaged or leaking, the upper inner wall of the inner tube (14) of the hose moves upward and the lower inner wall moves downward under the action of atmospheric pressure. After the gas enters the air inlet end of the inner tube (14), it passes through the outer surface of the fixed cylindrical sound generator (15) and is then supplied to the outside. If the gas or gas does not enter the interior of the cylindrical sound generator (15), or only a small amount enters the interior of the cylindrical sound generator (15), the cylindrical sound generator (15) is insufficient to produce sound. If the outer tube (13) and the inner tube (14) of the hose leak, the gas or air will enter the cavity between the outer tube (13) and the inner tube (14). The inner tube (14) will return to its original shape under its own elasticity or under the elasticity of the elastic breathable material between the cavities, that is, the upper inner wall of the inner tube (14) will... The inner wall of the inner tube (14) moves upward, and the inner wall of the upper side of the inner tube (14) and the inner wall of the lower side of the inner tube (14) come into contact with the surface of the cylindrical support tube (16) or the outer surface of the cylindrical sound generator (15). The gas can only enter the hole of the cylindrical support tube (16) and then enter the cylindrical sound generator (15). The cylindrical sound generator (15) emits a sound to remind the user to check the air tightness of the pipeline, thereby reducing the probability of gas leakage problems caused by gas hose leakage.

10. A safe gas pipe and valve according to claim 1, characterized in that: The elastic membrane (4) is installed on or below the piston (9). If there is air leakage between the piston (9) and the cylinder (10), the elastic membrane (4) will act as a seal.

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