Gas self-closing valve

Abstract

The present application relates to a kind of gas self-closing valve, wherein pressure sensing component includes sensing valve body, mounting seat body, metal pressure spring and sensing shaft rod, mounting seat body is located on sensing valve body, metal pressure spring is located in the lower end of mounting seat body, sensing shaft rod is located in mounting seat body and lower end is in contact with metal pressure spring, sensing shaft rod is provided with shaft rod protrusion;Ball valve component includes ball valve body, ball valve knob and ball valve spool, wherein ball valve body is communicated with sensing valve body, ball valve spool is located in ball valve body and is driven to rotate by ball valve knob, reset torsional spring is provided on ball valve knob, ball valve body is provided with overflow cut-off valve core at one end close to sensing valve body;Horizontal knob top shaft is provided on the upper side of sensing valve body, one end of the knob top shaft is in contact with sensing shaft rod, the other end is in contact with ball valve knob, and the knob top shaft is moved by being in contact with different parts of sensing shaft rod.The present application has high sensitivity, compact structure, simple and reliable operation, and prolongs the service life of product.

Description

Technical Field

[0001] The invention relates to the technical field of gas safety, in particular to a gas self-closing valve. Background Art

[0002] In the field of urban gas, since gas is prone to leakage and explosion, gas accidents are very likely to occur if it is used improperly. In the mildest case, it will cause property loss to the user, and in the worst case, it will endanger the user's life safety. In order to reduce the occurrence of gas accidents, gas companies and gas equipment suppliers have developed various gas safety equipment, and the gas self-closing valve is one of them. This product can cut off the gas when high pressure, underpressure, or overcurrent occurs in the gas pipeline, and is therefore widely used in gas projects.

[0003] But if Figure 7 As shown, existing self-closing valve designs all use magnets and rubber diaphragm bowls as main components. During operation, the rubber diaphragm bowl changes its upper and lower positions with pressure and pushes the magnet to move up and down. The magnet in turn pushes the valve plug to cut off the gas. In order for the valve to work effectively, it is necessary to ensure that the magnet has obvious changes in the suction force on the valve core under different conditions. However, the power that pushes the magnet is the rubber cup, and the rubber cup must have a large enough area to generate a large enough thrust. Therefore, the self-closing valve designed according to this principle is generally large in size. In addition, since the material of the rubber cup is different from that of components such as the spring, it is difficult to ensure consistency with parameters such as the spring force. In addition, the aging of the rubber cup will reduce the safety and reliability of the product. Therefore, the product life must be replaced after three to five years.

[0004] In order to solve the above problems, some gas self-closing valve structures that do not use rubber cups have also appeared in the prior art. For example, the Chinese invention patent with authorization announcement number CN111006046B discloses a gas self-closing valve with a gear rack transmission assembly. During normal operation, the low-pressure spring always resists the limiting component on the gear. The elastic force generated by the low-pressure spring is small and can provide support for the gear. At this time, the gear rack assembly is in a balanced state. When the pressure decreases, the rack has a downward movement trend. At this time, under the action of the low-pressure spring, the gear rotates counterclockwise. When the pressure is too high, the rack has an upward movement trend. The limiting component presses the low-pressure spring and the gear rotates clockwise. The device changes the balanced contact state between it and the push rod through the rotation of the gear, and drives the small diaphragm on the sliding part to close the valve through the push rod. Although the control accuracy of the device is improved, it needs to be configured with structures such as gears and racks, which actually increases the difficulty of product production and installation and increases production costs. Summary of the Invention

[0005] The gas self-closing valve utilizes the metal pressure elastic sheet to sense the gas pressure change, drives the rotating knob top shaft to move through the induction shaft rod lifting action, and further realizes the opening and closing of the ball valve assembly, which is high in sensitivity, compact in structure, simple and reliable in operation, and long in service life.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] The gas self-closing valve comprises a ball valve assembly and a pressure induction assembly, wherein the pressure induction assembly comprises an induction valve body, a mounting seat body, a metal pressure elastic sheet and an induction shaft rod, the mounting seat body is arranged on the induction valve body, the metal pressure elastic sheet is arranged in the lower end of the mounting seat body, the induction shaft rod is arranged in the mounting seat body in a lifting manner and the lower end of the induction shaft rod abuts against the metal pressure elastic sheet, and a shaft rod protrusion is arranged on the induction shaft rod.

[0008] A button is arranged on the upper end of the mounting seat body, and the induction shaft rod is driven to move downward by pressing the button.

[0009] A first spring is arranged in the button, the upper end of the induction shaft rod is connected with the first spring, a second spring is arranged in the lower end of the mounting seat body, and the metal pressure elastic sheet abuts against the second spring when the pressure is normal, and the second spring is a memory spring.

[0010] A button stop wall is arranged in the button, the outer edge of the first spring is fixed on the button stop wall, the upper end of the induction shaft rod is connected with the center of the first spring, a mounting groove is arranged on the lower end of the mounting seat body, the metal pressure elastic sheet is arranged at the groove opening of the mounting groove, the outer edge of the second spring is fixed on the groove bottom of the mounting groove, and the lower end of the induction shaft rod abuts against the metal pressure elastic sheet after extending into the mounting groove and passing through the second spring.

[0011] The groove opening of the mounting groove is provided with an elastic sheet fixing buckle.

[0012] An outer shell is arranged on the upper end of the mounting seat body, and the lower end of the outer shell is threadedly connected with the upper end of the mounting seat body, a gland is arranged on the upper end of the outer shell, and the gland presses the button.

[0013] A control module and a return spring are provided in the upper end of the mounting seat body. The return spring is sleeved on the outside of the control module, and the upper end of the return spring is against the lower end of the pressure cover, and the lower end is against the mounting seat body. The control module is embedded with an Internet of Things remote control unit.

[0014] The ball valve assembly includes a knob shaft, the upper end of the knob shaft is connected to the ball valve knob and the knob reset torsion spring is sleeved on the connection, and the lower end of the knob shaft is connected to the ball valve core key.

[0015] The ball valve knob includes a knob handle, a knob sleeve and a connecting shaft. The upper end of the knob sleeve is provided with a knob handle, and the lower end is threadedly connected to the ball valve body. A connecting shaft is provided in the knob sleeve, and the upper end of the connecting shaft is connected to the knob handle and the lower end is connected to the knob shaft. The knob reset torsion spring is sleeved on the connecting shaft.

[0016] An odor ring is provided on the outside of the ball valve body.

[0017] The advantages and positive effects of the present invention are:

[0018] 1. The present invention uses metal pressure springs to sense changes in gas pressure, and drives the knob top shaft to move by sensing the lifting and lowering action of the shaft, thereby realizing the opening and closing of the ball valve assembly. It can sense the gas status under various conditions such as high pressure, low pressure, normal pressure, overcurrent, etc. and automatically cut off the gas channel with high sensitivity.

[0019] 2. The present invention utilizes a tiny metal pressure spring to ensure sensitivity to changes in gas pressure, and the action amplitude is small. The two-stage power transmission of the sensing shaft and the knob top shaft ultimately converts the deformation of the metal pressure spring into the valve knob control action, thereby ensuring the sensitivity of the present invention while making the overall structure more compact and effectively reducing the product volume.

[0020] 3. The present invention uses metal pressure springs, induction shafts, knob top shafts and other structures to replace the existing magnets and rubber diaphragm bowl structures, effectively extending the service life of the product.

[0021] 4. The present invention provides a second spring made of a memory spring above the metal pressure spring to realize the high-temperature cut-off function. When the temperature rises sharply, the memory spring will automatically expand to make the metal pressure spring concave and drive the sensing shaft rod to move downward, thereby automatically closing the valve.

[0022] 5. In addition to sensing the gas pressure and automatically cutting off the gas, the present invention is also simple and reliable in normal operation. The present invention can close the valve normally by pressing the button, and can also close the valve for a long time by twisting the shell.

[0023] 6. The present invention can set a control module in the mounting seat as needed, and the control module is embedded with an Internet of Things remote control unit, which can remotely control the opening and closing of the valve through the Internet of Things, making the operation simpler and more convenient.

[0024] 7. The present invention can provide an animal-repelling scent ring on the ball valve assembly as needed to prevent mice and other animals from biting the hose and avoiding accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention,

[0026] Figure 2 for Figure 1 A partial enlarged view of the present invention,

[0027] Figure 3 This is a schematic diagram of the present invention when the gas pressure is normal.

[0028] Figure 4 This is a schematic diagram of the low-voltage cut-off state of the present invention.

[0029] Figure 5 This is a schematic diagram of the state of the present invention when high voltage is cut off.

[0030] Figure 6 This is a schematic diagram of the state of the present invention when it is cut off due to overcurrent.

[0031] Figure 7 It is a schematic diagram of the structure of a gas self-closing valve in the prior art.

[0032] Among them, 1 is a retaining ring, 2 is an outer shell, 3 is a retaining ring, 4 is a pressure cover, 5 is a button, 6 is a first spring, 7 is a second spring, 8 is a reset spring, 9 is a control module, 10 is a mounting seat body, 11 is a sensing shaft, 1101 is a shaft protrusion, 12 is a metal pressure spring, 13 is a spring fixing buckle, 14 is a sensing valve body, 15 is a knob top shaft, 16 is a ball valve knob, 161 is a knob handle, 162 is a knob sleeve, 17 is an over-current cut-off valve core, 18 is a limit baffle, 19 is a knob reset torsion spring, 20 is a ball valve body, 21 is a knob shaft, 22 is a ball valve core, and 23 is an over-current cut-off valve seat. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] like Figures 1 to 6As shown, the present invention includes a ball valve assembly and a pressure sensing assembly, wherein the pressure sensing assembly includes a sensing valve body 14, a mounting seat body 10, a metal pressure spring 12 and a sensing shaft 11, the mounting seat body 10 is arranged on the sensing valve body 14, the metal pressure spring 12 is arranged in the lower end of the mounting seat body 10, the sensing shaft 11 is arranged in a liftable manner inside the mounting seat body 10 and the lower end is against the metal pressure spring 12, and the sensing shaft 11 is provided with a shaft protrusion 1101; the ball valve assembly includes a ball valve body 20, a ball valve knob 16 and a ball valve core 22, wherein the ball valve body 20 and the sensing valve body 14 is threadedly connected and internally connected to form a gas channel. The ball valve core 22 is arranged inside the ball valve body 20 and is driven to rotate by the ball valve knob 16 arranged on the ball valve body 20. The ball valve knob 16 is provided with a knob reset torsion spring 19. The ball valve body 20 is provided with an over-current cut-off valve core 17 at one end near the sensing valve body 14. A horizontal shaft channel is provided on the upper side of the sensing valve body 14. A knob top shaft 15 is provided in the shaft channel. One end of the knob top shaft 15 abuts against the sensing shaft 11, and the other end abuts against the knob protrusion on the outer surface of the ball valve knob 16. Figures 3 to 6 As shown, when the present invention is working, the metal pressure spring 12 senses the gas pressure in the pipeline and deforms according to the three conditions of high pressure, low pressure and normal pressure to drive the sensing shaft 11 to rise and fall vertically, so that the knob top shaft 15 and different parts of the sensing shaft 11 are offset. Figure 3 When the pressure is normal, the shaft protrusion 1101 on the sensing shaft 11 abuts against the knob top shaft 15. At this time, the knob top shaft 15 moves forward to abut the ball valve knob 16, so that the ball valve core 22 is in the open state. At the same time, the knob return torsion spring 19 in the ball valve knob 16 is in a tightened state. When the pressure is low, the internal pressure of the pipeline is relatively small. Figure 4 As shown, the metal pressure spring 12 is recessed downward to make the sensing shaft 11 drop, and the knob top shaft 15 no longer abuts against the shaft protrusion 1101, but abuts against the sensing shaft 11 portion on the upper side of the shaft protrusion 1101, so that the knob top shaft 15 no longer presses against the ball valve knob 16, and the ball valve knob 16 rotates under the drive of the knob return torsion spring 19, and the ball valve core 22 rotates 90° to cut off the gas channel, and when the high pressure is Figure 5 As shown, the metal pressure spring 12 further protrudes upward under the action of the internal high-pressure gas, thereby causing the sensing shaft 11 to rise. The knob top shaft 15 no longer abuts against the shaft protrusion 1101, but instead abuts against the portion of the sensing shaft 11 below the shaft protrusion 1101. As a result, the knob top shaft 15 no longer presses against the ball valve knob 16, which drives the ball valve core 22 to rotate 90°, shutting off the gas passage. The metal pressure spring 12 can be made of materials such as spring steel to ensure consistent parameters with the respective springs.

[0035] like Figures 1-2 As shown, a button 5 is provided on the upper end of the mounting seat body 10. When the valve needs to be closed normally, the sensing shaft 11 is driven downward by pressing the button 5. At this time, the shaft protrusion 1101 no longer abuts against the knob top shaft 15, and the knob top shaft 15 no longer presses against the ball valve knob 16. The ball valve knob 16 drives the ball valve core 22 to rotate 90° to cut off the gas channel.

[0036] like Figures 1-2 As shown, the button 5 is internally provided with a first spring 6, and the upper end of the sensing shaft 11 is connected to the first spring 6. The lower end of the mounting base 10 is provided with a second spring 7. When the pressure is normal, a metal pressure spring 12 abuts against the second spring 7. The second spring 7 is a memory spring used to implement a high-temperature shutoff function. The principle is that when the temperature rises significantly, the memory spring automatically expands, causing the metal pressure spring 12 to concave, and driving the sensing shaft 11 downward, thereby closing the valve. Such memory springs are well known in the art and are commercially available.

[0037] like Figure 2 As shown, a button stop wall 501 is provided inside the button 5, the outer edge of the first spring 6 is fixed on the button stop wall 501, the upper end of the sensing shaft 11 is connected to the center of the first spring 6, and the lower end of the mounting seat body 10 is provided with a mounting groove 1001, the metal pressure spring sheet 12 is provided at the groove of the mounting groove 1001, the outer edge of the second spring 7 is fixed to the bottom of the mounting groove 1001, the lower end of the sensing shaft 11 extends into the mounting groove 1001 and passes through the second spring 7 and then resists against the metal pressure spring sheet 12, and the groove of the mounting groove 1001 is provided with a spring sheet fixing buckle 13 to fix the edge of the metal pressure spring sheet 12 on the mounting seat body 10.

[0038] like Figure 2 As shown, a rotatable shell 2 is provided at the upper end of the mounting seat body 10, and a clamping ring 3 is provided at the lower end of the shell 2 and is threadedly connected to the upper end of the mounting seat body 10, so that the shell 2 can be rotated to achieve its lifting and lowering movement relative to the mounting seat body 10. A pressure cover 4 is provided at the upper end of the shell 2, and the pressure cover 4 presses the button 5. When the valve needs to be closed for a long time, the operator can rotate the shell 2 to make it descend, and drive the button 5 to descend through the pressure cover 4, thereby driving the sensing shaft 11 to descend and maintain its descending state, thereby achieving the purpose of closing the valve for a long time. When the valve needs to be opened, the shell 2 is rotated in the opposite direction to make it ascend, and the button 5, sensing shaft 11, metal pressure spring 12 and other components automatically return to their original positions. Figure 2As shown, a snap ring 1 is provided on the upper end of the gland 4 to connect it to the housing 2. In addition, a shaft passage for accommodating the knob top shaft 15 is provided on one side of the mounting base 10, and a limit baffle 18 is provided on the outside of the housing 2 to extend the shaft passage distance to prevent the knob top shaft 15 from detaching.

[0039] like Figures 1-2 As shown, a control module 9 and a return spring 8 are provided in the upper end of the mounting base body 10. The return spring 8 is sleeved on the outside of the control module 9, and the upper end of the return spring 8 abuts against the lower end of the pressure cover 4, while the lower end of the return spring 8 abuts against the mounting base body 10. The control module 9 is an electromagnetic control module, which is provided with an electromagnet coil and other structures. When the electromagnet coil is energized, an electromagnetic attraction is generated and attracts the sensing shaft 11 to move upward to close the ball valve assembly. When the electromagnet coil is de-energized, the electromagnetic attraction disappears, and the return spring 8 drives the sensing shaft 11 to return to its original position. This is a well-known technology in the art. For example, the Chinese invention patent with authorization announcement number CN210692253U discloses an electromagnetic sensor structure. However, the present invention adds an Internet of Things remote control unit to the control module 9, which can realize remote control of the power on and off of the electromagnet coil through the Internet of Things, thereby realizing remote control of the opening and closing of the present invention. The Internet of Things remote control unit is programmed and is well-known technology in the art.

[0040] like Figure 1 As shown, the ball valve assembly further includes a knob shaft 21, the upper end of the knob shaft 21 is connected to the ball valve knob 16 and the knob reset torsion spring 19 is sleeved on the connection, the lower end of the knob shaft 21 is key-connected to the ball valve core 22 to drive it to rotate, and a valve core through hole is provided in the ball valve core 22, as shown in FIG. Figure 1 As shown, when both sides of the valve core through hole are connected to the gas channel in the valve body, the valve body is in an open state, and as shown Figure 4 As shown, when the ball valve core 22 rotates 90 degrees, the valve core through hole is no longer connected to the gas channel in the valve body, and the valve body is in a closed state.

[0041] like Figure 1 As shown, the ball valve knob 16 includes a knob handle 161, a knob sleeve 162 and a connecting shaft. The upper end of the knob sleeve 162 is provided with a knob handle 161, and the lower end is threadedly connected to the ball valve body 20. A connecting shaft is provided in the knob sleeve 162, and the upper end of the connecting shaft is connected to the knob handle 161 and the lower end is connected to the knob shaft 21. The knob reset torsion spring 19 is sleeved on the connecting shaft.

[0042] like Figure 6As shown, an over-current cut-off valve core 17 and an over-current cut-off valve seat 23 are provided inside the ball valve body 20 near one end of the sensing valve body 14, and the over-current cut-off valve core 17 is movably provided in the over-current cut-off valve seat 23. When the gas exceeds the flow rate, the over-current cut-off valve core 17 starts to cut off the gas channel. This is a well-known technology in the art. The over-current cut-off valve core 17 and the over-current cut-off valve seat 23 used in this embodiment have the same structure as those in the CN208204111U patent.

[0043] A scent ring for repelling animals can be installed at a suitable location (e.g., the nozzle) outside the ball valve body 20 as needed to prevent rats and other animals from chewing the hose. Such a scent ring is well known in the art. For example, a cavity is provided within the ring wall to hold an odorant that repels animals, while small holes with a diameter smaller than that of the odorant particles are evenly distributed throughout the ring wall to allow the odor to pass through.

[0044] The working principle of the present invention is:

[0045] like Figure 7 As shown in the figure, the existing self-closing valve designs all use magnets and rubber diaphragm bowls as the main components. Figures 1 to 6 As shown, the present invention utilizes a metal pressure spring 12, a sensing shaft 11, a knob top shaft 15, etc. to replace the existing magnet and rubber diaphragm bowl structure.

[0046] When the present invention is working, the metal pressure spring 12 senses the gas pressure in the pipeline and deforms according to the three conditions of high pressure, low pressure and normal pressure to drive the sensing shaft 11 to rise and fall vertically, so that the knob top shaft 15 and different parts of the sensing shaft 11 are offset. Figure 3 When the pressure is normal, the shaft protrusion 1101 on the sensing shaft 11 abuts against the knob top shaft 15. At this time, the knob top shaft 15 presses forward against the ball valve knob 16 to open the ball valve core 22. At the same time, the knob return torsion spring 19 in the ball valve knob 16 is in a tensioned state. Figure 4 As shown, due to the low pressure inside the pipeline, the metal pressure spring 12 is recessed downward and the sensing shaft 11 is lowered, the knob top shaft 15 is no longer against the shaft protrusion 1101, and the knob top shaft 15 is no longer pressed against the ball valve knob 16. The ball valve knob 16 rotates under the drive of the knob return torsion spring 19 and causes the ball valve core 22 to rotate 90 degrees to cut off the gas channel. When the pressure is high, Figure 5As shown, the metal pressure spring 12 further protrudes upward under the action of the internal high-pressure gas, thereby causing the sensing shaft 11 to rise, and the knob top shaft 15 no longer abuts against the shaft protrusion 1101, but abuts against the sensing shaft 11 part on the lower side of the shaft protrusion 1101. In this way, the knob top shaft 15 also no longer presses against the ball valve knob 16. The ball valve knob 16 drives the ball valve core 22 to rotate 90° to cut off the gas channel. When overcurrent protection is required, as shown in FIG. Figure 6 As shown, the over-flow cut-off valve core 17 starts to cut off the gas passage.

[0047] In addition, Figure 2 As shown, a button 5 is provided at the top of the mounting base 10. When the valve needs to be closed normally, the sensing shaft 11 is driven downward by pressing the button 5. At this time, the shaft protrusion 1101 no longer contacts the knob top shaft 15, thereby opening the valve. When the button 5 is released, the button 5, sensing shaft 11, metal pressure spring 12, and other components automatically return to their original positions. If the valve needs to be closed for a long time, the operator can rotate the housing 2 at the top of the mounting base 10 to lower it, and drive the button 5 downward through the gland 4, thereby driving the sensing shaft 11 downward and maintaining its downward position, thereby achieving the purpose of long-term valve closure. When the valve needs to be opened, the housing 2 is rotated in the opposite direction to raise it, and the button 5, sensing shaft 11, metal pressure spring 12, and other components automatically return to their original positions.

[0048] like Figure 2 As shown, a second spring 7 is provided in the lower end of the mounting seat body 10 of the present invention, and in the normal pressure state, the second spring 7 is offset against the metal pressure spring piece 12. The second spring 7 is a memory spring and is used to realize the high-temperature cut-off function. The principle is that when the temperature rises significantly, the memory spring will automatically expand to make the metal pressure spring piece 12 concave and drive the sensing shaft rod 11 to move downward, thereby closing the valve.

[0049] like Figure 2 As shown, a control module 9 and a return spring 8 are further provided inside the mounting seat body 10. The control module 9 can adopt an electromagnetic control module, and an Internet of Things remote control unit can be embedded in the control module 9, so that the electromagnetic coil of the electromagnetic control module can be remotely controlled through the Internet of Things to be powered on and off, thereby realizing remote control of the opening and closing of the present invention.

[0050] In addition, the present invention provides an odor ring on the outside of the ball valve assembly to drive away animals and prevent them from biting the hose.

[0051] The present invention utilizes a metal pressure spring piece 12 to sense changes in gas pressure, and drives the knob top shaft 15 to move through the lifting and lowering action of the sensing shaft 11, thereby realizing the opening and closing of the ball valve assembly. The tiny metal pressure spring piece 12 ensures sensitivity to changes in gas pressure, and the action amplitude is small. The two-stage power transmission of the sensing shaft 11 and the knob top shaft 15 ultimately converts the deformation of the metal pressure spring piece 12 into a valve knob control action, so that the present invention ensures sensitivity while having a more compact overall structure, effectively reducing the product volume.

Claims

1. A gas self-closing valve, characterized by: The invention comprises a ball valve assembly and a pressure sensing assembly, wherein the pressure sensing assembly comprises a sensing valve body (14), a mounting seat body (10), a metal pressure spring sheet (12) and a sensing shaft rod (11), wherein the mounting seat body (10) is arranged on the sensing valve body (14), the metal pressure spring sheet (12) is arranged in the lower end of the mounting seat body (10), the sensing shaft rod (11) is arranged in the mounting seat body (10) in a liftable manner and the lower end thereof abuts against the metal pressure spring sheet (12), and the sensing shaft rod (11) is provided with a shaft rod protrusion (1101); the ball valve assembly comprises a ball valve body (20), a ball valve knob (16) and a ball valve core (22), wherein the ball valve body (20) ) is connected to the sensing valve body (14), the ball valve core (22) is arranged in the ball valve body (20) and is driven to rotate by the ball valve knob (16) arranged on the ball valve body (20), the ball valve knob (16) is provided with a knob reset torsion spring (19), and the ball valve body (20) is provided with an over-current cut-off valve core (17) at one end close to the sensing valve body (14); a horizontal knob top shaft (15) is provided on the upper side of the sensing valve body (14), one end of the knob top shaft (15) is against the sensing shaft (11), and the other end is against the ball valve knob (16), and the knob top shaft (15) is moved by being against different parts of the sensing shaft (11).

2. The gas self-closing valve according to claim 1, characterized in that: A button (5) is provided at the upper end of the mounting seat body (10), and the sensing shaft (11) is driven to move downward by pressing the button (5).

3. The gas self-closing valve according to claim 2, characterized in that: A first spring (6) is provided inside the button (5), and the upper end of the sensing shaft (11) is connected to the first spring (6). A second spring (7) is provided inside the lower end of the mounting seat (10), and when the pressure is normal, the metal pressure spring (12) is offset against the second spring (7), and the second spring (7) is a memory spring.

4. The gas self-closing valve according to claim 3, characterized in that: A button stop wall (501) is provided inside the button (5), the outer edge of the first spring (6) is fixed on the button stop wall (501), the upper end of the sensing shaft (11) is connected to the center of the first spring (6), the lower end of the mounting seat (10) is provided with a mounting groove (1001), the metal pressure spring sheet (12) is provided at the groove of the mounting groove (1001), the outer edge of the second spring (7) is fixed to the bottom of the mounting groove (1001), the lower end of the sensing shaft (11) extends into the mounting groove (1001) and passes through the second spring (7) and then abuts against the metal pressure spring sheet (12).

5. The gas self-closing valve according to claim 4, characterized in that: The notch of the installation slot (1001) is provided with a spring fixing buckle (13).

6. The gas self-closing valve according to claim 2, characterized in that: The upper end of the mounting seat body (10) is provided with a shell (2), and the lower end of the shell (2) is threadedly connected to the upper end of the mounting seat body (10). The upper end of the shell (2) is provided with a pressure cover (4), and the pressure cover (4) presses the button (5).

7. The gas self-closing valve according to claim 6, characterized in that: A control module (9) and a return spring (8) are provided in the upper end of the mounting seat body (10); the return spring (8) is sleeved on the outside of the control module (9); the upper end of the return spring (8) abuts against the lower end of the pressure cover (4), and the lower end abuts against the mounting seat body (10); and an Internet of Things remote control unit is embedded in the control module (9).

8. The gas self-closing valve according to claim 1, characterized in that: The ball valve assembly comprises a knob shaft (21), the upper end of the knob shaft (21) is connected to the ball valve knob (16) and the knob reset torsion spring (19) is sleeved on the connection, and the lower end of the knob shaft (21) is key-connected to the ball valve core (22).

9. The gas self-closing valve according to claim 8, characterized in that: The ball valve knob (16) comprises a knob handle (161), a knob sleeve (162) and a connecting shaft. The knob sleeve (162) has a knob handle (161) at its upper end and is threadedly connected to the ball valve body (20) at its lower end. A connecting shaft is provided in the knob sleeve (162), and the upper end of the connecting shaft is connected to the knob handle (161) and the lower end is connected to the knob shaft (21). The knob reset torsion spring (19) is sleeved on the connecting shaft.

10. The gas self-closing valve according to claim 1, characterized in that: An odor ring is provided on the outer side of the ball valve body (20).

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