Self-locking protective gas valve

Abstract

The invention discloses a self-locking protective gas valve, and particularly relates to the technical field of gas valves, the self-locking protective gas valve comprises a communicating groove, a gas inlet pipe arranged at the input end of a valve body and a gas outlet pipe arranged at the output end of the valve body, the communicating groove is formed in the valve body, and a fixing seat is fixedly connected to the interior of the communicating groove; a pressurizing assembly is installed in the valve body. By arranging the fixing base, the sealing base, the reset assembly and the like, after the gas inlet pipe and the main gas pipe are fixedly installed together, the interior of the gas inlet pipe is in a sealed state, when the gas outlet pipe is not connected with the user gas inlet pipe, gas cannot overflow, after the user gas inlet pipe is connected, when the user gas inlet pipe leaks gas, the pressure intensity in the sliding groove is reduced, and the gas leakage is avoided. The sealing seat is automatically attached to the surface of the fixing seat in a sealed mode, the self-locking function of the valve is achieved, the valve can be opened only by manually pressing the inserting rod again, the risk of gas leakage is greatly reduced, and using safety is improved.

Description

Technical Field

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

[0002] The gas self-closing valve is a safety device used in gas systems that can automatically shut off the gas supply when an abnormal situation is detected (such as gas leakage, abnormal pressure or fire). This valve is designed to improve the safety of gas use and prevent accidents. The gas self-closing valve uses a variety of technologies and structural designs to ensure that the gas supply can be quickly and reliably shut off in an emergency, thereby improving safety. The magnetic drive system is widely used in gas self-closing valves due to its fast response and reliability. Through the magnetic force of a permanent magnet or electromagnet, the valve core can complete the closing action within a few milliseconds, effectively preventing gas leaks and accidents.

[0003] The self-locking structure of the gas self-closing valve in the prior art usually relies on the adsorption capacity of the electromagnet or permanent magnet to achieve a quick self-locking function. However, both technologies have their limitations. In the electromagnetic self-locking structure, the drive of the electromagnet relies on electricity. If the power is interrupted or the electromagnet itself is damaged, the gas self-closing valve will lose its self-locking protection function, resulting in an inability to effectively cut off the gas supply in an emergency. On the other hand, although the permanent magnet self-locking structure does not require power, its magnetic force will gradually weaken with the passage of time and environmental factors (such as temperature increase, vibration or magnetic field interference). This attenuation may cause the self-closing valve to fail to work normally at a critical moment, thereby affecting its protection function. Therefore, the self-locking structure of the gas self-closing valve in the prior art has certain defects in reliability and long-term performance.

[0004] Therefore, those skilled in the art provide a self-locking protective gas valve to solve the problems raised in the above background technology. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a self-locking protective gas valve, which has the advantages of being equipped with a fixing seat, a sealing seat and a reset assembly, and when the air inlet pipe is fixedly installed together with the main gas pipe, the interior of the air inlet pipe is in a sealed state, and when the air outlet pipe is not connected to the user's air inlet pipe, the gas will not overflow. After the user's air inlet pipe is connected, when the user's air inlet pipe leaks, the pressure inside the slide groove decreases, and the sealing seat is automatically sealed and fitted to the surface of the fixing seat, thereby realizing the self-locking function of the valve, and the valve can only be opened by manually pressing the plug rod again, which greatly reduces the risk of gas leakage and improves safety during use, and solves the problem that the self-locking structure of the gas self-closing valve does exist in long-term use, especially the problems of dependence on electricity and magnetic attenuation.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, a fixing seat, a sealing seat and a reset assembly are provided. When the air inlet pipe is fixedly installed together with the main gas pipe, the interior of the air inlet pipe is in a sealed state. When the air outlet pipe is not connected to the user's air inlet pipe, the gas will not overflow. After the user's air inlet pipe is connected, when the user's air inlet pipe leaks, the pressure inside the slide groove is reduced, and the sealing seat is automatically sealed and fitted to the surface of the fixing seat, thereby realizing the self-locking function of the valve, and the valve can only be opened by manually pressing the plug rod again, which greatly reduces the risk of gas leakage and improves the safety during use. The present invention provides the following technical solutions: a self-locking protective gas valve, comprising a connecting groove, an air inlet pipe arranged at the input end of the valve body and an air outlet pipe arranged at the output end of the valve body, the interior of the valve body A connecting groove is provided, a fixing seat is fixedly connected to the inside of the connecting groove, a sealing seat is slidably connected to the inside of the connecting groove, a sliding groove is provided inside the valve body, a sliding block is sealingly and slidably connected to the inside of the sliding groove, a connecting pipe is fixedly connected to the inside of the valve body, a reset component is installed inside the valve body, a sliding seat is transversely slidably connected to the inside of the valve body, a connecting plate is fixedly connected to the bottom of the sliding seat, an end of the connecting plate away from the sliding seat is fixedly connected to the surface of the sealing seat, a positioning groove is provided inside the sliding seat, a plug rod is inserted at the top center of the valve body, a limiting groove is provided inside the valve body, a limiting ring is fixedly sleeved on the outer surface of the plug rod, a spring is movably installed inside the limiting groove, and a boosting component is installed inside the valve body.

[0009] Preferably, the reset assembly includes an L-rod fixedly connected to the surface of the slider, the end of the L-rod away from the slider is fixedly connected to a connecting rod, the end face of the connecting rod away from the L-rod is fixedly connected to the center of the surface of the sealing seat, the surface of the L-rod is fixedly connected to a connecting rod, the end face of the connecting rod is fixedly connected to a sealing plate, a sealing groove is provided inside the valve body, a connecting pipe is fixedly connected to the inside of the valve body, and a rail rod is inserted through the inside of the L-rod.

[0010] Preferably, the boost assembly includes a swivel and a silicone damping ring fixedly connected to the inside of the valve body, the outer surface of the swivel is fixedly sleeved with a driving gear, the surface of the driving gear is meshingly connected with a driven gear, a screw is fixedly connected at the inner center of the driven gear, a fixed bearing is fixedly installed on the top of the outer surface of the screw, an adjusting chamber is opened inside the valve body, an adjusting plate is sealingly and slidably connected to the inside of the adjusting chamber, a ventilation pipe is fixedly connected to the inside of the valve body, and a pressure gauge is fixedly installed inside the valve body.

[0011] Preferably, the inner ends of the connecting groove are respectively connected to the inner parts of the air inlet pipe and the air outlet pipe, the surface of the sealing seat is provided with air holes at equal intervals, an air outlet hole is provided at the inner center of the fixed seat, and a sealing gasket is fixedly connected to the surface of the sealing seat close to the fixed seat.

[0012] Preferably, the outer surface of the sealing plate is sealingly and slidably connected to the inside of the sealing groove, and the outer surface of the connecting rod is movably inserted into the inner center of the air outlet.

[0013] Preferably, a limiting hole is formed through the interior of the L-rod, and the L-rod is slidably connected to the outer surface of the rail rod through the limiting hole, and both ends of the rail rod are fixedly connected to the interior of the valve body.

[0014] Preferably, the limiting ring is hexagonal, and a hexagonal groove matching the limiting ring is formed through the surface of the rotating ring.

[0015] Preferably, the inner wall of the silicone damping ring abuts against the surface of the rotating ring, the outer surface of the rotating ring is rotatably connected to the inside of the valve body, and the outer surface of the driving gear is rotatably connected to the inside of the valve body.

[0016] Preferably, the outer surface of the screw is threadedly engaged and rotatably connected to the inner center of the adjustment plate, a threaded hole matching the screw is opened at the inner center of the adjustment plate, the inner top end of the adjustment cavity is fixedly connected to a limit rod, and the outer surface of the limit rod is inserted into the interior of the adjustment plate.

[0017] Preferably, the outer surface of the limiting ring is slidably connected to the inside of the limiting groove, the end of the insertion rod is arc-shaped, the positioning groove is trapezoidal, and the end of the insertion rod abuts against the inner wall of the positioning groove.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a self-locking protective gas valve, which has the following beneficial effects:

[0020] When the gas inlet pipe is deflated, the pressure inside the slide groove is reduced, and the sealing seat is automatically sealed and fitted on the surface of the fixed seat, thereby realizing the self-locking function of the valve, and the valve can be opened only by manually pressing the slide rod again, which greatly reduces the risk of gas leakage and improves the safety during use.

[0021] 2. The self-locking protective gas valve can control the pressure inside the sealing groove by setting a reset component and a boost component, so that the sliding damping of the slider can be adjusted according to the gas pressure intensity inside the intake pipe, so that after pressing the plug rod, the gas pressure inside the connecting groove enters the slide groove through the connecting pipe, so that the slider can smoothly push the sealing seat to slide to the left. Therefore, it can be installed and used in different scenarios, which enhances its applicability.

[0022] 3. The self-locking protective gas valve is provided with a limit ring and a swivel. When the plug rod is pulled up to the top of the limit groove, the limit ring can be driven to engage with the inside of the swivel, and the screw can be rotated to realize the up and down sliding of the adjustment plate. Therefore, the setting of the plug rod is functional and improves the operational flexibility and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a self-locking protective gas valve proposed by the present invention;

[0024] Figure 2 This is an overall cross-sectional view of a self-locking protective gas valve proposed by the present invention;

[0025] Figure 3 This is a structural schematic diagram of a sliding seat in a self-locking protective gas valve proposed by the present invention;

[0026] Figure 4 A schematic diagram of the connection between a fixing seat and a sealing seat in a self-locking protective gas valve proposed by the present invention;

[0027] Figure 5 for Figure 2 The enlarged view of point A in the middle;

[0028] Figure 6 This is a schematic diagram of the connection between the L rod and the connecting rod in a self-locking protective gas valve proposed by the present invention;

[0029] Figure 7 This is a structural schematic diagram of an L-rod in a self-locking protective gas valve proposed by the present invention;

[0030] Figure 8 for Figure 2 The enlarged view of point B in the middle;

[0031] Fig. 9 The present invention provides a connection intention between the plug rod and the limit ring in a self-locking protective gas valve;

[0032] Fig.10 The present invention provides a schematic structural diagram of a self-locking protective gas valve swivel ring.

[0033] In the figure: 1, valve body; 2, air inlet pipe; 3, air outlet pipe; 4, connecting groove; 5, fixing seat; 51, air outlet hole; 6, sealing seat; 61, air hole; 62, sealing pad; 7, slide groove; 8, slider; 9, connecting pipe; 10, reset assembly; 101, L rod; 1011, limit hole; 102, connecting rod; 103, connecting rod; 104, sealing plate; 105, sealing groove; 106, connecting pipe; 107 , rail rod; 11, slide seat; 12, connecting plate; 13, positioning groove; 14, insertion rod; 15, limit groove; 16, limit ring; 17, spring; 18, booster assembly; 181, swivel; 182, silicone damping ring; 183, driving gear; 184, driven gear; 185, screw; 186, fixed bearing; 187, adjusting chamber; 188, adjusting plate; 189, ventilation pipe; 1810, pressure gauge. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-10A self-locking protective gas valve comprises a connecting groove 4, an air inlet pipe 2 arranged at the input end of the valve body 1 and an air outlet pipe 3 arranged at the output end of the valve body 1, the valve body 1 is provided with a connecting groove 4, the connecting groove 4 is fixedly connected with a fixing seat 5, the connecting groove 4 is slidably connected with a sealing seat 6, the valve body 1 is provided with a sliding groove 7, the sliding groove 7 is sealed and slidably connected with a slider 8, the valve body 1 is fixedly connected with a connecting pipe 9, the valve body 1 is installed with a reset assembly 10, the valve body 1 is laterally slidable The bottom of the sliding seat 11 is fixedly connected with a connecting plate 12, and one end of the connecting plate 12 away from the sliding seat 11 is fixedly connected to the surface of the sealing seat 6. A positioning groove 13 is provided inside the sliding seat 11, and a plug rod 14 is inserted at the top center of the valve body 1. A limiting groove 15 is provided inside the valve body 1, and a limiting ring 16 is fixedly sleeved on the outer surface of the plug rod 14. A spring 17 is movably installed inside the limiting groove 15, and a booster assembly 18 is installed inside the valve body 1. By setting the fixed seat 5, the sealing seat 6 and the complex After the gas inlet pipe 2 is connected with the main gas pipe, the inside of the gas inlet pipe 2 is in a sealed state. When the gas outlet pipe 3 is not connected with the user's gas inlet pipe, the gas will not overflow. After the user's gas inlet pipe is connected, by pressing the plug rod 14, the sliding seat 11 will be driven to slide. The sliding of the sliding seat 11 will drive the sealing seat 6 to slide away from the fixing seat 5. At this time, the gas enters the connecting groove 4 through the gas inlet pipe 2, and then passes through the sealing seat 6 and the fixing seat 5 through the gas outlet pipe 3 to enter the user's gas inlet pipe. Since the inside of the connecting groove 4 is in a strong pressure state at this time, the sealing seat 6 will be driven to slide to the left through the slider 8 and the reset assembly 10. Even if no external force is applied to the plug rod 14, the inside of the connecting groove 4 is still in a ventilation state. When the user's gas inlet pipe is deflated, the internal pressure of the slide groove 7 is reduced, and the sealing seat 6 is automatically sealed and fitted on the surface of the fixing seat 5, realizing the self-locking function of the valve, and the valve can only be opened by manually pressing the plug rod 14 again, which greatly reduces the risk of gas leakage and improves the safety during use.

[0036] The reset assembly 10 includes an L rod 101 fixedly connected to the surface of the slider 8, the end of the L rod 101 away from the slider 8 is fixedly connected to a connecting rod 102, the end face of the connecting rod 102 away from the L rod 101 is fixedly connected to the center of the surface of the sealing seat 6, the surface of the L rod 101 is fixedly connected to a connecting rod 103, the end face of the connecting rod 103 is fixedly connected to a sealing plate 104, a sealing groove 105 is opened inside the valve body 1, a connecting pipe 106 is fixedly connected inside the valve body 1, and a rail rod 107 is inserted through the inside of the L rod 101. By setting the reset assembly 10, when the internal pressure of the slide groove 7 is greater than or equal to the internal pressure of the sealing groove 105, the connectivity between the fixed seat 5 and the sealing seat 6 can be guaranteed.

[0037] The boost component 18 includes a swivel 181 and a silicone damping ring 182 fixedly connected to the inside of the valve body 1, a driving gear 183 is fixedly sleeved on the outer surface of the swivel 181, a driven gear 184 is meshedly connected to the surface of the driving gear 183, a screw 185 is fixedly connected to the inner center of the driven gear 184, a fixed bearing 186 is fixedly installed on the top of the outer surface of the screw 185, an adjusting chamber 187 is opened inside the valve body 1, an adjusting plate 188 is sealingly and slidably connected to the inside of the adjusting chamber 187, a vent pipe 189 is fixedly connected to the inside of the valve body 1, and a pressure gauge 1810 is fixedly installed inside the valve body 1. By setting the boost component 18, when the insertion rod 14 is pulled up to the top of the limiting groove 15, the limiting ring 16 can be driven to mesh with the inside of the swivel 181, and the screw 185 can be rotated to realize the up and down sliding of the adjusting plate 188. Therefore, the setting of the insertion rod 14 is functional and improves the operational flexibility and convenience.

[0038] The inner ends of the connecting groove 4 are respectively connected with the inner parts of the air inlet pipe 2 and the air outlet pipe 3. The surface of the sealing seat 6 is provided with air holes 61 at equal intervals. The inner center of the fixed seat 5 is provided with an air outlet hole 51. The surface of the sealing seat 6 close to the fixed seat 5 is fixedly connected with a sealing gasket 62. By setting the sealing gasket 62, the sealing between the fixed seat 5 and the sealing seat 6 can be strengthened.

[0039] The outer surface of the sealing plate 104 is sealingly and slidably connected to the inside of the sealing groove 105, and the outer surface of the connecting rod 102 is movably inserted in the inner center of the air outlet 51. By setting a structure in which the connecting rod 102 can slide freely inside the air outlet 51, it can be ensured that the connecting rod 102 can pull the sealing seat 6 and drive it to slide.

[0040] A limiting hole 1011 is formed through the interior of the L-rod 101, and the L-rod 101 is slidably connected to the outer surface of the rail rod 107 through the limiting hole 1011. Both ends of the rail rod 107 are fixedly connected to the interior of the valve body 1. By setting the rail rod 107 and the limiting hole 1011, the sliding stability of the sealing plate 104 and the slider 8 can be ensured.

[0041] The limiting ring 16 is hexagonal, and the surface of the rotating ring 181 is penetrated with a hexagonal groove matching the limiting ring 16. By setting the hexagonal limiting ring 16, when the limiting ring 16 is engaged with the hexagonal groove on the surface of the rotating ring 181, the limiting ring 16 and the rotating ring 181 can be driven to rotate by rotating the insert rod 14.

[0042] The inner wall of the silicone damping ring 182 abuts against the surface of the swivel 181, the outer surface of the swivel 181 is rotatably connected to the inside of the valve body 1, and the outer surface of the driving gear 183 is rotatably connected to the inside of the valve body 1. By providing the silicone damping ring 182, the swivel 181 can be positioned after rotation, and the sliding position of the adjustment plate 188 can be positioned.

[0043] The outer surface of the screw rod 185 is threadedly engaged and rotatably connected to the inner center of the adjustment plate 188. A threaded hole matching the screw rod 185 is opened in the inner center of the adjustment plate 188. The inner top of the adjustment cavity 187 is fixedly connected to a limit rod. The outer surface of the limit rod is inserted into the interior of the adjustment plate 188. By setting the limit rod, the adjustment plate 188 can be prevented from rotating, so that the adjustment plate 188 can only slide longitudinally.

[0044] The outer surface of the limiting ring 16 is slidably connected to the inside of the limiting groove 15, the end of the insertion rod 14 is arc-shaped, the positioning groove 13 is trapezoidal, and the end of the insertion rod 14 is against the inner wall of the positioning groove 13. Since the end of the insertion rod 14 is arc-shaped, the friction between the insertion rod 14 and the positioning groove 13 can be reduced, thereby extending the service life of the insertion rod 14 or the sliding seat 11.

[0045] When in use, the valve body 1 is connected to the main gas pipeline through the air inlet pipe 2, and then the user's air inlet pipe and the air outlet pipe 3 are sealed and connected. After the main gas pipeline valve is opened, the high-pressure gas enters the left end of the connecting groove 4 through the air inlet pipe 2. At this time, due to the strong pressure inside the sealing groove 105, the sealing plate 104 drives the sealing seat 6 to slide to the right through the connecting rod 103, the L rod 101 and the connecting rod 102, so that the sealing seat 6 is sealed and connected to the fixed seat 5 through the sealing gasket 62. Therefore, no gas passes through the user's air inlet pipe. By pressing the plug rod 14 downward, the friction between the plug rod 14 and the inner wall of the positioning groove 13 drives the sliding seat 11 to slide to the left. The sliding seat 11 drives the sealing seat 6 to slide to the left through the connecting plate 12. The sliding of the sliding seat 11 will drive the sealing seat 6 to slide away from the fixed seat 5. At this time, the gas enters the connecting groove 4 through the air inlet pipe 2, and then passes through the air hole 61 and the air outlet hole 51 through the air outlet The pipe 3 enters the user's air intake pipe. Since the interior of the connecting groove 4 is in a high pressure state at this time, the high-pressure gas enters the slide groove 7 through the connecting pipe 9. At this time, the pressure inside the slide groove 7 is greater than the pressure drop inside the sealing groove 105. The slider 8 drives the sealing plate 104 to slide to the left through the L rod 101 and the connecting rod 103. At the same time, the slider 8 drives the sealing seat 6 to slide to the left through the L rod 101 and the connecting rod 102. At this time, even if no external force is applied to the plug rod 14, the interior of the connecting groove 4 is still in a ventilation state. When the user's air intake pipe is deflated, the pressure inside the slide groove 7 is reduced, and the pressure inside the sealing groove 105 is greater than the pressure inside the slide groove 7. At this time, the sealing plate 104 slides to the right, and finally the sealing seat 6 is automatically sealed and fitted on the surface of the fixing seat 5, realizing the self-locking function of the valve, and the valve can only be opened by manually pressing the plug rod 14 again, which greatly reduces the risk of gas leakage and improves the safety during use;

[0046] By pulling the insertion rod 14 upward, when the insertion rod 14 is pulled upward to the top of the limit groove 15, the limit ring 16 can be driven to engage with the inside of the swivel 181, and then by rotating the insertion rod 14, the insertion rod 14 drives the driving gear 183 to rotate through the limit ring 16 and the swivel 181. Through the engagement of the driving gear 183 and the driven gear 184, the screw 185 can be rotated to achieve the up and down sliding of the adjustment plate 188, and the pressure inside the sealing groove 105 can be controlled, so that the sliding damping of the slider 8 can be adjusted according to the gas pressure intensity inside the intake pipe 2, so that after pressing the insertion rod 14, the gas pressure inside the connecting groove 4 enters the inside of the slide groove 7 through the connecting pipe 9, and the slider 8 can smoothly push the sealing seat 6 to slide to the left, so it can be installed and used in different scene environments, thereby enhancing applicability.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking protective gas valve, comprising a connecting groove (4), an air inlet pipe (2) arranged at the input end of the valve body (1), and an air outlet pipe (3) arranged at the output end of the valve body (1), characterized in that: The valve body (1) is provided with a connecting groove (4) inside, a fixing seat (5) is fixedly connected inside the connecting groove (4), a sealing seat (6) is slidably connected inside the connecting groove (4), a sliding groove (7) is provided inside the valve body (1), a sliding block (8) is sealingly slidably connected inside the sliding groove (7), a connecting pipe (9) is fixedly connected inside the valve body (1), a reset assembly (10) is installed inside the valve body (1), a sliding seat (11) is transversely slidably connected inside the valve body (1), and the bottom of the sliding seat (11) is The valve body (1) is fixedly connected to a connecting plate (12), one end of the connecting plate (12) away from the sliding seat (11) is fixedly connected to the surface of the sealing seat (6), a positioning groove (13) is provided inside the sliding seat (11), a plug rod (14) is inserted at the top center of the valve body (1), a limiting groove (15) is provided inside the valve body (1), a limiting ring (16) is fixedly sleeved on the outer surface of the plug rod (14), a spring (17) is movably installed inside the limiting groove (15), and a booster assembly (18) is installed inside the valve body (1).

2. A self-locking protective gas valve according to claim 1, characterized in that: The reset assembly (10) comprises an L-rod (101) fixedly connected to the surface of the slider (8); the end of the L-rod (101) away from the slider (8) is fixedly connected to a connecting rod (102); the end surface of the connecting rod (102) away from the L-rod (101) is fixedly connected to the center of the surface of the sealing seat (6); the surface of the L-rod (101) is fixedly connected to a connecting rod (103); the end surface of the connecting rod (103) is fixedly connected to a sealing plate (104); a sealing groove (105) is provided inside the valve body (1); a connecting pipe (106) is fixedly connected inside the valve body (1); and a rail rod (107) is inserted through the inside of the L-rod (101).

3. A self-locking protective gas valve according to claim 1, characterized in that: The boost assembly (18) comprises a rotating ring (181) and a silicone damping ring (182) fixedly connected to the inside of the valve body (1); a driving gear (183) is fixedly sleeved on the outer surface of the rotating ring (181); a driven gear (184) is meshingly connected to the surface of the driving gear (183); a screw (185) is fixedly connected to the inner center of the driven gear (184); a fixed bearing (186) is fixedly installed on the top of the outer surface of the screw (185); an adjusting chamber (187) is provided inside the valve body (1); an adjusting plate (188) is sealingly and slidably connected to the inside of the adjusting chamber (187); a vent pipe (189) is fixedly connected to the inside of the valve body (1); and a pressure gauge (1810) is fixedly installed inside the valve body (1).

4. A self-locking protective gas valve according to claim 1, characterized in that: The two ends of the interior of the communicating groove (4) are respectively connected to the interior of the air inlet pipe (2) and the air outlet pipe (3); the surface of the sealing seat (6) is provided with air holes (61) at equal intervals; the center of the interior of the fixing seat (5) is provided with an air outlet hole (51); and the surface of the sealing seat (6) close to the fixing seat (5) is fixedly connected with a sealing gasket (62).

5. A self-locking protective gas valve according to claim 2, characterized in that: The outer surface of the sealing plate (104) is sealingly slidably connected to the inside of the sealing groove (105), and the outer surface of the connecting rod (102) is movably inserted into the inner center of the air outlet hole (51).

6. A self-locking protective gas valve according to claim 2, characterized in that: A limiting hole (1011) is formed through the interior of the L-rod (101), and the L-rod (101) is slidably connected to the outer surface of the rail rod (107) through the limiting hole (1011), and both ends of the rail rod (107) are fixedly connected to the interior of the valve body (1).

7. A self-locking protective gas valve according to claim 3, characterized in that: The limiting ring (16) is hexagonal, and a hexagonal groove matching the limiting ring (16) is formed through the surface of the rotating ring (181).

8. The self-locking protective gas valve according to claim 3, characterized in that: The inner wall of the silicone damping ring (182) abuts against the surface of the rotating ring (181), the outer surface of the rotating ring (181) is rotatably connected to the inside of the valve body (1), and the outer surface of the driving gear (183) is rotatably connected to the inside of the valve body (1).

9. A self-locking protective gas valve according to claim 3, characterized in that: The outer surface of the screw rod (185) is threadedly engaged and rotatably connected to the inner center of the adjustment plate (188); a threaded hole matching the screw rod (185) is opened at the inner center of the adjustment plate (188); the inner top end of the adjustment cavity (187) is fixedly connected to a limit rod, and the outer surface of the limit rod is inserted into the interior of the adjustment plate (188).

10. A self-locking protective gas valve according to claim 1, characterized in that: The outer surface of the limiting ring (16) is slidably connected to the inside of the limiting groove (15); the end of the insertion rod (14) is arc-shaped; the positioning groove (13) is trapezoidal; the end of the insertion rod (14) abuts against the inner wall of the positioning groove (13).

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