An exhaust lock valve

Abstract

This utility model discloses an exhaust and airlock valve, comprising a fixed sleeve, an adjusting rod, a lifting component, a valve core, a valve core spring sleeved around the valve core, a valve nut, a valve housing fastened to the fixed sleeve and having an exhaust hole, and a valve tube penetrating its upper and lower sides through a hollow hole; the fixed sleeve has a first guide hole, a second chamber, and a first chamber communicating with the exhaust hole; the lifting component has a guide cylinder, a second guide hole, and a guide post passing through the first guide hole; the adjusting rod intersects the fixed sleeve at its middle part, its rear end is connected to the guide post, and its front end is connected to the control mechanism of the pressure cooker; the lower end of the valve tube passes through the fixed sleeve and is screwed together with the valve nut, and the hollow hole communicates with the inside of the pot through the valve nut; the upper end of the valve core is sleeved in the second guide hole and can slide up and down along it, the upper side of the valve core spring abuts against the top surface of the guide cylinder, and its lower end abuts against the lower end of the valve core. This valve has a simple structure, is easy to assemble, and has both exhaust and airlock functions, realizing the function of regulating the gas pressure inside the pressure cooker.

Description

Technical Field

[0001] This utility model relates to the field of kitchen cooking appliances technology, and in particular to an exhaust lock valve. Background Technology

[0002] Pressure cookers on the market are usually equipped with an exhaust valve. Existing exhaust valves are usually adjusted by elastic elements, but their structure is complex and difficult to assemble. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an exhaust lock valve.

[0004] This utility model is achieved through the following technical solution: an exhaust and airlock valve, installed on the lid of a pressure cooker, includes a fixed sleeve, an adjusting rod, a lifting component, a valve core, a valve core spring, a valve nut, a valve housing with an exhaust hole, and a valve tube through which the upper and lower sides are penetrated by a hollow hole; the fixed sleeve has a first guide hole, a first chamber, and a second chamber communicating with the first chamber, the first guide hole communicating the second chamber with the outside of the fixed sleeve; the lifting component has a guide cylinder at the bottom front end and a second guide hole penetrating the upper and lower sides of the front end, and a guide post at the bottom rear end of the lifting component; the valve housing is detachably fastened to the fixed sleeve, and the exhaust hole communicates with the first chamber; the lifting component is located below the valve housing. The guide cylinder is located in the first chamber, and the guide post passes through the first guide hole. The middle part of the adjusting rod is connected to the fixed sleeve, its rear end is connected to the guide post, and its front end is connected to the control mechanism of the pressure cooker and controlled by the control mechanism to lift or lower the guide post. The valve tube is located in the first chamber, and its lower end passes through the lower side of the fixed sleeve and is screwed together with the air valve nut. The hollow hole communicates with the inside of the pot through the air valve nut. The upper end of the valve core is sleeved in the second guide hole and can slide up and down along it. The valve core spring is sleeved on the outer periphery of the valve core, its upper side abuts against the top surface of the guide cylinder, and its lower end abuts against the lower end of the valve core, causing the valve core to open or close the hollow hole.

[0005] This valve uses a lever principle to adjust the valve core up and down via an adjusting rod, thereby achieving the functions of venting or locking the air. The adjusting rod controls the guide column to move up and down, which in turn drives the front end of the lifting component to move up and down, thus changing the control force on the lower end of the valve core. When the valve core rises, it opens the hollow hole, allowing the gas inside the pot to be discharged outside the pot through the valve nut, the hollow hole, the first chamber, and the vent, thereby achieving the venting function. When the lifting component descends, the valve core descends, thereby closing the hollow hole and achieving the locking the air function.

[0006] A first-stage ring is provided on the fixing sleeve around the outer periphery of the first chamber and the second chamber, and a locking slot is provided on the outer periphery of the first-stage ring; a buckle is provided on the outer periphery of the valve housing, and the valve housing is embedded in the first-stage ring, with the buckle fastening the locking slot. The cooperation between the buckle and the locking slot allows for the detachable installation of the valve housing and the fixing sleeve, and the valve housing being embedded in the first-stage ring ensures that the connection between the two is flush.

[0007] The outer periphery of the first stage is recessed downwards to form a first positioning groove. A first sealing ring is installed in the first positioning groove, and the upper side of the first sealing ring abuts against the lower side of the valve housing. The first sealing ring ensures a seal between the valve housing and the fixing sleeve.

[0008] The upper outer circumference of the valve core protrudes to form a first annular protrusion, and the lower outer circumference of the valve core protrudes outward to form a second annular protrusion. A lifting element around the second guide hole forms a second-stage ring. The diameter of the first annular protrusion is larger than the diameter of the second guide hole. When the lifting element is raised, the lower side of the first annular protrusion abuts against the second-stage ring. The lower end of the valve core spring abuts against the second annular protrusion. The first annular protrusion prevents the upper end of the valve core from disengaging from the second guide hole, and the second-stage ring blocks the downward movement of the first annular protrusion.

[0009] The guide column has a pair of symmetrical limiting grooves on both sides of its lower section; the rear end of the adjusting rod has a U-shaped tail fork that inserts into the limiting grooves. The cooperation between the tail fork and the limiting grooves allows the guide column to be raised or lowered when the adjusting rod is moved.

[0010] The upper section of the guide post has an inwardly recessed outer periphery forming a second positioning groove. A second sealing ring is installed within the second positioning groove, with its outer surface tightly against the inner wall of the first guide hole. The second sealing ring ensures a seal between the guide post and the first guide hole, preventing gas in the first and second chambers from flowing out of the first guide hole to other areas.

[0011] The fixed sleeve has a mounting groove at its rear end, and a pair of first positioning holes are symmetrically provided on the opposite wall of the mounting groove; the adjusting rod has a second positioning hole in its middle part; it also includes a fixed shaft, which passes through the first positioning hole, the second positioning hole on one side, and the first positioning hole on the other side in sequence; the middle part of the adjusting rod is located in the mounting groove and can rotate in the groove.

[0012] The fixed shaft has a through groove at its front end, forming a fork. A pair of limiting members are provided on each of the outer walls of the fork, with an inclined transition surface between the front side of each limiting member and the outer wall of the fork. The distance between the outer sides of the two limiting members is greater than the diameter of the first positioning hole. The fork design allows the fixed shaft to be pushed inwards as it passes through the first and second positioning holes, enabling the limiting members to pass through both holes. When the limiting members pass through the last first positioning hole, the fork structure returns to its original state, and the limiting members protrude outwards, preventing them from slipping out of the first positioning hole and achieving a rotatable connection of the fixed shaft.

[0013] The hollow outlet forms a conical hole, and the lower end face of the valve core has a hemispherical structure. Under the action of the valve core spring, the hemispherical structure of the valve core is embedded into the conical hole. The valve core is a downward-opening cylindrical structure. The hemispherical structure of the lower side of the valve core can form a sealed fit with the hollow outlet of the conical hole, achieving the airlock function. As the valve core is a downward-opening cylindrical structure, when the pressure inside the pot is too high, the gas impacts the cylindrical structure of the valve core, thereby lifting the valve core and achieving the venting function.

[0014] The valve nut has a third-stage sealing ring between the top of its internal threaded hole and its inner sidewall, and the third-stage sealing ring is fitted onto the third-stage sealing ring. The third sealing ring can form a seal between the valve nut and the pot lid.

[0015] Compared with the prior art, the advantages of this utility model are as follows: This exhaust and air-lock valve is controlled by the control mechanism of the pressure cooker to push the adjusting rod to rotate, control the guide column to rise and fall, and drive the lifting component to rise and fall, thereby changing the control force on the valve core, thus realizing the exhaust or air-locking function; the valve body has a simple structure, is easy to assemble, and has both exhaust and air-locking functions, realizing the function of regulating the air pressure inside the pressure cooker. Attached Figure Description

[0016] Figure 1 This is a front view sectional view of the present invention in the exhaust state, taken along the longitudinal direction.

[0017] Figure 2 This is a perspective sectional view of the present invention in the exhaust state, taken along the longitudinal direction.

[0018] Figure 3 This is an exploded view of the structure of this utility model;

[0019] Figure 4 for Figure 3 A sectional view taken along the longitudinal direction;

[0020] Figure 5 This is an exploded view of the structure in the main view of an embodiment of this utility model;

[0021] Figure 6 for Figure 5 A sectional view taken along the longitudinal direction;

[0022] Figure 7 This is a cross-sectional view of the embodiment of the present invention in the airlock state.

[0023] The meanings of the reference numerals in the attached diagram are as follows: 1. Fixing sleeve; 11. First guide hole; 12. First chamber; 13. Second chamber; 14. First stage; 15. Bayonet; 16. First positioning groove; 17. First sealing ring; 18. Mounting groove; 19. First positioning hole; 2. Adjusting rod; 21. Tail fork; 22. Second positioning hole; 3. Lifting component; 31. Guide cylinder; 32. Second guide hole; 33. Guide post; 34. Second stage; 35. Limiting groove; 36. Second positioning groove; 37. Second sealing ring; 4. Valve core; 41. First annular protrusion; 42. Second annular protrusion; 5. Valve core spring; 6. Air valve nut; 61. Third position; 62. Third sealing ring; 7. Air valve housing; 71. Exhaust port; 72. Buckle; 8. Valve tube; 81. Hollow hole; 82. Tapered hole; 9. Fixed shaft; 91. Through groove; 92. Front fork; 93. Limiting component. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Example

[0026] See Figures 1 to 7This is an exhaust and airlock valve installed on the lid of a pressure cooker. It includes a fixed sleeve 1, an adjusting rod 2, a lifting component 3, a valve core 4, a valve core spring 5, a valve nut 6, a valve housing 7 with an exhaust hole 71, and a valve tube 8 through which the upper and lower sides are penetrated by a hollow hole 81. The fixed sleeve 1 has a first guide hole 11, a first chamber 12, and a second chamber 13 communicating with the first chamber 12. The first guide hole 11 connects the second chamber 13 to the outside of the fixed sleeve 1. The lifting component 3 has a guide cylinder 31 at its bottom front end and a second guide hole 32 penetrating the upper and lower sides of the front end. The lifting component 3 has a guide post 33 at its bottom rear end. The valve housing 7 is detachably fastened to the fixed sleeve 1, and the exhaust hole 71 communicates with the first chamber 12. Located below the valve housing 7, the guide cylinder 31 is located in the first chamber 12, and the guide post 33 passes through the first guide hole 11; the middle part of the adjusting rod 2 is connected to the fixed sleeve 1, its rear end is connected to the guide post 33, and its front end is connected to the control mechanism of the pressure cooker and controlled by it to lift or lower the guide post 33; the valve tube 8 is located in the first chamber 12, and its lower end passes through the lower side of the fixed sleeve 1 and is screwed together with the valve nut 6, and the hollow hole 81 communicates with the inside of the pot through the valve nut 6; the upper end of the valve core 4 is sleeved in the second guide hole 32 and can slide up and down along it, and the valve core spring 5 is sleeved on the outer circumference of the valve core 4, its upper side abuts against the top surface of the guide cylinder 31, and its lower end abuts against the lower end of the valve core 4 and opens or closes the hollow hole 81 of the valve core 4.

[0027] This valve is designed using a lever principle. The adjusting rod 2 controls the valve core 4 to move up and down, thereby achieving the functions of venting or locking the air. The adjusting rod 2 controls the guide column 33 to move up and down. The guide column 33 drives the front end of the lifting component 3 to move up and down, which changes the control force on the lower end of the valve core 4. When the valve core 4 rises, it opens the hollow hole 81, allowing the gas in the pot to be discharged outside the pot through the air valve nut 6, the hollow hole 81, the first chamber 12, and the vent hole 71, thereby achieving the venting function. When the lifting component 3 descends, the valve core 4 descends, thereby closing the hollow hole 81 and achieving the locking the air function.

[0028] A first-stage position 14 is provided on the fixing sleeve 1 around the outer periphery of the first chamber 12 and the second chamber 13, and a locking slot 15 is provided on the outer periphery of the first-stage position 14; a buckle 72 is provided on the outer periphery of the valve housing 7, and the valve housing 7 is embedded in the first-stage position 14, with the buckle 72 fastening the locking slot 15. The cooperation between the buckle 72 and the locking slot 15 allows for the detachable installation of the valve housing 7 and the fixing sleeve 1, and the valve housing 7 is embedded in the first-stage position 14 so that the connection between the two is flush.

[0029] The first positioning groove 16 is formed by a downward-facing indentation on the outer periphery of the first positioning position 14. A first sealing ring 17 is installed in the first positioning groove 16, and the upper side of the first sealing ring 17 abuts against the lower side of the valve housing 7. The first sealing ring 17 ensures a seal between the valve housing 7 and the fixing sleeve 1.

[0030] A first annular protrusion 41 protrudes from the outer periphery of the upper end of the valve core 4, and a second annular protrusion 42 protrudes outward from the outer periphery of the lower section of the valve core 4. A second stage 34 is formed by the lifting member 3 around the second guide hole 32. The diameter of the first annular protrusion 41 is larger than the diameter of the second guide hole 32. When the lifting member 3 rises, the lower side of the first annular protrusion 41 abuts against the second stage 34. The lower end of the valve core spring 5 abuts against the second annular protrusion 42. The first annular protrusion 41 prevents the upper end of the valve core 4 from disengaging from the second guide hole 32, and the second stage 34 restricts the downward movement of the first annular protrusion 41.

[0031] A pair of limiting grooves 35 are symmetrically provided on both sides of the lower section of the guide column 33; a U-shaped tail fork 21 is provided at the rear end of the adjusting rod 2, and the tail fork 21 is inserted into the limiting groove 35. The cooperation between the tail fork 21 and the limiting groove 35 enables the guide column 33 to be raised and lowered when the adjusting rod 2 is turned.

[0032] The upper circumference of the guide post 33 is recessed inward to form a second positioning groove 36. A second sealing ring 37 is installed in the second positioning groove 36, and the outer side of the second sealing ring 37 is in close contact with the inner wall of the first guide hole 11. The second sealing ring 37 provides a seal between the guide post 33 and the first guide hole 11, preventing gas in the first chamber 12 and the second chamber 13 from flowing out of the first guide hole 11 to other places.

[0033] The fixed sleeve 1 has a mounting groove 18 at its rear end, and a pair of first positioning holes 19 are symmetrically provided on the opposite side wall of the mounting groove 18; the adjusting rod 2 has a second positioning hole 22 in the middle; it also includes a fixed shaft 9, which passes through the first positioning hole 19, the second positioning hole 22 on one side, and the first positioning hole 19 on the other side in sequence; the middle part of the adjusting rod 2 is located in the mounting groove 18 and can rotate in the groove.

[0034] The fixed shaft 9 has a through groove 91 at its front end, forming a fork 92. A pair of limiting members 93 are provided on the outer walls of both sides of the fork 92. There is an inclined transition surface between the front side of the limiting member 93 and the outer wall of the fork 92. The distance between the outer sides of the two limiting members 93 is greater than the diameter of the first positioning hole 19. The fork 92 allows the fixed shaft 9 to be pressed inwards when it passes through the first positioning hole 19 and the second positioning hole 22, allowing the limiting member 93 to pass through both positioning holes. When the limiting member 93 passes through the last first positioning hole 19, the fork 92 returns to its original state, and the limiting member 93 protrudes outwards, thus preventing it from slipping out of the first positioning hole 19 and achieving the rotational connection of the fixed shaft 9.

[0035] The hollow hole 81 outlet forms a conical hole 82. The lower end face of the valve core 4 has a hemispherical structure. Under the action of the valve core spring 5, the hemispherical structure of the valve core 4 is embedded into the conical hole 82. The valve core 4 is a cylindrical structure with a downward opening. The hemispherical structure of the lower side of the valve core 4 can form a sealed fit with the outlet of the hollow hole 81 of the conical hole 82, realizing the air-locking function. The valve core 4 is a cylindrical structure with a downward opening. When the pressure inside the pot is too high, the gas impacts the cylindrical structure of the valve core 4, thereby lifting the valve core 4 and realizing the venting function.

[0036] The valve nut 6 has a third-stage stop 61 between the top of its internal threaded hole and its inner sidewall, and a third sealing ring 62 is fitted on the third-stage stop 61. The third sealing ring 62 can form a seal between the valve nut 6 and the pot lid.

[0037] In this embodiment, the pressure cooker lid includes an upper lid and a lower lid. The lower lid is held between the fixing sleeve 1 and the valve nut 6, and the upper lid is fitted onto the fixing sleeve 1. In this embodiment, the guide cylinder 31 of the lifting component 3 is composed of two symmetrically arranged plate-like structures, and the valve core 4 is located between the two plate-like structures. The control mechanism of the pressure cooker connected to the front end of the adjusting rod 2 is not the object of protection in this application; it is an external structure and does not require detailed structural analysis.

[0038] Assembly in this embodiment:

[0039] 1) Place the valve tube 8 above the fixed sleeve 1, pass the valve tube 8 through the first chamber 12 from top to bottom, pass its lower end through the lower side of the fixed sleeve 1 and then through the lower cover of the pressure cooker and tighten it on the air valve nut 6. The third sealing ring 62 is clamped between the lower cover and the air valve nut 6 to form a seal.

[0040] 2) Place the valve core spring 5 above the valve core 4, and thread the valve core spring 5 through the outer circumference of the valve core 4 from top to bottom;

[0041] 3) Place the valve core 4 below the lifting component 3, and insert the valve core 4 into the position set by the lifting component 3 (inside the second guide hole 32) from bottom to top;

[0042] 4) Place the second sealing ring 37 below the lifting component 3, and thread the second sealing ring 37 through the lifting component 3 at the set position (second positioning groove 36 of guide column 33) from bottom to top;

[0043] 5) Place the lifting component 3 above the fixed sleeve 1, and insert the lifting component 3 into the fixed sleeve 1 at the set position (first chamber 12 and second chamber 13) from top to bottom, with the guide post 33 passing through the first guide hole 11;

[0044] 6) Place the adjusting rod 2 on the rear side of the lifting component 3, and use the tail fork 21 set on the adjusting rod 2 to fork in the limiting groove 35 of the guide column 33 of the lifting component 3; and make the second positioning hole 22 set on the adjusting rod 2 concentric with the first positioning hole 19 of the fixed sleeve 1, and then use the fixed shaft 9 to pass through the concentric holes (first positioning hole 19 and second positioning hole 22) to connect the adjusting rod 2 and the fixed sleeve 1 together;

[0045] 7) Place the first sealing ring 17 above the fixed sleeve 1, and clamp the first sealing ring 17 into the first positioning groove 16 set in the fixed sleeve 1 from top to bottom;

[0046] 8) Place the valve housing 7 on top of the fixing sleeve 1, and fasten the valve housing 7 to the fixing sleeve 1 from top to bottom through the inverted buckle (clasp 72) set in the valve housing 7. The buckle 72 is locked in the bayonet 15.

[0047] 9) Place the third sealing ring 62 above the valve nut 6, and from top to bottom, snap the third sealing ring 62 into the groove (third position 61) set in the valve nut 6, and screw the valve nut 6 onto the valve tube 8.

[0048] The principle of this embodiment:

[0049] 1) When the adjusting rod 2 is rotated clockwise from the exhaust state, the tail fork 21 of the adjusting rod 2 drives the lifting component 3 to move downward. During the descent of the lifting component 3, the valve core 4 is pressed down by the valve core spring 5, so that the valve core 4 blocks the hollow hole 81 in the center of the valve tube 8, thus completing the conversion from the exhaust state to the airlock state.

[0050] 2) When the adjusting rod 2 is rotated counterclockwise from the airlock state, the tail fork 21 of the adjusting rod 2 drives the lifting component 3 to rise. During the rise of the lifting component 3, the compression force of the valve core spring 5 gradually decreases. When the pressure in the valve pipe 8 is greater than the spring force, the gas in the valve pipe 8 pushes up the valve core 4 and discharges the gas. The lifting component 3 continues to rise. When the upper plane of the lifting component 3 (second stage position 34) contacts the latch of the valve core 4 (first annular protrusion 41), the lifting component 3 can quickly drive the valve core 4 to rise to achieve rapid exhaust.

[0051] The innovation of this embodiment is:

[0052] 1) The valve core 4 is adjusted up and down by designing the adjusting rod 2 based on the lever principle;

[0053] 2) It adopts a modular design, and the gas valve can be installed as an independent unit on various pressure cookers, which is highly practical and has a wide range of applications.

[0054] The above detailed description is a specific description of a feasible embodiment of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. All equivalent implementations or modifications that do not depart from the present utility model should be included in the patent scope of this case.

Claims

1. An exhaust trap valve installed on a lid of a pressure cooker, characterized in that: The system includes a fixed sleeve, an adjusting rod, a lifting component, a valve core, a valve core spring, a valve nut, a valve housing with an exhaust port, and a valve tube with a hollow hole penetrating its upper and lower sides. The fixed sleeve has a first guide hole, a first chamber, and a second chamber communicating with the first chamber; the first guide hole connects the second chamber to the outside of the fixed sleeve. The lifting component has a guide cylinder at its bottom front end and a second guide hole penetrating its upper and lower front sides; the lifting component has a guide post at its bottom rear end. The valve housing is detachably fastened to the fixed sleeve, and the exhaust port communicates with the first chamber. The lifting component is located below the valve housing, and the guide cylinder is located inside the first chamber. The guide post passes through the first guide hole; the middle part of the adjusting rod intersects with the fixed sleeve, its rear end is connected to the guide post, and its front end is connected to the control mechanism of the pressure cooker and controlled by the control mechanism to lift or lower the guide post; the valve tube is located in the first chamber, its lower end passes through the lower side of the fixed sleeve and is screwed together with the air valve nut, and the hollow hole communicates with the inside of the pot through the air valve nut; the upper end of the valve core is sleeved in the second guide hole and can slide up and down along it, the valve core spring is sleeved on the outer periphery of the valve core, its upper side abuts against the top surface of the guide cylinder, its lower end abuts against the lower end of the valve core and causes the valve core to open or close the hollow hole.

2. The exhaust gas trap valve according to claim 1, characterized in that: A first-stage position is provided on the fixing sleeve around the outer periphery of the first chamber and the second chamber, and a snap is provided on the outer periphery of the first-stage position; a buckle is provided on the outer periphery of the air valve housing, and the air valve housing is embedded in the first-stage position, and the buckle is fastened to the snap.

3. The exhaust lock valve according to claim 2, characterized in that: The outer periphery of the first stage is recessed downward to form a first positioning groove, and a first sealing ring is installed in the first positioning groove. The upper side of the first sealing ring abuts against the lower side of the valve housing.

4. The exhaust lock valve according to claim 1, characterized in that: The upper outer periphery of the valve core protrudes to form a first annular protrusion, and the lower outer periphery of the valve core protrudes outward to form a second annular protrusion; the lifting component around the second guide hole forms a second stage, the diameter of the first annular protrusion is larger than the diameter of the second guide hole, and after the lifting component is raised, the lower side of the first annular protrusion abuts against the second stage; the lower end of the valve core spring abuts against the second annular protrusion.

5. The exhaust lock valve according to claim 1, characterized in that: A pair of limiting grooves are symmetrically opened on both sides of the lower section of the guide column; a U-shaped tail fork is provided at the rear end of the adjusting rod, and the tail fork is inserted into the limiting groove.

6. The exhaust lock valve according to claim 1, characterized in that: The upper section of the guide post has an inwardly recessed outer periphery forming a second positioning groove. A second sealing ring is installed in the second positioning groove, and the outer side of the second sealing ring is in close contact with the inner wall of the first guide hole.

7. The exhaust lock valve according to claim 1, characterized in that: The fixed sleeve has a mounting groove at its rear end, and a pair of first positioning holes are symmetrically provided on the opposite wall of the mounting groove; the adjusting rod has a second positioning hole in its middle part; it also includes a fixed shaft, which passes through the first positioning hole, the second positioning hole on one side, and the first positioning hole on the other side in sequence; the middle part of the adjusting rod is located in the mounting groove and can rotate in the groove.

8. The exhaust lock valve according to claim 7, characterized in that: The fixed shaft has a through groove at its front end, which forms a front fork. A pair of limiting members are provided on the outer wall of each side of the front fork. There is an inclined transition surface between the front side of the limiting member and the outer wall of the front fork. The distance between the outer sides of the two limiting members is greater than the diameter of the first positioning hole.

9. The exhaust lock valve according to claim 1, characterized in that: The hollow hole outlet forms a conical hole, and the lower end face of the valve core is a hemispherical structure. Under the action of the valve core spring, the hemispherical structure of the valve core is embedded in the conical hole; the valve core is a cylindrical structure with a downward opening.

10. The exhaust lock valve according to claim 1, characterized in that: The valve nut has a third-stage position between the top of the internal threaded hole and its inner sidewall, and a third sealing ring is fitted on the third-stage position.

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