Self-sealing high-temperature and high-pressure stop valve

Abstract

The invention relates to the technical field of valves, in particular to a self-sealing high-temperature and high-pressure stop valve which comprises a valve body, a first threaded rod is connected to the upper portion of the interior of the valve body in a threaded mode, a handle is fixedly connected to the outer wall of the top of the first threaded rod, the outer wall of the bottom of the handle movably makes contact with the outer wall of the top of the valve body, and a valve element is fixedly connected to the interior of the valve body. A piston rod is movably inserted into the inner wall of the valve element, and a mounting seat is fixedly connected to the outer wall of the top of the piston rod; the sealing device has the beneficial effects that the sealing block is protected in a closed space, the situation that the sealing block is still exposed in the valve body when the piston rod is in a closed state, the sealing block is affected by the internal environment of the valve body, and aging of the sealing block is increased is avoided, correspondingly, through cooperation of the sealing block and the protection shell, the sealing block can be protected when not used, and the service life of the sealing block is prolonged. Therefore, contact between the sealing block and the internal environment of the valve body is reduced, the aging process of the sealing block is reduced, and the service life of the sealing block is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of valves, in particular to a self-sealing high-temperature and high-pressure stop valve. Background Art

[0002] The self-sealing high-temperature and high-pressure stop valve is a valve specially designed to work under high-temperature and high-pressure conditions. Its core feature is that it can maintain good sealing performance in extreme environments while having reliable switching functions.

[0003] The working principle of the self-sealing high-temperature and high-pressure globe valve is based on a pressure balance and seal compensation mechanism. When the medium passes through the valve, the high pressure will generate additional pressure on the sealing part, making the contact between the seal and the valve seat closer, thereby achieving a better sealing effect. This design is not only suitable for normal working conditions, but also can maintain sealing performance in emergency situations.

[0004] The patent application publication number CN219606131U discloses a self-sealing high-temperature and high-pressure stop valve. The sampling unit of this valve can realize dynamic sampling and determine the parameters of the fluid medium in the flow channel through internal sampling. There is no need to disassemble the pipeline connected to the flow channel, which is very convenient.

[0005] In the prior art, the sealing structure inside the self-sealing high-temperature and high-pressure stop valve is still exposed inside the valve body when not in use. When affected by the internal environment of the valve body, the aging of the sealing structure is increased, thereby shortening the service life of the sealing structure. Summary of the Invention

[0006] The object of the present invention is to provide a self-sealing high-temperature and high-pressure stop valve to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: the self-sealing high-temperature and high-pressure stop valve comprises: a valve body, a threaded rod 1 is connected to the upper part of the inside of the valve body, the outer wall of the top of the threaded rod 1 is fixedly connected to a handle, the outer wall of the bottom of the handle is in movably contact with the outer wall of the top of the valve body, the inside of the valve body is fixedly connected to a valve core, a piston rod is movably inserted into the inner wall of the valve core, the outer wall of the top of the piston rod is fixedly connected to a mounting seat, the inside of the mounting seat is rotatably connected to the outer wall of the bottom of the threaded rod 1, a sealing protection assembly is provided inside the valve body, the sealing protection assembly comprises a protective shell, a sealing block and a telescopic plate, and the outer wall of the protective shell is fixedly connected to the upper part of the inner wall of the valve body.

[0008] Preferably, the interior of the top of the protective shell is fixedly connected to the outer wall of the top of the telescopic plate, the inner wall of the protective shell is fixedly connected to the outer wall of the sealing block, and the inner wall of the sealing block is in movable contact with the outer wall of the telescopic plate.

[0009] Preferably, the inner wall of the top of the protective shell is rotatably connected to the winding wheel, and the outer walls of the bottom of the two winding wheels are fixedly connected to the threaded rod 2, the outer wall of the threaded rod 2 is located below the winding wheel and rotatably connected to the limiting shell, the outer wall of the top of the limiting shell is provided with a circular hole, the inside of the circular hole is fixedly connected to the cylindrical shell, the inside of the cylindrical shell is slidably connected to the rope, the outer wall of the bottom of the rope is fixedly connected to the inner wall of the bottom of the telescopic plate, the outer wall of the top of the piston rod is provided with all threaded holes, the inside of the threaded hole is threadedly connected to the outer wall of the threaded rod 2, and the outer wall of one end of the rope is rope-wound and connected to the outer wall of the winding wheel.

[0010] Preferably, an inner cavity is opened inside the limiting shell, the outer wall on one side of the inner cavity is connected with the outer wall on one side of the cylindrical shell, a through hole is opened on the inner wall of the cylindrical shell, a ball is rotatably connected inside the through hole, and the outer wall of the ball is in active contact with the outer wall of the rope.

[0011] Preferably, an arcuate ring is fixedly connected to the outer wall of the top of the cylindrical shell, and the outer wall of the top of the arcuate ring is in movable contact with the outer wall of the rope.

[0012] Preferably, an L-shaped push rod is fixedly connected to the lower part of the outer wall of the piston rod, and a slide groove 1 is opened on the inner wall of the valve core at the position of the L-shaped push rod, and the interior of the slide groove 1 is slidably connected to the outer wall of the L-shaped push rod.

[0013] Preferably, a placement groove is provided below the inner wall of the valve core, the inner wall of the placement groove is fixedly connected to a reset spring 1, the outer wall of one end of the reset spring 1 is fixedly connected to an arc-shaped sealing gasket, the outer wall of the arc-shaped sealing gasket is in movably contact with the inner wall of the placement groove, the inner wall of the arc-shaped sealing gasket is in movably contact with the outer wall of the piston rod, and the inner wall of the L-shaped push rod is in movably contact with the outer wall of the arc-shaped sealing gasket.

[0014] Preferably, the interior of the piston rod is fixedly connected to an exhaust duct, the inner wall of the exhaust duct is fixedly connected to a mounting plate, the outer wall of the bottom of the mounting plate is fixedly connected to a second reset spring, the outer wall of the bottom of the second reset spring is fixedly connected to a floating shell, and the outer wall of the floating shell is provided with an air inlet groove.

[0015] Preferably, the outer wall of the exhaust duct bottom is provided with a second slide groove, the inner wall of the second slide groove is slidably connected with a movable plate, the outer wall of the exhaust duct is provided with a second air inlet groove, and the outer wall of the movable plate is slidably connected to the outer wall of the second air inlet groove.

[0016] Preferably, a channel is provided inside the threaded rod 1, and an exhaust hole is provided above the outer wall of the threaded rod 1.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a self-sealing high-temperature and high-pressure stop valve, which protects the sealing block in a closed space to avoid the sealing block being exposed to the interior of the valve body when the piston rod is in a closed state, thereby increasing the aging of the sealing block under the influence of the internal environment of the valve body. Accordingly, through the cooperation of the sealing block and the protective shell, the sealing block can be protected when not in use, thereby reducing the contact between the sealing block and the internal environment of the valve body, reducing the aging process of the sealing block, and thus increasing the service life of the sealing block. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the present invention; Figure 3 This is a schematic diagram of the piston rod structure of the present invention; Figure 4 This is a schematic diagram of the valve core structure of the present invention; Figure 5 Schematic diagram of the exhaust duct structure of the present invention; Figure 6 For the present invention Figure 2 A is an enlarged structural diagram; Figure 7 This is a schematic diagram of the L-shaped push rod structure of the present invention; Figure 8 For the present invention Figure 3 The enlarged structural diagram at location B; Figure 9 Schematic diagram of the limiting shell structure of the present invention; Figure 10 For the present invention Figure 5 The enlarged structural diagram at location C; Figure 11 This is a structural diagram of the second chute of the present invention; Figure 12 For the present invention Figure 1 The enlarged structural diagram at D is shown; Figure 13 This is a schematic structural diagram of a cross-sectional view of a threaded rod of the present invention.

[0018] In the figure: 1. Valve body; 11. Handle; 12. Valve core; 13. Piston rod; 14. Threaded rod 1; 2. Protective shell; 21. Sealing block; 22. Telescopic plate; 3. Arc-shaped sealing gasket; 31. L-shaped push rod; 32. Return spring 1; 33. Placement groove; 34. Slide groove 1; 4. Exhaust duct; 41. Mounting plate; 42. Return spring 2; 43. Floating shell; 44. Slide groove 2; 45. Moving plate; 46. Air inlet groove 1; 47. Air inlet groove 2; 48. Exhaust hole; 49. Channel; 5. Reel; 51. Threaded rod 2; 52. Rope; 53. Limit shell; 531. Inner cavity; 532. Ball; 533. Cylindrical shell; 534. Arc ring; 54. Threaded hole. DETAILED DESCRIPTION

[0019] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] For example 1, please refer to Figure 1 - Figure 13 The present invention provides a technical solution for a self-sealing high-temperature and high-pressure stop valve: the self-sealing high-temperature and high-pressure stop valve comprises: a valve body 1, a threaded rod 14 is threadedly connected to the upper part of the interior of the valve body 1, and a handle 11 is fixedly connected to the outer wall of the top of the threaded rod 14, and the outer wall of the bottom of the handle 11 is movably in contact with the outer wall of the top of the valve body 1, a valve core 12 is fixedly connected to the interior of the valve body 1, a piston rod 13 is movably inserted into the inner wall of the valve core 12, and the outer wall of the top of the piston rod 13 is fixedly connected to a mounting seat, and the inner part of the mounting seat is rotatably connected to the outer wall of the bottom of the threaded rod 14, and a sealing protection component is provided inside the valve body 1, the sealing protection component comprises a protective shell 2, a sealing block 21 and a telescopic plate 22, the outer wall of the protective shell 2 is fixedly connected to the upper part of the inner wall of the valve body 1, the inner part of the top of the protective shell 2 is fixedly connected to the outer wall of the top of the telescopic plate 22, the inner wall of the protective shell 2 is fixedly connected to the outer wall of the sealing block 21, and the inner wall of the sealing block 21 is movably in contact with the outer wall of the telescopic plate 22.

[0021] By protecting the sealing block 21 in a closed space, the sealing block 21 is prevented from being exposed to the inside of the valve body 1 when the piston rod 13 is in the closed state, and the aging of the sealing block 21 is increased by the influence of the internal environment of the valve body 1. Accordingly, through the cooperation of the sealing block 21 and the protective shell 2, the sealing block 21 can be protected when not in use, thereby reducing the contact between the sealing block 21 and the internal environment of the valve body 1, reducing the aging process of the sealing block 21, and thus increasing the service life of the sealing block 21.

[0022] Example 2. On the basis of Example 1, the inner wall of the top of the protective shell 2 is rotatably connected to the winding wheel 5, and the outer wall of the bottom of the two winding wheels 5 is fixedly connected to the threaded rod 2 51. The outer wall of the threaded rod 2 51 is located below the winding wheel 5 and is rotatably connected to the limiting shell 53. A circular hole is provided on the outer wall of the top of the limiting shell 53, and a cylindrical shell 533 is fixedly connected to the inside of the circular hole. A rope 52 is slidably connected to the inside of the cylindrical shell 533. The outer wall of the bottom of the rope 52 is fixedly connected to the inner wall of the bottom of the telescopic plate 22. A threaded hole 54 is provided on the outer wall of the top of the piston rod 13, and the inside of the threaded hole 54 is threadedly connected to the outer wall of the threaded rod 2 51. The outer wall of one end of the rope 52 is rope-wound and connected to the outer wall of the winding wheel 5.

[0023] The telescopic plate 22 is driven upward by the rope 52 to expose the sealing block 21 inside the protective shell 2. Without the telescopic plate 22 to intercept the sealing block 21, the sealing block 21 can be extended from the inside of the protective shell 2 and fit closely with the outer wall of the piston rod 13 when the sealing block 21 is released, thereby increasing the tightness between the piston rod 13 and the inner wall of the valve body 1, avoiding poor sealing effect and liquid leakage when the piston rod 13 is in the open state. Accordingly, through the close fit between the piston rod 13 and the sealing block 21, a good sealing effect can be maintained when the piston rod 13 is in the open state.

[0024] Example three, on the basis of Example two, an inner cavity 531 is opened inside the limiting shell 53, the outer wall on one side of the inner cavity 531 is connected through the outer wall on one side of the cylindrical shell 533, a through hole is opened on the inner wall of the cylindrical shell 533, a ball 532 is rotatably connected inside the through hole, the outer wall of the ball 532 is in movable contact with the outer wall of the rope 52, the outer wall of the top of the cylindrical shell 533 is fixedly connected with an arc ring 534, and the outer wall of the top of the arc ring 534 is in movable contact with the outer wall of the rope 52.

[0025] The cooperation between the limiting shell 53 and the cylindrical shell 533 allows the portion of the rope 52 below the limiting shell 53 to be limited during the movement of the rope 52, thereby preventing the rope 52 from shaking during the movement, which may cause the rope 52 to be unstable when pulling the telescopic plate 22. This increases the stability of the rope 52 during the movement, making the telescopic plate 22 work more smoothly. The arc ring 534 provided on the top of the cylindrical shell 533 prevents the rope 52 from directly contacting the sharp corners of the cylindrical shell 533 at the bend. Accordingly, the arc ring 534 is made arc-shaped, which can reduce the wear of the rope 52 when the arc ring 534 contacts the rope 52, thereby increasing the service life of the rope 52. The material of the arc ring 534 is soft, which can reduce the heat accumulation and wear of the rope 52 caused by friction during the sliding process.

[0026] Embodiment 4, on the basis of embodiment 3, an L-shaped push rod 31 is fixedly connected to the lower part of the outer wall of the piston rod 13, a slide groove 34 is provided on the inner wall of the valve core 12 at the position of the L-shaped push rod 31, the interior of the slide groove 34 is slidably connected to the outer wall of the L-shaped push rod 31, a placement groove 33 is provided below the inner wall of the valve core 12, a return spring 32 is fixedly connected to the inner wall of the placement groove 33, an arc-shaped sealing gasket 3 is fixedly connected to the outer wall of one end of the return spring 32, the outer wall of the arc-shaped sealing gasket 3 is in movable contact with the inner wall of the placement groove 33, the inner wall of the arc-shaped sealing gasket 3 is in movable contact with the outer wall of the piston rod 13, and the inner wall of the L-shaped push rod 31 is in movable contact with the outer wall of the arc-shaped sealing gasket 3.

[0027] By increasing the sealing between the piston rod 13 and the valve core 12, liquid is prevented from flowing out through the tiny gap between the piston rod 13 and the valve core 12 when the piston rod 13 is in the closed state, and the effect between the valve core 12 and the piston rod 13 is correspondingly increased, so that the piston rod 13 has better sealing when it is in the closed state.

[0028] Embodiment 5, on the basis of embodiment 3, the interior of the piston rod 13 is fixedly connected with the exhaust duct 4, the inner wall of the exhaust duct 4 is fixedly connected with the mounting plate 41, the outer wall of the bottom of the mounting plate 41 is fixedly connected with the return spring 2 42, the outer wall of the bottom of the return spring 2 42 is fixedly connected with the floating shell 43, the outer wall of the floating shell 43 is provided with an air intake groove 1 46, the outer wall of the bottom of the exhaust duct 4 is provided with a slide groove 2 44, the inner wall of the slide groove 2 44 is slidably connected with a movable plate 45, the outer wall of the exhaust duct 4 is provided with an air intake groove 2 47, the outer wall of the movable plate 45 is slidably connected to the outer wall of the air intake groove 2 47, the interior of the threaded rod 14 is provided with a channel 49, and the upper part of the outer wall of the threaded rod 14 is provided with an exhaust hole 48.

[0029] The gas is discharged through the exhaust hole 48, which prevents the presence of gas inside the valve body 1 from corroding the inside of the valve body 1 and causing air blockage, thereby affecting the flow of the liquid. Accordingly, by discharging the gas inside the valve body 1, the air blockage phenomenon can be eliminated, ensuring the smooth flow of the liquid in the pipeline and reducing the corrosion of the gas to the inside of the valve body 1; The floating shell 43 slides upward inside the exhaust duct 4, thereby sealing the bottom of the exhaust duct 4, preventing liquid from entering the exhaust duct 4 and causing impurities to remain inside the exhaust duct 4, resulting in blockage of the exhaust duct 4. Accordingly, the patency of the exhaust duct 4 is ensured, allowing the smooth flow of gas, while preventing liquid from being discharged from the exhaust duct 4, thereby increasing the sealing performance of the valve body 1.

[0030] During actual use, when working, first, the valve body 1 is opened to allow the internal liquid to flow, and the operator holds the handle 11 with his hand and rotates it clockwise. Then, through the rotation of the handle 11, the threaded rod 14 can be driven to move accordingly. Then, through the threaded connection between the threaded rod 14 and the valve body 1, the threaded rod 14 can be rotated while moving upward along the direction of the thread. Then, through the upward movement of the threaded rod 14, the mounting seat can drive the piston rod 13 to move upward inside the valve core 12, thereby opening the flow holes on both sides of the valve body 1 to facilitate the passage of liquid.

[0031] When the piston rod 13 continues to move upward through the threaded hole 54 on the piston rod 13 and the threaded rod 2 51, the threaded connection between the threaded rod 2 51 and the threaded hole 54 allows the threaded hole 54 to push the threaded rod 2 51 to rotate when the piston rod 13 drives the threaded rod 1 14 to move upward. Then, through the rotation of the threaded rod 2 51, the winding wheel 5 can reel in the rope 52. Then, by shortening the length of the rope 52, the rope 52 can drive the telescopic plate 22 to move upward, thereby exposing the sealing block 21 inside the protective shell 2. , there is no longer any sealing block 21 intercepted by the telescopic plate 22. By utilizing the telescopic properties of the sealing block 21 itself, when the sealing block 21 is released, the sealing block 21 can be extended from the inside of the protective shell 2 and fit closely with the outer wall of the piston rod 13, thereby increasing the tightness between the piston rod 13 and the inner wall of the valve body 1, avoiding poor sealing effect when the piston rod 13 is in the open state and liquid leakage. Accordingly, through the close fit between the piston rod 13 and the sealing block 21, a good sealing effect can be maintained when the piston rod 13 is in the open state.

[0032] The operator then rotates the handle 11 counterclockwise, so that the threaded rod 14 drives the piston rod 13 to the closed state. When the piston rod 13 moves downward, the threaded hole 54 drives the threaded rod 2 51 to rotate in the opposite direction, so that the winding wheel 5 relaxes the rope 52. When the rope 52 is in the relaxed state, the tension generated by the rope 52 on the telescopic plate 22 can be released. At this time, under the action of gravity, the telescopic plate 22 slides downward, thereby pushing the sealing block 21 into the interior of the protective shell 2 again, and the bottom of the telescopic plate 22 and the interior of the protective shell 2 are connected. When fitting below, the telescopic plate 22 can be stopped from moving downward, thereby protecting the sealing block 21 in a closed space, avoiding the sealing block 21 being still exposed to the inside of the valve body 1 when the piston rod 13 is in the closed state, and increasing the aging of the sealing block 21 under the influence of the internal environment of the valve body 1. Accordingly, through the cooperation of the sealing block 21 and the protective shell 2, the sealing block 21 can be protected when not in use, thereby reducing the contact between the sealing block 21 and the internal environment of the valve body 1, reducing the aging process of the sealing block 21, and thus increasing the service life of the sealing block 21.

[0033] It should be noted that the expansion and contraction property of the sealing block 21 itself is smaller than the force exerted by the expansion and contraction plate 22 in a weightless state.

[0034] The limiting shell 53 connected to the threaded rod 2 51 is rotated to keep the limiting shell 53 stationary when the threaded rod 2 51 rotates, so that the rope 52 can slide inside the cylindrical shell 533 when the winding wheel 5 reels or unwinds the rope 52. Through the cooperation of the limiting shell 53 and the cylindrical shell 533, the part of the rope 52 below the limiting shell 53 is limited during the movement of the rope 52, thereby avoiding the rope 52 shaking during the movement, which causes the rope 52 to be unstable when pulling the telescopic plate 22, and correspondingly increases the stability of the rope 52 during the movement, making the telescopic plate 22 smoother during work.

[0035] The arc ring 534 provided on the top of the cylindrical shell 533 prevents the rope 52 from directly contacting the sharp corners of the cylindrical shell 533 at the bend. Accordingly, the arc ring 534 is made arc-shaped, which can reduce the wear of the rope 52 when the arc ring 534 contacts the rope 52, thereby increasing the service life of the rope 52. The material of the arc ring 534 is soft, which can reduce the heat accumulation and wear of the rope 52 caused by friction during the sliding process.

[0036] By rotating the ball 532 inside the cylindrical shell 533, the rope 52 can slide inside the cylindrical shell 533. Due to the contact between the rope 52 and the ball 532, the friction between the two can be used to drive the ball 532 to rotate. The rotation of the ball 532 can then drive the antiseptic liquid inside the inner cavity 531 to the outer wall of the rope 52, thereby protecting the rope 52 and preventing the rope 52 from being easily damaged in a humid environment. The protection of the rope 52 is correspondingly increased, and the service life of the rope 52 is increased.

[0037] It should be noted that a blocking rod is movably connected to the outer wall of the top of the limiting shell 53.

[0038] When the piston rod 13 moves upward or downward inside the valve core 12, it will drive the L-shaped push rod 31 to slide inside the slide groove 1 34, thereby preventing the piston rod 13 from rotating during the up and down sliding process. Accordingly, through the cooperation between the L-shaped push rod 31 and the slide groove 1 34, the movement mode of the piston rod 13 is limited, thereby increasing the stability of the piston rod 13 in the up and down movement.

[0039] When the piston rod 13 moves to the bottom of the valve core 12, the bottom of the L-shaped push rod 31 can contact the groove at the top of the arc-shaped sealing gasket 3. Since the width of the bottom and top of the side where the L-shaped push rod 31 contacts the arc-shaped sealing gasket 3 is different, the piston rod 13 can be pushed toward the outside of the placement groove 33 when the L-shaped push rod 31 is inserted into the groove on the arc-shaped sealing gasket 3 and moves downward, so that the arc-shaped sealing gasket 3 and the piston rod 13 are tightly fitted, further increasing the sealing between the piston rod 13 and the valve core 12, preventing liquid from flowing out through the tiny gap between the piston rod 13 and the valve core 12 when the piston rod 13 is in the closed state, correspondingly increasing the effect between the valve core 12 and the piston rod 13, so that the piston rod 13 has a better sealing performance when it is in the closed state.

[0040] When the piston rod 13 drives the L-shaped push rod 31 to move upward, the L-shaped push rod 31 can leave the groove on the arc-shaped sealing gasket 3, thereby releasing the push of the L-shaped push rod 31 on the arc-shaped sealing gasket 3. At this time, under the action of the return spring 1 32, the arc-shaped sealing gasket 3 can be driven into the inside of the placement groove 33, reducing the contact between the piston rod 13 and the arc-shaped sealing gasket 3 when moving upward, thereby reducing the wear of the piston rod 13 on the arc-shaped sealing gasket 3 during movement, and keeping the arc-shaped sealing gasket 3 in a better working condition.

[0041] Then, through the exhaust duct 4 arranged inside the piston rod 13, since the position of the piston rod 13 is the highest point of the valve body 1 in the closed state, when there is gas inside the valve body 1, the gas will enter the interior of the movable piston rod 13. When the gas gathers to a certain extent, it will generate thrust on the movable plate 45, thereby causing the movable plate 45 to slide upward inside the second slide groove 44, so that the air inlet groove 2 47 on one side of the movable plate 45 can leak out. Since the air inlet groove 2 47 and the air inlet groove 1 46 are at the same position, the gas can enter the interior of the exhaust duct 4 through the air inlet groove 2 47, and then pass through the interior of the channel 49, and finally be discharged through the exhaust hole 48, thereby avoiding the presence of gas inside the valve body 1 to corrode the interior of the valve body 1 and the occurrence of air resistance, which affects the flow of liquid. Accordingly, by discharging the gas inside the valve body 1, the air resistance phenomenon can be eliminated, ensuring the smooth flow of liquid in the pipeline and reducing the corrosion of the gas to the interior of the valve body 1.

[0042] It should be noted that after the gas is discharged, the moving plate 45 loses its driving force. At this time, under the action of gravity, the moving plate 45 slides downward inside the second chute 44 .

[0043] By setting the floating shell 43, when liquid enters the bottom of the exhaust channel 4, the liquid can push the floating shell 43 to slide upward inside the exhaust channel 4, thereby sealing the bottom of the exhaust channel 4, preventing liquid from entering the exhaust channel 4 and causing impurities to remain inside the exhaust channel 4, resulting in blockage of the exhaust channel 4. Accordingly, the patency of the exhaust channel 4 is ensured, the gas flows smoothly, and at the same time, the liquid is prevented from being discharged from the exhaust channel 4, thereby improving the sealing performance of the valve body 1.

[0044] It should be noted that the elastic force of the second return spring 42 is smaller than the driving force of water on the floating shell 43 .

[0045] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A self-sealing high-temperature and high-pressure stop valve, characterized by: The self-sealing high-temperature and high-pressure stop valve comprises: a valve body (1), a threaded rod (14) is connected to the upper part of the interior of the valve body (1), a handle (11) is fixedly connected to the outer wall of the top of the threaded rod (14), the outer wall of the bottom of the handle (11) is in movably contact with the outer wall of the top of the valve body (1), a valve core (12) is fixedly connected to the interior of the valve body (1), a piston rod (13) is movably inserted into the inner wall of the valve core (12), the outer wall of the top of the piston rod (13) is fixedly connected to a mounting seat, the interior of the mounting seat is rotatably connected to the outer wall of the bottom of the threaded rod (14), and a sealing protection component is provided inside the valve body (1); The sealing protection assembly comprises a protection shell (2), a sealing block (21) and a telescopic plate (22); the outer wall of the protection shell (2) is fixedly connected to the upper part of the inner wall of the valve body (1).

2. A self-sealing high-temperature and high-pressure stop valve according to claim 1, characterized in that: The interior of the top of the protective shell (2) is fixedly connected to the outer wall of the top of the telescopic plate (22), the inner wall of the protective shell (2) is fixedly connected to the outer wall of the sealing block (21), and the inner wall of the sealing block (21) is in movable contact with the outer wall of the telescopic plate (22).

3. The self-sealing high-temperature and high-pressure stop valve according to claim 1, characterized in that: The inner wall of the top of the protective shell (2) is rotatably connected to the winding wheel (5), and the outer wall of the bottom of the two winding wheels (5) is fixedly connected to the second threaded rod (51). The outer wall of the second threaded rod (51) is located below the winding wheel (5) and is rotatably connected to the limiting shell (53). The outer wall of the top of the limiting shell (53) is provided with a circular hole, and the inside of the circular hole is fixedly connected to the cylindrical shell (533). The inside of the cylindrical shell (533) is slidably connected to the rope (52). The outer wall of the bottom of the rope (52) is fixedly connected to the inner wall of the bottom of the telescopic plate (22). The outer wall of the top of the piston rod (13) is provided with a threaded hole (54), and the inside of the threaded hole (54) is threadedly connected to the outer wall of the second threaded rod (51). The outer wall of one end of the rope (52) is connected to the outer wall of the winding wheel (5) by a rope.

4. A self-sealing high-temperature and high-pressure stop valve according to claim 3, characterized in that: An inner cavity (531) is provided inside the limiting shell (53), and an outer wall on one side of the inner cavity (531) is connected to an outer wall on one side of the cylindrical shell (533). A through hole is provided on the inner wall of the cylindrical shell (533), and a ball (532) is rotatably connected inside the through hole. The outer wall of the ball (532) is in movable contact with the outer wall of the rope (52).

5. A self-sealing high-temperature and high-pressure stop valve according to claim 4, characterized in that: The outer wall of the top of the cylindrical shell (533) is fixedly connected to an arc ring (534), and the outer wall of the top of the arc ring (534) is in movable contact with the outer wall of the rope (52).

6. The self-sealing high-temperature and high-pressure stop valve according to claim 1, characterized in that: An L-shaped push rod (31) is fixedly connected to the lower portion of the outer wall of the piston rod (13), and a sliding groove (34) is provided on the inner wall of the valve core (12) at the position of the L-shaped push rod (31). The interior of the sliding groove (34) is slidably connected to the outer wall of the L-shaped push rod (31).

7. The self-sealing high-temperature and high-pressure stop valve according to claim 6, characterized in that: A placement groove (33) is provided below the inner wall of the valve core (12), the inner wall of the placement groove (33) is fixedly connected to a return spring (32), the outer wall of one end of the return spring (32) is fixedly connected to an arc-shaped sealing gasket (3), the outer wall of the arc-shaped sealing gasket (3) is in movable contact with the inner wall of the placement groove (33), the inner wall of the arc-shaped sealing gasket (3) is in movable contact with the outer wall of the piston rod (13), and the inner wall of the L-shaped push rod (31) is in movable contact with the outer wall of the arc-shaped sealing gasket (3).

8. The self-sealing high-temperature and high-pressure stop valve according to claim 1, characterized in that: The interior of the piston rod (13) is fixedly connected to an exhaust duct (4), the inner wall of the exhaust duct (4) is fixedly connected to a mounting plate (41), the outer wall of the bottom of the mounting plate (41) is fixedly connected to a second return spring (42), the outer wall of the bottom of the second return spring (42) is fixedly connected to a floating shell (43), and the outer wall of the floating shell (43) is provided with an air inlet groove (46).

9. The self-sealing high-temperature and high-pressure stop valve according to claim 8, characterized in that: The outer wall of the bottom of the exhaust duct (4) is provided with a second slide groove (44), the inner wall of the second slide groove (44) is slidably connected to a movable plate (45), the outer wall of the exhaust duct (4) is provided with a second air inlet groove (47), the outer wall of the movable plate (45) is slidably connected to the outer wall of the second air inlet groove (47).

10. The self-sealing high-temperature and high-pressure stop valve according to claim 1, characterized in that: A passage (49) is provided inside the threaded rod (14), and an exhaust hole (48) is provided above the outer wall of the threaded rod (14).

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