Low-temperature stop valve capable of being quickly opened and closed

Abstract

A low-temperature stop valve capable of being opened and closed quickly belongs to the technical field of stop valves. The valve comprises a valve body, the interior of the valve body is fixedly connected with a partition plate, the interior of the valve body is provided with a uniform mixing mechanism, the interior of the valve body is rotationally connected with a threaded rod through threads in a penetrating mode, and the uniform mixing mechanism comprises a plurality of first turbine blades so that when the valve is opened, the first turbine blades can rotate around the threaded rod. The first turbine blades are driven by water flow to rotate, the water flow is evenly mixed, and a sealing mechanism is arranged at the bottom of the threaded rod so that the situation of water flow leakage can be prevented when the valve is closed. The first turbine blades rotate to stir fluid, ice crystals in the fluid can be dispersed and refined, flowing resistance is reduced, fluidity is improved, the ice crystals are prevented from being accumulated on the inner wall of a pipeline and dead corners of a valve port, and the blocking risk is reduced. And when the multiple blades are impacted, the circular ring slides along the rotating rod and compresses the second spring, buffering is provided for the blades, and damage caused by impact force borne by the first turbine blades is further relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of stop valves, and in particular to a fast-opening and closing low-temperature stop valve. Background Art

[0002] Cryogenic globe valves, critical fluid control components specifically designed for extreme low-temperature environments, are widely used in numerous fields requiring the highest demands for cryogenic fluid control. These valves maintain exceptional performance and sealing even in ultra-low-temperature conditions, ensuring safe and efficient operation of fluid systems. Using cryogenic fluids as their working medium, they demonstrate reliability and durability in extreme environments.

[0003] Since the low-temperature stop valve needs to work in an extremely low temperature environment, its materials, structure and sealing performance are facing severe challenges. Its working principle is to rely on the pressure of the valve stem to make the valve disc sealing surface fit tightly with the valve seat sealing surface to prevent the flow of medium. It is a forced sealing valve. After long-term use, the valve disc will be eroded by the medium, resulting in a certain amount of wear and tear on the valve disc sealing surface and the valve seat sealing surface. During long-term use, the valve disc and valve seat may be worn and leak. The staff will not be able to know the sealing condition in time, which will cause the valve disc and valve seat to fail to intercept the water flow. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that valve flap leakage cannot be dealt with in a timely manner, and to propose a fast-opening and closing low-temperature stop valve.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a fast-opening and closing low-temperature stop valve, comprising a valve body, a partition plate fixedly connected to the interior of the valve body, a mixing mechanism provided inside the valve body, and a threaded rod rotatably connected to the interior of the valve body via a thread; The mixing mechanism includes a plurality of first turbine blades, so that when the valve is opened, the water flow drives the plurality of first turbine blades to rotate and the water flow is mixed; A sealing mechanism is provided at the bottom of the threaded rod to prevent water leakage when the valve is closed.

[0006] Furthermore, the mixing mechanism includes a rotating rod, and the outer wall of the rotating rod is slidably connected to a circular ring, and the ends of the first turbine blades facing the circular ring are fixedly connected to the outer wall of the circular ring, and the end of the first turbine blade away from the circular ring is rotatably connected to the second turbine blade through a torsion spring hinge, the end of the first turbine blade facing the second turbine blade is fixedly connected to a clamping block, and the inner wall of the clamping block is slidably connected to a rubber block, the side wall of the rubber block is fixedly connected to a first spring, and the end of the first spring away from the rubber block is fixedly connected to the inner wall of the clamping block, and the end of the second turbine blade facing the first turbine blade is fixedly connected to a clamping rod.

[0007] Furthermore, a sliding groove is provided inside the rotating rod, and a sliding block is slidably connected to the inner wall of the sliding groove, a second spring is fixedly connected to the side wall of the sliding block, and an end of the second spring away from the sliding block is fixedly connected to the inner wall of the sliding groove, an extrusion head is slidably connected to one end of the rotating rod, and a third spring is fixedly connected to an end of the extrusion head facing the rotating rod, an end of the third spring away from the extrusion head is fixedly connected to the end of the rotating rod, an outer wall of the rotating rod is rotatably connected to a connecting frame, and both ends of the connecting frame are fixedly connected to the inner wall of the valve body.

[0008] Furthermore, the outer wall of the rotating rod is rotatably connected to the side wall of the partition plate, and the outer wall of the clamping rod corresponds to the side wall of the rubber block.

[0009] Further, the sealing mechanism includes a valve flap, and a leakage groove is opened through the interior of the valve flap, the inner wall of the leakage groove is slidably connected to a blocking ring, and the bottom of the blocking ring is fixedly connected to a fourth spring, the end of the fourth spring away from the blocking ring is fixedly connected to the inner wall of the leakage groove, the top of the fourth spring is fixedly connected to an extrusion rod, and the outer wall of the extrusion rod is slidably connected to the interior of the valve flap, a pressure groove is opened at the bottom of the inner wall of the leakage groove, and the inner wall of the pressure groove is slidably connected to a pressure plate, the bottom of the pressure plate is slidably connected to a fifth spring, and the end of the fifth spring away from the pressure plate is fixedly connected to the inner wall of the pressure groove.

[0010] Furthermore, the interior of the valve disc is slidably connected to a plurality of sliding plates, and the side walls of several of the sliding plates are fixedly connected to a tension spring, and the end of the tension spring away from the sliding plate is fixedly connected to the interior of the valve disc, the end of the sliding plate is slidably connected to a limit block, and the bottom of the limit block is fixedly connected to a sixth spring, and the end of the sixth spring away from the limit block is fixedly connected to the interior of the sliding plate, and the ends of several sliding plates away from each other are fixedly connected to a sealing strip, and the outer wall of the sealing strip is slidably connected to the interior of the valve disc, and a pressure sensor is fixedly installed on the bottom of the inner wall of the pressure groove.

[0011] Furthermore, the top of the valve flap is fixedly connected to the bottom of the threaded rod, and the end of the third spring corresponds to the end of the extrusion rod.

[0012] Furthermore, a sliding rod is fixedly connected to the top of the valve body, and a planetary gear transmission assembly is slidably installed on the outer wall of the sliding rod. The output shaft of the planetary gear transmission assembly is fixedly connected to the top of the threaded rod, and the input shaft of the planetary gear transmission assembly is fixedly connected to a knob.

[0013] Furthermore, an alarm is fixedly installed on the outer wall of the valve body, and the alarm is electrically connected to the sealing strip. One end of the valve body is fixedly connected to a water inlet interface, and the end of the valve body away from the water inlet interface is fixedly connected to a water outlet interface.

[0014] Compared with the prior art, the above solution has the following beneficial effects: 1. When fluid is being transported, the fluid will drive the first turbine blade to rotate continuously. The rotation of the first turbine blade can continuously stir the fluid. During long-term use, the fluid may encounter ice crystals when the temperature is too low. The rotation of the first turbine blade stirs the fluid, which can disperse and refine the ice crystals inside the fluid, reduce flow resistance, and improve fluidity, thereby avoiding the accumulation of fluid with ice crystals in the dead corners of the inner wall of the pipeline and the valve port, thereby reducing the risk of blockage. When multiple first turbine blades are subjected to the impact force of the fluid, the ring will slide along the outer wall of the rotating rod, and the second spring will be compressed. The compression of the second spring can provide a buffer for the first turbine blades, further alleviating the damage caused by the impact force on the first turbine blades.

[0015] 2. When the stop valve is in the closed state, if the valve disc leaks, the fluid will flow into the leakage groove, and the pressure exerted on the pressure plate will increase, causing the limit block to slide into the inside of the sliding plate. At this time, the sliding plate will be displaced by the tension of the tension spring. At the same time, the sliding plate will drive the sealing strip to be squeezed outward, and multiple sealing strips will spread outward and squeeze and fit in the gap between the valve disc and the partition plate to block the leaked fluid, forming a secondary seal, effectively blocking the leakage path. At the same time, the pressure plate will contact and squeeze the bottom pressure sensor after sliding, and then the pressure sensor will alarm through the alarm after being squeezed, so as to promptly notify the staff to carry out maintenance through the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention; Figure 2 This is a schematic diagram of the internal structure of the valve body proposed by the present invention; Figure 3 This is a cross-sectional view of the structure of the mixing mechanism proposed by the present invention; Figure 4 This is a schematic diagram of the structural connection between the first turbine blade and the second turbine blade proposed in the present invention; Figure 5 This is a schematic diagram of the internal structure of the rotating rod proposed in the present invention; Figure 6 A schematic diagram of the internal structure of the valve disc proposed in the present invention; Figure 7 A schematic diagram of the internal structure of the valve disc proposed in the present invention; Figure 8 This is a detailed internal view of the planetary gear transmission assembly proposed by the present invention.

[0017] The symbols in the accompanying drawings are: 1, valve body; 2, partition plate; 3, mixing mechanism; 4, threaded rod; 5, sealing mechanism; 6, sliding rod; 7, planetary gear speed change assembly; 8, knob; 9, alarm; 10, water inlet interface; 11, water outlet interface; 301, rotating rod; 302, ring; 303, first turbine blade; 304, second turbine blade; 305, clamping block; 306, rubber block; 307, first spring; 308, clamping rod; 309, slide groove; 310. Sliding block; 311. Second spring; 312. Extrusion head; 313. Third spring; 314. Connecting frame; 501. Valve flap; 502. Leakage groove; 503. Blocking ring; 504. Fourth spring; 505. Extrusion rod; 506. Pressure groove; 507. Pressure plate; 508. Fifth spring; 509. Sliding plate; 510. Tension spring; 511. Limit block; 512. Sixth spring; 513. Sealing strip; 514. Pressure sensor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," and "bottom" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate description and simplify the present invention. They are not intended to indicate or imply that the positions or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used solely to distinguish an entity or operation from another entity or operation and do not require or imply any actual relationship, order, or relative importance between these entities or operations.

[0020] For example 1, please refer to Figure 1-Figure 2A fast-opening and closing low-temperature stop valve comprises a valve body 1, a partition plate 2 is fixedly connected to the interior of the valve body 1, and a mixing mechanism 3 is provided inside the valve body 1, a threaded rod 4 is rotatably connected to the interior of the valve body 1 through a thread, a sliding rod 6 is fixedly connected to the top of the valve body 1, and a planetary gear speed change assembly 7 is slidably installed on the outer wall of the sliding rod 6, the output shaft of the planetary gear speed change assembly 7 is fixedly connected to the top of the threaded rod 4, the input shaft of the planetary gear speed change assembly 7 is fixedly connected to a knob 8, an alarm 9 is fixedly installed on the outer wall of the valve body 1, one end of the valve body 1 is fixedly connected to a water inlet interface 10, and the end of the valve body 1 away from the water inlet interface 10 is fixedly connected to a water outlet interface 11; Furthermore, the mixing mechanism 3 includes a plurality of first turbine blades 303. When the valve is opened, the water flow drives the plurality of first turbine blades 303 to rotate and mix the water flow. A sealing mechanism 5 is provided at the bottom of the threaded rod 4 to prevent water leakage when the valve is closed. More specifically, the installation work is first completed by connecting the water inlet interface 10 and the water outlet interface 11 to the corresponding pipes respectively. When the fluid needs to be transported, the knob 8 is manually turned, and then the knob 8 will drive the input shaft of the planetary gear transmission assembly 7 to rotate. Then the planetary gear transmission assembly 7 drives the threaded rod 4 of its output shaft to rotate through transmission. Then the rotation of the threaded rod 4 rotates along the thread inside the valve body 1, so that it will gradually move upward. At the same time, the planetary gear transmission assembly 7 will slide synchronously along the outer wall of the sliding rod 6. In the process of the threaded rod 4 moving upward, it will also drive the sealing mechanism 5 to move synchronously. Then the sealing mechanism 5 will break away from contact with the partition plate 2. At this time, the fluid can be transported through the interior of the partition plate 2. The speed is changed by the transmission ratio of the planetary gear transmission assembly 7, so that the speed of the threaded rod 4 is greater than the rotation of the knob 8. When the operator turns the knob 8 one circle, the threaded rod 4 has rotated two circles, so that the operator can quickly control the start and close states.

[0021] For example 2, please refer to Figure 3-Figure 5 On the basis of the first embodiment, in this embodiment, the mixing mechanism 3 includes a rotating rod 301, and the outer wall of the rotating rod 301 is slidably connected to a ring 302, and the ends of the first turbine blades 303 facing the ring 302 are fixedly connected to the outer wall of the ring 302, and the ends of the first turbine blades 303 away from the ring 302 are rotatably connected to the second turbine blades 304 through a torsion spring hinge, and the ends of the first turbine blades 303 facing the second turbine blades 304 are fixedly connected to a clamping block 305, and the inner wall of the clamping block 305 is slidably connected to a rubber block 306, and the side wall of the rubber block 306 is fixedly connected to a first spring 307, and the end of the first spring 307 away from the rubber block 306 is fixedly connected to the inner wall of the clamping block 305, and the end of the second turbine blades 304 facing the first turbine blades 303 is fixedly connected to a clamping rod 308; When the cam 314 is in the closed position, the spring 313 is in the closed position, and the spring 313 is in the closed position, so that the cam 314 can be turned off. When the cam 314 is in the closed position, the spring 313 is turned off, and the cam 314 is turned off, so that the cam 314 can be turned off. When the cam 314 is in the closed position, the spring 313 is turned off, and the cam 314 is turned off, so that the cam 314 can be turned off. More specifically, when fluid is being transported, the fluid flows from the water inlet port 10 toward the interior of the valve body 1. After entering the interior of the valve body 1, the fluid contacts the first turbine blades 303. The first turbine blades 303 are then driven to rotate along with the ring 302 by the fluid. The first turbine blades 303 then drive the rotating rod 301 to rotate synchronously. Meanwhile, the second turbine blades 304 rotate synchronously with the first turbine blades 303. Subsequently, during the fluid flow process, the first turbine blades 303 continue to rotate, and the fluid is continuously stirred by the rotation of the first turbine blades 303. During long-term use, ice crystals may appear in the fluid when the temperature is too low. The rotation of the first turbine blade 303 stirs the fluid, which can disperse and refine the ice crystals inside the fluid, reduce flow resistance, and improve fluid fluidity, thereby preventing the fluid with ice crystals from accumulating in the dead corners of the inner wall of the pipe and the valve port, thereby reducing the risk of blockage. When the first turbine blade 303 first contacts the fluid, the impact force of the fluid being output is too great compared to the impact force in the stable state. At this time, when the first turbine blade 303 and the second turbine blade 304 are not rotating and are impacted by the fluid, the impact force of the fluid on the edge of the pipe close to the inner wall is greater. When the second turbine blade 304 is subjected to the excessive impact force, it rotates at an angle relative to the first turbine blade 303 via the torsion spring hinge. At the same time, the second turbine blade 304 drives the connecting rod 308 to separate from the inner wall of the clamping block 305, thereby preventing the second turbine blade 304 from being impacted by the fluid. During this process, the rubber block 306 is squeezed and deformed. After that, the impact force generated during the fluid transportation process will gradually stabilize. At this time, the torsion spring hinge connected to the second turbine blade 304 can withstand the fluid impact force, and then drive the second turbine blade 304 to reset and rotate in the opposite direction. When it rotates to the specified moving position, the second turbine blade 304 will drive the clamping rod 308 to squeeze the inclined surface of the rubber block 306. Then the rubber block 306 will compress the first spring 307. Then the rubber block 306 will slide into the inside of the clamping block 305. Then the clamping rod 308 will pass over the rubber block 306 to complete the reset. The rubber block 306 squeezes the first spring 307, so that the force required to reset the clamping rod 308 is less than the force at the beginning of the rotation, making the reset of the clamping rod 308 faster and less likely to get stuck. When the multiple first turbine blades 303 are subjected to the impact force of the fluid, the ring 302 will slide along the outer wall of the rotating rod 301, and in the process, it will drive the sliding block 310 to slide along the inner wall of the sliding groove 309. At the same time, the second spring 311 will be compressed. The compression of the second spring 311 can provide a buffer for the first turbine blades 303, further alleviating the damage caused by the impact force on the first turbine blades 303.

[0022] For example three, please refer to Figure 6-Figure 7 On the basis of the second embodiment, in this embodiment, the sealing mechanism 5 includes a valve disc 501, and a leakage groove 502 is formed inside the valve disc 501, and a blocking ring 503 is slidably connected to the inner wall of the leakage groove 502, and a fourth spring 504 is fixedly connected to the bottom of the blocking ring 503, and one end of the fourth spring 504 away from the blocking ring 503 is fixedly connected to the inner wall of the leakage groove 502, and an extrusion rod 505 is fixedly connected to the top of the fourth spring 504, and the outer wall of the extrusion rod 505 is slidably connected to the inside of the valve disc 501, a pressure groove 506 is formed at the bottom of the inner wall of the leakage groove 502, and a pressure plate 507 is slidably connected to the inner wall of the pressure groove 506, and a fifth spring 508 is slidably connected to the bottom of the pressure plate 507, and one end of the fifth spring 508 away from the pressure plate 507 is fixedly connected to the inner wall of the pressure groove 506; Furthermore, the interior of the valve disc 501 is slidably connected with a plurality of sliding plates 509, and the side walls of the plurality of sliding plates 509 are fixedly connected with a tension spring 510, and the end of the tension spring 510 away from the sliding plate 509 is fixedly connected to the interior of the valve disc 501, and the end of the sliding plate 509 is slidably connected to the limit block 511, and the bottom of the limit block 511 is fixedly connected with a sixth spring 512, and the end of the sixth spring 512 away from the limit block 511 is fixedly connected to the interior of the sliding plate 509, and the ends of the plurality of sliding plates 509 away from each other are fixedly connected with a sealing strip 513, and the outer wall of the sealing strip 513 passes through and is slidably connected to the interior of the valve disc 501, a pressure sensor 514 is fixedly installed at the bottom of the inner wall of the pressure groove 506, the top of the valve disc 501 is fixedly connected to the bottom of the threaded rod 4, the end of the third spring 313 corresponds to the end of the extrusion rod 505, and the alarm 9 is electrically connected to the sealing strip 513; When the valve disc 501 is in the closed position, the outer wall of the valve disc 501 is pressed against the extrusion head 312, and the extrusion head 312 compresses the third spring 313. When the valve disc 501 is in the closed position, the extrusion head 312 is pressed against the extrusion rod 505, and the extrusion rod 505 drives the blocking ring 503 to slide downward. At the same time, the fourth spring 504 is compressed. At this time, the blocking ring 503 no longer separates the leakage groove 502. If the valve disc 501 leaks, the fluid flows through the gap between the valve disc 501 and the partition plate 2, flows into the leakage groove 502, and then flows to the top of the pressure plate 507. During the continuous leakage process, the pressure exerted by the fluid on the pressure plate 507 will increase, causing it to slide downward along the inner wall of the pressure groove 506, and then the fifth spring 508 will be compressed. After that, when the pressure plate 507 slides to the specified position, it will contact the limit block 511 and then squeeze it, causing the limit block 511 to slide into the inside of the sliding plate 509. During the process, the sixth spring 512 will be squeezed. At this time, the sliding plate 509 will be pulled by the tension spring 510 and displaced. At the same time, the sliding plate 509 will drive the sealing strip 513 to be squeezed outward. Through multiple sealing strips 513 spreading outward and squeezing and fitting in the gap between the valve disc 501 and the partition plate 2, the leaked fluid is blocked, forming a secondary seal, and effectively blocking the leakage path. At the same time, the pressure plate 507 will contact and squeeze the bottom pressure sensor 514 after sliding. Then, the pressure sensor 514 will sound an alarm through the alarm 9 after being squeezed, thereby notifying the staff to perform maintenance in time through the alarm.

[0023] The working principle of the present invention is as follows: the first turbine blade 303 is driven to rotate along with the ring 302 by the fluid, and then the first turbine blade 303 drives the rotating rod 301 to rotate synchronously, and at the same time, the second turbine blade 304 rotates synchronously with the first turbine blade 303. Thereafter, during the flow of the fluid, the first turbine blade 303 can continue to rotate, and the rotation of the first turbine blade 303 can continuously stir the fluid. Since the fluid may be subjected to ice crystals when the temperature is too low during long-term use, the rotation of the first turbine blade 303 stirs the fluid. When the delivery is completed, the valve disc 501 is engaged with the partition plate 2 by rotating the knob 8, thereby completing the closed state of the stop valve. During the downward displacement of the valve disc 501, the outer wall of the valve disc 501 is squeezed against the extrusion head 312, so that the extrusion head 312 compresses the third spring 313. Then, when the valve disc 501 is completely displaced, the extrusion head 312 is reset by the elastic force of the third spring 313, and then the extrusion head 312 squeezes the end of the extrusion rod 505, and then the extrusion rod 505 drives the blocking ring 503 to slide downward, and at the same time the fourth spring 504 is compressed. At this time, the blocking ring 503 no longer separates the leakage groove 502. If the valve disc 501 leaks, the fluid flows through the gap between the valve disc 501 and the partition plate 2, flows into the inside of the leakage groove 502, and then flows to the top of the pressure plate 507. During the continuous leakage process, the pressure exerted by the fluid on the pressure plate 507 will become greater, causing it to slide downward along the inner wall of the pressure groove 506, and then the fifth spring 508 will be compressed. After that, the pressure plate 507 will contact the limit block 511 when sliding to the specified position, and then it will be squeezed to make the limit block 511 slide to the inside of the sliding plate 509. During this process, the sixth spring 512 will be squeezed. At this time, the sliding plate 509 will be subjected to the tension of the tension spring 510 and thus displaced. At the same time, the sliding plate 509 will drive the sealing strip 513 to be squeezed outward, and through multiple sealing strips 513, they spread outward and squeezed to fit the gap between the valve disc 501 and the partition plate 2 to block the leaked fluid.

[0024] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0025] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A fast-opening and closing cryogenic stop valve, comprising a valve body (1), characterized in that: The interior of the valve body (1) is fixedly connected to a partition plate (2), and a mixing mechanism (3) is provided inside the valve body (1). The interior of the valve body (1) is rotatably connected to a threaded rod (4) penetrating through the thread. The mixing mechanism (3) includes a plurality of first turbine blades (303), so that when the valve is opened, the water flow drives the first turbine blades (303) to rotate, thereby mixing the water flow; A sealing mechanism (5) is provided at the bottom of the threaded rod (4) to prevent water leakage when the valve is closed.

2. A rapid opening and closing cryogenic stop valve according to claim 1, characterized in that: The mixing mechanism (3) comprises a rotating rod (301), and the outer wall of the rotating rod (301) is slidably connected to a circular ring (302), one end of a plurality of first turbine blades (303) facing the circular ring (302) is fixedly connected to the outer wall of the circular ring (302), one end of the first turbine blade (303) away from the circular ring (302) is rotatably connected to a second turbine blade (304) via a torsion spring hinge, one end of the first turbine blade (303) facing the second turbine blade (304) is fixedly connected to a clamping block (305), and a rubber block (306) is slidably connected to the inner wall of the clamping block (305), a side wall of the rubber block (306) is fixedly connected to a first spring (307), and one end of the first spring (307) away from the rubber block (306) is fixedly connected to the inner wall of the clamping block (305), and one end of the second turbine blade (304) facing the first turbine blade (303) is fixedly connected to a clamping rod (308).

3. A rapid opening and closing cryogenic stop valve according to claim 2, characterized in that: A sliding groove (309) is provided inside the rotating rod (301), and the inner wall of the sliding groove (309) is slidably connected to a sliding block (310), the side wall of the sliding block (310) is fixedly connected to a second spring (311), and the end of the second spring (311) away from the sliding block (310) is fixedly connected to the inner wall of the sliding groove (309), one end of the rotating rod (301) is slidably connected to an extrusion head (312), and the end of the extrusion head (312) facing the rotating rod (301) is fixedly connected to a third spring (313), and the end of the third spring (313) away from the extrusion head (312) is fixedly connected to the end of the rotating rod (301), the outer wall of the rotating rod (301) is rotatably connected to a connecting frame (314), and both ends of the connecting frame (314) are fixedly connected to the inner wall of the valve body (1).

4. A rapid opening and closing cryogenic stop valve according to claim 2, characterized in that: The outer wall of the rotating rod (301) is rotatably connected to the side wall of the partition plate (2), and the outer wall of the clamping rod (308) corresponds to the side wall of the rubber block (306).

5. A rapid opening and closing cryogenic stop valve according to claim 3, characterized in that: The sealing mechanism (5) comprises a valve flap (501), and a leakage groove (502) is provided inside the valve flap (501), the inner wall of the leakage groove (502) is slidably connected to a blocking ring (503), and the bottom of the blocking ring (503) is fixedly connected to a fourth spring (504), one end of the fourth spring (504) away from the blocking ring (503) is fixedly connected to the inner wall of the leakage groove (502), the top of the fourth spring (504) is fixedly connected to an extrusion rod (505), and the outer wall of the extrusion rod (505) is slidably connected to the inside of the valve flap (501), a pressure groove (506) is provided at the bottom of the inner wall of the leakage groove (502), and the inner wall of the pressure groove (506) is slidably connected to a pressure plate (507), the bottom of the pressure plate (507) is slidably connected to a fifth spring (508), and one end of the fifth spring (508) away from the pressure plate (507) is fixedly connected to the inner wall of the pressure groove (506).

6. A rapid opening and closing cryogenic stop valve according to claim 5, characterized in that: The valve flap (501) is slidably connected to a plurality of sliding plates (509), and the side walls of the plurality of sliding plates (509) are fixedly connected to a tension spring (510), and the end of the tension spring (510) away from the sliding plate (509) is fixedly connected to the inside of the valve flap (501), the end of the sliding plate (509) is slidably connected to a limit block (511), and the bottom of the limit block (511) is fixedly connected to a sixth spring (512), and the end of the sixth spring (512) away from the limit block (511) is fixedly connected to the inside of the sliding plate (509), and the ends of the plurality of sliding plates (509) away from each other are fixedly connected to a sealing strip (513), and the outer wall of the sealing strip (513) is slidably connected to the inside of the valve flap (501), and a pressure sensor (514) is fixedly installed at the bottom of the inner wall of the pressure groove (506).

7. A rapid opening and closing cryogenic stop valve according to claim 5, characterized in that: The top of the valve flap (501) is fixedly connected to the bottom of the threaded rod (4), and the end of the third spring (313) corresponds to the end of the extrusion rod (505).

8. The rapid opening and closing cryogenic stop valve according to claim 1, characterized in that: The top of the valve body (1) is fixedly connected to a slide rod (6), and a planetary gear speed change assembly (7) is slidably mounted on the outer wall of the slide rod (6). The output shaft of the planetary gear speed change assembly (7) is fixedly connected to the top of the threaded rod (4), and the input shaft of the planetary gear speed change assembly (7) is fixedly connected to a knob (8).

9. A rapid opening and closing cryogenic stop valve according to claim 6, characterized in that: An alarm (9) is fixedly mounted on the outer wall of the valve body (1), and the alarm (9) is electrically connected to the sealing strip (513). One end of the valve body (1) is fixedly connected to a water inlet interface (10), and an end of the valve body (1) away from the water inlet interface (10) is fixedly connected to a water outlet interface (11).

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