Anti-blocking low-temperature pressure increasing valve

Abstract

The anti-blocking low-temperature pressure increasing valve comprises a valve element assembly, a valve body, a spring assembly and a pressure adjusting assembly which are sequentially arranged from top to bottom, an inflow port and an outflow port are formed in the valve body, a self-adjusting assembly is further arranged in a valve cover and comprises a water absorption gasket, and the water absorption gasket can expand after absorbing water; a plurality of round through holes are formed in the water absorption gasket to form a penetrating hole, a connecting piece is arranged in the penetrating hole and comprises a connecting column and a baffle, the connecting column and the baffle are integrally arranged, and the connecting column penetrates through the penetrating hole. According to the invention, the voltage regulation accuracy in a low-temperature environment can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of pressure control valves, and in particular to an anti-blocking low-temperature booster valve. Background Art

[0002] Cryogenic valves are special valves, mainly used to output flammable and explosive liquid cryogenic media such as ethylene, liquid oxygen, liquid hydrogen, liquefied natural gas, liquefied petroleum products, etc. Since the working environment of cryogenic valves is in a low temperature environment, during the working process, water droplets or frost will appear inside the valve cover due to the low temperature. Once water droplets or frost appear, the breathing holes on the valve cover will be blocked, thereby increasing the pressure inside the valve cover, causing the internal pressure to fluctuate, affecting the accuracy of the pressure regulation. Utility Model Content

[0003] In order to ensure the pressure regulation accuracy of the cryogenic valve in a low temperature environment, the present application provides an anti-blocking low temperature booster valve.

[0004] The present application provides an anti-blocking low-temperature booster valve, which adopts the following technical solution:

[0005] A low-temperature booster valve to prevent blockage, comprising a valve core assembly, a valve body, a spring assembly and a pressure regulating assembly which are arranged in sequence from top to bottom, the valve body being provided with an inlet and an outlet, the top of the valve body being further provided with a threaded opening, the spring assembly comprising a valve cover, the valve cover being threadedly connected to the threaded opening, a diaphragm gasket, a metal diaphragm and a diaphragm stopper being arranged in sequence at the junction of the valve cover and the above, one end of the diaphragm stopper abutting against the end of the valve cover close to the valve body, the other end of the diaphragm stopper being bent and extended toward the middle position of the valve cover to form a bent portion, the metal diaphragm being pressed on the top of the diaphragm stopper, the top of the diaphragm gasket abutting against the inner wall of the valve body, the spring assembly further comprising a valve seat bolt, the valve seat The bolts are penetrated in the metal diaphragm, and a pressure plate is also penetrated on the valve seat bolts. A self-adjusting component is also arranged in the valve cover, and the self-adjusting component includes a water-absorbing gasket, and the water-absorbing gasket is arranged at the end of the bending portion away from the pressure plate. A plurality of circular through holes are opened on the water-absorbing gasket to form a through hole, and a connecting piece is arranged in the through hole, and the connecting piece includes a connecting column and a baffle. The connecting column and the baffle are integrally arranged, and the connecting column is penetrated in the through hole. The end of the connecting column away from the baffle is welded and fixed to the pressure plate, and a circular through hole is opened on the valve cover to form a breathing hole. The side of the valve cover is also inclined with a through hole to form a vent, and the opening height of the vent on the outer wall of the valve cover is higher than the opening height of the inner wall of the valve cover.

[0006] By adopting the above technical solution and arranging the water-absorbing gasket and the connecting piece, the water-absorbing gasket can generate a pulling force on the pressure plate through the connecting piece when it expands due to absorbing water, thereby offsetting the increased pressure on the side of the metal diaphragm close to the valve cover caused by the increased pressure inside the valve cover, thereby achieving the technical effect of automatic pressure regulation.

[0007] In a specific feasible implementation scheme, the penetration point of the valve seat bolt and the metal diaphragm is sealed, and a nut is threadedly connected to the valve seat bolt. The nut and the valve seat bolt are threadedly fixed to press the pressure plate and the metal diaphragm. The spring assembly also includes a main spring, which is arranged in the valve cover, and one end of the main spring abuts against the pressure plate.

[0008] By adopting the above technical solution and setting the valve seat bolts and nuts, the pressure plate and the metal diaphragm can be pressed and fixed, so that the pressure plate can move with the movement of the metal diaphragm. The main spring abuts against the pressure plate, and the pressure on the pressure plate and the metal diaphragm can be adjusted by the pressure of the main spring.

[0009] In a specific feasible implementation scheme, the pressure regulating assembly includes an adjusting bolt, a sleeve cover, a conduit and a locking screw sleeve, the inner wall of the locking screw sleeve is provided with a thread, the valve cover is provided with a flange at one end close to the locking screw sleeve, the outer wall of the flange is provided with a thread, the valve cover is threadedly connected to the locking screw sleeve, the conduit is fixedly arranged on the top of the locking screw sleeve, and the sleeve cover is slidably engaged with the conduit.

[0010] By adopting the above technical solution and setting the pressure regulating assembly, the pressure of the main spring can be adjusted, thereby adjusting the pressure of the metal diaphragm.

[0011] In a specific feasible implementation scheme, the adjusting bolt passes through the conduit and the locking nut in sequence from the end of the sleeve cover away from the valve cover, the end of the adjusting bolt extends into the valve cover, and a spring button is fixedly provided on the end of the adjusting bolt extending into the valve cover, and the self-adjusting component also includes absorbent cotton, which is fixedly provided on an end of the spring button close to the main spring, and an end of the spring button away from the adjusting bolt abuts against the main spring.

[0012] By adopting the above technical solution and arranging the absorbent cotton, the absorbent cotton can absorb the moisture in the air inside the valve cover. When the inside of the valve cover is pre-cooled, the generation of water droplets is reduced, which can reduce the probability of the breathing port being blocked.

[0013] In a specific implementation scheme, a compression spring is sleeved on the adjusting bolt, one end of the compression spring abuts against the inner wall of the sleeve cover, and the other end abuts against the top of the locking nut sleeve, and the adjusting bolt is threadedly connected to the valve cover.

[0014] By adopting the above technical solution, the compression spring can automatically return the adjusting bolt to the correct position.

[0015] In a specific feasible implementation scheme, a valve core opening is further provided at the bottom of the valve body, the valve core assembly is arranged in the valve core opening, the valve core assembly includes a locking stud, the locking stud is threadedly connected to the valve core opening, a secondary spring is movably provided on the locking stud, a guide column is fixedly provided on the top of the locking stud, the side surface of the guide column is slidably arranged with the side wall of the valve core opening, and the bottom of the guide column abuts against the secondary spring.

[0016] By adopting the above technical solution, the auxiliary spring can provide elastic movement for the guide column in the vertical direction.

[0017] In a specific feasible implementation scheme, a cavity is further opened in the valve body to form a pressure chamber, a valve stem is fixedly arranged on the top of the guide column, an end of the valve stem away from the guide column extends into the pressure chamber, and the top of the valve stem abuts against an end of the valve seat bolt away from the valve cover.

[0018] By adopting the above technical solution and arranging the valve stem, the valve stem abuts against the valve seat bolt, so that the elastic change generated by the metal diaphragm pushes the valve stem.

[0019] In a specific implementation scheme, a sealing ring is fixedly provided at one end of the valve stem close to the guide column, and the sealing ring is embedded in the valve stem and fixed. The inner wall of the valve body is also provided with two protrusions to form a limit block, and the sealing ring abuts against the limit block.

[0020] By adopting the above technical solution, when the sealing ring abuts against the limit block, the valve is not conductive and the sealing ring can play a sealing role.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By setting the water-absorbing gasket, the water-absorbing gasket can expand after absorbing water, and use its own expansion force to apply a force in the opposite direction to the pressure plate, and apply an opposite force to the main spring, thereby offsetting the additional pressure applied to the metal diaphragm due to the pressure increase in the valve cover.

[0023] 2. By setting the absorbent cotton, the absorbent cotton can maintain a dry environment inside the valve cover, and by opening holes on the valve cover, the absorbent cotton can be ventilated and dried. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of an embodiment of the present application;

[0025] Figure 2is a cross-sectional view of an embodiment of the present application;

[0026] Figure 3 and Figure 4 This is a schematic diagram of the installation position of the water-absorbing gasket.

[0027] Explanation of the reference numerals: 11. adjusting bolt; 12. sleeve cover; 13. conduit; 14. locking screw sleeve; 15. threaded connection; 16. compression spring; 20. metal diaphragm; 21. valve cover; 211. breathing hole; 212. vent; 22. spring button; 23. main spring; 25. pressure plate; 27. diaphragm limiter; 271. bending portion; 28. diaphragm gasket; 291. valve seat bolt; 31. water-absorbing gasket; 311. perforation; 312. connector; 313. baffle; 314. connecting column; 32. water-absorbing cotton; 4. valve body; 41. inlet; 42. outlet; 43. valve core port; 44. pressure chamber; 45. limit block; 46. threaded opening; 53. valve stem; 531. sealing ring; 54. guide column; 55. auxiliary spring; 56. locking stud. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] The present application embodiment discloses a low temperature boost valve to prevent blocking, referring to Figure 1 and Figure 2, including a valve core assembly, a valve body 4, a spring assembly and a pressure regulating assembly arranged in sequence from top to bottom, an inlet 41 and an outlet 42 are provided in the valve body 4, a cavity is provided inside the valve body 4 to form a pressure chamber 44, and a valve core port 43 is also provided at the bottom of the valve body 4. The valve core assembly is arranged in the valve core port 43, and the valve core assembly includes a locking stud 56, which is threadedly connected to the valve core port 43, and a secondary spring 55 is movably provided on the locking stud 56, and a guide column 54 is fixedly provided on the top of the locking stud 56, the bottom of the guide column 54 is in contact with the secondary spring 55, and both sides of the guide column 54 are slidably arranged with the side walls of the valve core port 43. A valve stem 53 is fixedly provided on the top of the guide column 54. The end of the valve stem 53 away from the guide column 54 extends into the pressure chamber 44. A sealing ring 531 is fixedly provided on the end of the valve stem 53 close to the guide column 54. The sealing ring 531 is embedded in the valve stem 53 and fixed. Two protrusions are also provided on the inner wall of the valve body 4 to form a limit block 45. Under the elastic force of the auxiliary spring 55, the valve stem 53 can make the sealing ring 531 abut against the limit block 45.

[0031] Reference Figure 2 and Figure 4 , a threaded opening 46 is provided at the top of the valve body 4, that is, a thread is provided on the inner wall of the opening. The spring assembly includes a valve cover 21, and a thread is provided on the outer wall of the valve cover 21. The outer wall of the valve cover 21 is screwed and fixed to the threaded opening 46 by screwing, so that the valve cover 21 is fixedly connected to the valve body 4. A diaphragm gasket 28, a metal diaphragm 20 and a diaphragm stopper 27 are provided in sequence from top to bottom at the junction of the valve body 4 and the valve cover 21. The diaphragm gasket 28, the metal diaphragm 20 and the diaphragm stopper 27 are substantially arranged in a circular ring shape, one end of the diaphragm stopper 27 abuts against the end of the valve cover 21 close to the valve body 4, and the other end is bent and extended to the middle position of the valve cover 21 to form a bent portion 271, the metal diaphragm 20 is pressed on the top of the diaphragm stopper 27, the diaphragm gasket 28 is pressed on the top of the metal diaphragm 20, and the top of the diaphragm gasket 28 abuts against the inner wall of the valve body 4. The valve cover 21 is fixedly connected to the valve body 4 by threads, and the diaphragm stopper 27, the diaphragm gasket 28 and the metal diaphragm 20 are pressed and fixed, and the diaphragm gasket 28 plays a sealing role. The spring assembly also includes a valve seat bolt 291, which is inserted into the metal diaphragm 20, and a sealing treatment is performed at the insertion point of the valve seat bolt 291 and the metal diaphragm 20, and the end of the valve seat bolt 291 away from the valve cover 21 abuts against the valve stem 53. A pressure plate 25 is also inserted into the valve seat bolt 291, and a nut is also threadedly connected to the valve seat bolt 291. By tightening the nut, the pressure plate 25 and the metal diaphragm 20 can be pressed and fixed. The spring assembly also includes a main spring 23, which is arranged in the valve cover 21, and one end of the main spring 23 abuts against the pressure plate 25.

[0032] Reference Figure 2The pressure regulating assembly includes an adjusting bolt 11, a cover 12, a conduit 13 and a locking screw sleeve 14, wherein the inner wall of the locking screw sleeve 14 is provided with a thread, and the end of the valve cover 21 close to the locking screw sleeve 14 is provided with a flange, and the outer wall of the flange is provided with a thread, so that the locking screw sleeve 14 is threadedly connected with the valve cover 21. The conduit 13 is fixedly arranged on the top of the locking screw sleeve 14, and the conduit 13 extends a distance to the end away from the valve cover 21, and a scale is provided on the conduit 13. The cover 12 and the conduit 13 are slidably engaged, so that the cover 12 can slide toward the direction of the conduit 13, and the adjusting bolt 11 passes through the conduit 13 and the locking screw sleeve 14 in sequence from the end of the cover 12 away from the valve cover 21, and the end of the adjusting bolt 11 extends into the valve cover 21. A spring button 22 is fixedly provided at the end of the adjusting bolt 11 extending into the valve cover 21. The end of the spring button 22 away from the adjusting bolt 11 abuts against the main spring 23. A compression spring 16 is sleeved on the adjusting bolt 11. One end of the compression spring 16 abuts against the inner wall of the sleeve cover 12, and the other end abuts against the top of the locking nut sleeve 14. The adjusting bolt 11 is threadedly connected to the valve cover 21, and the pressure of the spring can be adjusted by rotating the adjusting bolt 11.

[0033] Reference Figure 2 and Figure 3 A self-adjusting component is also provided in the valve cover 21, and the self-adjusting component includes a water-absorbing gasket 31. The water-absorbing gasket 31 is arranged at the end of the bending portion 271 away from the pressure plate 25. The water-absorbing gasket 31 is substantially set to a circular ring shape. The side wall of the water-absorbing gasket 31 is tightly attached to the bending portion 271. A plurality of circular through holes are opened on the water-absorbing gasket 31 to form a through hole 311. A through hole is opened at a position of the bending portion 271 corresponding to the through hole 311. A connecting piece 312 is arranged in the through hole 311. The connecting piece 312 includes a connecting column 314 and a baffle 313. The connecting column 314 and the baffle 313 are arranged integrally. Specifically, the connecting column 314 is inserted into the through hole 311 and the through hole opened on the bent portion 271. The end of the connecting column 314 away from the baffle 313 is welded and fixed to the pressing plate 25. The connecting column 314 is set to a certain length to provide a certain gap margin between the pressing plate 25 and the bent portion 271, so as to facilitate the movement between the pressing plate 25 and the bent portion 271. In the embodiment of the present application, the water-absorbing gasket 31 is set to be a water-absorbing and expanding material.

[0034] The self-adjusting component also includes absorbent cotton 32, which is specifically configured to be cylindrical. The absorbent cotton 32 is fixedly arranged at one end of the spring button 22 close to the main spring 23. The absorbent cotton 32 is inserted into the main spring 23. Specifically, the absorbent cotton 32 still does not contact the valve seat bolt 291 when it absorbs water and expands to its maximum volume.

[0035] A circular through hole is opened at one end of the valve cover 21 near the locking screw sleeve 14 to form a breathing hole 211, and a through hole is also opened obliquely on the side of the valve cover 21 to form a ventilation hole 212. The height of the ventilation hole 212 opening on the outer wall of the valve cover 21 is set to be higher than the opening height of the inner wall of the valve cover 21.

[0036] The implementation principle of the embodiment of the present application is: a low-temperature anti-blocking booster valve, including a pressure regulating assembly, a spring assembly, a valve body 4 and a valve core assembly, and a self-adjusting assembly is also provided in the valve cover 21. This product is suitable for the connection of round-mouth pipes of any size. The low-temperature fluid flows in from the inlet 41 and flows out from the outlet 42. When the fluid enters the pressure chamber 44, it will generate lateral pressure on the metal diaphragm 20, pushing the metal diaphragm 20 upward. The pressure of the main spring 23 can be adjusted by adjusting the adjusting bolt 11. The main spring 23 pushes the valve seat bolt 291 to adjust the valve core assembly, thereby controlling the fluid pressure flowing into the pressure chamber 44.

[0037] In a low temperature environment, the air in the valve cover 21 instantly condenses to form water droplets or frost. The breathing hole 211 and the vent 212 can form a chimney effect in the valve cover 21, thereby increasing the air exchange between the inside of the valve cover 21 and the outside, and discharging the condensed air outward in time. The opening height of the vent 212 in the valve cover 21 is lower than that outside the valve cover 21, and the air flow direction can be forcibly guided, thereby increasing the flow rate of the air flowing into the valve cover 21 to the breathing hole 211.

[0038] When the breathing hole 211 and the vent 212 are blocked by rapidly condensed frost, the water vapor in the valve cover 21 cannot be discharged, and these water droplets will hang on the main spring 23. The pressure inside the valve cover 21 will rise, causing the main spring 23 to increase the pressure on the metal diaphragm 20. The water-absorbing gasket 31 will absorb water and expand in the valve cover 21, causing the volume of the water-absorbing gasket 31 to increase. The water-absorbing gasket 31 pushes the connecting piece 312 toward the end away from the pressure plate 25, and the connecting column 314 applies a pulling force to the pressure plate 25 toward the end away from the metal diaphragm 20, offsetting the excess pressure applied by the main spring 23 on the metal diaphragm 20, thereby maintaining the stable pressure regulation of the valve.

[0039] When the low-temperature fluid stops flowing, the valve cover 21 returns to normal temperature, and the absorbent cotton 32 can maintain a dry environment in the valve cover 21. The breathing holes 211 and the ventilation holes allow forced air circulation to take away moisture from the absorbent cotton 32, thereby keeping the valve cover 21 dry at all times. When the valve cover 21 is in a low-temperature state, the number of condensed water droplets can be reduced.

[0040] The above-mentioned embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several deformations and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A low-temperature booster valve that prevents blocking, characterized in that: The invention comprises a valve core assembly, a valve body (4), a spring assembly and a pressure regulating assembly which are arranged in sequence from top to bottom. The valve body (4) is provided with an inlet (41) and an outlet (42). The top of the valve body (4) is also provided with a threaded opening (46). The spring assembly comprises a valve cover (21). The valve cover (21) is threadedly connected to the threaded opening (46). The connection between the valve cover (21) and the valve body (4) is provided with a diaphragm gasket (28), a metal diaphragm (20) and a diaphragm stopper (27) in sequence. The diaphragm stopper ( One end of the diaphragm stopper (27) abuts against the end of the valve cover (21) close to the valve body (4), the other end of the diaphragm stopper (27) is bent and extended toward the middle position of the valve cover (21) to form a bent portion (271), the metal diaphragm (20) is pressed on the top of the diaphragm stopper (27), the top of the diaphragm gasket (28) abuts against the inner wall of the valve body (4), the spring assembly also includes a valve seat bolt (291), the valve seat bolt (291) is inserted into the metal diaphragm (20), and the valve seat A pressure plate (25) is also pierced through the bolt (291), and a self-adjusting component is also arranged in the valve cover (21), and the self-adjusting component includes a water-absorbing gasket (31), and the water-absorbing gasket (31) is arranged at one end of the bending portion (271) away from the pressure plate (25), and a plurality of circular through holes are opened on the water-absorbing gasket (31) to form a through hole (311), and a connecting piece (312) is arranged in the through hole (311), and the connecting piece (312) includes a connecting column (314) and a baffle (313), and the connecting column (31 4) and the baffle (313) are integrally arranged, the connecting column (314) is inserted into the through hole (311), and the end of the connecting column (314) away from the baffle (313) is welded and fixed to the pressure plate (25), the valve cover (21) is provided with a circular through hole to form a breathing hole (211), and the side of the valve cover (21) is also inclined with a through hole to form a ventilation hole (212), and the opening height of the ventilation hole (212) on the outer wall of the valve cover (21) is higher than the opening height of the inner wall of the valve cover (21).

2. The anti-blocking low-temperature boost valve according to claim 1, characterized in that: The penetration point between the valve seat bolt (291) and the metal diaphragm (20) is sealed, and a nut is threadedly connected to the valve seat bolt (291). The nut and the valve seat bolt (291) are threadedly fixed to press the pressure plate (25) and the metal diaphragm (20). The spring assembly also includes a main spring (23), and the main spring (23) is arranged in the valve cover (21). One end of the main spring (23) abuts against the pressure plate (25).

3. The anti-blocking low-temperature boost valve according to claim 2, characterized in that: The pressure regulating assembly comprises an adjusting bolt (11), a cover (12), a conduit (13) and a locking screw sleeve (14); the inner wall of the locking screw sleeve (14) is provided with a thread; the end of the valve cover (21) close to the locking screw sleeve (14) is provided with a flange; the outer wall of the flange is provided with a thread; the valve cover (21) is threadedly connected with the locking screw sleeve (14); the conduit (13) is fixedly arranged on the top of the locking screw sleeve (14); and the cover (12) is slidably engaged with the conduit (13).

4. The anti-blocking low-temperature boost valve according to claim 3, characterized in that: The adjusting bolt (11) passes through the guide tube (13) and the locking nut (14) in sequence from one end of the sleeve cover (12) away from the valve cover (21), and the end of the adjusting bolt (11) extends into the valve cover (21). A spring button (22) is fixedly provided at one end of the adjusting bolt (11) extending into the valve cover (21). The self-adjusting component also includes absorbent cotton (32), and the absorbent cotton (32) is fixedly provided at one end of the spring button (22) close to the main spring (23), and one end of the spring button (22) away from the adjusting bolt (11) abuts against the main spring (23).

5. The anti-blocking low-temperature boost valve according to claim 4, characterized in that: A compression spring (16) is sleeved on the adjusting bolt (11), one end of the compression spring (16) abuts against the inner wall of the sleeve cover (12), and the other end abuts against the top of the locking nut sleeve (14), and the adjusting bolt (11) is threadedly connected to the valve cover (21).

6. The anti-blocking low-temperature boost valve according to claim 1, characterized in that: The bottom of the valve body (4) is also provided with a valve core opening (43), and the valve core assembly is arranged in the valve core opening (43). The valve core assembly includes a locking stud (56), and the locking stud (56) is threadedly connected to the valve core opening (43). A secondary spring (55) is movably inserted into the locking stud (56), and a guide column (54) is fixedly arranged on the top of the locking stud (56). The side of the guide column (54) is slidably arranged with the side wall of the valve core opening (43), and the bottom of the guide column (54) is in contact with the secondary spring (55).

7. The anti-blocking low-temperature boost valve according to claim 6, characterized in that: A cavity is also provided in the valve body (4) to form a pressure chamber (44), a valve stem (53) is fixedly provided on the top of the guide column (54), an end of the valve stem (53) away from the guide column (54) extends into the pressure chamber (44), and the top of the valve stem (53) abuts against an end of the valve seat bolt (291) away from the valve cover (21).

8. The anti-blocking low-temperature boost valve according to claim 7, characterized in that: A sealing ring (531) is fixedly provided at one end of the valve stem (53) close to the guide column (54), and the sealing ring (531) is embedded in the valve stem (53) and fixed therein. Two protrusions are also provided on the inner wall of the valve body (4) to form a limit block (45), and the sealing ring (531) abuts against the limit block (45).

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