Ball body of low-temperature ball valve

Abstract

The utility model discloses a low-temperature ball valve ball which comprises a ball body, an upper valve rod is fixedly inserted into the upper end of the ball body, a lower valve rod is fixedly inserted into the lower end of the ball body, a circulation opening is formed in the center of the ball body, a sealing sleeve is arranged outside the ball body in a sleeved mode, and the sealing sleeve is composed of two side sleeves. Through holes are formed in the positions, corresponding to the circulation openings, of the side sleeves, penetrating holes are formed in the positions, corresponding to the upper valve rod and the lower valve rod, of the upper ends and the lower ends of the side sleeves, annular grooves are formed in the side edges of the upper valve rod and the lower valve rod, and clamping sleeves are fixedly arranged at the positions, corresponding to the annular grooves, of the side sleeves. The clamping sleeves are arranged in the corresponding annular grooves in a clamped mode and fixedly connected with the annular grooves through first bolts, a pressure relief opening is formed in the position, located at the lower end of the circulation opening, of the ball body in a communicating mode, a high-elasticity spring is fixedly arranged in the pressure relief opening, and a pressure relief plate is fixedly arranged at the upper end of the high-elasticity spring. The pressure relief valve is high in sealing performance and capable of achieving pressure relief.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valve spheres, and more specifically to a low-temperature ball valve sphere. Background Art

[0002] A ball valve is a kind of valve that uses a ball as a closing part. The ball can be driven to rotate by a rotating drive device so that the ball flow port coincides with or is perpendicular to the valve body flow port, thereby realizing the opening and closing of the valve. It can also be used for the regulation and control of fluids and gases. Among them, the cryogenic ball valve is mainly suitable for chemical plants such as ethylene and liquefied natural gas, and its output liquid cryogenic media such as ethylene, liquid oxygen, and liquid hydrogen. The existing cryogenic ball valve ball still has shortcomings in the process of being used in conjunction with the valve body. The ball gradually shrinks to a certain extent under low temperature conditions, thereby causing the matching gap between the ball and the sealing member in the valve body to gradually increase, and the medium is easy to leak from here. In addition, the contraction of the ball will cause the ball to contain less, thereby causing the pressure on the ball to increase. In severe cases, the ball is easy to burst, which will threaten the life safety of the staff. Therefore, the utility model proposes a cryogenic ball valve ball. Utility Model Content

[0003] The utility model aims to provide a low-temperature ball valve ball body with strong sealing performance and capable of achieving pressure relief.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A low-temperature ball valve ball, comprising a ball body, an upper valve stem is inserted and fixedly provided at the upper end of the ball body, a lower valve stem is inserted and fixedly provided at the lower end of the ball body, a flow port is provided in the center of the ball body, a sealing sleeve is provided on the outer sleeve of the ball body, the sealing sleeve is composed of two side sleeves, the side sleeves are provided with through holes at positions corresponding to the flow port, the upper and lower ends of the side sleeves are provided with through holes at positions corresponding to the upper valve stem and the lower valve stem, the upper valve stem and the lower valve stem are provided with annular grooves on the sides, the side sleeves are fixedly provided with clamping sleeves at positions corresponding to the annular grooves, the clamping sleeves are clamped in the corresponding annular grooves and fixedly connected by bolts, the ball body is provided with a pressure relief port at the lower end thereof, a high-elasticity spring is fixedly provided in the pressure relief port, and a pressure relief plate is fixedly provided at the upper end of the high-elasticity spring.

[0006] By adopting the above technical solution, the utility model has the following advantages:

[0007] The provision of the sealing sleeve of the utility model effectively enhances the sealing performance between the ball body and the valve seat. When the ball body contracts under low temperature conditions, the sealing sleeve has a certain elastic force, which can make the ball body still abut against the valve seat, and can effectively prevent leakage of the medium. The provision of the clamping sleeve allows the sealing sleeve to be separated into two side sleeves, which is convenient for the installation and replacement of the sealing sleeve. The provision of the pressure relief port, the high-elastic spring and the pressure relief plate of the utility model makes it possible for the pressure in the ball body to suddenly increase when the ball body contracts under low temperature conditions. At this time, the medium can squeeze the pressure relief plate, increase the storage capacity of the ball body, thereby reducing the pressure in the ball body, which can effectively prevent the ball body from bursting, and is safer to use.

[0008] Furthermore, a bolt groove one is provided at a position of the ferrule corresponding to the bolt one, and the bolt one is located in the bolt groove one.

[0009] By adopting the above technical solution, the utility model has the following advantages:

[0010] The arrangement of the bolt groove 1 of the utility model ensures that the bolt 1 does not protrude from the clamping sleeve, so that the upper valve stem can be inserted into the valve stem hole of the valve body.

[0011] Furthermore, an inner groove and a convex portion are respectively provided on one side of the side sleeve that contacts the side sleeve, and a widened portion is provided on one end of the convex portion away from the side sleeve, and the inner groove matches the convex portion and the widened portion.

[0012] By adopting the above technical solution, the utility model has the following advantages:

[0013] The arrangement of the convex portion and the widened portion of the utility model strengthens the connection strength of the side sleeve connection.

[0014] Furthermore, an annular limit groove is provided on one side of the pressure relief port, an annular limit plate is fixedly provided at the position of the pressure relief plate corresponding to the annular limit groove, an inner ring groove is provided on the side of the annular limit plate away from the pressure relief plate, and a sealing ring is fixedly provided in the inner ring groove.

[0015] By adopting the above technical solution, the utility model has the following advantages:

[0016] The provision of the annular limiting groove and the annular limiting plate of the utility model can effectively prevent the pressure relief plate from leaving the pressure relief port. The provision of the sealing ring strengthens the sealing performance between the annular limiting plate and the pressure relief port, and can effectively prevent the medium from leaking to the lower end of the pressure relief plate.

[0017] Furthermore, a fixing groove is provided between the annular limiting groove and the flow port, and a fixing ring plate is fixed in the fixing groove by a plurality of screws.

[0018] By adopting the above technical solution, the utility model has the following advantages:

[0019] The arrangement of the fixing groove and the fixing ring plate of the utility model enables the high-elasticity spring and the pressure relief plate to be taken out and replaced when the fixing ring plate is taken out.

[0020] Furthermore, the upper end surfaces of the fixed ring plate and the pressure relief plate match the inner curvature of the flow port.

[0021] By adopting the above technical solution, the utility model has the following advantages:

[0022] The above arrangement of the utility model can effectively prevent the fixed ring plate and the pressure relief plate from being impacted by the medium, and also ensure that the fixed ring plate and the pressure relief plate will not affect the circulation of the medium.

[0023] Furthermore, the spherical body includes an upper hemisphere and a lower hemisphere, the lower end of the upper hemisphere is fixed with an annular fixing portion, the upper end of the lower hemisphere is provided with an annular inner groove at a position corresponding to the annular fixing portion, the annular fixing portion is clamped in the corresponding annular inner groove, and the side of the lower hemisphere is provided with a plurality of bolt grooves 2 at positions corresponding to the annular inner groove, the bolt grooves 2 are provided with bolts 2, and the bolts 2 pass through the lower hemisphere and are fixedly connected to the annular fixing portion.

[0024] By adopting the above technical solution, the utility model has the following advantages:

[0025] The annular fixing portion and the annular inner groove of the utility model enable the spherical body to be separated, thereby facilitating the subsequent replacement of the pressure relief plate and the high-elasticity spring, and also facilitating the subsequent cleaning of the inner side of the spherical body.

[0026] Furthermore, a sealing ring groove is provided at the lower end of the upper hemisphere, and a sealing ring 2 is fixedly provided in the sealing ring groove.

[0027] By adopting the above technical solution, the utility model has the following advantages:

[0028] The provision of the sealing ring 2 of the utility model strengthens the sealing performance between the upper hemisphere and the lower hemisphere, and can effectively prevent medium leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0031] Figure 2 This is a schematic diagram of the sealing sleeve structure of the utility model;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of the sealing sleeve connection of the utility model;

[0033] Figure 4This is a schematic diagram of the left-side cross-sectional structure of the utility model;

[0034] Figure 5 For this utility model Figure 1 Enlarged structural diagram at A in the middle.

[0035] Figure numerals: 1. side sleeve; 101. through hole; 102. through hole; 2. ferrule; 201. bolt groove one; 3. pressure relief plate; 301. annular limit plate; 302. inner ring groove; 4. flow port; 401. pressure relief port; 402. annular limit groove; 403. fixing groove; 5. upper hemisphere; 501. annular fixing part; 502. sealing ring groove; 6. lower hemisphere; 601. annular inner groove; 602. bolt groove two; 7. convex part; 701. widened part; 8. upper valve stem; 9. fixing ring plate; 10. lower valve stem; 11. bolt one; 12. annular groove; 13. high elastic spring; 14. bolt two; 15. sealing ring two; 16. sealing ring one; 17. inner groove. DETAILED DESCRIPTION

[0036] like Figure 1 to Figure 2 As shown, in the specific embodiment, a low-temperature ball valve ball includes a ball body, an upper valve stem 8 is inserted and fixedly provided at the upper end of the ball body, a lower valve stem 10 is inserted and fixedly provided at the lower end of the ball body, a flow port 4 is provided in the center of the ball body, a sealing sleeve is provided on the outer sleeve of the ball body, and the sealing sleeve is composed of two side sleeves 1. The side sleeves 1 are provided with through holes 101 at positions corresponding to the flow port 4, and the upper and lower ends of the side sleeves 1 are provided with through holes 102 at positions corresponding to the upper valve stem 8 and the lower valve stem 10. The upper valve stem 8 and the lower valve stem 10 are provided with annular grooves 12 on the sides, and the side sleeves 1 are fixedly provided with clamping sleeves 2 at positions corresponding to the annular grooves 12. The clamping sleeves 2 are clamped in the corresponding annular grooves 12 and fixedly connected by bolts 11. The ball body is located at the lower end of the flow port 4 and is provided with a pressure relief port 401. A high-elastic spring 13 is fixedly provided in the pressure relief port 401, and a pressure relief plate 3 is fixedly provided at the upper end of the high-elastic spring 13.

[0037] Through the above settings, the setting of the sealing sleeve of the utility model effectively enhances the sealing performance between the ball body and the valve seat. When the ball body shrinks under low temperature conditions, the sealing sleeve has a certain elastic force, which can make the ball body still against the valve seat, and can effectively prevent the leakage of the medium. The setting of the sleeve 2 allows the sealing sleeve to be separated into two side sleeves 1, which is convenient for the installation and replacement of the sealing sleeve; the setting of the pressure relief port 401, the high elastic spring 13 and the pressure relief plate 3 of the utility model makes it possible that when the ball body shrinks under low temperature conditions, the pressure in the ball body will suddenly increase. At this time, the medium can squeeze the pressure relief plate 3, increase the storage capacity of the ball body, thereby reducing the pressure in the ball body, which can effectively prevent the ball body from bursting, and is safer to use.

[0038] like Figures 1 to 3As shown, a bolt groove 201 is provided at the position of the clamping sleeve 2 corresponding to the bolt 11, and the bolt 11 is located in the bolt groove 1; an inner groove 17 and a convex portion 7 are respectively provided on the side of the side sleeve 1 in contact with the side sleeve 1, and a widened portion 701 is provided at the end of the convex portion 7 away from the side sleeve 1, and the inner groove 17 matches the convex portion 7 and the widened portion 701.

[0039] Through the above arrangement, the arrangement of the bolt groove 1 of the utility model ensures that the bolt 11 does not protrude from the sleeve 2, so that the upper valve stem 8 can be inserted into the valve stem hole of the valve body; the arrangement of the convex portion 7 and the widened portion 701 of the utility model strengthens the connection strength of the side sleeve 1 connection.

[0040] like Figure 1 , Figure 4 and Figure 5 As shown, an annular limiting groove 402 is provided on one side of the pressure relief port 401, and an annular limiting plate 301 is fixedly provided at the position of the pressure relief plate 3 corresponding to the annular limiting groove 402. An inner annular groove 302 is provided on the side of the annular limiting plate 301 away from the pressure relief plate 3, and a sealing ring 16 is fixedly provided in the inner annular groove 302; a fixing groove 403 is provided between the annular limiting groove 402 and the flow port 4, and a fixing ring plate 9 is fixed in the fixing groove 403 by a plurality of screws; the fixing ring plate 9 and the upper end surface of the pressure relief plate 3 match the inner curvature of the flow port 4; the spherical body includes an upper hemisphere 5 and the lower hemisphere 6, an annular fixing part 501 is fixedly provided at the lower end of the upper hemisphere 5, an annular inner groove 601 is provided at the upper end of the lower hemisphere 6 corresponding to the annular fixing part 501, the annular fixing part 501 is clamped in the corresponding annular inner groove 601, a plurality of bolt grooves 602 are provided at the side of the lower hemisphere 6 corresponding to the annular inner groove 601, bolt grooves 602 are provided with bolts 14, bolts 14 penetrate through the lower hemisphere 6 and are fixedly connected with the annular fixing part 501; a sealing ring groove 502 is provided at the lower end of the upper hemisphere 5, a sealing ring 15 is fixedly provided in the sealing ring groove 502.

[0041] Through the above settings, the settings of the annular limiting groove 402 and the annular limiting plate 301 of the utility model can effectively prevent the pressure relief plate 3 from leaving the pressure relief port 401, and the setting of the sealing ring 16 strengthens the sealing performance between the annular limiting plate 301 and the pressure relief port 401, which can effectively prevent the medium from leaking to the lower end of the pressure relief plate 3; the setting of the fixed groove 403 and the fixed ring plate 9 of the utility model enables the high elastic spring 13 and the pressure relief plate 3 to be taken out and replaced when the fixed ring plate 9 is taken out; the above settings of the utility model can effectively prevent the fixed ring plate 9 and the pressure relief plate 3 from being impacted by the medium, and also ensure that the fixed ring plate 9 and the pressure relief plate 3 will not affect the circulation of the medium; the setting of the annular fixing part 501 and the annular inner groove 601 of the utility model enables the spherical body to be separated, thereby facilitating the subsequent replacement of the pressure relief plate 3 and the high elastic spring 13, and also facilitating the subsequent cleaning of the inner side of the spherical body; the setting of the sealing ring 2 15 of the utility model strengthens the sealing performance between the upper hemisphere 5 and the lower hemisphere 6, which can effectively prevent the medium from leaking.

[0042] Working principle: When in use, when the ball shrinks in a low temperature state, the elastic force of the sealing sleeve will make the outer surface of the ball always against the valve seat, thereby playing a sealing role and preventing the leakage of the medium. When the ball shrinks, the internal pressure will suddenly increase. The increase in pressure will squeeze the pressure relief plate 3 to move to the side of the high-elastic spring 13, thereby squeezing the high-elastic spring 13 to increase the capacity inside the ball, thereby effectively reducing the internal pressure and effectively preventing the ball from bursting. When the sealing sleeve needs to be replaced, just take out the bolt 11 and then pull the side sleeves 1 on both sides to both sides. Excessive pulling force will make the widened part 701 Leaving the inner groove 17 can realize the separation of the side sleeve 1, so that the sealing sleeve can be removed for replacement. When the pressure relief plate 3 and the high-elastic spring 13 need to be replaced, it is only necessary to take out the sealing sleeve, remove the bolt 2 14 to separate the upper hemisphere 5 from the lower hemisphere 6, and then take out the screws and remove the fixing ring plate 9. Then, the pressure relief plate 3 and the high-elastic spring 13 can be replaced, which effectively extends the service life of the ball. The fixing methods of the bolt 1 11, the bolt 2 14, the screws, the high-elastic spring 13, the upper valve stem 8, the lower valve stem 10 and the ball body of the utility model are all disclosed in the prior art, so this application will not go into too much detail.

[0043] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A cryogenic ball valve ball, comprising a ball body, an upper valve stem (8) is inserted and fixedly provided at the upper end of the ball body, a lower valve stem (10) is inserted and fixedly provided at the lower end of the ball body, and a flow port (4) is provided at the center of the ball body, characterized in that: The outer sleeve of the spherical body is provided with a sealing sleeve, and the sealing sleeve is composed of two side sleeves (1). The side sleeve (1) is provided with a through hole (101) at a position corresponding to the flow port (4), and the upper and lower ends of the side sleeve (1) are provided with a through hole (102) corresponding to the position of the upper valve stem (8) and the lower valve stem (10). The sides of the upper valve stem (8) and the lower valve stem (10) are provided with an annular groove (12). The side sleeve (1) is fixed with a clamping sleeve (2) at a position corresponding to the annular groove (12), and the clamping sleeve (2) is clamped in the corresponding annular groove (12) and fixedly connected by a bolt (11). The spherical body is provided with a pressure relief port (401) at the lower end thereof, and a high-elasticity spring (13) is fixedly provided in the pressure relief port (401), and a pressure relief plate (3) is fixedly provided at the upper end of the high-elasticity spring (13).

2. A cryogenic ball valve ball according to claim 1, characterized in that: The sleeve (2) is provided with a bolt groove (201) at a position corresponding to the bolt (11), and the bolt (11) is located in the bolt groove (201).

3. A cryogenic ball valve ball according to claim 2, characterized in that: The side of the side sleeve (1) in contact with the side sleeve (1) is respectively provided with an inner groove (17) and a convex portion (7), and the end of the convex portion (7) away from the side sleeve (1) is provided with a widened portion (701), and the inner groove (17) matches the convex portion (7) and the widened portion (701).

4. A cryogenic ball valve ball according to claim 1, characterized in that: An annular limiting groove (402) is provided on one side of the pressure relief port (401); an annular limiting plate (301) is fixedly provided on the pressure relief plate (3) at a position corresponding to the annular limiting groove (402); an inner annular groove (302) is provided on the side of the annular limiting plate (301) away from the pressure relief plate (3); a sealing ring (16) is fixedly provided in the inner annular groove (302).

5. A cryogenic ball valve ball according to claim 4, characterized in that: A fixing groove (403) is provided between the annular limiting groove (402) and the flow port (4), and a fixing ring plate (9) is fixed in the fixing groove (403) by a plurality of screws.

6. A cryogenic ball valve ball according to claim 5, characterized in that: The upper end surfaces of the fixed ring plate (9) and the pressure relief plate (3) match the inner curvature of the flow opening (4).

7. A cryogenic ball valve ball according to claim 1, characterized in that: The spherical body comprises an upper hemisphere (5) and a lower hemisphere (6); an annular fixing portion (501) is fixedly provided at the lower end of the upper hemisphere (5); an annular inner groove (601) is provided at the upper end of the lower hemisphere (6) at a position corresponding to the annular fixing portion (501); the annular fixing portion (501) is clamped in the corresponding annular inner groove (601); a plurality of bolt grooves (602) are provided at the side of the lower hemisphere (6) at a position corresponding to the annular inner groove (601); bolts (14) are provided in the bolt grooves (602); the bolts (14) penetrate the lower hemisphere (6) and the annular fixing portion (501) to be fixedly connected.

8. A cryogenic ball valve ball according to claim 7, characterized in that: A sealing ring groove (502) is provided at the lower end of the upper hemisphere (5), and a second sealing ring (15) is fixedly provided in the sealing ring groove (502).

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