A hand-operated ball valve and method of use

Abstract

The application discloses a manual ball valve and a use method, and relates to the technical field of valve sealing. The manual ball valve comprises a valve body, inlet and outlet channels arranged on the two sides of the valve body, a valve cavity arranged between the inlet and outlet channels, a valve cover arranged in the inlet and outlet channels, a ball arranged in the valve cavity, a valve rod arranged above the ball, a lower end of the valve rod being fixedly connected with the ball, a ball liner arranged between the valve cover and the ball, a gasket one and a gasket two arranged outside the ball liner, an O-shaped ring one arranged between the gasket one and the gasket two, and a disc spring arranged between the ball liner and the valve cover. According to the application, double sealing is arranged on the ball liner, that is, disc spring sealing and sealing structure composed of the gasket one, the gasket two and the O-shaped ring one, so that double elastic compensation of the ball liner is realized, and the sealing performance is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valve sealing, in particular to a manual ball valve and a use method. BACKGROUND

[0002] With the development of petroleum chemical industry, especially the storage, transportation and wide application of ultra-low temperature products such as liquefied natural gas, liquid oxygen and liquid nitrogen, the requirements for ball valves applied under ultra-low temperature working conditions are also increasing. Liquefied natural gas, abbreviated as LNG, is natural gas cooled to-162 DEG C under normal pressure, so that the natural gas becomes liquid; a large number of ultra-low temperature ball valves are required in the liquefaction process of natural gas.

[0003] The sealing performance is one of the important indicators of the quality of the valve, and the existing ultra-low temperature ball valve usually uses a single sealing ring to seal between the ball and the valve seat. For example, the Chinese patent application for invention with the publication number CN114033865A discloses an upper-mounted ultra-low temperature fixed ball valve and a mounting method, a soft sealing ring is arranged on the contact surface of the front valve seat and the rear valve seat and the ball, and the soft sealing ring is used to ensure the sealing effect of the front valve seat and the rear valve seat in contact with the ball.

[0004] In the above technical scheme, the sealing surface between the valve seat and the ball is in full contact, and the sealing surface is easy to wear during the rotation of the ball, causing the valve to leak and reducing the service life of the ball valve. SUMMARY

[0005] The application aims to provide a manual ball valve and a use method, and solve the problem of the sealing performance of the ball valve being reduced due to the single sealing structure in the existing ball valve.

[0006] To achieve the above-mentioned purpose, the application adopts the following technical scheme: a manual ball valve, comprising: a valve body, the valve body is provided with inlet and outlet channels on both sides, and a valve cavity is arranged between the inlet and outlet channels; a valve cover, the valve cover is arranged in the inlet and outlet channels; a ball, the ball is arranged in the valve cavity; a valve stem, the valve stem is arranged above the ball, and the lower end of the valve stem is fixedly connected with the ball; a ball liner is arranged between the valve cover and the ball; a gasket one and a gasket two are arranged on the outer side of the ball liner; an O-ring one is arranged between the gasket one and the gasket two; a disc spring is arranged between the ball liner and the valve cover.

[0007] In the above technical scheme, the application embodiment sets double seals on the ball liner, that is, the disc spring seal and the sealing structure composed of the gasket one, the gasket two and the O-ring one, so as to realize the double elastic compensation of the ball liner and ensure the sealing performance.

[0008] Further, according to the application, the ball is provided with a ball base below.

[0009] Furthermore, according to an embodiment of this application, a washer five and a washer six are provided between the valve stem and the valve body being delivered.

[0010] Furthermore, according to an embodiment of this application, an O-ring is provided between the valve stem and the valve body being fed.

[0011] Furthermore, according to an embodiment of this application, a handle is provided at the upper end of the valve stem.

[0012] Furthermore, according to an embodiment of this application, a handle cover is provided above the handle.

[0013] Furthermore, according to the embodiments of this application, it also includes a limiting adjustment component, including a fixed knob, an adjustment housing sleeved on the surface of the fixed knob, a rotating component, a rotation limiting component, and an anti-drop component. The fixed knob has an "I" shaped structure, a fixed groove is provided at the lower end of the fixed knob, and an internal thread is provided inside the fixed groove, which is threaded to the top of the manual ball valve. The adjustment housing is fixedly sleeved on the middle end of the fixed knob and is coaxially arranged with the fixed knob. The rotating component and the rotation limiting component are provided on the surface of the rotating handle and the fixed knob, and limit the rotating handle to rotate counterclockwise.

[0014] To achieve the above objectives, this application also discloses a method for using a manual ball valve, comprising the following steps:

[0015] Turning the handle causes the valve stem to rotate, which in turn causes the ball to rotate;

[0016] When the sphere rotates to the "on" position, the pipe is connected, and the liquid substance flows through; conversely, the pipe is disconnected.

[0017] Furthermore, according to the embodiments of this application, during operation, the disc spring contracts under ultra-low temperature conditions, and the spring corresponding to the ball liner rebounds, so that the ball liner and the valve body are always in sealed contact.

[0018] To achieve the above objectives, this application also discloses a cryogenic device having a manual ball valve as described above.

[0019] Compared with the prior art, this application has the following beneficial effects: This application achieves double elastic compensation for the ball liner by setting a double seal on the ball liner, namely a disc spring seal and a sealing structure consisting of washer one, washer two and O-ring one, thus ensuring its sealing performance. Attached Figure Description

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0021] Fig. 1 This is a schematic diagram of the structure of a manual ball valve in this application.

[0022] Fig. 2Fig. 1 is a perspective view of a manual ball valve according to the present application;

[0023] Fig. 3 Fig. 2 is a top view of a manual ball valve according to the present application;

[0024] Fig. 4 Fig. 3 is a bottom view of a manual ball valve according to the present application;

[0025] Fig. 5 Fig. 4 is a perspective view of an adjusting member according to the present application;

[0026] Fig. 6 Fig. 5 is a sectional view of an adjusting member according to the present application.

[0027] In the drawings

[0028] 1. valve cover 2. ball liner 3. gasket 1

[0029] 4. O-ring 1 5. valve body 6. gasket 2

[0030] 7. disc spring 8. ball base 9. gasket 3

[0031] 10. O-ring 2 11. gasket 6 12. O-ring 3

[0032] 13. bearing 14. ball 15. valve stem

[0033] 16. O-ring 4 17. gasket 4 18. gasket 5

[0034] 19. handle 20. handle cover 21. limit post

[0035] 22. positioning groove 23. positioning post 24. steel wire

[0036] 25. pawl 26. adjusting housing 27. fixing groove

[0037] 28. fixing knob 29. ratchet 30. limit groove

[0038] 31. spring piece 32. fixing shaft DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions of the present application clear, complete and the advantages more clear and understandable, the following will further describe the embodiments of the present application in combination with the drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present application, but not all the embodiments. They are used to explain the embodiments of the present application, and do not limit the embodiments of the present application. All other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are presented to provide a thorough understanding of the embodiments. However, it is obvious that these embodiments can not be limited to these specific details in practice. In some examples, well-known methods and structures are not described in detail to avoid unnecessarily complicating these embodiments. In addition, all embodiments can be used in combination with each other.

[0043]

Example 1

[0044] As Figs. 1-2 shown, the present application discloses a kind of manual ball valve, including valve body 5, valve cover 1, ball 14, ball base 8, valve stem 15.Valve body 1 both sides are provided with inlet and outlet passage, valve cover 1 is installed in inlet and outlet passage by thread.The through valve cavity between inlet and outlet passage is arranged, ball 14 is arranged in valve cavity, ball base 8 is arranged below ball 14, valve stem 15 is arranged above ball 14, valve stem 15 is fixedly connected with ball 14, drives ball 14 to rotate by rotating valve stem.

[0045] Further, the end of valve cover 1 is provided with anti-leak groove, the edge of anti-leak groove is in abutment with the inner wall of inlet and outlet passage.O-ring three 12 is arranged in anti-leak groove, which plays a sealing role.O-ring three 12 is arranged on the outer side of anti-leak groove

[0046] Between the valve cover 1 and the ball 14, there is also a ball liner 2, which is a hollow metal piece. Specifically, the ball liner 2 is a hollow tubular structure, one end of which is inserted into the valve cover 1, and the other end is in contact with the ball 14.

[0047] The outer side is sleeved with a gasket one 3 and a gasket two 6, which are made of a new type of high polymer material, which not only plays a sealing role, but also ensures that the ball operates more smoothly. Further, between the gasket one 3 and the gasket two 6, there is also an O-ring one 4, which further ensures the sealing between the ball liner 2 and the valve body 5.

[0048] Between the ball liner 2 and the valve cover 1, there is also a disc spring 7. The disc spring 7 can exert a compensating force on the ball liner when the ball valve is running and the ball liner is shrinking in a low temperature state, so as to obtain better sealing effect.

[0049] Between the ball valve base 8 and the valve body 5, there are also a gasket three 9 and an O-ring two 10, which are used to ensure the sealing between the ball valve base 8 and the valve body 5.

[0050] Between the valve stem 15 and the valve body 5, there are a gasket five 17 and a gasket six 18, which are used to prevent the valve stem from rotating eccentrically when the ball valve is opened and closed, causing medium leakage. There is also an O-ring three 16, which is used to prevent medium from leaking from the valve stem when the ball valve is working.

[0051] The upper and lower ends of the ball 14 are provided with bearings 13 for preventing the ball from rotating eccentrically when the ball valve is opened and closed.

[0052] A handle 19 and a handle cover 20 are arranged at the upper end of the valve stem 15, which mainly realize the transmission of the handle and the ball, and also play a limiting role.

[0053]

Embodiment 2

[0054] The application also discloses a use method of the manual ball valve, which comprises the following steps:

[0055] 1) Rotate the handle to drive the valve stem to rotate, thereby driving the ball to rotate;

[0056] 2) When the ball is rotated to the connected position, the pipeline is connected, and the liquid substance passes through; on the contrary, the pipeline is cut off;

[0057] When working, the disc spring shrinks in an ultra-low temperature state, and the spring corresponding to the ball liner rebounds, so that the ball liner and the valve body are always in sealing contact.

[0058]

Embodiment 3

[0059] On the basis of the embodiment 1, the manual ball valve further comprises:

[0060] A positioning groove 22 is arranged on the surface of the rotating handle 19.

[0061] Positioning pin 23 is fixed to the top surface of the manual ball valve; and

[0062] The limiting adjustment component includes a fixed knob 28, an adjustment housing 26 fitted on the surface of the fixed knob 28, a rotating component, a rotation limiting component, and an anti-drop component. The fixed knob 28 has an "I" shaped structure. A fixing groove is provided at the lower end of the fixed knob 28, and an internal thread is provided inside the fixing groove, which is threaded to the top of the manual ball valve. The adjustment housing 26 is fixedly fitted on the middle end of the fixed knob 28 and is coaxially arranged with the fixed knob 28. The rotating component and the rotation limiting component are provided on the surface of the rotating handle 19 and the fixed knob 28, and limit the rotating handle 19 to rotate counterclockwise.

[0063] The positioning groove 22 and the positioning column 23 cooperate to limit the rotation of the fixed groove 27 by 90 degrees, so that the opening and closing of the rotating handle 19 is more precise. The adjusting component is installed on the top of the manual ball valve through the threaded connection between the fixed knob 28 and the manual ball valve.

[0064] To enable simultaneous rotation of the handle 19 and the ratchet 29, the rotating component includes the ratchet 29, a limiting groove 30 on the surface of the ratchet 29, and a limiting post 21 that engages with the limiting groove 30. The limiting post 21 is fixed to the upper surface of the handle 19 near the manual ball valve. The ratchet 29 is located inside the adjusting housing 26 and is sleeved on the outer surface of the fixed knob 28. The ratchet 29 and the fixed knob 28 are coaxially arranged, and the ratchet 29 rotates around the axis of the fixed knob 28. There are two sets of limiting posts 21 and multiple sets of limiting grooves 30, which are distributed circumferentially around the axis of the fixed knob 28.

[0065] The ratchet 29 is fitted onto the outer surface of the fixed knob 28, allowing the ratchet 29 to rotate freely. The multiple sets of limiting grooves 30 on the surface of the ratchet 29 are inserted and engaged with the limiting post 21, which not only limits the installation of the adjustment component, but also enables the ratchet 29 to rotate together when the handle 19 is rotated.

[0066] To adjust the rotation angle of the rotating handle 19, the rotation limiting component includes a wire rope 24, a pawl 25, a spring piece 31, and a fixed shaft 32. The fixed shaft 32 is located inside the adjusting housing 26, and its two ends are connected to the upper and lower inner walls of the adjusting housing 26. There are two sets of fixed shafts 32. The outer surface of one set of fixed shafts 32 is fitted with a pawl 25, and the outer surface of the other set of fixed shafts 32 is fitted with a spring piece 31. The spring piece 31 abuts against one end of the pawl 25 and always contacts the ratchet tooth 29, thereby limiting the clockwise rotation of the ratchet tooth 29. The pawl 25 is connected to the positioning post 23 via the wire rope 24.

[0067] The pawl 25 is abutted against the teeth arranged on the outer surface of the ratchet 29 by the elastic sheet 31, so as to prevent the rotating handle 19 from rotating clockwise, and when the rotating handle 19 rotates counterclockwise, the angle of the rotating handle 19 rotating counterclockwise can be accurately adjusted by arranging the teeth with different angles on the surface of the ratchet 29.

[0068] In order to ensure that the rotating handle 19 can rotate clockwise, a fixed slot 27 is arranged on the surface of the adjusting shell 26, and the other end of the pawl 25 extends out of the adjusting shell 26 through the fixed slot 27.

[0069] By pushing the pawl 25 extending out of the outer side of the adjusting shell 26, the abutment of the pawl 25 against the ratchet 29 is cancelled, so that the rotating handle 19 can rotate clockwise.

[0070] Although the above describes the specific embodiments of the present application in detail, so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, all the application creations utilizing the concept of the present application are within the protection scope of the present application as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims.

Claims

1. A manual ball valve characterized in that, include: The valve body has inlet and outlet channels on both sides, and a through valve cavity is provided between the inlet and outlet channels; Valve cover, the valve cover being disposed within the inlet / outlet channel; A sphere, wherein the sphere is disposed within the valve cavity; A valve stem is disposed above the ball, and the lower end of the valve stem is fixedly connected to the ball; A ball bushing is provided between the valve cover and the ball; a washer one and a washer two are provided on the outside of the ball bushing; an O-ring one is provided between the washer one and the washer two; a disc spring is provided between the ball bushing and the valve cover; It also includes a limit adjustment component, including a fixed knob, an adjustment housing fitted on the surface of the fixed knob, a rotating component, a rotation limit component, and an anti-drop component. The fixed knob has an "I" shaped structure, with a fixed groove at the lower end of the fixed knob and an internal thread inside the fixed groove, which mates with the thread at the top of the manual ball valve. The adjustment housing is fixedly fitted onto the middle of the fixed knob and is coaxially arranged with the fixed knob. The rotating component and the rotation limit component are arranged on the surface of the rotating handle and the fixed knob, and limit the rotating handle to rotate counterclockwise. The rotating component includes a ratchet, a limiting groove on the surface of the ratchet, and a limiting post that engages with the limiting groove. The limiting post is fixed to the upper surface of the rotating handle near the manual ball valve. The ratchet is located inside the adjusting housing and is sleeved on the outer surface of the fixed knob. The ratchet is coaxial with the fixed knob and rotates around the axis of the fixed knob. There are two sets of limiting posts and multiple sets of limiting grooves, which are distributed circumferentially around the axis of the fixed knob.

2. A manual ball valve according to claim 1, characterized in that A sphere base is provided below the sphere.

3. A manual ball valve according to claim 1, wherein Washer five and washer six are provided between the valve stem and the valve body.

4. A manual ball valve according to claim 1, wherein An O-ring is provided between the valve stem and the valve body.

5. A manual ball valve according to claim 1, wherein A handle is provided at the upper end of the valve stem.

6. A manual ball valve according to claim 5, wherein A handle cover is provided above the handle.

7. A method of using the manual ball valve of claim 1, wherein, Includes the following steps: Turning the handle causes the valve stem to rotate, which in turn causes the ball to rotate; When the sphere rotates to the open position, the pipeline is connected, and the liquid substance passes through; otherwise, the pipeline is cut off.

8. The method of using a manual ball valve according to claim 7, wherein, During operation, the disc spring contracts under ultra-low temperature conditions, and the spring corresponding to the ball liner rebounds, ensuring that the ball liner and valve body are always in sealed contact.

9. A cryogenic device, characterized by It has a manual ball valve as described in any one of claims 1-6.

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