Ball valve with seismic design

Abstract

The utility model discloses a ball valve with anti -shock design, it includes valve body, valve cover, valve ball, valve stem, reverse seal bearing, two valve seats and two plate springs, the top of valve cover is connected in the valve body, and the valve cavity is formed between valve body and valve cover, two valve seats respectively adhere to the both sides of valve ball, two plate springs are respectively pressed between two valve seats and valve body, and the valve stem rotatably is worn in valve cover, and the valve stem is connected in the top of valve ball, and the outer periphery of valve stem has the step structure that protrudes outward, and the step structure is located between valve cover and valve ball, and the reverse seal bearing is sleeved in the valve stem, and the reverse seal bearing is set up between step structure and valve cover. Through plate spring, can ensure that valve ball and valve seat always closely adhere, effectively avoid instantaneous seal loss, and can protect precision sealing surface from impact damage. Reverse seal bearing and step structure can ensure that the valve stem is not blown out from the valve body by medium pressure, effectively prevent the occurrence of catastrophic accident, and greatly improve the safety stability.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and in particular to a ball valve with anti-vibration design. Background Technology

[0002] Ball valves are widely used in fields with extremely high safety requirements, such as nuclear power plants, petrochemical plants, and long-distance pipelines. However, they are prone to extreme operating conditions such as severe vibration and pipeline deformation. Traditional ball valves are prone to the following problems under severe vibration conditions: 1. Loose bolts leading to leakage; 2. Damage to the valve stem and internal parts due to vibration and impact; 3. Failure of the sealing pair due to slight displacement of parts; 4. The connection between the valve and the pipeline becomes a weak point. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of existing products. This invention provides a ball valve with anti-vibration design.

[0004] This utility model is achieved through the following technical solution:

[0005] A ball valve with anti-vibration design includes a valve body, a valve cover, a valve ball, a valve stem, a back-sealing bearing, two valve seats, and two leaf springs. The valve cover is connected to the top of the valve body, forming a valve cavity between the valve body and the valve cover. The valve ball, the back-sealing bearing, the two valve seats, and the two leaf springs are all located within the valve cavity. The two valve seats are respectively fitted against both sides of the valve ball. The two leaf springs are respectively pressed between the two valve seats and the valve body. The valve stem is rotatably inserted through the valve cover and is connected to the top of the valve ball, driving the valve ball to rotate. The outer circumferential surface of the valve stem has an outwardly protruding stepped structure, which is located between the valve cover and the valve ball. The back-sealing bearing is sleeved on the valve stem and is disposed between the stepped structure and the valve cover.

[0006] Furthermore, a support ring component is provided between each of the two valve seats and the two leaf springs. The support ring component includes a first support ring, a second support ring, and a sealing packing. The opposite sides of the first support ring and the second support ring respectively abut against the valve seat and the leaf spring, and the sealing packing is disposed between the first support ring and the second support ring.

[0007] Furthermore, an O-ring is pressed between the first support ring and the valve seat;

[0008] And / or, the second support ring extends along the inner wall surface of the valve body, and a dustproof packing is pressed between the second support ring and the inner wall surface of the valve body.

[0009] Furthermore, the valve cover is flanged to the valve body via multiple first bolts, and an anti-loosening gasket is pressed between the first bolts and the valve cover.

[0010] Furthermore, the bottom of the valve cover has an upwardly recessed first mounting groove, the reverse sealing bearing and the stepped structure are both disposed in the first mounting groove, the ball valve with anti-vibration design includes a first bearing, the first bearing is located in the first mounting groove, and the first bearing is disposed between the stepped structure and the valve cover.

[0011] Furthermore, the top of the valve ball extends into the first mounting groove, and the ball valve with anti-vibration design also includes a second bearing, which is located in the first mounting groove and is disposed between the top of the valve ball and the valve cover.

[0012] Furthermore, the valve body has a second mounting groove, the bottom of the valve ball extends into the second mounting groove, and the ball valve with anti-vibration design also includes a third bearing, the third bearing is located in the second mounting groove, and the third bearing is disposed between the bottom of the valve ball and the valve body.

[0013] Furthermore, a gasket is provided between the bottom of the valve ball and the bottom of the second mounting groove.

[0014] Furthermore, the ball valve with anti-vibration design also includes a valve stem packing and a packing gland. The valve stem packing is pressed between the outer surface of the valve stem and the valve cover. The packing gland is connected to the top of the valve cover, and the bottom of the packing gland is pressed against the top of the valve stem packing.

[0015] Furthermore, the packing gland is connected to the valve cover by a plurality of second bolts, and a disc spring is pressed between the second bolts and the valve cover.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model discloses a ball valve with anti-vibration design. A leaf spring is pressed between the valve seat and the valve body. The elastic force of the leaf spring effectively compensates for minor deformations caused by vibration between the valve body and the pipeline, ensuring a tight fit between the valve ball and the valve seat and effectively preventing instantaneous loss of seal. Furthermore, the leaf spring itself absorbs and attenuates some of the vibration energy transmitted to internal parts, thus protecting precision sealing surfaces from impact damage. Simultaneously, a reverse-seal bearing is installed between the stepped structure and the valve cover. The reverse-seal bearing and the stepped structure ensure that the valve stem will not be blown out of the valve body by the medium pressure, effectively preventing catastrophic accidents. It also provides stable support for the valve stem, greatly reducing swaying caused by vibration, making operation smooth, and significantly improving the safety and stability of the ball valve with anti-vibration design. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of the ball valve with anti-vibration design according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] Valve body 1

[0021] Valve cover 2

[0022] Valve ball 3

[0023] Valve stem 4

[0024] Step structure 41

[0025] Reverse seal bearing 5

[0026] Valve seat 6

[0027] Leaf Spring 7

[0028] Support ring component 8

[0029] First support ring 81

[0030] Second support ring 82

[0031] Sealing packing 83

[0032] O-ring 84

[0033] Dustproof packing 85

[0034] First bolt 9

[0035] 10 anti-loosening gaskets

[0036] First bearing 11

[0037] Second bearing 12

[0038] Third bearing 13

[0039] Gasket 14

[0040] Valve stem packing 15

[0041] 16 packing gland

[0042] Second bolt 17

[0043] Disc Spring 18 Detailed Implementation

[0044] The following description of the embodiments is with reference to the accompanying drawings, which illustrate specific embodiments in which the present invention can be implemented.

[0045] like Figure 1As shown, this embodiment discloses a ball valve with anti-vibration design. The ball valve includes a valve body 1, a valve cover 2, a valve ball 3, a valve stem 4, a reverse sealing bearing 5, two valve seats 6, and two leaf springs 7. The valve cover 2 is connected to the top of the valve body 1, forming a valve cavity between the valve body 1 and the valve cover 2. The valve ball 3, the reverse sealing bearing 5, the two valve seats 6, and the two leaf springs 7 are all located within the valve cavity. The two valve seats 6 are respectively fitted against both sides of the valve ball 3, and the two leaf springs 7 are respectively pressed between the two valve seats 6 and the valve body 1. The leaf springs 7 provide continuous elastic force, effectively compensating for minor deformations caused by vibration between the valve body 1 and the pipeline, ensuring that the valve ball 3 and the valve seats 6 are always tightly fitted, effectively preventing instantaneous loss of seal and achieving elastic pre-tightening. Simultaneously, the leaf springs 7 themselves can absorb and attenuate some of the vibration energy transmitted to the internal parts, thereby protecting the precision sealing surface from impact damage, achieving buffer energy absorption, and greatly improving the safety and stability of the ball valve with anti-vibration design.

[0046] The valve stem 4 is rotatably mounted on the valve cover 2 and is connected to the top of the valve ball 3, causing the valve ball 3 to rotate. The outer circumferential surface of the valve stem 4 has an outwardly protruding stepped structure 41, which is located between the valve cover 2 and the valve ball 3. A reverse sealing bearing 5 is sleeved on the valve stem 4 and positioned between the stepped structure 41 and the valve cover 2. By rotating the valve stem 4 and causing the valve ball 3 to rotate within the valve cavity, the ball valve with anti-vibration design can be opened and closed. The reverse sealing bearing 5, positioned between the stepped structure 41 and the valve cover 2, ensures that the valve stem 4 will not be blown out of the valve body 1 by the medium pressure, effectively preventing catastrophic accidents. It also provides stable support for the valve stem 4, greatly reducing the swaying caused by vibration, making the operation smooth, and significantly improving the safety and stability of the ball valve with anti-vibration design. The anti-vibration ball valve of this embodiment can ensure reliable operation even when subjected to multidimensional vibration and pipeline stress. In particular, the anti-vibration ball valve can maintain structural integrity and sealing reliability under extreme conditions such as severe vibration and pipeline deformation. It is suitable for fields with extremely high safety requirements, such as nuclear power plants, petrochemical plants, and long-distance pipelines.

[0047] In this embodiment, a support ring component 8 is provided between each of the two valve seats 6 and the two leaf springs 7. The support ring component 8 includes a first support ring 81, a second support ring 82, and a sealing packing 83. The opposite sides of the first support ring 81 and the second support ring 82 respectively abut against the valve seats 6 and the leaf springs 7. The sealing packing 83 is disposed between the first support ring 81 and the second support ring 82. The two support ring components 8 cooperate with the two leaf springs 7 respectively, ensuring that the two valve seats 6 are tightly pressed against both sides of the valve ball 3, thus effectively preventing leakage. Simultaneously, the support ring component 8, including the first support ring 81, the second support ring 82, and the sealing packing 83, abuts against the valve seats 6 and the leaf springs 7 via the first support ring 81 and the second support ring 82, resulting in higher stability. The sealing packing 83, disposed between the first support ring 81 and the second support ring 82, achieves a seal, further effectively preventing leakage.

[0048] An O-ring 84 is pressed between the first support ring 81 and the valve seat 6. The O-ring 84 strengthens the seal, thereby effectively enhancing the sealing effect between the first support ring 81 and the valve seat 6 and further preventing leakage.

[0049] The second support ring 82 extends along the inner wall of the valve body 1, and a dustproof packing 85 is pressed between the second support ring 82 and the inner wall of the valve body 1. By pressing the dustproof packing 85 between the second support ring 82 and the inner wall of the valve body 1, the dustproof packing 85 plays a protective sealing role, thereby effectively preventing dust and impurities from entering between the second support ring 82 and the inner wall of the valve body 1, further enhancing the sealing effect.

[0050] In this embodiment, the valve cover 2 is connected to the valve body 1 via a flange through multiple first bolts 9, and an anti-loosening gasket 10 is pressed between the first bolts 9 and the valve cover 2. The valve cover 2 and the valve body 1 are interconnected through a central flange and multiple first bolts 9, thus forming a robust and rigid integral structure, making its overall rigidity and bending resistance far superior to that of a split (two-piece) valve body. When an earthquake causes pipeline twisting or stretching, this design can effectively resist deformation and prevent jamming or leakage caused by deformation of the valve body 1. At the same time, the anti-loosening gasket 10 is pressed between the first bolts 9 and the valve cover 2, using the anti-loosening gasket 10 to lock the first bolts 9 of the valve body 1 and the valve cover 2, effectively preventing the first bolts 9 from loosening, ensuring the integrity of the valve stem 4 seal and the valve cover 2 seal, and fundamentally eliminating external leakage caused by fastener failure.

[0051] The bottom of the valve cover 2 has an upwardly recessed first mounting groove. The inverted sealing bearing 5 and the stepped structure 41 are both located within this first mounting groove. The ball valve with anti-vibration design includes a first bearing 11, which is situated within the first mounting groove and positioned between the stepped structure 41 and the valve cover 2. By placing both the inverted sealing bearing 5 and the stepped structure 41 within the first mounting groove, installation is convenient and stability is high. Simultaneously, the first bearing 11 provides stable, full-circumferential support for the valve stem 4, significantly reducing vibration-induced swaying and ensuring smooth operation of the valve stem 4.

[0052] The top of the valve ball 3 extends into the first mounting groove. The ball valve with anti-vibration design also includes a second bearing 12, which is located in the first mounting groove and positioned between the top of the valve ball 3 and the valve cover 2. The second bearing 12 provides full-circumferential stable support for the top of the valve ball 3, greatly reducing the sway caused by vibration and making the valve ball 3 rotate smoothly.

[0053] The valve body 1 has a second mounting groove, into which the bottom of the valve ball 3 extends. The ball valve with anti-vibration design also includes a third bearing 13, which is located within the second mounting groove and positioned between the bottom of the valve ball 3 and the valve body 1. The third bearing 13 provides circumferential stable support for the bottom of the valve ball 3, greatly reducing the sway caused by vibration and ensuring smooth rotation of the valve ball 3.

[0054] A gasket 14 is provided between the bottom of the valve ball 3 and the bottom of the second mounting groove. By placing the gasket 14 between the bottom of the valve ball 3 and the valve body 1, frictional contact between the bottom of the valve ball 3 and the valve body 1 is effectively avoided, thus ensuring smooth rotation of the valve ball 3.

[0055] The ball valve with anti-vibration design also includes a stem packing 15 and a packing gland 16. The stem packing 15 is pressed between the outer surface of the valve stem 4 and the valve cover 2. The packing gland 16 is connected to the top of the valve cover 2, and the bottom of the packing gland 16 is pressed against the top of the stem packing 15. The stem packing 15 provides a sealing function, effectively preventing external leakage of the ball valve with anti-vibration design when conveying media. At the same time, the packing gland 16 is connected to the top of the valve cover 2 and presses against the stem packing 15, further enhancing the sealing effect by tightening the stem packing 15 with the packing gland 16.

[0056] In this embodiment, under extreme circumstances, if the bolts of the packing gland 16 at the valve stem packing 15 loosen, the inverted sealing bearing 5 and the stepped structure 41 inside the valve stem 4 will ensure that the valve stem 4 will not be blown out of the valve body 1 by the medium pressure, thus preventing catastrophic accidents.

[0057] The packing gland 16 is connected to the valve cover 2 by multiple second bolts 17, and a disc spring 18 is pressed between the second bolts 17 and the valve cover 2. The multiple second bolts 17 ensure high stability of the connection between the packing gland 16 and the valve cover 2. The disc spring 18 effectively prevents the second bolts 17 from loosening, ensuring the integrity of the valve stem 4 seal and the valve cover 2 seal, fundamentally eliminating external leakage caused by fastener failure.

[0058] In emergency situations (such as after an earthquake), regardless of whether power is lost, multiple bearings allow operators to manually open and close the valve relatively easily. The valve ball 3 and valve seat 6 are made of metal, and the valve stem packing 15 is made of graphite. The metal-to-metal sealing pair (valve seat 6 and valve ball 3) and graphite packing generally meet fire-resistant design standards and can maintain a seal even in secondary disasters such as fires.

[0059] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A ball valve with anti-vibration design, characterized in that, It includes a valve body, a valve cover, a valve ball, a valve stem, a reverse sealing bearing, two valve seats, and two leaf springs. The valve cover is connected to the top of the valve body, and a valve cavity is formed between the valve body and the valve cover. The valve ball, the reverse sealing bearing, the two valve seats, and the two leaf springs are all located within the valve cavity. The two valve seats are respectively fitted against both sides of the valve ball. The two leaf springs are respectively pressed between the two valve seats and the valve body. The valve stem is rotatably inserted through the valve cover and is connected to the top of the valve ball, driving the valve ball to rotate. The outer circumferential surface of the valve stem has an outwardly protruding stepped structure, which is located between the valve cover and the valve ball. The reverse sealing bearing is sleeved on the valve stem and is disposed between the stepped structure and the valve cover.

2. The ball valve with anti-vibration design as described in claim 1, characterized in that, A support ring component is provided between each of the two valve seats and the two leaf springs. The support ring component includes a first support ring, a second support ring, and a sealing packing. The opposite sides of the first support ring and the second support ring respectively abut against the valve seat and the leaf spring, and the sealing packing is disposed between the first support ring and the second support ring.

3. The ball valve with anti-vibration design as described in claim 2, characterized in that, An O-ring is pressed between the first support ring and the valve seat; And / or, the second support ring extends along the inner wall surface of the valve body, and a dustproof packing is pressed between the second support ring and the inner wall surface of the valve body.

4. The ball valve with anti-vibration design as described in claim 1, characterized in that, The valve cover is connected to the valve body via a flange by a plurality of first bolts, and an anti-loosening gasket is pressed between the first bolts and the valve cover.

5. The ball valve with anti-vibration design as described in claim 1, characterized in that, The bottom of the valve cover has an upwardly recessed first mounting groove. The inverted sealing bearing and the stepped structure are both disposed in the first mounting groove. The ball valve with anti-vibration design includes a first bearing, which is located in the first mounting groove and is disposed between the stepped structure and the valve cover.

6. The ball valve with anti-vibration design as described in claim 5, characterized in that, The top of the valve ball extends into the first mounting groove. The ball valve with anti-vibration design also includes a second bearing, which is located in the first mounting groove and is disposed between the top of the valve ball and the valve cover.

7. The ball valve with anti-vibration design as described in claim 1, characterized in that, The valve body has a second mounting groove, and the bottom of the valve ball extends into the second mounting groove. The ball valve with anti-vibration design also includes a third bearing, which is located in the second mounting groove and is disposed between the bottom of the valve ball and the valve body.

8. The ball valve with anti-vibration design as described in claim 7, characterized in that, A gasket is provided between the bottom of the valve ball and the bottom of the second mounting groove.

9. The ball valve with anti-vibration design as described in claim 1, characterized in that, The ball valve with anti-vibration design also includes a valve stem packing and a packing gland. The valve stem packing is pressed between the outer surface of the valve stem and the valve cover. The packing gland is connected to the top of the valve cover, and the bottom of the packing gland is pressed against the top of the valve stem packing.

10. The ball valve with anti-vibration design as described in claim 9, characterized in that, The packing gland is connected to the valve cover by a plurality of second bolts, and a disc spring is pressed between the second bolts and the valve cover.

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