CN217539651U - Ultra-low temperature butterfly valve sealed firmly - Google Patents
Ultra-low temperature butterfly valve sealed firmly Download PDFInfo
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- CN217539651U CN217539651U CN202122631118.2U CN202122631118U CN217539651U CN 217539651 U CN217539651 U CN 217539651U CN 202122631118 U CN202122631118 U CN 202122631118U CN 217539651 U CN217539651 U CN 217539651U
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- butterfly plate
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- butterfly
- ring
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Abstract
The utility model discloses an ultra-low temperature butterfly valve sealed firmly relates to butterfly valve technical field, include: valve body, valve rod, butterfly plate, sealing washer clamping ring, seal gasket. The sealing ring pressing ring is arranged in the step column of the butterfly plate, the sealing ring is tightly pressed on the side of the butterfly plate through the sealing ring pressing ring, and the sealing gasket arranged between the sealing ring and the butterfly plate is protruded on the butterfly plate or the sealing ring, so that a trace gap is formed between the sealing ring and the butterfly plate. Therefore, the sealing gasket plays a role in sealing and supporting, a gap is reserved between the sealing ring and the butterfly plate, so that the sealing ring can slide and contract slightly, the sealing ring has good self-adaptive capacity at normal temperature and low temperature, the sealing specific pressure is uniform, the sealing performance is reliable, and the sealing performance of the sealing ring can be maintained well after repeated normal temperature and ultralow temperature circulation.
Description
Technical Field
The utility model relates to a butterfly valve technical field, in particular to ultra-low temperature butterfly valve sealed firmly.
Background
With the development of localization of LNG (liquefied natural gas) storage and transportation equipment, the demand of a low-temperature butterfly valve on an LNG storage and transportation pipeline is higher and higher.
The sealing form of the traditional hard sealing butterfly valve mostly adopts a traditional three-eccentric sealing structure, and the sealing structure adopts different metal materials and corresponding surface treatment processes according to different applicable media, so that the application range is provided for the butterfly valve. However, due to the limitation of the materials used for structural features, when or after repeated cycles at normal temperature and low temperature, the position of the parts can be easily changed due to different shrinkage coefficients of the materials, and the sealing surface can be damaged or failed, so that leakage can occur.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is solved among the prior art butterfly valve after normal atmospheric temperature and low temperature manifold cycles, can lead to the part position to take place to change because of the material coefficient of contraction is different, causes the damage or the inefficacy of sealed face, takes place the problem of leaking.
In order to achieve the above purpose, the utility model adopts the following technical proposal: an ultra-low temperature hard seal butterfly valve, comprising: valve body, valve rod, butterfly plate, sealing washer clamping ring, seal gasket.
The butterfly valve is characterized in that a cavity is formed in the valve body, the valve rod and the butterfly plate are arranged in the cavity of the valve body, the valve rod penetrates through the butterfly plate, and the valve rod is connected with the butterfly plate.
One side of the butterfly plate is provided with a step column (the step column and the butterfly plate are of an integrated structure and are steps for installation), and the sealing ring is sleeved in the step column. The seal ring pressing ring is arranged in the step column of the butterfly plate, the density ring pressing ring is connected with the butterfly plate through a fastener (such as a screw), the seal ring is positioned between the butterfly plate and the seal ring pressing ring, and the seal ring is pressed on the side of the butterfly plate through the seal ring pressing ring.
The sealing gasket is arranged between the sealing ring and the butterfly plate, the density gasket is protruded from the butterfly plate or the sealing ring, and a gap is formed between the sealing ring and the butterfly plate.
There is (trace) clearance between the face of sealing washer and butterfly plate, and seal gasket plays sealed effect promptly, also plays the supporting role, leaves the clearance between sealing washer and the butterfly plate and is convenient for trace slip shrink, and the sealing washer all has good self-adaptation ability under normal atmospheric temperature and the low temperature, and sealed specific pressure is even, and sealing performance is reliable.
Further, in the embodiment of the utility model, install the disk seat in the cavity of valve body, the disk seat side is equipped with the disk seat clamping ring, be furnished with on the disk seat clamping ring and compress tightly the regulating part, compress tightly the regulating part with the cooperation of disk seat clamping ring, the disk seat with leave fitting space between the disk seat clamping ring. The valve seat can be pre-tightened and adjusted by pressing the adjusting piece, so that the sealing force of the sealing ring between the valve seat and the butterfly plate is adjusted, and the sealing effect of the sealing ring is ensured.
Furthermore, in the embodiment of the present invention, the valve seat pressing ring is fixed and limited in the cavity of the valve body.
Furthermore, in the embodiment of the present invention, a gap is designed between the valve seat and the valve body, so that the valve seat is not affected by the uneven shrinkage of the valve body when the valve seat undergoes dimensional shrinkage at low temperature.
Further, in the embodiment of the present invention, the inner diameter of the sealing ring is larger than the step post of the butterfly plate, so that the sealing ring made of different materials and the butterfly plate do not affect each other when contracting. When the valve seat is overhauled or assembled, the valve seat can be matched with the sealing ring to be automatically adjusted in a small range, the sealing position is reliable, and the valve seat has self-adaptive capacity. Further, can produce the space when the hole of sealing washer is greater than the step post, the sealing washer can carry out eccentric adjustment, can match the disk seat, easy dismounting, especially during the assembly before the sealing washer clamping ring presss from both sides tightly completely, the sealing washer leans on the eccentric adjustment cooperation of proper motion on the disk seat, can reach best sealed position, reduces and leaks the emergence probability, is pressed from both sides tightly by the sealing washer clamping ring at last again.
Further, in an embodiment of the present invention, the sealing gasket is embedded in the groove of the butterfly plate, so that the sealing gasket protrudes from the butterfly plate.
Further, in the embodiment of the present invention, the butterfly plate and the valve rod are connected to each other by the flat key and the taper pin, the contraction coefficient of the flat key is greater than that of the butterfly plate, so that at low temperature, the flat key and the butterfly plate do not affect each other by contraction and sliding, and therefore the taper pin is fixed after the butterfly plate and the valve rod are opposite, the butterfly plate can be in the correct sealing position.
Further, in the embodiment of the utility model provides an, the valve rod bottom is equipped with the stopper, stopper upper end both sides are equipped with the antifriction pad.
Furthermore, in the embodiment of the present invention, the friction reducing pad is formed by combining stainless steel and friction-resistant elastic non-metallic material. The limiting block and the friction reducing pad can reduce friction, compensate partial size difference caused by different low-temperature contraction coefficients of the valve rod and the valve body and ensure the correct sealing position of the butterfly plate.
Further, in the embodiment of the present invention, a communicating opening is provided on one side of the valve body, the cavity of the valve body and the external opening are provided, and the access cover plate is installed at the opening. The butterfly valve sealing structure adopts a three-eccentric sealing structure, wherein the valve seat and the sealing ring are independent metal components, and the maintenance cover plate can be opened to facilitate the online maintenance and replacement of users.
The utility model has the advantages that:
the utility model discloses with the configuration of sealing washer clamping ring in the step post of butterfly plate, the sealing washer compresses tightly in the butterfly plate side through the sealing washer clamping ring, and installs the protruding in butterfly plate or sealing washer of seal gasket between sealing washer and butterfly plate, makes between sealing washer and the butterfly plate go and forms micro-clearance. Therefore, the sealing gasket plays a role in sealing and supporting, a gap is reserved between the sealing ring and the butterfly plate, so that the sealing ring can slide and contract slightly, the sealing ring has good self-adaptive capacity at normal temperature and low temperature, the sealing specific pressure is uniform, the sealing performance is reliable, and the sealing performance of the sealing ring can be maintained well after repeated normal temperature and ultralow temperature circulation.
Drawings
Fig. 1 is the utility model discloses ultra-low temperature butterfly valve sealed firmly's schematic structure view.
Fig. 2 is an enlarged schematic view of the structure of the first part of the embodiment of the present invention.
Fig. 3 is an enlarged schematic view of part ii of the structure according to the embodiment of the present invention.
In the attached drawings
1. Maintenance cover plate 2, valve rod 3 and valve body
4. Butterfly plate 5, flat key 6 and taper pin
7. Rand 8, disk seat clamping ring 9, disk seat
10. Sealing washer 11, seal gasket 12, sealing washer clamping ring
13. Bolt 14, friction reducing pad 15 and limiting block
Detailed Description
In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some, but not all, embodiments of the present invention and are not to be considered as limiting, and that all other embodiments can be made by one of ordinary skill in the art without any inventive work.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known ultra-low temperature hard sealing methods and structures have not been described in detail to avoid unnecessarily obscuring the embodiments. In addition, all embodiments may be used in combination with each other.
The first embodiment is as follows:
an ultra-low temperature hard seal butterfly valve, as shown in fig. 1 and 2, comprises: the valve comprises a valve body 3, a valve rod 2, a butterfly plate 4, a sealing ring 10, a sealing ring pressing ring 12 and a sealing gasket 11.
As shown in fig. 1, a cavity is formed in the valve body 3, the valve rod 2 and the butterfly plate 4 are arranged in the cavity of the valve body 3, the valve rod 2 penetrates through the butterfly plate 4, and the valve rod 2 is connected with the butterfly plate 4.
As shown in fig. 2, the butterfly plate 4 has a stepped column (the stepped column and the butterfly plate 4 are of an integral structure and are steps for installation), and the seal ring 10 is fitted in the stepped column. The seal ring pressing ring 12 is arranged in a step column of the butterfly plate 4, the density ring pressing ring is connected with the butterfly plate 4 through a fastener (such as a screw), the seal ring 10 is located between the butterfly plate 4 and the seal ring pressing ring 12, and the seal ring 10 is pressed on the butterfly plate 4 side through the seal ring pressing ring 12.
The sealing gasket 11 is arranged between the sealing ring 10 and the butterfly plate 4, the density gasket is protruded from the butterfly plate 4 or the sealing ring 10, and a gap is formed between the sealing ring 10 and the butterfly plate 4.
There is (trace) clearance between the face of sealing washer 10 and butterfly plate 4, and seal gasket 11 plays sealed effect promptly, also plays the supporting role, leaves the clearance between sealing washer 10 and the butterfly plate 4 and is convenient for trace slip shrink, and sealing washer 10 all has good self-adaptation ability under normal atmospheric temperature and the low temperature, and sealed specific pressure is even, and sealing performance is reliable.
The utility model discloses dispose sealing washer clamping ring 12 in the step post of butterfly plate 4, sealing washer 10 compresses tightly in the butterfly plate 4 side through sealing washer clamping ring 12, and installs seal gasket 11 between sealing washer 10 and butterfly plate 4 and bulge in butterfly plate 4 or sealing washer 10, makes to go between sealing washer 10 and the butterfly plate 4 and forms micro-clearance. Therefore, the sealing gasket 11 plays a role in sealing and supporting, a gap is reserved between the sealing ring 10 and the butterfly plate 4, so that the sealing ring 10 has good self-adaptive capacity at normal temperature and low temperature, the sealing specific pressure is uniform, the sealing performance is reliable, and the sealing performance of the sealing ring 10 can still be maintained well after repeated normal-temperature and ultralow-temperature circulation.
As shown in fig. 2, a valve seat 9 is installed in the cavity of the valve body 3, a valve seat pressing ring 8 is arranged on the side of the valve seat 9, a pressing adjusting part is arranged on the valve seat pressing ring 8, the pressing adjusting part is matched with the valve seat 9 pressing ring, and a matching space is reserved between the valve seat 9 and the valve seat pressing ring 8. Through compressing tightly the regulating part can carry out pretension regulation to disk seat 9, realize adjusting the sealing force of sealing washer 10 between disk seat 9 and the butterfly plate 4, ensure the sealed effect of sealing washer 10.
As shown in fig. 2, the valve seat pressing ring 8 is fixed and limited in the cavity of the valve body 3 in cooperation with the collar 7. Fix spacing through rand 7 and need not to adjust repeatedly, be convenient for install fast and sealed.
A gap is designed between the valve seat 9 and the valve body 3, so that the valve seat 9 is not affected by the uneven shrinkage of the valve body 3 when the size shrinkage occurs at low temperature.
As shown in fig. 2, the inner diameter of the sealing ring 10 is larger than the stepped column of the butterfly plate 4, so that the sealing ring 10 and the butterfly plate 4 made of different materials do not affect each other when being contracted. And when the valve seat 9 is overhauled or assembled, the valve seat can be automatically adjusted in a small range by matching with the sealing ring 10, the sealing position is reliable, and the valve seat has self-adaptive capacity. Further, can produce the space when the hole of sealing washer 10 is greater than the step post, sealing washer 10 can carry out eccentric adjustment, can match disk seat 9, easy dismounting, especially during the assembly before sealing washer clamping ring 12 presss from both sides tightly completely, and sealing washer 10 leans on the eccentric adjustment cooperation of proper motion on disk seat 9, can reach best sealing position, reduces and leaks the probability of taking place, is pressed from both sides tightly by sealing washer clamping ring 12 at last again.
The sealing gasket 11 is fitted in the groove of the butterfly plate 4 so that the sealing gasket 11 protrudes from the butterfly plate 4.
As shown in fig. 1, the butterfly plate 4 and the valve stem 2 are connected with each other by means of the flat key 5 and the taper pin 6, and the linear contraction coefficient of the flat key 5 is greater than that of the butterfly plate 4, so that the flat key 5 and the butterfly plate 4 do not affect each other in contraction and sliding at low temperature, and therefore the butterfly plate 4 can be in a correct sealing position after the taper pin 6 fixes the relative position of the butterfly plate 4 and the valve stem 2.
As shown in figure 3, the bottom of the valve rod 2 is provided with a limiting block 15, the limiting block 15 is fixed at the bottom of the valve rod 2 through a bolt 13, and two sides of the upper end of the limiting block 15 are provided with friction reducing pads 14. The friction reducing pad 14 is made of a composite of stainless steel and a friction resistant resilient non-metallic material. The limiting block 15 and the friction reducing pad 14 can reduce friction, and can also compensate partial size difference caused by different low-temperature contraction coefficients of the valve rod 2 and the valve body 3, so that the correct sealing position of the butterfly plate 4 is ensured.
As shown in fig. 1, an opening communicating the cavity of the valve body 3 with the outside is formed on one side of the valve body 3, and an access cover plate 1 is installed at the opening. The butterfly valve sealing structure adopts a three-eccentric sealing structure, wherein the valve seat 9 and the sealing ring 10 are independent metal components, and the maintenance and replacement of the butterfly valve sealing structure can be facilitated for users in an on-line manner by opening the maintenance cover plate 1.
Although the invention has been described with respect to illustrative embodiments thereof so that those skilled in the art can understand the invention, it is to be understood that the invention is not limited to the disclosed embodiments, but rather, is intended to cover all modifications and variations within the spirit and scope of the invention as defined and defined by the appended claims.
Claims (9)
1. An ultra-low temperature hard seal butterfly valve, comprising:
the valve body, set up in the valve body:
a cavity;
a valve stem disposed in a cavity of the valve body;
the butterfly plate, the butterfly plate sets up in the cavity of valve body, the valve rod runs through the butterfly plate, the valve rod with the butterfly plate links to each other, butterfly plate one side has:
a step post;
the sealing ring is sleeved in the step column;
the sealing ring pressing ring is arranged in the step column of the butterfly plate, the sealing ring pressing ring is connected with the butterfly plate through a fastener, the sealing ring is positioned between the butterfly plate and the sealing ring pressing ring, and the sealing ring is tightly pressed on the side of the butterfly plate through the sealing ring pressing ring;
the sealing gasket is arranged between the sealing ring and the butterfly plate, the sealing gasket is protruded from the butterfly plate or the sealing ring, and a gap is formed between the sealing ring and the butterfly plate.
2. The ultra-low temperature hard seal butterfly valve of claim 1, wherein a valve seat is installed in the cavity of the valve body, a valve seat pressing ring is arranged on the side of the valve seat, a pressing adjusting piece is matched on the valve seat pressing ring, the pressing adjusting piece is matched with the valve seat pressing ring, and a matching space is reserved between the valve seat and the valve seat pressing ring.
3. The ultra-low temperature hard seal butterfly valve of claim 2, wherein the seat press ring and the retainer ring are fixed and limited in the cavity of the valve body.
4. The ultra-low temperature hard seal butterfly valve of claim 2, wherein a gap is designed between the valve seat and the valve body such that the valve seat does not experience uneven contraction of the valve body when dimensional contraction occurs at low temperatures.
5. The ultra-low temperature hard seal butterfly valve of claim 1, wherein the inner diameter of the sealing ring is larger than the stepped post of the butterfly plate, so that the sealing ring and the butterfly plate made of different materials do not affect each other when they are contracted.
6. The ultra-low temperature hard seal butterfly valve of claim 1, wherein the sealing gasket is fitted in a groove of the butterfly plate such that the sealing gasket protrudes from the butterfly plate.
7. The ultra-low temperature hard seal butterfly valve of claim 1, wherein the butterfly plate and the valve stem are connected to each other by a flat key and a taper pin, and the flat key has a linear contraction coefficient larger than that of the butterfly plate, so that the flat key and the butterfly plate do not interfere with each other in contraction and sliding at low temperature, and thus the butterfly plate can be in a correct sealing position after the taper pin fixes the relative positions of the butterfly plate and the valve stem.
8. The ultra-low temperature hard seal butterfly valve of claim 1, wherein the bottom of the valve rod is provided with a limiting block, and friction reducing pads are arranged on two sides of the upper end of the limiting block.
9. The ultra-low temperature hard seal butterfly valve of claim 1, wherein an opening for communicating the cavity of the valve body with the outside is opened on one side of the valve body, and an access cover plate is installed on the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122631118.2U CN217539651U (en) | 2021-10-30 | 2021-10-30 | Ultra-low temperature butterfly valve sealed firmly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122631118.2U CN217539651U (en) | 2021-10-30 | 2021-10-30 | Ultra-low temperature butterfly valve sealed firmly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217539651U true CN217539651U (en) | 2022-10-04 |
Family
ID=83417505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122631118.2U Active CN217539651U (en) | 2021-10-30 | 2021-10-30 | Ultra-low temperature butterfly valve sealed firmly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217539651U (en) |
-
2021
- 2021-10-30 CN CN202122631118.2U patent/CN217539651U/en active Active
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