CN218031733U - Valve rod bellows sealing device - Google Patents
Valve rod bellows sealing device Download PDFInfo
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- CN218031733U CN218031733U CN202222132085.1U CN202222132085U CN218031733U CN 218031733 U CN218031733 U CN 218031733U CN 202222132085 U CN202222132085 U CN 202222132085U CN 218031733 U CN218031733 U CN 218031733U
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- valve rod
- valve
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- corrugated pipe
- upper plate
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Abstract
The utility model relates to the technical field of valve structure, concretely relates to valve rod bellows sealing device, which comprises a valve body, the valve gap, valve rod and installation component, the valve rod includes one-level valve rod and second grade valve rod, the installation component includes the one-level bellows, first upper plate, first hypoplastron and second grade sealing member, the outside at the one-level valve rod is established to the one-level bellows cover, one side and the one-level bellows fixed connection of first upper plate, the opposite side and the valve gap of first upper plate are dismantled and are connected, one side and the one-level bellows fixed connection of first hypoplastron, the opposite side and the one-level valve rod of first hypoplastron are dismantled and are connected, second grade sealing member is located the outside of second grade valve rod. Two-stage seal structure has effectively promoted its sealing reliability to realize dismantling of one-level bellows through first upper plate and first lower plate and connect, can dismantle the change, avoid causing unnecessary extravagant.
Description
Technical Field
The utility model relates to a valve structure technical field especially relates to a valve rod bellows sealing device.
Background
The corrugated pipe is adopted for valve rod sealing and is superior to various packing sliding seals, zero leakage of media can be realized by the corrugated pipe depending on self expansion and contraction, but the metal corrugated pipe also has the conditions of corrosion fracture and fatigue fracture or has emergencies (overpressure, overtemperature and the like), the corrugated pipe can lose efficacy and leak, and the situation that the media leakage is not timely prevented and danger is caused is avoided.
The existing double-bellows valve rod sealing structure comprises a valve body, a valve cover screwed at the upper end of the valve body and a valve rod positioned in the valve body, wherein the valve rod comprises a primary valve rod and a secondary valve rod which are matched with each other and are respectively connected with the valve body in a sliding manner; the outer sides of the first-stage valve rod and the second-stage valve rod are respectively provided with a first-stage sealing corrugated pipe and a second-stage sealing corrugated pipe, the lower end of the first-stage sealing corrugated pipe is welded with the lower part of the first-stage valve rod, the upper end of the first-stage sealing corrugated pipe is welded with the shell of the valve body, the lower end of the second-stage sealing corrugated pipe is welded with a welding fixing edge arranged at the lower part of the second-stage valve rod, and the upper end of the second-stage sealing corrugated pipe is welded with the shell of the valve body; the valve rod is respectively provided with the limiting table, and the valve body is internally provided with two-stage sealing structures, so that the sealing reliability of the valve body is effectively improved.
However, in the dual bellows valve rod sealing structure, the primary sealing bellows and the secondary sealing bellows are welded and fixed, the valve body, the bellows and the valve rod are welded into a whole, although the sealing performance is good, the three parts are connected into a whole, and after one part is damaged, the three parts are replaced completely, so that unnecessary waste is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a valve rod bellows sealing device has solved above-mentioned double bellows valve rod seal structure, and one-level sealing bellows and second grade sealing bellows all adopt the welded fastening mode, are a whole with valve body, bellows and valve rod welding, though sealing performance is good, but connect three part as a whole, and one of them part damages the back and just all changes three part, causes the extravagant problem of unnecessary.
In order to achieve the purpose, the utility model provides a valve, valve gap and valve rod, the valve gap with the valve body dismantles to be connected, and is located the top of valve, the valve rod is located the inside of valve, the valve rod includes first-order valve rod and second grade valve rod, the first-order valve rod with the second grade valve rod is connected, the second grade valve rod is located the below of first-order valve rod, still include the installation component;
the mounting assembly comprises a first-stage corrugated pipe, a first upper plate, a first lower plate and a second-stage sealing member, the first-stage corrugated pipe is sleeved on the outer side of the first-stage valve rod, one side of the first upper plate is fixedly connected with the first-stage corrugated pipe, the other side of the first upper plate is detachably connected with the valve cover, one side of the first lower plate is fixedly connected with the first-stage corrugated pipe, the other side of the first lower plate is detachably connected with the first-stage valve rod, and the second-stage sealing member is located on the outer side of the second-stage valve rod.
The secondary sealing component comprises a secondary corrugated pipe and a second upper plate, and the secondary corrugated pipe is sleeved on the outer side of the secondary valve rod; the second upper plate is fixedly connected with the secondary corrugated pipe, is detachably connected with the valve body and is positioned below the primary corrugated pipe.
The secondary sealing component further comprises a second lower plate, and the second lower plate is fixedly connected with the secondary corrugated pipe and detachably connected with the secondary valve rod.
Wherein, the installation component still includes first gasket, first gasket is located between first upper plate and the valve gap.
Wherein the mounting assembly further comprises a second gasket located between the second upper plate and the valve body.
The valve rod corrugated pipe sealing device further comprises an auxiliary assembly, and the auxiliary assembly is located on one side, close to the primary valve rod, of the valve cover.
The auxiliary assembly comprises a sealing ring and a gland, and the sealing ring is positioned on one side, close to the valve cover, of the primary valve rod; the gland is located the upper end of sealing washer.
The utility model discloses a valve rod bellows sealing device, the one-level valve rod with the second grade valve rod passes through T type spout cooperation and connects, makes up into the valve rod, and respectively with valve body sliding connection, be located the inside of valve body, valve gap connection is in the top of valve body, first bellows cover is established the outside of one-level valve rod to both ends weld respectively first upper plate with first hypoplastron, first upper plate with the connection is dismantled to the valve gap, first hypoplastron with the connection is dismantled to the bulge of one-level valve rod lower extreme one-level valve rod department realizes that the one-level is sealed, the second grade sealing member is in second grade valve rod department realizes that the second grade is sealed, and two-stage seal structure has effectively promoted its sealing reliability, and passes through first upper plate with first hypoplastron is realized the connection can be dismantled of one-level bellows, can dismantle the change, avoids causing the unnecessary extravagant.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a cross-sectional view of a valve stem bellows seal according to a first embodiment of the present invention.
Fig. 2 is a cross-sectional view of a valve stem bellows seal of a second embodiment of the present invention.
In the figure: 101-valve body, 102-valve cover, 103-primary valve rod, 104-secondary valve rod, 105-primary bellows, 106-first upper plate, 107-first lower plate, 108-secondary bellows, 109-second upper plate, 110-second lower plate, 111-first gasket, 112-second gasket, 201-sealing ring, 202-gland.
Detailed Description
The embodiments of the invention will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings, and the embodiments described hereinafter with reference to the drawings are exemplary and intended to be illustrative of the invention and should not be construed as limiting the invention.
The first embodiment of the present application is:
referring to fig. 1, in which fig. 1 is a sectional view of a valve stem bellows seal device according to a first embodiment of the present invention. The utility model provides a valve rod bellows sealing device: comprising a valve body 101, a bonnet 102, a valve stem comprising a primary valve stem 103 and a secondary valve stem 104, and a mounting assembly comprising a primary bellows 105, a first upper plate 106, a first lower plate 107, a secondary sealing member comprising a secondary bellows 108, a second upper plate 109 and a second lower plate 110, a first gasket 111 and a second gasket 112,
for the present embodiment, the bonnet 102 is detachably connected to the valve body 101 and is located above the valve body 101, the valve rod is located inside the valve body 101, the valve rod includes a primary valve rod 103 and a secondary valve rod 104, the primary valve rod 103 is connected to the secondary valve rod 104, and the secondary valve rod 104 is located below the primary valve rod 103. The valve bonnet 102 is connected to the upper end face of the valve body 101 through screws, the first-stage valve rod 103 is connected to the second-stage valve rod 104 through a T-shaped sliding groove in a matched mode, a T-shaped sliding head is arranged on the upper portion of the second-stage valve rod 104, a T-shaped sliding groove is formed in the lower portion of the first-stage valve rod 103 and perpendicular to the axis direction, the first-stage valve rod 103 and the second-stage valve rod are connected in a sliding mode, the two are connected to the inside of the valve body 101 in a sliding mode, and the second-stage valve rod 104 is located below the first-stage valve rod 103.
Wherein, the one-level bellows 105 cover is established the outside of one-level valve rod 103, one side of first upper plate 106 with one-level bellows 105 fixed connection, the opposite side of first upper plate 106 with valve gap 102 is dismantled and is connected, one side of first lower plate 107 with one-level bellows 105 fixed connection, the opposite side of first lower plate 107 with one-level valve rod 103 is dismantled and is connected, the second grade sealing member is located the outside of second grade valve rod 104. The one-level bellows 105 cover is established the outside of one-level valve rod 103 is located the inboard of valve body 101, and the upper end welding has first upper plate 106, and the lower extreme welding has first lower plate 107, first upper plate 106 passes through the screw connection and is in the lower terminal surface of valve gap 102, first lower plate 107 passes through the screw connection and is in the protruding portion department of one-level valve rod 103 lower extreme one-level valve rod 103 department realizes sealed, the second grade sealing member is in second grade valve rod 104 department realizes sealed.
Secondly, the secondary bellows 108 is sleeved outside the secondary valve rod 104; the second upper plate 109 is fixedly connected to the secondary bellows 108, detachably connected to the valve body 101, and located below the primary bellows 105. The second lower plate 110 is fixedly connected to the secondary bellows 108 and detachably connected to the secondary valve stem 104. The secondary corrugated pipe 108 is sleeved on the outer side of the secondary valve rod 104, the second upper plate 109 is welded to the upper end of the secondary corrugated pipe, the second lower plate 110 is welded to the lower end of the secondary corrugated pipe, the second upper plate 109 is connected to the valve body 101 through screws, the second lower plate 110 is connected to the lower end of the secondary valve rod 104 through screws, and sealing is achieved at the position of the secondary valve rod 104.
Meanwhile, the first gasket 111 is located between the first upper plate 106 and the bonnet 102. The second gasket 112 is located between the second upper plate 109 and the valve body 101. The first gasket 111 and the second gasket 112 are both rubber flat gaskets or polytetrafluoroethylene-coated gaskets or asbestos rubber gaskets, and are respectively located between the first upper plate 106 and the valve cover 102, and between the second upper plate 109 and the valve body 101, through holes matched with screws are formed for the screws to pass through, so that a sealing barrier is added for sealing between the corrugated pipe and the valve rod and between the valve cover 102.
When the valve rod corrugated pipe sealing device of the embodiment is used, the first corrugated pipe is sleeved on the outer side of the first-stage valve rod 103, the second corrugated pipe is sleeved on the outer side of the second-stage valve rod 104, the two-stage sealing structure effectively improves the sealing reliability of the valve rod, the first upper plate 106 and the first lower plate 107 are welded at the two ends of the first corrugated pipe, the first upper plate 106 and the first lower plate 107 are respectively connected with the valve cover 102 and the first-stage valve rod 103 through screws, the first gasket 111 is arranged between the valve cover 102 and the first upper plate 106 to enhance the sealing performance, the second upper plate 109 and the second lower plate 110 are welded at the two ends of the second corrugated pipe, the second upper plate 109 and the second lower plate 110 are connected with the valve body 101 and the second-stage valve rod 104 through screws, the second gasket 112 is arranged between the valve cover 102 and the second upper plate 109 to enhance the sealing performance, the screws can also be bolts and nuts, the first corrugated pipe, the second corrugated pipe, the valve body 101, the valve cover 102, the valve rod and the valve rod can be replaced conveniently, and the whole set of the screws and the nuts can be replaced, and the parts are damaged, and the parts are not damaged independently.
The second embodiment of the present application is:
on the basis of the first embodiment, please refer to fig. 2, wherein fig. 2 is a cross-sectional view of a valve stem bellows sealing device according to a second embodiment of the present invention. The valve stem bellows sealing device of the present embodiment further includes an auxiliary assembly, which includes a sealing ring 201 and a gland 202.
For this embodiment, the auxiliary assembly enhances sealing.
Wherein, the sealing ring 201 is positioned on one side of the primary valve rod 103 close to the valve cover 102; the gland 202 is located at the upper end of the sealing ring 201. The number of the sealing rings 201 is multiple, the sealing rings are respectively located between the valve cover 102 and the first-stage valve rod 103 and used for the sliding of the first-stage valve rod 103, the gland 202 is connected with the valve cover 102 through bolts and located at the top of the sealing rings 201, and the sealing rings 201 are installed and limited in the valve cover 102.
When the valve rod corrugated pipe sealing device of the embodiment is used, the sealing ring 201 is arranged between the valve cover 102 and the primary valve rod 103 through the gland 202, and in case of a special situation that the corrugated pipe is broken, the sealing ring 201 can be used as an emergency standby for sealing, so that the sealing performance of the structure is enhanced, and the use is safer.
While the above disclosure describes one or more preferred embodiments of the present invention, it is not intended to limit the scope of the claims to such embodiments, and one skilled in the art will understand that all or a portion of the processes performed in the above embodiments may be practiced without departing from the spirit and scope of the claims.
Claims (7)
1. A valve rod corrugated pipe sealing device comprises a valve body, a valve cover and a valve rod, wherein the valve cover is detachably connected with the valve body and is positioned above the valve body, the valve rod is positioned in the valve body, the valve rod comprises a first-stage valve rod and a second-stage valve rod, the first-stage valve rod is connected with the second-stage valve rod, the second-stage valve rod is positioned below the first-stage valve rod,
the device also comprises a mounting component;
the mounting assembly comprises a first-stage corrugated pipe, a first upper plate, a first lower plate and a second-stage sealing member, the first-stage corrugated pipe is sleeved on the outer side of the first-stage valve rod, one side of the first upper plate is fixedly connected with the first-stage corrugated pipe, the other side of the first upper plate is detachably connected with the valve cover, one side of the first lower plate is fixedly connected with the first-stage corrugated pipe, the other side of the first lower plate is detachably connected with the first-stage valve rod, and the second-stage sealing member is located on the outer side of the second-stage valve rod.
2. The valve stem bellows seal of claim 1,
the secondary sealing component comprises a secondary corrugated pipe and a second upper plate, and the secondary corrugated pipe is sleeved on the outer side of the secondary valve rod; the second upper plate is fixedly connected with the secondary corrugated pipe, is detachably connected with the valve body and is positioned below the primary corrugated pipe.
3. The valve stem bellows seal of claim 2,
the secondary sealing member further comprises a second lower plate, and the second lower plate is fixedly connected with the secondary corrugated pipe and detachably connected with the secondary valve rod.
4. The valve stem bellows seal of claim 1,
the mounting assembly further includes a first gasket located between the first upper plate and the bonnet.
5. The valve stem bellows seal of claim 2,
the mounting assembly further includes a second gasket positioned between the second upper plate and the valve body.
6. The valve stem bellows seal of claim 1,
the valve rod corrugated pipe sealing device further comprises an auxiliary assembly, and the auxiliary assembly is located on one side, close to the first-stage valve rod, of the valve cover.
7. The valve stem bellows seal of claim 6,
the auxiliary assembly comprises a sealing ring and a gland, and the sealing ring is positioned on one side of the primary valve rod, which is close to the valve cover; the gland is located at the upper end of the sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222132085.1U CN218031733U (en) | 2022-08-12 | 2022-08-12 | Valve rod bellows sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222132085.1U CN218031733U (en) | 2022-08-12 | 2022-08-12 | Valve rod bellows sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218031733U true CN218031733U (en) | 2022-12-13 |
Family
ID=84347732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222132085.1U Active CN218031733U (en) | 2022-08-12 | 2022-08-12 | Valve rod bellows sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218031733U (en) |
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2022
- 2022-08-12 CN CN202222132085.1U patent/CN218031733U/en active Active
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