CN211288732U - Inner and outer cylinder pressure measuring point sealing device - Google Patents
Inner and outer cylinder pressure measuring point sealing device Download PDFInfo
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- CN211288732U CN211288732U CN202020030208.9U CN202020030208U CN211288732U CN 211288732 U CN211288732 U CN 211288732U CN 202020030208 U CN202020030208 U CN 202020030208U CN 211288732 U CN211288732 U CN 211288732U
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Abstract
The utility model discloses an inner and outer cylinder pressure measuring point sealing device, which comprises a flange, a sealing sleeve, a tooth-shaped pad, a screwed pipe, a positioning ring, an outer sealing ring II and an inner sealing ring; the center of the sealing sleeve is provided with a through hole and a sealing hole; the through hole is communicated with the sealing hole, and a labyrinth sealing assembly is arranged in the sealing hole; the labyrinth seal assembly comprises a positioning ring, an outer seal ring II and an inner seal ring; the outer sealing ring II seals the sealing surface of the inner wall of the sealing hole; the inner sealing ring seals the sealing surface of the side wall of the threaded pipe and the sealing surface above the through hole; the positioning ring is in threaded connection with the threaded pipe, and the outer sealing ring II and the inner sealing ring are tightly pressed; the top end of the threaded pipe is arranged on the inner cylinder; a positioning convex ring is arranged on the threaded pipe, a tooth-shaped pad is arranged between the positioning convex ring and the sealing surface of the inner cylinder, and the tail end of the threaded pipe sequentially passes through a through hole on the sealing sleeve to be connected with the labyrinth sealing assembly; a steam channel is arranged in the threaded pipe. The utility model discloses the inefficacy that the inequality of profile of tooth pad atress is early become leaks vapour can not appear.
Description
Technical Field
The utility model relates to a sealing device, concretely relates to interior outer cylinder pressure measurement station sealing device.
Background
The existing sealing device for the pressure measuring points of the inner cylinder and the outer cylinder comprises a tooth-shaped gasket I01, a threaded pipe 02, a flange 03, a sealing nut 05 and a tooth-shaped gasket II 05. The installation mode is as follows: the inner cylinder, the threaded pipe and the sealing nut are in threaded connection, tooth-shaped gaskets are added between the threaded pipe and the sealing surface of the inner cylinder and between the sealing nut and the sealing surface of the outer cylinder, and finally the sealing nut is pressed by the flange through the connecting bolt. Finally, a pipeline is welded on the outer side of the flange to lead the steam to the pressure gauge. Because the sealing nut, the threaded pipe and the inner cylinder are in threaded connection, an independent space isolated from a steam medium of an interlayer of the inner cylinder and the outer cylinder is created, and the tooth-shaped gaskets are added between the threaded pipe and the inner cylinder and between the sealing nut and the outer cylinder, the leakage of the connecting thread between the sealing nut and the threaded pipe only exists in the whole independent space, and the leakage amount is quite small and leaks to the interlayer of the inner cylinder and the outer cylinder, so that the measuring result is not influenced. The connecting pipes between the outer end of the flange and the pressure gauge are welded.
The existing sealing device for the pressure measuring points of the inner cylinder and the outer cylinder has the following problems:
since this connection is a hard connection, the threaded pipe itself is subjected to a great tension in order to ensure the sealing effect of the seals. The heating effect of the steam to the inner cylinder and the outer cylinder is different in the starting process, and the thermal expansion between the inner cylinder and the outer cylinder is different. The threaded pipe can generate pulling deformation under the condition that the thermal expansion of the inner cylinder and the outer cylinder is inconsistent, two results can be generated, the condition that the threaded pipe is stretched to generate cracks at the thread part and the condition that the two-tooth-shaped gasket is unevenly stressed to only seal a local area can be generated, the original sealing effect can be damaged by the two results, and finally large-scale leakage is caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an interior outer cylinder pressure measurement station sealing device, the inefficacy that the profile of tooth pad atress inequality becomes earlier can not appear leaking vapour.
In order to solve the technical problem, the utility model discloses take following technical scheme: a sealing device for pressure measuring points of an inner cylinder and an outer cylinder comprises a flange, a sealing sleeve, a tooth-shaped pad, a threaded pipe, a positioning ring, an outer sealing ring II and an inner sealing ring;
the outer cylinder is provided with a sealing port; the sealing sleeve seals the sealing port; the flange is connected with the outer cylinder through a bolt, and the sealing sleeve is tightly pressed on the outer cylinder; a tooth-shaped pad is arranged between the sealing surface of the sealing sleeve and the sealing surface of the outer cylinder;
the center of the sealing sleeve is provided with a through hole and a sealing hole; the through hole is communicated with the sealing hole, and a labyrinth sealing assembly is arranged in the sealing hole; the labyrinth seal assembly comprises a positioning ring, an outer seal ring II and an inner seal ring; the outer sealing ring II seals the sealing surface of the inner wall of the sealing hole; the inner sealing ring seals the sealing surface of the side wall of the threaded pipe and the sealing surface above the through hole; the positioning ring is in threaded connection with the threaded pipe, and the outer sealing ring II and the inner sealing ring are tightly pressed;
the top end of the threaded pipe is arranged on the inner cylinder; a positioning convex ring is arranged on the threaded pipe, a tooth-shaped pad is arranged between the positioning convex ring and the sealing surface of the inner cylinder, and the tail end of the threaded pipe sequentially passes through a through hole on the sealing sleeve to be connected with the labyrinth sealing assembly; a steam channel is arranged in the threaded pipe.
Further, the flange compresses the labyrinth seal assembly in the seal sleeve through a disc spring.
Furthermore, an outer sealing ring I is arranged between the disc spring and the outer sealing ring II.
Furthermore, a plurality of outer sealing rings II and inner sealing rings are arranged in the sealing sleeve; the outer sealing ring II and the inner sealing ring are arranged alternately.
Furthermore, the sealing sleeve comprises a first sealing part positioned in the sealing hole and a second sealing part arranged between the flange and the outer cylinder.
The utility model has the advantages that:
1. the inner sealing ring is matched with the threaded pipe, and the outer sealing ring is matched with the outer cylinder, so that the threaded pipe can move relative to the outer cylinder along with the sliding of the inner and outer sealing rings, the original hard connection is replaced, and the deformation and the crack of the threaded pipe can not occur due to the bending moment.
2. Because the hard connection of the inner cylinder and the outer cylinder is cancelled, the requirements on processing and centering of the connection part between the inner cylinder and the outer cylinder are reduced, and basically no requirement is made.
3. When the steam turbine unit is overhauled, the whole device is simple, the number of hard connecting positions is small, excessive adhesion cannot exist, the disassembly is convenient, the damage is not easy, and the device can be repeatedly used.
4. Because of adopting movable structure, whole device within a certain range not restricted and the change of the clearance between the unit internal and external jar, the commonality is high.
5. The whole structure ensures that the tooth-shaped cushion is evenly stressed in the running process of the steam turbine, and the failure steam leakage which is early caused by uneven stress of the tooth-shaped cushion can not occur.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional internal and external cylinder pressure measuring point sealing device.
Fig. 2 is a schematic structural view of the sealing device for pressure measuring points of inner and outer cylinders of the present invention.
Fig. 3 is an enlarged view of ii in fig. 2.
Detailed Description
The technical solution of the present invention will be described clearly and completely through the following detailed description.
As shown in fig. 2-3, the sealing device for the pressure measurement points of the inner and outer cylinders of the present invention comprises a flange 1, a sealing sleeve 2, a tooth-shaped pad 3, a threaded pipe 4, a positioning ring 8, an outer sealing ring two 9, and an inner sealing ring 10; the outer cylinder 11 is provided with a sealing port 12; the sealing sleeve 2 seals the sealing port; the flange 1 is connected with an outer cylinder 11 through bolts, and the sealing sleeve 2 is pressed on the outer cylinder 11; a tooth-shaped pad 3 is arranged between the sealing surfaces of the sealing sleeve 2 and the outer cylinder 11; the utility model discloses the seal cover is including the sealing that is located the sealed downthehole one and set up the sealing two between flange and outer jar.
The center of the sealing sleeve 2 is provided with a through hole 21 and a sealing hole 22; the through hole is communicated with the sealing hole 22, and a labyrinth sealing assembly is arranged in the sealing hole; the labyrinth seal assembly comprises a positioning ring 8, an outer sealing ring II 9 and an inner sealing ring 10; the outer sealing ring II 9 seals the sealing surface of the inner wall of the sealing hole 22; the inner sealing ring 10 seals the sealing surface of the side wall of the threaded pipe 4 and the sealing surface above the through hole 21; the positioning ring 8 is in threaded connection with the threaded pipe 4 to tightly press the outer sealing ring II 9 and the inner sealing ring 10; the labyrinth seal assembly is tightly pressed in the seal sleeve 2 by the flange 1 through a disc spring 6, and an outer sealing ring I7 is further arranged between the disc spring 6 and an outer sealing ring II 9.
The sealing sleeve 2 of the utility model is internally provided with a plurality of outer sealing rings II 9 and inner sealing rings 10; the outer sealing ring II 9 and the inner sealing ring 10 are arranged in a spaced mode.
The top end of the threaded pipe 4 is arranged on the inner cylinder 13; a positioning convex ring is arranged on the threaded pipe 4, a tooth-shaped pad 3 is arranged between the positioning convex ring and the sealing surface of the inner cylinder 13, and the tail end of the threaded pipe 4 sequentially passes through a through hole on a sealing sleeve to be connected with a labyrinth sealing component; a steam channel is arranged in the threaded pipe 4.
The utility model discloses an installation: the sealing sleeve is pressed to be dead against the outer cylinder by the flange, a tooth-shaped gasket is added between the sealing surface of the sealing sleeve and the outer cylinder, the labyrinth seal is formed by the inner sealing ring and the outer sealing ring in the center of the sealing sleeve, and finally the sealing sleeve is pressed to be dead by a disc spring. After the threaded pipe is arranged on the inner cylinder, the tail end of the threaded pipe penetrates through the inner sealing ring and the outer sealing ring.
The above-mentioned embodiments are only described as the preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention, and the technical content of the present invention, which is claimed by the present invention, is fully recorded in the technical claims.
Claims (5)
1. Inside and outside jar pressure measurement point sealing device, its characterized in that: comprises a flange (1), a sealing sleeve (2), a tooth-shaped pad (3), a threaded pipe (4), a positioning ring (8), an outer sealing ring II (9) and an inner sealing ring (10); the outer cylinder (11) is provided with a sealing port (12); the sealing sleeve (2) seals the sealing port; the flange (1) is connected with the outer cylinder (11) through bolts, and the sealing sleeve (2) is pressed on the outer cylinder (11); a tooth-shaped pad (3) is arranged between the sealing surface of the sealing sleeve (2) and the sealing surface of the outer cylinder (11);
the center of the sealing sleeve (2) is provided with a through hole (21) and a sealing hole (22); the through hole is communicated with the sealing hole (22), and a labyrinth sealing assembly is arranged in the sealing hole; the labyrinth seal assembly comprises a positioning ring (8), an outer sealing ring II (9) and an inner sealing ring (10); the sealing surface of the inner wall of the sealing hole (22) is sealed by the outer sealing ring II (9); the inner sealing ring (10) seals a sealing surface on the side wall of the threaded pipe (4) and a sealing surface above the through hole (21); the positioning ring (8) is in threaded connection with the threaded pipe (4) to tightly press the outer sealing ring II (9) and the inner sealing ring (10);
the top end of the threaded pipe (4) is arranged on the inner cylinder (13); a positioning convex ring is arranged on the threaded pipe (4), a tooth-shaped gasket (3) is arranged between the positioning convex ring and the sealing surface of the inner cylinder (13), and the tail end of the threaded pipe (4) sequentially passes through a through hole on the sealing sleeve to be connected with the labyrinth sealing assembly; a steam channel is arranged in the threaded pipe (4).
2. The inner and outer cylinder pressure measuring point sealing device as claimed in claim 1, wherein: the labyrinth seal assembly is compressed tightly in the seal sleeve (2) by the flange (1) through the disc spring (6).
3. The inner and outer cylinder pressure measuring point sealing device as claimed in claim 2, wherein: and a first outer sealing ring (7) is also arranged between the disc spring (6) and the second outer sealing ring (9).
4. The inner and outer cylinder pressure measuring point sealing device as claimed in claim 1, wherein: a plurality of outer sealing ring II (9) and inner sealing rings (10) are arranged in the sealing sleeve (2); the outer sealing ring II (9) and the inner sealing ring (10) are arranged alternately.
5. The inner and outer cylinder pressure measuring point sealing device as claimed in claim 1, wherein: the sealing sleeve comprises a first sealing part positioned in the sealing hole and a second sealing part arranged between the flange and the outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020030208.9U CN211288732U (en) | 2020-01-08 | 2020-01-08 | Inner and outer cylinder pressure measuring point sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020030208.9U CN211288732U (en) | 2020-01-08 | 2020-01-08 | Inner and outer cylinder pressure measuring point sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211288732U true CN211288732U (en) | 2020-08-18 |
Family
ID=72012469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020030208.9U Active CN211288732U (en) | 2020-01-08 | 2020-01-08 | Inner and outer cylinder pressure measuring point sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211288732U (en) |
-
2020
- 2020-01-08 CN CN202020030208.9U patent/CN211288732U/en active Active
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