CN211288738U - Inner and outer cylinder temperature measuring point sealing device - Google Patents
Inner and outer cylinder temperature measuring point sealing device Download PDFInfo
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- CN211288738U CN211288738U CN202020030236.0U CN202020030236U CN211288738U CN 211288738 U CN211288738 U CN 211288738U CN 202020030236 U CN202020030236 U CN 202020030236U CN 211288738 U CN211288738 U CN 211288738U
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- outer cylinder
- thermocouple channel
- graphite ring
- pressing block
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Abstract
The utility model discloses an inner and outer cylinder temperature measuring point sealing device, which comprises a flange, a sealing sleeve, a tooth-shaped pad, a pressing block and a graphite ring; the outer cylinder is provided with a sealing port; a tooth-shaped pad is arranged between the sealing surface of the sealing sleeve and the sealing surface of the outer cylinder; a thermocouple channel I, a graphite ring placing groove and a pressing block placing groove are arranged in the sealing sleeve; the center of the pressing block and the center of the graphite ring are respectively provided with a second thermocouple channel and a third thermocouple channel; the graphite ring is placed in the graphite ring placing groove; a thermocouple channel III in the center of the graphite ring is communicated with the thermocouple channel I; the pressing block is placed in the pressing block placing groove, and a thermocouple channel II in the center of the pressing block is communicated with a thermocouple channel III; a thermocouple channel IV is arranged in the center of the flange; the thermocouple channel IV is communicated with the thermocouple channel II; the flange is connected with the outer cylinder through a bolt, and the sealing sleeve is pressed on the outer cylinder; a thermometer sleeve is arranged on the inner cylinder; a tooth-shaped pad is arranged between the sealing surface of the thermometer sleeve and the inner cylinder. The utility model discloses need not worry because the influence that the inside and outside jar thermal expansion is inhomogeneous to bring.
Description
Technical Field
The utility model relates to a sealing device, concretely relates to interior outer jar temperature measurement station sealing device.
Background
The existing sealing device for the temperature measuring points of the inner cylinder and the outer cylinder is shown in figure 1 and comprises a flange 01, a sealing screw 02, a tooth-shaped gasket 03, a threaded pipe 04, a thermometer sleeve 05, a tooth-shaped gasket 06, an outer cylinder 07 and an inner cylinder 08; the inner measuring point joint, the threaded pipe and the sealing nut are in threaded connection, tooth-shaped gaskets are added between the sealing surface of the thermometer sleeve and the inner cylinder, between the sealing surface of the sealing nut and the outer cylinder and between the threaded pipe and the sealing surface of the thermometer sleeve, and finally the sealing nut is pressed by the flange through the connecting bolt. The thermocouple measuring rod is finally propped against the bottom of the inner opening of the thermometer sleeve through a sealing nut and a threaded pipe, and the outer end of the thermocouple measuring rod is fixed on the flange through a thread with a clamping sleeve. Because the sealing nut, the threaded pipe and the thermometer sleeve are in threaded connection, an independent space isolated from a steam medium between an inner cylinder and an outer cylinder is created, and tooth-shaped gaskets are added between the thermometer sleeve and the inner cylinder, between the threaded pipe and the thermometer sleeve and between the sealing nut and the outer cylinder, the whole independent space only has leakage of connecting threads between the sealing nut and the threaded pipe, and the leakage amount is quite small. The outer end of the flange is provided with a thread for installing the thermocouple, and a secondary seal is formed between the clamping sleeve carried by the thermocouple and the flange. Thus, the front and the back seals stop the gas leakage at the inner side of the threaded pipe.
The existing sealing device has the problems that:
1. the straight thread itself does not have a sealing effect, and leakage between the gland nut and the threaded pipe cannot be ignored.
2. 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, a crack is generated at the thread position when the threaded pipe is stretched, the tooth-shaped pads fail due to the uneven stress of the two tooth-shaped pads, the original sealing effect can be damaged by the two results, and finally the leakage of a measuring point is caused.
3. When the structure of the machine is designed, the inner cylinder and the outer cylinder need to be expanded freely, and the relative expansion between the inner cylinder and the outer cylinder is limited by the addition of the threaded pipe, so that the through flow of the machine set is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an inside and outside jar temperature measurement station sealing device, need not worry because the influence that the inside and outside jar heat expansion is inhomogeneous brings.
In order to solve the technical problem, the utility model discloses take following technical scheme: a sealing device for temperature measuring points of an inner cylinder and an outer cylinder comprises a flange, a sealing sleeve, a tooth-shaped pad, a pressing block and a graphite ring; the outer cylinder is provided with a sealing port; the sealing sleeve is of a T-shaped structure and comprises a first sealing part arranged in the sealing opening and a second sealing part arranged behind the sealing part; the diameter of the first sealing part is smaller than that of the second sealing part; a tooth-shaped pad is arranged between the sealing surface of the sealing sleeve and the sealing surface of the outer cylinder;
a thermocouple channel I, a graphite ring placing groove and a pressing block placing groove are arranged in the sealing sleeve; the center of the pressing block and the center of the graphite ring are respectively provided with a second thermocouple channel and a third thermocouple channel; the graphite ring is placed in the graphite ring placing groove; a thermocouple channel III in the center of the graphite ring is communicated with the thermocouple channel I; the pressing block is placed in the pressing block placing groove and located on the outer side of the graphite ring, and a thermocouple channel II in the center of the pressing block is communicated with a thermocouple channel III;
a thermocouple channel IV is arranged in the center of the flange; the thermocouple channel IV is communicated with the thermocouple channel II; the flange is connected with the outer cylinder through bolts, and the sealing sleeve is pressed on the outer cylinder; the second sealing part of the sealing sleeve is positioned between the flange and the outer cylinder;
a thermometer sleeve is arranged on the inner cylinder; and a tooth-shaped pad is arranged between the thermometer sleeve and the sealing surface of the inner cylinder.
Furthermore, the outer cylinder is provided with a positioning groove for placing the tooth-shaped pad at the sealing opening.
Furthermore, 5-8 graphite rings are placed in the graphite ring placing groove.
The utility model has the advantages that:
1. the actual measuring point of the thermocouple is only the tail end sensor part, and the rest part is exposed in the working medium, so that the actual use of the thermocouple is not influenced. The actual detection result is not influenced. The metal shell at the outer end of the cylinder can be bent, and the influence caused by uneven thermal expansion of the inner cylinder and the outer cylinder is avoided.
2. Compared with the original threaded structure, the graphite ring can realize zero leakage on the basis of calculating the correct pressure expansion amount.
3. 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.
4. 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.
5. Because the connecting rod is cancelled, the whole device is not limited to change with the clearance between the inner cylinder and the outer cylinder of the unit, and the universality is high.
6. The threads of the outer flange are retained, and two seals are still achieved.
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 view of a conventional sealing device.
Fig. 2 is a schematic structural diagram of the sealing device of the present invention.
Fig. 3 is an enlarged view of I 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 temperature measuring 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 pressing block 4 and a graphite ring 5; the outer cylinder 6 is provided with a sealing port 61; the sealing sleeve 2 is of a T-shaped structure and comprises a first sealing part arranged in the sealing opening 61 and a second sealing part arranged behind the sealing part; the diameter of the first sealing part is smaller than that of the second sealing part; the outer cylinder 6 is provided with a positioning groove for placing the tooth-shaped pad 3 at the sealing port 61. A tooth-shaped pad 3 is arranged between the sealing surfaces of the sealing sleeve 2 and the outer cylinder 6, and the tooth-shaped pad 3 is positioned in the positioning groove.
A thermocouple channel I21, a graphite ring placing groove 22 and a pressing block placing groove 23 are arranged in the sealing sleeve 2; the centers of the pressing block 4 and the graphite ring 5 are respectively provided with a thermocouple channel II 41 and a thermocouple channel III 51; the graphite ring 5 is placed in the graphite ring placing groove 22; 5-8 graphite rings 5 are placed in the graphite ring placing groove 22. A third thermocouple channel 51 in the center of the graphite ring is communicated with the first thermocouple channel 21; the pressing block 4 is placed in the pressing block placing groove 23 and is positioned on the outer side of the graphite ring 5, and a thermocouple channel II 41 in the center of the pressing block 4 is communicated with a thermocouple channel III 51;
a thermocouple channel IV 11 is arranged in the center of the flange 1; the fourth thermocouple channel 11 is communicated with the second thermocouple channel 41; the flange is connected with the outer cylinder 6 through bolts, and the sealing sleeve 2 is pressed on the outer cylinder 6; the second sealing part of the sealing sleeve 2 is positioned between the flange 1 and the outer cylinder 6;
the inner cylinder 7 is provided with a thermometer sleeve 8; and a tooth-shaped pad 3 is arranged between the sealing surfaces of the thermometer sleeve 8 and the inner cylinder 7.
The sealing sleeve is pressed to be dead against the outer cylinder by the flange, a tooth-shaped pad is added between the sealing surface of the sealing sleeve and the outer cylinder, a graphite ring is filled in the center of the sealing sleeve, and finally, the sealing sleeve is pressed to be dead by a pressing block. The thermocouple penetrates through the flange and the graphite ring, and finally the tail end of the thermocouple is propped against the bottom of the opening in the thermometer sleeve.
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 (3)
1. The utility model provides an inside and outside jar temperature measurement station sealing device which characterized in that: comprises a flange (1), a sealing sleeve (2), a tooth-shaped pad (3), a pressing block (4) and a graphite ring (5); the outer cylinder (6) is provided with a sealing port (61); the sealing sleeve (2) is of a T-shaped structure and comprises a first sealing part arranged in the sealing opening (61) and a second sealing part arranged behind the sealing part; the diameter of the first sealing part is smaller than that of the second sealing part; a tooth-shaped pad (3) is arranged between the sealing surface of the sealing sleeve and the sealing surface of the outer cylinder;
a thermocouple channel I (21), a graphite ring placing groove (22) and a pressing block placing groove (23) are arranged in the sealing sleeve (2); the centers of the pressing block (4) and the graphite ring (5) are respectively provided with a thermocouple channel II (41) and a thermocouple channel III (51); the graphite ring (5) is placed in the graphite ring placing groove (22); a thermocouple channel III (51) in the center of the graphite ring is communicated with the thermocouple channel I (21); the pressing block (4) is placed in the pressing block placing groove (23) and is positioned on the outer side of the graphite ring (5), and a thermocouple channel II (41) in the center of the pressing block (4) is communicated with a thermocouple channel III (51);
a thermocouple channel IV (11) is arranged in the center of the flange (1); the thermocouple channel IV (11) is communicated with the thermocouple channel II (41); the flange is connected with the outer cylinder (6) through bolts, and the sealing sleeve (2) is pressed on the outer cylinder (6); the second sealing part of the sealing sleeve (2) is positioned between the flange (1) and the outer cylinder (6);
a thermometer sleeve (8) is arranged on the inner cylinder (7); a tooth-shaped pad (3) is arranged between the thermometer sleeve (8) and the sealing surface of the inner cylinder (7).
2. The internal and external cylinder temperature measurement point sealing device of claim 1, wherein: the outer cylinder (6) is provided with a positioning groove for placing the tooth-shaped pad (3) at the sealing opening (61).
3. The internal and external cylinder temperature measurement point sealing device of claim 1, wherein: 5-8 graphite rings (5) are placed in the graphite ring placing groove (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020030236.0U CN211288738U (en) | 2020-01-08 | 2020-01-08 | Inner and outer cylinder temperature measuring point sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020030236.0U CN211288738U (en) | 2020-01-08 | 2020-01-08 | Inner and outer cylinder temperature measuring point sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211288738U true CN211288738U (en) | 2020-08-18 |
Family
ID=72012471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020030236.0U Active CN211288738U (en) | 2020-01-08 | 2020-01-08 | Inner and outer cylinder temperature measuring point sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211288738U (en) |
-
2020
- 2020-01-08 CN CN202020030236.0U patent/CN211288738U/en active Active
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