CN211320896U - Oil leakage prevention sealing device for vibration probe of steam turbine of nuclear power plant - Google Patents
Oil leakage prevention sealing device for vibration probe of steam turbine of nuclear power plant Download PDFInfo
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- CN211320896U CN211320896U CN201922350572.3U CN201922350572U CN211320896U CN 211320896 U CN211320896 U CN 211320896U CN 201922350572 U CN201922350572 U CN 201922350572U CN 211320896 U CN211320896 U CN 211320896U
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Abstract
The utility model belongs to the technical field of mechanical device is sealed, concretely relates to leak protection oil sealing device for nuclear power plant's steam turbine vibration probe passes through in the center round hole of following the joint nut of device, joint nut sealing member, threaded connection head sealing bush, threaded connection head, sealed O type circle, metal-connected ring, sealed O type circle, threaded connection head sealing bush, joint nut sealing member, joint nut in proper order, and the probe body passes from the center round hole once from a left side to the right side according to above-mentioned order. The oil leakage problem of the nuclear power station steam turbine vibration probe is completely solved from the source, the joint of the armored cable and the probe body is completely sealed, no gap exists, lubricating oil mist cannot enter the armored cable, the sealing device has no influence on the quality of lubricating oil, and compared with the method generally adopted in the industry, the time is saved, and the maintenance cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of mechanical device seals, concretely relates to leak protection oil sealing device for nuclear power plant's steam turbine vibration probe.
Background
The steam turbine generator unit of the nuclear power station consists of a high and medium pressure cylinder with high and medium pressure steam inlet valves, a double-exhaust low pressure cylinder connected with the high and medium pressure cylinder and a generator. Each rotor is supported by two bearings, the turbine rotor and the generator rotor being connected by a rigid coupling to form an axis.
During the whole operation period of the steam turbine, rotor vibration parameters in the operation process of the steam turbine need to be monitored through a vibration probe so as to ensure the safe operation of the steam turbine generator unit.
Because the turbine rotor rotates at a high speed and high temperature steam forms high temperature inside the turbine, turbine lubricant oil is prone to forming oil mist during operation.
The steam turbine vibration measuring probe mounting position is located inside the steam turbine bearing box, and the probe cable part adopts the armor shell to protect, and the armor cable adopts the interlinkage screw thread formula with the probe body to be connected, and there is the gap junction, can't realize totally enclosed isolated oil mist, leads to inside the lubricated oil mist infiltration armor cable, and inside lubricating oil leaked to the junction box along the armor cable, there was serious conflagration hidden danger.
At present, for the problem of oil leakage of a turbine vibration probe in the nuclear power plant industry, a method of coating a sealant at the joint of a vibration probe body and an armored cable and then sealing by using a heat-shrinkable sleeve is generally adopted. The heat-shrinkable sleeve has poor sealing performance, can only relieve the oil leakage of the armored cable, still has the oil leakage problem, and has the risk of polluting the lubricating oil quality by using the sealing gum.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a leak protection oil sealing device for nuclear power plant's steam turbine vibration probe for the screw thread junction of armoured cable is sealed completely, does not have the gap, makes inside lubricating oil mist can't enter into the armoured cable, solves the oil leak problem of nuclear power station steam turbine vibration probe completely from the source, makes probe and armoured cable junction keep IP 65's sealed grade, can stop the oil seepage phenomenon, and the material adopts resistant oily material, does not have the influence to the lubricating oil quality.
The big problem of the installation laminating degree of difficulty of arc net piece and arc support is mainly solved to this scheme.
The utility model discloses a utility model content as follows:
an oil leakage prevention sealing device for a vibration probe of a steam turbine in a nuclear power plant is characterized in that a sealing device body is divided into parts, namely a joint nut, a joint nut sealing piece, a threaded joint sealing bush, a threaded joint, a sealing O-shaped ring and a metal connecting ring;
the joint nut is arranged at one end of the threaded joint, a joint nut sealing piece is arranged at the joint, and a threaded joint sealing bush is arranged on the periphery of the threaded joint;
the other end of the joint nut sealing piece is connected with the threaded connector, and a sealing O-shaped ring is arranged on the periphery of the threaded connector;
the other end of the threaded connector is provided with a metal connecting ring, and a sealing O-shaped ring is arranged between the threaded connector and the metal connecting ring.
The joint screw cap is made of an oil-resistant material, and has stable properties in a high-temperature and lubricating oil mist environment.
The front end of the connector nut is a round head, the rear end of the connector nut is in a hexagonal prism shape, the connector nut can be fastened through a wrench, the connector nut is provided with internal threads and is connected with a threaded connector in a combined mode, a reserved round hole is formed in the center of the connector nut, and the probe cable body can penetrate through the round hole.
The threaded connector is made of an oil-resistant material, and has stable properties in a high-temperature and lubricating oil mist environment.
The screw thread in threaded connection head both ends screw thread is the external screw, can carry out the built-up connection with joint nut and metal go-between, and hexagonal nut is taken at the threaded connection head middle part, uses general solid wrench and connects the nut cooperation to screw up, can evenly act on the foraminiferous threaded connection head sealing bush in center with power to compress tightly the probe cable, improved grease proofing sealing grade.
The middle of the threaded connector is hollow and can pass through an armored cable.
The sealing O-shaped ring is made of an oil-resistant material, has stable property at high temperature, and acts between the threaded connector and the metal connecting ring to play a sealing role.
The two ends of the metal connecting ring are provided with internal threads which play a role in connection and are used for connecting the upper half device and the lower half device; the sealing device can be divided into an upper half part and a lower half part by taking the metal connecting ring as a boundary, and the two parts are structurally symmetrical.
The head nut sealing element is assembled with the threaded connector and the threaded connector sealing bush in a combined mode, the two sealing elements are compressed by screwing the head nut and the threaded connector, the armored cable and the probe body are pressed tightly by the sealing elements, and the inside of the sealing device becomes a completely sealed environment.
The sealing device structure is split, so that the probe body sequentially passes through the central round hole of the device from the connector nut, the connector nut sealing piece, the threaded connector sealing bush, the threaded connector, the sealing O-shaped ring, the metal connecting ring, the sealing O-shaped ring, the threaded connector sealing bush, the connector nut sealing piece and the connector nut, and the probe body sequentially passes through the central round hole from left to right.
The utility model has the advantages as follows:
1) the problem of oil leakage of the nuclear power station steam turbine vibration probe is completely solved from the source, so that the joint of the armored cable and the probe body is completely sealed, no gap exists, and lubricating oil mist cannot enter the armored cable.
2) The sealing device has no influence on the quality of the lubricating oil.
3) Compared with the method generally adopted in the industry, the method saves time and maintenance cost.
Drawings
Fig. 1 is a schematic view of the installation of the sealing device of the present invention;
fig. 2 is a schematic structural view of the sealing device of the present invention.
In the figure: 1. the sealing structure comprises a sealing O-shaped ring, 2. a threaded connector, 3. a threaded connector sealing bush, 4. a connector nut sealing piece and 5. a connector nut.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
the utility model provides a leak protection oil sealing device for nuclear power plant's steam turbine vibration probe, the sealing device body divide into 6 parts and constitutes, as shown in figure 2, is respectively joint nut 5, joint nut sealing member 4, threaded connection head sealing bush 3, threaded connection head 2, sealed O type circle 1 and metal connecting ring.
The joint nut 5 is arranged at one end of the threaded joint 2, a joint nut sealing piece 4 is arranged at the joint, and a threaded joint sealing bush 3 is arranged on the periphery of the threaded joint 2;
the other end of the joint nut sealing element 4 is connected with the threaded connector 2, and a sealing O-shaped ring 1 is arranged on the periphery of the threaded connector 2;
the other end of the threaded connector 2 is provided with a metal connecting ring, and a sealing O-shaped ring 1 is arranged between the threaded connector and the metal connecting ring.
The connector nut 5 is made of oil-resistant materials, is stable in property under the environment of high temperature and lubricating oil mist, the front end of the connector nut 5 is a round head, the rear end of the connector nut 5 is in a hexagonal prism shape, an accessible wrench can be used for fastening, the connector nut 5 is provided with an internal thread and is in combined connection with the threaded connector 2, a reserved round hole is formed in the center of the connector nut 5, and the probe cable body can penetrate through the round hole.
Threaded connector 2 adopts resistant oily material, under high temperature, lubricated oil mist environment, the nature is stable, and its both ends line is the external screw, can carry out the built-up connection with joint nut 5 and metal go-between, and threaded connector 2 middle part area hexagon nut uses general solid wrench and connects nut 5 cooperation to screw up, can be with the even effect of power at the foraminiferous threaded connector seal bush 3 in center to compress tightly the probe cable, improved grease proofing sealing grade. The middle of the threaded connector 2 is hollow, and an armored cable can pass through.
The sealing O-shaped ring 1 is made of an oil-resistant material, has stable property at high temperature, and acts between the threaded connector 2 and the metal connecting ring to play a sealing role.
The two ends of the metal connecting ring are provided with internal threads which play a role in connection and are used for connecting the upper half device and the lower half device. The sealing device can be divided into an upper half part and a lower half part by taking the metal connecting ring as a boundary, and the two parts are structurally symmetrical.
The joint nut sealing element 4 is assembled with the threaded connector 2 and the threaded connector sealing bush 3 in a combined mode, the joint nut 5 and the threaded connector 2 are screwed to compress the two sealing elements, the armored cable and the probe body are pressed tightly by the sealing elements, and the inside of the sealing device becomes a completely sealed environment. At the moment, the connection part of the armored cable and the probe body is positioned in the sealing device and completely isolated from external oil mist, so that the oil leakage problem can be effectively solved.
The sealing device structure is split, so that the probe body sequentially passes through the central circular holes of the connector nut 5, the connector nut sealing piece 4, the threaded connector sealing bush 3, the threaded connector 2, the sealing O-shaped ring 1, the metal connecting ring, the sealing O-shaped ring 1, the threaded connector 2, the threaded connector sealing bush 3, the connector nut sealing piece 4 and the connector nut 5 of the device, and the probe body passes through the central circular hole once from left to right according to the sequence. (the probe body passes through the central circular hole in sequence in the order of figure 1);
2) fastening the connector of the threaded connector 2 close to the side of the probe body, wherein the fastening installation position is close to the connection position of the probe body and the armored cable;
3) connecting a joint nut 5 close to the side of the probe body with the threaded connector 2 at a connecting position which enables the connecting part of the probe body and the armored cable to be contained in the device, and then fastening the joint nut 5;
4) installing a sealing O-shaped ring 1 on a threaded connector 2;
5) connecting and fastening the threaded connector 2 with a metal connecting ring;
6) installing an O-shaped sealing ring close to the armored cable side on the threaded connector 2 close to the armored cable side;
7) connecting and fastening the threaded connector close to the side of the armored cable with the metal connecting ring;
8) fastening the connector 2 close to the armored cable side;
9) the joint nut 5 near the armored cable side is connected to the threaded joint 2 and then fastened.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.
Any modification, equivalent replacement, improvement, simplification and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An oil leakage prevention sealing device for a vibration probe of a steam turbine in a nuclear power plant is characterized in that a sealing device body is divided into parts, namely a joint nut, a joint nut sealing piece, a threaded joint sealing bush, a threaded joint, a sealing O-shaped ring and a metal connecting ring;
the method is characterized in that: the joint nut is arranged at one end of the threaded joint, a joint nut sealing piece is arranged at the joint, and a threaded joint sealing bush is arranged on the periphery of the threaded joint;
the other end of the joint nut sealing piece is connected with the threaded connector, and a sealing O-shaped ring is arranged on the periphery of the threaded connector;
the other end of the threaded connector is provided with a metal connecting ring, and a sealing O-shaped ring is arranged between the threaded connector and the metal connecting ring.
2. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 1, wherein: the joint screw cap is made of an oil-resistant material, and has stable properties in a high-temperature and lubricating oil mist environment.
3. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 2, wherein: the front end of the connector nut is a round head, the rear end of the connector nut is in a hexagonal prism shape, the connector nut can be fastened through a wrench, the connector nut is provided with internal threads and is connected with a threaded connector in a combined mode, a reserved round hole is formed in the center of the connector nut, and the probe cable body can penetrate through the round hole.
4. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 1, wherein: the threaded connector is made of an oil-resistant material, and has stable properties in a high-temperature and lubricating oil mist environment.
5. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 4, wherein: the screw thread in threaded connection head both ends screw thread is the external screw, can carry out the built-up connection with joint nut and metal go-between, and hexagonal nut is taken at the threaded connection head middle part, uses general solid wrench and connects the nut cooperation to screw up, can evenly act on the foraminiferous threaded connection head sealing bush in center with power to compress tightly the probe cable, improved grease proofing sealing grade.
6. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 4, wherein: the middle of the threaded connector is hollow and can pass through an armored cable.
7. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 1, wherein: the sealing O-shaped ring is made of an oil-resistant material, has stable property at high temperature, and acts between the threaded connector and the metal connecting ring to play a sealing role.
8. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 1, wherein: the two ends of the metal connecting ring are provided with internal threads which play a role in connection and are used for connecting the upper half device and the lower half device; the sealing device can be divided into an upper half part and a lower half part by taking the metal connecting ring as a boundary, and the two parts are structurally symmetrical.
9. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 1, wherein: the joint nut sealing element, the threaded connector and the threaded connector sealing bush are assembled in a combined mode, the joint nut and the threaded connector are screwed to compress the two sealing elements, the armored cable and the probe body are pressed tightly by the sealing elements, and the inside of the sealing device becomes a completely sealed environment.
10. The leak-proof oil seal device for a nuclear power plant steam turbine vibration probe as claimed in claim 1, wherein: the sealing device structure is split, so that the probe body sequentially passes through the central round hole of the device from the connector nut, the connector nut sealing piece, the threaded connector sealing bush, the threaded connector, the sealing O-shaped ring, the metal connecting ring, the sealing O-shaped ring, the threaded connector sealing bush, the connector nut sealing piece and the connector nut, and the probe body sequentially passes through the central round hole from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922350572.3U CN211320896U (en) | 2019-12-24 | 2019-12-24 | Oil leakage prevention sealing device for vibration probe of steam turbine of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922350572.3U CN211320896U (en) | 2019-12-24 | 2019-12-24 | Oil leakage prevention sealing device for vibration probe of steam turbine of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211320896U true CN211320896U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922350572.3U Active CN211320896U (en) | 2019-12-24 | 2019-12-24 | Oil leakage prevention sealing device for vibration probe of steam turbine of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211320896U (en) |
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2019
- 2019-12-24 CN CN201922350572.3U patent/CN211320896U/en active Active
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