CN208457324U - A kind of valve shaft sealing structure of turbine-generator units spiral case blow valve - Google Patents
A kind of valve shaft sealing structure of turbine-generator units spiral case blow valve Download PDFInfo
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- CN208457324U CN208457324U CN201820887551.8U CN201820887551U CN208457324U CN 208457324 U CN208457324 U CN 208457324U CN 201820887551 U CN201820887551 U CN 201820887551U CN 208457324 U CN208457324 U CN 208457324U
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- valve shaft
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Abstract
A kind of valve shaft sealing structure of turbine-generator units spiral case blow valve, sealing structure are located at the corresponding valve shaft position of blow valve ell, including seal receptacle, sealing element, gland；Seal receptacle, gland are flanged (FLGD) cyclic structures, the outer wall and ell inner wall of ring cooperate, the inner hole of ring is stepped hole, and aperture is upper, and macropore is under, flange is located at macropore bottom end, aperture hole wall and valve shaft cooperate, and the gap between macropore hole wall and valve shaft constitutes seal groove, and flange has circumferentially distributed multiple screw perforations, there is corresponding screw hole on ell bottom face, seal receptacle is fixed on ell bottom face from bottom to top by screw；Sealing element is filled in seal groove；Flange is located at the bottom end of ring, the inner wall and valve shaft of ring cooperate, the outer wall and seal receptacle macropore inner wall of ring cooperate, the top surface of ring from bottom to top top tight sealing part, gland flange has circumferentially distributed multiple screw perforations, there is corresponding screw hole in seal receptacle flange bottom, gland is fixed on seal receptacle flange bottom from bottom to top by screw.
Description
Technical field
The utility model relates to turbine-generator units spiral case blow valve more particularly to the valve shaft sealing structures of the blow valve.
Background technique
Drainage can be gradually appeared after turbine-generator units spiral case blow valve longtime running, the reason is that valve shaft sealing element
Damage will usually replace sealing element in unit maintenance, but due to valve shaft sealing because design structure defect can not directly carry out more
It changes, it is necessary to valve all be decomposed and could be replaced after unit spiral case draining, difficulty of construction and risk are big, and time-consuming, inspection
It repairs at high cost.
Further more, sealing element used is open loop structure, connector uses overlapping mode when construction, is easy infiltration.
Summary of the invention
Sealing more changes jobs existing when the technical issues of solving needed for the utility model is for the maintenance of spiral case blow valve
Technical deficiency and the sealing of spiral case blow valve there is the security risk that leaks, a kind of Novel water wheel generating set spiral case is provided
The valve shaft sealing structure of blow valve, with the method, sealing reliability is higher, and maintenance is more convenient, can reduce spiral case blow valve
Seep water ratio of defects, improves overhaul efficiency.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solutions.
A kind of valve shaft sealing structure of turbine-generator units spiral case blow valve, it is corresponding which is located at blow valve ell
Valve shaft position, which is characterized in that the sealing structure includes seal receptacle, sealing element, gland, and the seal receptacle is flanged (FLGD) ring
The inner wall of shape structure, the outer wall of ring and ell cooperates, and the inner hole of ring is stepped hole, and aperture is upper, and under, flange is located at big macropore
Hole bottom end, aperture hole wall and valve shaft cooperate, and the gap between macropore hole wall and valve shaft constitutes seal groove, have on flange circumferentially distributed
Multiple screw perforations, have corresponding screw hole on ell bottom face, which is fixed on ell by screw from bottom to top
On bottom face；The sealing element is filled in seal groove；The gland is flanged (FLGD) cyclic structure, and flange is located at the bottom of ring
End, the inner wall of ring and valve shaft cooperate, and the outer wall and seal receptacle macropore inner wall of ring cooperate, the top surface of ring from bottom to top top tight sealing
Part has circumferentially distributed multiple screw perforations in gland flange, there is corresponding screw hole on seal receptacle flange bottom, and the gland is logical
Screw is crossed to be fixed on from bottom to top on seal receptacle flange bottom.
The sealing element is the closed loop sealing ring that cross sectional shape is " V " shape.
Further, totally three layers of the sealing element, upper-lower overlapping arrangement.
The sealing element is polyurethane or NBR sealing element.
The valve shaft is located at diameter of the sealing structure with the diameter of lower portion no more than position where sealing structure.
The utility model has the beneficial effects that
Using above-mentioned sealing structure, when unit maintenance, replaces blow valve shaft seal, need to only open blow valve valve deck, then will
Valve shaft is unlocked with valve disc, and valve shaft is hung out, that is, is convenient to replacement sealing element, and not only easy but also quick, time saving and energy saving, safety is high
Effect.It in addition, the improvement of sealing element, can prolong the service life and the replacement cycle, reduce operating cost.
Detailed description of the invention
Fig. 1 is the valve shaft sealing structure figure of this turbine-generator units spiral case blow valve
In figure: 1- valve shaft；2- ell；3- seal receptacle；4- seal receptacle fastening screw；5- sealing element；6- gland；7- gland is tight
Gu screw.
Specific embodiment
Referring to Fig. 1, the valve shaft sealing structure of this turbine-generator units spiral case blow valve, which is located at blow valve elbow
Corresponding 1 position of valve shaft of pipe 2, including seal receptacle 3, sealing element 5, gland 6；The seal receptacle 3 is flanged (FLGD) cyclic structure, ring
Outer wall and the inner wall of ell 2 cooperate, the inner hole of ring is stepped hole, and aperture is upper, and for macropore under, flange is located at macropore bottom end,
Aperture hole wall and valve shaft 1 cooperate, and the gap between macropore hole wall and valve shaft 1 constitutes seal groove, have on flange circumferentially distributed more
A screw perforation has corresponding screw hole on 2 bottom face of ell, and the seal receptacle 3 is solid from bottom to top by seal receptacle fastening screw 4
It is scheduled on 2 bottom face of ell；The sealing element 5 is filled in seal groove；The gland 6 is flanged (FLGD) cyclic structure, flange
Positioned at the bottom end of ring, the inner wall and valve shaft 1 of ring cooperate, and the outer wall and 3 macropore inner wall of seal receptacle of ring cooperate, the top surface of ring by lower and
Upper top tight sealing part 5 has circumferentially distributed multiple screw perforations on 6 flange of gland, has on 3 flange bottom of seal receptacle corresponding
Screw hole, the gland 6 are fixed on 3 flange bottom of seal receptacle from bottom to top by screw 7.
Above-mentioned seal receptacle 3, gland 6 and its fastening screw (seal receptacle fastening screw 4, gland fastening screw 7) are with stainless
Steel is process.
In the present invention, sealing element 5 uses special designing, material selection polyurethane or NBR, has good resistance to
Oiliness, wearability and cold resistance；Its structure uses closed loop ring type structure, can avoid showing for former open loop structure lap-joint infiltration occur
As cross sectional shape is " V " shape, when sealing element 5 is glanded 6 compression, flexible deformation occurs, can extend in the axial direction, sealing effect pole
It is good；Sealing element 5 sets three layers altogether, and upper-lower overlapping arrangement further enhances integral sealing intensity, durable, can greatly prolong
Service life and replacement cycle.
The operating procedure for replacing sealing element 5 is as follows: opening the valve deck of blow valve, dismantles the connection of valve shaft 1 Yu valve disc, by valve
Axis 1 is hung out, and removes gland 6, digs out old sealing element 5, is inserted new seal 5, is covered gland 6, will gland fastening screw 7
Valve shaft 1 lifts up into valve casing, and valve shaft 1 is connect with valve disc, finally covers valve deck, and tight valve deck bolt.
It is worth noting that former valve shaft 1 is multi-diameter shaft, there is one section of diameter (D2 in figure) to be greater than sealing structure in the middle part of valve shaft 1
1 diameter of valve shaft (D1 in figure) at place position, the installation for making seal receptacle 3, gland 6, disassembly can not be carried out, therefore need to handle by this,
Method is by turning at D2 to being not more than D1.
Claims (5)
1. a kind of valve shaft sealing structure of turbine-generator units spiral case blow valve, it is corresponding which is located at blow valve ell
Valve shaft position, which is characterized in that the sealing structure includes seal receptacle, sealing element, gland；The seal receptacle is flanged (FLGD) ring-type
The inner wall of structure, the outer wall of ring and ell cooperates, and the inner hole of ring is stepped hole, and aperture is upper, and for macropore under, flange is located at macropore
Bottom end, aperture hole wall and valve shaft cooperate, and the gap between macropore hole wall and valve shaft constitutes seal groove, have on flange circumferentially distributed
Multiple screw perforations have corresponding screw hole on ell bottom face, which is fixed on ell bottom by screw from bottom to top
On end face；The sealing element is filled in seal groove；The gland is flanged (FLGD) cyclic structure, and flange is located at the bottom end of ring,
The inner wall of ring and valve shaft cooperate, and the outer wall and seal receptacle macropore inner wall of ring cooperate, the top surface of ring from bottom to top top tight sealing part, pressure
There are circumferentially distributed multiple screw perforations on lid flange, there is corresponding screw hole on seal receptacle flange bottom, which passes through spiral shell
Nail is fixed on from bottom to top on seal receptacle flange bottom.
2. the valve shaft sealing structure of turbine-generator units spiral case blow valve according to claim 1, which is characterized in that described
Sealing element is the closed loop sealing ring that cross sectional shape is " V " shape.
3. the valve shaft sealing structure of turbine-generator units spiral case blow valve according to claim 2, which is characterized in that described
Totally three layers of sealing element, upper-lower overlapping arrangement.
4. the valve shaft sealing structure of turbine-generator units spiral case blow valve according to claim 1 to 3, feature exist
In the sealing element is polyurethane or NBR sealing element.
5. the valve shaft sealing structure of turbine-generator units spiral case blow valve according to claim 1, which is characterized in that described
Valve shaft is located at diameter of the sealing structure with the diameter of lower portion no more than position where sealing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820887551.8U CN208457324U (en) | 2018-06-08 | 2018-06-08 | A kind of valve shaft sealing structure of turbine-generator units spiral case blow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820887551.8U CN208457324U (en) | 2018-06-08 | 2018-06-08 | A kind of valve shaft sealing structure of turbine-generator units spiral case blow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208457324U true CN208457324U (en) | 2019-02-01 |
Family
ID=65160716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820887551.8U Active CN208457324U (en) | 2018-06-08 | 2018-06-08 | A kind of valve shaft sealing structure of turbine-generator units spiral case blow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208457324U (en) |
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2018
- 2018-06-08 CN CN201820887551.8U patent/CN208457324U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 614900 central control building, Hekou Road, Shawan Town, Shawan District, Leshan City, Sichuan Province Patentee after: Guoneng Daduhe maintenance and installation Co.,Ltd. Address before: 614900 central control building, Hekou Road, Shawan Town, Shawan District, Leshan City, Sichuan Province Patentee before: GUODIAN DADUHE MAINTENANCE & INSTALLATION Co.,Ltd. |