CN202220625U - Connection mechanism for high and medium pressure valve of nuclear power plant turbine - Google Patents
Connection mechanism for high and medium pressure valve of nuclear power plant turbine Download PDFInfo
- Publication number
- CN202220625U CN202220625U CN2011202882037U CN201120288203U CN202220625U CN 202220625 U CN202220625 U CN 202220625U CN 2011202882037 U CN2011202882037 U CN 2011202882037U CN 201120288203 U CN201120288203 U CN 201120288203U CN 202220625 U CN202220625 U CN 202220625U
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- China
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- power plant
- nuclear power
- fastener
- valve rod
- steam turbine
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- Expired - Fee Related
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Abstract
The utility model relates to a connection mechanism for a high and medium pressure valve of a nuclear power plant turbine, which is connected with a valve rod and a cross head of the nuclear power plant turbine. The connection mechanism is formed by an upper clamping piece and a lower clamping piece which are symmetrically arranged on the connecting portion of the valve rod and the cross head. The upper clamping piece is in a door-shaped structure, the top portion is provided with a convex section, the lower clamping piece is in a reversed door-shaped structure, the bottom portion is provided with a convex section, and a clamping groove for clamping the valve rod is arranged between the upper clamping piece and the lower clamping piece. Compared with the prior art, the connection mechanism for the high and medium pressure valve of the nuclear power plant turbine has the advantages of being wide in application range, safe, reliable, convenient in overhaul and the like.
Description
Technical field
The utility model relates to a kind of connection set, especially relates to the bindiny mechanism of a kind of nuclear power plant steam turbine high pressure pitch.
Background technique
Turbine high-pressure governing valve is the visual plant of steam turbine speed control and safe operation; The quality of its regulation quality directly has influence on the stability of the control of turbine speed and unit load; Simultaneously also most important for the Security of unit; The draw gas problem of the serious swing of high-pressure governing valve that steam turbine exists under specific operation of refreshing 200MW/ east vapour/600MW of Shanghai Automobile Factory causes the pin fracture of high-pressure governing valve joint, a bar dropout; Directly have influence on the safe operation of unit, one of each genco has examined the safe operation of speed control system as the elaboration engineering leading indicator.Have influence on whole duration and the economic and technical norms transferred of unit.
The turbine high-pressure adjustment doors is as the important controlling mechanism of steam turbine; Its reliability is particularly important to the safety of unit, and high-pressure regulation every bar is in operation to rupture and thread off and can produces unpredictalbe influence to steam turbine control, when unit removal of load, unit tripping or other abnormal conditions; The turbine high-pressure adjustment doors will be leaned on the spring force quick closedown; And lost efficacy and can increase speed control system actuation time in the mechanical connection place, can cause the steam turbine hypervelocity when serious, and its harm is very serious.Therefore need fracture of high-pressure regulation every lever pin and dropout reason are analyzed, and take measures fundamentally to prevent that this type of phenomenon from frequently taking place.
Think that through serious analysis the main cause that thread biting locking takes place is because after the pin fracture, the valve vibrations cause the screw thread distortion.The serviceability rate of this equipment is merely 70% in all previous overhaul, and ratio of defects is up to 30%, and the serviceability rate that improves the door rod connector is very urgent.
The model utility content
The purpose of the utility model be exactly provide in order to overcome the defective that above-mentioned existing technology exists a kind of using scope wide, safe and reliable, overhaul the bindiny mechanism of nuclear power plant's steam turbine high pressure pitch easily.
The purpose of the utility model can realize through following technological scheme:
The bindiny mechanism of a kind of nuclear power plant steam turbine high pressure pitch, this bindiny mechanism connects the valve rod and the crosshead of nuclear steam turbine, it is characterized in that; Described bindiny mechanism is made up of upper fastener and lower fastener, is symmetricly set on the joint of valve rod and crosshead, and upper fastener is portal structures; The top is provided with convex section; Lower fastener is inverted portal structures, and the bottom is provided with convex section, forms the draw-in groove that card is established valve rod between upper fastener and the lower fastener.
Be connected through screw or spot welding between described upper fastener and the lower fastener.
The front portion of the convex section of described upper fastener contacts with crosshead, and the bottom is connected with the top of lower fastener.
The convex section of described lower fastener is connected with the bottom of upper fastener.
Compared with prior art, the utlity model has following advantage:
(1) using scope is wide: can be used for the valve that various screw threads are connected with pin
(2) safe and reliable: this structural design is simple, and do not contact directly valve rod and being connected of ten son heads, and the some postwelding forms integral body, does not have the phenomenon of pin fracture, and a bar dropout phenomenon just can not take place yet.
(3) maintenance is convenient: dismantle easy to maintenance, concerning equipment operation with overhaul have no trouble and worry.
Description of drawings
Fig. 1 is the structural representation of upper fastener;
Fig. 2 is the structural representation of lower fastener;
Fig. 3 is the mounting structure schematic representation of the utility model.
1 is that upper fastener, 2 is that lower fastener, 3 is that valve rod, 4 is that crosshead, 5 is gasket ring among the figure.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
The bindiny mechanism of a kind of nuclear power plant steam turbine high pressure pitch, bindiny mechanism is made up of upper fastener 1 and lower fastener 2, like Fig. 1, shown in 2.Upper fastener 1 is portal structures; The top is provided with convex section, and lower fastener 2 is inverted portal structures, and the bottom is provided with convex section; This bindiny mechanism connects the valve rod and the crosshead of nuclear steam turbine; Its scheme of installation is as shown in Figure 3, and upper fastener 1 and lower fastener 2 are symmetricly set on the joint of valve rod 3 and crosshead 4, and the front end of valve rod 3 also is provided with gasket ring 5.Form the draw-in groove that card is established valve rod 3 between upper fastener 1 and the lower fastener 2.Can be connected through screw or spot welding between upper fastener 1 and the lower fastener 2.The front portion of the convex section of upper fastener 1 contacts with crosshead 4, and the bottom is connected with the top of lower fastener 2.The convex section of lower fastener 2 is connected with the bottom of upper fastener 1.
During installation, need not use pin, use the utility model to be connected with the joint of crosshead 4, block place, the four directions of valve rod 3 roots then with crosshead joint symmetry then and on the limit, weld with convenient maintenance next time with electrical pads at valve rod 3.The utility model has overcome in the existing equipment unreasonable owing to linkage structure, the drawback of the pin fracture of high-pressure governor valve door bar joint, door bar dropout phenomenon occurs.Thereby can make the high-pressure governing valve safe operation, guarantee the normal safe operation of steam turbine.
Claims (4)
1. the bindiny mechanism of nuclear power plant's steam turbine high pressure pitch, this bindiny mechanism connects the valve rod and the crosshead of nuclear steam turbine, it is characterized in that; Described bindiny mechanism is made up of upper fastener and lower fastener, is symmetricly set on the joint of valve rod and crosshead, and upper fastener is portal structures; The top is provided with convex section; Lower fastener is inverted portal structures, and the bottom is provided with convex section, forms the draw-in groove that card is established valve rod between upper fastener and the lower fastener.
2. the bindiny mechanism of a kind of nuclear power plant according to claim 1 steam turbine high pressure pitch is characterized in that, is connected through screw or spot welding between described upper fastener and the lower fastener.
3. the bindiny mechanism of a kind of nuclear power plant according to claim 1 steam turbine high pressure pitch is characterized in that the front portion of the convex section of described upper fastener contacts with crosshead, and the bottom is connected with the top of lower fastener.
4. the bindiny mechanism of a kind of nuclear power plant according to claim 1 steam turbine high pressure pitch is characterized in that the convex section of described lower fastener is connected with the bottom of upper fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202882037U CN202220625U (en) | 2011-08-09 | 2011-08-09 | Connection mechanism for high and medium pressure valve of nuclear power plant turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202882037U CN202220625U (en) | 2011-08-09 | 2011-08-09 | Connection mechanism for high and medium pressure valve of nuclear power plant turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202220625U true CN202220625U (en) | 2012-05-16 |
Family
ID=46042652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202882037U Expired - Fee Related CN202220625U (en) | 2011-08-09 | 2011-08-09 | Connection mechanism for high and medium pressure valve of nuclear power plant turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202220625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454037A (en) * | 2014-10-24 | 2015-03-25 | 东方电气集团东方汽轮机有限公司 | Connecting structure for valve rod and crossed sleeve of turbine high-pressure main steam regulating valve |
-
2011
- 2011-08-09 CN CN2011202882037U patent/CN202220625U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454037A (en) * | 2014-10-24 | 2015-03-25 | 东方电气集团东方汽轮机有限公司 | Connecting structure for valve rod and crossed sleeve of turbine high-pressure main steam regulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120516 Termination date: 20140809 |
|
| EXPY | Termination of patent right or utility model |