CN204060821U - A kind of 660MW turbine high-pressure governing valve connecting rod of transformation - Google Patents
A kind of 660MW turbine high-pressure governing valve connecting rod of transformation Download PDFInfo
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- CN204060821U CN204060821U CN201420474990.8U CN201420474990U CN204060821U CN 204060821 U CN204060821 U CN 204060821U CN 201420474990 U CN201420474990 U CN 201420474990U CN 204060821 U CN204060821 U CN 204060821U
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Abstract
The utility model discloses a kind of 660MW turbine high-pressure governing valve connecting rod of transformation, comprise removably oil engine connecting rod and valve rod connecting rod, oil engine connecting rod and valve rod connecting rod pass through Flange joint, valve rod connecting rod is connected with pitch valve rod, and joint is provided with cutting ferrule, oil engine connecting rod is connected with oil engine piston rod.The utility model easy accessibility, is divided into two part split dismounting, without the need to dismounting simultaneously from upper and lower piston rod and valve rod simultaneously, avoids occurring screw thread snap fastener, repeatedly installs the phenomenons such as not in place, ensure installation quality.
Description
Technical field
The utility model relates to a kind of 660MW turbine high-pressure governing valve connecting rod of transformation.
Background technique
Datang Huangdao Power Plant, Shandong 2006,2007 in succession operation Liang Taishang vapour factory produces that N660/24.2/566/566 is overcritical, single shaft, three cylinders, four steam discharges, resuperheat, condensing steam turbine, and steam enters high-pressure turbine by the main steam valve assembly being arranged on steam turbine both sides.Be furnished with two main stop valves-modulating valve builtup member, be positioned at high intermediate pressure cylinder both sides, each one of every side.Each main steam valve assembly has two lift type adjustable valves, and the enable possition of modulating valve controlled by two oil engines be arranged on valve by electrohydraulic control system.The main stop valve of horizontal layout is also control by oil engine, and the steam come from boiler enters main steam pipe by two-way main inlet throttle-stop valve and modulating valve, then passes into four nozzle boxs in high-pressure cylinder respectively.During startup, main inlet throttle-stop valve controls the steam flow before generator connecting in parallel with system, and provides fast valving control in emergency trip situation.Modulating valve is used for controlling to control throttle flow from steam turbine synchronous speed and generator load;
After unit operation all repeatedly there is stem dropping fault in two unit high-pressure governing valves, has a strong impact on unit safety operation.Stem dropping major failure phenomenon is as follows:
(1) input valve command, feedback normally follows the tracks of change, but load is unchanged.
(2) removal of load in unit operation, when load variations amount comes off with valve, aperture size is relevant.
Repeatedly come off and illustrate that high-pressure governing valve connecting rod exists design deficiency, need improve, prove connecting rod unreasonable structure by analysis, be mainly following some:
(1) structural design is unreasonable, complex process during dismounting oil engine manipulation seat.Can find out that connecting rod top is connected with oil engine piston rod from high-pressure governing valve assembling drawing, bottom is connected with pitch valve rod, and during in-site installation, maintainer takes connecting rod to be first filled to oil engine, then hangs flat by manipulation seat entirety, and connecting rod bottom is threaded on valve rod.Because oil engine handles seat volume weight greatly, in-site installation position is narrow, cannot ensure vertical, often occur screw thread snap fastener, repeatedly install the phenomenons such as not in place in installation process during rotation;
(2) between valve rod and connecting rod, assembly technology is complicated, cannot meet during practical set.By the connecting rod installation requirement of Shang Qi factory, valve rod and connecting rod need be tightened, make gapless between valve stem top and connecting rod and have the tight power of certain assembling, then joining brill stop pin.This structure newly installs unit can meet onsite application requirement, but after long-time running and being dismounted for multiple times, above cuts open and there is gap, impact force concentrates on spiral shell and buckles, effect increased frequency, deformed threads, spring impact force is finally caused stop pin shear deformation to be disconnected, final stem dropping.
Model utility content
The utility model, in order to solve the problem, proposes a kind of 660MW turbine high-pressure governing valve connecting rod of transformation, and this device can ensure turbine high-pressure governing valve reliable in action working properly, stable.
To achieve these goals, the utility model adopts following technological scheme:
A kind of 660MW turbine high-pressure governing valve connecting rod of transformation, comprise removably oil engine connecting rod and valve rod connecting rod, oil engine connecting rod and valve rod connecting rod pass through Flange joint, valve rod connecting rod is connected with pitch valve rod, and joint is provided with cutting ferrule, oil engine connecting rod is connected with oil engine piston rod.
Described valve rod is provided with circular groove, embeds in circular groove bottom cutting ferrule.
The upper end of described oil engine connecting rod is provided with screw thread.
The lower end of described valve rod connecting rod is provided with screw thread.
Be fastened by bolts between described oil engine connecting rod and valve rod connecting rod.
Working principle of the present utility model is: pitch connecting rod is transformed into removable two-part, pass through Flange joint, overall without the need to rotating machinery during dismounting, the bolt that direct dismounting is fastening and flange, the oil engine connecting rod of upper half part is removed from oil engine piston rod, the valve rod connecting rod of lower half portion is removed from pitch valve rod.
The beneficial effects of the utility model are:
(1) easy accessibility, is divided into two part split dismounting, without the need to dismounting simultaneously from upper and lower piston rod and valve rod simultaneously, avoids occurring screw thread snap fastener, repeatedly installs the phenomenons such as not in place, ensure installation quality;
(2) reliability is high, installs cutting ferrule additional fastening, make the connection of connecting rod and pitch valve rod more firmly, prevent stem dropping;
(3) valve rod processing circular groove, embeds bottom cutting ferrule in circular groove, ensures to have between cutting ferrule and valve rod enough to hold intensity tightly;
(4) assembly technology is simple, meet practical set demand, after solving long-time running and being dismounted for multiple times, above cut open there is gap, impact force concentrates on spiral shell and buckles, acts on increased frequency, deformed threads, finally causes spring impact force by the problem of stop pin shear deformation disconnection, stem dropping.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the E-E face schematic diagram of Fig. 1 of the present utility model;
Fig. 3 is cutting ferrule schematic diagram of the present utility model;
Fig. 4 (a) is valve rod partial schematic diagram of the present utility model;
Fig. 4 (b) is E-E face schematic diagram in Fig. 4 (a) of the present utility model;
Fig. 5 is assembling partial schematic diagram of the present utility model.
Wherein: 1, oil engine connecting rod; 2, valve rod connecting rod; 3, oil engine piston rod; 4, pitch valve rod; 5, clamping bolt; 6, cutting ferrule; 7, circular groove.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As Figure 1-Figure 5, a kind of 660MW turbine high-pressure governing valve connecting rod of transformation, comprise removably oil engine connecting rod 1 and valve rod connecting rod 2, oil engine connecting rod 1 and valve rod connecting rod 2 pass through Flange joint, valve rod connecting rod 2 is connected with pitch valve rod 4, and joint is provided with cutting ferrule 6, oil engine connecting rod 1 is connected with oil engine piston rod 3.
Pitch valve rod 4 is provided with circular groove, embeds in circular groove 7 bottom cutting ferrule 6.
The upper end of oil engine connecting rod 1 is provided with screw thread.
The lower end of valve rod connecting rod 2 is provided with screw thread.
Fastening by clamping bolt 5 between oil engine connecting rod 1 and valve rod connecting rod 2.
Working principle is: pitch connecting rod is transformed into removable two-part, pass through Flange joint, overall without the need to rotating machinery during dismounting, the bolt that direct dismounting is fastening and flange, the oil engine connecting rod 1 of upper half part is removed from oil engine piston rod 3, the valve rod connecting rod 2 of lower half portion is removed from pitch valve rod 4.
Be connected by connecting rod between high-pressure governing valve valve rod with oil engine piston rod, connecting rod bears tensile stress during valve opening, also beats the pressure stress of spring when lock cuts out by unit simultaneously.In design, demand fulfillment maintenance is convenient, the conditions such as reliable operation.Existing connecting rod is unreasonable through onsite application certification structure, mainly contain following some:
(1) structural design is unreasonable, complex process during dismounting oil engine manipulation seat.Can find out that connecting rod top is connected with oil engine piston rod from high-pressure governing valve assembling drawing, bottom is connected with pitch valve rod, and during in-site installation, maintainer takes connecting rod to be first filled to oil engine, then hangs flat by manipulation seat entirety, and connecting rod bottom is threaded on valve rod.Because oil engine handles seat volume weight greatly, in-site installation position is narrow, cannot ensure vertical, often occur screw thread snap fastener, repeatedly install the phenomenons such as not in place in installation process during rotation.
(2) between valve rod and connecting rod, assembly technology is complicated, cannot meet during practical set.Valve rod and connecting rod need be tightened during installation, make gapless between valve stem top and connecting rod and have the tight power of certain assembling, then joining brill stop pin.This structure newly installs unit can meet onsite application requirement, but after long-time running and being dismounted for multiple times, above cuts open and there is gap, impact force concentrates on spiral shell and buckles, effect increased frequency, deformed threads, spring force impact force is finally caused stop pin shear deformation to be disconnected, final stem dropping.
For thoroughly eliminating stem dropping defect, solving the unreasonable problem of former design simultaneously, determining following modification scheme:
(1) connecting rod is transformed, and new connecting rod structural design divides demountable structure in being, connecting rod is changed into oil engine connecting rod and valve rod connecting rod two part, Flange joint is taked in centre, new structure easy accessibility, can ensure good installation quality;
(2) connecting rod is connected with stem lower portion and adopts cutting ferrule to reinforce, and avoids stem dropping;
(3) valve rod processing circular groove, embeds bottom cutting ferrule in circular groove, ensures to have between cutting ferrule and valve rod enough to hold intensity tightly.
After Huang Island power plant No. 6 complete unit startings of major overhaul, turbine high-pressure governing valve is working properly, reliable through long-time running having stable behavior, can determine that transformation is successful.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (5)
1. the 660MW turbine high-pressure governing valve connecting rod of a transformation, it is characterized in that: comprise removably oil engine connecting rod and valve rod connecting rod, oil engine connecting rod and valve rod connecting rod pass through Flange joint, valve rod connecting rod is connected with pitch valve rod, and joint is provided with cutting ferrule, oil engine connecting rod is connected with oil engine piston rod.
2. the 660MW turbine high-pressure governing valve connecting rod of a kind of transformation as claimed in claim 1, is characterized in that: described valve rod is provided with circular groove, embeds in circular groove bottom cutting ferrule.
3. the 660MW turbine high-pressure governing valve connecting rod of a kind of transformation as claimed in claim 1, is characterized in that: the upper end of described oil engine connecting rod is provided with screw thread.
4. the 660MW turbine high-pressure governing valve connecting rod of a kind of transformation as claimed in claim 1, is characterized in that: the lower end of described valve rod connecting rod is provided with screw thread.
5. the 660MW turbine high-pressure governing valve connecting rod of a kind of transformation as claimed in claim 1, is characterized in that: be fastened by bolts between described oil engine connecting rod and valve rod connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474990.8U CN204060821U (en) | 2014-08-21 | 2014-08-21 | A kind of 660MW turbine high-pressure governing valve connecting rod of transformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474990.8U CN204060821U (en) | 2014-08-21 | 2014-08-21 | A kind of 660MW turbine high-pressure governing valve connecting rod of transformation |
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| CN204060821U true CN204060821U (en) | 2014-12-31 |
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| CN201420474990.8U Active CN204060821U (en) | 2014-08-21 | 2014-08-21 | A kind of 660MW turbine high-pressure governing valve connecting rod of transformation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969009A (en) * | 2017-05-27 | 2017-07-21 | 华电宁夏灵武发电有限公司 | A kind of steam turbine is high, the Hough connector of intermediate pressure main stop valve |
| CN108915794A (en) * | 2018-08-28 | 2018-11-30 | 河北大唐国际迁安热电有限责任公司 | High pitch anti-dropout specific purpose tool |
-
2014
- 2014-08-21 CN CN201420474990.8U patent/CN204060821U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969009A (en) * | 2017-05-27 | 2017-07-21 | 华电宁夏灵武发电有限公司 | A kind of steam turbine is high, the Hough connector of intermediate pressure main stop valve |
| CN106969009B (en) * | 2017-05-27 | 2019-09-24 | 华电宁夏灵武发电有限公司 | A kind of steam turbine is high, intermediate pressure main stop valve Hough connector |
| CN108915794A (en) * | 2018-08-28 | 2018-11-30 | 河北大唐国际迁安热电有限责任公司 | High pitch anti-dropout specific purpose tool |
| CN108915794B (en) * | 2018-08-28 | 2023-08-18 | 河北大唐国际迁安热电有限责任公司 | Special anti-drop tool for high-speed door |
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