CN217838111U - Steam turbine high pressure main valve and adjusting valve inner valve cover lifting device - Google Patents
Steam turbine high pressure main valve and adjusting valve inner valve cover lifting device Download PDFInfo
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- CN217838111U CN217838111U CN202121167956.2U CN202121167956U CN217838111U CN 217838111 U CN217838111 U CN 217838111U CN 202121167956 U CN202121167956 U CN 202121167956U CN 217838111 U CN217838111 U CN 217838111U
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Abstract
The utility model relates to a valve gap lifting device in steam turbine high pressure main throttle valve and accent, this lifting device is including the second gallows that is used for connecting the first gallows of high accent inner valve lid and is used for connecting high owner inner valve lid, and wherein, first gallows and second gallows are fixed connection back to back each other, and the free end top of first gallows and second gallows is connected with the driving hoisting point respectively. Compared with the prior art, the utility model discloses with the height main, two independent interior valve closure hoist and mount frame built-up welding of height accent be a whole hoist and mount subassembly, when carrying out the hoist and mount process, no longer need assemble frame-type gallows and hoist and mount frame, also avoided frequent repeated leveling operation, can effectively simplify the operation degree of difficulty of steam turbine high pressure main valve and the interior valve closure hoist and mount of accent from this, when reducing hoist and mount process and use, improve production efficiency.
Description
Technical Field
The utility model belongs to the technical field of steam turbine hoist and mount construction technique and specifically relates to a valve bonnet lifting device in steam turbine high pressure main throttle and the valve.
Background
The high-pressure main valve is a protection device for the steam turbine to quickly cut off the steam inlet and stop the steam turbine, and is mainly controlled to quickly close and open by pressure oil, and the closing time is less than 0.8 second; the regulating valve is a valve for controlling the rotating speed and the output power of the steam turbine, and the rotating speed and the power are controlled by changing the amount of steam entering the steam turbine. The inner valve cover is used as an important part in a main valve and a regulating valve, and the inner valve cover needs to be disassembled for many times in the practical application process of the steam turbine.
In the current steam turbine structure, the structures of a high-pressure main valve and a valve inner valve cover are usually more special: the inner valve cover is inserted into the deeper position of the valve body, the gravity center is inward, and the lifting point is outward. Before disassembling the core of the inner valve cover, the special splicing tool and the lifting appliance are often required to be installed for many times, and after accurate counterweight leveling, the inner valve cover can be lifted out of the valve body, for example, the traditional method adopts frame-type lifting frame lifting, frame-type lifting frame and lifting frame assembling and lifting frame counterweight, the whole lifting process is quite complex, the requirement on the experience degree of constructors is high, and the inner valve cover can be successfully lifted out after many times of lifting attempts.
When there is the disk seat defect when the high pressure valve of unit needs to carry out on-the-spot disk seat restoration, still need carry out many times trial assembly disintegration operation in order to inspect the repair effect to the internal valve gap, this can make the hoist and mount work load be the increase of several times undoubtedly, and every hoist and mount construction all can occupy a large amount of manpower resources and driving resources.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steam turbine high pressure main throttle and accent door inner valve lid lifting device in order to overcome the defect that above-mentioned prior art exists to effectively simplify the hoist and mount operation of high pressure main throttle and accent door inner valve lid.
The purpose of the utility model can be realized by the following technical proposal: the utility model provides a steam turbine high pressure main steam valve and accent door inner valve lid lifting device, is including the first gallows that is used for connecting high accent inner valve lid and the second gallows that is used for connecting high main inner valve lid, first gallows and second gallows are fixed connection back to back each other, the free end top of first gallows and second gallows is connected with the driving hoisting point respectively.
Furthermore, the first hanging bracket and the second hanging bracket are fixedly connected through thick-wall pipes in a welding mode.
Furthermore, the outer diameter of the thick-wall pipe is more than or equal to 200mm and less than or equal to 299mm.
Furthermore, the two ends of the thick-wall pipe are fixedly connected with the first hanging bracket and the second hanging bracket respectively in a full-circle full-welding mode.
Furthermore, the tops of the free ends of the first hanging bracket and the second hanging bracket are respectively connected with a crane lifting point through a guide chain which can be extended in a telescopic way.
Furthermore, the tops of the free ends of the first hanging bracket and the second hanging bracket are respectively provided with a screw hole for mounting a lifting lug.
Furthermore, the lifting lug is connected with the guide chain, one end of the guide chain is connected with the lifting lug through the lifting hook, the other end of the guide chain is an adjusting end, and the adjusting end is connected with the crane lifting point.
Further, the first hanging bracket and the second hanging bracket are respectively connected with the high-pressure regulating inner valve cover and the high main inner valve cover through bolts.
Furthermore, a through hole for connecting and installing the height-adjustable inner valve cover is formed in the side face of the free end of the first hanging bracket.
Furthermore, a through hole for connecting and installing the high main inner valve cover is formed in the side face of the free end of the second hanging bracket.
A method for hoisting a high-pressure main valve and an inner valve cover of an adjusting valve of a steam turbine comprises the following steps:
if the high-tone inner valve cover is to be hoisted, the high-tone inner valve cover is connected with the free end of the first hanger, then the top of the free end of the first hanger is vertically connected to a crane hoisting point, the top of the free end of the second hanger is obliquely connected to the crane hoisting point, at the moment, the top of the free end of the first hanger is used as a hoisting point, the top of the free end of the second hanger is used as a leveling point, and the distance between the leveling point and the crane hoisting point is changed through adjustment, so that the leveling operation can be realized, and the hoisting of the high-tone inner valve cover is completed;
if the high main inner valve cover is to be hoisted, the high main inner valve cover is connected with the free end of the second hanger, then the top of the free end of the second hanger is vertically connected to a crane lifting point, the top of the free end of the first hanger is obliquely connected to the crane lifting point, at the moment, the top of the free end of the second hanger is used as a lifting point, the top of the free end of the first hanger is used as a leveling point, and the distance between the leveling point and the crane lifting point is changed through adjustment, so that the leveling operation can be realized, and the hoisting of the high main inner valve cover is completed.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses the first gallows that will be used for connecting high pressure main vapour door and the second gallows that is used for connecting high main inner valve gap is fixed connection back to back each other, be different from the mode of the special frame gallows of tradition, neither need special frame gallows, also need not carry out the operation of assembling of frame gallows and hoisting frame, utilize first gallows free end top and second gallows free end top to be connected to same driving hoisting point respectively, when hoisting high pressure main inner valve gap or hoisting high main inner valve gap, only need through adjusting first gallows free end top, second gallows free end top and driving between the hoisting point the distance can with the hookup location relation, need not to carry out the counter weight leveling work of relapseing, simplify the hoist and mount operation of high pressure main vapour door and accent internal valve lid from this greatly.
2. The utility model discloses a middle thick-walled pipe welded mode to further prolong the connection of first gallows and second gallows, utilize lever principle to make when hoist and mount interior valve gap and whole lifting device's focus backward move, only need can carry out the leveling operation through adjusting the distance between leveling point and the driving hoisting point, further reduce the hoist and mount process degree of difficulty from this, guarantee the reliability of hoist and mount simultaneously.
Drawings
FIG. 1 is a schematic view of a first hanger connected to a second hanger;
FIG. 2 is a schematic structural diagram of hoisting a high-adjustable inner valve cover in the embodiment;
the notation in the figure is: 1. a first hanger 2, a second hanger 3, a thick-wall pipe 4, a height-adjustable inner valve cover, 5, a crane lifting point, 6, a lifting point, 7 and a leveling point.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 and fig. 2, a high-pressure main valve and a valve adjusting inner valve cover hoisting tool of a steam turbine comprises a first hanger 1 for connecting a high-pressure adjusting inner valve cover 4 and a second hanger 2 for connecting the high-pressure main inner valve cover, wherein the first hanger 1 and the second hanger 2 are fixedly connected back to back, the tops of free ends of the first hanger 1 and the second hanger 2 are respectively connected with a crane hoisting point 5, wherein the first hanger 1 and the second hanger 2 are fixedly connected by welding a thick-wall pipe 3, in the embodiment, the outer diameter of the thick-wall pipe 3 is greater than or equal to 200mm and less than or equal to 299mm, and the two ends of the thick-wall pipe 3 are respectively fixedly connected with the first hanger 1 and the second hanger 2 in a full-circle welding manner.
In addition, the top of the free end of the first hanger 1 and the top of the free end of the second hanger 2 are respectively connected with the crane lifting point 5 through a guide chain which can extend and retract, specifically, the top of the free end of the first hanger 1 and the top of the free end of the second hanger 2 are respectively provided with a wire hole for installing a lifting lug, the lifting lug is connected with the guide chain, one end of the guide chain is connected with the lifting lug through a lifting hook, the other end of the guide chain is an adjusting end, and the adjusting end is connected with the crane lifting point 5.
In practical application, a through hole for connecting and installing the high-altitude inner valve cover 4 can be formed in the side surface of the free end of the first hanger 1, and a through hole for connecting and installing the high-altitude inner valve cover can be formed in the side surface of the free end of the second hanger 2, so that the first hanger 1 and the second hanger 2 can be correspondingly connected with the high-altitude inner valve cover 4 and the high-altitude inner valve cover respectively by using bolts.
The hoisting tool is applied to practice, and the specific hoisting process is as follows:
as shown in fig. 2, if the high-lift inner valve cover 4 is to be hoisted, the high-lift inner valve cover 4 is connected to the free end of the first hanger 1, then the top of the free end of the first hanger 1 is vertically connected to the crane lifting point 5, the top of the free end of the second hanger 2 is obliquely connected to the crane lifting point 5, at this time, the top of the free end of the first hanger 1 is used as a lifting point 6, the top of the free end of the second hanger 2 is used as a leveling point 7, and the distance between the leveling point 7 and the crane lifting point 5 is adjusted and changed, so that leveling operation can be realized, and the hoisting of the high-lift inner valve cover 4 is completed;
if the high main inner valve cover is hoisted, the high main inner valve cover is connected with the free end of the second hanger 2, then the top of the free end of the second hanger 2 is vertically connected to a crane lifting point 5, the top of the free end of the first hanger 1 is obliquely connected to the crane lifting point 5, at the moment, the top of the free end of the second hanger 2 is used as a lifting point 6, the top of the free end of the first hanger 1 is used as a leveling point 7, and the distance between the leveling point and the crane lifting point 5 is changed through adjustment, so that the leveling operation can be realized, and the high main inner valve cover is hoisted.
The utility model discloses consider that steam turbine high pressure main throttle and the interior valve bonnet of transfer have the valve body of inserting deeper position, focus in and the hoisting point characteristics on the outside partially, improve lifting device: with high owner, two independent inner valve lid hoist and mount frame built-up welding of height accent are an integral hoisting subassembly, this subassembly is fixed a position back to back by valve lid hoist and mount frame (second gallows promptly) and high pressure regulating valve inner valve lid hoist and mount frame (first gallows promptly) in the high pressure main steam valve, use thick-walled pipe welded fastening between two hoist and mount framves, this part of special frame gallows can be saved to the hoisting subassembly after using the improvement in the hoist and mount process, the process of assembling of frame gallows and hoist and mount frame has also been saved simultaneously. The step of frequently hoisting and placing a special hoisting tool is not needed when the hoisting switching operation is carried out on the high main and high adjustment, and the hoisting assembly can realize the hoisting switching of the high main and high adjustment inner valve covers through turning installation; during hoisting, no counterweight leveling work is needed, and the hoisting assembly can be leveled directly through the guide chain; the hoisting assembly is used for welding and extending a high main hoisting frame and a high adjusting hoisting frame with a middle thick-walled pipe, the gravity center of the inner valve cover and the hoisting assembly is moved backwards by utilizing the lever principle, the original hoisting point is adopted for hoisting, leveling operation is carried out through the hoisting point at the extending end, and if the hoisting operation needs to be switched to the high main inner valve cover, the hoisting operation can be realized by only exchanging the hoisting point with the leveling point.
To sum up, the technical scheme of the utility model the hoist and mount process that can significantly reduce is used time, is improved production efficiency: the frame type hanger is omitted, so that the procedures of frame type hanger hoisting and assembling of the frame type hanger and the hoisting frame can be omitted (the procedure is omitted, and the time can be saved by about 30 minutes). During the hoisting operation, the operation of adjusting the inner valve cover and the counterweight of the hoisting frame at any time to keep the inner valve cover in a horizontal state is also omitted (the process is omitted, and the time can be saved by about 30 minutes), and the processes all need the whole-process matched operation of the travelling crane. When the hoisting of the high main valve cover and the high adjusting inner valve cover is switched, the process of disassembling the frame type hanger and the hoisting frame, replacing the hoisting frame and then assembling again is not needed (the process is omitted, and the time can be saved by about 45 minutes).
The technical scheme of the utility model can reduce the hoist and mount operation degree of difficulty by a wide margin: all hoisting pieces are large pieces, the original process needs to carry out installation and splicing of the hoisting device and accurate counterweight leveling, and the hoisting device can be successfully hoisted out after multiple hoisting attempts, so that the difficulty of the hoisting process is high, and the experience requirement of constructors is high. The improved hoisting assembly does not need to be assembled and does not need to be balanced, and the leveling can be directly carried out through the leveling guide chain, so that the operation is simple and convenient, the effect is intuitive, and the requirement on the experience degree of constructors is low.
The technical scheme of the utility model in, high owner, high accent valve inner valve lid special lifting device simplify to 1 by original 3, store the transportation of specialized tool and bring very big convenience.
Claims (10)
1. The utility model provides a steam turbine high pressure main throttle valve and accent door inner valve lid lifting device which characterized in that, is including first gallows (1) that is used for connecting high accent inner valve lid (4) and second gallows (2) that are used for connecting high main inner valve lid, first gallows (1) and second gallows (2) are back to back fixed connection each other, the free end top of first gallows (1) and second gallows (2) is connected with driving hoisting point (5) respectively.
2. The lifting tool for the main high-pressure valve and the inner valve cover of the governing valve of the steam turbine according to claim 1, wherein the first hanger (1) and the second hanger (2) are fixedly connected by welding through a thick-wall pipe (3).
3. The lifting tool for the main high-pressure valve and the inner valve cover of the governing valve of the steam turbine according to claim 2, wherein the outer diameter of the thick-wall pipe (3) is greater than or equal to 200mm and less than or equal to 299mm.
4. The lifting tool for the high-pressure main throttle valve and the inner valve cover of the governing valve of the steam turbine as claimed in claim 2, wherein both ends of the thick-walled pipe (3) are fixedly connected with the first hanger (1) and the second hanger (2) respectively in a full-circle full-welding mode.
5. The lifting tool for the main high-pressure main valve and the inner valve cover of the adjusting valve of the steam turbine as claimed in claim 1, characterized in that the top parts of the free ends of the first hanger (1) and the second hanger (2) are respectively connected with the crane lifting point (5) through a guide chain which can be extended telescopically.
6. The lifting tool for the high-pressure main throttle valve and the inner valve cover of the regulating valve of the steam turbine according to claim 5, wherein the top parts of the free ends of the first lifting frame (1) and the second lifting frame (2) are respectively provided with a threaded hole for mounting a lifting lug.
7. The steam turbine high pressure main valve and adjusting valve inner valve cover lifting tool according to claim 6, wherein the lifting lug is connected with the guide chain.
8. The lifting tool for the main high-pressure valve and the inner valve cover of the adjusting valve of the steam turbine according to claim 7, wherein one end of the guide chain is connected with the lifting lug through a lifting hook, the other end of the guide chain is an adjusting end, and the adjusting end is connected with a crane lifting point (5).
9. The lifting tool for the high-pressure main valve and the inner valve cover of the adjusting valve of the steam turbine according to claim 1, wherein the first lifting frame (1) and the second lifting frame (2) are respectively connected with the inner valve cover (4) of the high adjusting valve and the inner valve cover of the high main valve through bolts.
10. The lifting tool for the high-pressure main throttle valve and the inner valve cover of the adjusting valve of the steam turbine as claimed in claim 9, wherein the side surfaces of the free ends of the first hanger (1) and the second hanger (2) are respectively provided with through holes for connecting and installing the inner valve cover (4) of the high adjusting valve and the inner valve cover of the high main valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121167956.2U CN217838111U (en) | 2021-05-28 | 2021-05-28 | Steam turbine high pressure main valve and adjusting valve inner valve cover lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121167956.2U CN217838111U (en) | 2021-05-28 | 2021-05-28 | Steam turbine high pressure main valve and adjusting valve inner valve cover lifting device |
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| Publication Number | Publication Date |
|---|---|
| CN217838111U true CN217838111U (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121167956.2U Active CN217838111U (en) | 2021-05-28 | 2021-05-28 | Steam turbine high pressure main valve and adjusting valve inner valve cover lifting device |
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| CN (1) | CN217838111U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113213332A (en) * | 2021-05-28 | 2021-08-06 | 华能（上海）电力检修有限责任公司 | Hoisting tool and method for high-pressure main valve and inner valve cover of adjusting valve of steam turbine |
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2021
- 2021-05-28 CN CN202121167956.2U patent/CN217838111U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113213332A (en) * | 2021-05-28 | 2021-08-06 | 华能（上海）电力检修有限责任公司 | Hoisting tool and method for high-pressure main valve and inner valve cover of adjusting valve of steam turbine |
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