CN210064889U - Horizontal high-pressure main steam valve dismounting tool - Google Patents
Horizontal high-pressure main steam valve dismounting tool Download PDFInfo
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- CN210064889U CN210064889U CN201920811159.XU CN201920811159U CN210064889U CN 210064889 U CN210064889 U CN 210064889U CN 201920811159 U CN201920811159 U CN 201920811159U CN 210064889 U CN210064889 U CN 210064889U
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- 238000000034 method Methods 0.000 claims abstract description 15
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- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 abstract description 25
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- 230000008569 process Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
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Abstract
The utility model discloses a horizontal high pressure main steam valve assembly and disassembly tools, including the fixed first rings that set up on main steam valve gap lateral wall top, the one end that the main steam valve gap did not set up the main steam valve case is connected and is provided with the balanced hoisting structure who is used for balanced main steam valve whole weight in order to guarantee that the main steam valve case is in the horizontality and then the main steam valve of being convenient for dismantles at the hoist and mount in-process, and balanced hoisting structure's top is provided with the second rings that carry out the hoist and mount to the main steam valve with first rings combined action. The utility model discloses overhaul on-the-spot high pressure main steam valve case focus characteristics and on-the-spot space according to large-scale turbo generator set and actually make, can be when dismantling, installing large-scale turbo generator set's horizontal high pressure main steam valve, the focus of the main steam valve case of balanced power plant series keeps the level of hoist and mount main steam valve case, has avoided hoisting point and the inconsistent dismouting difficulty that causes the skew arouse of alloy bolt hole of main steam valve case focus.
Description
Technical Field
The utility model relates to a large-scale turbo generator set overhauls technical field, especially a horizontal high pressure main steam valve assembly and disassembly tools.
Background
The large-scale steam turbine generator unit is generally provided with two high-pressure main steam valves which are arranged in bilateral symmetry, the high-pressure main steam valves are first valves for high-temperature high-pressure steam to enter a steam turbine, and most of the high-pressure steam valves are operated in a horizontal position. The main steam valve comprises a main steam valve cover, a main steam valve core and a main steam valve rod connecting sleeve. The valve core of the main steam valve is connected with the valve body of the steam chamber by a plurality of alloy bolts, and the valve body of the steam chamber and the steam chamber are cast into a whole. The high-pressure main steam valve is a main part of a steam turbine protection system, and all shutdown protection of the steam turbine is finally realized by closing the main steam valve and the regulating steam valve, so that the main steam valve needs to be disassembled and overhauled every time the unit is overhauled.
In the actual process of removing the valve core of the main steam valve, the valve core of the main steam valve is removed, firstly, the automatic closing device of the main steam valve is removed, the air leakage flange of the high-low pressure valve rod is loosened, and then, the nut of the high-pressure connecting bolt is completely removed. At the moment, a gantry crane is adopted to hang a hanging ring on a valve cover of the main steam valve, three jackscrews are adopted to uniformly apply force, so that a gap is formed between a valve core of the main steam valve and a valve body of a steam chamber, and the gantry crane walks while tightly jacking the jackscrews.
Due to the arrangement and structural particularity of the main steam valve, the gap between an alloy bolt hole (namely a valve cover bolt hole of the main steam valve) and an alloy bolt thread is small, the valve cover of the main steam valve is thick, the gap is difficult to keep uniform in the dismounting process, the alloy bolt and the alloy bolt hole are easy to be held back, time and labor are wasted, the alloy bolt thread is easy to be damaged by pulling, the alloy bolt thread is scrapped or a sealing gasket is damaged, only the damaged alloy bolt can be dismounted, and a new alloy bolt is mounted, for example, a certain 600MW supercritical unit is provided, each unit is provided with 2 high-pressure main steam valves, the main steam inlet parameter is 24.2MPa, the temperature is 538 ℃, each valve cover of the main steam valve is provided with 16M 72 pieces of R26 alloy bolts, the price of each alloy bolt is about four-five ten thousand yuan, and the scrapping of the alloy bolts brings about unwarrangeable economic.
After the valve core of the main steam valve is removed, the valve core of the main steam valve is not in a horizontal state due to the structural reason of the main steam valve when the gantry crane is used for hanging, and the structure is shown in a combined figure 2. Therefore, the main steam valve is adjusted by a steel wire rope and a guide chain in the process of dismounting, and as shown in the combined figure 3, the process cannot accurately control the level at all, which is the root cause of time and labor waste and damage to alloy bolt threads.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a horizontal high pressure main steam valve assembly and disassembly tools to solve current main steam valve case and cause the damage easily to the alloy bolt at the dismouting in-process and bring economic loss and the problem that wastes time and energy, with the degree of difficulty that reduces the dismouting, the focus of balanced main steam valve makes the dismouting of high pressure main steam valve more convenient, guarantees that the alloy bolt can not be impaired at the dismouting in-process.
In order to solve the technical problem, the utility model adopts the following technical proposal.
The utility model provides a horizontal high pressure main steam valve assembly and disassembly tools, is including the fixed first rings that set up on main steam valve gap lateral wall top, the one end connection that the main steam valve gap did not set up the main steam valve case is provided with and is used for the whole weight of balanced main steam valve in order to guarantee that the main steam valve case is in the balanced hoisting structure that the horizontality and then the main steam valve of being convenient for was dismantled at the hoist and mount in-process, and the top of balanced hoisting structure is provided with and carries out the second rings of hoist and mount to the main steam valve with first rings combined action.
Further optimize technical scheme, balanced hoisting structure includes the ring flange that is connected through connecting bolt and main steam valve gap, with ring flange fixed connection and make the cavity steel pipe that main steam valve rod adapter sleeve passed and set up the main balance plate that is used for balanced main steam valve whole weight in order to guarantee hoist and mount focus position in cavity steel pipe one end, the fixed top that sets up at main balance plate of second rings.
Further optimizing the technical scheme, the side wall of the main balance disc is provided with a fine adjustment balance block for fine adjustment of the weight of the main balance disc through a screw.
According to the technical scheme, the inner diameter of the hollow steel pipe is larger than the outer diameter of the main steam valve stem connecting sleeve.
Further optimizing the technical scheme, the main balance disc is a thick steel plate or an iron casting.
According to the technical scheme, the outer diameter of the main balance disc is smaller than or equal to that of the valve cover of the main steam valve.
Further optimize technical scheme, balanced hoisting structure's top level is provided with and is used for detecting whether balanced hoisting structure and main steam valve are in the horizontality in order to reach the accurate balanced hoist and mount purpose of main steam valve horizontal detection mechanism.
According to the technical scheme, the horizontal detection mechanism comprises a level device fixing plate and a level device, wherein the level device fixing plate is fixedly arranged above the hollow steel pipe, the top end face of the level device fixing plate is in a horizontal state, and the level device is horizontally and fixedly arranged on the top end face of the level device fixing plate.
According to the technical scheme, the length of the balance hoisting structure is smaller than the difference value between the distance between the valve cover of the main steam valve and the low-pressure cylinder and the length of the valve core of the main steam valve.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model discloses overhaul on-the-spot high pressure main steam valve case focus characteristics and on-the-spot space according to large-scale turbo generator set and actually make, can be in the dismantlement, during the horizontal high pressure main steam valve of installation large-scale turbo generator set, the focus of balanced power plant series main steam valve case, keep the level of hoist and mount main steam valve case, avoided hoisting point and the inconsistent problem that causes the crooked dismouting difficulty that arouses of alloy bolt hole that causes of main steam valve case focus, the condition of very easily causing valuable high temperature has been avoided, high-pressure alloy bolt thread damage, a large amount of man-hours and the maintenance cost of overhauing have been saved, the maintenance quality has been improved, the potential safety hazard of the high temperature high pressure steam leakage that the sealed inefficacy that brings or the tight power is not enough because of high-pressure alloy bolt thread strain damage has been eliminated, and the economic benefits.
The utility model discloses balanced hoisting structure and main steam valve gap fixed connection, and be provided with the second rings on balanced hoisting structure's top, accessible longmen driving lifts by crane first rings and second rings simultaneously, balanced hoisting structure's weight can be decided according to the actual weight of main steam valve, and then can guarantee effectively that main steam valve can be in the horizontality when main steam valve lifts by crane, and then avoided alloy bolt screw thread damage and seal gasket when dismouting alloy bolt to flatten impaired condition.
The utility model discloses the setting of fine setting balancing piece can play fine motion regulation's effect to the weight of main balance dish, and then guarantees that the main steam valve can be in the horizontality when the hoist.
The utility model discloses whether level detection mechanism that sets up at balanced hoisting structure's top level can detect balanced hoisting structure and main steam valve is in the horizontality to reach the accurate balanced hoist and mount purpose of main steam valve, and then be convenient for adjust the change to the fine setting balancing piece of different weights.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a main steam valve with a valve core removed in the prior art;
fig. 3 is a schematic structural view of adjustment by a steel wire rope and a guide chain in the main steam valve dismounting process.
Wherein: 1. the main steam valve rod connecting sleeve comprises a main steam valve rod connecting sleeve body, 2, a screw, 3, a fine adjustment balancing block, 4, a main balancing disc, 5, a first lifting ring, 6, a hollow steel pipe, 7, a connecting bolt, 8, a flange plate, 9, an alloy bolt hole, 10, a second lifting ring, 11, a sealing gasket, 12, a main steam valve core, 13, a fillet weld, 14, a low pressure cylinder, 15, a main steam valve cover, 16, a level fixing plate, 17, a level, 18 and a steam chamber valve body.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
A horizontal high-pressure main steam valve dismounting tool is shown in a combined figure 1 and comprises a first hanging ring 5, a balance hoisting structure and a second hanging ring 10.
The first hanging ring 5 is fixedly arranged at the top end of the side wall of the main steam valve cover 15. The second lifting ring 10 is arranged at the top end of the balance lifting structure and is used for lifting the main steam valve under the combined action of the first lifting ring 5.
The balance hoisting structure is connected and arranged at one end, not provided with the main steam valve core 12, of the main steam valve cover 15 and used for balancing the whole weight of the main steam valve so as to ensure that the main steam valve core 12 is in a horizontal state in the hoisting process and further facilitate the disassembly of the main steam valve.
The balance hoisting structure comprises a flange plate 8, a hollow steel pipe 6 and a main balance disc 4.
The flange 8 is connected with a main steam valve cover 15 through a connecting bolt 7. Before the flange plate 8 is connected, the connecting bolt 7 is used for connecting the main steam valve automatic closer and the main steam valve, and the proper flange plate 8 is processed by utilizing the position of the connecting bolt 7.
The hollow steel pipe 6 is fixedly connected with the flange plate 8, the hollow steel pipe 6 is welded at the center of the flange plate 8, the inner diameter of the hollow steel pipe 6 is larger than the outer diameter of the main steam valve rod connecting sleeve 1, and particularly the inner diameter of the hollow steel pipe 6 is slightly larger than the outer diameter of the main steam valve rod connecting sleeve 1, so that the main steam valve rod connecting sleeve 1 penetrates through the hollow steel pipe.
The main balance disc 4 is arranged at one end of the hollow steel pipe 6 and used for balancing the whole weight of the main steam valve so as to ensure that the hoisting gravity center position is positioned between the main steam valve cover 15 and the main balance disc 4, and the weight of the main balance disc 4 is determined by the horizontal bearing state of the main steam valve core 12 after the first hoisting ring 5 and the second hoisting ring 10 are hoisted. Specifically, the main balance disc 4 and the hollow steel pipe 6 are welded to each other. The main balance disc 4 is a thick steel plate or an iron casting. The outer diameter of the main balance disc 4 is less than or equal to the outer diameter of the main steam valve cover 15. The second hanging ring 10 is fixedly arranged at the top end of the main balance disc 4.
In order to further ensure that the valve core 12 of the main steam valve is in a horizontal state in the hoisting process, a fine adjustment balance block 3 is arranged on the side wall of the main balance disc 4 through a screw 2, the fine adjustment balance block 3 is used for fine adjustment of the weight of the main balance disc 4, and the whole weight of the main balance disc 4 and the fine adjustment balance block 3 can be adjusted by replacing the fine adjustment balance blocks 3 with different weights. The weight of the fine adjustment balance block 3 can be configured and numbered according to the actual conditions of different main steam valves of the power plant.
Whether be in the horizontality in order to detect balanced hoisting structure and main steam valve to reach the accurate balanced hoist and mount purpose of main steam valve, and then be convenient for adjust the change to the fine setting balancing piece 3 of different weights, the utility model discloses top level at balanced hoisting structure is provided with level detection mechanism. The level detection mechanism includes a level fixing plate 16 and a level 17. The level fixing plate 16 is fixedly arranged above the hollow steel pipe 6, the top end surface of the level fixing plate is in a horizontal state, and the level 17 is horizontally and fixedly arranged on the top end surface of the level fixing plate 16. In addition, the level fixing plate 16 and the level 17 may be disposed at other positions.
The utility model provides a spirit level 17 is the cylinder spirit level, and inside is provided with balanced bubble, and whether bubble through confirming among the spirit level 17 is in the centre, confirms whether balanced hoisting structure and main steam valve are in horizontal position. If the air bubble in the level device 17 is in the middle, the balance hoisting structure and the main steam valve are in a horizontal state; if the air bubbles are on the left side, namely, are deviated to one side of the balance hoisting structure, the weight of the balance hoisting structure needs to be reduced; if the air bubble is on the right side, i.e. is deviated to one side of the main steam valve, the weight of the balance hoisting structure needs to be increased.
The utility model discloses the method of carrying out horizontal high pressure main steam valve dismouting is as follows.
The method comprises the steps of firstly, dismantling the automatic main steam valve closer, manufacturing a flange 8 of a main steam valve disassembling tool according to the position and the size of a connecting bolt 7 of the automatic main steam valve closer, wherein the size of the flange 8 is determined according to the position and the size of the connecting bolt 7.
And secondly, measuring the outer diameter of the main steam valve rod connecting sleeve 1, selecting a hollow steel pipe 6 with a proper inner diameter, sleeving the hollow steel pipe on the main steam valve rod connecting sleeve 1, and welding and fixing the hollow steel pipe and the flange plate 8.
Thirdly, welding a main balance disc 4 at one end of the hollow steel pipe 6, wherein the weight of the main balance disc 4 is determined by the horizontal state of a main steam valve core 12 after the first hanging ring 5 and the second hanging ring 10 are hung.
And fourthly, installing and setting the fine adjustment balance block 3 on the main balance disc 4 through the screw 2, wherein the fine adjustment balance block 3 can be configured and numbered according to the actual conditions of different main steam valves of different units of the power plant.
And fifthly, the length of the main steam valve dismounting tool is manufactured according to the actual space on site, and the main steam valve core 12 is required not to touch surrounding equipment facilities, such as the low pressure cylinder 14, in the dismounting process. The length of the balance hoisting structure is set to be L, the distance between the main steam valve cover 15 and the low pressure cylinder 14 is set to be L1, and the length of the main steam valve core 12 is set to be L2. The length of the balance hoisting structure is smaller than the difference between the distance between the main steam valve cover 15 and the low pressure cylinder 14 and the length of the main steam valve core 12, namely L < L1-L2.
And sixthly, the gantry crane is adopted to hoist the main steam valve and the main steam valve dismounting tool simultaneously, the main steam valve can be ensured to be in a horizontal position during hoisting, the alloy bolt can be conveniently dismounted from the alloy bolt hole 9 on the valve cover 15 of the main steam valve, the alloy bolt cannot be damaged during dismounting, and the sealing gasket 11 cannot be damaged due to partial pressure.
Claims (9)
1. The utility model provides a horizontal high pressure main steam valve assembly and disassembly tools, includes fixed first rings (5) that set up on main steam valve gap (15) lateral wall top, its characterized in that: the main steam valve bonnet (15) do not set up the one end connection of main steam valve case (12) and be provided with the balanced hoisting structure that is used for balanced main steam valve whole weight in order to guarantee that main steam valve case (12) are in the horizontality and then the main steam valve of being convenient for is dismantled at hoist and mount in-process, and the top of balanced hoisting structure is provided with and carries out second rings (10) hoisted main steam valve with first rings (5) combined action.
2. The horizontal high-pressure main steam valve dismounting tool according to claim 1, characterized in that: balanced hoisting structure includes ring flange (8) that are connected through connecting bolt (7) and main steam valve gap (15), with ring flange (8) fixed connection and make cavity steel pipe (6) that main steam valve rod adapter sleeve (1) passed and set up and be used for balancing main steam valve whole weight in order to guarantee main balance plate (4) of hoist and mount focus position in cavity steel pipe (6) one end, second rings (10) are fixed to be set up on the top of main balance plate (4).
3. The horizontal high-pressure main steam valve dismounting tool according to claim 2, characterized in that: and a fine adjustment balance block (3) for fine adjustment of the weight of the main balance disc (4) is arranged on the side wall of the main balance disc (4) through a screw (2).
4. The horizontal high-pressure main steam valve dismounting tool according to claim 2, characterized in that: the inner diameter of the hollow steel pipe (6) is larger than the outer diameter of the main steam valve stem connecting sleeve (1).
5. The horizontal high-pressure main steam valve dismounting tool according to claim 2, characterized in that: the main balance disc (4) is a thick steel plate or an iron casting.
6. The horizontal high-pressure main steam valve dismounting tool according to claim 2, characterized in that: the outer diameter of the main balance disc (4) is less than or equal to the outer diameter of the valve cover (15) of the main steam valve.
7. The horizontal high-pressure main steam valve dismounting tool according to claim 2, characterized in that: the top level of balanced hoisting structure is provided with and is used for detecting whether balanced hoisting structure and main steam valve are in the horizontality in order to reach the accurate balanced hoist and mount purpose of main steam valve horizontal detection mechanism.
8. The horizontal high-pressure main steam valve dismounting tool according to claim 7, characterized in that: the level detection mechanism comprises a level device fixing plate (16) which is fixedly arranged above the hollow steel pipe (6) and the top end surface of which is in a horizontal state, and a level device (17) which is horizontally and fixedly arranged on the top end surface of the level device fixing plate (16).
9. The horizontal high-pressure main steam valve dismounting tool according to claim 1, characterized in that: the length of the balance hoisting structure is smaller than the difference between the distance between the valve cover (15) of the main steam valve and the low pressure cylinder (14) and the length of the valve core (12) of the main steam valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920811159.XU CN210064889U (en) | 2019-05-31 | 2019-05-31 | Horizontal high-pressure main steam valve dismounting tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920811159.XU CN210064889U (en) | 2019-05-31 | 2019-05-31 | Horizontal high-pressure main steam valve dismounting tool |
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| CN210064889U true CN210064889U (en) | 2020-02-14 |
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| CN201920811159.XU Active CN210064889U (en) | 2019-05-31 | 2019-05-31 | Horizontal high-pressure main steam valve dismounting tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110077949A (en) * | 2019-05-31 | 2019-08-02 | 河北建投国融能源服务有限公司 | A kind of horizontal high-pressure stop valve dismantling device |
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2019
- 2019-05-31 CN CN201920811159.XU patent/CN210064889U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110077949A (en) * | 2019-05-31 | 2019-08-02 | 河北建投国融能源服务有限公司 | A kind of horizontal high-pressure stop valve dismantling device |
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