CN114323630A - Special tool for blue oil test of parallel gate valve seat - Google Patents
Special tool for blue oil test of parallel gate valve seat Download PDFInfo
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- CN114323630A CN114323630A CN202011079268.0A CN202011079268A CN114323630A CN 114323630 A CN114323630 A CN 114323630A CN 202011079268 A CN202011079268 A CN 202011079268A CN 114323630 A CN114323630 A CN 114323630A
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- valve
- oil test
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 210000004907 gland Anatomy 0.000 claims description 6
- 210000000078 claw Anatomy 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 20
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000007689 inspection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 101001017827 Mus musculus Leucine-rich repeat flightless-interacting protein 1 Proteins 0.000 description 2
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- 241000196324 Embryophyta Species 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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Abstract
This patent belongs to nuclear power and overhauls the field, concretely relates to a specialized tool that is used for parallel gate valve disk seat blue oil experimental. At present, no proper special tool can be used for checking the quality of a ground valve seat sealing surface, the quality can be judged only by the experience of maintenance personnel, the uncertainty factor is large, the maintenance quality is difficult to control, and the condition of valve internal leakage often occurs after the system is put into operation. The whole valve seat of the device is a horizontal pipe upper connecting flange, and the inside of the horizontal pipe comprises a valve clack and a three-jaw chuck; the three-jaw chuck is connected with the lower dowel bar through a ball head; the lower force transmission rod is fixedly connected with the upper force transmission rod, and the upper force transmission rod penetrates through the base; the base is divided into an upper layer of circular ring and a lower layer of circular ring, the circular rings are fixedly connected through columns, and the lower layer of circular ring is connected with the valve seat flange through four screw rods. This patent device simple structure, convenient to use can carry out blue oil test to parallel gate valve disk seat with the help of it to accurate sealed face grinding quality of disk seat of judging.
Description
Technical Field
This patent belongs to nuclear power and overhauls the field, concretely relates to a specialized tool that is used for parallel gate valve disk seat blue oil experimental.
Background
The parallel gate valves are widely applied to various systems of nuclear power plants due to the advantages of small fluid resistance, small torque required for opening and closing, small erosion of a sealing surface by media during opening and the like, for example, a two-loop emergency water supply system of the Qin-II plant, the parallel gate valves are mostly used in key positions, the valves belong to nuclear secondary equipment, and the valve clacks and the valve seats are reliably sealed so as to ensure the nuclear safety. The parallel gate valve has small valve cavity, small distance between the inlet and outlet sealing surfaces and no space for quality inspection and confirmation after grinding the valve seat. The grinding quality of the sealing surface depends on the hand feeling of maintenance personnel, and misjudgment is easily caused, so that the valve clack/valve seat sealing is invalid.
The tool for checking and confirming the grinding quality of the valve seat sealing surface of the parallel gate valve is designed and researched, the quality of the ground valve seat sealing surface is accurately judged through a blue oil test, and the valve sealing reliability can be guaranteed.
The special tool has the innovation points that:
1. the valve seat of the parallel gate valve can also be used for blue oil test, so that the quality of the sealing surface of the valve seat after grinding can be accurately judged.
2. The special tool is simple and reliable in structural design and convenient to use.
The parallel gate valve is widely applied to various important positions of a nuclear power plant, some valves are even nuclear-grade equipment, the valves are overhauled, a unit needs to be in a shutdown state, and the overhauling quality and the overhauling construction period have extremely important significance for the production benefit of the nuclear power plant.
Due to the special structure of the parallel gate valve, the span between the sealing surfaces of the valve seats is narrow, and is generally within 100 mm. At present, no proper special tool can check the quality of the ground valve seat sealing surface, and the quality can be judged only by the experience of maintenance personnel, so that the uncertainty factor is large. In each overhaul of Qin and II factories, parallel gate valves are disassembled for inspection, the inspection quality is difficult to control, and the condition of internal leakage of the valves often occurs after the system is put into operation.
Therefore, in the face of the practical situation, a set of special tool suitable for the blue oil test of the valve seat sealing surface of the parallel gate valve needs to be designed and researched urgently, the quality of the valve sealing surface after the maintenance is accurately judged, and the special tool has important significance for the maintenance work of the parallel gate valve.
Disclosure of Invention
1. The purpose is as follows:
the problem of the sealed face grinding quality of parallel gate valve disk seat can't be accurately judged in the actual work is solved.
2. The technical scheme is as follows:
a special tool for blue oil test of a parallel gate valve seat is characterized in that the whole valve seat is a horizontal pipe upper connecting flange, and a valve clack and a three-jaw chuck are arranged in the horizontal pipe; the three-jaw chuck is connected with the lower dowel bar through a ball head; the lower force transmission rod is fixedly connected with the upper force transmission rod, and the upper force transmission rod penetrates through the base; the base is divided into an upper layer of circular ring and a lower layer of circular ring, the circular rings are fixedly connected through columns, and the lower layer of circular ring is connected with the valve seat flange through four screw rods.
The middle part of the upper force transmission rod is fixedly connected with a positioning rod; the upper part of the upper force transmission rod is fixedly connected with a force application rod; the upper force transmission rod, the positioning rod and the force application rod are mutually vertical.
The claw screw on the three-jaw chuck can be adjusted.
The base on have the arc hole, can follow circumference slip, the angle of valve clack and disk seat is adjusted through the circular port.
The base on be provided with the slide rail, the slider is installed on the slide rail, respectively has an adjusting bolt around every slider.
The stress application rod penetrates through the center of the upper part of the fixing frame; the lower end of the fixing frame is fixedly connected with the upper ring of the base through bolts.
The bolt on the screw rod can be adjusted up and down; the screw rod upper portion bolt can lock the base.
3. The effect is as follows:
this patent device simple structure, convenient to use can carry out blue oil test to parallel gate valve disk seat with the help of it to accurate sealed face grinding quality of disk seat of judging.
Drawings
FIG. 1 is a drawing of a blue oil test tool for a parallel gate valve
In the figure: 1. a valve flap; 2. a three-jaw chuck; 3. a nail of goat's horn; 4. a lower dowel bar; 5. an upper force transmission rod; 6. a screw; 7. a base; 8. a slider; 9. a slide block gland; 10. positioning a rod; 11. a fixed mount; 12. a stressing rod; 13. adjusting the bolt; 14. a valve seat.
Detailed Description
The core of this patent lies in two aspects:
firstly, realizing accurate centering of a valve clack and a valve seat;
secondly, the problems of clamping and stressing of the valve clack 1 in a narrow space blue oil test are solved.
This is explained below with reference to fig. 1.
a) Centering of the flap 1 and the valve seat 14
As shown in fig. 1, the device for mounting the valve flap 1 is adjustable in all directions:
firstly, the claw screw 3 on the three-jaw chuck 2 can be adjusted so as to fix valve clacks with different sizes, and the three-jaw chuck (2) is linked with the lower dowel bar 4 through a ball head and can rotate along any direction, so that the pressure of a blue oil test is automatically centered;
secondly, an arc-shaped hole is formed in the base 7 and can slide along the circumferential direction, so that the angle between the valve clack 1 and the valve seat 14 is adjusted; the base 7 is connected with the valve seat flange through four screw rods 6, and bolts on the screw rods 6 can be adjusted up and down, so that the up-down height of the valve clack 1 can be adjusted. After the up-down position and the angle position are adjusted, the base 7 is locked by the bolt on the upper part of the screw 6;
the left and right positions of the valve clack 1 are adjusted through a positioning rod 10, and the valve clack 1 is locked by a nut after being adjusted to a proper position through rotating a handle on the positioning rod 10 so as to avoid position movement;
fourthly, the valve clack 1 and the valve seat 14 are left at a certain distance from each other, and the sliding block is adjusted to a proper position through the adjusting bolt 13. The base 7 is provided with a slide rail, the slide blocks 8 are arranged on the slide rail, and the front and the back of each slide block are respectively provided with an adjusting bolt 13 which can adjust the position of the slide block.
b) Valve clack stress application in blue oil test
The valve clack stress application of the blue oil test is realized by a lever principle, and external force is applied to the valve clack 1 by rotating a handle of a stress application rod 12. The contact point of the force application rod 12 and the upper force application rod 5 is a spherical surface, so that the upper force application rod 5 is prevented from inclining due to the rotation of the force application rod 12 in the force application process. The three-jaw chuck 2 is connected with the lower dowel bar 4 through a ball head, and the valve clack can be automatically centered under stress in the stress application process. The vertical position of the fixing frame 11 can be adjusted to ensure that the contact point of the stress application rod 12 and the upper stress application rod 5 is aligned, so that the stress application rod 12 applies force to the upper stress application rod 5 in the positive direction.
The specific operation steps are as follows:
measuring the distance from the center of the valve seat 14 to the flange surface, uniformly installing 4 screw rods 6 on the flange of the valve seat 14, and preliminarily adjusting the nuts to proper positions;
the valve clack 1 is arranged on a three-jaw chuck 2 and fixed through a claw screw 3;
a lower force transmission rod 4 and an upper force transmission rod 5 are connected (in threaded connection), and blue oil is uniformly coated on the sealing surface of the valve clack 1;
installing a positioning rod 10 on the upper surface of the upper dowel bar 5, taking down the slide block gland 9, installing the assembled tool on the slide block 8, reinstalling the slide block gland 9, and screwing a bolt on the slide block gland 9;
and adjusting a nut on the screw rod 6 to enable the upper part and the lower part of the sealing surface of the valve clack 1 and the valve seat 14 to be at proper positions, and rotating the base 7 along the circumferential direction to enable the sealing surface of the valve clack 1 and the valve seat 14 to be at parallel positions. After the adjustment is completed, the nut at the upper part of the screw 6 is rotated to fix the position of the base 7;
rotating a handle on the positioning rod 10, adjusting the left and right positions of the valve clack 1 to center the valve clack, and screwing a nut on the positioning rod 10 after the valve clack is adjusted;
adjusting the front and back positions of the valve clack 1 relative to the sealing surface of the valve seat 14, and controlling by rotating an adjusting bolt 13 until the two sealing surfaces of the valve clack 1 and the valve seat 14 are just contacted;
mounting a fixed frame 11 and adjusting the height of the fixed frame to ensure that the small balls on the stress application rod 12 are right opposite to the center of the arc-shaped surface on the upper force transmission rod 5;
rotating the handle on the stress application rod 12, applying external force, and performing a blue oil test;
after the blue oil test is finished, the handle of the forcing rod 12 is rotated in the opposite direction to a proper position, and the bolt 13 is properly adjusted, so that a gap is reserved between the sealing surface of the valve clack 1 and the valve seat 14;
the slide block gland 9 is detached, the valve clack 1 is lifted upwards, and the blue oil test result is checked;
when the blue oil test of the sealing surface on the other side of the valve seat is carried out, the fixing frame is installed on the other side (the base is provided with the bolt hole), and the rest operation method is the same as the steps in the prior art.
Claims (7)
1. The utility model provides a specialized tool that is used for blue oil test of parallel gate valve disk seat which characterized in that: the valve seat (14) is integrally a horizontal pipe upper connecting flange, and the inside of the horizontal pipe comprises a valve clack (1) and a three-jaw chuck (2); the three-jaw chuck (2) is connected with the lower dowel bar (4) through a ball head; the lower dowel bar (4) is fixedly connected with the upper dowel bar (5), and the upper dowel bar (5) penetrates through the base (7); the base (7) is divided into an upper layer of circular ring and a lower layer of circular ring, the circular rings are fixedly connected through a column, and the lower layer of circular ring is connected with the valve seat flange through four screw rods (6).
2. The special tool for blue oil test of the valve seat of the parallel gate valve according to claim 1, is characterized in that: the middle part of the upper force transmission rod (5) is fixedly connected with a positioning rod (10); the upper part of the upper force transmission rod (5) is fixedly connected with a force application rod (12); the upper force transmission rod (5), the positioning rod (10) and the stress application rod (12) are mutually vertical.
3. The special tool for blue oil test of the valve seat of the parallel gate valve according to claim 1, is characterized in that: the claw screw (3) on the three-jaw chuck (2) can be adjusted.
4. The special tool for blue oil test of the valve seat of the parallel gate valve according to claim 1, is characterized in that: the base (7) on have the arc hole, can follow circumference slip, the angle of valve clack (1) and disk seat (14) is adjusted through the circular port.
5. The special tool for blue oil test of the valve seat of the parallel gate valve according to claim 1, is characterized in that: the base (7) on be provided with the slide rail, slider (8) are installed on the slide rail, each has an adjusting bolt (13) around every slider, fixed mounting slider gland (9) on slider (8).
6. The special tool for blue oil test of the valve seat of the parallel gate valve according to claim 1, is characterized in that: the stress application rod (12) penetrates through the center of the upper part of the fixed frame (11); the lower end of the fixed frame (11) is fixedly connected with the upper ring of the base (7) through bolts.
7. The special tool for blue oil test of the valve seat of the parallel gate valve according to claim 1, is characterized in that: the bolt on the screw rod (6) can be adjusted up and down; the base (7) can be locked by the bolt at the upper part of the screw rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079268.0A CN114323630B (en) | 2020-10-10 | 2020-10-10 | Special tool for parallel gate valve seat blue oil test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079268.0A CN114323630B (en) | 2020-10-10 | 2020-10-10 | Special tool for parallel gate valve seat blue oil test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114323630A true CN114323630A (en) | 2022-04-12 |
| CN114323630B CN114323630B (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011079268.0A Active CN114323630B (en) | 2020-10-10 | 2020-10-10 | Special tool for parallel gate valve seat blue oil test |
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| CN201198902Y (en) * | 2008-04-29 | 2009-02-25 | 陈崇南 | Parallel double-valve petal gate valve |
| CN102922465A (en) * | 2011-08-11 | 2013-02-13 | 中电华元核电工程技术有限公司 | Detaching device for electric three-way water supply valve of nuclear power plant |
| CN103104795A (en) * | 2013-01-06 | 2013-05-15 | 合肥通用机械研究院 | Torque balance lifting and clamping device for valve low-temperature test |
| CN203670843U (en) * | 2013-12-19 | 2014-06-25 | 刘伟 | Double-clip type double sealing vacuum flat gate valve |
| CN205446771U (en) * | 2016-02-25 | 2016-08-10 | 曲德湖 | Run -in butt clamp disk seat flashboard subassembly and contain slide valve of this disk seat flashboard subassembly |
| CN206056895U (en) * | 2016-09-23 | 2017-03-29 | 广东核电合营有限公司 | Nuclear power station parallel gate valve leak tightness test device |
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| US20200109999A1 (en) * | 2017-06-30 | 2020-04-09 | Kitz Corporation | Apparatus for valve-seat inspection and pressure-resistance inspection for valves, and valve |
| CN111307443A (en) * | 2020-01-09 | 2020-06-19 | 中国矿业大学 | Method for testing opening of breather valve |
-
2020
- 2020-10-10 CN CN202011079268.0A patent/CN114323630B/en active Active
Patent Citations (11)
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|---|---|---|---|---|
| US20020148521A1 (en) * | 2001-04-11 | 2002-10-17 | Condon Duane R. | Method and apparatus for pressure testing pipe lines |
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| CN102922465A (en) * | 2011-08-11 | 2013-02-13 | 中电华元核电工程技术有限公司 | Detaching device for electric three-way water supply valve of nuclear power plant |
| CN103104795A (en) * | 2013-01-06 | 2013-05-15 | 合肥通用机械研究院 | Torque balance lifting and clamping device for valve low-temperature test |
| CN203670843U (en) * | 2013-12-19 | 2014-06-25 | 刘伟 | Double-clip type double sealing vacuum flat gate valve |
| CN205446771U (en) * | 2016-02-25 | 2016-08-10 | 曲德湖 | Run -in butt clamp disk seat flashboard subassembly and contain slide valve of this disk seat flashboard subassembly |
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| CN111307443A (en) * | 2020-01-09 | 2020-06-19 | 中国矿业大学 | Method for testing opening of breather valve |
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| CN114323630B (en) | 2024-01-12 |
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