CN102749173A - Block valve hydraulic test device - Google Patents
Block valve hydraulic test device Download PDFInfo
- Publication number
- CN102749173A CN102749173A CN2011100954162A CN201110095416A CN102749173A CN 102749173 A CN102749173 A CN 102749173A CN 2011100954162 A CN2011100954162 A CN 2011100954162A CN 201110095416 A CN201110095416 A CN 201110095416A CN 102749173 A CN102749173 A CN 102749173A
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- valve
- valve body
- hydraulic test
- test device
- block valve
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Abstract
The invention discloses a block valve hydraulic test device. A seal structure that an end hydraulic cover compresses an O-shaped seal ring is adopted in a conventional hydraulic test of a block valve, so the final processing of the block valve cannot be finished before the hydraulic test. An allowance of 80-100 millimeters is needed to leave on two sides of a branch pipe, and twenty screwed holes are drilled. When the valve passes the hydraulic test, the reserved allowance on the two sides of the branch pipe is processed to be removed, and is made into a welding groove and then a final assembly of the valve is performed. The block valve hydraulic test device comprises: an end caps (5), a metal pipe (3) passing through a tested valve body (1), two ends of the metal pipe being respectively connected with the end caps which are disposed on two sides through a set of screwed connecting pieces (2), a pressing plate (4) disposed between the end caps and the tested valve body, and a water injection hole (6) drilled on a part of the metal pipe which is in the valve body. The block valve hydraulic test device is used in block valves of subcritical, supercritical, and ultra supercritical fossil power plants.
Description
Technical field:
the present invention relates to a kind of novel water test unit, are specifically related to a kind of stifled valve water test unit.
Background technology:
traditional stifled valve is fetched water and pressed is the hermetically-sealed construction that employing end hydraulic pressure capping compresses " O " RunddichtringO formula, so valve body can not finally machine before the hydraulic testing.Need stay 80 ~ 100 millimeters surplus in the arm both sides, bore 20 threaded holes.After the valve body hydraulic testing was qualified, the surplus that the arm both sides are reserved machined away, and car becomes the final assembling of carrying out valve behind the bevel for welding again.
During
traditional stifled valve body water pressure test for strength, for the arts demand of the hydraulic testing, two side branch need stay very big surplus; Simultaneously; Because stifled valve inside nominal diameter is generally bigger, the contact area of test(ing) medium and hydraulic pressure capping is bigger during the hydraulic testing, and acting force increases thereupon; Requirement of strength to hydraulic pressure capping and coupling bolt is very high; The thickness of capping and the diameter of coupling bolt are all bigger, and this has just caused raw-material significant wastage, have increased production cost greatly; Also increased simultaneously the danger of the hydraulic testing greatly.After the hydraulic testing is qualified, add in the process, workman's operative skill (centering) is had relatively high expectations,, certainly will influence the machining precision of whole valve body in case deviation takes place at machine to two side branch bevel for weldings.
Summary of the invention:
the purpose of this invention is to provide a kind of stifled valve water test unit; Promptly avoided the unnecessary error brought of processing centering 2 times; Reduce processing capacity, reduced the danger of the hydraulic testing, also alleviated the supplied materials weight of valve body forge piece simultaneously.
Above-mentioned purpose realizes through following technical scheme:
The valve water test unit is blocked up in
; Its composition comprises: end cap; Pass the metal tube that is verified valve body; Described metal tube two ends are connected with the described end cap that is positioned at two ends through one group of threaded connector respectively, and described end cap and described being verified are equipped with pressing plate between the valve body, and the part that described metal tube is positioned at described valve body has water injection hole.
described stifled valve water test unit; Described being verified between valve body and the described pressing plate is connected through O-ring seal; Be connected through O-ring seal between described pressing plate and the described end cap, be connected through O-ring seal between described pressing plate or described end cap and the described metal tube.
Beneficial effect:
1. the present invention owing to adopt perforating tube structure; The contact area of test(ing) medium and hydraulic pressure capping is that the annulus area that forms between valve body and the pipe reduces greatly; Test(ing) medium power also reduces thereupon; This just can do coupling bolt smaller, and the hydraulic pressure capping also can be done thinnerly, has saved the manufactured materials of capping.
2. the present invention just have been worked into final size owing to valve body before the hydraulic testing; The unnecessary error of promptly having avoided 2 processing and centering to bring has improved machining precision, and product quality is further improved; Simultaneously can practice thrift machining period, practice thrift production cost greatly.
Work efficiency has been improved because the time that test(ing) medium injects has been shortened in reducing of test(ing) medium packing volume greatly in
3. the present invention.
are in the past hydraulic pressure test fixture 4., because valve body arm two ends need hole and attack the hole, in order to capping to be installed; Therefore, the long surplus of 80-100mm need be reserved in valve body arm two ends, causes the waste of material.The present invention need be at valve body arm two ends processing screw hole, therefore need not reserve surplus, saved material; , save and forge the molded cost, greatly reduce the product cost.
5. the present invention make that the space of the interior filling liquid of valve body is that volume diminishes because pipe penetrates in the valve body, and the requirement of water reduces, faster production, water saving.
are the hydraulic testing mode of the past 6., because the active area of water is big, axial force is big; In the process of test; Bolt has axial deformation under the effect of bigger axial force, water under high pressure very easily ejects, and exists certain danger.Seal request is high.The present invention is owing to penetrate pipe, and it is the annulus area that forms between valve body and the pipe that the active area of water is reduced widely, and axial force reduces greatly, can avoid the ejection of water under high pressure effectively, and the danger of the hydraulic testing is reduced widely; Help guaranteeing safety in production.
Radiographic inspection 7. according to the corresponding standard regulation, will be carried out in the valve arm 200mm in
, for the safety of the hydraulic testing, the threaded hole part of capping is installed, and also need carry out radiographic inspection; And the limited length of once detecting a flaw was carried out the hydraulic testing with former mode like this and just must be carried out the secondary flaw detection.The present invention need not reserve the surplus that capping is used is installed, and just is worked into final size before the hydraulic testing; Therefore the length of detecting a flaw can shorten 1/2, and it is just enough only need once to detect a flaw, and has improved production efficiency, has practiced thrift cost.
Description of drawings:
accompanying drawing 1 is the structural representation of this product.
accompanying drawing 2 is right views of accompanying drawing 1 metal tube.
Embodiment:
Embodiment 1:
a kind of stifled valve water test unit; Its composition comprises: end cap 5; Pass the metal tube 3 that is verified valve body 1; Described metal tube two ends are connected with the described end cap that is positioned at both sides through one group of threaded connector 2 respectively, and described end cap and described being verified are equipped with pressing plate 4 between the valve body, and the part that described metal tube is positioned at described valve body is drilled with water injection hole 6.
Embodiment 2:
Embodiment 1 described stifled valve water test unit; Described being verified between valve body and the described pressing plate is equipped with O-ring seal; Between described pressing plate and the described end cap O-ring seal is housed, between described pressing plate or described end cap and the described metal tube O-ring seal is housed
Embodiment 3:
embodiment 1 described stifled valve water test unit, between described metal tube and the described pressing plate with bolted 8.During use; In valve body to be detected, penetrate a metal tube; The end of metal tube is bored 20 threaded holes and is threaded through this pressing plate 3 and end cap 6 are fixed; Test(ing) medium gets into valve inner through water injection hole 8, realizes forming between valve body and the metal tube sealing in space through " O " RunddichtringO 5 and " O " RunddichtringO 7.
Claims (2)
1. stifled valve water test unit; Its composition comprises: end cap; It is characterized in that: pass the metal tube that is verified valve body; Described metal tube two ends are connected with the described end cap that is positioned at two ends through one group of threaded connector respectively, and described end cap and described being verified are equipped with pressing plate between the valve body, and the part that described metal tube is positioned at described valve body has water injection hole.
2. stifled valve water test unit according to claim 1; It is characterized in that: described being verified between valve body and the described pressing plate is connected through O-ring seal; Be connected through O-ring seal between described pressing plate and the described end cap, be connected through O-ring seal between described pressing plate/described end cap and the described metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110095416.2A CN102749173B (en) | 2011-04-17 | 2011-04-17 | Stifled valve water test unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110095416.2A CN102749173B (en) | 2011-04-17 | 2011-04-17 | Stifled valve water test unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102749173A true CN102749173A (en) | 2012-10-24 |
| CN102749173B CN102749173B (en) | 2015-10-07 |
Family
ID=47029542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110095416.2A Active CN102749173B (en) | 2011-04-17 | 2011-04-17 | Stifled valve water test unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102749173B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702859A (en) * | 2017-11-25 | 2018-02-16 | 山西江淮重工有限责任公司 | A kind of body strength experiment closure frock |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799500A (en) * | 1972-07-06 | 1974-03-26 | Mueller Co | Rotary valve with anti-corrosion and torque controlling means |
| CN2175420Y (en) * | 1993-10-09 | 1994-08-24 | 开封高压阀门厂 | Device for measuring valve pressure |
| CN1523255A (en) * | 2003-09-11 | 2004-08-25 | 温州市飞球电站阀门制造有限公司 | Electric power driven hydrostatic test block valve for thermal power generation |
| CN101294860A (en) * | 2008-06-16 | 2008-10-29 | 濮阳市中拓管道清洗修复工程有限公司 | Quality detecting method for inner lining old pipe |
-
2011
- 2011-04-17 CN CN201110095416.2A patent/CN102749173B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799500A (en) * | 1972-07-06 | 1974-03-26 | Mueller Co | Rotary valve with anti-corrosion and torque controlling means |
| CN2175420Y (en) * | 1993-10-09 | 1994-08-24 | 开封高压阀门厂 | Device for measuring valve pressure |
| CN1523255A (en) * | 2003-09-11 | 2004-08-25 | 温州市飞球电站阀门制造有限公司 | Electric power driven hydrostatic test block valve for thermal power generation |
| CN101294860A (en) * | 2008-06-16 | 2008-10-29 | 濮阳市中拓管道清洗修复工程有限公司 | Quality detecting method for inner lining old pipe |
Non-Patent Citations (4)
| Title |
|---|
| 卢合奎等: "水压试验堵阀", 《通用机械》 * |
| 张娜等: "水压试验阀应用分析及结构改进", 《阀门》 * |
| 朱青山等: "ZG20CrMoV阀体水压试验断裂原因分析", 《锅炉制造》 * |
| 焦伦龄等: "水压试验阀的技术开发与应用", 《阀门》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702859A (en) * | 2017-11-25 | 2018-02-16 | 山西江淮重工有限责任公司 | A kind of body strength experiment closure frock |
| CN107702859B (en) * | 2017-11-25 | 2023-12-26 | 山西江淮重工有限责任公司 | Shutoff frock is used in valve body intensity test |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102749173B (en) | 2015-10-07 |
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