CN211344368U - Low pressure valves power oil pipeline - Google Patents
Low pressure valves power oil pipeline Download PDFInfo
- Publication number
- CN211344368U CN211344368U CN201920992651.1U CN201920992651U CN211344368U CN 211344368 U CN211344368 U CN 211344368U CN 201920992651 U CN201920992651 U CN 201920992651U CN 211344368 U CN211344368 U CN 211344368U
- Authority
- CN
- China
- Prior art keywords
- pipe section
- joint
- gasket
- power oil
- low pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Pipe Accessories (AREA)
Abstract
The utility model belongs to the technical field of the pipe connection, concretely relates to low pressure valves power oil pipe line, include: the method comprises the following steps: the pipe section A comprises a gasket A, a tee joint, a plug, a pressure gauge joint, a gasket B, a needle valve, a pipe section B, a movable joint and a pipe section C; three sections of pipe sections of the tee joint are respectively welded with the pipe section A, the pipe section B and one end of the needle valve; a gasket A is arranged at the other end of the pipe section A; the pressure gauge joint is welded with the needle valve; the plug is in threaded connection with the pressure gauge joint through a gasket B; the other end of the pipe section B is in threaded connection with the pipe section C through a locking nut.
Description
Technical Field
The utility model belongs to the technical field of the pipe connection, concretely relates to low pressure valves power oil pipe line.
Background
In the prior art, an oil pipe and a low-pressure valve servomotor are in threaded connection, leakage often occurs at a joint, the leakage cannot be processed during the power operation of a unit, and great hidden danger is brought to safe and stable operation of the unit.
During the unit overhaul, the turbine speed control system needs to demolish oil pipe between carrying out static test, and the interim pressure gauge joint of installation experiment usefulness need resume the pipeline again after experimental completion, and this work is consuming time longer, also has the oil leak risk simultaneously. The pipeline union is dismantled and assembled many times during overhaul, and the joint sealing surface is damaged easily, easily causes the union oil leak during unit operation. Because the original movable joint has design defects, when pressure oil with pressure of about 5MPa is introduced into a pipeline, a fastening nut of the movable joint can be expanded and dead, fastening cannot be carried out, the oil leakage defect cannot be eliminated naturally, the thread is easy to damage, and hidden dangers are brought to safe and stable operation of a unit.
Therefore, it is necessary to design a low-pressure valve group power oil pipeline to improve the problems existing in the prior art and improve the working efficiency, i.e. the safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of above-mentioned prior art provides a low pressure valves power oil pipeline for solve among the prior art technical problem that pipeline and servomotor oil leak, many times dismouting manometer joint during nuclear power station overhaul.
The technical scheme of the utility model is that:
a low pressure valve block power oil line, comprising: a pipe section A1 gasket A2, a tee joint 3, a plug 4, a pressure gauge joint 5, a gasket B6, a needle valve 7, a pipe section B8, a union 9 and a pipe section C10; three pipe sections of the tee joint 3 are respectively connected with the pipe section A1, the pipe section B8 and one end of the needle valve 7 in a welding mode; a gasket A2 is arranged at the other end of the pipe section A1; the pressure gauge joint 5 is welded with the needle valve 7; the plug 4 is in threaded connection with the pressure gauge joint 5 through a gasket B6; the other end of the pipe section B8 is in threaded connection with the pipe section C10 through a lock nut 9.
One end of the pipe section B8 is threadedly connected to the pipe section C10 by the lock nut 9 as described above.
As mentioned above, the pipe section B8 has a taper hole in the end contacting with the pipe section C10, the inner diameter range of the taper hole is as follows: 25.9mm-26.1 mm.
The joint at one side of the pipe segment C10, which is in contact with the pipe segment B8, is of a spherical structure, and the outer diameter size range of the ball joint is as follows: 24.9mm-25.1 mm.
The internal thread pitch of the lock nut 9 is 2mm as described above.
As mentioned above, the pad A2 is a red copper pad, and the pad B6 is a nickel pad.
The utility model discloses following beneficial effect has:
[1] the utility model discloses a low pressure valves power oil pipeline, change the connected mode of pipeline and servomotor from threaded connection to welded connection, eliminated the seepage hidden danger, improved the stability of unit safe operation;
[2] the utility model discloses an oil pipeline has still increased tee bend and needle type valve, can directly install the interim manometer of experimental usefulness on the joint of needle type valve, need not the dismouting pipeline, and the work load that has significantly reduced has optimized the overhaul time limit for a project, has eliminated because of the dismouting causes the screw thread to be stung die repeatedly. Risk of reduced sealing performance;
[3] the utility model discloses a low pressure valves power oil pipeline has carried out redesign transformation to the union, makes its bearing capacity higher, and sealing performance is more outstanding.
Drawings
Fig. 1 is a schematic structural view of a low-pressure valve group power oil pipeline device designed by the present invention;
FIG. 2 is a schematic view of the movable joint structure of the low-pressure valve group power oil pipeline device designed by the utility model
FIG. 3 is a view of the structure of the inlet pipe section B of the union of the low pressure valve group power oil line device designed by the present invention
FIG. 4 is a C structure diagram of the outlet pipe section of the movable joint of the low-pressure valve group power oil line device designed by the utility model
The pressure gauge comprises a pressure gauge connector 1, pipe sections A and 2, gaskets A and 3, a tee joint 4, a plug 5, a pressure gauge connector 6, gaskets B and 7, a needle valve 8, pipe sections B and 9, a locking nut 10 and a pipe section C.
Detailed Description
The technology of the present invention is further described below:
as shown in fig. 1, a low pressure valve group power oil line includes: the pipe section A1 comprises a gasket A2, a tee joint 3, a plug 4, a pressure gauge joint 5, a gasket B6, a needle valve 7, a pipe section B8, a locking nut 9 and a pipe section C10; three pipe sections of the tee joint 3 are respectively connected with the pipe section A1, the pipe section B8 and one end of the needle valve 7 in a welding mode; a gasket A2 is arranged at the other end of the pipe section A1; the pressure gauge joint 5 is welded with the needle valve 7; the plug 4 is in threaded connection with the pressure gauge joint 5 through a gasket B6; the other end of the pipe section B8 is in threaded connection with the pipe section C10 through a lock nut 9.
The integral loose joint is of a ferrule type structure, and the loose joint comprises a pipe section B8, a locking nut 9 and a pipe section C10;
as mentioned above, the pipe section B8 has a taper hole in it, the inner diameter range of the taper hole opening is: 25.9mm-26.1 mm;
the range of outer diameter dimensions of the ball joint at one end of the pipe segment C10 as described above is: 24.9mm-25.1 mm;
the internal thread pitch of the locknut 9 as described above is: 2 mm.
The gasket A2 is a red copper gasket, and the gasket B6 is a nickel gasket;
example (b):
when the device is operated, a tester removes the plug 4 and the gasket B6, replaces the new gasket B6, connects the temporary pressure gauge for test with the pressure gauge joint 5 through threads, opens the stainless steel needle valve 7, opens the pressure gauge oil path, and the pressure gauge is in a usable state; and (5) after the test is finished, removing the pressure gauge and recovering the original state. The temporary pressure gauge is disassembled without disassembling the whole low-pressure valve group power oil pipeline, so that the workload is greatly reduced, the overhaul period is optimized, and the oil leakage risk is eliminated.
The utility model discloses a pipeline section A1 and pipeline section B8 of low pressure valves power oil pipe line pass through three 3 welding with stainless steel needle type valve 7, and manometer joint 5 welds on stainless steel needle type valve 7, helps closing valve oil engine pipeline and low pressure valves power oil pipe line to pass through loose joint threaded connection.
The utility model discloses connected mode between pipeline section A1, pipeline section B8 and the low-pressure valve servomotor among the device is welded connection, has stopped the emergence of seepage phenomenon, and the needle valve 7 and the pressure meter connector 5 that increase simultaneously, the required experimental interim manometer for speed governing system static test can the direct mount on the equipment pipeline, need not to carry out the dismouting to the equipment pipeline again, has improved work efficiency greatly.
In addition, the movable joint is redesigned, the improved movable joint has higher pressure bearing capacity and more excellent sealing performance, and the performance comparison analysis of the improved movable joint and the movable joint before the improvement is as follows:
assuming that the force of the ball joint of the movable joint pressing against the taper hole of the movable joint is 300kg, the cone bearing force F is 300/(2 × tg18.5 °) 448kg
Tensile area S is 2.3 (1.8X 2) x 2 is 16.5mm2
The generated tensile stress sigma is 448kg/0.165cm2 is 2715kg/cm2
The improved movable joint is shown in the attached figures 2, 3 and 4, and compared with the movable joint before the improvement, the differences are as follows:
1. the taper of the taper hole is 37 degrees, the inner diameter phi of the hole opening is 26 +/-0.1 mm, the outer diameter phi of the ball head is 25 +/-0.1 mm, compared with the original movable joint, the contact point moves inwards by one time, and the stress width is doubled;
2. the nominal diameter of the thread of the movable joint is improved from 33mm to 39mm, the thread pitch is improved from 1.5mm to 2mm, and the tensile area of the movable joint is increased by 5 times;
although the tensile strength of the fine thread is not poor, the wear resistance is poor after the fine thread is frequently disassembled and assembled, so that the thread pitch is changed into 2mm3, the contact area between the ball head of the movable joint and the taper hole of the movable joint is increased by 80 percent, the stress is reduced, and the service life is prolonged;
4. improved strength analysis of the union:
tensile area S is 6.4 (3.5X 2) 89.6mm2 is 0.896cm2
The stress sigma generated is 448kg/0.896cm2 is 500kg/cm2
It is apparent that the improved union is less stressed than 1/5 of the improved union, and the strength of the union is improved.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The present invention can adopt the prior art for the content which is not described in detail in the present invention.
Claims (6)
1. A low pressure valve bank power oil line, comprising: the pipe section A (1) comprises a gasket A (2), a tee joint (3), a plug (4), a pressure gauge joint (5), a gasket B (6), a needle valve (7), a pipe section B (8), a locking nut (9) and a pipe section C (10); three pipe sections of the tee joint (3) are respectively welded with the pipe section A (1), the pipe section B (8) and one end of the needle valve (7); a gasket A (2) is arranged at the other end of the pipe section A (1); the pressure gauge joint (5) is welded with the needle valve (7); the plug (4) is in threaded connection with the pressure gauge joint (5) through a gasket B (6); the other end of the pipe section B (8) is in threaded connection with the pipe section C (10) through a locking nut (9).
2. The low-pressure valve group power oil pipeline as claimed in claim 1, wherein one end of the pipe section B (8) is in threaded connection with the pipe section C (10) through a locking nut (9) to form a movable joint structure.
3. The low pressure valve block power oil line of claim 2, wherein: the pipe section B (8) and the pipe section C (10) are contacted, one end of the pipe section B (8) is internally provided with a taper hole, and the inner diameter range of the orifice of the taper hole is as follows: 25.9mm-26.1 mm.
4. A low pressure valve block power oil line as claimed in claim 3, wherein: the joint at one side of the pipe section C (10) contacted with the pipe section B (8) is of a spherical structure, and the outer diameter size range of the spherical joint is as follows: 24.9mm-25.1 mm.
5. The low pressure valve block power oil line of claim 4, wherein: the internal thread pitch of the locking nut (9) is 2 mm.
6. The low pressure valve block power oil line of claim 5, wherein: the gasket A (2) is a red copper gasket, and the gasket B (6) is a nickel gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920992651.1U CN211344368U (en) | 2019-06-28 | 2019-06-28 | Low pressure valves power oil pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920992651.1U CN211344368U (en) | 2019-06-28 | 2019-06-28 | Low pressure valves power oil pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211344368U true CN211344368U (en) | 2020-08-25 |
Family
ID=72128590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920992651.1U Active CN211344368U (en) | 2019-06-28 | 2019-06-28 | Low pressure valves power oil pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211344368U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206956A (en) * | 2019-06-28 | 2019-09-06 | 江苏核电有限公司 | A kind of low pressure valve group power oil pipe line |
-
2019
- 2019-06-28 CN CN201920992651.1U patent/CN211344368U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206956A (en) * | 2019-06-28 | 2019-09-06 | 江苏核电有限公司 | A kind of low pressure valve group power oil pipe line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211344368U (en) | Low pressure valves power oil pipeline | |
| CN102141457A (en) | U-shaped heat exchange tube pressure test positioner | |
| CN113237741A (en) | Hydraulic clamp for electro-hydraulic servo fatigue testing machine | |
| CN204604217U (en) | A kind of stopping transportation pressure changes the device of high compression diameter ball valve | |
| CN210003986U (en) | Movable elbow and movable joint connecting structure | |
| CN109580128B (en) | Device and method for testing tightness of steel pipe coupling thread | |
| CN108644501B (en) | Flange assembly type large-caliber high-pressure pipeline connecting device | |
| CN201788067U (en) | Pressure test head of hydraulic press | |
| CN215334646U (en) | Pipeline valve seat structure of marine high-pressure gas storage device | |
| CN220331203U (en) | Special jacking tool for replacing butt-clamp butterfly valve | |
| CN110206956A (en) | A kind of low pressure valve group power oil pipe line | |
| CN213809474U (en) | Sealing device for main steam safety valve of high-temperature gas cooled reactor | |
| CN100357649C (en) | Rubber compensating device | |
| CN109667933B (en) | Axial sealing device and sealing method for hydraulic mechanical equipment | |
| CN220727208U (en) | Combined check valve for hydrogenation station | |
| CN217153248U (en) | Dismounting device suitable for valve door pole | |
| CN211624580U (en) | Maintenance and emergency rescue device for lining repair pipe | |
| CN217899141U (en) | Hydraulic self-tightening sealing flange connecting system | |
| CN220037733U (en) | Novel high-pressure sealing structure | |
| CN213364549U (en) | Corrosion monitoring probe device | |
| CN215065738U (en) | Hydraulic clamp for electro-hydraulic servo fatigue testing machine | |
| CN220470035U (en) | Sealing structure applied to supercritical carbon dioxide turbine | |
| CN221002679U (en) | Expansion cone with split type structure | |
| CN216952102U (en) | Double-sealing connection structure for lining pipe | |
| CN220366997U (en) | High-pressure valve pressing tool with high sealing performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |