CN104741911A - Integral tensioning control system for manhole cover bolt of vapor generator - Google Patents
Integral tensioning control system for manhole cover bolt of vapor generator Download PDFInfo
- Publication number
- CN104741911A CN104741911A CN201310753889.6A CN201310753889A CN104741911A CN 104741911 A CN104741911 A CN 104741911A CN 201310753889 A CN201310753889 A CN 201310753889A CN 104741911 A CN104741911 A CN 104741911A
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- CN
- China
- Prior art keywords
- valve
- pressure
- manhole cover
- gas
- bolt
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/067—Bolt tensioners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention relates to the technical field of nuclear power overhauling equipment, particularly to an integral tensioning control system for a manhole cover bolt of a vapor generator and aims to solve the problems of the conventional manhole cover bole mounting tool that the damage risk occurs to the bolt, and operation time is long. The integral tensioning control system comprises a bolt tensioning component and a hydraulic control component. According to the arrangement, during detaching or sealing the primary side manhole cover of the vapor generator, thread binding damage never occurs to the manhole cover bolt, at the meanwhile, pressure of the hydraulic control system is strictly controlled, and accordingly safer and quicker operation is achieved.
Description
Technical field
The present invention relates to nuclear power repair apparatus technical field, be specifically related to a kind of steam generator manhole cover monoblock type bolt tension control system.
Background technology
Nuclear power station is carrying out in the process of overhauling, and needs to carry out the operation of primary side of steam generator manhole switch cover.When operating, because evaporimeter primary side need bear the test pressure of about 23MPa, primary side manhole cover bolt needs to provide enough pretightning force to ensure its No leakage under this test pressure to cover plate for manhole.In the past when carrying out nuclear power station maintenance, if need open or compress cover plate for manhole, need to use hydraulic torque spanner to rotate manhole cover bolt, there is the risk of damaged screw, and the operating time is long, operating personnel are easily subject to the radiation of higher dosage.
Summary of the invention
The object of the invention is to solve existing manhole cover bolt erecting tools and there is the risk damaging bolt, and the problem that the operating time is long, provide a kind of bolt that can complete fast and safely to screw the steam generator manhole cover monoblock type bolt tension control system with unscrewing operation.
The present invention is achieved in that
A kind of steam generator manhole cover monoblock type bolt tension control system, comprises bolt tension parts and control block hydraulic unit with; Bolt tension parts are connected by high-pressure oil pipe with control block hydraulic unit with.
Bolt tension parts as above comprise piston, stretching nut, stretching cylinder body, torque spanner, tommy bar and interior six side ring gears; Stretching cylinder body is integral annular part, and it has cylinder holes, each cylinder holes circumference uniform distribution, installs the hollow ring piston with sealing ring, there is oil pocket between the bottom of piston and stretching cylinder body in cylinder holes; Adjacent each cylinder holes is communicated with by cylinder bottom side aperture, and high-pressure pipe connector is connected with the oil pocket between stretching cylinder body and piston; Stretching cylinder body and piston are sleeved on manhole cover tensile bolt successively, and stretching nut rotates the top being placed in piston, is threaded with tensile bolt; Interior six side ring gears are set on six sides of manhole cover nut, and gear tommy bar is meshed with interior six side ring gears.
Control block hydraulic unit with as above comprises source of the gas pneuamtic part and high-pressure hydraulics; Source of the gas pneuamtic part comprises source of the gas, lubricated filter, air-source inflow stop valve, pressure-reducing valve, air gauge, electromagnetic switch valve, flow control valve and one-way throttle valve; Lubricated filter, air-source inflow stop valve, pressure-reducing valve, air gauge, electromagnetic switch valve sequential series connect, and after flow control valve, one-way throttle valve are connected in parallel in electromagnetic switch valve, source of the gas pneuamtic part output is connected with Gas-liquid pump; High-pressure hydraulics comprises Gas-liquid pump, oil suction part and force feed part; Oil suction part comprises fuel tank, stop valve and a check valve, and fuel tank, stop valve are connected with a check valve sequential series and are connected with Gas-liquid pump inlet port; Force feed part comprises a check valve, high-pressure overflow valve, hydraulic oil off-load stop valve, pressure transmitter, oil pressure gauge and fast replace tubes and connects; The force feed mouth of Gas-liquid pump is connect be connected with tensile part by a check valve, fast replace tubes, after high-pressure overflow valve, hydraulic oil off-load stop valve, pressure transmitter, oil pressure gauge are parallel to Gas-liquid pump force feed mouth check valve, wherein, the oil return pipe of high-pressure overflow valve, hydraulic oil off-load stop valve is connected with fuel tank respectively.
Bolt tension parts entirety as above adopts high strength alloy steel to make.
The invention has the beneficial effects as follows:
The present invention includes bolt tension parts and control block hydraulic unit with, manhole cover bolt in primary side of steam generator manhole uncaps dismounting and pass lid seal process can be avoided to produce screw thread bonding damage, the pressure of hydraulic control system is strictly controlled simultaneously, operationally safer and quick compared to existing manhole cover bolt erecting tools.
Accompanying drawing explanation
Fig. 1 is the global sections sectional view of bolt tension parts in a kind of steam generator manhole cover monoblock type bolt tension control system of the present invention;
Fig. 2 is the partial cross-sectional cut-away view of bolt tension parts in a kind of steam generator manhole cover monoblock type bolt tension control system of the present invention;
Fig. 3 is the top view of cylinder body of stretching in a kind of steam generator manhole cover monoblock type bolt tension control system of the present invention;
Fig. 4 is the circuit connection diagram of control block hydraulic unit with in a kind of steam generator manhole cover monoblock type bolt tension control system of the present invention.
In figure: 1. primary side of steam generator manhole, 2. manhole cover, 3. manhole cover nut, 4. high-pressure pipe connector, 5. piston, 6. manhole cover tensile bolt, 7. stretching nut, 8. stretching cylinder body, 9. bolt stretching machine, 10. digital display centimeter, 11. torque spanners, 12. gear tommy bars, six side ring gears in 13., 14. sealing gasket pressing plates, 15. Manhole Sealing Joints assemblies, 16. sources of the gas, 17. lubricated filters, 18. air-source inflow stop valves, 19. pressure-reducing valves, 20. air gauges, 21. electromagnetic switch valves, 22. flow control valves, 23. one-way throttle valves, 24. Gas-liquid pumps, 25. fuel tanks, 26. stop valves, 27. check valves, 28. high-pressure overflow valves, 29. hydraulic oil off-load stop valves, 30. pressure transmitters, 31. oil pressure gauges, 32. fast replace tubes connect.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, a kind of steam generator manhole cover monoblock type bolt tension control system of the present invention is described in detail:
A kind of steam generator manhole cover monoblock type bolt tension control system, comprise bolt tension parts and control block hydraulic unit with, bolt tension parts are connected by high-pressure oil pipe with control block hydraulic unit with.Control block hydraulic unit with is used for providing high pressure liquid force feed to bolt tension parts, can make the stretching of bolt tension parts realization to manhole cover tensile bolt 6.
As shown in Figure 1, 2, bolt tension parts comprise piston 5, stretching nut 7, stretching cylinder body 8, torque spanner 11, tommy bar 12 and interior six side ring gears 13.Stretching cylinder body 8 is integral annular part, and it has cylinder holes, each cylinder holes circumference uniform distribution, installs the hollow ring piston 5 with sealing ring, there is oil pocket between the bottom of piston 5 and stretching cylinder body 8 in cylinder holes.Adjacent each cylinder holes is communicated with by cylinder bottom side aperture.High-pressure pipe connector 4 is connected with the oil pocket between stretching cylinder body 8 and piston 5; Stretching cylinder body 8 and piston 5 are sleeved on manhole cover tensile bolt 6 successively, and stretching nut 7 rotates the top being placed in piston 5, is threaded with tensile bolt 6.Interior six side ring gears 13 are set on six sides of manhole cover nut 3, and gear tommy bar 12 is meshed with interior six side ring gears 13.When torque spanner 11 transmitting gear tommy bar 12, rotate manhole cover nut 3 through interior six side ring gears 13, screwing and unscrewing of manhole cover nut 3 can be realized.
As shown in Figure 4, control block hydraulic unit with comprises source of the gas pneuamtic part and high-pressure hydraulics.Source of the gas pneuamtic part comprises source of the gas 16, lubricated filter 17, air-source inflow stop valve 18, pressure-reducing valve 19, air gauge 20, electromagnetic switch valve 21, flow control valve 22 and one-way throttle valve 23; Lubricated filter 17, air-source inflow stop valve 18, pressure-reducing valve 19, air gauge 20, electromagnetic switch valve 21 sequential series connect, after flow control valve 22, one-way throttle valve 23 are connected in parallel in electromagnetic switch valve, source of the gas pneuamtic part output is connected with Gas-liquid pump 24.High-pressure hydraulics comprises Gas-liquid pump 24, oil suction part and force feed part; Oil suction part comprises fuel tank 25, stop valve 26 and a check valve 27, and fuel tank 25, stop valve 26 are connected with check valve 27 sequential series and are connected with Gas-liquid pump 24 inlet port.Force feed part comprises a check valve 27, high-pressure overflow valve 28, hydraulic oil off-load stop valve 29, pressure transmitter 30, oil pressure gauge 31 and fast replace tubes and connects 32; The force feed mouth of Gas-liquid pump 24 is connect 32 be connected with tensile part by a check valve 27, fast replace tubes, after high-pressure overflow valve 28, hydraulic oil off-load stop valve 29, pressure transmitter 30, oil pressure gauge 31 are parallel to Gas-liquid pump 24 force feed mouth check valve 27, wherein the oil return pipe of high-pressure overflow valve 28, hydraulic oil off-load stop valve 29 is connected with fuel tank 25 respectively.
During work, first tensile part cover is installed on manhole cover tensile bolt 6, then stretching nut 7 is rotated and be placed on the tensile bolt 6 of the top of piston 5, the output of control block hydraulic unit with is connected to the high-pressure pipe connector 4 of tensile part through high-pressure hose; Open air-source inflow stop valve 18, start source of the gas pneuamtic part, make air pressure reach required value, open electromagnetic switch valve 21 through adjustment pressure-reducing valve 19, adjustment one-way throttle valve 23, makes Gas-liquid pump 24 start under the condition that pressure versus flow is controlled; Change through Gas-liquid pump 24 and large discharge low-pressure gas is converted to super high pressure microstream amount hydraulic pressure exports bolt stretching machine 9 to, the inlet port of Gas-liquid pump by the hydraulic oil in fuel tank through stop valve 26, check valve 27 inhaling air liquid pump 24; Hydraulic oil, by after Gas-liquid pump 24 supercharging, connects 32 through check valve 27, fast replace tubes, high-pressure hose is delivered in the space between tensile part stretching cylinder body 8 and piston 5; This design of pressure is the highest safe pressure of system by the force value of adjustment high-pressure overflow valve 28, and when the force value of high-pressure hydraulics reaches the highest safe pressure of setting, high-pressure overflow valve 28 automatic deloading, guarantees high-pressure hydraulic safety; When control block hydraulic unit with lost efficacy, opened hydraulic oil off-load stop valve 14, and made high-pressure hydraulics off-load, guarantee the safety of whole control block hydraulic unit with; The force value of high-pressure hydraulics converts the corresponding signal of telecommunication to through pressure transmitter 30 and is sent to computer, for the automatic control of tensile part provides foundation; Oil pressure gauge 31 is used to indicate the pressure of extra high voltage system.
To uncap operation sequence: first tensile part cover is installed on manhole cover tensile bolt 6, then stretching nut 7 is rotated on the tensile bolt 6 be placed in above piston 5, the output of control block hydraulic unit with is connected to the high-pressure pipe connector 4 of tensile part through high-pressure hose; Open air-source inflow stop valve 18, start source of the gas pneuamtic part, the high pressure liquid force feed exported after Gas-liquid pump 24 is changed promotes piston 5 and moves to the direction away from manhole cover 2, drawn nut 7 pairs of manhole cover tensile bolts 6 stretch, manhole cover tensile bolt 6 is extended, drives manhole cover nut 3 to move to the direction away from manhole cover 2; Rotating torque spanner 11, manhole cover nut 3 is unscrewed through gear tommy bar 12, interior six side ring gears 13, make manhole cover nut 3 and manhole cover 2 between the two apart from the displacement being greater than tensile bolt 6 resilience, close source of the gas 16, open hydraulic oil off-load stop valve 29, high pressure liquid force feed returns fuel tank 25, makes high-pressure hydraulics off-load, manhole cover tensile bolt 6 resilience; Dismantle tensile part again after removing all stretching nuts 7, after removing everyone port lid nut 3, pull down manhole cover.
Close lid operation sequence: to be first set in by manhole cover 2 on tensile bolt and to screw on manhole cover nut 3; Tensile part cover is installed on manhole cover tensile bolt 6, then stretching nut 7 is rotated and be placed on the manhole cover tensile bolt 6 of the top of piston 5, the output of control block hydraulic unit with is connected to the high-pressure pipe connector 4 of tensile part through high-pressure hose; Open air-source inflow stop valve 18, start source of the gas pneuamtic part, the high pressure liquid force feed exported after Gas-liquid pump 24 is changed promotes piston 5 and moves to the direction away from manhole cover 2, drawn nut 7 pairs of manhole cover tensile bolts 6 stretch, manhole cover tensile bolt 6 is extended, drives manhole cover nut 3 to move to the direction away from manhole cover 2; Rotating torque spanner 11, screws manhole cover nut 3 through gear tommy bar 12, interior six side ring gears 13, closes source of the gas 16, open hydraulic oil off-load stop valve 29, high pressure liquid force feed returns fuel tank 25, makes high-pressure hydraulics off-load, manhole cover tensile bolt 6 resilience, manhole cover 2 compresses by manhole cover nut 3; Tensile part is dismantled again after removing all stretching nuts 7.
The present invention includes bolt tension parts and control block hydraulic unit with, manhole cover bolt in primary side of steam generator manhole uncaps dismounting and pass lid seal process can be avoided to produce screw thread bonding damage, the pressure of hydraulic control system is strictly controlled simultaneously, operationally safer and quick compared to existing manhole cover bolt erecting tools.
Claims (4)
1. a steam generator manhole cover monoblock type bolt tension control system, it is characterized in that: it comprises bolt tension parts and control block hydraulic unit with, bolt tension parts are connected by high-pressure oil pipe with control block hydraulic unit with.
2. steam generator manhole cover monoblock type bolt tension control system according to claim 1, is characterized in that: described bolt tension parts comprise piston (5), stretching nut (7), stretching cylinder body (8), torque spanner (11), tommy bar (12) and interior six side ring gears (13); Stretching cylinder body (8) is integral annular part, and it has cylinder holes, each cylinder holes circumference uniform distribution, installs the hollow ring piston (5) with sealing ring, there is oil pocket between the bottom of piston (5) and stretching cylinder body (8) in cylinder holes; Adjacent each cylinder holes is communicated with by cylinder bottom side aperture, and high-pressure pipe connector (4) is connected with the oil pocket between stretching cylinder body (8) and piston (5); Stretching cylinder body (8) and piston (5) are sleeved on manhole cover tensile bolt (6) successively, and stretching nut (7) rotates the top being placed in piston (5), is threaded with tensile bolt (6); Interior six side ring gears (13) are set on six sides of manhole cover nut (3), and gear tommy bar (12) is meshed with interior six side ring gears (13).
3. steam generator manhole cover monoblock type bolt tension control system according to claim 1, is characterized in that: described control block hydraulic unit with comprises source of the gas pneuamtic part and high-pressure hydraulics; Source of the gas pneuamtic part comprises source of the gas (16), lubricated filter (17), air-source inflow stop valve (18), pressure-reducing valve (19), air gauge (20), electromagnetic switch valve (21), flow control valve (22) and one-way throttle valve (23); Lubricated filter (17), air-source inflow stop valve (18), pressure-reducing valve (19), air gauge (20), electromagnetic switch valve (21) sequential series connect, after flow control valve (22), one-way throttle valve (23) are connected in parallel in electromagnetic switch valve, source of the gas pneuamtic part output is connected with Gas-liquid pump (24); High-pressure hydraulics comprises Gas-liquid pump (24), oil suction part and force feed part; Oil suction part comprises fuel tank (25), stop valve (26) and a check valve (27), and fuel tank (25), stop valve (26) are connected with check valve (27) sequential series and are connected with Gas-liquid pump (24) inlet port; Force feed part comprises a check valve (27), high-pressure overflow valve (28), hydraulic oil off-load stop valve (29), pressure transmitter (30), oil pressure gauge (31), fast replace tubes connect (32); The force feed mouth of Gas-liquid pump (24) is connect (32) be connected with bolt tension parts by a check valve (27), fast replace tubes, after high-pressure overflow valve (28), hydraulic oil off-load stop valve (29), pressure transmitter (30), oil pressure gauge (31) are parallel to Gas-liquid pump (24) force feed mouth check valve (27), wherein, the oil return pipe of high-pressure overflow valve (28), hydraulic oil off-load stop valve (29) is connected with fuel tank (25) respectively.
4. steam generator manhole cover monoblock type bolt tension control system according to claim 1, is characterized in that: described bolt tension parts entirety adopts high strength alloy steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753889.6A CN104741911B (en) | 2013-12-31 | 2013-12-31 | A kind of steam generator manhole cover monoblock type bolt tension control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753889.6A CN104741911B (en) | 2013-12-31 | 2013-12-31 | A kind of steam generator manhole cover monoblock type bolt tension control system |
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| CN104741911A true CN104741911A (en) | 2015-07-01 |
| CN104741911B CN104741911B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310753889.6A Active CN104741911B (en) | 2013-12-31 | 2013-12-31 | A kind of steam generator manhole cover monoblock type bolt tension control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106736480A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of hydraulic elongator and its drawing process |
| CN108747962A (en) * | 2018-07-25 | 2018-11-06 | 三门核电有限公司 | A kind of steam generator closure plate removal tool and method |
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| CN203649889U (en) * | 2013-12-31 | 2014-06-18 | 中核武汉核电运行技术股份有限公司 | Vapor generator manhole cover integral type bolt stretching control system |
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2013
- 2013-12-31 CN CN201310753889.6A patent/CN104741911B/en active Active
Patent Citations (6)
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| CN101649929A (en) * | 2009-07-07 | 2010-02-17 | 哈尔滨工程大学 | Deep sea flange connecting bolt library screwing device |
| CN201677169U (en) * | 2010-05-20 | 2010-12-22 | 海泰斯（北京）工程设备有限公司 | Novel undersea hydraulic bolt stretcher |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106736480A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of hydraulic elongator and its drawing process |
| CN108747962A (en) * | 2018-07-25 | 2018-11-06 | 三门核电有限公司 | A kind of steam generator closure plate removal tool and method |
| CN108747962B (en) * | 2018-07-25 | 2023-09-08 | 三门核电有限公司 | Tool and method for removing blocking plate of steam generator |
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| Publication number | Publication date |
|---|---|
| CN104741911B (en) | 2017-01-04 |
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