CN209394608U - A kind of generator foundation bolt stretcher - Google Patents
A kind of generator foundation bolt stretcher Download PDFInfo
- Publication number
- CN209394608U CN209394608U CN201822248967.8U CN201822248967U CN209394608U CN 209394608 U CN209394608 U CN 209394608U CN 201822248967 U CN201822248967 U CN 201822248967U CN 209394608 U CN209394608 U CN 209394608U
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- piston
- foundation bolt
- sealing
- generator foundation
- 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
Abstract
A kind of generator foundation bolt stretcher, including pedestal, pulling sleeve outer diameter is consistent with base inner diameter, places in the base, directly cooperates with generator foundation bolt, pulling sleeve is provided with hole at every side center, for plugging driving lever；It further include oil cylinder, oil cylinder is placed in pedestal top；Base top design has a circle groove, encloses groove with oil cylinder bottom one and works in coordination；There is piston inside oil cylinder, piston jacks under the active force of hydraulic oil stretches nut, and there are axis sealing and hole sealing mounting groove, axis sealing sealing piston and hydraulic cylinder integral channels for piston；And hole sealing sealing piston and hydraulic cylinder outer channels；Spring, latch bracket are also equipped with inside oil cylinder；And the space between oil cylinder and piston is hydraulic oil chamber；Connection, which is placed on, to be stretched between nut and oil cylinder；The application can more simply and rapidly dismount generator foundation bolt.
Description
Technical field
The invention belongs to bolt tensioning jack fields, and in particular to a kind of generator foundation bolt stretcher.
Background technique
Important equipment of the generator as nuclear power plant, for converting electric energy for the kinetic energy of steam turbine and exporting to user.
During in steam-electric generating set shafting is looked for, it usually needs complied with standard by adjusting generator unit stator to reach centre data
Purpose, need to dismount generator foundation bolt during this.Due to larger (the torque standard of generator fastening foundation bolt power
For 720KN), Normal hydraulic torque spanner is difficult to control accurately Tightening moment, and dismounting is improper easily to cause foundation bolt to damage.With
This simultaneously, narrow space at generator foundation bolt, disassembly is difficult.Therefore it needs to design a kind of generator foundation bolt stretching
Device, to solve the above problems.
Summary of the invention
It is an object of the invention to: a kind of generator foundation bolt stretcher is devised, is designed using monoblock type oil cylinder, it is living
Plug is designed to built-in, can more simply and rapidly dismount generator foundation bolt (bolt specification M68 × 4, quantity total 60
), to guarantee not to be damaged to foundation bolt, while other adverse effects will not be generated to equipment.Stretcher maximum pressure can
Up to 1500Bar, maximum load 1500KN, range 10mm.
Technical scheme is as follows: a kind of generator foundation bolt stretcher, including pedestal, pulling sleeve outer diameter and pedestal
Internal diameter is consistent, places in the base, directly cooperates with generator foundation bolt, pulling sleeve is provided with hole at every side center, for plugging
Driving lever；
It further include oil cylinder, oil cylinder is placed in pedestal top；Base top design has a circle groove, encloses with oil cylinder bottom one recessed
Slot is worked in coordination；There is piston inside oil cylinder, piston jacks under the active force of hydraulic oil stretches nut, and there are axis with close for piston
Envelope and hole sealing mounting groove, axis sealing sealing piston and hydraulic cylinder integral channel；And hole with sealing sealing piston with it is hydraulic
Cylinder outer channels；Spring, latch bracket are also equipped with inside oil cylinder；And the space between oil cylinder and piston is hydraulic oil chamber；
Connection, which is placed on, to be stretched between nut and oil cylinder；
It further include transit joint, quick coupling, quick coupling downstream is connect with transit joint；Transit joint downstream screw thread is straight
It connects and screws in the reserved internal thread hole of oil cylinder.
The pulling sleeve interior design has interior hexagonal structure.
The hole diameter 14mm is provided at the every side center of pulling sleeve.
The axis sealing, hole sealing are O-ring standard component.
The stretching nut is designed as two sections, and internal screw thread is designed in bottom, consistent with generator foundation bolt thread size, directly
It is matched to connect screw-in generator foundation bolt.
The pedestal is circular configuration.
The reserved internal thread hole of oil cylinder that screws in is connected to the hydraulic oil chamber between piston and oil cylinder.
Remarkable result of the invention is:
1, bolt tensioning jack stretching mode is not influenced by bolt lubricant effect and thread friction size, it is available more
Accurate bolt load.Pretightning force can be accurately controlled when work, do not damage screw thread, is easy to operate, reducing labor intensity, shortening life
It produces maintenance cycle, effectively increase the reliability of link and the fatigue resistance of bolt, raising assembly precision and safety coefficient；
2, bolt tensioning jack fully considers in design calculates site dimension requirement, meets maximum load with minimum volume
It is required that；
3, consider there is baffle around foundation bolt, bolt tensioning jack devises six pulling holes, and work angle is by standard money 120
Degree is changed to 60 degree of operations, solves space minor issue；
4, bolt tensioning jack has installed built-in spring additional, it can be achieved that the automatic kichback return mechanism that automatically resets, completes to let out stretching
It is automatically replied after pressure in place, does not need to be manually operated；
5, bolt tensioning jack pedestal is customized, has done full graduation processing, has met site requirement；
6, bolt tensioning jack devises the safety valve for preventing overtravel in oil cylinder, and overtravel protective device is reduced because of behaviour
It makes mistakes caused bad seals；
7, it is used to meet stretcher upside-down mounting, pulling sleeve is built in and is stretched in gantry, prevents from falling off.
Detailed description of the invention
Fig. 1 is generator foundation bolt stretcher schematic diagram of the present invention；
In figure: 1- stretches nut；2- piston；The sealing of 3- axis；The sealing of the hole 4-；5- oil cylinder；6- spring；7- latch bracket；
8- connector sleeve；9- pedestal；10- pulling sleeve；11- transit joint；12- quick coupling；13- driving lever
Specific embodiment
A kind of generator foundation bolt stretcher, including pedestal 9, pedestal 9 are circular configuration, 10 outer diameter of pulling sleeve and pedestal 9
Internal diameter is consistent, is placed in pedestal 9, and 10 interior design of pulling sleeve has interior hexagonal structure, directly cooperates with generator foundation bolt, dials
It covers and is provided with the hole diameter 14mm at 10 every side centers, for plugging driving lever 13, reach the mesh of turn nut by stirring pulling sleeve 10
's；
It further include oil cylinder 5, oil cylinder 5 is placed in 9 top of pedestal；9 top design of pedestal has a circle groove, with 5 bottom of oil cylinder
One circle groove is worked in coordination；There is piston 2 inside oil cylinder 5, piston 2 jacks under the active force of hydraulic oil stretches nut 1, and piston
2 there are axis sealing 3 and hole 4 mounting grooves of sealing, axis 3 sealing piston 2 of sealing and hydraulic cylinder integral channel；And hole seals
4 sealing pistons 2 and hydraulic cylinder outer channels；Axis sealing 3, hole sealing 4 are O-ring standard component；It is also installed inside oil cylinder 5
There are spring 6, latch bracket 7, spring 6, latch bracket 7 are resetting apparatus, and the space between oil cylinder 5 and piston 2 is hydraulic fluid chamber
Room.
Connector sleeve 8, which is placed in, to be stretched between nut 1 and oil cylinder 5；Stretch nut 1 and be designed as two sections, bottom design internal screw thread (with
Generator foundation bolt thread size is consistent), it is matched to thread directly into generator foundation bolt；
It further include transit joint 11, quick coupling 12,12 downstream of quick coupling is connect with transit joint 11；Transit joint 11
Downstream screw thread threads directly into the reserved internal thread hole of oil cylinder 5, which is connected to the hydraulic oil chamber between piston 2 and oil cylinder 5.
When work, pulling sleeve 10 is screwed on the nut that need to stretch, then successively mounting seat 9, oil cylinder 5 and stretches nut 1
It is screwed on the bolt that need to be stretched.When work, the hydraulic oil of oil pump output, by high-pressure hose, from quick on stretcher oil cylinder 5
Connector 12 and transit joint 11 inject oil pocket, piston 2 and oil cylinder 5 and generate relative motion, the internal screw thread of oil cylinder 5 under oil pressure effect
It drives bolt to generate drawing force, makes bolt elongate；Then by 10 rotating nuts of driving lever 13 and pulling sleeve, to realize to lower margin spiral shell
The fastening and disassembly of bolt.After the completion of work, shed oil pump oil pressure, each component self-return, under the action of spring 6, nut and
Contact surface is close to, so that the axial deformation of bolt be lockked.
Claims (7)
1. a kind of generator foundation bolt stretcher, it is characterised in that: including pedestal (9), in pulling sleeve (10) outer diameter and pedestal (9)
Diameter is consistent, is placed in pedestal (9), directly cooperates with generator foundation bolt, and pulling sleeve (10) is provided with hole at every side center, is used for
It plugs driving lever (13)；
It further include oil cylinder (5), oil cylinder (5) is placed in pedestal (9) top；Pedestal (9) top design has a circle groove, with oil cylinder
(5) bottom one encloses groove and works in coordination；Have piston (2) inside oil cylinder (5), piston (2) jacks drawing under the active force of hydraulic oil
It stretches nut (1), and there are axis sealing (3) and hole sealing (4) mounting groove, axis sealings (3) sealing piston (2) for piston (2)
With hydraulic cylinder integral channel；And hole sealing (4) sealing piston (2) and hydraulic cylinder outer channels；It is also equipped with inside oil cylinder (5)
Spring (6), latch bracket (7)；And the space between oil cylinder (5) and piston (2) is hydraulic oil chamber；
Connector sleeve (8), which is placed in, to be stretched between nut (1) and oil cylinder (5)；
It further include transit joint (11), quick coupling (12), quick coupling (12) downstream is connect with transit joint (11)；Transition connects
Head (11) downstream screw thread threads directly into oil cylinder (5) reserved internal thread hole.
2. a kind of generator foundation bolt stretcher according to claim 1, it is characterised in that: the pulling sleeve (10) is internal
Design has interior hexagonal structure.
3. a kind of generator foundation bolt stretcher according to claim 1, it is characterised in that: the every side of the pulling sleeve (10)
The hole diameter 14mm is provided at center.
4. a kind of generator foundation bolt stretcher according to claim 1, it is characterised in that: axis sealing (3),
Hole is O-ring standard component with sealing (4).
5. a kind of generator foundation bolt stretcher according to claim 1, it is characterised in that: the stretching nut (1)
Two sections are designed as, internal screw thread is designed in bottom, and it is consistent with generator foundation bolt thread size, thread directly into generator foundation bolt
It is matched.
6. a kind of generator foundation bolt stretcher according to claim 1, it is characterised in that: the pedestal (9) is circle
Shape structure.
7. a kind of generator foundation bolt stretcher according to claim 1, it is characterised in that: the screw-in oil cylinder (5)
Reserved internal thread hole is connected to the hydraulic oil chamber between piston (2) and oil cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822248967.8U CN209394608U (en) | 2018-12-29 | 2018-12-29 | A kind of generator foundation bolt stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822248967.8U CN209394608U (en) | 2018-12-29 | 2018-12-29 | A kind of generator foundation bolt stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209394608U true CN209394608U (en) | 2019-09-17 |
Family
ID=67897077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822248967.8U Active CN209394608U (en) | 2018-12-29 | 2018-12-29 | A kind of generator foundation bolt stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209394608U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744486A (en) * | 2019-09-26 | 2020-02-04 | 沪东重机有限公司 | Disassembling tool and disassembling method for crankshaft damper of diesel engine |
-
2018
- 2018-12-29 CN CN201822248967.8U patent/CN209394608U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744486A (en) * | 2019-09-26 | 2020-02-04 | 沪东重机有限公司 | Disassembling tool and disassembling method for crankshaft damper of diesel engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209394608U (en) | A kind of generator foundation bolt stretcher | |
| CN111764853B (en) | Electro-hydraulic setting device | |
| CN102937013B (en) | Headframe type long stroke hydraulic pumping unit | |
| CN206647359U (en) | A kind of hydraulic pump station | |
| CN204300011U (en) | A kind of split type pneumohydraulic pressure-cylinder | |
| CN105245053A (en) | Self-limiting electric push rod | |
| CN102777392B (en) | Testing device for oil impeller for supplying oil to two-way thrust bearing of reactor coolant pump | |
| CN206036621U (en) | Annotate fat pump | |
| CN204082559U (en) | Low voltage heavy current porting displaceable electric scroll compressor | |
| CN205254909U (en) | Locking dish assembles positioner in advance | |
| CN207485772U (en) | A kind of hydraulic power station intelligent checking system | |
| CN209230942U (en) | A kind of interior jet-preventing tool pressure testing table | |
| CN206310214U (en) | Apneumatic pattern lubricant sprays lubricating arrangement | |
| CN112065814A (en) | Oil cylinder structure of furnace pounding vehicle | |
| CN205630460U (en) | Tool for pulling out locating pin | |
| CN213419484U (en) | Energy-saving emission-reducing spiral fluid turbine pump | |
| CN203272163U (en) | Forced circulation pump hydraulic model test device for 600MW thermal power station supercritical boiler | |
| CN207906825U (en) | A kind of air-pump rapid installation device of Pneumatic high pressure greasing pump | |
| CN205105035U (en) | From spacing electric putter | |
| CN109459228A (en) | A kind of interior jet-preventing tool pressure testing table | |
| CN204647841U (en) | Indoor pressurized gas preparing apparatus | |
| CN205745979U (en) | Oil pumper screw butter injection device | |
| CN203185281U (en) | Tightening device for flange bolt of high-pressure heater of thermal power plant | |
| CN105422935B (en) | A kind of low oil pressure safety valve and its pressure releasing method | |
| CN217502111U (en) | Improved pressure accumulator of gearbox |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |