CN2737507Y - Hydraulic bolt stretcher - Google Patents
Hydraulic bolt stretcher Download PDFInfo
- Publication number
- CN2737507Y CN2737507Y CN 200420062200 CN200420062200U CN2737507Y CN 2737507 Y CN2737507 Y CN 2737507Y CN 200420062200 CN200420062200 CN 200420062200 CN 200420062200 U CN200420062200 U CN 200420062200U CN 2737507 Y CN2737507 Y CN 2737507Y
- Authority
- CN
- China
- Prior art keywords
- oil
- oil cylinder
- bolt
- piston
- moving spring
- 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.)
- Expired - Fee Related
Links
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 39
- 239000002828 fuel tank Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model relates to a bolt hydraulic stretcher, which can conveniently fasten and disassemble a high-strength bolt, and solves the problem that pressure oil between a piston and an oil cylinder is wasted and time is wasted due to manual drainage; the pressure oil is not recycled, which causes oil waste and environmental pollution. The oil cylinder is provided with a reset spring fixing bolt, a through hole is formed in the position, corresponding to the screw hole of the oil cylinder, of the piston, the reset spring is installed on the fixing bolt, the reset of the oil cylinder is completed by the spring force of the reset spring, labor and time are saved, pressure oil in the oil cylinder flows back to the oil tank, oil is saved, and environmental pollution is eliminated.
Description
(1) technical field
The utility model relates to the bolt hydraulic elongator that a kind of high-strength bolt is fastening and dismantle.
(2) background technology
At present, the bolt hydraulic elongator that carries out bolted and dismounting is by oil cylinder, piston, high-pressure oil pipe, bleeder plug, support ring, tightening and loosening rod and hydraulic pump are formed, bolt one end is fixed on the body, the other end links to each other with piston, oil cylinder by support ring be bearing in another body on, when the pressure oil of hydraulic pump injects in the oil cylinder by high-pressure oil pipe, oil cylinder is motionless, and oil pressure promotes piston and passes to body by bolt, realizes compressing of body and another body, compressing the back can be fastening by the tightening and loosening rod or dismantle hold-down nut, after fastening or dismounting hold-down nut is finished, the hydraulic pump fuel cut-off, the pressure oil between piston and the oil cylinder is drained by drain oil, use the dedicated handle rotary oil cylinder, thereby reach the purpose of extruding emptying, oil cylinder is resetted, lay down stretcher.Because the pressure oil between piston and the oil cylinder is by artificial discharge, its effort, time-consuming; Pressure oil is drained by drain oil owing to do not reclaim, and causes oil plant waste and environmental pollution.
(3) summary of the invention
In order to overcome above-mentioned defective, the utility model provides a kind of bolt hydraulic elongator, can realize that oil cylinder automatically resets, and hydraulic oil is back in the fuel tank of hydraulic pump.
The technical scheme in the invention for solving the technical problem is: screw hole is arranged on oil cylinder, the back-moving spring set bolt is installed, the back-moving spring set bolt passes the through hole on the piston, piston hole and back-moving spring set bolt fit clearance are at 0.1-1.0mm, on the back-moving spring set bolt back-moving spring is installed, back-moving spring has the 6-12 root.The back-moving spring pressurized is compressive state when stretcher stretches, end-of-job, and hydraulic pump fuel cut-off and unloading, the spring force of back-moving spring is extruded the pressure oil in the oil cylinder, and is back in the fuel tank by oil cylinder.
The beneficial effects of the utility model are that resetting of oil cylinder finished automatically by the spring force of back-moving spring, save manpower and time; Pressure oil in the oil cylinder is back to fuel tank, has saved oil plant, has eliminated environmental pollution.
(4) description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Figure is a kind of bolt hydraulic elongator schematic diagram
Among the figure: 1. body 1 2. nuts 3. tightening and loosenings rods 4. support rings 5. oil cylinders
6. piston 7. snap joints 8. petroleum pipelines 9. bolts 10. oil-draining locknuts
11. back-moving spring set bolt 12. back-moving springs 13. sealing rings 14. hydraulic pumps 15. bodies 2
(5) specific embodiment
The specific embodiment:
In the drawings, bolt (9) one ends are fixed on the body 1 (1), the other end links to each other with piston (6), oil cylinder (5) by support ring (4) be bearing in another body 2 (15) on, back-moving spring set bolt (11) is installed on oil cylinder (5), back-moving spring set bolt (11) passes the through hole on the piston (6), back-moving spring (12) is installed on the back-moving spring set bolt (11), the pressure oil of hydraulic pump when stretcher stretches (14) injects in the oil cylinder (5) by high-pressure oil pipe (8), oil cylinder (5) is passed to body 1 (1) and body 2 (15) by the oil pressure active force by bolt (9) and support ring (4) with piston (6), realize compressing of body 1 (1) and another body 2 (15), seal by sealing ring (13) between piston (5) and the oil cylinder (6), back-moving spring (12) pressurized is compressive state, two bodies compress the back can be fastening by tightening and loosening rod (3) or dismantle hold-down nut (4), after fastening or dismounting hold-down nut (4) is finished, hydraulic pump (14) fuel cut-off and unloading, the spring force of back-moving spring (12) is by oil cylinder (5), pressure oil in the oil cylinder (5) is extruded, and be back in the fuel tank.
Claims (1)
- A kind of bolt hydraulic elongator comprises oil cylinder, piston, it is characterized in that on the described oil cylinder screw hole being arranged, the back-moving spring set bolt is installed, and there is through hole the corresponding position of described piston and described oil cylinder screw hole, on the back-moving spring set bolt back-moving spring is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420062200 CN2737507Y (en) | 2004-06-22 | 2004-06-22 | Hydraulic bolt stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420062200 CN2737507Y (en) | 2004-06-22 | 2004-06-22 | Hydraulic bolt stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2737507Y true CN2737507Y (en) | 2005-11-02 |
Family
ID=35347421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420062200 Expired - Fee Related CN2737507Y (en) | 2004-06-22 | 2004-06-22 | Hydraulic bolt stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2737507Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120296A (en) * | 2011-01-25 | 2011-07-13 | 江苏拓盛重工机械有限公司 | Hydraulic preloading device of fixed bolt |
| CN103659251A (en) * | 2013-11-21 | 2014-03-26 | 南通高盛机械制造有限公司 | Automatic resetting stretcher |
| CN107511788A (en) * | 2017-08-24 | 2017-12-26 | 北京动力机械研究所 | Threaded pre-tightening assembling structure |
| CN113733017A (en) * | 2021-09-16 | 2021-12-03 | 中船动力研究院有限公司 | Hydraulic bolt stretcher |
-
2004
- 2004-06-22 CN CN 200420062200 patent/CN2737507Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120296A (en) * | 2011-01-25 | 2011-07-13 | 江苏拓盛重工机械有限公司 | Hydraulic preloading device of fixed bolt |
| CN103659251A (en) * | 2013-11-21 | 2014-03-26 | 南通高盛机械制造有限公司 | Automatic resetting stretcher |
| CN107511788A (en) * | 2017-08-24 | 2017-12-26 | 北京动力机械研究所 | Threaded pre-tightening assembling structure |
| CN113733017A (en) * | 2021-09-16 | 2021-12-03 | 中船动力研究院有限公司 | Hydraulic bolt stretcher |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051102 Termination date: 20100622 |