CN201684849U - Short-stroke reciprocating steel pipe expanding machine - Google Patents
Short-stroke reciprocating steel pipe expanding machine Download PDFInfo
- Publication number
- CN201684849U CN201684849U CN2010201417226U CN201020141722U CN201684849U CN 201684849 U CN201684849 U CN 201684849U CN 2010201417226 U CN2010201417226 U CN 2010201417226U CN 201020141722 U CN201020141722 U CN 201020141722U CN 201684849 U CN201684849 U CN 201684849U
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- piston rod
- expanding machine
- steel pipe
- pull rod
- short
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Abstract
The utility model discloses a short-stroke reciprocating steel pipe expanding machine, which comprises a frame, a hydraulic cylinder, a clamping structure, a pull rod and an expanding die. The hydraulic cylinder is disposed on the frame and in transmission connection with the clamping structure, and one end of the pull rod is connected with the expanding die. The short-stroke reciprocating steel pipe expanding machine is characterized in that a piston rod of the hydraulic cylinder is of a hollow structure, two ends of the piston rod extend out of a cylinder body, and the pull rod penetrates through the hollow portion of the piston rod. The short-stroke reciprocating steel pipe expanding machine is simple in structure, the hollow structure of the piston rod allows the pull rod of the expanding machine to be capable of being disposed into the piston rod, while the pull rod penetrates through the whole cylinder, a piston and the piston rod can easily realize reciprocation, theoretically, the pull rod in any length can be used on the expanding machine, thereby total stoke of the pull rod is greatly increased, and length of a finished steel pipe cannot be limited by the cylinder stroke. The expanding machine adopting the technique can increase working efficiency and effectively save production cost.
Description
Technical field
The utility model relates to a kind of steel tube expansion, the reciprocating type steel tube expansion of especially a kind of short stroke.
Background technology
In the manufacturing enterprise of present stainless steel seamless pipe, fluid pressure type steel pipe drawbench is a large amount of has substituted old-fashioned chain drawbench.And the main drive of fluid pressure type steel pipe drawbench drawing is provided by hydraulic jack, and hydraulic jack has that driving force is strong, driving force is stablized, be easy to characteristics such as control, can effectively satisfy the production requirement of drawbench.Yet existing fluid pressure type steel pipe drawbench is also because of being subjected to the travel limits of hydraulic jack, no matter is hole enlargement, tube reducing or subtracts wall processing, and the length of fished pipe is mostly below 12 meters.And for expanding machine, straight line rises the price of expanding machine with the length of oil cylinder.Price as the oil cylinder of one 300 tons/2 meters strokes is about 60,000 yuan, and the oil cylinder of one 300 tons/12 meters strokes will reach ten thousand yuan of 70-80, in order to increase the length of fished pipe, prior art can only be used the long oil cylinder of stroke, and this has increased enterprise's production cost greatly.And the steel pipe of on steel tube expansion, producing, the length of its finished product is subjected to the travel limits of hydraulic jack, and the rule root still is subjected to the restriction of pull bar total length and total kilometres on earth.But existing hydraulic cylinder piston of using on expanding machine and piston rod all are solid construction, when piston rod is gone to the stroke lowest limit, because the existence of pull bar, piston and piston rod just can not realize replying action, this drawbacks limit the total length and the total kilometres of pull bar, the length that increases fished pipe can only adopt the long oil cylinder of stroke, has increased the production cost of steel pipe greatly.
Summary of the invention
The purpose of this utility model is the reciprocating type steel tube expansion of short stroke that a kind of pull bar total length that provides for the deficiency that solves above-mentioned technology and total kilometres can not be subjected to the oil cylinder stroke restriction.
In order to achieve the above object, the reciprocating type steel tube expansion of short stroke that the utility model is designed, it mainly comprises frame, hydraulic jack, clamping structure, pull bar and hole enlargement mould, hydraulic jack is arranged on the frame, and be in transmission connection with clamping structure, pull bar one end is connected with the hole enlargement mould, and the piston rod that it is characterized in that described hydraulic jack is a hollow structure, and two ends extend out to outside the cylinder body, and described pull bar passes the hollow space of piston rod.
The reciprocating type steel tube expansion of the short stroke that the utility model obtains, simple in structure, because the hollow structure of piston rod, make the pull bar of expanding machine to be arranged in the piston rod, and pass whole cylinder that piston and piston rod can easily be realized moving back and forth, on reason, pull bar how long all can use on this expanding machine, thereby can increase the total kilometres of pull bar greatly, and the length of fished pipe no longer is subjected to the restriction of oil cylinder stroke.Adopt the expanding machine of this technology, can increase work efficiency, effectively save into the product cost.
Description of drawings
Fig. 1 is the structural representation of embodiment 1.
Among the figure: frame 1, hydraulic jack 2, clamping structure 3, pull bar 4, hole enlargement mould 5.
The specific embodiment
The utility model will be further described in conjunction with the accompanying drawings below by embodiment.
Embodiment 1
As shown in Figure 1, the reciprocating type steel tube expansion of the described short stroke of present embodiment, it mainly comprises frame 1, hydraulic jack 2, clamping structure 3, pull bar 4 and hole enlargement mould 5, hydraulic jack 2 is arranged on the frame 1, and be in transmission connection with clamping structure 3, pull bar 4 one ends are connected with hole enlargement mould 5, and the piston rod that it is characterized in that described hydraulic jack 2 is a hollow structure, and two ends extend out to outside the cylinder body, and described pull bar 4 passes the hollow space of piston rod.
When hole enlargement is produced, clamping structure 3 clamps pull bar 4, hydraulic jack 2 can drive clamping structure 3 and be with pull bar 4 operation backward together, when hydraulic jack 2 moves to the stroke lowest limit, and clamping structure 3 releasing levers 4, because pull bar 4 is located in the hollow of piston rod, hydraulic jack 2 can produce and reset, and piston rod heads on and clamps pull bar 4 and move forward, reset finish after, abovementioned steps can be proceeded, thereby the total kilometres of pull bar 4 can be increased greatly.
The reciprocating type steel tube expansion of the described short stroke of present embodiment, simple in structure, because the hollow structure of piston rod, make the pull bar 4 of expanding machine to be arranged in the piston rod, and pass whole cylinder that piston and piston rod can easily be realized moving back and forth, on reason, pull bar how long 4 all can use on this expanding machine, thereby can increase the total kilometres of pull bar 4 greatly, and the length of fished pipe no longer is subjected to the restriction of oil cylinder stroke.Adopt the expanding machine of this technology, can increase work efficiency, effectively save into the product cost.
Claims (1)
1. reciprocating type steel tube expansion of short stroke, it mainly comprises frame, hydraulic jack, clamping structure, pull bar and hole enlargement mould, hydraulic jack is arranged on the frame, and be in transmission connection with clamping structure, pull bar one end is connected with the hole enlargement mould, the piston rod that it is characterized in that described hydraulic jack is a hollow structure, and two ends extend out to outside the cylinder body, and described pull bar passes the hollow space of piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201417226U CN201684849U (en) | 2010-03-25 | 2010-03-25 | Short-stroke reciprocating steel pipe expanding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201417226U CN201684849U (en) | 2010-03-25 | 2010-03-25 | Short-stroke reciprocating steel pipe expanding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201684849U true CN201684849U (en) | 2010-12-29 |
Family
ID=43373140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201417226U Expired - Fee Related CN201684849U (en) | 2010-03-25 | 2010-03-25 | Short-stroke reciprocating steel pipe expanding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201684849U (en) |
-
2010
- 2010-03-25 CN CN2010201417226U patent/CN201684849U/en not_active Expired - Fee Related
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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: 20101229 Termination date: 20140325 |