CN208303694U - Pusher hot tube expanding machine plug with air discharge duct - Google Patents
Pusher hot tube expanding machine plug with air discharge duct Download PDFInfo
- Publication number
- CN208303694U CN208303694U CN201820820657.6U CN201820820657U CN208303694U CN 208303694 U CN208303694 U CN 208303694U CN 201820820657 U CN201820820657 U CN 201820820657U CN 208303694 U CN208303694 U CN 208303694U
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- China
- Prior art keywords
- section
- cylindrical
- discharge duct
- air discharge
- engaging portion
- 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
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Abstract
Pusher hot tube expanding machine plug with air discharge duct, including conical deformation section, cylindrical sizing section and cone alignment section, the engaging portion of the big end of conical deformation section and cylindrical sizing section uses arc transition, the outside diameter D2 of cone alignment section is less than the diameter D1 of cylindrical sizing section, forms the step that a height is h in the big end of cone alignment section and the engaging portion of cylindrical sizing section.The arc-shaped ring row air drain in a circle bottom is equipped on the cylindrical surface of the engaging portion of the big end and cylindrical sizing section of conical deformation section, ring row air drain is not closed, a ring cross-section shape and the equiform helical form air discharge duct of annular vent slot cross-section are equipped with around the cylindrical surface of cylindrical sizing section, one end of helical form air discharge duct is connect with the fracture end of ring row air drain one end, and the other end extends to the engaging portion of cylindrical sizing section and cone alignment section.The width L of ring row air drain is 3~4mm, and depth H is less than or equal to h.
Description
Technical field
The utility model relates to seamless steel tube production technical fields, and in particular to a kind of push type hot tube expanding machine plug.
Background technique
With the maturation of oil-gas pipeline conveying technology, used seamless steel pipe to heavy caliber, thin-walled develop, heavy caliber without
Seam steel pipe can be produced by hot rolling mode, but using hot rolling mode produce large-diameter and thin-wall pipe when, the thickness of tube wall is difficult to control,
The required precision in uneven thickness for not being able to satisfy steel-pipe welding of tube wall, meanwhile, the investment of heavy caliber seamless steel pipe Hot Rolling Mill
And high production cost.
Existing production large-diameter thin-wall seamless steel pipe is using thermal expansion process, by hot tube expanding machine by the lesser heat of bore
It rolls seamless steel pipe and is processed into large-caliber thin-walled steel pipe, the large-diameter thin-wall seamless steel pipe production cost of this method production is low, pipe
The thickness of wall is uniform, is able to satisfy the required precision of steel-pipe welding.
For existing push type hot tube expanding machine plug as shown in attached drawing 1,2, plug includes conical deformation section 1, cylindrical sizing
The engaging portion of section 2 and cone alignment section 3, the big end of conical deformation section 1 and cylindrical sizing section 2 uses arc transition, circle
The outside diameter D2 that taper is straightened section 3 is less than the diameter D1 of cylindrical sizing section 2, in the big end and cylinder of cone alignment section 3
The engaging portion of shape sizing section 2 forms the step that a height is h.
The characteristics of thermal expansion process is induction heating steel pipe partial, and heating coil and plug are fixed, pusher hot tube expanding machine with
Certain speed pushes steel pipe to advance, and steel pipe is expanded to required outer diameter by deformation section 1, through cylindrical 2 sizing of sizing section, then passes through
Cone alignment 3 school of section circle is at large-caliber thin-walled hot-expanding pipe.When thermal expansion, the hollow billet inner wall of hot-expanding pipe needs to lubricate, and lubricant is stone
The mixture that ink powder, graphite flakes and water prepare by a certain percentage.Hollow billet is in thermal expansion sizing, the inner wall and cylinder of hot-expanding pipe
Sizing section 2 is combined closely, and heating temperature highest point is just in cylindrical sizing section 2, about 730 degree of heating temperature or so, wet when thermal expansion
The graphite of profit generates steam not evaporate suddenly, will result in hot-expanding pipe bulge, influences the quality of hot-expanding pipe.
Summary of the invention
A kind of push type heat with air discharge duct is provided the purpose of the utility model is to overcome the above-mentioned insufficient of the prior art
Expander core rod.
The technical solution of the utility model is: the pusher hot tube expanding machine plug with air discharge duct, including conical deformation section,
The engaging portion of cylindrical sizing section and cone alignment section, the big end of conical deformation section and cylindrical sizing section uses circular arc mistake
It crosses, the outside diameter D2 of cone alignment section is less than the diameter D1 of cylindrical sizing section, in the big end and circle of cone alignment section
The engaging portion of cylindricality sizing section forms the step that a height is h.Big end and cylindrical sizing section in conical deformation section
The cylindrical surface of engaging portion is equipped with the arc-shaped ring row air drain in a circle bottom, and ring row air drain is not closed, around cylinder
The cylindrical surface of sizing section is equipped with a ring cross-section shape and the equiform helical form air discharge duct of annular vent slot cross-section, helical form row
One end of air drain is connect with the fracture end of ring row air drain one end, and the other end extends to cylindrical sizing section and cone alignment section
Engaging portion.
The width L of ring row air drain is 3~4mm, and depth H is less than or equal to h.
When using pusher hot tube expanding machine plug hot-expanding steel tube with air discharge duct, wet graphite generates steam can be along ring
Shape air discharge duct and helical form air discharge duct are discharged to cone alignment section, and not will cause hot-expanding pipe bulge influences the quality of hot-expanding pipe.
The utility model has a characteristic that compared with prior art
When using the pusher hot tube expanding machine plug hot-expanding steel tube provided by the utility model with air discharge duct, wet graphite
The steam of generation can be discharged to cone alignment section 3 along ring row air drain 2-1 and helical form air discharge duct 2-2, not will cause thermal expansion
The quality of pipe bulge influence hot-expanding pipe.
It is further described below in conjunction with detailed construction of the drawings and specific embodiments to the utility model.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of existing pusher hot tube expanding machine plug；
Attached drawing 2 is the left view of attached drawing 1；
Attached drawing 3 is the pusher hot tube expanding machine mandrel structure schematic diagram provided by the utility model with air discharge duct.
Specific embodiment
Embodiment one, the pusher hot tube expanding machine plug with air discharge duct, including conical deformation section 1, cylindrical sizing section 2
And cone alignment section 3, the big end of conical deformation section 1 and the engaging portion of cylinder sizing section 2 use arc transition, cone
The outside diameter D2 for being straightened section 3 is less than the diameter D1 of cylindrical sizing section 2, fixed in the big end and cylinder of cone alignment section 3
The engaging portion of diameter section 2 forms the step that a height h is 1mm.Big end and cylindrical sizing section 2 in conical deformation section 1
The cylindrical surface of engaging portion is equipped with the arc-shaped ring row air drain 2-1 in a circle bottom, and ring row air drain 2-1 is not closed, around
The cylindrical surface of cylindrical sizing section 2 is equipped with helical form exhaust of the ring cross-section shape as ring row air drain 2-1 cross sectional shape
One end of slot 2-2, helical form air discharge duct 2-2 are connect with the fracture end of the one end ring row air drain 2-1, and the other end extends to cylinder
The engaging portion of sizing section 2 and cone alignment section 3.The width L of ring row air drain 2-1 is 3mm, depth H 0.8mm.
When using pusher hot tube expanding machine plug hot-expanding steel tube with air discharge duct, wet graphite generates steam can be along ring
Shape air discharge duct 2-1 and helical form air discharge duct 2-2 is discharged to cone alignment section 3, and not will cause hot-expanding pipe bulge influences hot-expanding pipe
Quality.
Embodiment two, the pusher hot tube expanding machine plug with air discharge duct, including conical deformation section 1, cylindrical sizing section 2
And cone alignment section 3, the big end of conical deformation section 1 and the engaging portion of cylinder sizing section 2 use arc transition, cone
The outside diameter D2 for being straightened section 3 is less than the diameter D1 of cylindrical sizing section 2, fixed in the big end and cylinder of cone alignment section 3
The engaging portion of diameter section 2 forms the step that a height h is 1mm.Big end and cylindrical sizing section 2 in conical deformation section 1
The cylindrical surface of engaging portion is equipped with the arc-shaped ring row air drain 2-1 in a circle bottom, and ring row air drain 2-1 is not closed, around
The cylindrical surface of cylindrical sizing section 2 is equipped with helical form exhaust of the ring cross-section shape as ring row air drain 2-1 cross sectional shape
One end of slot 2-2, helical form air discharge duct 2-2 are connect with the fracture end of the one end ring row air drain 2-1, and the other end extends to cylinder
The engaging portion of sizing section 2 and cone alignment section 3.The width L of ring row air drain 2-1 is 4mm, depth H 1.0mm.
When using pusher hot tube expanding machine plug hot-expanding steel tube with air discharge duct, wet graphite generates steam can be along ring
Shape air discharge duct 2-1 and helical form air discharge duct 2-2 is discharged to cone alignment section 3, and not will cause hot-expanding pipe bulge influences hot-expanding pipe
Quality.
Claims (2)
1. the pusher hot tube expanding machine plug with air discharge duct, including conical deformation section, cylindrical sizing section and cone alignment
The engaging portion of section, the big end of conical deformation section and cylindrical sizing section uses arc transition, and the big end of cone alignment section is straight
Diameter D2 is less than the diameter D1 of cylindrical sizing section, forms one in the big end of cone alignment section and the engaging portion of cylindrical sizing section
A height is the step of h；It is characterized in that: on the cylindrical surface of the engaging portion of the big end and cylindrical sizing section of conical deformation section
Equipped with the arc-shaped ring row air drain in a circle bottom, ring row air drain is not closed, and the cylindrical surface around cylindrical sizing section is set
There are a ring cross-section shape and the equiform helical form air discharge duct of annular vent slot cross-section, one end of helical form air discharge duct and annular
The fracture end of air discharge duct one end connects, and the other end extends to the engaging portion of cylindrical sizing section and cone alignment section.
2. the pusher hot tube expanding machine plug with air discharge duct as described in claim 1, it is characterized in that: cone alignment section is big
The height h of end and cylindrical sizing section engaging portion step is 1mm, and the width L of ring row air drain is 3~4mm, depth H be less than or
Person is equal to h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820820657.6U CN208303694U (en) | 2018-05-30 | 2018-05-30 | Pusher hot tube expanding machine plug with air discharge duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820820657.6U CN208303694U (en) | 2018-05-30 | 2018-05-30 | Pusher hot tube expanding machine plug with air discharge duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208303694U true CN208303694U (en) | 2019-01-01 |
Family
ID=64716791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820820657.6U Expired - Fee Related CN208303694U (en) | 2018-05-30 | 2018-05-30 | Pusher hot tube expanding machine plug with air discharge duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208303694U (en) |
-
2018
- 2018-05-30 CN CN201820820657.6U patent/CN208303694U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 Termination date: 20200530 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |