CN211638050U - A tube expander for bushing pipe expanded joint - Google Patents
A tube expander for bushing pipe expanded joint Download PDFInfo
- Publication number
- CN211638050U CN211638050U CN201922376655.XU CN201922376655U CN211638050U CN 211638050 U CN211638050 U CN 211638050U CN 201922376655 U CN201922376655 U CN 201922376655U CN 211638050 U CN211638050 U CN 211638050U
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- rod
- rear end
- periphery
- sets
- conical rod
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- 125000003003 spiro group Chemical group 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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Abstract
A tube expander for expanding and connecting a liner tube is characterized in that a cap nut is arranged at the front end of a conical rod, a positioning sleeve is arranged at the front part of the periphery of the conical rod, a needle roller retainer is arranged at the periphery of the conical rod between the cap nut and the positioning sleeve, the rear end of the needle roller retainer is in contact with the front end of the positioning sleeve, needle rollers are uniformly distributed in the needle roller retainer, and the needle rollers are in contact with the periphery of the conical rod; the utility model discloses control accuracy is high, eliminates the heat exchange tube expanded joint swell phenomenon, has satisfied the expanded joint requirement of bushing pipe of pressure vessel product, improves product quality, the utility model discloses low in manufacturing cost, excellent in use effect.
Description
Technical Field
The utility model relates to a pipe expander field especially relates to a pipe expander for bushing pipe expanded joint.
Background
After the liner tube is installed on a pressure container product, in order to avoid gap corrosion, and simultaneously in order to prevent the liner tube from falling off, the liner tube needs to be expanded and connected, so that the outer wall of the liner tube is tightly attached to the inner wall of a heat exchange tube, but when a general mechanical tube expander is adopted, the expansion degree of the liner tube after expansion connection cannot be accurately controlled, and the expansion connection bulge of the heat exchange tube is caused, so that the product quality is reduced.
In view of the above, an expander for liner expansion has been developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the prior art, provide an expander that is used for bushing pipe expanded joint, control accuracy is high, eliminates the heat exchange tube expanded joint swell phenomenon, has satisfied the bushing pipe expanded joint requirement of pressure vessel product, improves product quality.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: an expander for expanding a liner, comprising: the needle roller retainer, the cap nut, the positioning sleeve, the needle roller, the square tenon, the conical rod, the circular rod and the screw rod; the front end of the taper rod is provided with a cover-shaped nut, the front part of the periphery of the taper rod is provided with a positioning sleeve, the periphery of the taper rod between the cover-shaped nut and the positioning sleeve is provided with a needle roller retainer, the rear end of the needle roller retainer is contacted with the front end of the positioning sleeve, needle rollers are uniformly distributed in the needle roller retainer, and the needle rollers are contacted with the periphery of the taper rod.
The structure of the taper rod is as follows: the front end of the conical rod is provided with a screw rod, the cap-shaped nut corresponds to the screw rod in a screwed mode, the rear end of the conical rod is provided with a round rod, the rear end of the round rod is provided with a square tenon, the horizontal center lines of the square tenon, the conical rod, the round rod and the screw rod are located on the same plane, the square tenon, the conical rod, the round rod and the screw rod are integrally formed, the needle roller retainer and the positioning sleeve are arranged on the periphery of the conical rod, and the rear end face of the positioning sleeve is in contact with the front end face of the round.
The diameter of the front end of the conical rod is smaller than that of the rear end of the conical rod, the diameter of the front end of the conical rod is larger than that of the threaded rod, and the diameter of the rear end of the conical rod is smaller than that of the circular rod.
The utility model has the advantages that: the utility model discloses control accuracy is high, eliminates the heat exchange tube expanded joint swell phenomenon, has satisfied the expanded joint requirement of bushing pipe of pressure vessel product, improves product quality, the utility model discloses low in manufacturing cost, excellent in use effect, convenient to popularize and apply.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic view of the assembly structure;
FIG. 2 is a schematic view of a taper rod structure;
FIG. 3 is a schematic sectional view of the needle roller cage;
in fig. 1, 2, 3: the needle roller fixing device comprises a needle roller retainer 1, a cap-shaped nut 2, a locating sleeve 3, a needle roller 4, a square tenon 5, a conical rod 6, a circular rod 7 and a screw rod 8.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings:
the front end of the taper rod is provided with a cap-shaped nut 2, the front part of the periphery of the taper rod is provided with a positioning sleeve 3, the periphery of the taper rod between the cap-shaped nut 2 and the positioning sleeve 3 is provided with a needle roller retainer 1, the rear end of the needle roller retainer 1 is contacted with the front end of the positioning sleeve 3, needle rollers 4 are uniformly distributed in the needle roller retainer 1, and the needle rollers 4 are contacted with the periphery of the taper rod.
The structure of the taper rod is as follows: the front end of conical rod 6 sets up lead screw 8, lid nut 2 corresponds the spiro union with lead screw 8, the rear end of conical rod 6 sets up circular rod 7, the rear end of circular rod 7 sets up square tenon 5, conical rod 6, the level of circular rod 7 and lead screw 8 is located the coplanar to the central line, square tenon 5, conical rod 6, circular rod 7 and lead screw 8 integrated into one piece, bearing cage 1 and position sleeve 3 all set up in the periphery of conical rod 6, the rear end face of position sleeve 3 and the preceding terminal surface contact of circular rod 7.
The diameter of the front end of the conical rod 6 is smaller than that of the rear end, the diameter of the front end of the conical rod 6 is larger than that of the screw rod 8, and the diameter of the rear end of the conical rod 6 is smaller than that of the circular rod 7.
Claims (3)
1. An expander for expanding a liner, comprising: the needle roller fixing device comprises a needle roller retainer (1), a cap-shaped nut (2), a positioning sleeve (3), needle rollers (4), a square tenon (5), a conical rod (6), a circular rod (7) and a screw rod (8); the method is characterized in that: the taper rod front end sets up lid shape nut (2), and taper rod periphery front portion sets up position sleeve (3), and the taper rod periphery between lid shape nut (2) and position sleeve (3) sets up bearing cage (1), and the rear end of bearing cage (1) and the front end contact of position sleeve (3), evenly distributed kingpin (4) in bearing cage (1), kingpin (4) and taper rod periphery contact.
2. An expander for liner expansion according to claim 1, wherein: the structure of the taper rod is as follows: the front end of toper pole (6) sets up lead screw (8), cap nut (2) correspond the spiro union with lead screw (8), the rear end of toper pole (6) sets up round bar (7), the rear end of round bar (7) sets up square tenon (5), toper pole (6), the level of round bar (7) and lead screw (8) is located the coplanar to the central line, square tenon (5), toper pole (6), round bar (7) and lead screw (8) integrated into one piece, bearing cage (1) and position sleeve (3) all set up in the periphery of toper pole (6), the rear end face of position sleeve (3) and the preceding terminal surface contact of round bar (7).
3. An expander for liner expansion according to claim 2, wherein: the diameter of the front end of the conical rod (6) is smaller than that of the rear end, the diameter of the front end of the conical rod (6) is larger than that of the screw rod (8), and the diameter of the rear end of the conical rod (6) is smaller than that of the circular rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922376655.XU CN211638050U (en) | 2019-12-26 | 2019-12-26 | A tube expander for bushing pipe expanded joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922376655.XU CN211638050U (en) | 2019-12-26 | 2019-12-26 | A tube expander for bushing pipe expanded joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211638050U true CN211638050U (en) | 2020-10-09 |
Family
ID=72699265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922376655.XU Active CN211638050U (en) | 2019-12-26 | 2019-12-26 | A tube expander for bushing pipe expanded joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211638050U (en) |
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2019
- 2019-12-26 CN CN201922376655.XU patent/CN211638050U/en active Active
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