一种偏心涨接设备
The eccentric expansion device uses an eccentric mold and a rotary drive to mechanically expand metal pipe flange assemblies, solving the problem of the inability to perform secondary processing of annular grooves in existing technologies. This achieves efficient and low-cost metal pipe flange connections, improving connection strength and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI DONGXING AIR-CONDITIONER TUBE CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing equipment and technology cannot perform secondary processing of annular grooves on the outside of two closely adjacent metal pipes on the assembled double-pipe flange assembly, resulting in high cost and complex welding process for welding connections.
An eccentric expansion joint device is used, including a worktable, a moving device, a rotary drive device, an eccentric mold, and positioning fixtures. The moving device controls the position of the rotary drive device, so that the eccentric mold is accurately inserted into the metal pipe and contacts the inner wall. The rotational extrusion action of the eccentric protrusion achieves a firm connection between the metal pipe and the flange.
It improves expansion efficiency, reduces manufacturing costs, avoids welding defects, enhances connection strength and reliability, and is suitable for metal pipe flange assemblies of different specifications and materials.
Smart Images
Figure CN224508263U_ABST
Abstract
Claims
1. An eccentric expansion joint apparatus, comprising: The device includes a worktable (100), a moving device (200), a rotary drive device (300), an eccentric mold (400), and a positioning fixture (500). The moving device (200) is located on the worktable (100) and can drive the rotary drive device (300) to move laterally and longitudinally. The positioning fixture (500) is set on the worktable (100) and is used to fix the metal pipe (601) flange (602) assembly to be expanded. One end of the eccentric mold (400) is connected to the rotation shaft of the rotary drive device (300), and the other end of the eccentric mold (400) is provided with an eccentric protrusion (401).
2. The eccentric expansion joint apparatus of claim 1, wherein, The moving device (200) includes a first base plate (201), a second base plate (202), a first drive cylinder (203), and a second drive cylinder (204). The first base plate (201) is slidably mounted on the worktable (100). The first drive cylinder (203) is connected to the first base plate (201) and is used to drive the first base plate (201) to move laterally. The second base plate (202) is slidably mounted on the first base plate (201). The second drive cylinder (204) is connected to the second base plate (202) and is used to drive the second base plate (202) to move longitudinally. The rotary drive device (300) is mounted on the second base plate (202).
3. The eccentric expansion joint apparatus of claim 2, wherein, The workbench (100) is provided with a first slide rail, the first base plate (201) is slidably mounted on the first slide rail, and a second slide rail is provided above the first base plate (201), and the second base plate (202) is slidably mounted on the second slide rail.
4. The eccentric expansion joint apparatus of claim 2 or 3, wherein, It also includes a support base (301), which is disposed on the second base plate (202). The support base (301) is located between the rotary drive device (300) and the positioning fixture (500). The two ends of the eccentric mold (400) pass through the support base (301) and are rotatably mounted on the support base (301) through bearings (302).
5. The eccentric expansion joint apparatus of any one of claims 1-3, wherein, The positioning fixture (500) includes a pipe end support (501), a positioning block (502), and a pipe tail support (503). The positioning block (502) is installed on the pipe end support (501). The positioning block (502) is provided with a front positioning groove (5041), and the pipe tail support (503) is also provided with a rear positioning groove (5042).
6. The eccentric expansion joint apparatus of claim 5, wherein, It also includes a pin (505) and a spring (506). The pin (505) is inserted through the pipe end support (503), and the spring (506) is sleeved on the pin (505). The end of the pin (505) is provided with a limiting block (507). One end of the spring (506) abuts against the limiting block (507), and the other end of the spring (506) abuts against the pipe end support (503). The end of the pin (505) corresponds to the opening of the metal pipe (601) and can slide axially and be inserted into or pulled out of the opening of the metal pipe (601).
7. The eccentric expansion joint apparatus of claim 6, wherein, It also includes a pressing positioning component, which includes a pressing block (508) and a cylinder (509). The pressing block (508) is connected to the output shaft of the cylinder (509) and is located above the pipe end support (501).
8. The eccentric expansion joint apparatus of claim 2 or 3, wherein, The first drive cylinder (203) is a cylinder (509).
9. The eccentric expansion joint apparatus of claim 8, wherein, The second drive cylinder (204) is a servo motor.
10. The eccentric expansion joint apparatus of claim 9, wherein, The rotary drive device (300) is a geared motor.