CN201177106Y

CN201177106Y - Expander roll device

Info

Publication number: CN201177106Y
Application number: CNU2008200854469U
Authority: CN
Inventors: 曹忠泉
Original assignee: Individual
Current assignee: ZHEJIANG DAYANG SEWING MACHINE CO Ltd
Priority date: 2008-04-10
Filing date: 2008-04-10
Publication date: 2009-01-07
Anticipated expiration: 2018-04-10

Abstract

The utility model relates to a tube and a tube plate expansion joint technology, in particular to an expanding arbor device. An expanding arbor (1) is provided with an axial central hole (2) and a radial hole (3) communicated with the axial central hole (2), two sides of the radial central hole (3) are provided with a concave ring (5) matched with an O-shaped sealing ring (4), the middle part of the expanding arbor (1) is provided with a convex ring (8), and the concave ring (5) matched with the O-shaped sealing ring (4) is positioned on two sides of the convex ring (8). The expanding arbor has parts with reducing diameters from two sides of the convex ring (5) to two ends of the expanding arbor, the small-diameter end of the expanding arbor is sleeved with a rubber gasket (9) and a positioning sleeve (11) from the inside to the outside. The technology can prolong the service life of the expanding arbor, save cost, is not susceptible changes in diameter while performing expansion joint to the thinner tubes, and guarantees the processing quality.

Description

The expander roll device

Technical field

The utility model relates to the expanded joint technology of tube-to-tube sheet connection, particularly a kind of expander roll device.

Background technique

The expanded joint of existing tube-to-tube sheet connection extensively adopts the hydraulic expanding tube technology.Hydraulic expanding tube has expand tube efficient height, it is reliable to connect, have no mechanical damage, pipe does not produce advantages such as axial elongation, and expander roll is a major part in the expand tube assembly parts.During present Hydraulic expansion-jointing, liquid is by the axial center hole and the radially little cross-drilled hole feed liquor bag of expander roll, utilizes the expansive force of liquid bag to realize the expanded joint of tube-to-tube sheet connection.Because liquid bag surface tension when carrying out the pipe expanded joint that tube wall is approached, is easy to generate the reducing phenomenon, promptly the middle part slightly larger in diameter influences quality of processing in the diameter at two ends.

The model utility content

The purpose of this utility model is at above-mentioned technical problem, provides-kind be particularly suitable for the expander roll of thin pipe expanded joint of tube wall, and it can eliminate the reducing phenomenon that is occurred when the expanded joint by expand tube effectively.

The utility model adopts following technological scheme:

The radial hole that a kind of expander roll device, expander roll are provided with axial center hole and communicate with it is characterized in that the both sides of radial hole are shaped on the scrobicular ring that cooperates with O-ring seals.

Make a bulge loop at the expander roll middle part, described radial hole passes at this bulge loop, and the described scrobicular ring that cooperates with O-ring seals is positioned at the both sides of bulge loop.

The expander roll tapered diameter of one segment distance of described scrobicular ring two side direction expander roll direction of both ends.

Diameter small end place at expander roll is with rubber washer and setting sleeve from inside to outside successively.

When charging into pressurized gas, the above-mentioned O-ring seals that is positioned on the scrobicular ring is outwards squeezed to be pushed into packing ring to be close to, and makes the space between two O-ring seals constitute expansion chamber.

The utlity model has following advantage: owing to O-ring seals has been installed in radial hole port both sides, when charging into pressurized gas, the O-ring seals that is positioned on the scrobicular ring is close to by outside crowded being pushed into packing ring, make the space between two O-ring seals constitute expansion chamber, and the gas pressure in the expansion chamber is even, particularly when the pipe expanded joint that tube wall is approached, be not easy to produce the reducing phenomenon, guaranteed quality of processing.The utility model can prolong the working life of expander roll, saves production cost, and reaches at expanded joint pressure that expander roll of the present invention can also normally use under the situation of 500MPa.

Description of drawings

Schematic representation when Fig. 1 is the utility model tube plate expanded-connecting original state.

Schematic representation when Fig. 2 is the utility model tube plate expanded-connecting end of a period state.

Embodiment

The invention will be further described below in conjunction with accompanying drawing:

The structure of expander roll described in the utility model as shown in FIG., the inside of expander roll 1 makes an axial center hole 2, or title air flue, central region at expander roll is shaped on a bulge loop 8, obliquely from this bulge loop surface open system radial hole 3 and is communicated with axial center hole 2 to the axle center, the root that is positioned at bulge loop 8 both sides respectively has one confession that the scrobicular ring 5 of O-ring seals 4 is set.The expander roll tapered diameter of one segment distance of 5 liang of side direction expander rolls of scrobicular ring direction of both ends (the bloated length of quilt on pipe is decided), this section that also is expander roll is substantial taper type, the diameter H of close scrobicular ring 5 ends is greater than the diameter h away from scrobicular ring 5 ends, like this, when from axial center hole 2 and radial hole 3 feeding pressurized gas, O-ring seals 4 can continue outwards to slide in opposite directions after outwards being squeezed and pushing away out scrobicular ring 5.Be with the auxiliary of rubber washer 9 and setting sleeve 11 and this setting sleeve from inside to outside successively at the diameter small end place of expander roll, when outwards being squeezed along the conical surface, O-ring seals 4 pushes away when being close to packing ring 9, continue the rising inflation pressure, force O-ring seals 4 and packing ring 9 compressive deformations, external diameter increases, with be close to sealing by the expand tube inwall, space between two O-ring seals 4 constitutes expansion chamber 10, pressure in the expansion chamber 10 is high more, O-ring seals 4 and packing ring 9 amount of deformation are big more, the sealing of expansion chamber is good more, thereby realizes by the expanded joint of expand tube 6 and tube sheet 7.If when needing to change by expand tube length, the auxiliary that only needs to change setting sleeve 11 and this setting sleeve also promptly changes the length of expansion chamber in the position of expander roll.

Claims

1, the radial hole (3) that a kind of expander roll device, expander roll (1) are provided with axial center hole (2) and communicate with it is characterized in that the both sides of radial hole (3) are with O-ring seals (4).

2, expander roll device according to claim 1 is characterized in that expander roll (1) middle part makes a bulge loop (8), and described radial hole (3) passes at this bulge loop, and the scrobicular ring (5) that cooperates with O-ring seals (4) is positioned at the both sides of bulge loop (8).

3, expander roll device according to claim 2 is characterized in that the expander roll tapered diameter of a segment distance of scrobicular ring (5) two side direction expander roll direction of both ends.

4, expander roll device according to claim 3 is characterized in that the diameter small end place of expander roll (1) is with rubber washer (9) and setting sleeve (11) from inside to outside successively.

According to claim 1 or 4 described expander roll devices, it is characterized in that when charging into pressurized gas that 5, the above-mentioned O-ring seals (4) that is positioned on the scrobicular ring is outwards squeezed to be pushed into packing ring (9) to be close to, and makes the space between two O-ring seals constitute expansion chamber (10).