CN201235382Y - Liquid bag apparatus of tube expanding mechanism - Google Patents

Abstract

The utility model relates to the expansion joint technique between a pipe and a pipe plate, in particular to an infusion bag device of a pipe expanding mechanism, which comprises an expanding arbor (7), wherein a central hole (71) and a radial hole which is communicated with the central hole are arranged on the expanding arbor (7), a tubular infusion bag (5) is sleeved outside the expanding arbor (7), a plane retainer ring (4), a conical retainer ring (3) and an elastic ring (2) are respectively sleeved on both ends of the infusion bag, the port of the tubular infusion bag (5) which is made of macromolecule rubber and is sleeved outside the expanding arbor (7) is turned over inwards, and two shoulders which respectively prop up a locating ring (1) and an elastic ring (2) are arranged on the expanding arbor (7). Since the port of the tubular infusion bag which is made of the macromolecule rubber is turned over inwards, when high-pressure gas-liquid is injected, the turnover port which is positioned on the infusion bag and is provided with a bigger clinging surface with the plane retainer ring realizes the automatic sealing function, the arranged plane retainer ring can enable the expansion joint length between the pipe and the pipe plate to be adjustable, the arranged locating ring also can enable the expansion joint length between the pipe and the pipe plate to be adjustable, the manufacturing quality is guaranteed and the manufacturing cost is saved.

Description

The liquid bagging apparatus of expand tube mechanism

Technical field

The utility model relates to the improvement of the liquid bagging apparatus of the expanded joint technology of tube-to-tube sheet connection, particularly expand tube mechanism.

Background technology

The expanded joint of existing tube-to-tube sheet connection extensively adopts the hydraulic expanding tube technology, have the efficient height, connect reliable, have no mechanical damage, pipe do not produce advantages such as axial elongation.Comparatively advanced is the Hydraulic expansion-jointing technology at present, and liquid is compressed into the liquid bag that macromolecular material is made by the axial center hole and the radially little cross-drilled hole of expander roll, utilizes the expanded joint of the expansive force realization tube-to-tube sheet connection of liquid bag.Because existing liquid bag is the concordant sleeve-shaped of port,, will produce the slit with the plug at its two ends if port is slightly gradient or uneven, high pressure does not get on, influence the expanded joint quality, and the length of liquid bag is unadjustable, when the expanded joint length of tube-to-tube sheet connection changes, just needs to change the liquid bag.

The utility model content

The purpose of this utility model is at above-mentioned technical problem, provides-kind of favorable sealing property, the liquid bagging apparatus of the expand tube mechanism of expanded joint adjustable in length, effectively guarantees the expanded joint quality.

The utility model adopts following technical scheme to be:

The liquid bagging apparatus of a kind of expand tube mechanism, comprise the radial hole that expander roll, expander roll are shaped on axial center hole and communicate with it, expander roll is with tubulose liquid bag outward, liquid bag two ends are with conical surface back-up ring and elastic ring, it is characterized in that also being with the plane back-up ring between liquid bag and the conical surface back-up ring, the port that is placed in the outer tubulose liquid bag of being made by polymer rubber of expander roll inwardly turns down; Expander roll is shaped on respectively two shoulders that push up mutually with locating ring and elastic ring.

The utlity model has following advantage: because the port of the tubulose liquid bag of being made by polymer rubber inwardly turns down, when charging into high-pressure gas-liquid, the turnover port that is positioned at the liquid bag have with the plane back-up ring bigger be close to face, realize self-sealing function; The plane back-up ring that is provided with can make the expanded joint adjustable in length of tube-to-tube sheet connection, and the locating ring of setting can make the expanded joint position-adjustable of tube-to-tube sheet connection, has guaranteed crudy, saves production cost.

Description of drawings

Fig. 1 is the utility model tube plate expanded-connecting structural representation.

Fig. 2 is the self-sealing function schematic diagram of liquid bag.

The specific embodiment

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

The liquid bagging apparatus structure of expand tube described in the utility model mechanism as shown in Figure 1, the inside of expander roll 7 makes an axial center hole 71, or claims air flue, opens the system radial hole and is communicated with axial center hole 71 and liquid bag inner chamber to the axle center.Liquid bag 5 two ends are with plane back-up ring 4, conical surface back-up ring 3 and elastic ring 2 successively, and its outer suit is again taken over; Plane back-up ring 4 has the specification of different-thickness, changes plane back-up ring 4 fine-tuning expanded joint length; Conical surface back-up ring 4 one sides are the plane, and opposite side is the conical surface, and its planar side cooperates with liquid bag 3, and conical surface side cooperates with elastic ring 2; The port of the tubulose liquid bag of being made by polymer rubber 5 inwardly turns down, and when charging into high-pressure gas-liquid, the liquid bag is radially expanded, and the turnover radian of liquid bag becomes gently, makes itself and plane back-up ring 4 have the bigger face of being close to, and realizes self-sealing function, shown in A among Fig. 2; In the expanded joint process, if when need changing expanded joint length, can change the liquid bag in turn over length, also promptly change the length of expansion chamber.Conical surface back-up ring 3 forces elastic ring 2 radial deformations owing to be subjected to axial force, makes the elastic ring 2 and the fastening applying of inwall of being joined two pipes together; The high pressure of expander roll 7 charges into end and is shaped on the shoulder 72 that push up mutually with locating ring 1, is used for being taken over the location, if need joined two pipes together expanded joint position with tube sheet 8 of change, can use the locating ring 1 of different-thickness instead.The middle part of expander roll 7 is shaped on the shoulder 73 that pushes up mutually with elastic ring 2, limits the position of elastic ring 2.The tail end of expander roll 7 has hood-shaped lock nut 6, the liquid bag 5 of suit, plane back-up ring 4, conical surface back-up ring 3 and elastic ring 2 on one's body securing rod, hood-shaped lock nut 6 has the long face of pulling, to avoid the thin nut of original employing to be taken over the inconvenience of blocking easily, can prevent that also the expander roll screw thread is bruised.

Claims (2)

1, the liquid bagging apparatus of a kind of expand tube mechanism, comprise the radial hole that expander roll (7), expander roll (7) are shaped on axial center hole (712) and communicate with it, the outer tubulose liquid bag (5) that is with of expander roll (7), liquid bag two ends are with conical surface back-up ring (3) and elastic ring (2), it is characterized in that also being with plane back-up ring (4) between liquid bag (5) and the conical surface back-up ring (3), the port that is placed in the outer tubulose liquid bag of being made by polymer rubber (5) of expander roll (7) inwardly turns down; Expander roll (7) is shaped on respectively two shoulders that push up mutually with locating ring (1) and elastic ring (2).

2, the liquid bagging apparatus of expand tube according to claim 1 mechanism is characterized in that the tail end of expander roll (7) has hood-shaped lock nut (6).

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