DE2264207C2 - Mechanical pipe expander with height adjustment of the tool head - Google Patents

Description

g, | ^ _h J _{aren Ex2en} ter hen with each other, which coincide with en or π _{eccentric shaft | n dem}

^ »" ^ "/ S _u S _d he eccentric disc in the other enenS utzeJJfJ"" ⁰ ^ ' _{and means for ver} .

J "tzente.l rotatable according to storage

each consist of two parts (21, 22) which are connected to one another via a rotatable eccentric, the eccentric shaft 17) being rotatably mounted in one support part (22) and the eccentric disk (16) in the other support part (21) and means (15 ) _{Z in} order to jam the eccentric disk (16) in its mounting are provided and that the diameters of all eccentric disks (16) and their eccentric radii adapted to the range of the desired height adjustability are equal to one another.

2. Mechanical pipe expander according to * 5 claim 1, characterized in that the eccentric disk (16) each in the fixed foot part (22, 22 ') of the support and the eccentric shaft in the Lurked upper part (21) of the support and the drive device (20) for rotating the eccentric shaft attached to the eccentric shaft and via a Torque support (25) is supported.

3. Mechanical pipe expander according to one of claims 1 and 2. aadirc Λ uekmarks that the eccentric shaft (17) of the front and the eccentric shaft of the rear support are connected via a switchable coupling (19) to a single drive motor (20). '

40 ^{adapted eccentrics} -

, _the invention is characterized in that the

Height adjustment

Eccentric disc ^

Stütze and J

stored and the ^ f

the eccentric shaft at d.c ^

how about erne torque * uuz.

This version enables a s.no.

The invention relates to a mechanical pipe expander for the step-by-step expansion of large pipes of different diameters, the replaceable ones Werkzcuckopf opposite the constant height level the fixed pipe support over long-variable Supports between the base frame and the expander head via a pull rod and a hydraulic slider supporting a hollow spar is height adjustable.

It is known to the applicant from practice, the expansion unit of a mechanical pipe expander adjustable in height by means of four spindles. Here, however, is the even drive distribution on the four spindles very complicated. Also brings the provided parallel guidance of the Expansion unit in the whole system a certain amount of play With the increasingly larger building units mechanical pipe expander, but also with smaller units, this game of Disadvantage because straightening forces for the pipe act on the tool head of the expansion unit and these forces over the laimen lever of the "hollow spar of the Means provided for the height adjustment must be included as countermomcnl.

_The further development of the invention suggests that the eccentric parts and the eccentric shaft of the lower support are connected to a control unit via a switchable coupling. The ^^^ "^ PP ¹ ""^". enable a single drive of the front and rear eccentrics, ^ "^; ^
Expanders are made ^ ^

Stical deflection of the hollow hoop is conditional durd, the dead weight is the weight of the entrances and the tool head, again also The tool head can always be in a horizontal position Be brought to bear even if s.ch d.c Gc *, ch s-ratios, which cause elastic deflection, by using a larger or smaller I-apander head to change.

In the drawings the invention is on dog explained by examples. It shows

1 shows a height-adjustable mechanical Pipe expander,

Fi ^. 2 shows a detail from FIG. 1, namely the Devices for height adjustment in a scene view.

Fig. 3 shows the devices for height adjustment in Cut.

The in F i g. 1 mechanical pipe expanders shown consists essentially of the tool head from parts 1. 2. 3 and 4 of a pull rod r, and a hollow spar 6, a hydraulic displacement device IO and the base frame 14.

The tool head is composed of a pyramidal polygon 2 on which the pull rod 5 angrcilt via the tie rod nut 1 and remove it Side surfaces of the pyramidal ViclkantsZ superimposed Segments 3. Which are supported on an intermediate piece 4. The intermediate piece 4 is different hollow spar 6 and this via a housing 7 the cylinder of the hydraulic sliding device 10 connected. The expansion is done by moving the pyramidal polygon, which is the Movement of the tie rod 5. via a coupling nut S is connected to the piston rod 9 of the hydraulic displacement device 10, wherein the segments 3 move outwards, to the plant on the inner wall of a pipe 24 to be expanded

come and finally expand this by a predetermined amount.

The part which is stationary during the expansion and which carries the hollow spar 6 with the expander head of the mechanical pipe expander is connected to the foundation 14 via height-adjustable supports. The supports each consist of two parts 21, 22 and 21, 22 ', the upper movable part 21 as formed a continuous support and the front support with the fixed foot part 22 'and the rear support with the fixed Fußtdl 22 is common. In Fig. 1 a support is also shown 11 for the expander head, another support 12, which evades accordingly as soon as the pipe 24 passes over them. A support device 13 is used to further support the pipe 24.

The devices for height adjustment are shown in FIGS. 2 and 3 shown in somewhat more detail. In terms of height Fixed parts are, as already stated, the fixed parts 22, 22 'of the supports and the eccentric shafts 17 rotatably mounted therein. Eccentric disks 16 are attached to the eccentric shafts 17, The eccentric disks 16 can be clamped via clamping means IS in the upper part 21 of the supports. To the Adjusting the height, the clamping means 15 are released and tightened again as soon as the adjustment is carried out is. In this way, practically any play can be avoided via the clamping means IS.

In Fig. 3 details of the rear support are shown and it can be seen that on the eccentric width 17 two eccentric disks 16 are provided. A drive motor 20 with a foundation is used for the drive 25 support as a torque, which via switchable shaft couplings 19 each have a worm wheel 18 and This drives a gear 23 arranged on the eccentric shaft 17.

1 sheet of drawings

Claims (1)

Patent claims: 1. Mechanical pipe expander for gradual Expansion of large pipes of different diameters, their interchangeable tool head compared to the constant height level the fixed pipe support over long variable supports between the base frame and The object of the invention is to provide a Böhenverstellhnrkeit for a mechanical pipe expander to An. the ώ BciU to a backlash-free system