CN85106224A - A kind of device of clamping tube internally - Google Patents

Abstract

A kind of being used for from managing the device of inner clamping tube, this device comprises that one is placed on the central axis, passes across the guide rod of the hollow body that can move in pipe; Include pressure chamber, the piston of a sleeve-shaped is arranged in each pressure chamber, piston is positioned on the guide rod and around the guide rod motion, pressure chamber is placed in the both sides of hollow body; Corresponding to each pressure chamber, dispose the fluid delivery port and delivery port is configured in hollow body one side, also comprise the many scalable claw that is placed in by on the welded tube corresponding end, greatly about the configuration of the middle part of hollow body, claw is by piston actuated around hollow body for claw.This device is in manage, the pipe that relies on many outstanding claws to support to prepare welding, and its limit end is clamped on the preposition.

Description

A kind of device of clamping tube internally

The present invention relates to employed inner clamping device on a kind of intermediate diameters pipe that links together by the butt welding method, this device is from tube interior clamping two tubes, and it is fixed on certain position.

For making the pipe after the butt welding obtain high-quality, when preparing welding, need be processed into suitable bevel for welding at tube end, so that obtain appropriate groove gap, reach accurately centering, like this, can reduce the deviation between two surfaces in the groove.Up to the present, when two pipes of butt welding, often adopt following welding procedure to satisfy above-mentioned requirements.The isodiametric pipe of centering (between about 2～20 inches of the tube outer diameter) is when welding, as shown in Fig. 1 a, at first with the plank b of about 3～8 rectangles, b ... Deng spoting weld a pipe (one of two pipes together to be welded, a or a ', in the diagram be a) on, rectangular slab is around distributing in the garden week of this pipe, the not welding ends of rectangular slab stretches out from this pipe C limit, then another pipe a ' is inserted into by a plurality of rectangular slab b, b ... the tubular space that forms of non-welding ends, shown in Fig. 1 b.Like this, in two pipe junctions, between the two pipe edges, have suitable gap, and two pipes can reach the purpose of centering, so that reduce the deviation between the groove inner surface.In this case, with rectangular slab b, b ... non-welding ends spot weld on the pipe a ', two pipes are remained on the desired position of when welding.Yet, this as if very simple method that looks, they are a lot of shortcomings: require to have high technical merit and could guarantee to process accurate groove; Can't carry out continuous welding in the whole garden of groove on week owing to there is rectangular slab; Require skilled weld job; Be easy to generate weld defect, causing of this defective is owing to remove after the rectangular slab of spot welding, produces around the welded pipe; Rectangular slab can not be reused again, and this also is a shortcoming, this means the waste of resource.

In the case, proposed many detachable apparatus that are connected pipe that clamp from the outside, replaced the rectangular slab device with this device.Yet this external clip device also has common drawback.Promptly be used for the motion that clamping and the part that is connected pipe have limited welding electrode; Make to be difficult to carry out continuous welding on week, therefore,, not only need skilled weld job, also be easy to generate weld defect simultaneously as the situation in the rectangular slab welding procedure in the garden of whole groove.In addition, it also is unfavorable the deviation that forms between the groove inner surface being proofreaied and correct.So these devices do not obtain to use widely, simultaneously, for the big-inch pipe that is used on the pipeline, can adopt the interior clamping device of the connected pipe of clamping internally yet.But except that expensive problem, the structure of these devices is also very complicated, and is also very huge, and is difficult to reduce its size, and is used on the pipe of intermediate diameters.Even if these devices can reduce its size, still there are many problems to await solving, for example the problem of how to align clamped position at last.

The purpose of this invention is to provide a kind of device that clamps from tube interior, this apparatus structure is reasonable, can be used in easily in the pipe of intermediate diameters.

Device of the present invention is the claw that utilizes many protrusions, connected pipe is supported from tube interior, claw be arranged on hollow body around, about the middle part of hollow body.The feature of this device is to weld continuously around the garden Zhou Jinhang of whole groove; Processing ease is difficult for producing weld defect simultaneously; Also be convenient to adopt automatic welding machine.

With reference to following example, the present invention is carried out detailed description

Fig. 1 a and 1b represent general device.

Fig. 2 a, 2b and 2c are respectively plane of the present invention, the X of key position～X profile among the present invention, Y～Y profile.

Fig. 3 a, 3b and 3c are the profile under the device busy state of the present invention.

Fig. 4 a and 4b are the perspective view of the detent mechanism example among the present invention.

At Fig. 3 a, among 3b and the 3c, the two tubes that on behalf of preparation, symbol (1) with (1 ') to be connected.(2) hollow body that can in pipe (1) and (1 '), move of expression.That works just as will be described is sphere, ellipse garden shape, polyhedron shape and garden cylindricality etc. for the outer shape of hollow body (2), as long as hollow body (2) can be mobile in pipe (1) and (1 ').Along the central axial direction of hollow body (2), laterally settled guide rod (3).Be provided with pressure chamber (5) and (5 ') in the both sides of hollow body (2), each pressure chamber is furnished with sleeve-shaped piston (4) or (4 '), and piston is installed on the guide rod and can moves around this guide rod.In addition, correspond respectively to two fluid delivery ports (6) of pressure chamber (5) and (5 ') and the side that (6 ') are arranged on hollow body (2).Pressure chamber of opposite side (5 ') and fluid delivery port (6 ') are communicated with the fluid line (7) that is placed in the guide rod (3).Big middle part about hollow body, be provided with many telescopic claws (8) and (8 ') around hollow body (2), (8) and (8 ') each corresponding to two ends of adapter to be welded (1) and (1 '), claw (8) and (8 ') are respectively by piston (4) and (4 ') manipulation.Kinematic link is represented in symbol (9) and (9 '), and this connecting rod links together piston (4) and (4 ') and claw (8) and (8 ').But utilize piston (4) and (4 ') to drive the concrete structure of claw (8) and (8 '), not only can be made up of kinematic link (9) and (9 '), also available cam is formed.

By the mechanism of kinematic link 9 and 9 ' form, will do more careful explanation below as instantiation.

In Fig. 2 b, symbol (22 ') represent respectively with (23 ') by claw 8 ' with the bearing pin that is connected of piston 4 ' stretch out, connecting pin (22 ') is linked claw (8 ') on the drive link (9 '), and connecting pin (23 ') is linked piston (4 ') on the drive link (9 ').These connect bearing pin (22 ') and (23 ') and are installed in loosely in the hole (24 ') and (25 ') at drive link (9 ') two ends.In addition, respectively in claw (8 ') side and piston (4 ') side, settled and contacted wall (26 ') and (27 ') of contacting of kinematic link (9), the contact wall is positioned at the two ends of claw (8 ') and piston (4 '), corresponding to the radial motion of claw (8 ') and the axially-movable of piston (4 ').In this structure, claw (8 ') and piston (4 ') rely on kinematic link (9 '), by contact wall (26 ') and (27 '), and transferring power.In this case, can prevent to connect bearing pin (22 ') and (23 ') effectively and produce breakoff phenomenon, its reason is in the driving process, bearing pin is not applied big load.Simultaneously, this mechanism can also increase the pressure of claw (8 ') to pipe (1 ') and (1) inwall.But this device is the example an of the best only, has enough rigidity and intensity if connect bearing pin (22 ') and (23 '), so, and the loose fit in bearing pin and hole and contact wall construction and also just do not needed.Symbol (10) and this spring of (10 ') expression back-moving spring are that claw (8) and (8 ') provide energy to make it to reset.Claw (8) and (8 ') not only can utilize this back-moving spring to reach the action of withdrawal, replace one-way movement piston (4) and (4 ') but also can adopt by a kind of fluid-operated bidirectional-movement piston, make claw (8) and (8 ') withdrawal.In above-mentioned example, hollow body (2) is to be made of two halfbodies that firmly connect with screw (11), certainly, also can be made of other suitable manner.Guide rod (3) connects the projection section of two halfbodies respectively in the middle part, also can adopt the firm body of rod is tightened onto two ways in the halfbody, shown in imaginary line among the figure.

The method of operating and the action of apparatus of the present invention of being made up of above-mentioned part will be carried out specific description with reference to illustrated embodiment below.

At first, to carry flexible pipe (13) and (13 ') of fluid to connect working fluid source of supply (12) in the invention, and make flexible pipe pass through pipe (1), promptly by the pipe (1) that prepare to connect and a pipe in (1 '), be connected on the fluid delivery port (6) and (6 ') that is arranged on hollow body (2) one sides managing 1 joint end flexible pipe.Working fluid can be selected a kind of the use from nitrogen in the gas of classes such as carbonic acid gas and air, also can select a kind of the use from the liquid of water or wet goods class.Working fluid source of supply (12) can comprise fluid reservoir (14), pump (15) and valve (16) and (17).Certainly, also available other suitable modes are formed.The termination of fluid-conveying hose (13) and (13 ') also can be selected arbitrarily with the method that fluid delivery port (6) is connected with (6 ').

At fluid-conveying hose (13) with (13 ') with after hollow body (2) is connected, with respect to the either side of hollow body, hollow body (2) is bearing in giving on the position, chamber in the pipe.In an embodiment, promptly be bearing in the allocation that gives in the pipe (1).Working fluid passes through fluid delivery port (6) to pressure chamber (5) from fluid-conveying hose (13), piston this moment (4) moves right, and presses back-moving spring (10), so make drive link (9) action, and make jaw (8) protruding, and be pressed on the inner surface of pipe (1).As a result, hollow body (2) is fixed, shown in Fig. 3 a.Then, another root pipe (1 ') is delivered to the allocation that gives of hollow body (2) opposite side, working fluid enters pressure chamber (5 ') from fluid-conveying hose (13 ') by fluid delivery port (6 ') and fluid circuit (7).So piston (4 ') is moved to the left, press back-moving spring (10 '), make kinematic link (9 ') action, thereby it is protruding to drive claw (8 '), and is pressed on the inner surface of pipe (1 ').Pipe (1 ') is supported by hollow body (2) as a result, as shown in figure 36.Like this, pipe (1) and (1 ') all is supported in the both sides of hollow body (2), and simultaneously, their end limit is clamped in gives fixed position, in this case, welds along the garden Zhou Douke of whole groove.In above-mentioned operating process, be bearing on the hollow body (2) in order to make pipe (1) and (1 '); And be fixed on to give and also can adopt other suitable clamping devices on the fixed relative position, see the instantiation of Fig. 4 a, 4b, settled some plunger (18) can be assembled hole (19) in it around hollow body; Or settled the groove (21) that plate (20) can be assembled in it, like this, plunger (18) or plate (20) just can be used as the clamping part, with the fixed interval (FI) between the assurance pipe (1) and (1 '), make the directed and easy location of pipe (1) and pipe (1 ')., plunger (18) or plate (20) are removed after (1) and (1 ') be fixed on certain position at pipe, so also carrying out that can the overslaugh welding sequence.

Because two pipes (1) and (1 ') of preparing to connect are held in managing, so guarantee in bevel for welding, to weld, the present invention can eliminate weld defect, And automatic welder(welding machine) easy to use simultaneously easily around the garden Zhou Jinhang continuous welding of whole groove.

Adopt said apparatus to finish after the welding sequence, open valve, the elastic force that relies on back-moving spring (10) and (10 ') to supply with makes piston (4) and (4 ') motion.Fluid in pressure chamber (5) and (5 ') is forced to discharge.Kinematic link (9) and (9 ') return movement are drawn back claw (8) and (8 ').Hollow body and pipe (1) and (1 ') break away from, shown in Fig. 3 c.Hollow body can be pulled out with hawser (not drawing among the figure) or with fluid-conveying hose (13) and (13 '), both can shift out from the termination of pipe (1), also can shift out from other suitable openings.If the profile of hollow body (2) is spherical, so not only in straight tube, and in the bend pipe as in the ell, can both be smoothly, easily hollow body is taken out, therefore except being suitable for as carrying out between the straight tube the clamping device of butt welding, present embodiment is suitable for as intermediate diameters straight tube and bend pipe very much, the inside clamping device when welding between the ell.

As mentioned above, the present invention utilizes many outstanding claws interior with the pipe support that is connected from managing, these claws dispose the middle part that And approximately is positioned at hollow body around hollow body, this characteristic feature of an invention is to center on welding continuously in whole garden week of groove, processing ease is difficult for producing weld defect, automatic welder(welding machine) easy to use. Particularly in the present invention, be placed in hollow body on one side because be configured in two fluid delivery ports that the pressure chamber on hollow body both sides uses, so allowing fluid be transported to by the passage that arranges in the guide rod in the pressure chamber of opposite side is easy to fluid-conveying hose is linked on the fluid delivery port, there are not those carrier pipe to be arranged in the shortcoming that has in the structure of both sides, the sort of structure need to fluid delivery tube respectively from beginning of pipe pull out And and flexible pipe will with are connected the part such as a pump and connect, require flexible pipe very long, be difficult to again control. And in the present invention, the such liquid of water or wet goods is very easily as fluid. When using liquid, the motion of piston can be regulated exactly, can guarantee reliably work, can make things convenient for to clamp reliably easily, in addition, because piston leads with guide rod, can effectively prevent piston jammed characteristics on obliquity so possess.

Claims (2)

1, a kind of device that is used for clamping tube in pipe is characterized in that this device comprises that one is placed on the central axial direction, passes across the guide rod of the hollow body that can move in pipe; Comprise pressure chamber, with the piston of a sleeve-shaped, piston is installed in guide rod Shang And around the guide rod motion in each pressure chamber, and pressure chamber is placed in the both sides of described hollow body; Correspond respectively to the fluid delivery port of each pressure chamber, then be configured in a side of hollow body, be being communicated with of the pressure chamber that is arranged on the hollow body opposite side and one of delivery port that fluid passage in the guide rod carries out by being arranged on, this device also comprises the many scalable claw that is placed in by on the welded tube corresponding end, claw is around hollow body, about the configuration of the middle part of hollow body, claw is by piston actuated greatly.

2,, it is characterized in that hollow body is spherical according to clamping device in the pipe described in the claim 1.

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