DE1750107A1 - Quick-release pipe coupling - Google Patents

Description

Patent attorney * _

I BI-RLIN i / (ZEHLENiX) KF) / NbIJK STKASST β TEl. (0311) 84 BI 0 ·

2 March 9;: - d

DrL / Fi / Sv - D 207

Dracone Developments Limited

Kingsgate House, 66-74- Victoria Street, London SW 1

England

Quick-release pipe coupling

The invention relates to a quick pipe coupling, and in particular a coupling attached to the end of a pipe which is designed to connect to the end of another pipe, which is equipped with a flat splash and can create a tight connection between the two pipes.

A coupling unit constructed according to the invention for connection to a pipe end, a distributor or a similar device is characterized by a tubular part, the one end with a Mohrzahl from himself in the direction of the wheel elongated, provided with an opening and evenly distributed around the circumference of the part is equipped, as well as by claw elements, each guided through the opening of each attachment and each pivoting with one end

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bar 8Ji a collector ring surrounding the tubular part are attached and the other end over the end of the tubular part, which has the lugs, protrudes and each carries an inwardly directed claw, as well as through Means for pushing the collector ring back and forth along the tubular part, the opening in each shoulder being radially from the tubular element with respect to the Pivot point on the collector ring) to which the claw element is attached, arranged in such a way that the other end of the Claw element from the axis of the tubular part is kept outside when the collector ring is near the lugs, and radially inward to the axis and is moved axially towards the end of the tubular part when the collector ring along the tubular part of the lugs is moved away, whereby with such a movement of the collector ring the claws have a tubular flange at the end grab a pipe and press the free annular surface of this flange against the end face of the tubular Teiles.der coupling unit and can connect to it tightly.

The device to move the collector ring can have a * sen having a screw threaded sleeve which engages a screw thread on the collector ring stands, the sleeve being rotatable on the tubular part, but is locked against axial movement with respect to the tubular part.

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The sleeve can be attached to the sleeve by hand, for example by means of a Handwheel, or via a reduction gear by means of a drive motor are rotated.

The collector ring can be in the axial direction of the tubular element can also be moved by means of one or more pneumatic or hydraulic pressure pistons, in which case preferably a locking device prestressed by means of a spring is provided in order to independently rotate the claw elements from the supply of pressurized fluid to the pressure piston or pistons in their retracted gripping positions. Between the or each pressure piston and the collector ring can work with spring preload in the clutch, a dead game delivering device be provided, whereby the first part of the release stroke of the pressure piston unlocks the locking devices.

Furthermore, elastic sealing means are preferably provided on the end face of the tubular part of the coupling unit, which on the ring surface of the one with the coupling unit the flange to be coupled to the drilling provided come to rest and ensure a seal.

According to a further special feature of the invention, an elastic sealing arrangement is created in the end face

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a pipe coupling unit is attached. This arrangement consists of an inner ring made of elastic material which has an inwardly protruding bead which is designed so that it is received in an inwardly directed undercut at the base of a circular recess in the end face, and an inwardly directed circumferential lip, which protrudes over the end face, an outer ring made of elastic material with an outwardly protruding bead which is designed such that it is received in an outwardly directed undercut in the recess, and an outwardly directed circumferential lip which extends over the end face protrudes, as well as a retaining ring made of solid material, which is designed so that it can penetrate into the recess between the two rings made of elastic material, and means for attaching the retaining ^ ings to the end face. · _; s ^rt ".

Preferably, the outer surface of the retaining ring protrudes from the end face, but by a smaller amount than the lips of the rings made of elastic material in order to regulate the degree of compression of the lips by the annular surface of the flange which closes the pipe to be coupled by means of the coupling.

009884/0822

Further details and advantages of the invention are described below with reference to the drawing, which shows:

Figure 1 is an end view of a manually operable clutch, Figure 2 is an axial partial section of this coupling,

en
Figure 3 is an / axial partial section of a jacket of a fluid pressure

Actuator operated clutch, and FIG. 4 shows an axial partial section of a clutch which is actuated by a motor via a reduction gear.

According to FIGS. 1 and 2, the coupling has a tubular part 1 on whose right end, not shown, for attachment to an Eohr, which is a flexible pipe or a rigid one Can act standpipe, or on a manifold device is determined. For this purpose, the right end of the tubular part 1 can end in a flange which is designed in such a way that that it corresponds to a pipe end standard flange.

The left end of the tubular part 1 is provided with a sealing flange 2 and a guide lip 3, the diameter of which is smaller than that of the remaining pipe part 1 and which protrudes beyond the left end face of the flange 2. Tue Jührungslipbe 3 engages in the end fines on the coupling unit brought up tube and centered this tube before β * is gripped by the pawl elements.

000814/0122

A sleeve 4 is on the outer surface of the tubular part 1 watch out. The left end of this sleeve 4 is through the right end face of the Planehes 2 and the right end through a Support ring 5 set «which is attached to the tubular part 1 by any suitable means.

The sleeve 4 is provided on its outer surface with a screw thread 6 which engages with a corresponding one Screw thread 7 is located on the inner surface of a collector ring 8

At three points evenly distributed around the outer circumference of the flange 2 there are three radially extending lugs 9, 10 and 11 provided.

The one in Tig. 2 approach 9 shown in section will be described in detail. The other two approaches are in the same way educated. i

The approach 9 has two radially extending legs 12 j and 13, between which there is a gap 14. The outer ends of the legs 12 and 13 are through a rolling sleeve 1 $ bearing pin 15 connected to each other, which from the gap 14 an opening (which is given the reference numeral 14 in the following! is), which extends in the axial direction of the tubular part 1.

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Through openings like 14 in the three approaches 9, 10 and 11 extend, three claw elements 17, 18 and 19 · In the following only the claw element shown in section in FIG 17 described in detail. The other two claw elements are designed in the same way. Ends at the right end the Iilauenelement 17 in a journal bearing 2t), which is between the Leg of a slot 21 fits in the collector ring and is pivotally fastened in this slot by means of a bolt 22. The left end of the claw element 17 ends in an inwardly directed claw 23.

The inner and outer profile of the central portion of the jaw member 17 are shaped so that the claw element 17 on the inside with the base of the opening 14 and on the outside cooperates with the Eollhülse 16 in such a way that when the collector ring is moved as far to the left as possible, the claw member 17 assumes the position shown by the dash-dotted line 24- (Fig. 2), i.e. the claw 23 becomes As far as possible both in the axial direction from the flange 2 and in the hadial direction outwards from the central axis of the coupling removed. When the collector ring 8 is moved to the right, the pawl 23 becomes inward and at the same time axially to the right moved, due to the interaction of a ramp section 25 of the outer profile of the claw element 17 with the Rolling sleeve 16. In the course of this movement, the claw 23 is on

009884/0822

a certain point behind a splash 26, which is provided at the end of a pipe 27 to be coupled to the coupling unit is to fall inward. After this point, another movement of the collector ring 8 to the right results in that the flange 26 is drawn against the left end face of the flange 2 and tightly connected to this end face will. Preferably, the radially inward movement of the pawl 25 is during this second movement phase of the Ring 8 is not continued, and for this reason the ramp section 25 merges into a section 28, the profile of which runs parallel to the central axis of the coupling when the claw element 17 assumes the position shown in the drawing.

The collector ring 8 is secured against rotation in that the claw element 17 rests against the side walls of the opening 14 and that the bolt 22 and the side walls of the slot 21 are in engagement. The collector ring 8 is in the axial direction moved by turning the sleeve 4, and this is done manually by means of a handwheel 29, which by means of spokes 30 on a center hub 31 is attached, which in turn with the right The end of the sleeve 4 is connected by head screws such as 32. »

When the coupling is to be released, the collector ring 8 is moved to the left, and the sohräge inner profile 33 of the claw element 17 comes into engagement with the base of the off-

009884/0822

opening 14, so that the claw 23 is pressed radially outwards, when it moves to the left in the axial direction. If the claw 23 is moved beyond the outer surface of the flange 26 the tube 27 can be withdrawn.

When two annular flange surfaces are tightly connected, a problem can arise when this tight connection to withstand high pressures, as a normal lip seal with an inwardly directed lip that penetrates at low pressures the pressure of the fluid within the ear is brought into a more pressure-tight engagement, at higher pressures with the inside rotated outwards and through, the gap between the connecting surfaces can be pressed outwards. The in iM. ^. 2 shown The seal is designed to avoid this phenomenon.

According to Fig. 2, an inner sealing ring 3 ^ - made of synthetic rubber provided, part of which in a circular recess 35 is arranged in the end face of the flange 2. The inside corner of this recess is formed undercut and takes one on the sealing ring 34 · provided inwardly protruding bead. Outside the recess, the ring 34 has an inwardly directed one Lip 36 of the self-sealing type, the ring 34 becomes. held in the recess 35 by means of a retaining ring 37 made of solid material, which forms the outer cylindrical surface of the ring 34 spans and rests on the bottom of the recess 35, wherein i

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it is fastened by means of screws 38, the heads of which are countersunk are or are located under the left end face of the retaining ring 37, which protrudes over the end face of the flange 2.

In operation, the handwheel 29 is rotated until the end face of the flange 26 meets the left annular surface of the retaining ring 37 and this positively hinders the exit of the sealing ring 3 ^.

Since sub-atmospheric pressure sometimes occurs in the pipes of a coupled drilling system, precautions must be taken to prevent air from entering the system. It is therefore desirable to have an outer sealing ring 39 available su whose cross section is similar to that of the sealing ring 34- However, the bead and lip are directed outwards and not inwards. This ring 39 can be in the recess 35 outside of the retaining ring 37 are provided, which in the same way prevents the sealing ring 39 from being pulled inwards .wird like it ensures that the sealing ring 34 is not pressed outwards will.

In some applications of the invention, the sealing rings 34 and 39 are cast in the form of a single object, which is provided with a recess in the tube for receiving the retaining ring 3, but in the area of the bottom of the recess

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has a bridge part. The retaining ring 37 can be on this Bridge part, which is fastened with screws such as 38, rest. Alternatively, the position of the retaining ring 37 can also be through Metal inserts are set in the bridge part, i.e. in the Areas where the screws are carried out.

In the embodiment shown in FIG. 3, the functions of the sleeve 4 and the collector ring 8 are combined in a collector sleeve 40 which is slidable on the tubular part 1 is careful. The same objects are in Fig. 3 with the same Reference numerals as in FIGS. 1 and 2 denoted.

The collector sleeve 40 has three equally spaced apart Pivot mountings so that the journal bearings 20 of the pawl members 17, 18 and 19 in the same way as of that Collector ring 8 in Figs. 1 and 2 are included.

At intermediate points around the sleeve 40, outwardly protruding fastenings are provided, which are shown in Fig. 3 by the dashed line Line 41 are shown and are located at the left end of the sleeve.

Beyond the range of motion of the sleeve 40, the tubular Element 1 at the left end lugs like 42, which are aligned with lugs like 41. Make approaches 41 and 42 End fittings for the ends of a hydraulic ram

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dar (one of three pressure pistons arranged around the coupling unit), which consists of a cylinder part 44 which contains a double-acting piston (not shown) which is attached to a piston rod 45 is attached, which in an articulated connection 46 ends, which is connected to an attachment 42 by means of a bolt 47.

The left end of the cylinder part 44 is provided with a dead game supplying arrangement, which consists of a means a bolt 49 connected to the extension 41 articulated connection 48 exists. The articulated connection 48 has a hollow pin part 50 that goes into a hole 51 in the left end of the massive End of the cylinder part 44 is fitted. A spring 52 arranged in the pin part presses against the closed end of the Bore 51 and tries to remove the pin part 50 from the bore 51 to press. However, this is prevented by pins such as 53 which are screwed into the pin part 50 and in slots such as 54 slide which around the pin part 50 and the cylinder part are distributed. * ·

When the pressure piston 43 is actuated to pull the piston rod 45 into the cylinder part 44, the collector sleeve 40 is pulled to the right and acts on the claw elements 17, 18 and 19 in the same way as with the collector ring 8 of FIG. 2 is the case . The pulling force is from the cylinder part

009884/0822

transferred to the hinge connection 48 by means of bolts such as 53 which strike against the left ends of the slots such as 54.

A locking element 55 is also pivotable on the bolt 49 stored. This locking element 55 extends to the left and is radially inward by means of a spring Biased towards the position in which it is in Pig. 3 is shown, this bias voltage via a second leg 56 takes place, which follows from the axis of rotation on the bolt 4-9 extends below. The outer end of the leg 56 is means a bolt 57 attached to one end of a spring 58, the the other end is attached to a shoulder 59 which protrudes from the right end of the collector sleeve 40. At the approach 59 is the Spring 58 fastened by means of a bolt 60.

Normally, ie when the coupling unit is ready to receive the flange 26 of a pipe 27, the locking element 55 rests on the outer edge of the flange 2. However, if the pressure piston 43 is actuated and the collector sleeve 40 is pulled to the right, a point is reached at which the tip of the tab-shaped locking element 55 begins to fall behind the right end face of the flange 2, the surfaces lying on top of one another being shaped in this way that the element falls further inward, the further the sleeve 40 moves to the right. If the flange 26 meets the retaining ring 37, the pressure piston can. 43 if necessary, do not move the sleeve 40 any further, and the locking element

009804/0822

ment 55 locks the sleeve 40 in the position it has reached even if the pressure fluid supply to the pressure piston 43 is switched off.

A link is also attached to the leg 56 by means of the bolt 57 61 attached, the right end of which is slotted and is placed on a bolt 62, which extends from the left end of the cylinder part 44 extends outward,

Venn the pressure piston 43 is actuated in the direction that the Piston rod 48 is pressed from the cylinder part 44, the locking element 55t prevents the articulated connection 48 can move to the left. For this reason, the The spring 52 is compressed and the bolt 62 moves afterwards left, whereby the link 61 to the left against the leg 56 is pressed, which the locking element 55 clockwise pivots about the bolt 49 and thus causes the Locking between the element 55 and the right end face of the flange 2 is canceled. As soon as this happens the collector sleeve 40 can move freely to the left, initially under the influence of the spring 53 and then when the bolts 53 have reached the left ends of the slots 54, under the effect of the further extension of the plunger 43.

4, which shows an arrangement for actuating the clutch by means of a drive motor, only needs to be described briefly.

• *

009884/0822

This embodiment differs essentially from the embodiment shown in Figs. Ϊ and 2 in that that the handwheel 29 is replaced by a drive motor.

The ring 29 is omitted and the center hub 3 " ¹ is replaced by a worm wheel 65. A worm 66 which meshes with this worm wheel is attached to the shaft of a reversible hotors 67. This shaft is tangential with respect to the coupling unit and the motor is mounted on a suitable bracket which is attached to a rigid part firmly connected to the tubular element 1.

The motor can be hydraulic or pneumatic or act electric motor.

- patent claims -

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Claims (10)

Claims 1. Quick-release pipe coupling for attachment to a pipe end, distributor or a similar arrangement, characterized by a tubular part (1) which is provided at one end with a plurality of radially extending, with an opening (eg 14) and around the circumference of the part is equipped with uniformly distributed approaches (9,10,11), as well as by a plurality of. Claw elements (17, 18, 19) »which are each guided through one of the openings (e.g. 14), a collector ring (8) surrounding the tubular part (1), each of the claw elements (e.g. 17) at one of its ends (e.g. 20 ) is pivotally attached to the collector ring (8) (e.g. by 21) and the other end of each claw element protrudes over the end (2) of the tubular part (1) carrying the lugs (9,10,11) and an inwardly directed part Claw (e.g. 23), as well as by means (Fig. 2; 2,4,7,31,30,29: Fig. 3? 43: Fig. 4; 4,6,65,66,67) for and pushing back the collector ring (8) along the tubular part (1), wherein the opening (e.g. 14) in each of the lugs (e.g. 9) radially from the tubular part (1) with respect to the pivot point (e.g. 22) on the collector ring on which the claw element (κ.B. 17) » that through the opening 009884/0822 (e.g. 14-) is guided, is hinged, and with respect to the Slopes of the inner and outer profile of the claw element eg- (eg 17), which each come into engagement with the inner <J2) and the outer (eg 16) edge of the opening (eg 14), is arranged in such a way that the end of each claw element carrying the claw (eg 2 ^) (e.g. 17) from the axis of the tubular part (1) to the outside when the collector ring (8) is in the vicinity of the lugs (9,10,11), and radially inward to the axis and axially in the direction of the End (2) of the tubular part (1) is moved when the collector ring (8) along the tubular part (1) is moved away from the projections (9,10,11), whereby with such a movement of the " V. ctorringes (8) the claws (e.g. 23) grip an annular flange (26) at the end of a pipe (27) and press the free annular surface of this flange (26) against the end face (of 2) of the tubular part (i) of the coupling unit and with you can connect tightly. 2. Coupling according to claim 1, characterized in that that the device for moving the collector ring (8) has a sleeve (-Ί-) with an external thread (6), a
which engages in / internal thread (7) on the collector ring (8), that the sleeve (4) is rotatable on the tubular part (1) and that devices (2,5) are provided to prevent axial movement of the sleeve (4). ) along the tubular part (1). 3. Coupling according to claim 2, characterized in that a handwheel (29) is attached to the sleeve ^ 4), that allows the sleeve to rotate. 4. Coupling according to claim 2, characterized in that that a motor (67) and this motor with the sleeve (4) coupling gear (65, 66) is provided to to rotate the sleeve (4) to move the collector ring (8). 5. Coupling according to claim 1, characterized by a plurality of hydraulic pressure pistons (e.g. 43), a fastening lug (e.g. 42) firmly connected to the tubular part (1) for one end of each of the Plungers (e.g. 43), as well as fasteners (e.g. 48) for securing the other end of each of the plungers (e.g. 43) on the collector ring (8) in order to move it in the axial direction of the tubular when the pressure piston (e.g. 43) is actuated Partly (1) to move. 6. Coupling according to claim 5 »characterized by a locking element (55)» a pivot pin (e.g. 49) on the collector ring (8) for the locking element (55) »elastic means (58), which the locking element bring it into a position in which it comes into engagement with a stop (2) on the tubular part, • ä ■ i. · ^ 009 * 14/0122 to prevent the collector ring (8) from moving in the direction of of the approaches (9 ^ 10,11) "moves a coupling (61) from one Pressure baskets (e.g. 43) to the locking element (55)? one Device delivering a dead game (e.g. 48, 51, 52, 53) for the pressure piston (e.g. 43), which is part of the pressure basket (e.g. 43), which is attached to the fastening attachment (e.g. 42) is attached, allows you to move in the direction of the lugs (9, 10, 11) on a distance that is sufficient to Loosen the locking element (55) before the collector ring (8) is moved in this direction. 7. Coupling according to claim 1, g ekennzeich.net by elastic sealing means (3 ^) ₅ which are held in a circular recess (35) in the end face (of flange 2) of the tubular part (1), and a sealing lip (36) ) which is directed inwards in the direction of the axis of the tubular part (1). 8. Coupling according to claim 7> characterized in that a second sealing ring (39) ₅ which is held in a circular recess (35) in the end face (of flange 2) of the tubular part (1), and a sealing lip are provided which is directed outwards from the axis of the tubular part (1). 009884/0822 9. Coupling according to claim 1, characterized in that an elastic sealing arrangement (34-, 39 »37) is provided which in an end face of an element to be coupled with the coupling unit or two elements to be coupled with the coupling unit (eg 2 or 26) is attached that this arrangement is provided with an inner ring (3 ^) made of elastic material with an inwardly protruding bead, which is designed so that it is in an inwardly directed undercut at the base of the circular recess (35) in the end face ( for example from 2 or 26) that an inwardly directed circumferential lip (36), which protrudes over the end face, and an outer ring (39) of elastic material are provided, which has an outwardly protruding bead, which is formed in this way that it is received in an outwardly directed undercut in the recess (35), and "that furthermore an outwardly directed circumferential lip which extends over the end face he protrudes (e.g. from 2 or 26), a retaining ring (20 made of solid material which is designed in such a way that it can be inserted into the recess (35) between the two rings (34, 39) made of elastic material, and devices ( 38) are provided for fastening the retaining ring (37) in the recess (35) . 009884/0822 10. Coupling according to claim 1, characterized in that that each of the claw elements (e.g. 17) has a section (25) whose outer profile differs from that on the collector ring (8) attached pivot end (20) to an intermediate point in the longitudinal direction of the jaw member (e.g. 17) from the Axis of the tubular part (1) is inclined outwards, as well as a further section (28) extending from the intermediate point extends to the end of the claw (23) and runs essentially parallel to the axis of the tubular part (1), when the intermediate point is in contact with the outer edge (e.g. 16) of the opening (e.g. 14) through which the Claw element (e.g. 17) is guided, whereby in a further Bt., E ^ ung des Collector ring (8) do not tighten the claws (e.g. 2J) any further be moved inside in sighting of the axis of the tubular part (1). V ^ X 009884/0821