EP1856435A1

EP1856435A1 - Open locking ring comprising a screw lock

Info

Publication number: EP1856435A1
Application number: EP06707452A
Authority: EP
Inventors: Manfred Meinig
Original assignee: Metu Meinig AG
Current assignee: Metu Meinig AG
Priority date: 2005-03-08
Filing date: 2006-03-07
Publication date: 2007-11-21
Also published as: US20080164691A1; DE102005017368A1; WO2006094761A1

Abstract

The invention relates to an open locking ring (14) comprising a screw lock which is used to connect pipes comprising end flanges or to fix covers to containers or the like. Said screw lock comprises a clamping screw which extends in the peripheral direction and is embodied as a double spindle (1), the ends of said clamping screw being provided with counterrotating threads (2, 3). Said threads (2, 3) engage in threaded plates (6, 10) with a right-handed inner thread (7) or a left-handed inner thread (11), the threaded plates (6, 10) being pivotably mounted in bearing blocks (15) connected to the ends of the clamping ring (14). The ends (13) of the clamping ring (14) are pulled together or pushed away from each other by actuating the double spindle (1). To this end, the double spindle (1) is provided with a central part (4) embodied as a hexagon such that a simple fork spanner (23) can be used to open or close the screw lock. The ends of the double spindle (1) are provided with inner hexagons (5) so that alternatively an Allen key (22) can be used to actuate the double spindle.

Description

Open clamping ring with screw lock

The invention relates to an open clamping ring referred to in the preamble of claim 1. Art.

For the connection of end flanges having pipes or for attaching lids to containers or drums and to determine other round equipment components clamping rings are often used, whereby a variety of Versehraubungen is avoided.

Such clamping rings have according to the flanges of the tubes, containers or equipment components different cross-sectional profile shapes and ensure the contraction and sealing of the components together.

For handling the open clamping rings are provided with one or more turnbuckles, which connect the free ends of the clamping rings together and pull them together when closing or press apart when opening.

A particularly simple lock design consists of a running in the circumferential direction of the clamping ring screw which passes as a flap at right angles bent ends of the clamping ring, and a seated on the screw or on one of the lobes nut. This screw and nut turnbuckle can be operated with a screwdriver or a wrench.

For the fulfillment of higher claims are in such

Turnbuckle Bolts or rollers are provided which are rotatably mounted in these corresponding retaining lugs provided at the ends of the clamping ring and which are passed through by the tensioning screw. be set. Such screw locks are known from DE 197 28 655 Al.

For clamping rings with long clamping paths are Spannschlös- ser with curved screws, as described for example in DE 35 37 504 Cl. The curved screws run parallel to the clamping ring outer circumference. However, such locks are relatively complicated to handle, so that special tools are necessary for the screwing. Also, the closing process is still too tedious and in particular for use on the site little practice.

For this reason, lever locks are provided in particular in frequently operated clamping rings, in which the clamping screw is replaced by a toggle lever or the like lever. However, since the lever always allows only the same closing path, such a clamping ring is unsuitable when using device components with varying circumference. To adapt the clamping path, this must be adjustable, for example, with an additional clamping screw. Such a structure is expensive because of the significantly higher production costs. In addition, such a cam lock must be secured with additional measures against self-opening.

Another disadvantage is that an adjustable cam lock after repeated closing and opening in a time-consuming manner must be readjusted to maintain the correct voltage.

For the connection of thin-walled sheet metal tubes with molded or attached flanges existing metal tubes screw locks are preferred for the reasons mentioned. The described problems fall in these particularly significant, since such clamping rings diameter can reach up to 3 m and their installation on the ceiling of high industrial halls for standing on ladder frames or stages mechanic is often difficult because of limited accessibility.

The invention is therefore an object of the invention for a particularly suitable for such applications clamping ring - ie a clamping ring of larger diameter with long clamping paths with limited accessibility - to create that can be quickly and safely closed or opened.

This object is achieved according to the present invention with a nera open clamping ring with screw lock, with simple tools, eg. As screwdrivers or wrenches, is adjustable and has the features specified in claim 1.

After the essential feature of the invention, a double spindle is provided as a clamping screw, the ends of which are provided with opposing threads, ie a right-hand thread and a left-hand thread, which threaded plates and threaded rollers are assigned with corresponding internal threads in the attached to the clamping ring end bearing blocks to a parallel To the clamping ring axis extending axis are pivotally mounted. To operate this double spindle, the threaded ends are each equipped with internal multiple edge, preferably hexagonal edge, in which Allen key or similar tools can be used. According to a further feature according to claim 2, the middle part of the double spindle located between the ends is furthermore designed as a multiple edge, preferably a hexagon. This design offers the following possibilities and advantages.

With a double spindle equipped with left- and right-hand threads, the closing or opening speed is doubled. To operate this double spindle are easily trained and handled tools, namely open-end wrench for the middle part and Allen key for the provided at the ends of the inner multiple edges or open-end wrench for the middle part. Thus, the clamping ring can be easily and quickly assemble or disassemble even with limited accessibility.

The very stable and largely unbreakable trained screw lock is inexpensive to produce.

Further features of the clamping ring according to the invention are specified by the claims 3 to 11.

When mounting the clamping ring, which is usually delivered in the open state, pay attention to the correct screwing direction of the double spindle. Thus, to close the screw lock, the double spindle must be turned on the left-hand end on the left and on the right-hand end on the right. Otherwise, the lock falls, so yes at the delivery in the open

End position is located, apart. When using electric or pneumatic screwdrivers this can happen very easily.

Since the left-hand thread can hardly be visually distinguished from the right-hand thread, it is proposed according to claim 3 to color the threaded plates or the thread rolls differently. So you can, for example, the left-handed threaded plate or Thread roll in the surface treatment colored, preferably red, mark.

A still safe solution is proposed according to claim 4, according to which at least at one end of the double spindle, a stop, preferably a threaded ring, is provided, which is firmly connected to the double spindle, preferably glued.

Due to the design of the bearing blocks and mounted in these threaded plates according to claim 5 friction forces are reduced, resulting in easier handling.

The proposals according to claims 6 to 9 facilitate the assembly of the threaded plates or favor the power transmission or position assurance of these threaded plates.

According to claim 10, a screw lock designed according to the invention is provided in which threaded rollers are provided instead of the threaded plates.

According to the proposal according to claim 11, the bearing blocks can be dimensioned such that even in the fully closed state, the circumferentially protruding Schraubenen- are largely covered.

The object of the invention is explained below with reference to two embodiments, which are illustrated in the drawings, in detail.

In the drawings show:

1 perspective view of the double spindle, 2 perspective view of a threaded plate,

3 perspective view of a bearing block,

4 shows a perspective and partially broken view of a screw lock connected to the clamping ring with the clamping ring open,

5 with the clamping ring closed with indicated actuating tools,

6 is a side view of a modified bearing block,

7 is a section along the line VII - VII in Fig. 6,

8 is a side view of a bearing block according to a second modification,

9 is a perspective view of a thread roll,

10 is a perspective view of a bearing block according to a second embodiment of the threaded roller of FIG. 9,

Fig. 11 perspective view of a double spindle with trained in the form of a cylinder middle part and

Fig. 12 perspective view of a half of a clamping ring connected to the screw lock according to a further embodiment. Identical parts are denoted by the same numerals, modified parts by numbers with dash indices.

With the figures 1 to 3, the components essential for the screw lock according to the invention are illustrated.

The double spindle 1, which is important for the invention, as shown in FIG. 1, has a right-hand thread 2 on the right-hand side in FIG. 1 and a left-hand thread 3 on the opposite side. To actuate this spindle, the middle part 4 is formed as a solid, short hexagonal profile, which, as indicated by Fig. 5, is easily operable with a wrench 23 formed as a wrench.

In addition, in the two spindle ends Innensechskante 5 are incorporated, in which, as also indicated with Fig. 5, Allen key 22 can be used.

The threaded sections 2 and 3 of the double spindle 1 are associated threaded plates with matching right-handed or left-handed internal thread. One of these two threaded plates 6 with internal thread 7, here a right-handed internal thread, is shown in Fig. 2. These threaded plates 6 and 10 are equipped on both sides with round cross-section axes of rotation 9, which are closed at the end with cuboid end plates 9a, 9 grooves 8 are formed between the threaded plate 6 and the end plates. Thus, the threaded plates 6 and 10 are pivotable about an axis parallel to the clamping ring axis.

The threaded portion 10 associated with the threaded portion 3 of the spindle 1, as shown in Figures 4 and 5, is identical, but provided with a left-handed internal thread 11.

These threaded plates 6 and 10 are used in bearing blocks 12, of which, by way of example in FIG. 3, the bearing bracket on the right in FIGS. 4 and 5 is shown.

The bearing block 12 formed from the side walls 15 and connecting them central web 18 has a substantially U-shaped cross-section. The side walls have slot-like design

Breakthroughs 16 which are dimensioned such that the rotated by 90 ° threaded plates 6 and 10 can be inserted into this.

After rotation of the threaded plates 6 and 10 in the position shown in Figures 4 and 5, the laterally projecting axes of rotation 9 are guided in the openings 16, wherein the end plate 9a abut the outside of the side walls 15, so that the threaded plates 6 and 10 in Position secured transversely.

The areas facing the clamping ring 13, namely the tension sides of the apertures 16 are formed semicircular, so that the axes of rotation 9 of the threaded plates 6 and 10 can create these form-fit and non-positive and rotatable.

The side walls 15 are to be dimensioned so that they are not deformed even at the highest possible load by the tensile force of the double spindle 1. The to be connected to the clamping ring 14 center web 18 and the side walls 15 are curved so that they are adapted to the clamping ring outer diameter.

In Fig. 4, the clamping ring 14 is shown with the inventively designed screw lock in the open state.

The two ends 13 of the clamping ring 14 are equipped with bearing blocks 12 according to Figure 3, which are connected to the top of the clamping rings 14 by latching, welding, riveting or the like. In the bearing blocks 12, the threaded plates 6 and 10 are used in the manner described with reference to FIG. 3, whereupon the ends of the double spindle 1 having right and left-hand threads 2, 3 are screwed into their internal threads 7 and 11 so that only a few Threads in the limited by the side walls 15 interior of the bearing blocks 12 protrude.

With Fig. 5, the same arrangement as shown in Fig. 4, but in the closed state of the screw lock. The

Ends 13 of the clamping ring 14 are frontally adjacent to each other. The threaded portions 2 and 3 of the double spindle 1 are completely screwed into the threaded plates 6 and 10, however, are still largely protected in the limited by the side walls 15 Interior of the bearing blocks 12. Their protruding ends are marked with the double arrow 24, which simultaneously the maximum Clamping path illustrated. If longer clamping distances are required, longer double spindles 1 should be used accordingly.

The operation of the screw lock are simple hand tools, namely alternatively a fork wrench 23, which is to be attached to the formed as a hexagon center part 4, or Allen key 22, which are alternatively used in the hexagonal edge 5 on the right in Fig. 5 and left side of the double spindle 1.

Thus, the screw lock can be operated even in the most unfavorable mounting situations, namely from three sides. A very fast operation is possible by means of the Allen key 22, which are advantageously clamped in the form of so-called bits in an electric or pneumatic screwdriver.

The aufzusetzende from the front fork wrench 23 may also find particular application when, for example, rusty locks extremely high torques are required.

Another advantage of the screw lock according to the invention is that it allows double closing and opening speed because of the provided with right and left-hand thread 2 and 3 double spindle 1. This is especially important for long closing distances, especially when the closing drive is done manually.

Since the entire closing path is divided into two halves, the screw ends 19 do not protrude as far as in the closed state, as is the case with screw locks with single-spindle screws. In general, the ends 19 are located between the side walls 15 of the bearing blocks 12 protected, which leads to the reduction of the security risk.

The explained in particular with reference to FIG. 3 design of the bearing blocks 12 allows a very stable, highly resilient

Construction. Since the side walls 15 have only relatively small openings 16 for receiving the threaded plates 6 and 10, they are substantially more stable than those of conventional screwdrivers. Locks, as they are z. As shown in DE 197 28 655, used eyelets or hooks. This smaller dimensions of the bearing blocks 12 are possible, resulting in a significant material savings.

When mounting the clamping ring 14, which is dimensioned so that in the de-energized state its outer diameter is slightly larger than the outer diameter of the end flanges to be joined, this is to be expanded by means of the screw lock against the effect of residual stress so that it over the Flanges can be pushed to be tightened then by means of the screw lock.

In order to make this possible, the migration back of the threaded plates 6 against the pulling direction must be prevented.

For this purpose, as shown in Figures 6 and 7, below the openings 16 lugs 20 are cut out and pressed, which support the threaded plates 6, so that they can not go to the rear, so in Figures 6 and 7 to the right.

Another possibility is illustrated by the modification according to FIG. In this case, the apertures provided in the side walls 15 are inclined with respect to the upper side of the central web 18 in such a way that their distance from the central web 18 is reduced counter to the clamping direction. This has the consequence that the threaded plate 6 rests with its underside in a shifted to the right in Figure 8 position on the central web 18 and is thus prevented from further migrating back. With the figures 9 and 10, another variant of the bearing blocks 12 'is illustrated. Instead of approximately cuboid threaded plates 6 and 10, a threaded roller 21 is provided with a right- or left-handed internal thread 7 '.

For receiving and supporting this thread roller 21, the side walls 15 'of the bearing block 12' with the cross section of the thread roller 21 corresponding circular openings 16 'are provided. The threaded rollers 21 also have axes of rotation 9 'at both ends, which are bounded at the end by end plates 9a', so that they form an annular groove 8 '.

After insertion of the threaded roller 21 in the circular openings 16 'of the side walls 15' engage the Spannringenden adjacent edge regions of the apertures 16 'under tensile load in the grooves 8' of the threaded rollers 21 a.

Instead of threaded rollers with annular grooves 8 'and cylindrical thread rollers without ring grooves, so smooth rollers can be used, since with closed screw lock the thread rollers 21' are held frictionally in the circular openings 16 '.

The most universal screw lock according to the present invention, as shown particularly in FIG. 5, has a double spindle with a center part designed in the manner of a hexagon.

Insofar as an actuation of the screw lock with a fork wrench is not absolutely necessary, a double spindle 1 'shown in FIG. 11 is also suitable, which has a cylindrical central part 25. Finally, FIG. 12 illustrates a measure for securing the double spindle 1 '. This has at its left end a stop ring 26 which is screwed onto the outermost end and fixedly connected to this, preferably glued. This ring, which rests on the outside of the threaded plate 10 in the end position of the opened screw lock, prevents the double spindle 1 'from being completely unscrewed from the threaded plates and thus the screw lock decoupling into its individual parts.

LIST OF REFERENCE NUMBERS

1, 1 'double spindle

2 right-hand thread (outside)

3 left-hand threads (outside)

4 middle part (hexagon)

5 hexagon socket

6 threaded plate

Ir 7 'right-handed internal thread

8, 8 'grooves

9, 9 'axis of rotation

10 threaded plate

11 left-hand internal thread

12, 12 'bearing blocks

13 end

14 clamping ring

15, 15 'sidewalls

16, 16 'breakthrough

17 tension side of the breakthrough

18 middle bridge

19 screw ends

20 noses

21 thread roll

22 Allen key

23 fork wrench

24 tensioning path

25 cylindrical middle part

26 threaded ring

Claims

claims

1. Open clamping ring for connecting tubes having end flanges or for attaching lids to containers or the like. whose ends are connected to each other by means of a screw lock, wherein the screw lock has a circumferentially extending clamping screw which passes through the radially projecting bearing blocks provided on the clamping ring, wherein at least one of the bearing blocks is provided with a thread receiving the clamping screw and the Clamping screw is adjustable by means of a wrench and wherein the clamping ring to change its diameter is elastically deformable, characterized in that the clamping screw is designed as a double spindle (1) whose ends with opposite threads (2,3) and inner multiple edge, preferably hexagon socket (5), are provided and that in both bearing blocks (15, 15 ')

Threaded plates (6, 10) or threaded rollers (21) with opposite internal threads (7, 11; 1 ') are used, which are each pivotable about an axis parallel to the clamping ring axis extending.

2. Clamping ring according to claim 1, characterized in that the double spindle (1) has a central part (4) designed as a multiple edge, preferably a hexagon.

3. clamping ring according to claim 1 or 2, characterized in that the threaded plates (6, 10) and threaded rollers (21) are colored differently.

4. Clamping ring according to claim 1, 2 or 3, d a d e r c h e c e n e c e s in that at least one end of the double spindle 1 'is secured with a stop, preferably a glued threaded ring (26).

5. Clamping ring according to claim 1 to 4, characterized in that the bearing blocks (12, 12 ') radially projecting side walls (15, 15') which are connected to each other and with the clamping ring (14) via a central web (18) and respectively Have openings (16,16 '), in which the threaded plates (6) or threaded rollers (21) with laterally projecting axes of rotation (9, 9') are pivotally mounted.

6. Clamping ring according to claim 5, characterized in that the openings (16) of the side walls (15) are elongated, that the diameter of the axes of rotation (9) of the height of the openings (16) and the length of

Rotary axes (9) corresponds to the thickness of the side walls (15) and at the ends of the axes of rotation (9) end plates (9a) are provided whose length is greater than the diameter of the axes of rotation (9), but smaller than the length of the apertures (16) is.

7. Clamping ring according to claim 6, characterized in that the end (130 of the clamping ring (14) facing side of the openings (16) is semicircular with a radius of rotation of the axes (9) corresponding radius is formed.

8. Clamping ring according to claim 6 or 7, d a d u r c h e c e n e c e s in that the side walls (15) close to the openings (16) have lugs (20) on which the mounted threaded plates (6,10) are supported in the circumferential direction.

9. Clamping ring according to claim 6 or 7, characterized in that the openings (16) with respect to the central web (18) extend inclined so that the end plates (9 a) against the clamping direction against the clamping means at the top of the central webs (18) and blocked by this.

10. Clamping ring according to claim 1, characterized in that the openings (16 ') are circular, in which threaded rollers (21) are rotatably mounted with internal threads (7').

11. Clamping ring according to one of claims 1-10, characterized in that the length of the side walls (15) is dimensioned so that the limited of them interior of the bearing block (12) the ends of the double spindle (1) even in the contracted state of the clamping ring ( 14) largely absorbs.