DE3221158C2 - Adjustable lock, especially for fittings - Google Patents

Abstract

This adjustable lock is particularly suitable for fittings and drive parts with a rotatable drive, such as a shut-off valve or a gate valve. It essentially contains a locking housing (2) attached to the drive attachment, a locking sleeve (6) connected in a rotationally fixed manner to the drive and an adjustable locking bolt (23) which, with the help of a lock cylinder (25) which can be operated by a removable key, between can be moved to two end positions. The adjustable locking bolt (23) can engage directly in radial recesses (9) on the circumference of the locking sleeve (6). By eliminating additional transmission elements, the shear stress on the locking bolt (23) is reduced and the accuracy of the locking setting is increased, since the influence of adding different manufacturing cycles is eliminated. To determine the desired locking position, an external thread (10) is provided on the circumference of the locking sleeve (6), into which an axial toothing (20) of a vertically extending adjusting nut (19) engages. This adjusting nut (19) or an axially movable part with it contains a groove (21) into which a projection (22) attached to the locking bolt (23) can only engage when the inner end of the locking bolt (23) is in one of the radial recesses (9) of the locking sleeve can be inserted. The adjusting nut (19) runs on a threaded spindle (11), which only with the help.

Description

- The locking sleeve (6) on the one hand contains a number of radial recesses on its circumference (9) and on the other hand an external thread (10), in which an axial toothing (20) a engages orthogonally arranged adjusting nut (19),

- The adjusting nut (19) is mounted on a threaded spindle (11), and on its circumference or on a part axially movable with it is a recess (21), for. B. a groove attached,

- The threaded spindle (11) is rotatably mounted in a bore {2a) of the Vfrriegei ngsgehäuses (2); it is at least one spring bolt element (17) against Ve. turn secured, which engages in at least one recess (16) on the head piece (14) of the threaded spindle (11) and it can only be rotated after releasing this fuse with the help of a special key

- The locking bolt (23) has a projection (22). which can only engage in the recess (21) of the adjusting nut (19) when the Locking bolt (23) can be pushed into one of the radial recesses (9) of the locking sleeve (6) is.

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2. Lock according to claim 1, characterized in that that the axial toothing of the adjusting nut (19) approximately in the middle through the circumferential groove formed recess (21) is interrupted.

3. Lock according to claim 1, characterized in that the adjusting nut (19a) is surrounded by a locking sleeve (6) open with the adjusting nut (19a,) axially movable but not rotatable sleeve (37) in which a groove is included is, in which the projection (22) of the locking bolt (23) can engage.

4. Lock according to one of claims 1 to 3, characterized in that the radial recesses in the locking sleeve (6) are designed as blind bores (9) and that the in this engaging projection of the locking bolt (23) forms a cylindrical pin (24).

5. Lock according to one of claims 1 to 3, characterized in that the radial recesses are formed in the locking sleeve (6) as right-angled grooves and that the in this engaging projection of the locking bolt (23) has a right-angled profile.

6. Lock according to one of claims 1 to 3, characterized in that the radial recesses represent in the locking sleeve (6) recesses of a toothing and that the in this engaging projection of the locking bolt (23) has a wedge-shaped head piece.

7. Lock according to one of claims 1 to b, characterized in that the external thread of the The threaded spindle (11) is multi-thread.

8. Lock according to one of claims 1 to 7, characterized in that at least three Federboizenelemente (17) are provided in at least three recesses (16) on the head piece (14) the threaded spindle (11) engage.

9. Lock according to one of claims 1 to 7, characterized in that the number of recesses in the head piece of the threaded spindle! is different from the number of spring bolts.

10. Lock according to one of claims 1 to

9, characterized in that several, preferably two, lock cylinders (25), in a corresponding Engage number of grooves of the locking bolt (23).

11. Lock according to one of claims 1 to

10, characterized in that in the groove (21) of the steep nut (19) or the sleeve (37) on the outside of the lock housing visible element, e.g. B. a pointer (32) to indicate the position intervenes.

12. Lock according to one of claims 1 to

11, characterized in that the adjusting nut (19a,) is axially extended and by the locking housing (2) is led to the outside and is connected here to a position indicator

13. Lock according to claim 12, characterized in that that the emerging from the Verriegeiungsgchäuse end of the locking bolt on an actuating element, z. B. acts an electrical contact (36) of an electrical position indicator.

14. Lock according to one of claims 1 to 13, characterized in that the groove in the locking sleeve is wider than the corresponding PaU spring (7).

15. Lock according to one of claims 1 to 13, characterized in that the locking sleeve and threaded sleeve are combined into one component are.

The invention relates to an adjustable lock, especially for fittings and drive parts with a rotatable drive, such as a Shut-off valve or a gate valve, with a locking housing attached to the actuator attachment, a locking sleeve connected to the drive in a rotationally fixed manner, which is either rotatable with a rotating spindle, but not axially movable, or with a threaded sleeve of a non-rotating spindle is positively connected, and an adjustable Locking bolt, which can be operated with the help of a lock cylinder, which is operated by a removable key can, is movable between two end positions.

A lock for fittings of the type described above is from the document KB 4 40 180 DE, pages 10 and 11, from Rheinische Armaturen-

and Maschinenfabrik Albert Sempell. At this Locking, the end positions of the axial movement of the threaded ring correspond to the opening and closing positions the fitting. A lock cylinder is attached to the lock housing in such a way that the extended Locking bolt protrudes into the movement space of the threaded ring and this is subject to an axial movement prevents. This means that the valve is blocked either in the open or closed position second lock cylinder which locks the threaded ring in its opposite end position the valve can be locked in the open and closed position. Subsequent changes to the blocking positions are not possible here.

Furthermore, from DE-GM 78 19 582 a locking system for slides with a rising spindle is known. Here you have a coaxial stroke because of the significantly larger stroke compared to a shut-off valve cylindrical sleeve firmly connected to the handwheel and the spindle protruding through the handwheel accordingly extended. On the sleeve lock bodies are attached in a desired number, the Riege5 in the Engage the locking position through the sleeve in a groove or recess provided for this purpose in the spindle extension.

Such a locking system is also known for short-stroke shut-off valves with a rising valve spindle. Here is a cylindrical lock body, consisting of a lock cylinder and a radial from the bolt emerging from the lock body, connected to the face of the spindle protruding through the handwheel and the handwheel is designed in such a way that the lock body is entirely or partially covered by a cylindrical recess is surrounded on the side of the handwheel facing away from the valve. The bolt of the lock cylinder engages in the locking position in a groove within this recess or is in a lock in the oh ° ren end position of the shut-off valve above the upper edge of the handwheel.

For such locking tasks Zyhnderschlösser are usually used, in which the .Key only in a desired locking position: the lock can be removed. It is unsatisfactory in the case of the known armatures' locking devices u. «.. that the locking positions are specified and not changed afterwards without major modifications can be. /. B. to the effect that a valve that was previously lockable in the open position is now in the closed position or vice versa can be locked. As a result the construction of the well-known fittings there are also other disadvantages of this type. Above all, you can use the firmly specified Vemegelungsstellwigen due to the addition of various Manufacturing tolerances for larger series are considerable Deviations of the actual position from the target position occur

The invention is based on the object of an adjustable Lock, especially for fittings, to be designed so that the locking bolt is directly into the locking component, e.g. B. a locking sleeve rotatably connected to a threaded sleeve, engage can, d. H. there should be a direct force intervention without intervening parts. This is supposed to the mechanical stress, especially the shear stress of the. Locking bar compared to the earlier versions are reduced, in which the shear forces due to the translations the interposed τ elements are relatively large. Furthermore, this will strain the Locking bolt prevented in the event of an attempted incorrect operation. Direct force intervention is also more precise The locking can be set as the addition of different manufacturing cycles is avoided. which cannot be prevented in the case of interlocks with successive transmission elements. Even the lock should be designed so that with relatively simple means on the valve or on a remote

ίο position can be shown whether the valve is locked or is unlocked

This object is achieved with an adjustable lock of the type described above an embodiment which is characterized by the following features of the invention:

- On the one hand, the locking sleeve contains a number of radial recesses on its circumference and on the other hand an external thread '.' .Each in which an axial toothing of an oi'ihügor-ai is arranged Lock nut attacks,

- The adjusting nut is mounted on a threaded spindle, and on its circumference or on a ^{part movable with it axb 1} is a recess, for. B. a groove attached.

- The threaded spindle is rotatably mounted in a bore of the locking housing; she is through at least one spring bolt element secured against twisting, which in at least one recess

- ■ o mung engages on the head piece of the threaded spindle and it can only be rotated after releasing this safety device with the aid of a special key

- The locking bolt has a projection which only then engages in the recess of the adjusting nut can, if the locking bolt can be pushed into one of the radial recesses of the locking sleeve is.

In a first embodiment, the recess in the otellnut can be formed by a circumferential groove approximately in the middle of its axial length. In the event that a groove in the area of action of the external thread of the locking sleeve is to be avoided, a solution is provided in which the adjusting nut is surrounded by a sleeve open to the locking sleeve, axially movable with the adjusting nut, but non-rotatable, this sleeve having a groove contains, in which the projection of the locking bolt can engage.
The radial recesses in the locking sleeve are expediently designed as blind bores, while the locking bar engaging in these recesses represents a cylindrical pin which can be positively inserted into the blind bores.

The radial recesses and the engaging projection of the locking bolt can also have a different cross-sectional shape. ~> B. have a rectangular shape. The radial recesses can also be formed by indentations of a toothing into which a correspondingly adapted wedge-shaped head piece of the locking bolt can engage.

For the locking of the threaded spindle it can be in the interest of increasing the security against unauthorized persons Adjusting the threaded spindle may be useful to provide several spring bolt elements that are in recesses rush to reach the head piece of the threaded spindle. The number of these recesses can be the same or be greater than the number of spring bolt belts.

It can also be useful to use two or more lock cylinders to operate the locking bolt.

To identify the position of the adjusting nut can, in a further embodiment of the invention, an element visible on the outside of the locking housing, z. B. a pointer, be arranged with an inwardly protruding approach in the groove of the adjusting nut or the sleeve engages. The adjusting nut can also be extended axially and through the locking housing be outwardly and be connected here to a position indicator or to an actuating element an electrical position indicator, e.g. B. a switch contact, act. This makes it possible to display the position of the adjusting nut even at a remote point. As long as the setting of the adjusting nut is not changed on the threaded spindle, this display is also a display of the valve position. Furthermore, a position indicator on the locking bolt can show whether the valve is locked or unlocked is. Such a display is often desired in safety circuits.

Insofar as there are particularly high requirements with regard to fine-tuning, it can not be one-piece Design of the locking bushing and threaded bushing wider than the groove in the locking bushing the associated feather key can be formed so that small relative movements between these two Share possible sinti According to a further embodiment of the invention, the locking sleeve and threaded sleeve can also be combined into one component if the requirements with regard to the fine adjustment allow this.

The main advantages of the invention are that the desired locking positions are almost continuously adjustable and that an immediate Power transmission from the rotatable drive of the valve to the locking bolt is given. This is the locking bolt exposed to lower shear stresses when attempting to operate in the blocked position than with known locks in which the forces are transmitted through intermediate transmission elements such as threaded transmissions to be translated. The new lock is therefore less prone to failure.

With the known locks, there is also the risk that there will be manufacturing play on the transmission elements add and that, as a result, the accuracy of the setting of the desired locking position is affected. This disadvantage is avoided in the invention by the direct force intervention.

The lock according to the invention is more suitable for fittings with a large stroke, which for example Request 200 revolutions of the handwheel when actuating. With a single start thread the threaded bushing, 20 teeth on the adjusting nut and 1 mm pitch on the threaded spindle, the adjustment path of the adjusting nut is, for example, only 20 mm, while on the other hand, in the case of a previously known lock, the adjustment path is about ten times as large Advantage that in the lock according to the invention, the space requirement is much less Since the threaded spindle can only be adjusted with a special key, is an unauthorized change of a given one Lock setting impossible.

Embodiments of the invention are shown in the drawing and will be described in more detail below described. It shows

Fig. 1 is an axial section of an adjustable lock for a shut-off valve with a non-rotating rising spindle,

2 shows a cross section of the lock in the plane of the line 1-1 of FIG. 1,

Fig.3 shows a cross section of the lock in the Level of line II-II in FIG. 1,

4 shows a cross section corresponding to FIG a lock in a modified version

ίο and

FIG. 5 shows a cross section corresponding to FIG. 3 a lock in a different design.

Only the drive head is shown in FIG Shut-off valve. Since the design of the Abspcrrarmatur for understanding the invention is of no importance is omitted from the drawing.

Part of the valve housing is a drive head 1, to which the Uehäuse 1 in the present case mn four screw bolts 3 is attached. The armature spindle 4 has an external thread which runs in an internal thread of a threaded bushing 5 which is mounted in the housing 2 so as to be rotatable but not axially displaceable. The threaded bushing 5 is enclosed by a locking bushing 6 connected to it in a rotationally fixed manner. The locking sleeve 6 is rotatably and axially immovably mounted in the housing 2 and is provided with a handwheel 8 outside the housing 2. On the outer circumference, the locking sleeve 6 contains, on the one hand, a plurality of radial blind bores 9 evenly distributed over the circumference and, on the other hand, a thread 10.

In the housing 2 there is a threaded spindle at the level of the thread 10 in a bore 2a perpendicular to the main axis ii with a cndsciügcü rüiiFungSLKJizcn 12. a thread 13 in the middle area and a head piece 14 at the other end. The threaded spindle 11 is on the head piece 14 in the housing 2 with the help of a Gc-

AO winder rings 15 held in their position against axial displacement. The threaded ring 15 is screwed into an internal thread and fixed in its position, for example by riveting.

In the head piece 14 are a number on the outer circumference Contain recesses 16 into which bolts 17 engage when the head piece is in the appropriate position. These bolts can only counteract the force of a force acting on the inner end with a special key Spring 18 from the recesses 16 in the housing are pressed in so far that a rotation of the head piece 14 and thus the threaded spindle 11 is possible

An adjusting nut 19 runs on the threaded spindle 11 in the housing bore 2a, which has a straight toothing 20 on the outside, which in the thread 10 of the locking sleeve 6 engages Each rotation of the locking sleeve 6 thus causes a small rotary movement the adjusting nut 19 and thus at the same time its axial movement on the threaded spindle 11. The straight teeth 20 is approximately in the middle by a circumferential zero

21 interrupted, in soft only at a certain desired position of the adjusting nut 19 a projection

22 of a locking bolt 23 can be introduced.

The locking bolt 23 is guided in a further bore 2b of the housing 2 radially to the main axis and perpendicular to the bore Is at the level of the blind bores 9.

engage positively in one of the blind bores 9 can and in the engagement position the locking mechanism 6 and thus the shut-off valve blocked.

The locking bolt 23 is moved by a locking cylinder 25, the pin 26 of which in a groove 27 of the locking bolt 23 protrudes. The locking bolt 23 continues to carry the aforementioned projection 22. With this in mind Projection can only be inserted into a blind hole 9 if the projection 22 can engage in the circumferential groove 2t of the adjusting nut 14.

The lock cylinder 25 is positively and immovably arranged in a blind hole 2c of the housing 2 and is secured in its position by a threaded pin 28 which is secured against unintentional loosening by riveting. Its cylindrical head end 29 protrudes into a cutout 30 of the locking bolt 23 and thus secures the locking bolt 23 against rotation and at the same time limits its possible axial travel. The eccentric position of the pin 26 of the lock cylinder 25 converts a rotary movement of the lock in the lock cylinder 25 into an axial movement of the locking bolt 23.

The key 31 can only be removed when the locking bolt 23 in a desired position - in the embodiment in the blocking position - is.

To identify the position of the adjusting nut

19 a position indicator is provided, which consists of a position pointer 32 with an inwardly protruding Pin 33 engages in the circumferential groove 21 of the adjusting nut 19. Up is the pointer element through a Washer 34 secured, which is firmly connected to the locking sleeve 6, and on which the position of the blind holes 9 is highlighted. The pointer element 32 executes the axial movements of the adjusting nut 19 and shows in relation to the markings on the disc 34 when the locking bolt 13 is in a seed drill hole 9 is retractable, d. H. when the shut-off valve can be locked.

F i g. 4 shows another embodiment with regard to the design of the adjusting nut. The circumferential groove is missing here on the adjusting nut 19a. In addition, the adjusting nut 19.7 is on its from the head piece of the threaded spindle remote end extended. With this extended end 35 it protrudes into a housing in which a Microcontact 36 is arranged, which is actuated by the end of the adjusting nut 19a at a predetermined position will. Furthermore, the adjusting nut 19a is axially of an open to the locking sleeve 6 with the adjusting nut movable, but not rotatable sleeve 37 surrounded, in which a groove is included in which the projection 22 of the Locking bolt 23 can intervene. The sleeve 37, which is open on one side, contains inwardly projecting lugs at its ends 38, each of which engages in a circumferential groove 39 in the base nut 19a. The circumferential grooves 39 have a sufficiently wide distance from the central region of the adjusting nut 19a, in which the axial toothing

20 engages in the thread 10 of the locking sleeve 6. In this way, there is a weakening of the axial toothing in the area of action with the thread 10 avoided.

F i g. 5 shows an embodiment in which to actuate the locking bolt on the first lock cylinder 25 opposite side a second lock cylinder 25a is provided, which with a different key than the lock cylinder 25 is to be operated. Next is at In this embodiment, a microswitch 40 is provided which is actuated when the locking bolt 23 is in the open position will. This microswitch can be used, for example, for remote transmission of the position indicator of the locking bolt be effected.

In addition 5 sheets of drawings

Claims (1)

Patent claims: 1.Adjustable locking, especially for fittings and drive parts with a rotatable drive, such as a shut-off valve or a gate valve, with one on the drive attachment attached locking housing, a locking sleeve connected in a rotationally fixed manner to the drive, which is either rotatable with a rotating spindle, but not axially movable or is positively connected to a threaded bushing of a non-rotating spindle, and one adjustable locking bolt, which with the help of a lock cylinder, which is through a removable Key can be operated, is movable between two end divisions, marked through the following features: