SK2952001A3 - Measuring head for watermeter - Google Patents

Abstract

Capsule comprises a screw head (3) for fastening the capsule (1) to a pipeline and meter housing (2) that inserts in the screw head (3). On the side (4) of the cap closest to the screw head is a mounting lug (6) that engages with a rotation-lock-projection (13) on the screw head so that the counter cap cannot easily be removed. The mounting lug (6) requires a pre- determined torque to shear it off.

Description

Technical field

The present invention relates to a measuring capsule, in particular for a water meter, with a threaded head for fastening the measuring capsule to a conduit neck or the like. and a counter cover that can be inserted into the threaded head and is rotatably mounted thereon, the threaded head having a radial projection on the side facing the counter cover as a rotation lock.

BACKGROUND OF THE INVENTION

Measurement capsules are widely used in homes and commercial establishments to allow, for example, measuring water consumption. These measuring capsules must be replaced within fixed periods of time to ensure accurate metering of consumption. At the same time it is necessary to protect the measuring capsules against misuse and manipulation.

Conventional measuring capsules consist of a counter housing in which the counter is located and a threaded head that can be connected via a threaded segment, for example, to a water pipe and hydraulic neck (for volume recording). On the side of the threaded head facing away from the thread, the counter cover is rotatably mounted relative to the threaded head, the threaded head partially engaging the counter cover. In the hydraulics is located a blade, which is equipped with a magnetic clutch. The rotational movement of the vane is transmitted to the counter located in the counter housing, so that one revolution of the vane in the hydraulics located in the neck of the pipe is shown on the counter of the measuring capsule.

The measuring capsule is screwed in according to the state of the art by means of a special spanner which is adapted to the engagement area at the outer periphery of the threaded head. To avoid

31657 / T ··· · e ··· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · If the measuring capsule is screwed on too tightly, a tool with a limited torque must be used. Otherwise, the disassembly of the capsule may result in undesirably long disassembly times, or even damage to the pipeline until the threaded head is unscrewed from the threaded neck and the measuring capsule can be replaced. The use of a mounting tool is also time-consuming, thus increasing assembly costs. Moreover, a tool with limited torque is relatively expensive.

SUMMARY OF THE INVENTION

The present invention solves the problem of reducing the cost and time of mounting a measuring capsule on a pipe orifice.

This technical problem is solved according to the invention by means of a measuring capsule in which a mounting protrusion is placed on the side of the counter cover facing the threaded head, which protrudes into the radial protrusion of the threaded head when the threaded head is screwed. which essentially corresponds to the desired mounting torque for securing the measuring capsule.

The threaded cap of the measuring capsule can thus be screwed into the neck of the water pipe or the like. by rotating the counter cover connected to the threaded head without the tool in the mounting direction. In this case, the mounting protrusion of the counter cover abuts the radial projection of the threaded head, so that by rotating the counter cover the threaded head is simultaneously rotated and screwed in. when the defined cut-off torque is reached, the mounting lug is cut off and the counter cover is rotatable in the threaded head.

According to the invention, the mounting cover mounting protrusion has a shear resistance moment of between 5 and 50 Nm, preferably between 8 and 10 Nm. The mounting protrusion of the counter housing thus essentially has a shear resistance moment which corresponds to the torque of the measuring capsule normally used.

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The measuring capsule can be attached to the neck of the water pipe, or the like, thoroughly and with sufficient defined torque without a tool. and it is ruled out that the measuring head, due to unnecessarily high torque, is too firmly attached to the pipe neck. This also ensures easy disassembly with the usual measuring capsule tool.

According to a preferred embodiment of the present invention, an additional protrusion is provided on the counter housing as a rotation lock as required by the PTB code. Such rotation safeguards are also found on conventional measuring capsules. The second protrusion, which serves as a tamper-proof fuse, preferably has a cut-off torque that is less than the counter-protrusion mounting protrusion torque, and has the function of preventing the counter-cover from rotating back to allow manipulation of the counter status. a clear indication to the installer or to the reader of the counter.

According to the invention, the projection of the threaded head is formed as a radial bridge whose width is less than the distance between the projections on the counter cover. In this way, the radial projection of the threaded head can be positioned between the two projections of the counter housing when the counter cover is fastened in the screw head of the screw. The threaded head radial protrusion is located between the two counter housing protrusions, so that when the counter housing is rotated in the direction of mounting of the measuring capsule, i.e. for screwing the threaded portion of the screw head into the pipe neck, In this way, it is possible to define the mounting of the measuring capsule by manually rotating the counter housing until the counter housing mounting lug of the threaded head is cut off. The counter housing is then allowed to rotate freely in the threaded cap of the measuring capsule at an angle of approximately 360 ° until the mounting lug on the counter cover strikes the radial lug of the threaded cap.

31657 / T ····· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · This allows you to adjust the counter cover so that the data on the counter can be read more easily.

The projections of the counter cover preferably consist of plastic and form one piece together with the counter cover. By using plastic for the counter cover, a more reliable function of the magnetic clutch can be ensured.

Preferred embodiments of the present invention are explained in more detail below with reference to the accompanying drawings:

Fig. 1 is a schematic front view of a counter cover according to a first embodiment of the present invention

Fig. 2 is a schematic front view of a threaded head according to a first embodiment of the present invention

Fig. 3 is a schematic front view of a measuring capsule not yet folded in accordance with a first embodiment of the present invention; and

Fig. 4 is a schematic front view of a still uncompensated measuring capsule according to another embodiment of the present invention

Referring first to Figures 1 to 3, a first embodiment of a measuring capsule 1 according to the invention will be explained. The metering capsule 1 consists essentially of a counter housing 2 and a threaded head 3. The counter housing 2 is formed by a cylindrical base body having a substantially substantially flat side 4 in Figure 1. Furthermore, a mounting protrusion 6 is provided on the upper side 4 of the counter cover 2, which is formed in one piece with the counter cover.

In FIG. 2, the threaded head 3 of the measuring capsule 1 is shown schematically. The threaded head 3 also has a cylindrical base form and has an annular side 7, pointing upwards in FIG. The annular holding collar 8 projects at the outer edge of the side 7, upwards. In the engagement region 9, recesses S1 'are formed on the outer periphery of the holding collar 8

31657 / T ········ · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The side opposite to the side 7 of the threaded head 3 is provided with an external thread 10. A circular recess is formed in the center of the side 7. Further, the side 7 is provided with a circular recess 12 which is interrupted by a bridge radial projection 13 of width t.

As shown in Figure 3, the threaded head 3 can be mounted on the counter cover 2 to form the measuring capsule L of the counter cover 4 on the side 7 of the threaded head 3. The central protrusion 5 of the counter cover 2 is engaged in the circular recess 11 of the threaded head. of the head 3, while the retaining collar 8 of the threaded head 3 of the counter cover 2 at least partially embraces. By adjusting the latch, the counter cover 2 and the threaded head 3 can be secured to each other so that they are relatively rotatable relative to each other, but are held one on the other in the axial direction. The mounting protrusion 6 on the side 4 of the counter cover 2 is engaged in the circular recess 12 of the threaded head 3.

The function of the first embodiment of the measuring capsule 1 is explained below. If the counter cover 2 is mounted on the threaded head 3, the counter protrusion 6 of the counter cover 2 engages the radial projection 13 of the threaded head 3 when the counter cover 2 is rotated. If the counter cover 2 rotates further, the thread head 3 rotates with it. Through the thread 10 of the threaded head 3, the measuring capsule 1 can be screwed into the pipe neck (not shown) by manually turning the counter cover 2. Upon reaching a defined mounting torque of preferably 8 to 10 Nm, the mounting projection 6 is clipped off. The threaded head 3 is thereby tightly screwed in the pipe neck while the counter cover 2 remains freely rotatable in the threaded head 3 so as to be . data read well.

For disassembly of the measuring capsule 1, a disassembly tool is mounted in the engagement area 9 of the threaded head 3 to unscrew the entire measuring capsule 1 with the counter cover 2 and the threaded head 3 from the pipe neck. By defining the mounting torque for cutting off the mounting protrusion 6, only a small force is required to remove the measuring capsule 1, so that the measuring capsule is removed. easy to unscrew.

In FIG. 4 shows a second embodiment of the present invention. While the threaded head 3 in the second embodiment is identical to the first

31657 / T ···· · t · t · t · t · t · t · t · t · t · t · t · t · t · t · t · t · t · t By way of embodiment, a further projection 14 is located on the side 4 of the counter cover 2. The two projections 6 and 14 of the counter cover are spaced apart from one another in a circumferential direction and have substantially the same radial distance from the central projection 5 in the center of the side. the protrusion 6 corresponds to a protrusion from the first embodiment, while the disassembly protrusion 14 of the counter housing 2 is a rotary lock having a smaller diameter than the mounting protrusion 6 and thus a lower cutting torque. The distance b of the two projections 6 and 14 of the counter cover 2 is so determined that it is greater than the width t (see FIG. 2) of the radial projection 13 of the threaded head 3. When the counter cover 2 is fitted on the threaded head 3 13 so that it is positioned between the two projections 6 and 14 of the counter cover.

With one rotation of the counter cover 2 relative to the threaded head 3 in the clockwise direction, i.e. in the mounting direction, when the measuring capsule 1 is screwed into the pipe neck, the mounting lug 6 engages the radial projection 13 of the counter cover 2. Manual mounting of the measuring capsule 1 is thus possible by rotating the counter cover 2 as long as the mounting lug 6 is cut off when the defined torque is reached. The counter cover 2 is now freely rotatable in a range of about 360 ° relative to the threaded head 3 until the radial projection 13 of the threaded head 3 hits the removal cover 14 of the counter cover 2. Adjusting the counter cover 2 to improve the readability of the counter in the counter cover on the other hand, it is not possible to reverse the counter cover 2, since the disassembly projection 14 is then cut off by the radial projection 13 of the threaded head 3. In this way, a strong indication of the attempt to manipulate the measuring capsule 1 is achieved

The disassembly shown in FIG. 4, as already explained in the first embodiment, is carried out by means of a disassembly tool engaging in the area 9 of the threaded head 3.

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Claims (9)

PATENT CLAIMS A measuring capsule, in particular for a water meter, with a threaded head (3) for fastening the measuring capsule (1) to a pipe neck or the like. and a counter cover (2) which is mountable on and rotatably mounted on the threaded head (3), the threaded head (3) on the side (4,7) adjacent to the counter cover (2) being provided with a radial projection (13) An anti-rotation lock, characterized in that on the side of the counter cover (2) which faces the threaded head (3), there is a mounting projection (6) which, when screwing the threaded head (3) into the neck the pipe engages on the radial projection (13) and that the mounting projection (6) exhibits a defined moment of shear resistance. Measuring capsule according to claim 1, characterized in that the mounting protrusion (6) of the counter cover (2) has a shear resistance moment of between 5 and 50 Nm, preferably between 8 and 10 Nm. Measuring capsule according to one of the preceding claims, characterized in that the counter cover (2) is provided with a disassembling projection (14) as a rotation lock. Measuring capsule according to claim 3, characterized in that the disassembly projection (14) has a lower cutting torque than the mounting projection (6). Measuring capsule according to one of the preceding claims, characterized in that the radial projection (13) of the threaded head (3) is designed as a radial bridge which is preferably located in a circular recess (12) on the threaded side (7) the head (3) facing the counter cover (2). 31657 / T «99 · 99 99 9 9,999 99 99 99 9 9 Measuring capsule according to claim 5, characterized in that the width (t) of the bridge is smaller than the distance (b) between the protrusions (6,14) of the counter cover. Measuring capsule according to one of claims 3 or 6, characterized in that the projection (13) of the threaded head (3) is arranged between the projections (6, 14) of the counter cover (2). Measuring capsule according to one of the preceding claims, characterized in that the mounting protrusion (6) and / or the removal protrusion (14) of the counter cover (2) is made of plastic. Measuring capsule according to one of the preceding claims, characterized in that the mounting protrusion (6) and / or the removal protrusion (14) of the counter cover (2) is integrally formed with the counter cover (2).