Securing device and ultrasonic measuring device

Abstract

The invention relates to a securing device (20) which is designed to secure at least one clamp-on ultrasonic converter (10) of an ultrasonic measuring device (1) on a media-conducting pipeline (50), comprising: a main part (21) which is designed to be placed on a support device (11) of a clamp-on ultrasonic converter of the at least one clamp-on ultrasonic converter; a clamping device (24) for generating a tensile force on the pipeline; and at least one clamping element (22), each of which comprises two ends (22.1), such as a chain or a belt for example, for transmitting the tensile force. The invention is characterized in that the securing device has a rocking device (24) which is designed to compensate for tilting torques on the support device in the installed state.

Description

[0001] Fixing device and ultrasonic measuring device

[0002] The invention relates to a fastening device for fastening a clamp-on ultrasonic transducer to a pipeline, a clamp-on ultrasonic transducer and an ultrasonic measuring device

[0003] Clamp-on ultrasonic measuring devices, such as those shown in DE102016119910A1, feature ultrasonic transducers that are attached to the outside of media-carrying pipes. Typically, fastening straps or bands are used to secure such ultrasonic transducers. However, this can lead to displacement of the ultrasonic transducer during installation.

[0004] The object of the invention is therefore to propose a fastening device, a clamp-on ultrasonic transducer and an ultrasonic measuring device so that a fastening of a clamp-on ultrasonic transducer can be carried out precisely, safely and robustly.

[0005] The object is achieved by a fastening device according to independent claim 1, by an ultrasonic transducer according to independent claim 8 and by an ultrasonic measuring device according to independent claim 9.

[0006] A fastening device according to the invention configured for fastening at least one clamp-on ultrasonic transducer of an ultrasonic measuring device to a media-carrying pipeline comprises: a base body configured for placement on a support device of a clamp-on ultrasonic transducer of the at least one clamp-on ultrasonic transducer; a tensioning device for generating a tensile force on the pipeline; at least one tensioning element, each with two ends, such as a chain or a band, configured to transmit the tensile force; wherein the fastening device has a rocking device configured to compensate for tilting moments on the support device in the mounted state.In one embodiment, the rocking device has a rocker with two ends and a central region, which rocker is mounted in the central region on the base body in a rotationally movable manner by means of a rotary bearing of the base body, wherein in the assembled state one end of a tensioning element is fastened to one end of the rocker, or wherein the at least one tensioning element runs in sections along the rocker and the ends of the rocker deflect at least one of the at least one tensioning element.

[0007] In one embodiment, the fastening device has two clamping elements and a counter arm of the rocking device, wherein the base body, the clamping elements and the counter arm are designed to engage around the pipeline, wherein the counter arm is designed to be movably mounted on the pipeline in a plane through a pipeline cross-section, wherein the counter arm is mechanically connected to the base body by means of the two clamping elements, wherein the clamping device is designed to act against a counter arm placed on the pipeline.

[0008] In one embodiment, the tensile force can be generated at at least one of the two ends of the tensioning device, for example by means of a screwing device, or wherein the ends each overlap one of the at least one tensioning element, wherein the tensile force can be adjusted by means of the tensioning device, for example by means of a screwing device, by changing the overlap.

[0009] In one embodiment, the clamping device is designed to produce a contact force of 1000 Newtons.

[0010] In one embodiment, the rocker and the base body are each made of a metal such as aluminum or steel.

[0011] In one embodiment, the clamping element is made of a metal such as aluminum or steel.

[0012] A clamp-on ultrasonic transducer according to the invention comprises: an ultrasonic transducer element for generating and detecting ultrasonic signals; a coupling body for transmitting ultrasonic signals between the ultrasonic transducer and the pipeline; a support device for supporting the fastening device according to one of the preceding claims, wherein the support device is configured to act directly or indirectly against the coupling body.

[0013] An ultrasonic measuring device according to the invention comprises: at least one clamp-on ultrasonic transducer for measuring a measured variable such as, for example, the speed of sound or the flow rate of a medium, fastened to a media-carrying pipeline with a fastening device according to one of the preceding claims; an electronic measuring / operating circuit for operating the at least one ultrasonic transducer and for detecting and evaluating measurement signals from the at least one ultrasonic transducer and for providing measured values ​​of a measured variable, wherein the pipeline has a pipeline diameter, wherein the rocker has an extension of at least one pipeline diameter in a cross-sectional plane through the pipeline.

[0014] In the following, the invention is described using exemplary embodiments.

[0015] Fig. 1 a) and b) show an exemplary embodiment of the fastening device according to the invention;

[0016] Fig. 2 shows an exemplary embodiment of the fastening device according to the invention;

[0017] Fig. 3 shows an exemplary design of an ultrasonic measuring device with clamp-on ultrasonic transducers.

[0018] Fig. 1 a) shows a front view and Fig. 1 b) shows an oblique view of an exemplary fastening device 20 according to the invention in the mounted state on a pipeline 50, which presses a support device 11 of an exemplary clamp-on ultrasonic transducer according to the invention towards the pipeline. For this purpose, a tensile stress is exerted against the pipeline via at least one tensioning element 22. According to the invention, the fastening device 20 has a rocker device 24, which, as shown here, can have a rocker 25 with two ends 25.1 and a central region 25.2. The rocker 25 is rotatably mounted on a base body 21 of the fastening device 20 by means of a rotary bearing 21.1. Due to the rotatable mobility, the rocker can reduce the generation of tilting forces and tilting moments, so that a force exerted on the ultrasonic transducer is essentially normal to a surface of the pipeline.

[0019] As shown here, a clamping element 22 can be provided to encompass the pipeline. As shown here, in this case, one end 22.1 of the clamping element can be fastened to one end 25.1 of the rocker, with a clamping device 23 for generating tensile stress in a clamping element being provided at at least one end of the rocker. This can be accomplished, for example, via a screw device 23.1. With two clamping devices per clamping element, as shown here, tilting of the ultrasonic transducer can be even more effectively prevented.

[0020] In one embodiment, an extension 25.3 of the rocker in a cross-sectional plane through the pipeline is at least one pipeline diameter 51. In this way, tilting of the ultrasonic transducer can be better avoided.

[0021] A clamp-on ultrasonic transducer 10 has a support device 11 for supporting a fastening device and for holding a coupling body 12 of the clamp-on ultrasonic transducer, wherein an ultrasonic transducer element 13 for generating and detecting ultrasonic signals is arranged on the coupling body.

[0022] Fig. 2 shows an oblique view of an exemplary fastening device 20 according to the invention in the mounted state on a pipeline 50, which presses a support device 11 of an exemplary clamp-on ultrasonic transducer according to the invention in the direction of the pipeline. For this purpose, a tensile stress is exerted against the pipeline via a counter arm 26 via at least two clamping elements 22, wherein the two clamping elements each act on one end of the counter arm. The base body 21, the clamping elements and the counter arm encompass the pipeline 50 in the mounted state, wherein the counter arm is configured to be movably mounted on the pipeline in a plane through a pipeline cross-section. In this way, it is able to rock counteract tilting moments when tilting moments occur. The counter arm thus forms an exemplary rocking device according to the invention.

[0023] Fig. 3 outlines an exemplary schematic clamp-on ultrasonic measuring device 1 with two clamp-on ultrasonic transducers 10, which are arranged on an outer side of the pipeline 50. An electronic measuring / operating circuit 30 is configured to operate the clamp-on ultrasonic transducers, to evaluate measurement signals from the clamp-on ultrasonic transducers, and to provide measured values ​​of a measured variable. Such a measured variable can be, for example, a flow velocity or a speed of sound of a medium flowing through the pipeline. A transit time or transit time difference method can be used, for example. The number of clamp-on ultrasonic transducers shown here, as well as their arrangement, is purely exemplary and should not be interpreted as restrictive. The ultrasonic transducers can each be fastened with a fastening device according to the invention.

[0024] List of reference symbols

[0025] 1 ultrasonic measuring device

[0026] 10 clamp-on ultrasound transducers

[0027] 11 Carrying device

[0028] 12 coupling bodies

[0029] 13 ultrasonic transducers

[0030] 20 Fastening device

[0031] 21 basic body

[0032] 21.1 Rotation bearing

[0033] 22 clamping element

[0034] 22.1 End of the clamping element

[0035] 23 Clamping device

[0036] 23.1 Screwing device

[0037] 24 Rocker device

[0038] 25 seesaw

[0039] 25.1 End of the seesaw

[0040] 25.2 Central area of ​​the seesaw

[0041] 25.3 Extension of the seesaw

[0042] 26 Counter arm

[0043] 30 electronic measuring / operating circuit

[0044] 50 pipeline

[0045] 51 pipe diameters

Claims

Patent claims 1. A fastening device (20) configured for fastening at least one clamp-on ultrasonic transducer (10) of an ultrasonic measuring device (1) to a media-carrying pipeline (50), comprising: a base body (21) configured for placement on a support device (11) of a clamp-on ultrasonic transducer of the at least one clamp-on ultrasonic transducer; a tensioning device (24) for generating a tensile force on the pipeline; at least one tensioning element (22), each with two ends (22.1), such as a chain or a band, configured to transmit the tensile force; characterized in that the fastening device has a rocking device (24) configured to at least partially prevent the generation of tilting forces and tilting moments on the support device.

2. Fastening device according to claim 1, wherein the rocker device has a rocker (25) with two ends (25.1) and a central region (25.2), which rocker is mounted in the central region by means of a rotary bearing (21.1) of the base body in a rotationally movable manner on the base body, wherein in the assembled state one end of a tensioning element (22.1) is fastened to one end of the rocker, or wherein the at least one tensioning element (22) runs in sections along the rocker and the ends of the rocker deflect at least one tensioning element of the at least one tensioning element.

3. Fastening device according to claim 1, wherein the fastening device (20) has two clamping elements (22) and a counter arm (26) of the rocking device (24), wherein the base body (21), the clamping elements and the counter arm are designed to encompass the pipeline (50), wherein the counter arm is designed to be movably mounted on the pipeline in a plane through a pipeline cross-section, wherein the Counter arm is mechanically connected to the base body by means of the two clamping elements, wherein the clamping device (22) is designed to act against the counter arm (26) placed on the pipeline.

4. Fastening device according to one of claims 2 or 3, wherein the tensile force can be generated at at least one of the two ends of the tensioning device (23), for example by means of a screw device (23.1), or wherein the ends each overlap one of the at least one tensioning element (22), wherein the tensile force can be adjusted by means of the tensioning device, for example by means of a screw device (24.1), by changing the overlap.

5. Fastening device according to one of the preceding claims, wherein the clamping device (23) is designed to cause a contact force of 1000 Newtons.

6. Fastening device according to one of the preceding claims, wherein the rocker (25) and the base body (21) are each made of a metal such as aluminum or steel.

7. Fastening device according to one of the preceding claims, wherein the clamping element (22) is made of a metal such as aluminum or steel.

8. A clamp-on ultrasonic transducer comprising: an ultrasonic transducer element (13) for generating and detecting ultrasonic signals; a coupling body (12) for transmitting ultrasonic signals between the ultrasonic transducer and the pipeline; a support device (11) for supporting the fastening device (20) according to one of the preceding claims, wherein the support device is designed to act directly or indirectly against the coupling body.

9. Ultrasonic measuring device (1) comprising: at least one clamp-on ultrasonic transducer (10) for measuring a measured variable such as the speed of sound or flow rate of a medium, fastened to a media-carrying pipeline (50) with a fastening device according to one of the preceding claims; an electronic measuring / operating circuit (30) for operating the at least one ultrasonic transducer and for detecting and evaluating measurement signals from the at least one ultrasonic transducer and for providing measured values ​​of a measured variable, wherein the pipeline has a pipeline diameter (51), wherein the rocker (25) has an extension (25.3) of at least one pipeline diameter in a cross-sectional plane through the pipeline.

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