CN203259507U - Device for fixing and adjusting sensors - Google Patents

Abstract

The utility model discloses a fixed adjustment device for a sensor. The device is arranged around the outer circle of a pipeline, and comprises a sensing device, an adjustment device, and a fixing belt. The fixing belt is arranged around the outer circle of the pipeline. Several adjusting devices are set in the direction, and the sensing device is movable inside the adjusting device; the adjusting device includes adjusting screws, clamps, and baffles; the sensing device includes a sensor, a sensor housing, and a coaxial cable interface, and the sensor includes a piezoelectric element, a back The lining layer; the fixing belt is provided with several coaxial cable interface holes 2, the adjustment screw hole, and the fixing belt connection hole; this device can adjust the number of sensing devices and adjusting devices according to the size of the pipe diameter, and can realize the detection of different pipe diameters ; The piezoelectric element protrudes from the lower end of the backing layer, which can ensure that the guided wave is efficiently transmitted into the pipeline; the coaxial cable interface connected to the lead wire of the piezoelectric element can eliminate the electromagnetic interference of the connecting line and ensure the accuracy of the detection.

Description

Fixed adjustment device for sensor

technical field

The utility model relates to a fixed adjusting device, in particular to a device for fixing an adjusting sensor.

Background technique

At present, the conventional methods for non-destructive testing of pipelines mainly include ultrasonic, ray, magnetic particle, infiltration and eddy current techniques, but these testing techniques have their insurmountable defects, for example: off-line point-by-point testing is necessary, the detection efficiency is low and the pipeline needs to be removed. The cladding layer, the operation is troublesome and the cost is high.

Ultrasonic guided wave technology is an online detection technology, which can obtain the health status of the entire pipeline at one excitation, overcome the point-by-point detection technology required by conventional detection technology, and greatly improve the detection efficiency. The longitudinal mode guided wave propagates axisymmetrically in the pipeline, and the propagation speed is the fastest in the low frequency field. The position of the received defect echo is located before the clutter. Research hotspots. However, due to the complexity of the surface conditions of the pipeline (such as rust and pits), the guided wave excited by the sensor cannot be efficiently transmitted into the pipeline, resulting in a serious loss of signal energy; in addition, the current ultrasonic guided wave sensor fixing device is only for a single pipe diameter When the pipe diameter changes, it is necessary to carry multiple sensor fixing devices, which is not only difficult to install and disassemble, but also time-consuming and labor-intensive.

Contents of the invention

The purpose of the utility model is to provide a sensor fixing and adjusting device that can be quickly assembled and disassembled and adapted to different pipe diameters.

The utility model is realized through the following technical solutions:

A fixed adjustment device for a sensor, the device is arranged around the outer circle of the pipeline, including a sensing device, an adjustment device, and a fixing belt, the fixing belt is arranged around the outer circle of the pipeline, and several adjusting device, the sensing device is movable inside the adjustment device; the adjustment device includes an adjustment screw, a clamp, and a baffle. There is a clamp cavity inside the clamp, and the clamp cavity is in the shape of an inverted "convex". Axial cable interface hole 1, an adjusting screw is provided on both sides of the coaxial cable interface hole 1, the adjusting screw penetrates into the cavity of the fixture, and a baffle is provided on both sides of the fixture; the sensing device includes a sensor, a sensor housing, Coaxial cable interface, the sensor housing is an inverted "convex" shaped shell, the upper end is provided with a coaxial cable interface, the sensor includes a piezoelectric element, a backing layer, the piezoelectric element is cast on the lower end of the backing layer, and the piezoelectric element The lead wire is connected to the coaxial cable interface, and the sensor is fixed on the lower end of the sensor housing through the backing layer; the fixing belt is provided with several coaxial cable interface holes. There are several coaxial cable interface holes 2 in the middle, and several fixing belt connection holes and adjusting screw holes are respectively arranged along the two sides of the coaxial cable interface hole 2 from the outside to the inside. The shape is snapped into the inverted "convex" shape of the fixture cavity, and the coaxial cable interface of the sensing device is snapped into the coaxial cable interface hole 1 of the fixture and the coaxial cable interface hole 2 of the fixing belt in turn. The screw passes through the adjusting screw hole of the fixing belt, and the adjusting device passes through the connecting hole of the fixing belt through the screw and is arranged on the fixing belt.

The purpose of this utility model can also be further realized through the following technical measures:

In the aforementioned sensor fixing and adjusting device, a protective layer is provided at the lower end of the piezoelectric element of the sensor.

In the aforementioned sensor fixing and adjusting device, the piezoelectric element of the sensor protrudes from the lower end of the backing layer.

The fixing and adjusting device of the aforementioned sensor, the fixing belt is made of PVC material.

The utility model surrounds the outer circle of the pipeline with a flexible PVC fixing belt, adjusts the number of sensing devices and adjusting devices according to the size of the pipe diameter, and can realize the detection of different pipe diameters, and can be fixed by connecting the fixing belt end to end The belt is easy to operate; the sensor clamped in the fixture can be closely attached to the pipe by adjusting the screw, and the piezoelectric element protrudes from the lower end of the backing layer to ensure that the guided wave is efficiently transmitted into the pipe; due to the piezoelectric element The strength is not high, and there is a protective layer on its surface, which can improve the wear resistance and strength of the piezoelectric element; in order to eliminate the electromagnetic interference of the connecting line, a coaxial cable interface is used to connect the lead wire of the piezoelectric element to ensure the accuracy of detection .

The advantages and characteristics of the invention are illustrated and explained by the following non-limiting description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is the front view of the adjusting device of the present utility model;

Fig. 3 is the B-B sectional view of the utility model;

Fig. 4 is the front view of the sensing device of the present utility model;

Fig. 5 is a left view of the sensing device of the present invention;

Fig. 6 is an assembly diagram of the adjusting device and the sensing device of the present invention;

Fig. 7 is A enlarged view of the utility model;

Fig. 8 is a front view of the fixing belt of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model includes a sensing device 1, an adjusting device 2, and a fixed belt 3. The fixed belt 3 is made of PVC material, which can be arranged around the outer circle of the pipeline 4, and 10 along the length direction of the fixed belt 3. There is an adjusting device 2, and the sensing device 1 is movably arranged inside the adjusting device 2.

As shown in Figures 2 and 3, the adjustment device 2 includes an adjustment screw 20, a clamp 21, and a baffle plate 22. A clamp cavity 210 is provided inside the clamp 21, and the clamp cavity 210 is in an inverted "convex" shape. The upper end is provided with a coaxial cable interface hole 211, and an adjusting screw 20 is provided on both sides of the coaxial cable interface hole 211, and the adjusting screw 20 runs through the clamp cavity 210, and a baffle plate 22 is provided on each side of the clamp 21 .

As shown in Figure 4, the sensing device 1 includes a sensor 10, a sensor housing 11, and a coaxial cable interface 12. The sensor housing 11 is an inverted "convex" shaped housing, and its upper end is provided with a coaxial cable interface 12; As shown in Fig. 5 and Fig. 7, the sensor 10 includes a piezoelectric element 101, a backing layer 102, and a protective layer 103. The piezoelectric element 101 is cast on the lower end of the backing layer 102, and the lower end of the piezoelectric element 101 is provided with a protective layer 103. The lead wire of the element 101 is connected to the coaxial cable interface 12 , the sensor 10 is fixedly arranged at the lower end of the sensor housing 11 through the backing layer 102 , and the piezoelectric element 101 protrudes from the lower end of the backing layer 102 .

As shown in Figure 8, the fixed belt 3 is provided with several coaxial cable interface holes 230, adjustment screw holes 31, fixed belt connection holes 32, and several coaxial cable interface holes 30 are provided along the middle part of the fixed belt length direction. Two sides of the coaxial cable interface hole 2 are respectively provided with several fixing belt connection holes 32 and adjustment screw holes 31 from the outside to the inside.

As shown in Figure 6, the sensing device 1 is clamped in the inverted "convex" shape of the clamp cavity 210 of the clamp 21 through the inverted "convex" shape of the sensor housing 11, and the coaxial cable interface 12 of the sensing device 1 Clamped in the coaxial cable interface hole 1 211 of the clamp 21 and the coaxial cable interface hole 2 30 of the fixing belt 3 in turn, the adjusting screw 20 passes through the adjusting screw hole 31 of the fixing belt 3 and is tightened on the adjusting device and compressed The sensor 10 and the adjusting device 2 are arranged on the fixing belt 3 through the fixing belt connecting hole 32 through screws.

Set the fixing band 3 around the outer circle of the pipeline 4, and its head and tail are connected and fixed by screws, and the adjusting screw 20 is tightened so that the sensor 10 is pressed against the outer circle of the pipeline 4. At this time, the detection can be carried out. After the detection is completed, The device can be disassembled by loosening the screws connecting the end to the end, and the adjustment device and the sensing device can be increased or decreased according to different pipe diameters.

In addition to the above-mentioned embodiments, the utility model can also have other implementation modes, and all technical solutions formed by equivalent replacement or equivalent transformation all fall within the scope of protection required by the utility model.

Claims (4)

1. A fixed adjustment device for a sensor, which is arranged around the outer circle of the pipeline, and is characterized in that: it includes a sensing device, an adjustment device, and a fixing belt, and the fixing belt is arranged around the outer circle of the pipeline, along the Several adjustment devices are arranged in the length direction of the fixing belt, and the sensing device is movably arranged inside the adjustment device; In the shape of "convex", a coaxial cable interface hole is provided at the upper end of the clamp cavity, and an adjusting screw is provided on both sides of the coaxial cable interface hole, and the adjusting screw runs through the clamp cavity. , the two sides of the clamp are respectively provided with a baffle; the sensing device includes a sensor, a sensor housing, and a coaxial cable interface. The cable interface, the sensor includes a piezoelectric element and a backing layer, the piezoelectric element is cast on the lower end of the backing layer, the lead wire of the piezoelectric element is connected to the coaxial cable interface, and the sensor is fixed through the backing layer At the lower end of the sensor housing; the fixed belt is provided with several coaxial cable interface holes 2, adjustment screw holes, and fixed belt connection holes, and several coaxial cable interface holes 2 are provided along the middle of the fixed belt length direction, along the coaxial The two sides of the cable interface hole 2 are respectively provided with several fixing belt connection holes and adjustment screw holes from the outside to the inside. In the shape of ", the coaxial cable interface of the sensing device is clamped in the coaxial cable interface hole 1 of the fixture and the coaxial cable interface hole 2 of the fixing belt in turn. The adjusting screw passes through the adjusting screw hole of the fixing belt, and the adjusting device The screws pass through the connecting holes of the fixing belt and are arranged on the fixing belt. 2. The sensor fixing and adjusting device according to claim 1, wherein a protective layer is provided at the lower end of the piezoelectric element of the sensor. 3. The sensor fixing and adjusting device according to claim 1 or 2, characterized in that: the piezoelectric element of the sensor protrudes from the lower end of the backing layer. 4. The sensor fixing and adjusting device according to claim 1, characterized in that: the fixing belt is made of PVC material.

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