JP2559329Y2 - Vibration sensor mounting bracket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration sensor mounting device, and more particularly, to a vibration sensor mounting device capable of securely fixing a vibration sensor to an object to be measured.

[0002]

2. Description of the Related Art Conventionally, equipment diagnosis technology of a rotary reciprocating machine has been dramatically improved by adopting a vibration online monitoring system. However, the measurement accuracy of each vibration sensor is not necessarily improved.

[0003] This is because in general, the selection of the mounting location of the vibration sensor or the mounting method of the vibration sensor is inappropriate.

[0004] In order to detect vibrations with high accuracy, it is said that the finishing accuracy of the detection surface is important. However, the vibration sensor mounting portions of the equipment such as bearings are often left as-cast or have curved surfaces. Because of the complicated shape, a good detection surface tends not to be secured.

Particularly, vibration sensors used in vibration monitoring systems in factories handling dangerous substances such as petroleum refining and petrochemicals are naturally required to be of an intrinsically safe explosion-proof type. Tend to. Therefore, the mounting location of the vibration sensor must necessarily be selected and screwed to a strong part in the bearing structure, which is considerably limited in location. If the device under test (vibration source) is a new device, a vibration sensor mounting part can be provided in advance, but since the device under test is more of an existing device, it is costly to perform machining again. There was a problem that it became expensive. If the flat vibration sensor mounting part is not provided in advance or after processing, the vibration sensor can be attached with an adhesive or attached with screws using a mounting tool. In addition, it is troublesome, and in the case of online monitoring, there is a problem in maintainability or long-term reliability. In the case of screwing using a mounting tool, the screw section may be of an integral structure in the conventional mounting tool, and if the fixing is insufficient, the screw may be broken, which is a problem in vibration measurement. Had become.

FIGS. 8 (front view) to FIG. 9 show a conventional fixture.
As shown in (plan view), a structure is often used in which only a female screw hole at the bottom center portion is screwed to a tap or screw previously screwed in. In order to transmit the signal to the sensor, it is necessary to bring the sensor into close contact with a smooth surface that has been locally filed. However, since the detecting and extracting portion is unavoidably formed as a small diameter screw due to a small area, mounting problems such as breaking of the screw due to strong tightening often occur.

A commercially available vibration sensor is provided with a disk-shaped pedestal (flange) at the bottom in addition to such a center screw type, and several vertical through-holes are formed substantially radially in the pedestal. Although there is a vibration sensor mounting device (hereinafter referred to as a flange mounting type), there is no vibration sensor mounting device that can be used for both of them, so that each requires a separate mounting device, which is troublesome.

As a result of various studies, the present inventors have found that the above problem can be solved by devising the shape of a vibration sensor attachment as an attachment, and arrived at the present invention.

[0009]

The object of the present invention is to provide a reliable vibration sensor mounting simply by screwing in, even if a flat vibration sensor mounting portion is not prepared, and a center screw fixing type and a flange mounting type. It is an object of the present invention to provide a vibration sensor fixture that can be used for both sensors and that can be used for simultaneous measurement of many points.

[0010]

According to the present invention, a female screw hole which opens downward is formed at the center of the bottom surface of a disk-shaped pedestal having a plurality of radially arranged mounting holes drilled in the thickness direction.
A vibration is characterized in that an even-numbered prism-shaped projection is integrally formed with the disc-shaped pedestal at the center of the upper surface of the pedestal, and a female screw hole that opens upward is formed at the center of the upper surface of the projection. The vibration sensor mounting device according to claim 1, wherein the sensor mounting device is a female screw hole whose opening is a through female screw hole and the female screw hole opening at the center is a bottomed female screw hole. 2. The vibration sensor mounting device according to claim 1, wherein the mounting hole is a long hole whose major axis extends along the radial direction, and the even-numbered prism-shaped projection is a quadrangular prism or a hexagonal prism. The vibration sensor mounting according to any one of claims 1 to 3 (claim 4), which is a projection of (1) to (3).

Hereinafter, the present invention will be described in detail using embodiments.

[0012]

1, 2 and 3 are a front view, a plan view and an AA sectional view, respectively, of an embodiment of the present invention.

In FIGS. 1, 2 and 3, reference numeral 1 denotes a disk-shaped pedestal (flange), 2 denotes a female screw hole radially formed in the disk-shaped pedestal, and 3 denotes a hole formed in the center of the bottom surface. 4 is a hexagonal columnar projection, and 5 is a female screw hole that opens upward at the center of the upper surface of the hexagonal columnar projection. 100
Is a vibration sensor attachment.

FIGS. 4 and 5 are cross-sectional views taken along line AA of another embodiment of the present invention. In this case, the upper opening female screw hole 5 at the center and the bottom lower opening screw hole 3 penetrate. FIG.
In the above case, the inner diameter of the upper opening female screw hole 5 is larger than the inner diameter of the lower opening female screw hole.
Further, the female screw hole is appropriately sized according to the shape of the measured portion, the size of the vibration sensor, and the like. In FIG. 5, the upper opening screw hole 5 and the lower opening screw hole have the same inner diameter, and the tap can be shared.

FIG. 6 is a bottom view of another embodiment in which the mounting holes are radial slots 2A. The long axis of the long hole extends in the radial direction of the flange and penetrates up and down, but there is no female screw on the inner surface. Therefore, the vibration sensor is fixed by the bolt and nut. This type has high versatility and can fix vibration sensors of various sizes. Since the mounting hole or stud of the flange of the vibration sensor on the other side is fixed in the radial direction, no displacement occurs even if the attachment side is a long hole.

FIG. 7 shows a vibration sensor 200 on the side of a pump bearing 10 (the internal structure is not shown).
It is a perspective view showing the state attached via 00.

In FIG. 7, the vibration sensor mounting member is attached to the side surface of the pump bearing 10 by a slightly thicker single screw, and female screw holes 2 and 2 radially opened at intervals of 60 ° are formed in the pedestal portion. The vibration sensor 200 having a triangular pedestal is mounted on the fixture 1 by taps or screws 8.
It is attached to 00.

In this case, no matter where the mounting fixture is stopped, the sensor cable 20 can be selected by using the mounting hole (screw hole).
It is easy to mount so that 1 faces substantially vertically downward.

Therefore, unlike the case of using the conventional mounting device, the sensor cable 201 is unlikely to be forcibly twisted.
The service life of the sensor cable is extended and accurate measurement is possible.

[0020]

According to the present invention, all of the above objects are achieved by implementing the present invention.

That is, even if a particularly flat vibration sensor mounting portion is not prepared, the vibration sensor can be securely mounted only by screwing, and can be used for both the center screw fixing type and the flange mounting type sensors. Yes, simultaneous measurement at multiple locations is facilitated. In particular, since the sensor mounting fixture uses a total screw type such as a hexagonal set screw in the upper opening screw hole, it can be easily replaced even if the screw is damaged at the time of maintenance, etc. Even if any of the screws of the sensor attachment is damaged, it is possible to cope with the small diameter screw by about one size increase, and the sensor attachment can be used effectively. Further, since it is easy to arrange the sensor cable vertically below, the life of the sensor cable can be extended, and the occurrence of noise due to disconnection or the like can be reduced. Also, since it can be used for many screw-mounted vibration sensors, it can be mass-produced and provided at low cost.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line AA of another embodiment.

FIG. 5 is a sectional view taken along line AA of another embodiment.

FIG. 6 is a bottom view of another embodiment.

FIG. 7 is a perspective view of the embodiment in use.

FIG. 8 is a front view of a conventional example.

FIG. 9 is a plan view of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 disk-shaped pedestal (flange) 2 penetrating female screw hole 2A penetrating elongated hole 3 bottomed female screw hole 4 hexagonal columnar projection 5 bottomed female screw hole 100 vibration sensor mounting tool

Claims (4)

(57) [Scope of request for utility model registration] A female screw hole is formed at the center of the bottom surface of a disk-shaped pedestal having a plurality of radially arranged mounting holes formed in the thickness direction. A vibration sensor mounting tool, wherein an even-numbered prism-shaped protrusion is integrally formed with the disc-shaped pedestal, and a female screw hole that opens upward is formed in the center of the upper surface of the protrusion. 2. The vibration sensor mounting device according to claim 1, wherein the mounting hole is a through female screw hole, and the female screw hole opening at the center is a bottomed female screw hole. 3. The vibration sensor mounting according to claim 1, wherein the mounting hole is a long hole whose major axis extends along the radial direction. 4. The vibration sensor attachment according to claim 1, wherein the even-numbered prism-shaped projection is a quadrangular prism or a hexagonal column-shaped projection.