JPH0413629Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an ultrasonic transmitter/receiver for a flowmeter.
In particular, the present invention relates to an ultrasonic transmitter/receiver for a flowmeter, which is entirely fixed to the outer surface of a pipe to be measured by a cable member such as a chain, and is equipped with two ultrasonic transducers for transmission and reception.

[Conventional technology]

There are various conventional ultrasonic transmitting and receiving devices for flowmeters, such as those disclosed in Japanese Utility Model Publication No. 50-6857 and Japanese Utility Model Application Publication No. 59-41724.

All of these disclose methods for efficiently attaching a transducer attachment device to a large-diameter pipe, and have achieved some results in this respect.

[Problem that the invention attempts to solve]

However, in these conventional examples, setting the positions between the transducers and moving the set positions is done while taking measurements each time, which makes setting the transducers time-consuming. However, there was a disadvantage that flow rate measurement could not be carried out quickly.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ultrasonic transmitter/receiver for a flowmeter that can improve the disadvantages of the conventional example and allow the setting of the transducer to be performed quickly and with high precision.

[Means for solving problems]

Therefore, in the present invention, a frame body for mounting a transducer is formed by two frame plates facing each other and a block-shaped spacer member fixedly attached between both ends of the two frame plates. Ultrasonic transducers for the flowmeter are installed at two locations between the frame plates, and a transducer locking means for pressing and locking the transducers with a leaf spring member is installed on the frame body. Equipped at the location where the wave device is installed. In an ultrasonic transmitter/receiver for a flowmeter, the ultrasonic transmitter/receiver for a flowmeter is equipped with a cable-like member such as a chain that wraps and fixes the frame around the pipe to be measured using its spacer member.
A configuration in which a scale plate is fixed to the outer end surface of one of the frame plates, a vernier scale is attached to each transducer corresponding to the scale plate, and the scale line of this vernier scale is set to be relatively long. are being taken. This aims to achieve the above-mentioned purpose.

[First embodiment of the invention] The first embodiment of the invention will be described below with reference to Figs. 1 to 4.
This will be explained based on the diagram.

In these figures, numeral 1 indicates a pipe to be measured, numeral 2 indicates a liquid such as water flowing inside the pipe to be measured 1 (see Fig. 4), and numeral 3 indicates a transducer of an ultrasonic flowmeter. The mounting device is shown.

The transducer mounting device 3 includes a frame 4 and a frame 4.
Two sets of frame body fixing means 5 and 6 for fixing both ends of the tube to the tube to be measured 1, and an ultrasonic transducer 7 on the frame body 4.
It is comprised of two sets of transducer attachment means 8 and 9, which have the function of attaching and fixing the transducers A and 7B and adjusting the pressing force of the transducers 7A and 7A.

Among these, the frame body 4 includes a pair of frame plates 4 having an L-shaped cross section.
0, 41, and spacer members 42, 43 fixed to both ends of each frame plate 40, 41 by screws as shown. Frame board 40,
41 is a member having an L-shaped cross section, and one of the protruding parts 40A and 41A (see FIG. 4) is arranged so as to protrude toward the outside as shown in the figure, and the other protruding parts 40A and 41B are They are equipped opposite each other. A pair of ultrasonic transducers 7A and 7B for transmitting and receiving the waves described above are disposed between the other protrusions 40B and 41B as shown in the figure.

One spacer member 42 of the frame body 4 has a V-shaped cut surface 42A at the portion that comes into contact with the tube to be measured 1, which allows the tube to be measured to have a relatively small diameter as shown in FIG. It is designed so that it can effectively abut against the pipes 1A and 1B and fix the above-mentioned transducers 7A and 7B. The other spacer member 43 (see FIG. 3) is also formed in exactly the same manner.

In addition, the lower end portions of the frame plates 40 and 41 in FIG. 2, that is, the portions that contact the tube to be measured 1, protrude beyond the end surface 42C of the V-shaped cut surface 42A of the spacer member 42, and Therefore, as shown in FIG. 2, relatively large pipes 1C and 1D are
The cut surface 42A can effectively abut against the cut surface 42A and function in the same manner as the V-shaped cutting surface 42A described above.

Furthermore, the spacer members 42 and 43 of the frame body 4 have relatively wide cutout portions 42B and 43B, respectively, on the opposite end surfaces of the V-shaped cutout surfaces 42A and 43A, as shown in the figure.
43B, frame fixing means 5 and 6 are disposed at this portion, and the frame body fixing means 5 and 6 are arranged to be attached to the tube to be measured 1 as described later. Furthermore, spacer members 42, 4
3 has protrusions 42C and 43C extending at right angles to the left and right at the upper end in FIG. As shown in FIG. 2, the frame body 4 can be easily attached to symmetrical positions, and the frame body 4 as a whole will not be bent. Numerals 44 and 45 indicate mounting screws, and numerals 42D and 43D indicate chain guide grooves.

Next, one frame body fixing means 5 includes a chain 50 as a cable member for fixing the frame body 4 to the tube to be measured 1, a tightening plate 51 that locks both ends of this chain 50, and a tightening plate 51 that locks both ends of this chain 50. A threaded portion 52 that moves the plate 51 upward in FIG. 3 and applies a predetermined tension (frame fixing force) to the chain 50;
a knob portion 53 for rotating 2 as necessary;
The pressing member 5 is fixed to the spacer member 42 side of the threaded portion 52 and presses the frame 4 toward the tube to be measured 1, and as shown in FIG. It is designed to be disposed in the cutout portion 42B of the. Therefore, since the chain 50 is disposed in the chain guide groove 42D of the spacer member 42 as shown in FIG. 1, the chain 50 can be wound at a relatively accurate right angle without shifting its fixation. It is becoming more and more like this.

Furthermore, since the tightening plate 51 moves up and down by turning the knob 53, it is possible to easily apply a fixed fixing force to the chain 50. Due to the action of
As shown in FIG.
can be uniformly fixed to the side of the tube 1 to be measured. Reference numeral 55 is the tightening plate 5
1 shows the rotation prevention member of No. 1.

The other frame fixing means 6 is also formed exactly the same as the one frame fixing means 5 described above. code 5
6 and 57 (see FIG. 4) indicate a key-shaped member for locking the chain. Therefore, the length of the chain 50 to be used can be freely set depending on the size of the tube 1 to be measured. Furthermore, the wide cutout portions 42B and 43B formed at the upper ends of the spacer members 42 and 43 in FIG. 1 may be circular counterbore grooves.

As shown in FIG.
It consists of a leaf spring member 80 that constantly presses B toward the tube to be measured 1 with a predetermined spring force, and a pressing force adjustment means 85 mounted on the lower surface of the center of the leaf spring member 80 in FIG. Of these, the pressing force adjusting means 85 is a pressing force that penetrates the screw plate 81 and the center part of the screw plate 82 to move the screw plate 81 in the vertical direction in the figure and apply a predetermined tension to the leaf spring member 80. A threaded portion 82, an operation knob 83 for rotating the pressing screw portion 82 as necessary, and an ultrasonic transmitter (or receiver) 7A fixed to the tip of the pressing screw portion 82 to connect the ultrasonic transmitter (or receiver) 7A to the tube to be measured. 1 side (see FIG. 1). The other transducer attachment means 9 is formed in exactly the same manner.

Among these, the plate spring member 80 is made of a stainless steel spring material and is bent into a trapezoidal shape as shown in FIG. , 41A, and the connecting portion 80C of this U-shaped locking portion 80A with the rising portion 80B in FIG. Because of this, a spring effect is generated at the connecting portion 80C.

Therefore, when the operating knob 83 is rotated clockwise, for example, the screw plate 81 moves upward and pushes up the center portion of the leaf spring member 80, and as a result, the leaf spring member 80 is moved by the reaction force of the screw plate 81. 81
Then, the pressing screw part 82 is pressed down in the figure, and as a result, one of the ultrasonic transmitters (or receivers) 7A constantly presses the side of the tube to be measured 1 via the disc-shaped pressing member 84. It is becoming more and more common.

Further, the threaded plate 81 of the transducer/receiver attachment means 8 has both side end portions bent slightly upward along the leaf spring member 80 (see Fig. 2), and this bent end portion 81A It is locked by a spring member 80 and its rotation is suppressed. In this case, the bent end portion 81A
In this case, both ends may be partially bent.

Furthermore, the disc-shaped pressing member 8 of the transducer attachment means 8
4 is a counterbore hole 70 formed in the upper end of one ultrasonic transmitter (or receiver) 7A in FIG.
It is designed to be located within the As a result, the ultrasonic transmitter (or receiver) 7A is always pressed uniformly from its center toward the center of the tube to be measured 1, and therefore always maintains the best measurement conditions. It has become possible to maintain it continuously for a long period of time. The other wave transmitting/receiving anchoring means 9 is formed in exactly the same manner. Reference numerals 78 and 79 indicate countersunk grooves formed in the transmitter (or receiver). This counterbore-shaped groove portion 78 or 79 and the disc-shaped pressing member 84 constitute a transducer/receiver locking mechanism.

As shown in FIG. 1, scale plates 4A and 5A are fixed to the upper surfaces of frame plates 40 and 41 of the frame body 4.
In addition, correspondingly, each transmitter (or receiver) 7A,
Vernier scales 4B and 5B are marked on the side of 8A, which indicates that each transmitter (or receiver)
7A and 8A can be positioned in 1/10 [mm] units.

In this case, each of the vernier scales 4B and 5B attached to the side surfaces of the transmitters (or receivers) 7A and 7B has a relatively long line, which makes it possible to The receivers (or receivers) 7A, 7B are designed to be able to sufficiently cope with ups and downs caused by the diameter of the tube 1 to be measured. 71A and 71B each indicate a coaxial cable for a transmitter (or receiver).

Incidentally, in the above embodiment, the counterbore groove portion 78 in which the transducer engaging mechanism is formed in the transducer 7A, 7B.
79 and the disk-shaped pressing member 84, other members may be used as long as they function equally well.

[Second Embodiment] Next, a second embodiment will be described based on FIG. 5.

In this embodiment, two sets of the above-mentioned frames 4 are provided and connected in a row via a spacer member 44, and one transmitter (or receiver) 7A is installed on one side of the frame 4. and another transmitter (or receiver) is fixed to the other side of the frame 4. For this reason, the frame body fixing means 5 described above
However, in this embodiment, as shown in the figure, a total of three locations are provided. The configuration and operation of other parts are the same as those of the conventional example described above.

Even in this case, in addition to functioning in the same manner as the first embodiment described above, there is an advantage that flow rate measurement can be performed efficiently especially for the large-diameter pipe 1 to be measured.

In each of the above embodiments, the case where the device is installed at the top of the tube to be measured is illustrated for convenience, but in reality, most of the devices are installed at the side of the tube to be measured 1 to prevent air bubbles and other negative effects. It's summery. The same applies to this embodiment.

[Effect of idea]

Since the present invention is constructed and functions as described above, for example, if the vernier is used as a normal vernier, 1/
It is extremely easy to align the transducers with each other in units of 10 [mm], making it possible to perform measurement tasks quickly and with high accuracy. The present invention provides an unprecedented practical ultrasonic transmitter/receiver for a flowmeter that can sufficiently cope with ups and downs during measurement of pipes with different diameters. can do.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing the first embodiment of the present invention, FIG. 2 is an explanatory view showing the function of the spacer member in the measured pipe portion of FIG. 1, and FIG. 3 is a front view of FIG. 1. 4 is a left side view of FIG. 3, and FIG. 5 is a front view showing the second embodiment. 1...Pipe to be measured, 4A, 5A...Scale plate, 4
B, 5B... Vernier, 7A, 7B... Transducer, 8
...Transducer/receiver attachment means, 40, 41...Frame plate, 4
2, 43... Spacer member, 50... Chain as a cable member, 80... Leaf spring member.

Claims (1)

[Claims for Utility Model Registration] A frame for mounting a transducer by two frame plates facing each other and a block-shaped spacer member fixedly attached between both ends of the two frame plates. and is equipped with an ultrasonic transducer for a flowmeter at two locations between the frame plates, and includes a transducer fastening means for press-locking the transducer with a leaf spring member. In an ultrasonic transmitting and receiving device for a flowmeter, the ultrasonic transmitting/receiving device for a flowmeter is equipped at a location where a transducer is attached to a frame body, and is equipped with a cable-like member such as a chain that wraps and fixes the frame body around a pipe to be measured using its spacer member. A scale plate is fixed to the outer end surface of one of the frame plates, and a vernier scale is attached to each of the transducers corresponding to the scale plate, and the scale line of the vernier scale is set to be relatively long. Ultrasonic transmitter/receiver for flowmeters.