JP2018077066A - Saddle type ultrasonic flow rate meter and flow rate measurement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saddle type ultrasonic flow rate meter which can be easily installed in an existing pipeline and can accurately measure a flow rate of a fluid to be measured, and a flow rate measurement method using the flow rate meter.SOLUTION: The saddle type ultrasonic flow rate meter includes: a support rod 20 that supports a flow rate detection unit 10 having flow rate detection means, and inserts or exposes the flow rate detection unit 10 in a pipeline from a hole provided on the pipeline; and a support rod fixing unit 50 that water-tightly fixes the support rod 20 to the pipeline. The support rod fixing unit 50 includes: a first saddle 51 that is disposed at a position of the hole of the pipeline; a tubular insertion portion 52 that extends from the first saddle 51 in the radial direction of the pipeline in a tubular shape and constitutes an insertion passage of the support rod 20 supporting the flow rate detection unit 10; and a second saddle 54 that is disposed on an outer surface of the pipeline opposite to the first saddle 51. The support rod fixing unit fixes the support rod 20 to the pipeline by fastening the first saddle 51 and the second saddle 54 with the pipeline sandwiched therebetween via a fixing member 60.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a saddle-type ultrasonic velocimeter that measures the flow velocity of a fluid to be measured using an ultrasonic transmitter and an ultrasonic receiver, and a flow velocity measuring method that measures a flow velocity using the same.

An ultrasonic anemometer that measures the flow velocity of a fluid such as tap water flowing in a pressure pipe such as a water pipe with an ultrasonic wave is equipped with an ultrasonic flow velocity detection means in a rectifier inserted in the pipe. There is.
As a prior art showing such an ultrasonic current meter, there is Patent Document 1 below.

Japanese Patent No. 5086704

The technique of the above-mentioned patent document 1 is an invention relating to an ultrasonic current meter developed by the inventor of the present application, and has an advantage that it is possible to easily and reliably detect mixing of bubbles and vibrations in addition to a pressure change due to leakage or the like.
However, the above-described conventional ultrasonic anemometer needs to be provided with a branch pipe in the pipeline, and has a structure that is attached (fixed) to the pipeline using a plurality of members such as a connection flange and a pedestal. There is a problem that it cannot be installed, and it is particularly difficult to newly install in an existing pipeline.
In addition, the conventional ultrasonic velocimeter is configured to receive the signal of the ultrasonic transmitter provided on the upper lateral rectifying plate by the ultrasonic receiver provided on the lower lateral rectifying plate. In the case where a lot of suspended matter is contained in the measurement fluid, there is a problem that the suspended matter adheres to the ultrasonic transmitter provided on the upper lateral rectifying plate and the flow velocity cannot be measured with high accuracy.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a saddle-type ultrasonic velocimeter that solves the above-described conventional problems and that can be easily installed, and particularly can be easily installed in an existing pipeline. It is another object of the present invention to provide a saddle type ultrasonic velocimeter that can accurately measure the flow velocity of a fluid to be measured. It is another object of the present invention to provide a flow velocity measurement method that can accurately measure the flow velocity of a fluid to be measured even for a pipe having a larger diameter.

In order to achieve the above object, a saddle type ultrasonic velocimeter of the present invention measures a flow velocity of a fluid to be measured in a pipe line by using a flow velocity detecting means including an ultrasonic transmitter and an ultrasonic receiver. An ultrasonic velocimeter for supporting a flow velocity detection unit including the flow velocity detection means, and a support rod for inserting or exposing the flow velocity detection unit into a pipeline from a hole provided in the pipeline, and the support rod And a support rod fixing portion for watertightly fixing the tube to the pipe, and the support rod fixing portion is disposed at the position of the hole of the pipe, and the radial direction of the pipe from the first saddle And a second saddle disposed on the outer surface of the pipe line facing the first saddle, and a cylindrical insertion portion that constitutes an insertion path of the support rod that extends in a cylindrical shape and supports the flow velocity detection portion. And sandwiching the first saddle and the second saddle via a fixing member By sintering, it is first characterized by securing the support rod to the conduit.
In addition to the first feature described above, the saddle type ultrasonic current meter of the present invention has a tubular insertion portion that extends from the first saddle in the radial direction of the pipe line and includes a gate valve chamber that includes a gate valve. And a flow velocity detection unit standby chamber that extends from the gate valve chamber in the radial direction of the pipe and constitutes a standby space of the flow velocity detection unit.
Further, in the saddle type ultrasonic current meter of the present invention, in addition to the first or second feature, the flow velocity detection unit includes a pair of vertical rectifying plates and a pair of vertical rectifying plates that connect the pair of upper and lower horizontal rectifying plates. A third feature is that an ultrasonic transmitter and an ultrasonic receiver are attached to a rectifier including a rectifying chamber composed of a rectifying plate.
In addition to the third feature described above, the saddle type ultrasonic velocimeter of the present invention has a fourth feature that the inner surface of the rectifying chamber is a rectangular flat surface having no irregularities.
In addition to the third feature, the saddle type ultrasonic current meter of the present invention has a fifth feature that the inner surface of the rectifying chamber has a bell mouth shape.
The saddle type ultrasonic velocimeter of the present invention includes an ultrasonic transmitter in each of the upper lateral rectifying plate and the lower lateral rectifying plate in addition to any one of the third to fifth features. Between the ultrasonic transmitter and the ultrasonic receiver provided in the upper lateral rectifier plate, with the lower horizontal rectifier plate interposed therebetween. The measurement signal is transmitted and received, and measurement is performed via the upper lateral rectifier between the lower ultrasonic transmitter / receiver composed of the ultrasonic transmitter and ultrasonic receiver provided in the lower lateral rectifier. The sixth feature is that signal transmission / reception is performed.
In addition to the sixth feature, the saddle-type ultrasonic velocimeter of the present invention includes a plurality of rectifier chambers, and each rectifier chamber includes an upper ultrasonic transmitter / receiver and a lower ultrasonic transmitter / receiver. The seventh feature is that at least one of them is provided.
Further, in the saddle type ultrasonic current meter of the present invention, in addition to the first or second feature, the flow velocity detector includes at least one of an ultrasonic transmitter and an ultrasonic receiver in a support rod. This is an eighth feature.
The saddle type ultrasonic velocimeter of the present invention includes, in addition to any one of the first to eighth features, an ultrasonic transmitter and an ultrasonic receiver that are detachable. It is said.
According to a tenth aspect of the present invention, there is provided a method for measuring a flow velocity of a fluid to be measured in a pipe by arranging a plurality of saddle type ultrasonic velocimeters according to claim 8 in the axial direction of the pipe. It is a feature.

  According to the saddle type ultrasonic velocimeter according to the first feature, the first saddle and the second saddle are fastened with the pipe interposed therebetween via the fixing member, and the support rod is fixed to the pipe. By doing so, it is possible to provide an ultrasonic current meter that is easy to install, and can be easily installed especially on an existing pipeline. Therefore, it is possible to provide an ultrasonic velocimeter capable of shortening the installation work and saving cost.

  Further, according to the saddle type ultrasonic velocimeter according to the second feature, in addition to the function and effect of the first feature, the tubular insertion portion includes a gate valve chamber and a flow velocity detection unit standby chamber. As a result, the flow velocity detection unit can be temporarily accommodated in the flow velocity detection unit standby chamber. Therefore, without removing the flow velocity detection unit from the saddle type ultrasonic velocimeter and without stopping the fluid to be measured in the pipeline, for example, between the ultrasonic transmitter and the ultrasonic receiver constituting the flow velocity detection unit Calibration can be performed. Furthermore, when exchanging the flow velocity detector, the flow velocity detector can be replaced while the water is reliably stopped by the gate valve provided in the gate valve chamber. Therefore, it can be set as the ultrasonic current meter excellent in workability | operativity.

  Further, according to the saddle type ultrasonic velocimeter according to the third feature, in addition to the operational effect of the first or second feature, the ultrasonic transmitter and the ultrasonic receiver are mounted on the rectifier. Thus, it is possible to effectively prevent a turbulent flow at the time of measurement and to obtain an ultrasonic velocimeter capable of accurately measuring the flow velocity of the fluid to be measured.

  Moreover, according to the binding tool by the said 4th characteristic, in addition to the effect by the said 3rd characteristic, by making the inner surface of a rectification | straightening chamber into a rectangular-shaped flat surface without an unevenness | corrugation, the fluid to be measured is When passing through the rectifier, it is possible to prevent further turbulence from occurring. Therefore, an ultrasonic current meter that can measure the flow velocity of the fluid to be measured with higher accuracy can be obtained.

  Further, according to the saddle type ultrasonic velocimeter according to the fifth feature, in addition to the function and effect by the third feature, the inner surface of the rectifying chamber is formed in a bell mouth shape, so that the rectifier has a much higher rectifier effect. be able to. Therefore, an ultrasonic current meter that can measure the flow velocity of the fluid to be measured with higher accuracy can be obtained.

  Further, according to the saddle type ultrasonic velocimeter according to the sixth feature, in addition to the operational effect of any one of the third to fifth features, an upper lateral rectifying plate, a lower lateral rectifying plate, In each of the above, an ultrasonic transmitter and an ultrasonic receiver are provided with at least a pair, and between the upper ultrasonic transmitter / receiver configured by an ultrasonic transmitter and an ultrasonic receiver provided in the upper lateral rectifying plate, The measurement signal is transmitted / received via the lower lateral rectifier plate, and the upper ultrasonic transmitter / receiver composed of the ultrasonic transmitter / receiver provided in the lower lateral rectifier plate If the measurement fluid contains a lot of suspended solids, for example, the operation between the upper ultrasonic transmitter / receiver is stopped and the lower super By operating only the operation between the acoustic wave transmitter and receiver, the flow velocity of the fluid to be measured can be accurately adjusted. It is possible to improve measurement. On the other hand, when a large amount of sediment is contained in the fluid to be measured, for example, the operation between the lower ultrasonic transducers is stopped and the operation between the upper ultrasonic transducers is activated to The flow velocity can be measured with high accuracy. That is, the ultrasonic transceiver to be operated can be changed as appropriate in accordance with the measurement environment. Therefore, it can be set as the ultrasonic flowmeter which can measure the flow velocity of the fluid to be measured continuously. Moreover, it can be set as the ultrasonic flowmeter which can measure the flow velocity of the fluid to be measured with high accuracy.

  According to the saddle type ultrasonic velocimeter according to the seventh feature, in addition to the function and effect of the sixth feature, at least one of the upper ultrasonic transceiver and the lower ultrasonic transceiver is provided in the plurality of rectifying chambers. By adopting such a configuration, the measurement range of the fluid to be measured can be effectively increased, and an ultrasonic velocimeter that can measure the flow velocity of the fluid to be measured more accurately can be obtained.

  According to the saddle type ultrasonic velocimeter according to the eighth feature, in addition to the operational effect according to the first or second feature, the flow velocity detector includes at least one of an ultrasonic transmitter and an ultrasonic receiver. By adopting a configuration in which either one is built in the support rod, it is possible to effectively prevent the flow velocity detector from being affected by the flow of the fluid to be measured. Therefore, it can be set as the ultrasonic velocimeter which can measure more accurately.

  Further, according to the saddle type ultrasonic velocimeter according to the ninth feature, in addition to the function and effect of any one of the first to eighth features, the ultrasonic transmitter and the ultrasonic receiver can be freely attached and detached. By preparing for, it can be set as the ultrasonic flowmeter which can replace | exchange an ultrasonic transmitter and an ultrasonic receiver easily. Therefore, manufacturing efficiency and convenience of maintenance can be improved.

  According to the flow velocity measuring method according to the tenth feature, a plurality of saddle type ultrasonic velocimeters according to claim 8 are arranged in the axial direction of the pipeline to measure the flow velocity of the fluid to be measured in the pipeline. Therefore, it is possible to provide a flow velocity measurement method that can accurately measure the flow velocity of the fluid to be measured even for a pipe line having a large diameter.

According to the ultrasonic anemometer of the present invention, it is possible to provide an ultrasonic anemometer that can be easily installed, and can be easily installed especially on an existing pipe line. Therefore, it is possible to provide an ultrasonic velocimeter capable of shortening the installation work and saving cost. Moreover, it can be set as the ultrasonic velocity meter which can measure the flow velocity of the fluid to be measured with high accuracy.
Moreover, according to the flow velocity measuring method of the present invention, it is possible to provide a flow velocity measuring method capable of accurately measuring the flow velocity of the fluid to be measured even for a pipe having a large diameter.

It is a partially broken front view which shows the state which installed the saddle type ultrasonic current meter which concerns on the 1st Embodiment of this invention in the pipe line. It is a figure which shows the saddle type ultrasonic current meter which concerns on the 1st Embodiment of this invention, and is sectional drawing in the AA line direction of FIG. 1 is an exploded view of a saddle type ultrasonic current meter according to a first embodiment of the present invention. It is sectional drawing of the rectifier which comprises the saddle type ultrasonic current meter which concerns on the 1st Embodiment of this invention. It is a front view which shows the state which accommodated the flow velocity detection part in the flow velocity detection part standby room in the state which installed the saddle type ultrasonic current meter which concerns on the 1st Embodiment of this invention in the pipe line. It is a block diagram which shows the system configuration | structure of the saddle type ultrasonic velocity meter which concerns on the 1st Embodiment of this invention. It is a figure which shows the modification 1 of the rectifier which comprises the saddle type ultrasonic current meter which concerns on the 1st Embodiment of this invention. It is a figure which shows the modification 2 of the rectifier which comprises the saddle type ultrasonic current meter which concerns on 1st Embodiment of this invention. It is a figure which shows the modification 3 of the rectifier which comprises the saddle type ultrasonic current meter which concerns on the 1st Embodiment of this invention, (a) is sectional drawing, (b) is a side view. It is a figure which shows the saddle type ultrasonic velocity meter which concerns on the 2nd Embodiment of this invention, (a) is a figure which shows the principal part of a support bar, (b) is the saddle which concerns on the 2nd Embodiment of this invention. It is a front view which shows the state which installed the type | mold ultrasonic current meter in the pipe line. It is a front view which shows the state which installed the saddle type ultrasonic current meter which concerns on the 3rd Embodiment of this invention in the pipe line.

  Hereinafter, a saddle type ultrasonic current meter according to an embodiment of the present invention will be described with reference to the drawings for understanding of the present invention. However, the following description does not limit the present invention described in the claims.

  First, with reference to FIGS. 1-6, the saddle type ultrasonic velocity meter 1 which concerns on the 1st Embodiment of this invention is demonstrated.

  The saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention measures the flow velocity of a fluid to be measured that flows in a pipeline using an ultrasonic transmitter and an ultrasonic receiver. More specifically, the saddle type ultrasonic current meter 1 according to the first embodiment of the present invention is a so-called insertion type ultrasonic current meter that is used by being inserted into a water pipe 2 that is a pressure line. .

  The saddle type ultrasonic velocimeter 1 includes a flow velocity detection unit 10, a support bar 20, an adjustment handle 30, a cable 40, a support bar fixing unit 50, a fixing member 60, and a measuring unit 70. The

The flow velocity detection unit 10 constitutes a flow velocity detection means including an ultrasonic transmitter and an ultrasonic receiver.
In this embodiment, the flow rate detector 10 is configured to use a rectifier 10a in which an ultrasonic transmitter and an ultrasonic receiver are mounted.

As shown in FIG. 4, the rectifier 10a is connected to a pair of upper and lower horizontal rectifying plates 11a and 11b arranged substantially in parallel with a predetermined interval in the vertical direction, and the pair of horizontal rectifying plates 11a and 11b. And a pair of longitudinal rectifying plates 12a and 12b. And the rectification | straightening chamber 13 which rectifies | straightens tap water with the inner surface of the horizontal rectifier plates 11a and 11b and the inner surface of the vertical rectifier plates 12a and 12b is formed. The horizontal rectifying plates 11a and 11b and the vertical rectifying plates 12a and 12b are arranged substantially parallel to the flow direction of tap water in the water pipe 2.
In FIG. 4, for convenience of explanation, the lateral rectifying plate 11 a is illustrated as being thicker than the actual thickness.

  The pair of horizontal rectifying plates 11a and 11b and the pair of vertical rectifying plates 12a and 12b are formed of flat plate members. Thereby, the inner surface of the rectifying chamber 13 is a rectangular flat surface having no irregularities.

In the present embodiment, as shown in FIG. 4, a pair of ultrasonic transceivers 14a and 14b is provided inside the upper lateral rectifying plate 11a.
More specifically, as shown in FIG. 4, the ultrasonic transceivers 14a and 14b are arranged in the cavity E provided in the upper lateral rectifying plate 11a. More specifically, the ultrasonic transmitter / receivers 14a and 14b are fitted and fixed in the ultrasonic transmitter / receiver fitting recess E1 provided in the cavity E, which is a space for fitting the ultrasonic transmitter / receiver. As a configuration.
In addition, in a state where the ultrasonic transmitter / receiver is fitted in the ultrasonic transmitter / receiver fitting recess E1, the ultrasonic transmitter / receiver is fitted without wobbling, but FIG. 4 and FIG. 7 to FIG. For convenience of explanation, a gap is provided between the ultrasonic transceiver fitting recess E1 and the ultrasonic transceiver for illustration.
The ultrasonic transmitters / receivers 14a and 14b are connected to the connection wiring H and the connector K, and the connector K is connected to a connector (not shown) provided in the connection unit 21 to transmit / receive measurement signals.
In the present embodiment, a configuration in which two functions of an ultrasonic transmitter and an ultrasonic receiver are provided in one ultrasonic element is not necessarily limited to such a configuration. It is good also as a structure which equips an element with the function of an ultrasonic transmitter and an ultrasonic receiver separately.

Further, a screw portion (not shown) is provided on the upper surface of the upper lateral rectifying plate 11a, and this screw portion is provided on a connection portion 21 attached to the lower end of the support bar 20 (not shown). ) Is detachably screwed. Thus, the rectifier 10a is detachably attached to the support rod 20.
Further, although not shown, in the present embodiment, the horizontal rectifying plates 11a and 11b and the vertical rectifying plates 12a and 12b are detachably connected.
In the saddle type ultrasonic velocimeter 1 of the present embodiment having such a configuration, the ultrasonic transceiver is detachable along with the attachment / detachment of the horizontal rectifying plate 11a.
That is, in the present embodiment, the detachable ultrasonic transmitter / receiver unit U is configured by the lateral rectifying plate 11a, the ultrasonic transmitter / receivers 14a and 14b, the connection wiring H, and the connector K.
The configuration in which the ultrasonic transmitter / receiver is detachable is not limited to the above-described configuration, and the ultrasonic transmitter / receiver may be detachable by detaching the rectifier 10a itself from the support bar 20. .

  The configuration in which the rectifier 10a is detachably attached to the support rod 20 is not limited to the configuration of the present embodiment, and any configuration may be used as long as the rectifier 10a can be detachably attached to the support rod 20. .

Further, when one of the pair of ultrasonic transceivers 14a and 14b serves as an ultrasonic transmitter, the other serves as an ultrasonic receiver. Specifically, when transmitting a measurement signal in the forward direction with the flow of tap water, the ultrasonic transmitter / receiver 14a is on the transmitting side, and the ultrasonic transmitter / receiver 14b is on the receiving side. On the other hand, when transmitting a measurement signal in the direction opposite to the flow of tap water, the ultrasonic transceiver 14b is on the transmission side, and the ultrasonic transceiver 14a is on the reception side.
Further, as shown in FIG. 4, the ultrasonic transmitter / receiver 14a and the ultrasonic transmitter / receiver 14b transmit the signal via the rectifying surface S2 of the lower lateral rectifying plate 11b (by reflecting the measurement signal on the rectifying surface 13b). Send and receive.

  Furthermore, as shown in FIG. 4, the ultrasonic transmitters 14 a and 14 b are arranged in the cavity E with an angle at which measurement signals can be transmitted and received in an oblique direction with respect to the flow of tap water.

As shown in FIGS. 1 and 2, the support bar 20 supports the flow rate detection unit 10 (rectifier 10 a) and pipes the flow rate detection unit 10 supported by the support bar 20 from the hole 2 a provided in the water pipe 2. It is for insertion or exposure in the road.
As shown in a simplified manner in FIGS. 1 and 2, a rectifier 10 a is provided at one end of the support bar 20, and an adjustment handle 30 for moving the support bar 20 up and down is provided at the other end.
Although not shown in the figure, wiring connected to the cable 40 is disposed inside the support bar 20 and inside the adjustment handle 30. The cable 40 is connected to a measurement unit 70 described later, and transmits and receives measurement signals between the ultrasonic transceivers 14a and 14b and the measurement unit 70.
Although not shown, the support bar 20 is formed of a cylindrical body having an elliptical horizontal cross section. More specifically, the horizontal section whose longitudinal direction is the same as the direction of the flow of tap water is an elliptical cylindrical body.
Such a support rod 20 is watertightly fixed to the water pipe 2 via the support rod fixing portion 50.

The adjustment handle 30 serves as a so-called grip for moving the support bar 20 up and down.
In the present embodiment, the adjustment handle 30 is formed of an elongated cylindrical member. Of course, the adjustment handle 30 is not limited to that of the present embodiment, and can be changed as appropriate.

  The cable 40 is a so-called electric wire for transmitting and receiving measurement signals between the ultrasonic transceivers 14 a and 14 b and the measurement unit 70.

  The support bar fixing part 50 is for fixing the support bar 20 to the water pipe 2 in a watertight manner. In the present embodiment, the support rod fixing portion 50 includes a first saddle 51, a cylindrical insertion portion 52, a sealing portion 53, and a second saddle 54.

The first saddle 51 is a saddle that is disposed at a position of a hole 2 a provided in the water pipe 2 and is fastened to the second saddle 54 via a fixing member 60.
As shown in FIG. 2, the first saddle 51 is provided with a hole 51 a through which the support rod 20 including the flow velocity detection unit 10 is inserted. And the 1st saddle 51 is arrange | positioned on the outer surface of the water pipe 2 so that the hole 51a and the hole 2a of the water pipe 2 may overlap.
As shown in FIGS. 2 and 3, a sealing rubber 55 for sealing water is disposed between the water pipe 2 and the first saddle 51.
Further, as shown in FIGS. 1 and 2, in the present embodiment, the first saddle 51 and the second saddle 52 are formed using four bolts 61 constituting the fixing member 60 and eight nuts 62. Is configured to be fastened with the water pipe 2 interposed therebetween. Of course, it is not restricted to such a structure, The number and arrangement position of the volt | bolt 61 and the nut 62 can be suitably changed according to the magnitude | size and shape of a saddle or a pipe line.

The cylindrical insertion portion 52 is configured to form an insertion path of the support rod 20 that extends from the first saddle 51 in the radial direction of the water pipe 2 and supports the flow velocity detection unit 10.
As shown in FIGS. 1 and 2, the cylindrical insertion portion 52 includes a connection chamber 52 a, a gate valve chamber 52 b, and a flow velocity detection unit standby chamber 52 c.

  The connecting chamber 52a extends from the first saddle 51 in the radial upper direction of the water pipe 2, connects the first saddle 51 and the gate valve chamber 52b, and connects the flow rate detector 10 (rectifier 10a). This is to constitute an insertion space through which the supporting rod 20 to be supported is inserted.

  The gate valve chamber 52b extends from the connection chamber 52a in the radial direction of the water pipe 2, and constitutes an insertion space through which the support rod 20 including the flow velocity detection unit 10 (rectifier 10a) is inserted. . In addition, a gate valve (not shown) that can be opened / closed by the opening / closing valve B is provided to constitute a space for switching between a water supply state and a water stop state of tap water flowing out from the holes 2a and 51a. is there.

The flow velocity detection unit standby chamber 52c extends from the gate valve chamber 52b in the radial direction of the water pipe 2, and constitutes an insertion space through which the support rod 20 that supports the flow velocity detection unit 10 (rectifier 10a) is inserted. This is to constitute a primary standby space of the flow velocity detector 10 (rectifier 10a).
More specifically, as shown in FIG. 5, for example, when calibration of the ultrasonic transceivers 14 a and 14 b is necessary, the flow rate detection supported at the tip of the support bar 20 using the adjustment handle 30. The part 10 (rectifier 10a) is raised. Then, the ultrasonic transducers 14a and 14b are calibrated in a state where the flow velocity detector 10 (rectifier 10a) is temporarily accommodated in the flow velocity detector standby chamber 52c.
In addition, as shown in FIG. 1, the plug P which can connect another electric equipment etc. is provided in the outer surface of the flow velocity detection part standby chamber 52c.

The sealing portion 53 is for fixing the support rod 20 that supports the flow velocity detection unit 10 (rectifier 10a) to the cylindrical insertion portion 52 in a watertight manner. Although not shown, the sealing portion 51 includes a sealing water seal and a fixing mechanism for fixing the insertion length of the support rod 20 into the cylindrical insertion portion 52.
As shown in FIGS. 1 and 2, the sealing portion 53 is fixed to the cylindrical insertion portion 52 using a bolt 53a and a nut 53b.
The first saddle 51, the cylindrical insertion portion 52, and the sealing portion 53 described above can be formed by integral molding using, for example, cast iron.

  The second saddle 54 is a saddle that is disposed on the outer surface of the water pipe 2 facing the first saddle 51 and is fastened to the first saddle 51 via a fixing member 60.

The fixing member 60 is a member for fastening the first saddle 51 and the second saddle 54 with the water pipe 2 interposed therebetween.
In the present embodiment, as described above, the fixing member 60 includes the four bolts 61 and the eight nuts 62.

  The measurement unit 70 is a unit that performs measurement processing of the flow velocity of the fluid to be measured. As shown in FIG. 6, the measurement unit 70 includes a transmission / reception control unit 71, a flow rate calculation unit 72, a flow rate calculation unit 73, an abnormal value determination unit 74, a measurement control unit 75, a storage unit 76, and a display unit. 77. The measurement unit 70 is configured by a computer (not shown).

  The transmission / reception control unit 71 is for performing transmission processing and reception processing of ultrasonic waves from the ultrasonic transmitter / receivers 14a and 14b. For example, the transmission-side ultrasonic transmitter / receiver is intermittently transmitted at predetermined time intervals. A sound wave is transmitted, and the reception signal of the reflected wave received by the ultrasonic transmitter / receiver on the receiving side is sent to the subsequent stage.

The flow rate calculation unit 72 calculates the flow rate V of tap water. In this embodiment, the transmission side ultrasonic transmitter / receiver transmits ultrasonic waves in the forward direction with the flow of tap water, and the reception time until the reception side ultrasonic transmitter / receiver receives the ultrasonic waves, The flow velocity V1, V2 is calculated based on the difference from the arrival in the opposite direction, and the average value (V1 + V2 / 2) of both the flow velocity V1, V2 is calculated to calculate the flow velocity V of the tap water at that time. The configuration is a so-called time difference method.
When there is no tap water flow, the arrival times of the two ultrasonic signals in the forward direction and the reverse direction with respect to the tap water flow are the same, but the forward direction (white arrow in FIG. 1) Direction), a difference proportional to the flow rate occurs in the arrival time of the two ultrasonic signals, and the flow rate of tap water is calculated from the difference in arrival time.

  The flow rate calculation unit 73 calculates and integrates the flow rate from the flow velocity V and the cross-sectional area of the water pipe 1.

The abnormal value determination unit 74 determines whether or not the measured flow velocity value is an abnormal value. Specifically, the value of the measured flow velocity is compared with the past measurement value stored in the storage unit 76, and if a difference between the predetermined value or the predetermined value occurs, the measurement value is abnormal. It is determined as a value.
When the measured flow velocity value is determined as an abnormal value by the abnormal value determination unit 74, the measurement control unit 75 stops the flow velocity measurement for a certain period of time, and calculates the flow velocity value and flow rate calculation of the flow velocity calculation unit 72. The flow rate value of the unit 73 is fixed at the measured value before the stop. And the measurement control part 75 restarts the measurement of the flow velocity after progress for a fixed time.
If the abnormal value is not resolved, a failure or the like is assumed, and thus a signal indicating an abnormality is output to the display unit 77.

  As described above, the measurement control unit 75 is for controlling measurement by the ultrasonic transceivers 14a and 14b and stopping of the measurement.

  The said storage part 76 memorize | stores each data of the flow velocity calculating part 72, the flow volume calculating part 73, and the abnormal value determination part 74 separately.

  The display unit 77 displays the data calculated by the flow rate calculation unit 72 and the flow rate calculation unit 73 and the data stored in the storage unit 76 as necessary.

Next, a method for fixing the saddle type ultrasonic current meter 1 having such a configuration to the water pipe 2 will be described. With reference to FIGS. 1 and 2, first, the first saddle 51 and the second saddle 54 having the support rod fixing portion 50 are fixed to a predetermined position of the water pipe 2 via the fixing member 60. Thereafter, a drilling machine (not shown) for providing a hole in the water pipe 2 is attached to the support bar fixing portion 50. And the hole 2a is made in the water pipe 2 using a punch. Then, after stopping water using a gate valve (not shown), a punching machine is removed and the support bar 20 provided with the flow velocity detection part 10 is attached to the support bar fixing | fixed part 50. FIG. And after making it a water flow state using a gate valve (not shown), the insertion length of the flow velocity detection part 10 with respect to the cylindrical insertion part 52 is adjusted, and the support rod 20 is fixed to a sealing part.
As described above, the saddle type ultrasonic current meter 1 is attached to the water pipe 2.

  The saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention configured as described above has the following effects.

  A structure in which the first saddle 51 and the second saddle 54 are fastened with the water pipe 2 interposed therebetween, and the support rod 20 that supports the flow velocity detection unit 10 including the ultrasonic transceivers 14 a and 14 b is fixed to the water pipe 2. By doing so, it is possible to provide an ultrasonic current meter that is easy to install, and can be easily installed especially on an existing pipeline. Therefore, it is possible to realize an ultrasonic velocimeter capable of improving the efficiency and shortening of the installation work and reducing the cost. Thus, the effect that it can be easily installed in an existing pipe line is an important and unique effect of the saddle type ultrasonic current meter 1 of the present invention, which is not found in the prior art.

In addition, since the cylindrical insertion portion 52 includes the gate valve chamber 52b and the flow velocity detection unit standby chamber 52c, for example, the ultrasonic transmitters 14a and 14b constituting the flow velocity detection unit 10 need to be calibrated. In this case, the flow velocity detector 10 can be temporarily accommodated in the flow velocity detector standby chamber 52c. Therefore, the ultrasonic transmitters 14a and 14b constituting the flow velocity detection unit 10 can be calibrated without removing the flow velocity detection unit 10 and without stopping the fluid to be measured in the water pipe 2. Furthermore, when exchanging the flow velocity detection unit 10, the exchange operation of the flow velocity detection unit 10 can be performed in a state where water is reliably stopped by the gate valve provided in the gate valve chamber 52b. Therefore, it can be set as the ultrasonic current meter excellent in workability | operativity.
Thus, the point that the space for temporarily waiting for the flow velocity detection unit 10 is provided is an important and unique configuration of the saddle type ultrasonic current meter 1 of the present invention, which was not found in the prior art.

In addition, by adopting a configuration in which the ultrasonic transceivers 14a and 14b are attached to the rectifier 10a, an turbulent flow during measurement can be effectively prevented, and an ultrasonic velocimeter capable of accurately measuring the flow velocity of the fluid to be measured is provided. be able to.
Furthermore, by making the inner surface of the clear flow chamber 13 a rectangular and flat surface without unevenness, it is possible to prevent further turbulence from occurring when the fluid to be measured passes through the rectifier 10a. Therefore, it can be set as the ultrasonic velocity meter which can measure the flow velocity of the fluid to be measured with higher accuracy.

  Further, by providing the ultrasonic transceivers 14a and 14b in the detachable ultrasonic transceiver unit U, the ultrasonic transceiver can be easily replaced and maintained. The convenience of management can be improved.

  Moreover, the resistance by the shape of the support bar 20 which is also an obstacle in a flow path is effectively reduced by making the structure of the support bar 20 into a cylindrical body having an elliptical cross section in the horizontal direction. Can do. Therefore, the fluctuation of the support rod 20 due to the flow of tap water can be effectively suppressed, the fluctuation of the rectifier 10a can be reduced, and the stability to measurement and the durability of the ultrasonic current meter can be effectively improved. it can.

  Further, by providing the abnormal value determination unit 74, an ultrasonic current meter that can measure the flow velocity of the fluid to be measured with higher accuracy can be obtained.

  Next, modified examples 1 to 3 of the saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention will be described with reference to FIGS.

First, referring to FIG. 7, in the first modification, the configuration of the flow velocity detecting means (rectifier) is modified with respect to the saddle type ultrasonic velocity meter 1 according to the first embodiment of the present invention described above. Is. Other configurations are the same as the saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention described above, so that the same member and the same function are given the same number and the same reference numeral, Detailed description will be omitted below.
In FIG. 7, for convenience of explanation, the lateral rectifying plates 11a and 11b are illustrated as being thicker than the actual thickness.

Referring to FIG. 7, in the first modification, each of the lateral rectifying plates 11a and 11b constituting the rectifier 10a is provided with a pair of ultrasonic transceivers.
More specifically, the pair of ultrasonic transceivers 14c and 14d is provided on the lateral rectifying plate 11a provided on the upper side, and the pair of ultrasonic transceivers 14e and 14f is provided on the lateral rectifying plate 11b provided on the lower side. It is.
In other words, the pair of ultrasonic transmitters / receivers 14c and 14d provided on the upper lateral rectifying plate 11a constitutes the upper ultrasonic transmitter / receiver, and the pair of ultrasonic transmitter / receivers 14e and 14f provided on the lower lateral rectifying plate 11b. A side ultrasonic transmitter-receiver is comprised.

  In this way, one rectifying chamber 13 is provided with a pair of upper and lower ultrasonic transceivers and a pair of ultrasonic transceivers (one pair on each of the upper and lower sides of one rectifying chamber 13). If the fluid to be measured contains a large amount of suspended matter, for example, the operation of the upper ultrasonic transmitter / receiver is stopped and only the lower ultrasonic transmitter / receiver is used. By operating, the flow velocity of the fluid to be measured can be accurately measured. On the other hand, when a large amount of sediment is contained in the fluid to be measured, for example, the operation of the lower ultrasonic transmitter / receiver is stopped and only the upper ultrasonic transmitter / receiver is operated so that the flow velocity of the fluid to be measured can be accurately determined. It can be measured. That is, the ultrasonic transceiver to be operated can be changed as appropriate in accordance with the measurement environment. Therefore, it can be set as the ultrasonic flowmeter which can measure the flow velocity of the fluid to be measured continuously. Moreover, it can be set as the ultrasonic flowmeter which can measure the flow velocity of the fluid to be measured with high accuracy.

Next, with reference to FIG. 8, the modification 2 of the saddle type ultrasonic current meter 1 which concerns on embodiment of this invention is demonstrated.
In the second modification, the configuration of the flow velocity detecting means (rectifier) is modified with respect to the saddle type ultrasonic velocity meter 1 according to the first embodiment of the present invention described above. Other configurations are the same as the saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention described above, so that the same member and the same function are given the same number and the same reference numeral, Detailed description will be omitted below.
In FIG. 8, for convenience of explanation, the lateral rectifying plates 11a, 11d, and 11e are illustrated as being thicker than the actual thickness.

  Referring to FIG. 8, in the second modification, a plurality of rectifying chambers are provided in multiple stages in the rectifier 10a, and an ultrasonic transceiver is provided in each rectifying chamber.

  Specifically, referring to FIG. 8, the three rectifying chambers of the first rectifying chamber 13a, the second rectifying chamber 13b, and the third rectifying chamber 13c are arranged in the vertical direction. is there.

More specifically, the upper lateral rectifying plate 11a and the lower lateral rectifying plate 11b constitute the first rectifying chamber 13a. In the first rectifying chamber 13a, a pair of ultrasonic transceivers 14g and 14h are attached only to the upper lateral rectifying plate 11a. That is, one upper ultrasonic transceiver is provided in the first rectifying chamber 13a.
In addition, a second rectifying chamber 13b is configured by the upper lateral rectifying plate 11c and the lower lateral rectifying plate 11d at the lower stage of the first rectifying chamber 13a. Note that the lower rectifying plate 11b constituting the first rectifying chamber 13a and the upper rectifying plate 11c constituting the second rectifying chamber 13b are configured to be shared by the same member.
In the second rectifying chamber 13b, a pair of ultrasonic transceivers 14i and 14j is attached only to the lower lateral rectifying plate 11d. That is, the lower rectifying chamber 13b is provided with one lower transceiver.
Further, a third rectifying chamber 13c is constituted by the upper lateral rectifying plate 11e and the lower lateral rectifying plate 11f at the lower stage of the second rectifying chamber 13b. In the third rectifying chamber 13c, a pair of ultrasonic transceivers 14k and 14m is attached only to the upper rectifying plate 11e. That is, one upper transceiver is provided in the third rectifying chamber 13c.
Further, a connection plate 21 having a connector (not shown) is provided between the second rectifying chamber 13b and the third rectifying chamber 13c.

  As described above, the flow velocity detector 10 (rectifier 10a) is provided with a plurality of rectification chambers in multiple stages, and each rectification chamber is provided with at least one of an upper ultrasonic transmitter / receiver and a lower ultrasonic transmitter / receiver. Thereby, the measurement range of the flow rate of tap water can be effectively increased, and an ultrasonic anemometer capable of measuring the flow rate of tap water with higher accuracy can be obtained.

Next, with reference to FIG. 9, the modification 3 of the saddle type ultrasonic current meter 1 which concerns on embodiment of this invention is demonstrated.
In the third modification, the configuration of the flow velocity detecting means (rectifier) is modified with respect to the saddle type ultrasonic velocity meter 1 according to the first embodiment of the present invention described above. Other configurations are the same as the saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention described above, so that the same member and the same function are given the same number and the same reference numeral, Detailed description will be omitted below.

  Referring to FIG. 9, in the third modification, the shape of the inner surface of the rectifying chamber 13 of the rectifier 10a is a bell mouth shape.

  By setting it as such a structure, it can be set as the rectifier with the higher rectification effect. Therefore, an ultrasonic current meter that can measure the flow velocity of the fluid to be measured with higher accuracy can be obtained.

  Next, referring to FIG. 10, a saddle type ultrasonic current meter 3 according to the second embodiment of the present invention and a method for measuring the flow rate of tap water in the water pipe 2 using the saddle type ultrasonic current meter 3 will be described. explain.

  The saddle type ultrasonic current meter 3 according to the second embodiment of the present invention is different from the above-described saddle type ultrasonic current meter 1 according to the first embodiment of the present invention in the configuration of the flow velocity detection unit. It is a configuration. Other configurations are the same as the saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention described above, so that the same member and the same function are given the same number and the same reference numeral, Detailed description will be omitted below.

Referring to FIG. 10, in the saddle type ultrasonic velocimeter 3 according to the second embodiment of the present invention, an ultrasonic transceiver incorporated in the support rod 20 is used as the flow velocity detecting means.
Specifically, the fitting recess 20a is formed at the tip of the support bar 20, and the ultrasonic transceiver 14r (14s, 14t, 14u) is detachably provided in the fitting recess 20a.
More specifically, the ultrasonic wave is generated by the frame 15 having the cavity E, the ultrasonic transmitter / receiver 14r (14s, 14t, 14u) disposed inside the frame 15, the connection wiring H, and the connector K. A transceiver unit U is formed, and the ultrasonic transceiver unit U is detachably screwed into the fitting recess 20a via a threaded portion (not shown).
In addition, in a state where the ultrasonic transceiver unit U is attached to the support rod 20, the end surface 20b at the tip of the support rod 20 and the end surface U1 of the ultrasonic transceiver unit U are flush with each other. In addition, the support bar 20 is fixed to the water pipe 2 so that the end face 20b and the end face U1 and the inner surface 2b of the water pipe 2 are flush with each other. That is, the ultrasonic transceiver unit U is exposed flush with the inner surface 2 b of the water pipe 2.

Then, a plurality of saddle type ultrasonic velocimeters 3 having such a configuration are arranged at intervals in the axial direction of the water pipe 2 to measure the flow speed of the tap water.
Specifically, referring to FIG. 10 (b), the three saddle-type ultrasonic velocimeters 3 are located at positions where the adjacent saddle-type ultrasonic velocimeters 3 are symmetrical with respect to the central axis of the water pipe 2 with a certain interval therebetween. Sonic current meters 3a, 3b, 3c are arranged.
As shown in FIG. 10B, the saddle type ultrasonic current meter 3a is provided with one ultrasonic transmitter / receiver 14r, and the saddle type ultrasonic current meter 3b is provided with two ultrasonic transmitters / receivers 14s and 14t. The saddle type ultrasonic current meter 3b is provided with one ultrasonic transmitter / receiver 14u.
Then, measurement signals are transmitted and received between the ultrasonic transceiver 14r and the ultrasonic transceiver 14s. In addition, measurement signals are transmitted and received between the ultrasonic transmitter / receiver 14t and the ultrasonic transmitter / receiver 14u.

Thus, by setting it as the structure which incorporates an ultrasonic transmitter-receiver in the support bar 20, it can prevent effectively that the flow-velocity detection part receives the influence of the flow of tap water. Therefore, it can be set as the ultrasonic velocimeter which can measure more accurately. Furthermore, the flow velocity detection unit is influenced by the flow of tap water by adopting a configuration in which the support bar 20 is fixed to the water pipe 2 so that the end face 20b and the end face U1 and the inner surface 2b of the water pipe 2 are flush with each other. Can be more effectively prevented. Therefore, it can be set as the ultrasonic velocimeter which can measure more accurately.
Even if the pipe diameter of the water pipe 2 is large, a configuration in which a plurality of saddle type ultrasonic velocimeters 3 are arranged in the axial direction of the water pipe 2 to measure the flow speed of the tap water. The average flow rate of tap water at a plurality of points can be easily measured. Therefore, even when the pipe diameter of the water pipe 2 is large, it is possible to provide a flow velocity measuring method that can measure the flow speed of tap water with high accuracy.

  Next, with reference to FIG. 11, a saddle type ultrasonic current meter 4 according to a third embodiment of the present invention and a flow rate measuring method for a fluid to be measured that is performed using the saddle type ultrasonic current meter 4 will be described.

  The saddle type ultrasonic current meter 4 according to the third embodiment of the present invention is different from the above-described saddle type ultrasonic current meter 1 according to the first embodiment of the present invention in the configuration of the flow velocity detection unit. It is a configuration. Other configurations are the same as the saddle type ultrasonic velocimeter 1 according to the first embodiment of the present invention described above, so that the same member and the same function are given the same number and the same reference numeral, Detailed description will be omitted below.

Referring to FIG. 11, in the saddle type ultrasonic velocimeter 4 according to the third embodiment of the present invention, an ultrasonic transceiver incorporated in the support rod 20 is used as the flow velocity detecting means.
Specifically, referring to FIG. 11, one ultrasonic transmitter / receiver 1414v is detachably incorporated in the distal end side of one support bar 20, and at a predetermined interval from the ultrasonic transmitter / receiver 14v, One ultrasonic transmission / reception 14w is built in the support rod 20 in a detachable manner. In other words, the support rod 20 is configured to incorporate a pair of ultrasonic transceivers 14v and 14w with a certain interval. And it is set as the structure which fixes the support bar 20 in the position where these pair of ultrasonic transmitter-receivers 14v and 14w are inserted in the water pipe 2. FIG.
In addition, the method similar to the saddle type ultrasonic velocimeter 3 which concerns on the 2nd Embodiment of this invention mentioned above can be used for the method of incorporating the ultrasonic transmitter-receivers 14v and 14w in the support rod 20. FIG.

  Further, the interval between the pair of ultrasonic transmitters / receivers incorporated in the support bar 20 is such that the pair of ultrasonic transmitters / receivers is connected to the inner surface 2b of the water pipe 2 in a state where the support bar 20 is fixed to the water pipe 2 as shown in FIG. It is desirable to set the intervals so as to be arranged in the vicinity of

Further, as shown in FIG. 11, in the saddle type ultrasonic velocimeter 4 according to the third embodiment of the present invention, a buffer portion 16 formed of an elastic member such as silicon is provided at the tip of the support rod 20, The buffer portion 16 is configured to be in pressure contact with the inner surface 2 b of the water pipe 2.
In addition, FIG. 11 illustrates the buffer 16 in a state where it is not in contact with the inner surface 2b of the water pipe 2 for convenience of explanation.

Then, a plurality of saddle type ultrasonic velocimeters 4 having such a configuration are arranged at intervals in the axial direction of the pipe of the water pipe 2, and the flow speed of the tap water is measured.
Specifically, referring to FIG. 12, two saddle-type ultrasonic velocimeters 4 a and 4 b are arranged in parallel at intervals in the axial direction of water pipe 2. At this time, the two saddle type ultrasonic velocimeters 4a and 4b are provided at positions where the support rods 20 provided in the two saddle type ultrasonic velocities meters 4a and 4b are inserted from the same direction with respect to the water pipe 2, respectively. Is arranged.
Then, measurement signals are transmitted and received between the ultrasonic transmitter / receiver 14v and the ultrasonic transmitter / receiver 14x. In addition, measurement signals are transmitted and received between the ultrasonic transmitter / receiver 14w and the ultrasonic transmitter / receiver 14y.

Thus, by setting it as the structure which incorporates an ultrasonic transmitter-receiver in the support bar 20, it can prevent effectively that the flow-velocity detection part receives the influence of the flow of tap water. Therefore, it can be set as the ultrasonic velocimeter which can measure more accurately.
In addition, a pair of ultrasonic transmitters / receivers are built in the single support rod 20 with a space therebetween, and the support rods 20 are fixed at positions where the built-in pair of ultrasonic transmitter / receivers are inserted into the water pipe 2. By setting it as a structure, when installing the several saddle type ultrasonic current meter 4 in the water pipe 2, it can be set as the structure which inserts each support rod 20 from the same direction of the water pipe 2. FIG. Therefore, a plurality of saddle type ultrasonic velocimeters 4 can be arranged in parallel in the same direction of the water pipe 2. Therefore, simplification of installation work of the plurality of saddle type ultrasonic velocimeters 4 and reduction of installation space can be realized.
In addition, it is a case where the pipe diameter of the water pipe 2 is large by adopting a configuration in which the two saddle type ultrasonic velocimeters 4a and 4b are arranged in parallel in the axial direction of the water pipe 2 to measure the flow speed of the tap water. However, it is possible to easily measure the average flow rate of tap water at a plurality of points. Therefore, even when the pipe diameter of the water pipe 2 is large, it is possible to provide a flow velocity measuring method that can measure the flow speed of tap water with high accuracy.
Furthermore, the buffer 16 is provided at the tip of the support rod 20 and the buffer 16 is pressed against the inner surface 2b of the water pipe 2 to effectively prevent the support rod 20 from shaking due to the flow rate of tap water. be able to. Therefore, it can be set as the ultrasonic flow velocity meter and flow velocity measuring method which can measure the flow velocity of tap water accurately.

  In the above-described embodiments and modifications of the present invention, the ultrasonic transmitter / receiver is fitted and fixed in the cavity E. However, the present invention is not limited to such a configuration. It is good also as a structure which fixes an ultrasonic transmitter-receiver by filling resin, such as a polyethylene resin, in a. With such a configuration, the wobbling of the ultrasonic transmitter / receiver can be more effectively prevented.

  Moreover, in the modification 2 of the saddle type ultrasonic velocimetry 1 which concerns on the 1st Embodiment of this invention shown in FIG. 8, it was set as the structure which provides the three rectification | straightening chambers in the vertical direction (up-down direction) in three steps. However, the configuration is not necessarily limited to such a configuration, and the arrangement configuration (multi-stage configuration) of the plurality of rectifying chambers can be changed as appropriate. For example, a configuration in which a plurality of rectifying chambers are provided on the left and right, or a configuration in which a plurality of rectifying chambers are provided in combination on the top and bottom and the left and right may be employed. That is, the “multistage” in the present invention is a concept including both the vertical direction and the horizontal direction.

  In the saddle type ultrasonic velocimeter according to the first embodiment and the modification of the present invention, the measurement signal is transmitted and received by reflecting the measurement signal on the rectifying surface in the pair of ultrasonic transceivers. However, the saddle type anemometer in the present invention is not limited to such a measurement method. For example, when a plurality of ultrasonic transmitters / receivers are arranged as in the configuration shown in FIG. 7, a configuration may be adopted in which measurement signals are transmitted / received between a pair of ultrasonic transmitters / receivers that are diagonally opposed. Such a configuration is also included in the scope of the present invention.

  In the present embodiment and the modification, a so-called time difference type ultrasonic element is used as the ultrasonic element. However, the present invention is not necessarily limited to such a configuration. For example, a Doppler type ultrasonic element or the like is used. Other types of ultrasonic transmission elements may be used.

  Further, a waterproof optical lens may be attached to or built in the rectifier or the support rod, and a configuration that allows image recognition of the inner surface state in the pipe line may be added. By setting it as such a structure, it can be set as the ultrasonic current meter which can grasp | ascertain the condition in a pipe line visually.

  In the second and third embodiments of the present invention, the configuration in which the ultrasonic transceiver is built in the support bar 20 is not limited to the configuration described above, and the ultrasonic transceiver is built in the support bar 20. Any configuration is possible as long as it is possible.

  Further, in the third embodiment of the present invention, when a plurality of saddle type ultrasonic velocimeters 4 are installed in the water pipe 2, the support rods 20 are inserted from the same direction of the water pipe 2. However, it is not necessarily limited to such a configuration, and a plurality of support rods 20 may be inserted from multiple directions of the water pipe 2.

  Further, in the present embodiment and the modified example, the water pipe is used as the pipe. However, the pipe is not necessarily limited to such a configuration, and any other pipe through which the fluid to be measured flows, such as an oil pipeline. It is good also as a structure applied to.

  According to the present invention, since the flow velocity of the fluid to be measured can be measured with high accuracy, the industrial applicability in the field of the velocity meter that measures the flow velocity of the fluid to be measured using the ultrasonic transceiver is high.

DESCRIPTION OF SYMBOLS 1 Saddle type ultrasonic current meter 2 Water pipe 2a Hole 2b Inner surface 3 Saddle type ultrasonic current meter 3a Saddle type ultrasonic current meter 3b Saddle type ultrasonic current meter 3c Saddle type ultrasonic current meter 4 Saddle type ultrasonic current meter 4a Saddle type ultrasonic current meter 4b Saddle type ultrasonic current meter 10 Flow rate detection unit 10a Rectifier 11a Horizontal rectifier plate 11b Horizontal rectifier plate 11c Horizontal rectifier plate 11d Horizontal rectifier plate 11e Horizontal rectifier plate 11f Horizontal rectifier plate 12a Vertical rectifier plate 12b Vertical rectifier Plate 13 Rectification chamber 14a Ultrasonic transceiver 14b Ultrasonic transceiver 14c Ultrasonic transceiver 14d Ultrasonic transceiver 14e Ultrasonic transceiver 14f Ultrasonic transceiver 14g Ultrasonic transceiver 14h Ultrasonic transceiver 14i Ultrasonic transceiver 14j Ultrasonic Transceiver 14k Ultrasonic Transceiver 14m Ultrasonic Transceiver 14p Ultrasonic Transceiver 14 q Ultrasonic Transceiver 14r Ultrasonic Transceiver 14s Ultrasonic Transceiver 14t Ultrasonic Transceiver 14u Ultrasonic Transceiver 14v Ultrasonic Transceiver 14w Ultrasonic Transceiver 14x Ultrasonic Transceiver 14y Ultrasonic Transceiver 15 Frame 16 Buffer Portion 20 Support rod 20a Concave recess 30 Adjustment handle 40 Cable 50 Support rod fixing portion 51 First saddle 51a Hole 52 Cylindrical insertion portion 52a Connection chamber 52b Gate valve chamber 52c Flow rate detection portion Standby chamber 53 Sealing portion 53a Bolt 53b Nut 54 Second saddle 55 Sealing rubber 60 Fixing member 61 Bolt 62 Nut 70 Measurement unit 71 Transmission / reception control unit 72 Flow rate calculation unit 73 Flow rate calculation unit 74 Abnormal value determination unit 75 Measurement control unit 76 Storage unit 77 Display unit B Open / close Valve E Cavity E1 Recessed part for ultrasonic transducer fitting H Connection wiring Connector P plug S1 rectification surface S2 rectification surface S3 straightening surface S4 straightening surface S5 straightening surface U ultrasonic Sojushinko unit U1 end face

Claims (10)

  An ultrasonic flowmeter that measures the flow velocity of a fluid to be measured in a pipe using a flow velocity detector having an ultrasonic transmitter and an ultrasonic receiver, and a flow velocity detector that includes the flow velocity detector. A support rod for supporting and for inserting or exposing the flow velocity detection portion into the pipeline from a hole provided in the pipeline, and a support rod fixing portion for fixing the support rod to the pipeline in a watertight manner, A first saddle in which a rod fixing portion is disposed at a position of a hole in the conduit, and the support rod that extends from the first saddle in a tubular shape in a radial direction of the conduit and supports the flow velocity detection portion And a second saddle disposed on an outer surface of a pipe line facing the first saddle, and the first saddle and the second saddle are disposed through a fixing member. The saddle is fastened with a pipe interposed therebetween, and the support rod is fixed to the pipe. Le ultrasonic current meter.   The cylindrical insertion portion extends from the first saddle in the radial direction of the pipe line, and includes a gate valve chamber including a gate valve, and extends from the gate valve chamber in the pipe radial direction to the flow velocity detection unit. The saddle type ultrasonic current meter according to claim 1, further comprising a flow velocity detection unit standby chamber that constitutes a standby space.   The flow velocity detection unit includes an ultrasonic transmitter and an ultrasonic receiver in a rectifier including a rectifying chamber composed of a pair of upper and lower horizontal rectifying plates and a pair of vertical rectifying plates connecting the upper and lower pair of horizontal rectifying plates. The saddle type ultrasonic velocimeter according to claim 1 or 2, characterized by being attached.   The saddle type ultrasonic current meter according to claim 3, wherein the inner surface of the rectifying chamber is a flat surface having a rectangular shape and no irregularities.   The saddle type ultrasonic current meter according to claim 3, wherein the inner surface of the rectifying chamber has a bell mouth shape.   Each of the upper lateral rectifying plate and the lower lateral rectifying plate includes at least a pair of an ultrasonic transmitter and an ultrasonic receiver, and an ultrasonic transmitter and an ultrasonic receiver included in the upper lateral rectifying plate, Between the upper ultrasonic transmitter / receiver composed of the above, the measurement signal is transmitted / received via the lower lateral rectifier plate, and is composed of an ultrasonic transmitter and an ultrasonic receiver provided in the lower lateral rectifier plate The saddle type ultrasonic flow velocity according to any one of claims 3 to 5, wherein a measurement signal is transmitted and received between the lower ultrasonic transducers to be transmitted via an upper lateral rectifying plate. Total.   The saddle type ultrasonic wave according to claim 6, wherein the rectifier includes a plurality of rectifying chambers, and each rectifying chamber includes at least one of an upper ultrasonic transmitter / receiver and a lower ultrasonic transmitter / receiver. An anemometer.   The saddle type ultrasonic velocimeter according to claim 1 or 2, wherein the flow velocity detection unit includes at least one of an ultrasonic transmitter and an ultrasonic receiver in a support rod.   The saddle type ultrasonic current meter according to any one of claims 1 to 8, wherein an ultrasonic transmitter and an ultrasonic receiver are detachably provided.   A flow velocity measuring method, wherein a plurality of saddle type ultrasonic velocimeters according to claim 8 are arranged in an axial direction of a pipeline to measure a flow velocity of a fluid to be measured in the pipeline.

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