阅读说明：本技术 超声波式流量测定装置 (Ultrasonic flow rate measuring device ) 是由 村上英一 铃木吉昭 于 2020-04-21 设计创作，主要内容包括：本发明涉及一种超声波式流量测定装置。一对管体保持部(2、3)通过轴部来对于基体(1)开闭自如地连结,在各管体保持部(2、3)内,超声波传送接收部(4、5)在斜方向对向地配置。当将管体(P)插入形成在夹持部(2a、3a)的保持凹部(2b、3b)间且夹持管体(P)时,将超声波传送接收元件(4a、5a)密贴在超声波传送接收部(4、5)的后端面的超声波传达体(4b、5b)则成为超声波传达体(4b、5b)的前端面几乎密贴在管体(P)的表面的两侧的状态。在流量测定时,从超声波传送接收部(4、5)的一方传送到管体(P)内的流体中的超声波束(B)交互地重复在管体(P)内在斜方向传播且在超声波传送接收部(4、5)的另一方接收的情形。求出超声波束(B)对于流体的往时间与返时间的传播时间差以求出流速。(The present invention relates to an ultrasonic flow rate measuring apparatus. A pair of pipe body holding parts (2, 3) are openably and closably connected to the base body (1) via shaft parts, and ultrasonic wave transmitting and receiving parts (4, 5) are disposed in the pipe body holding parts (2, 3) so as to face each other in an oblique direction. When a pipe body (P) is inserted between holding concave portions (2b, 3b) formed in holding portions (2a, 3a) and the pipe body (P) is held, ultrasonic transmitters (4b, 5b) having ultrasonic transmission/reception elements (4a, 5a) in close contact with the rear end surfaces of the ultrasonic transmission/reception portions (4, 5) are in a state in which the front end surfaces of the ultrasonic transmitters (4b, 5b) are in close contact with almost both sides of the surface of the pipe body (P). In flow measurement, an ultrasonic beam (B) transmitted from one of ultrasonic transmission/reception units (4, 5) to a fluid in a pipe (P) alternately repeats transmission in an oblique direction in the pipe (P) and reception at the other of the ultrasonic transmission/reception units (4, 5). The propagation time difference between the forward time and the backward time of the ultrasonic beam (B) with respect to the fluid is obtained to obtain the flow velocity.)

1. An ultrasonic flow rate measurement device that is attachable to and detachable from an outside of a pipe body through which a fluid flows, and that alternately transmits and receives an ultrasonic beam propagating obliquely across the pipe body to measure a flow rate of the fluid, characterized in that:

The ultrasonic flow rate measurement device is provided with:

a frame-shaped base;

a pair of tube holding portions which are respectively arranged along both side portions of the base body and are openable and closable via shaft portions; and

a pair of ultrasonic transmission/reception units arranged diagonally opposite to each other in the tube holding unit;

the pair of tube holding portions each have:

a clamping portion that clamps the pipe body by closing; and

holding recesses provided along the clamping portion so as to face each other; the pair of ultrasonic transmission/reception units each have:

an ultrasonic wave transmitting and receiving element that transmits and receives the ultrasonic beam; and

and an ultrasonic transmitter that projects and emits the ultrasonic beam into and out of the pipe body from an oblique direction by closely attaching a front end surface to the pipe body and closely attaching a rear end surface to the ultrasonic transmission/reception element.

2. An ultrasonic flow measurement device according to claim 1, wherein the tube holding portion is opened at both sides by a predetermined angle to be attached to and detached from the tube.

3. An ultrasonic flow measurement device according to claim 1, wherein the tube body holding portion is opened to insert the tube body between the holding concave portions, the tube body holding portion is closed to clamp the tube body by the clamp portion, and the tube body is held by the holding concave portions.

4. An ultrasonic flow rate measuring device according to claim 1, wherein the distal end surface of the ultrasonic transmitter is formed in a planar shape, and the distal end surface slightly protrudes in the holding recess.

5. An ultrasonic flow rate measuring device according to claim 4, wherein the distal end surface of the ultrasonic transmitter presses the flexible tube from both sides and deforms it into a flat shape.

6. An ultrasonic flow measurement device according to claim 1, wherein the closed state of the tube holders with respect to the tube is locked by a locking member.

7. An ultrasonic flow measurement device according to claim 6, wherein the lock member has an elliptical ring, and a pair of projections provided on a pair of the tube holding portions, respectively, are locked by being sandwiched between elliptical minor axes by rotation of the elliptical ring.

Technical Field

The present invention relates to a clamp-on ultrasonic flow measuring device which is installed outside a pipe body and which transmits an ultrasonic beam (ultrasonic beam) to a fluid in the pipe body to measure a flow rate of the fluid.

Background

Patent documents 1 and 2 disclose clamp-type ultrasonic flow rate measuring devices including: the ultrasonic probe is attached to the outside of an existing tubular body, and an ultrasonic beam is propagated in an oblique direction in the tubular body to measure the flow rate of a fluid flowing in the tubular body.

[ Prior art documents ]

Patent document 1: japanese patent laid-open No. 10-221137.

Patent document 2: japanese patent laid-open No. 2003-75219.

Disclosure of Invention

[ problems to be solved by the invention ]

However, in these clamp-type ultrasonic flow rate measuring devices, it is necessary to attach a pair of ultrasonic transmitting and receiving units that match the shape of the pipe body by a complicated and time-consuming assembly operation. Therefore, it is difficult to quickly and accurately install the ultrasonic flow rate measurement device in the pipe body at the time of measurement.

The present invention has an object to provide an ultrasonic flow rate measuring device which can eliminate the above-mentioned problems and can be easily mounted on a pipe body and at an accurate position.

[ Effect of the invention ]

According to the ultrasonic flow rate measuring device of the present invention, the flow rate of the fluid in the pipe can be measured while being accurately mounted to the pipe with almost one touch (one touch).

Drawings

Fig. 1 is an exploded perspective view of an ultrasonic flow rate measurement device according to an embodiment.

Fig. 2 is a perspective view showing a state of being inserted into the pipe body.

Fig. 3 is a cross-sectional view taken in the horizontal direction.

Fig. 4 is a perspective view of the tube holding portion in an open state.

Fig. 5 is a perspective view of a primary locked state by the locking member.

Fig. 6 is a perspective view of a secondary locked state by the locking member.

Description of reference numerals:

1: base body

1a,1b,1c,1d axial hole portions

2,3 tube body holding part

2a,3a clamping part

2b,3b holding recess

2c,3c lower edge

2d,3d insertion hole

2e,3e protruding halves

2f,3f projection for locking

2g,3g, root cause part

4,5: ultrasonic wave transmitting/receiving part

4a,5a ultrasonic wave transmitting and receiving element

4b,5b ultrasonic wave transmitting body

4b ', 5 b' front end face

4b ', 5 b' rear end face

4c,5c conducting wire

6 locking member

Oval 6a ring

6b is a plate body

6c circular ring

6d, knob

6e flange part

7a,7b,7c,7d shaft portion

8: calculation control part

9 display part

B ultrasonic beam

F fluid

P is a pipe body

Detailed Description

The present invention will be described in detail based on embodiments of the drawings.

Fig. 1 is an exploded perspective view of an ultrasonic flow rate measurement device according to an embodiment, fig. 2 is a perspective view of a state in which the device is mounted on the outside of a pipe body, fig. 3 is a cross-sectional view taken in a horizontal direction, and fig. 4 is a perspective view of a state in which a pipe body holding portion is opened.