Flow velocity measuring device

Abstract

The invention discloses a flow velocity measurement device, and relates to the technical field of flow velocity measurement. The flow velocity measuring device comprises a first flow velocity measuring unit which comprises a first fixing part which is of a cavity structure with openings in the two ends and is fixedly arranged on a to-be-measured flow channel, the first end of the first fixing part is arranged outside the to-be-measured flow channel, and the second end of the first fixing part is arranged inside the to-be-measured flow channel; the first signal receiving and transmitting part is arranged in the cavity structure of the first fixing part, the first end of the first signal receiving and transmitting part is detachably connected with the first end of the first fixing part, and the second end of the first signal receiving and transmitting part is in contact with the fluid to be detected. The second flow velocity measurement unit and the first flow velocity measurement unit have the same structure; and the signal processing unit is electrically connected with the first flow velocity measuring unit and the second flow velocity measuring unit. The first flow velocity measurement unit and the second flow velocity measurement unit are correspondingly and fixedly arranged on the two sides of the to-be-measured flow channel. The flow velocity measuring device is simple in structure and convenient to disassemble and assemble.

Description

Technical Field

[0001] The present application relates to the technical field of flow velocity measurement, and in particular to a flow velocity measurement device. Background Art

[0002] Flow velocity measurement devices based on the ultrasonic time difference method are widely used in the field of fluid measurement in urban water supply and drainage, petroleum, chemical, pharmaceutical, metallurgy and electric power industries. Figure 1 The ultrasonic time difference method flow velocity measurement device usually installs transducers a in pairs upstream and downstream of the flow channel 200 to be measured. The installation of transducers a generally adopts the opposite-shooting method, and the paired transducers a transmit and receive ultrasonic signals to each other.

[0003] The transducer a can be installed on the flow channel 200 to be measured by external placement or insertion placement. However, the external placement has problems such as poor accuracy, complicated operation and poor consistency. Therefore, in order to improve the measurement accuracy and consistency, the insertion placement of the transducer a is generally used.

[0004] However, the inventor of the present application has found that the current insertion-type ultrasonic time-difference flow velocity measurement device has the following problems:

[0005] 1. For application scenarios such as flood season and experimental testing that only require periodic measurement and no long-term monitoring, or application scenarios such as measuring the flow rate of the same long flow channel in sequence, which require frequent disassembly and assembly of transducers, due to individual differences among operators, the consistency of installation parameters (such as installation position or installation angle, etc.) of multiple sets of transducers is a variable that is difficult to control;

[0006] 2. When the fluid temperature or pressure is too high, it is difficult to detect and maintain the transducer without the fluid flowing continuously. Summary of the invention

[0007] The present application aims to provide a flow rate measuring device, which can solve the problem of consistency in the installation of transducer a and the problem of difficulty in detecting and maintaining transducer a without continuous flow.

[0008] According to one aspect of the present application, the present application provides a flow rate measuring device. The flow rate measuring device includes a first flow rate measuring unit, a second flow rate measuring unit and a signal processing unit. The first flow rate measuring unit and the second flow rate measuring unit are relatively fixedly arranged on both sides of the flow channel to be measured; the first flow rate measuring unit includes a first fixing part and a first signal transceiver. The first fixing part is a cavity structure with openings at both ends. The first fixing part is fixedly arranged on one side of the flow channel to be measured. The first end of the first fixing part is arranged outside the flow channel to be measured, and the second end of the first fixing part is arranged inside the flow channel to be measured, and the second end of the first fixing part is in contact with the fluid to be measured in the flow channel to be measured. The first signal transceiver is arranged inside the cavity structure of the first fixing part, and is detachably connected to the first fixing part, and the first end of the first signal transceiver is detachably connected to the first end of the first fixing part. The second end of the first signal transceiver is in contact with the fluid to be measured through the second end of the first fixing part. The signal processing unit is electrically connected to the first signal transceiver; the second flow rate measuring unit includes a second fixed part and a second signal transceiver, the second fixed part has the same structure as the first fixed part, and the second signal transceiver is electrically connected to the first signal transceiver.

[0009] According to some embodiments of the present application, the first flow rate measuring unit also includes a first conducting part, the first end of the first conducting part is detachably connected to the second end of the first fixed part, and the first end of the first conducting part is in contact with the fluid to be measured; the second flow rate measuring unit also includes a second conducting part, the first end of the second conducting part is detachably connected to the second end of the second fixed part, and the first end of the second conducting part is in contact with the fluid to be measured.

[0010] According to some embodiments of the present application, the first signal transceiver unit and the second signal transceiver unit are both transducers.

[0011] According to some embodiments of the present application, the first conducting part and the second conducting part are both sound-transmitting layers.

[0012] According to some embodiments of the present application, the first conducting part and the second conducting part are both metal sound-transmitting layers.

[0013] According to some embodiments of the present application, a screw hole is provided at the first end of the first fixing part, a thread is provided at the first end of the first signal transceiver part, and the first end of the first signal transceiver part is fixed by cooperating with the screw hole at the first end of the first fixing part through the thread; a screw hole is provided at the first end of the second fixing part, a thread is provided at the first end of the second signal transceiver part, and the first end of the second signal transceiver part is fixed by cooperating with the screw hole at the first end of the second fixing part through the thread.

[0014] According to some embodiments of the present application, a screw hole is provided at the second end of the first fixing portion, a thread is provided at the first end of the first conducting portion, and the first end of the first conducting portion is fixed by cooperating with the screw hole at the second end of the first fixing portion through the thread; a screw hole is provided at the second end of the second fixing portion, a thread is provided at the first end of the second conducting portion, and the first end of the second conducting portion is fixed by cooperating with the screw hole at the second end of the second fixing portion through the thread.

[0015] According to some embodiments of the present application, a first coupling layer is arranged between the second end of the first signal transceiver unit and the second end of the first conductive unit; a second coupling layer is arranged between the second end of the second signal transceiver unit and the second end of the second conductive unit.

[0016] According to some embodiments of the present application, the flow rate measurement device includes at least two flow rate measurement groups; the flow rate measurement group includes a first flow rate measurement unit and a second flow rate measurement unit.

[0017] According to another aspect of the present application, the present application provides a flow rate measuring device. The flow rate measuring device includes a first flow rate measuring unit, a second flow rate measuring unit and a signal processing unit. The first flow rate measuring unit and the second flow rate measuring unit are relatively fixedly arranged on both sides of the flow channel to be measured. The first flow rate measuring unit includes a first fixing part, a first signal transceiver part and a first conducting part. The first fixing part is a cavity structure with openings at both ends. The first end of the first fixing part is arranged outside the flow channel to be measured, the second end of the first fixing part is inserted into the flow channel to be measured, and the second end of the first fixing part does not contact the fluid to be measured in the flow channel to be measured. The first signal transceiver part is arranged inside the cavity structure of the first fixing part, and is fixedly connected to the first fixing part, and the first end of the first signal transceiver part is fixedly connected to the first end of the first fixing part. The first conducting part is arranged on one side of the flow channel to be measured, the second end of the first conducting part is detachably connected to the second end of the first fixing part, and the first end of the first conducting part is in contact with the fluid to be measured. The signal processing unit is electrically connected to the first signal transceiver part. The second flow rate measuring unit includes a second fixing part, a second signal transceiver part and a second conducting part. The second fixing part has the same structure as the first fixing part, the second signal transceiver has the same structure as the first signal transceiver, and the second transmission part has the same structure as the first transmission part. The signal processing unit is electrically connected to the second signal transceiver.

[0018] Beneficial Effects

[0019] The present application receives and sends sound wave signals through the first signal transceiver unit and the second signal transceiver unit, converts the sound wave signals into electrical signals, and determines the flow rate of the fluid to be measured through the converted electrical signals.

[0020] The present application fixes the first fixing part and the second fixing part on opposite sides of the flow channel to be measured, and detachably fixes the first signal transceiver part to the first fixing part, and detachably fixes the second signal transceiver part to the second fixing part, so that the first signal transceiver part and the second signal transceiver part can be removed and installed at any time.

[0021] In this application, after the first flow rate measuring unit and the second flow rate measuring unit are installed on the flow channel to be measured, if the first signal transceiver and the second signal transceiver need to be reinstalled (such as maintenance and repair), there is no need to disassemble the first fixing part and the second fixing part, which can solve the problem of consistency in the propagation direction of the sound wave signal and the consistency in the installation of the first signal transceiver and the second signal transceiver. And it can prevent the fluid from flowing out of the flow channel.

[0022] The present application can arrange the first fixing part and the second fixing part in advance on opposite sides of the flow channel to be measured, and can install the first signal transceiver part and the second signal transceiver part when the fluid in the flow channel to be measured is continuously flowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram showing the arrangement of transducers by the opposite beam method;

[0025] Figure 2 A schematic structural diagram of a flow velocity measuring device according to an embodiment of the present application is shown;

[0026] Figure 3 A schematic diagram showing the arrangement of a first flow rate measurement unit and a second flow rate measurement unit according to an embodiment of the present application;

[0027] Figure 4 A schematic structural diagram of a first flow rate measurement unit according to an embodiment of the present application is shown;

[0028] Figure 5 A schematic structural diagram showing a first flow rate measurement unit after installation according to an embodiment of the present application;

[0029] Figure 6 A schematic cross-sectional structure diagram showing a first flow velocity measurement unit after installation according to an embodiment of the present application;

[0030] Figure 7 A schematic diagram showing the structure of a first signal transceiver according to an embodiment of the present application;

[0031] Figure 8 Another schematic diagram showing the arrangement of the first flow rate measurement unit and the second flow rate measurement unit according to an embodiment of the present application.

[0032] Reference numerals:

[0033] Transducer a.

[0034] Flow velocity measuring device 100; flow channel to be measured 200.

[0035] Flow rate measurement group 10.

[0036] A first flow velocity measuring unit 1; a second flow velocity measuring unit 2; and a signal processing unit 3.

[0037] a first fixing portion 11 ; a first signal transceiver portion 12 ; and a first transmission portion 13 .

[0038] a first end 111 of the first fixing portion; and a second end 112 of the first fixing portion.

[0039] a first end 121 of the first signal transceiver; and a second end 122 of the first signal transceiver.

[0040] a first end 131 of the first conducting portion; and a second end 132 of the first conducting portion.

[0041] Preset angle θ; distance L for ultrasonic signal transmission.

[0042] Transmission cable a1; piezoelectric ceramic chip a2; sound-transmitting layer a3; external sleeve a4; sealing sleeve a5; cable protective sleeve a6. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0044] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of these specific details, or other modes, components, materials, devices, etc. may be adopted. In these cases, known structures, methods, devices, implementations, materials or operations will not be shown or described in detail.

[0045] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0046] The terms "first", "second" and the like in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order.

[0047] The following is a clear and complete description of the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] According to one aspect of the present application, the present application provides a flow rate measurement device 100. Figure 2 The flow velocity measurement device 100 includes a first flow velocity measurement unit 1 , a second flow velocity measurement unit 2 and a signal processing unit 3 .

[0049] See also Figure 3 , the first flow velocity measuring unit 1 and the second flow velocity measuring unit 2 are relatively fixedly arranged on both sides of the flow channel 200 to be measured. The first flow velocity measuring unit 1 and the second flow velocity measuring unit 2 are arranged in parallel and on the same straight line. There is a preset angle θ between the first flow velocity measuring unit 1 and the flow channel 200 to be measured. The range of the preset angle θ can be 0°<θ<180°.

[0050] For example, the preferred range of the preset angle θ may be: 45°<θ<75° or 105°<θ<135°. When the preset angle θ is within the preferred range, the flow rates of the fluid to be measured are clearly different, and the industrial process is simple and easy to process.

[0051] According to an example embodiment, the flow channel 200 to be tested may be a long straight flow channel with a certain length, a regular cross section, and a constant front and rear cross section.

[0052] According to an example embodiment, see Figure 4-Figure 6 The first flow velocity measurement unit 1 includes a first fixing part 11 and a first signal transceiver part 12 .

[0053] The first fixing portion 11 is a cavity structure with openings at both ends.

[0054] For example, see Figure 4-Figure 6 , the first fixing portion 11 can be a cylindrical tubular structure.

[0055] The first fixing portion 11 is fixedly disposed on the flow channel 200 to be measured, the first end 111 of the first fixing portion is disposed outside the flow channel 200 to be measured, the second end 112 of the first fixing portion is disposed inside the flow channel 200 to be measured, and the second end 112 of the first fixing portion is in contact with the fluid to be measured in the flow channel 200 to be measured. For example, the first fixing portion 11 can be inserted into the flow channel 200 to be measured.

[0056] See also Figure 4-Figure 6 The first signal transceiver 12 is disposed inside the cavity structure of the first fixing part 11 and is detachably connected to the first fixing part 11. The first end 121 of the first signal transceiver is detachably connected to the first end 111 of the first fixing part. The second end 122 of the first signal transceiver contacts the fluid to be measured through the second end 112 of the first fixing part.

[0057] The signal processing unit 3 is electrically connected to the first signal transceiver 12 .

[0058] For example, the signal processing unit 3 sends an electrical signal to the first signal transceiver 12. After receiving the electrical signal, the first signal transceiver 12 converts the electrical signal into a sound wave signal (e.g., an ultrasonic wave signal). The first signal transceiver 12 can also convert the received sound wave signal into an electrical signal, and the first signal transceiver 12 sends the electrical signal to the signal processing unit 3.

[0059] The signal processing unit 3 may be a client device (such as a host, etc.) having data processing capabilities.

[0060] The second flow velocity measurement unit 2 includes a second fixing portion and a second signal transceiver portion.

[0061] The second fixing part is a cavity structure with openings at both ends. The second fixing part can be a cylindrical tubular structure. The second fixing part is fixedly arranged on the flow channel 200 to be measured, the first end of the second fixing part is arranged outside the flow channel 200 to be measured, the second end of the second fixing part is arranged inside the flow channel 200 to be measured, and the second end of the second fixing part is in contact with the fluid to be measured in the flow channel 200 to be measured. For example, the second fixing part can be inserted into the flow channel 200 to be measured.

[0062] The second signal transceiver is disposed inside the cavity structure of the second fixed part and is detachably connected to the second fixed part. The first end of the second signal transceiver is detachably connected to the first end of the second fixed part. The second end of the second signal transceiver contacts the fluid to be measured through the second end of the second fixed part.

[0063] The signal processing unit 3 is electrically connected to the second signal transceiver. The signal processing unit 3 sends an electrical signal to the second signal transceiver. After receiving the electrical signal, the second signal transceiver converts the electrical signal into a sound wave signal (e.g., an ultrasonic wave signal). The second signal transceiver can also convert the received sound wave signal into an electrical signal, and the second signal transceiver sends the electrical signal to the signal processing unit 3.

[0064] Optionally, both the first signal transceiver unit 12 and the second signal transceiver unit may be transducers a.

[0065] Transducer a can convert an electrical signal into an ultrasonic signal through the piezoelectric effect, or transducer a can convert an ultrasonic signal into an electrical signal through the piezoelectric effect.

[0066] See also Figure 7 , the transducer a may include two transmission cables a1, a piezoelectric ceramic chip a2, a sound-transmitting layer a3 and an external sleeve a4. The two transmission cables a1 are respectively the positive line of the signal cable and the negative line of the signal cable. The two transmission cables a1 can transmit electrical signals. One end of the two transmission cables a1 can be connected to the signal processing unit 3, and the other end of the two transmission cables a1 can be connected to the piezoelectric ceramic chip a2. The piezoelectric ceramic chip a2 can convert an electrical signal into an ultrasonic signal, or can convert an ultrasonic signal into an electrical signal. After the piezoelectric ceramic chip a2 converts the electrical signal into an ultrasonic signal, it sends the ultrasonic signal to the sound-transmitting layer a3. The sound-transmitting layer a3 can transmit or receive ultrasonic signals.

[0067] For example, the sound-transmitting layer a3 of the first signal transceiver 12 (transducer a) can transmit an ultrasonic signal to the sound-transmitting layer a3 of the second signal transceiver (transducer a). The sound-transmitting layer a3 of the first signal transceiver 12 (transducer a) can also receive an ultrasonic signal transmitted from the sound-transmitting layer a3 of the second signal transceiver (transducer a).

[0068] The sound-transmitting layer a3 can be inserted into one end of the external sleeve a4 and fixedly connected to one end of the external sleeve a4. After the piezoelectric ceramic chip a2 and the two transmission cables a1 are arranged inside the external sleeve, the piezoelectric ceramic chip a2 contacts the sound-transmitting layer a3, and the two transmission cables a1 can be fixedly connected to the other end of the external sleeve a4 through the sealing sleeve a5. The sealing sleeve a5 can prevent the fluid to be measured or debris from entering the interior of the external sleeve a4.

[0069] A cable protective sleeve a6 may be arranged around the outside of the two transmission cables a1 that are not inserted into the external sleeve a4. The cable protective sleeve a6 may prevent the two transmission cables a1 from directly contacting the fluid to be measured.

[0070] For example, after the sound-transmitting layer a3 is fixedly connected to one end of the external sleeve a4, it becomes the second end 122 of the first signal transceiver. After the sealing sleeve a5 is fixedly connected to the other end of the external sleeve a4, it becomes the first end 121 of the first signal transceiver.

[0071] The first end 121 of the first signal transceiver is detachably connected to the first end 111 of the first fixing part, that is, the other end of the external sleeve a4 can be detachably connected to the first end 111 of the first fixing part. The second end 122 of the first signal transceiver is in contact with the fluid to be measured through the second end 112 of the first fixing part, that is, the sound-transmissive layer a3 is in contact with the fluid to be measured through the second end 112 of the first fixing part.

[0072] After the sound-transmitting layer a3 is fixedly connected to one end of the external sleeve a4, it becomes the second end of the second signal transceiver. After the sealing sleeve a5 is fixedly connected to the other end of the external sleeve a4, it becomes the first end of the second signal transceiver.

[0073] The first end of the second signal transceiver is detachably connected to the first end of the second fixing part, that is, the other end of the outer sleeve a4 is detachably connected to the first end of the second fixing part. The second end of the second signal transceiver contacts the fluid to be measured through the second fixing part 112 .

[0074] According to the exemplary embodiment, the signal processing unit 3 simultaneously transmits the electrical signal to the first signal transceiving portion 12 (transducer a) and the second signal transceiving portion (transducer a).

[0075] After receiving the electrical signal, the first signal transceiver 12 (transducer a) converts the electrical signal into an ultrasonic signal. After receiving the electrical signal, the second signal transceiver (transducer a) converts the electrical signal into an ultrasonic signal.

[0076] Optionally, the first end 111 of the first fixing portion is provided with a screw hole, the first end 121 of the first signal transceiver portion is provided with a thread, and the first end 121 of the first signal transceiver portion is fixed by matching with the screw hole of the first end 111 of the first fixing portion through the thread.

[0077] The first end of the second fixing part is provided with a screw hole, the first end of the second signal transceiver part is provided with a thread, and the first end of the second signal transceiver part is fixed by matching with the screw hole of the first end of the second fixing part through the thread.

[0078] For example, see Figure 7 The outer surface of the other end of the outer sleeve a4 of the transducer a can be provided with a thread. The outer sleeve a4 is fixed by matching with the screw hole of the first end 111 of the first fixing part through the thread. And the outer sleeve a4 is fixed by matching with the screw hole of the first end of the second fixing part through the thread.

[0079] Through the cooperation between the thread and the screw hole, the first signal transceiver unit 12 and the second signal transceiver unit can be easily installed and disassembled.

[0080] Exemplarily, the measurement process of the first flow rate measurement unit 1 and the second flow rate measurement unit 2 may be:

[0081] In the process of measuring the flow rate, the first fixing part 11 and the second fixing part can be first inserted into the opposite sides of the flow channel 200 to be measured, so that the second end 112 of the first fixing part contacts the fluid to be measured, and the second end of the second fixing part contacts the fluid to be measured. Then, the second end 122 of the first signal transceiver is inserted from the first end 111 of the first fixing part into the interior of the first fixing part 11, so that the first end 121 of the first signal transceiver is fixedly connected to the first end 111 of the first fixing part; the second end of the second signal transceiver is inserted from the first end of the second fixing part into the interior of the second fixing part, so that the first end of the second signal transceiver is fixedly connected to the first end of the second fixing part.

[0082] The signal processing unit 3 simultaneously sends an electrical signal to the first signal transceiver 12 (transducer a) and the second signal transceiver (transducer a). After receiving the electrical signal, the first signal transceiver 12 (transducer a) converts the electrical signal into an ultrasonic signal. After receiving the electrical signal, the second signal transceiver (transducer a) converts the electrical signal into an ultrasonic signal. The first signal transceiver 12 sends the ultrasonic signal to the second signal transceiver, and at the same time, the second signal transceiver sends the ultrasonic signal to the first signal transceiver 12.

[0083] Since the first flow velocity measuring unit 1 and the second flow velocity measuring unit 2 are correspondingly arranged on both sides of the flow channel 200 to be measured, the ultrasonic signal emitted by the first signal transceiver 12 (transducer a) is transmitted downstream, and the ultrasonic signal emitted by the second signal transceiver (transducer a) is transmitted upstream.

[0084] After receiving the ultrasonic signal transmitted by the second signal transceiver (transducer a), the first signal transceiver 12 (transducer a) converts the ultrasonic signal into an electrical signal and sends the electrical signal to the signal processing unit 3 .

[0085] After receiving the ultrasonic signal transmitted by the first signal transceiver (transducer a), the second signal transceiver (transducer a) converts the ultrasonic signal into an electrical signal and sends the electrical signal to the signal processing unit 3 .

[0086] After the signal processing unit 3 receives the electrical signal from the first signal transceiver 12 and the electrical signal from the second signal transceiver, the signal processing unit 3 can determine the propagation time difference of the ultrasonic signal in the downstream propagation and the upstream propagation according to the two different electrical signals. The signal processing unit 3 can determine the flow rate of the fluid to be measured according to the propagation time difference of the ultrasonic signal in the downstream propagation and the upstream propagation.

[0087] For example, the signal processing unit 3 can calculate the flow rate of the fluid to be measured according to the following formula:

[0088]

[0089] Among them, v is the flow velocity of the fluid to be measured; L is the distance of ultrasonic signal transmission, that is, the distance between the second end 122 of the first signal transceiver unit and the second end of the second signal transceiver unit; θ is the angle between the propagation direction of the ultrasonic signal and the flow velocity v of the flow diagram to be measured (preset angle θ); c is the speed of sound in a stationary medium; △t is the propagation time difference of the ultrasonic signal in downstream propagation and upstream propagation.

[0090] After the process of measuring the flow velocity is completed, the first end 121 of the first signal transceiver unit and the first end 111 of the first fixing unit can be disassembled to take out the first signal transceiver unit 12; the first end of the second signal transceiver unit and the first end of the second fixing unit can be disassembled to take out the second signal transceiver unit. In the next measurement process, the first signal transceiver unit 12 is fixedly connected to the first fixing unit 11, and the second signal transceiver unit is fixedly connected to the second fixing unit. In this way, the first signal transceiver unit 12 and the second signal transceiver unit can be kept consistent with the last installation position and installation angle.

[0091] Since the second fixing part has the same structure as the first fixing part 11, the second signal transceiver has the same structure as the first signal transceiver 12. During the measurement process, the second signal transceiver and the first signal transceiver 12 can be installed interchangeably, that is, the second signal transceiver can be fixedly connected to the first fixing part 11, and the first signal transceiver 12 can be fixedly connected to the second fixing part.

[0092] The first fixing portion 11 and the second fixing portion may also be arranged on two opposite sides of the flow channel 200 to be tested during the construction of the flow channel 200 to be tested.

[0093] Through the above-mentioned embodiments, the present application transmits and receives sound wave signals through the first signal transceiver 12 and the second signal transceiver, converts the sound wave signals into electrical signals, and determines the flow rate of the fluid to be measured through the converted electrical signals.

[0094] The present application fixes the first fixing part 11 and the second fixing part on opposite sides of the flow channel 200 to be tested, and detachably fixes the first signal transceiver part 12 to the first fixing part 11, and detachably fixes the second signal transceiver part to the second fixing part, so that the first signal transceiver part 12 and the second signal transceiver part can be removed and installed at any time.

[0095] In the present application, after the first flow velocity measuring unit 1 and the second flow velocity measuring unit 2 are installed on the flow channel 200 to be measured, when the first signal transceiver unit 12 and the second signal transceiver unit need to be reinstalled (such as maintenance and repair), there is no need to disassemble the first fixing unit 11 and the second fixing unit, thereby solving the problem of consistency of the propagation direction of the sound wave signal and the problem of consistency in the installation of the first signal transceiver unit 12 and the second signal transceiver unit.

[0096] The present application can arrange the first fixing part 11 and the second fixing part in advance on opposite sides of the flow channel 200 to be tested, and can install the first signal transceiver part 12 and the second signal transceiver part while the fluid to be tested in the flow channel 200 is continuously flowing.

[0097] The inventor of the present application has also found that the ultrasonic probe (or transducer a) installed in an inserted manner needs to contact the fluid to be measured in most cases. In places where the fluid flow rate is fast or varies greatly, the ultrasonic probe (or transducer a) is easily affected by the flow rate to cause displacement or tilt, and there is also the risk of being hit by solid impurities or corroded by chemical substances.

[0098] Alternatively, see Figure 5-Figure 6 The first flow velocity measurement unit 1 further includes a first conducting part 13 .

[0099] The first end 131 of the first conducting portion is detachably connected to the second end 112 of the first fixing portion, and the first end 131 of the first conducting portion is in contact with the fluid to be measured.

[0100] The second flow rate measuring unit 2 further includes a second conducting part. The first end of the second conducting part is detachably connected to the second end of the second fixing part, and the first end of the second conducting part is in contact with the fluid to be measured.

[0101] Exemplarily, the first conducting part 13 and the second conducting part are both sound-transmitting layers.

[0102] For example, the sound-transmitting layer a3 of the second signal transceiver 12 (transducer a) transmits the ultrasonic signal to the first conduction 13 (sound-transmitting layer), and the first conduction 13 (sound-transmitting layer) transmits the ultrasonic signal to the second conduction part (sound-transmitting layer). The second conduction part (sound-transmitting layer) transmits the ultrasonic signal to the sound-transmitting layer a3 of the second signal transceiver (transducer a).

[0103] The sound-transmitting layer a3 of the first signal transceiver (transducer a) transmits the ultrasonic signal to the second conduction (sound-transmitting layer), and the second conduction (sound-transmitting layer) transmits the ultrasonic signal to the first conduction 13 (sound-transmitting layer). The first conduction 13 (sound-transmitting layer) transmits the ultrasonic signal to the sound-transmitting layer a3 of the first signal transceiver 12 (transducer a).

[0104] In the process of measuring the flow velocity, the first conductive part 13 can prevent the first signal transceiver part 12 from directly contacting the fluid to be measured, and the second conductive part can prevent the second signal transceiver part from directly contacting the fluid to be measured, thereby avoiding the risk of displacement or tilt of the first signal transceiver part 12 and the second signal transceiver part due to the flow velocity, or being hit by solid impurities, or being corroded by chemical substances.

[0105] Optionally, the second end 112 of the first fixing portion is provided with a screw hole, the first end 131 of the first conducting portion is provided with a thread, and the first end 131 of the first conducting portion is fixed by matching with the screw hole of the second end 112 of the first fixing portion through the thread.

[0106] The second end of the second fixing part is provided with a screw hole, the first end of the second conducting part is provided with a thread, and the first end of the second conducting part is matched and fixed with the screw hole of the second end of the second fixing part through the thread.

[0107] The thread may extend from the first end 131 of the first conductive part to the second end 132 of the first conductive part, and the thread may extend from the first end of the second conductive part to the second end of the second conductive part, which may enhance the fastening effect between the first conductive part 13 and the second conductive part.

[0108] During the flow rate measurement, the second end 132 of the first conductive part can be inserted through the second end 112 of the first fixed part into the interior of the first fixed part 11, so that the first end 131 of the first conductive part is fixedly connected to the second end 112 of the first fixed part. The second end of the second conductive part can be inserted through the second end of the second fixed part into the interior of the second fixed part, so that the first end of the second conductive part is fixedly connected to the second end of the second fixed part.

[0109] Then, the first conducting part 13 and the first fixing part 11 are inserted into the flow channel 200 to be measured, so that the first end 131 of the first conducting part contacts the fluid to be measured, and the second end 112 of the first fixing part contacts the fluid to be measured. The second conducting part and the second fixing part are inserted into the flow channel 200 to be measured, so that the first end of the second conducting part contacts the fluid to be measured, and the second end of the second fixing part contacts the fluid to be measured.

[0110] During the flow rate measurement, the first end 131 of the first conductive part can be inserted into the flow channel 200 to be measured so that the first end 131 of the first conductive part contacts the fluid to be measured. The first end of the second conductive part can be inserted into the flow channel 200 to be measured so that the first end of the second conductive part contacts the fluid to be measured.

[0111] Then, the first end 121 of the first signal transceiver is fixed by threading with the screw hole of the first end 111 of the first fixing part, and the first end of the second signal transceiver is fixed by threading with the screw hole of the first end of the second fixing part.

[0112] Then, the second end 112 of the first fixing part is passed through the second end 132 of the first conducting part, so that the first end 131 of the first conducting part is fixed by screw thread and matched with the screw hole of the second end 112 of the first fixing part, that is, the first fixing part 11 together with the first signal transceiver part 12 is fixed by screw thread and matched with the first conducting part 13. The second end of the second fixing part is passed through the second end of the second conducting part, so that the first end of the second conducting part is fixed by screw thread and matched with the screw hole of the second end of the second fixing part, that is, the second fixing part together with the second signal transceiver part is fixed by screw thread and matched with the second conducting part.

[0113] In this way, the first conducting part 13 and the second conducting part only need to be installed once without changing the contact fluid material. The first signal transceiver 12 and the second signal transceiver can also be installed while the fluid to be tested in the test channel 200 is continuously flowing.

[0114] Before the high-temperature and high-pressure fluid flows, the first fixing part 11 and the first conducting part 13 are arranged on one side of the flow channel 200 to be measured, and the second fixing part and the second conducting part are arranged on the other side of the flow channel 200 to be measured. After the fluid flows, when the first signal transceiver part 12 or the second signal transceiver part needs to be replaced, the fluid will not flow out of the flow channel.

[0115] Optionally, the first conducting part 13 and the second conducting part are both metal sound-transmitting layers. For example, the metal sound-transmitting layer can be a stainless steel plunger, etc. Preferably, the metal sound-transmitting layer can be a weakly attenuated sound-transmitting layer.

[0116] It can be understood here that for a flow channel to be measured with a larger width and more impurities, the transmission of the ultrasonic signal will be greatly attenuated, resulting in unclear reception of the ultrasonic signal by the ultrasonic probe (or transducer a), resulting in measurement errors.

[0117] The present application propagates ultrasonic signals through the metal sound-transmitting layer, so that the attenuation of the ultrasonic signals is relatively small, thereby improving the receiving range and clarity of the ultrasonic signals, thereby improving the measurement accuracy of the flow velocity.

[0118] Optionally, a first coupling layer is provided between the second end 122 of the first signal transceiver unit and the second end 132 of the first conductive unit; and a second coupling layer is provided between the second end of the second signal transceiver unit and the second end of the second conductive unit.

[0119] Exemplarily, both the first coupling layer and the second coupling layer may be coupling agents.

[0120] Before installing the first signal transceiver 12, a coupling agent may be applied to the side surface of the second end 122 of the first signal transceiver 12 (i.e., the signal transceiver surface of the first signal transceiver 12), so that after installing the first signal transceiver 12, the coupling agent contacts the side surface of the second end 132 of the first conductive part. A coupling agent may be applied to the side surface of the second end of the second signal transceiver 12 (i.e., the signal transceiver surface of the second signal transceiver), so that after installing the second signal transceiver, the coupling agent contacts the side surface of the second end of the second conductive part.

[0121] The first coupling layer can exclude air between the second end 122 of the first signal transceiver and the second end 132 of the first conductive part. The second coupling layer can exclude air between the second end of the second signal transceiver and the second end of the second conductive part. Since the resistance of the sound wave signal propagating in the air is relatively large, the first coupling layer and the second coupling layer can be provided to prevent the ultrasonic signal from propagating in the air.

[0122] Optionally, the flow velocity measurement device 100 includes at least two flow velocity measurement groups 10. The flow velocity measurement group 10 includes a first flow velocity measurement unit 1 and a second flow velocity measurement unit 2.

[0123] See also Figure 8 The flow rate measurement system includes a flow rate measurement device 100 including five flow rate measurement groups 10. The five flow rate measurement groups 10 are respectively fixed at different heights of the flow channel 200 to be measured. After receiving the electrical signal of each group of flow rate measurement groups 10, the signal processing unit 3 calculates the flow rate of the fluid to be measured at the height of each group of flow rate measurement groups 10, and then the signal processing unit 3 can also calculate the flow rate of the cross section of the fluid to be measured according to the following formula:

[0124] Q = ∫v i( z ) ·bzdz;

[0125] Wherein, i is the i-th flow velocity measurement group 10; z is the height of the cross section of the fluid to be measured where different flow velocity measurement groups 10 are located; v i (z) is the flow velocity corresponding to the i-th group of flow velocity measurement group 10 at height z; b(z) is the cross-sectional width of the fluid to be measured corresponding to height z; Q is the flow rate of the cross-sectional area of ​​the fluid to be measured.

[0126] In the process of measuring the flow velocity, the flow velocity of the fluid to be measured in the flow channel 200 to be measured is not uniformly distributed, and different flow velocity measurement groups 10 can be arranged at different heights of the flow channel 200 to be measured, thereby forming a multi-layer channel arrangement.

[0127] According to another aspect of the present application, the present application provides a flow velocity measurement device, which includes a first flow velocity measurement unit, a second flow velocity measurement unit, and a signal processing unit.

[0128] According to an exemplary embodiment, the first flow rate measuring unit and the second flow rate measuring unit are relatively fixedly arranged on both sides of the flow channel to be measured. The first flow rate measuring unit and the second flow rate measuring unit are arranged in parallel and on the same straight line. There is a preset angle θ between the first flow rate measuring unit and the flow channel to be measured. The range of the preset angle θ can be 0°<θ<180°.

[0129] For example, the preferred range of the preset angle θ may be: 45°<θ<75° or 105°<θ<135°. When the preset angle θ is within the preferred range, the flow rates of the fluid to be measured are clearly different, and the industrial process is simple and easy to process.

[0130] According to an example embodiment, the flow channel to be measured may be a long straight flow channel with a certain length, a regular cross section, and a constant front and rear cross section.

[0131] According to example embodiments, the first flow rate measurement unit includes a first fixing portion, a first signal transceiving portion, and a first conducting portion.

[0132] The first fixing portion is a cavity structure with openings at both ends.

[0133] For example, the first fixing portion may be a cylindrical tubular structure.

[0134] The first end of the first fixing part is arranged outside the flow channel to be measured, the second end of the first fixing part is inserted into the flow channel to be measured, and the second end of the first fixing part does not contact the fluid to be measured in the flow channel to be measured.

[0135] The first signal transceiver is disposed inside the cavity structure of the first fixing part and is fixedly connected to the first fixing part. The first end of the first signal transceiver is fixedly connected to the first end of the first fixing part.

[0136] For example, the first end of the first fixing portion is provided with a screw hole, the first end of the first signal transceiver portion is provided with a thread, and the first end of the first signal transceiver portion is fixed by matching with the screw hole of the first end of the first fixing portion through the thread.

[0137] The first conducting part is arranged at one side of the flow channel to be measured, the second end of the first conducting part is detachably connected to the second end of the first fixing part, and the first end of the first conducting part is in contact with the fluid to be measured.

[0138] For example, the second end of the first fixing portion is provided with a screw hole, the second end of the first conducting portion is provided with a thread, and the second end of the first conducting portion is fixed by matching with the screw hole of the second end of the first fixing portion through the thread. The length of the thread provided at the second end of the first conducting portion can extend to the middle of the first conducting portion, and the length of the thread can also be close to the first end of the first conducting portion.

[0139] The signal processing unit is electrically connected to the first signal transceiver.

[0140] For example, the signal processing unit sends an electrical signal to the first signal transceiver. After receiving the electrical signal, the first signal transceiver converts the electrical signal into a sound wave signal (e.g., an ultrasonic wave signal). The first signal transceiver can also convert the received sound wave signal into an electrical signal, and the first signal transceiver sends the electrical signal to the signal processing unit.

[0141] The signal processing unit may be a client device (such as a host, etc.) having data processing capabilities.

[0142] According to an exemplary embodiment, the second flow rate measurement unit includes a second fixing part, a second signal transceiver part, and a second conducting part. The second fixing part has the same structure as the first fixing part, the second signal transceiver part has the same structure as the first signal transceiver part, and the second conducting part has the same structure as the first conducting part.

[0143] The second fixing portion is a cavity structure with openings at both ends.

[0144] For example, the second fixing portion may be a cylindrical tubular structure.

[0145] The first end of the second fixing part is arranged outside the flow channel to be measured, the second end of the second fixing part is inserted into the flow channel to be measured, and the second end of the second fixing part does not contact the fluid to be measured in the flow channel to be measured.

[0146] The second signal transceiver is disposed inside the cavity structure of the second fixing part and is fixedly connected to the second fixing part. The first end of the second signal transceiver is fixedly connected to the first end of the second fixing part.

[0147] For example, the first end of the second fixing portion is provided with a screw hole, the first end of the second signal transceiver portion is provided with a thread, and the first end of the second signal transceiver portion is fixed by matching with the screw hole of the first end of the second fixing portion through the thread.

[0148] The second conducting part is arranged at the other side of the flow channel to be measured, the second end of the second conducting part is detachably connected to the second end of the second fixing part, and the first end of the second conducting part is in contact with the fluid to be measured.

[0149] For example, the second end of the second fixing portion is provided with a screw hole, the second end of the second conducting portion is provided with a thread, and the second end of the second conducting portion is fixed by matching the screw hole of the second end of the second fixing portion with the thread. The length of the thread provided at the second end of the second conducting portion can extend to the middle of the second conducting portion, and the length of the thread can also be close to the first end of the second conducting portion. The signal processing unit is electrically connected to the second signal transceiver.

[0150] For example, the signal processing unit sends an electrical signal to the second signal transceiver. After receiving the electrical signal, the second signal transceiver converts the electrical signal into a sound wave signal (e.g., an ultrasonic wave signal). The second signal transceiver can also convert the received sound wave signal into an electrical signal, and the second signal transceiver sends the electrical signal to the signal processing unit.

[0151] Exemplarily, the first signal transceiver and the second signal transceiver may both be transducers. The first conductive part and the second conductive part may both be sound-transmitting layers. The sound-transmitting layer may be a metal sound-transmitting layer. For example, the metal sound-transmitting layer may be a stainless steel plunger, etc. Preferably, the metal sound-transmitting layer may be a weakly attenuated sound-transmitting layer.

[0152] In the process of measuring flow velocity, the first conductive part can prevent the first signal transceiver part from directly contacting the fluid to be measured, and the second conductive part can prevent the second signal transceiver part from directly contacting the fluid to be measured, thereby avoiding the risk of displacement or tilt of the first signal transceiver part and the second signal transceiver part due to the influence of flow velocity, or being hit by solid impurities, or being corroded by chemical substances.

[0153] Exemplarily, the measurement process of the first flow rate measurement unit 1 and the second flow rate measurement unit 2 may be:

[0154] During the measurement process, the first conductive part can be first fixed to one side of the flow channel to be measured, that is, the first end of the first conductive part can be first inserted into the flow channel to be measured and then fixed by welding, so that the first end of the first conductive part contacts the fluid to be measured. The second conductive part can be fixed to the other side of the flow channel to be measured, that is, the first end of the second conductive part can be inserted into the flow channel to be measured and then fixed by welding, so that the first end of the second conductive part contacts the fluid to be measured.

[0155] Then, the second end of the first fixing part is passed through the second end of the first conducting part, so that the second end of the first conducting part is fixed by the screw thread and the screw hole of the second end of the first fixing part, (that is, the first fixing part together with the first signal transceiver part are fixed to the first conducting part.) The second end of the second fixing part is passed through the second end of the second conducting part, so that the second end of the second conducting part is fixed by the screw thread and the screw hole of the second end of the second fixing part, (that is, the second fixing part together with the second signal transceiver part are fixed to the second conducting part.

[0156] ) The signal processing unit simultaneously sends an electrical signal to the first signal transceiver and the second signal transceiver. After receiving the electrical signal, the first signal transceiver converts the electrical signal into an ultrasonic signal. After receiving the electrical signal, the second signal transceiver converts the electrical signal into an ultrasonic signal.

[0157] The first signal transceiver sends the ultrasonic signal to the second signal transceiver, and at the same time, the second signal transceiver sends the ultrasonic signal to the first signal transceiver.

[0158] Since the first flow velocity measuring unit and the second flow velocity measuring unit are correspondingly arranged on both sides of the flow channel to be measured, the ultrasonic signal emitted by the first signal transceiver is transmitted downstream, and the ultrasonic signal emitted by the second signal transceiver is transmitted upstream.

[0159] After receiving the ultrasonic signal transmitted by the second signal transceiver, the first signal transceiver converts the ultrasonic signal into an electrical signal, and transmits the electrical signal to the signal processing unit.

[0160] After receiving the ultrasonic signal transmitted by the first signal transceiver, the second signal transceiver converts the ultrasonic signal into an electrical signal and sends the electrical signal to the signal processing unit.

[0161] After the signal processing unit receives the electrical signal from the first signal transceiver unit and the electrical signal from the second signal transceiver unit, the signal processing unit can determine the propagation time difference of the ultrasonic signal in the downstream propagation and the upstream propagation according to the two different electrical signals. The signal processing unit can determine the flow rate of the fluid to be measured according to the propagation time difference of the ultrasonic signal in the downstream propagation and the upstream propagation.

[0162] For example, the signal processing unit can calculate the flow rate of the fluid to be measured according to the following formula:

[0163]

[0164] Among them, v is the flow velocity of the fluid to be measured; L is the distance of ultrasonic signal transmission, that is, the distance between the second end of the first signal transceiver part and the second end of the second signal transceiver part; θ is the angle between the propagation direction of the ultrasonic signal and the flow velocity v of the flow diagram to be measured (preset angle θ); c is the speed of sound in the stationary medium; △t is the propagation time difference of the ultrasonic signal in downstream propagation and upstream propagation.

[0165] After the process of measuring the flow velocity is completed, the first fixing part together with the first signal transceiver part can be disassembled from the first conducting part, thereby removing the first fixing part and the first signal transceiver part. The second fixing part together with the second signal transceiver part can be disassembled from the second conducting part, thereby removing the second fixing part and the second signal transceiver part.

[0166] Since the second fixing part has the same structure as the first fixing part, and the second signal transceiver has the same structure as the first signal transceiver, during the measurement process, the installation of the first fixing part and the first signal transceiver can be interchanged with the installation of the second fixing part and the second signal transceiver.

[0167] The first conducting portion and the second conducting portion may also be arranged on opposite sides of the flow channel to be measured during the construction of the flow channel to be measured.

[0168] Through the above-mentioned embodiments, the present application is detachably connected to the first fixed part through the first conducting part, and detachably connected to the second fixed part through the second conducting part, so that the first fixed part, the first signal transceiver part and the second fixed part, the second signal transceiver part can be disassembled and installed at any time.

[0169] In the present application, after the first flow velocity measuring unit and the second flow velocity measuring unit are installed on the flow channel to be measured, when the first fixing part, the first signal transceiver part and the second fixing part, and the second signal transceiver part need to be reinstalled (such as maintenance and repair), there is no need to disassemble the first conduction part and the second conduction part, thereby solving the problem of consistency of the propagation direction of the sound wave signal and the problem of consistency in the installation of the first fixing part, the first signal transceiver part, the second fixing part, and the second signal transceiver part.

[0170] The present application can arrange the first conducting part and the second conducting part on opposite sides of the flow channel to be measured in advance, and install the first fixing part, the first signal transceiver part, the second fixing part, and the second signal transceiver part while the fluid to be measured in the flow channel is continuously flowing.

[0171] Optionally, the flow velocity measurement device includes at least two flow velocity measurement groups. The flow velocity measurement group includes a first flow velocity measurement unit and a second flow velocity measurement unit.

[0172] At least two flow rate measurement groups are respectively fixed at different heights of the flow channel to be measured. After receiving the electrical signal of each flow rate measurement group, the signal processing unit calculates the flow rate of the fluid to be measured at the height of each flow rate measurement group, and the signal processing unit can also calculate the flow rate of the cross section of the fluid to be measured according to the following formula:

[0173] Q = ∫v i (z)·bzdz;

[0174] Where i is the i-th flow velocity measurement group; z is the height of the cross section of the fluid to be measured where different flow velocity measurement groups are located; v i (z) is the flow velocity corresponding to the i-th flow velocity measurement group with a height of z; b(z) is the cross-sectional width of the fluid to be measured corresponding to the height of z; Q is the flow rate of the cross-sectional area of ​​the fluid to be measured.

[0175] In the process of measuring the flow velocity, the flow velocity of the fluid to be measured in the flow channel to be measured is not uniformly distributed, and different flow velocity measurement groups can be arranged at different heights of the flow channel to be measured, thereby forming a multi-layer sound channel arrangement.

[0176] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions of the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A flow velocity measuring device, characterized in that: The flow velocity measuring device comprises a first flow velocity measuring unit, a second flow velocity measuring unit and a signal processing unit, wherein the first flow velocity measuring unit and the second flow velocity measuring unit are relatively fixedly arranged on both sides of the flow channel to be measured; The first flow rate measuring unit comprises: A first fixing part, wherein the first fixing part is a cavity structure with openings at both ends, the first fixing part is fixedly arranged at one side of the flow channel to be measured, the first end of the first fixing part is arranged outside the flow channel to be measured, the second end of the first fixing part is arranged inside the flow channel to be measured, and the second end of the first fixing part is in contact with the fluid to be measured in the flow channel to be measured; A first signal transceiver is disposed inside the cavity structure of the first fixing part and is detachably connected to the first fixing part, and a first end of the first signal transceiver is detachably connected to the first end of the first fixing part, and a second end of the first signal transceiver contacts the fluid to be measured through the second end of the first fixing part; The signal processing unit is electrically connected to the first signal transceiver; The second flow rate measurement unit comprises a second fixing part and a second signal transceiver part, the second fixing part has the same structure as the first fixing part, and the second signal transceiver part has the same structure as the first signal transceiver part; The signal processing unit is electrically connected to the second signal transceiver.

2. The flow velocity measuring device according to claim 1, characterized in that: The first flow rate measurement unit also includes: A first conducting part, wherein a first end of the first conducting part is detachably connected to a second end of the first fixing part, and the first end of the first conducting part is in contact with the fluid to be measured; The second flow rate measurement unit further includes a second conducting part, a first end of the second conducting part is detachably connected to a second end of the second fixing part, and a first end of the second conducting part is in contact with the fluid to be measured.

3. The flow velocity measuring device according to claim 1, characterized in that: The first signal transceiver unit and the second signal transceiver unit are both transducers.

4. The flow velocity measuring device according to claim 2, characterized in that: The first conducting part and the second conducting part are both sound-transmitting layers.

5. The flow velocity measuring device according to claim 4, characterized in that: The first conducting part and the second conducting part are both metal sound-transmitting layers.

6. The flow velocity measuring device according to claim 1, characterized in that: The first end of the first fixing portion is provided with a screw hole, the first end of the first signal transceiver portion is provided with a thread, and the first end of the first signal transceiver portion is fixed by matching with the screw hole of the first end of the first fixing portion through the thread; The first end of the second fixing part is provided with a screw hole, the first end of the second signal transceiver part is provided with a thread, and the first end of the second signal transceiver part is fixed by matching with the screw hole of the first end of the second fixing part through the thread.

7. The flow velocity measuring device according to claim 2, characterized in that: The second end of the first fixing portion is provided with a screw hole, the first end of the first conducting portion is provided with a thread, and the first end of the first conducting portion is matched and fixed with the screw hole of the second end of the first fixing portion through the thread; The second end of the second fixing portion is provided with a screw hole, the first end of the second conducting portion is provided with a thread, and the first end of the second conducting portion is matched and fixed with the screw hole of the second end of the second fixing portion through the thread.

8. The flow velocity measuring device according to claim 4, characterized in that: A first coupling layer is provided between the second end of the first signal transceiver unit and the second end of the first conductive unit; A second coupling layer is disposed between the second end of the second signal transceiver portion and the second end of the second conductive portion.

9. The flow velocity measuring device according to any one of claims 1 to 8, characterized in that: The flow rate measuring device comprises at least two flow rate measuring groups; The flow rate measurement group includes the first flow rate measurement unit and the second flow rate measurement unit.

10. A flow velocity measuring device, characterized in that: The flow velocity measuring device comprises a first flow velocity measuring unit, a second flow velocity measuring unit and a signal processing unit, wherein the first flow velocity measuring unit and the second flow velocity measuring unit are relatively fixedly arranged on both sides of the flow channel to be measured; The first flow rate measuring unit comprises: A first fixing part, wherein the first fixing part is a cavity structure with openings at both ends, the first end of the first fixing part is arranged outside the flow channel to be measured, the second end of the first fixing part is inserted into the flow channel to be measured, and the second end of the first fixing part does not contact the fluid to be measured in the flow channel to be measured; A first signal transceiver unit is disposed inside the cavity structure of the first fixing unit and is fixedly connected to the first fixing unit, and a first end of the first signal transceiver unit is fixedly connected to a first end of the first fixing unit; A first conducting part is disposed at one side of the flow channel to be measured, a second end of the first conducting part is detachably connected to the second end of the first fixing part, and a first end of the first conducting part is in contact with the fluid to be measured; The signal processing unit is electrically connected to the first signal transceiver; The second flow rate measurement unit includes a second fixing part, a second signal transceiver part and a second conducting part, the second fixing part has the same structure as the first fixing part, the second signal transceiver part has the same structure as the first signal transceiver part, and the second conducting part has the same structure as the first conducting part; The signal processing unit is electrically connected to the second signal transceiver.

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