Energy converter for NB remote transmission ultrasonic gas meter

Abstract

The utility model relates to the field of ultrasonic gas meters, in particular to a transducer for an NB remote transmission ultrasonic gas meter, which comprises a flow channel body, gas passes through the flow channel body, and at least two transducer groups are mounted on the flow channel body through connecting components. The at least two transducer sets each comprise a transmitting transducer and a receiving transducer, the transmitting transducer and the receiving transducer in the same transducer set are located on the two sides of the flow channel body correspondingly, and the transmitting transducer and the receiving transducer are arranged on the same side of the flow channel body at the same time. The transmitting transducer is used for transmitting ultrasonic waves into the flow channel body, the receiving transducer is used for receiving the ultrasonic waves in the flow channel body, the problem that in a traditional mode, the matching difficulty of paired transducers is high is solved, and the effect of reducing the matching difficulty of the paired transducers can be achieved.

Description

Technical Field

[0001] The present application relates to the field of ultrasonic gas meters, and in particular to a transducer for an NB remote transmission ultrasonic gas meter. Background Art

[0002] A transducer refers to a device that converts electrical energy and acoustic energy into each other, and is an important component in an NB remote transmission ultrasonic gas meter.

[0003] Currently, conventional paired transducers need to both transmit and receive, and the two paired transducers require parameters such as frequency, phase angle, and impedance to be exactly matched in order to accurately measure gas using ultrasonic waves. However, transducers for different uses have different requirements for performance parameters. Therefore, it is very difficult to completely pair the two transducers, which easily leads to inaccurate subsequent gas measurement. Utility Model Content

[0004] In order to reduce the pairing difficulty of transducers, the present application provides a transducer for an NB remote transmission ultrasonic gas meter.

[0005] The present application provides a transducer for an NB remote transmission ultrasonic gas meter, adopting the following technical solutions:

[0006] A transducer for an NB remote transmission ultrasonic gas meter includes a flow channel body for gas to pass through. At least two groups of transducer groups are installed on the flow channel body through connection components. Each of the at least two groups of transducer groups includes a transmitting transducer and a receiving transducer. The transmitting transducer and the receiving transducer in the same group of transducer groups are respectively located on both sides of the flow channel body, and both a transmitting transducer and a receiving transducer exist on the same side of the flow channel body. The transmitting transducer is used to transmit ultrasonic waves into the flow channel body, and the receiving transducer is used to receive ultrasonic waves in the flow channel body.

[0007] By adopting the above technical solutions, at least two groups of transducer groups are installed on the side wall of the flow channel body through connecting pieces, and the transmitting transducer and the receiving transducer in the same group of transducer groups are respectively arranged on both sides of the flow channel body, so that the transmitting transducer in the same group of transducer groups can transmit ultrasonic waves into the flow channel body from one side of the flow channel body, and the ultrasonic waves are received by the receiving transducer in the same group of transducer groups. The transmitting transducer is only responsible for transmitting ultrasonic waves, and the receiving transducer is only responsible for receiving ultrasonic waves, thereby facilitating the reduction of the pairing difficulty between the transmitting transducer and the receiving transducer. At the same time, the transmitting transducer in other groups of transducer groups transmits ultrasonic waves into the flow channel body from the other side of the flow channel body, and the ultrasonic waves are received by the receiving transducer in other groups of transducer groups, thereby facilitating the accurate measurement of the gas in the flow channel body.

[0008] In a specific feasible implementation, at least two groups of the transducer groups are arranged on the side wall of the flow channel body along the axis in the horizontal direction of the flow channel body, and the transmitting transducers and receiving transducers in different transducer groups are both located on the same horizontal plane.

[0009] By adopting the above technical solution, by arranging at least two groups of transducer groups in the horizontal direction, it is convenient to measure the gas flow rate along the traveling route of the gas by the transducer groups.

[0010] In a specific feasible implementation, at least two groups of the transducers are arranged on the side wall of the flow channel body in the vertical direction, and the transmitting transducers and receiving transducers in different transducer groups are both located on the same vertical plane.

[0011] By adopting the above technical solution, by arranging at least two groups of transducers in the vertical direction, it is convenient to measure the gas throughput in the flow channel body at the same moment.

[0012] In a specific feasible implementation, at least two groups of installation pipe groups are provided on the side wall of the flow channel body. At least two groups of the installation pipe groups correspond to at least two groups of transducer groups, and each group of installation pipe groups includes two installation pipes. The transmitting transducer or the receiving transducer is installed in the installation pipe through a connection component.

[0013] By adopting the above technical solution, by providing the installation pipes, it is convenient to install the transmitting transducers and receiving transducers and convenient for later maintenance.

[0014] In a specific feasible implementation, the connection component includes a quick-release part. The quick-release part includes a positioning cover. The positioning cover is used to be sleeved on the end of the installation pipe, and the positioning cover is also used to limit the transducer in the installation pipe. Positioning columns are provided on the inner side wall of the positioning cover, and positioning grooves for inserting the positioning columns are provided on the circumferential side wall of the installation pipe. The positioning grooves are L-shaped, and the straight section of the positioning groove extends from the end of the installation pipe to the direction of the flow channel body along the axis of the installation pipe. The arc section of the positioning groove is arranged along the circumferential direction of the installation pipe, and the arc section of the positioning groove is used to limit the positioning columns.

[0015] By adopting the above technical solution, by embedding the transmitting transducer or the receiving transducer at the end of one of the installation pipes, then inserting the positioning column of the positioning cover into the straight section of the positioning groove, and pushing the positioning cover towards the direction of the flow channel body, so that the positioning column slides into the arc section of the positioning groove, and then rotating the positioning cover to drive the positioning column to slide towards the end of the arc section of the positioning groove, thereby positioning the positioning cover on the installation pipe, so as to conveniently position the transmitting transducer or the receiving transducer installed in the installation pipe through the positioning cover.

[0016] In a specific feasible implementation, a limiting block is provided on the inner wall of the arc section of the positioning groove on the side far from the runner body. The limiting block is used to limit the positioning post, and a gap for the positioning post to pass through is left between the limiting block and the side wall of the arc section of the positioning groove close to the runner body.

[0017] By adopting the above technical solution, when rotating the positioning cover, the positioning post in the positioning cover is made to cross the limiting block, so as to limit the positioning post through the limiting block, thereby facilitating the stable installation of the positioning cover on the installation pipe.

[0018] In a specific feasible implementation, the connection assembly further includes a jacking member. The jacking member includes a jacking ring and a jacking spring. The jacking ring is sleeved on the installation pipe, and a sliding ring is provided on the inner wall of the jacking ring. A ring groove for the sliding ring to slide is provided on the side wall of the installation pipe. The ring groove is arranged along the axial direction of the installation pipe. The jacking spring is installed in the ring groove and is also connected to the jacking ring. One end of the jacking ring far from the jacking spring is used to abut against the end of the positioning cover.

[0019] By adopting the above technical solution, when installing the positioning cover on the installation pipe, the end of the positioning cover is made to push the jacking ring to compress the jacking spring. After the positioning post on the positioning cover crosses the limiting block, the jacking spring is used to push the jacking ring, so that the jacking ring pushes the positioning cover in the direction away from the runner body, thereby making the positioning post abut against the inner wall of the positioning groove, so that the positioning cover remains stationary at the current position.

[0020] In a specific feasible implementation, a plurality of flow rectifying sheets are further installed in the runner body. The plurality of flow rectifying sheets are arranged in the runner body along the axis perpendicular to the length direction of the runner body.

[0021] By adopting the above technical solution, by arranging the flow rectifying sheets, when the gas flows through the runner body, the gas flow is made to be stable through the flow rectifying sheets.

[0022] In summary, the present application includes at least one of the following beneficial effects:

[0023] 1. By arranging at least two groups of transducer groups in the present application, the transmitting transducers therein are only responsible for transmitting ultrasonic waves, and the receiving transducers are only responsible for receiving ultrasonic waves, thereby facilitating the reduction of the pairing difficulty between different transducers, and thus facilitating the measurement of gas.

[0024] 2. By arranging the connection assembly in the present application, it is convenient to limit the transmitting transducer and the receiving transducer through the connection assembly, and it is convenient to maintain the transmitting transducer and the receiving transducer by disassembling the connection assembly later. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic installation diagram of the transducer for the NB remote ultrasonic gas meter of this application.

[0026] Figure 2 It is a schematic installation diagram of the transducer group in the embodiment of this application.

[0027] Figure 3 It is a schematic installation diagram of the installation pipe group in another embodiment of this application.

[0028] Figure 4 It is a schematic installation diagram of the transducer group in another embodiment of this application.

[0029] Figure 5 It is an exploded view of the connection component in the embodiment of this application.

[0030] Figure 6 It is a cross-sectional view of the positioning cover in the embodiment of this application.

[0031] Explanation of reference numerals:

[0032] 1. Runner body; 21. First pipe group; 211. First installation pipe; 2111. Positioning groove; 2112. Ring groove; 2113. Limiting block; 22. Second pipe group; 221. Second installation pipe; 31. First transducer group; 311. First transmitting transducer; 312. First receiving transducer; 32. Second transducer group; 321. Second transmitting transducer; 322. Second receiving transducer; 4. Connection component; 411. Positioning cover; 412. Positioning post; 421. Lifting ring; 422. Sliding ring; 423. Lifting spring; 5. Rectifying piece. Detailed implementation manners

[0033] The following further elaborates on this application with reference to the accompanying drawings.

[0034] The embodiment of this application discloses a transducer for an NB remote ultrasonic gas meter. Referring to Figure 1 and Figure 2 , it includes a runner body 1. An air inlet is provided at one end of the runner body 1, and an air outlet is provided at the other end. At least two groups of installation pipe groups are provided on the runner body 1. Each group of installation pipe groups includes two installation pipes. In this application, two groups of installation pipe groups are used for illustration, and they are respectively defined as the first pipe group 21 and the second pipe group 22. The two installation pipes in the first pipe group 21 are defined as the first installation pipes 211, and the two installation pipes in the second pipe group 22 are defined as the second installation pipes 221. And the two first installation pipes 211 are respectively located on both sides of the axis of the runner body 1, and the two second installation pipes 221 are also respectively located on both sides of the axis of the runner body 1. Moreover, the first installation pipes 211 and the second installation pipes 221 are both communicated with the inside of the runner body 1.

[0035] Referring to Figure 1 andFigure 2 There are also at least two sets of transducer groups provided on the runner body 1. Each set of transducer groups includes a transmitting transducer and a receiving transducer. In this application, two sets of transducer groups are used for illustration. For the convenience of description, in this embodiment, they are respectively defined as the first transducer group 31 and the second transducer group 32. The transmitting transducer and the receiving transducer in the first transducer group 31 are defined as the first transmitting transducer 311 and the first receiving transducer 312, and the transmitting transducer and the receiving transducer in the second transducer group 32 are defined as the second transmitting transducer 321 and the second receiving transducer 322. The first transducer group 31 corresponds to the first pipe group 21, and the second transducer group 32 corresponds to the second pipe group 22. The first transducer group 31 includes the first transmitting transducer 311 and the first receiving transducer 312, and the second transducer group 32 includes the second transmitting transducer 321 and the second receiving transducer 322. The first transmitting transducer 311 and the first receiving transducer 312 in the first transducer group 31 are respectively installed in two first installation pipes 211 in the first pipe group 21 through the connection assembly 4, and the second transmitting transducer 321 and the second receiving transducer 322 are respectively installed in two second installation pipes 221 in the second pipe group 22 through the connection assembly 4. In this application, for the transmitting transducer, it is only responsible for transmitting ultrasonic waves, and it is required that the transducer has a large output power, a high energy conversion efficiency, and a high directivity; while for the receiving transducer, it is only responsible for receiving ultrasonic waves, and it is required to have a wide frequency band, a high sensitivity, and a high resolution, etc. The specific selection and working principle of the transducer are the prior art in this field and will not be elaborated here.

[0036] Refer to Figure 2 As shown in the figure, the first pipe group 21 and the second pipe group 22 are horizontally arranged on the side wall of the runner body 1 along the axial direction of the runner body 1. The two first installation pipes 211 in the first pipe group 21 are respectively located on both sides of the axis of the runner body 1. The two second installation pipes 221 in the second pipe group 22 are also respectively located on both sides of the axis of the runner body 1. The first installation pipes 211 and the second installation pipes 221 are arranged along the axis of the runner body 1 and are located on the same horizontal plane. The first transmitting transducer 311 in the first transducer group 31 is installed in one of the first installation pipes 211 in the first pipe group 21 through the connection assembly 4, and the first receiving transducer 312 is also installed in the other first installation pipe 211 in the first pipe group 21 through the connection assembly 4. The second transmitting transducer 321 in the second transducer group 32 is installed in one of the second installation pipes 221 in the second pipe group 22 through the connection assembly 4, and the second transmitting transducer 321 and the first receiving transducer 312 in the first transducer group 31 are located on the same side. The second receiving transducer 322 is also installed in the other installation pipe in the second pipe group 22 through the connection assembly 4, and the second receiving transducer 322 and the first transmitting transducer 311 in the first transducer group 31 are located on the same side.

[0037] Referring to Figure 3 and Figure 4 In another embodiment of the present application, the first tube group 21 and the second tube group 22 are arranged on the side wall of the flow channel body 1 in the vertical direction, and the two first installation tubes 211 in the first tube group 21 are respectively located on both sides of the axis of the flow channel body 1. The two second installation tubes 221 in the second tube group 22 are also respectively located on both sides of the axis of the flow channel body 1, and the first installation tube 211 and the second installation tube 221 on the same side of the flow channel body 1 are located in the same vertical plane. The first transmitting transducer 311 in the first transducer group 31 is installed in one of the first installation tubes 211 in the first tube group 21 through the connecting component 4, and the first receiving transducer 312 is also installed in the other first installation tube 211 in the first tube group 21 through the connecting component 4. The second transmitting transducer 321 in the second transducer group 32 is installed in one of the second installation tubes 221 in the second tube group 22 through the connecting component 4, and the second transmitting transducer 321 and the receiving transducer in the first transducer group 31 are located on the same side of the flow channel body 1. The second receiving transducer 322 is also installed in the other second installation tube 221 in the second tube group 22 through the connecting component 4, and the second receiving transducer 322 and the first transmitting transducer 311 in the first transducer group 31 are located on the same side of the flow channel body 1.

[0038] Referring to Figure 2 and Figure 4 The first transmitting transducer 311 in the first transducer group 31 emits ultrasonic waves into the flow channel body 1 from one side of the flow channel body 1, and the first receiving transducer 312 receives the ultrasonic waves, so that a set of flight times of the ultrasonic waves can be obtained. The second transmitting transducer 321 in the second transducer group 32 sends ultrasonic waves into the flow channel body 1 from the other side of the flow channel body 1, and the second receiving transducer 322 receives the ultrasonic waves, so that another set of flight times of the ultrasonic waves can be obtained, thus facilitating the measurement of the ultrasonic waves. The specific measurement method and measurement principle are the prior art in this field and will not be elaborated here.

[0039] Referring to Figure 4 and Figure 5 The connecting component 4 includes a quick-release part and a jacking part. The quick-release part includes a positioning cover 411. A plurality of positioning covers 411 are provided and are respectively used to sleeved on the ends of the two first installation tubes 211 and the two second installation tubes 221. Here, taking the positioning cover 411 installed on the first installation tube 211 as an example for illustration, a positioning column 412 is fixedly installed on the inner wall of the positioning cover 411. The axis of the positioning column 412 is perpendicular to the axis of the positioning rod, and one end of the positioning column 412 also extends towards the axis of the positioning cover 411. Referring to Figure 5 and Figure 6, an installation groove for installing a transmitting transducer or a receiving transducer is provided on the inner side wall of the end of the first installation pipe 211. A positioning groove 2111 for inserting the positioning post 412 is provided on the outer side wall of the end of the first installation pipe 211. The positioning groove 2111 is L-shaped, and the straight section of the positioning groove 2111 is arranged along the axial direction of the first installation pipe 211, and the straight section extends from the end of the first installation pipe 211 towards the flow channel body 1. The arc section of the positioning groove 2111 is arranged along the circumferential direction of the first installation pipe 211. A limiting block 2113 is fixedly installed on the side wall of the arc section of the positioning groove 2111 close to the end of the first installation pipe 211. The limiting block 2113 is used to limit the positioning post 412, and a gap for the positioning post 412 to pass through is left between the limiting block 2113 and the side wall of the arc section of the positioning groove 2111 close to the flow channel body 1.

[0040] Refer to Figure 4 and Figure 5 , the jacking member includes a jacking ring 421 and a jacking spring 423. The jacking ring 421 is slidably installed on the first installation pipe 211 along the axial direction of the first installation pipe 211, and the jacking ring 421 is located between the positioning groove 2111 and the flow channel body 1. The end of the jacking ring 421 is used to abut against the positioning cover 411. A sliding ring 422 is fixedly installed on the inner wall of the inner ring of the jacking ring 421. A ring groove 2112 for the sliding ring 422 to slide is provided on the peripheral side wall of the first installation pipe 211. The jacking spring 423 is installed in the ring groove 2112, and one end of the jacking spring 423 abuts against the inner wall of the ring groove 2112, and the other end abuts against the side wall of the sliding ring 422.

[0041] Refer to, 4 and Figure 5, by installing the first transmitting transducer 311 or the first receiving transducer 312 into the first mounting pipe 211, and then sleeving the positioning cover 411 on the first mounting pipe 211, the first transmitting transducer 311 or the first receiving transducer 312 is limited. When sleeving the positioning cover 411 on the first mounting pipe 211, first align the positioning post 412 on the positioning cover 411 with the straight section of the positioning groove 2111 and insert it into the straight section of the positioning groove 2111, then push the positioning cover 411 towards the flow channel body 1, so that the positioning cover 411 drives the positioning post 412 to move to the arc section of the positioning groove 2111, causing the positioning rod to push the lifting ring 421 towards the flow channel body 1, so that the lifting ring 421 drives the slip ring 422 to compress the lifting spring 423. Then, by rotating the positioning cover 411, the positioning rod drives the positioning post 412 to slide along the arc section of the positioning groove 2111 until the positioning post 412 stops rotating after passing over the limiting block 2113. Thus, the limiting block 2113 limits the positioning post 412. And at this time, under the action of the lifting spring 423, the lifting ring 421 pushes the positioning cover 411 away from the flow channel body 1, so that the positioning cover 411 drives the positioning post 412 to abut against the side wall of the arc section of the positioning groove 2111 away from the flow channel body 1, so that the positioning post 412 remains stationary at the current position, thus keeping the positioning cover 411 sleeved on the mounting pipe, and thus realizing the positioning of the first transmitting transducer 311 or the first receiving transducer 312.

[0042] Refer to Figure 4 and Figure 5 , when maintenance of the first transmitting transducer 311 or the first receiving transducer 312 is required, by pushing the positioning cover 411 towards the flow channel body 1, the positioning post 412 moves towards the side wall of the arc section of the positioning groove 2111 close to the flow channel body 1. Then rotate the positioning cover 411 so that the positioning cover 411 drives the positioning post 412 to move towards the straight section of the positioning groove 2111 and pass over the limiting block 2113. When the positioning post 412 moves to the straight section of the positioning groove 2111, release the positioning cover 411, so that under the action of the lifting spring 423, the lifting ring 421 pushes the positioning cover 411 away from the flow channel body 1, so that the positioning cover 411 is separated from the mounting pipe, thus releasing the limit on the first transmitting transducer 311 or the first receiving transducer 312, and thus facilitating the maintenance of the first transmitting transducer 311 or the first receiving transducer 312.

[0043] Refer to Figure 4, a number of flow rectifying vanes 5 are also fixedly installed in the flow channel body 1. The number of flow rectifying vanes 5 are arranged vertically in the flow channel body 1, and both ends of each flow rectifying vane 5 are respectively fixedly connected to the side wall of the flow channel body 1 where the installation pipes are installed. The airflow flowing through the flow channel body 1 is stabilized by the number of flow rectifying vanes 5. The specific working principle of the flow rectifying vane 5 is the prior art in this field and will not be elaborated here.

[0044] The working principle of the embodiment of the present application is as follows: By installing the first transmitting transducer 311 and the first receiving transducer 312 in the corresponding first installation pipe 211, and installing the second transmitting transducer 321 and the second receiving transducer 322 in the corresponding second installation pipe 221, and positioning the first transmitting transducer 311, the first receiving transducer 312, the second transmitting transducer 321 and the second receiving transducer 322 through the connecting component 4. Then when there is gas passing through the flow channel body 1, ultrasonic waves are emitted into the flow channel body 1 from one side of the flow channel body 1 through the first transmitting transducer 311 and received by the first receiving transducer 312, and ultrasonic waves are emitted into the flow channel body 1 from the other side of the flow channel body 1 through the second transmitting transducer 321 and received by the second receiving transducer 322, so as to facilitate the metering of gas by ultrasonic waves.

[0045] The above is the preferred embodiment of the present application. It does not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A transducer for a NB remote ultrasonic gas meter, comprising a flow channel body (1), wherein the flow channel body (1) is used for gas to pass through, and characterized in that: At least two transducer groups are installed on the flow channel body (1) via a connecting assembly (4), and at least two of the transducer groups include a transmitting transducer and a receiving transducer. The transmitting transducer and the receiving transducer in the same transducer group are respectively located on two sides of the flow channel body (1), and the transmitting transducer and the receiving transducer are simultaneously present on the same side of the flow channel body (1). The transmitting transducer is used to transmit ultrasonic waves into the flow channel body (1), and the receiving transducer is used to receive ultrasonic waves in the flow channel body (1).

2. The transducer for NB remote ultrasonic gas meter according to claim 1 is characterized in that: At least two groups of the transducer groups are arranged on the side wall of the flow channel body (1) along the axis of the flow channel body (1) in the horizontal direction, and the transmitting transducers and receiving transducers in different transducer groups are located on the same horizontal plane.

3. The transducer for NB remote ultrasonic gas meter according to claim 1, characterized in that: At least two groups of transducers are arranged on the side wall of the flow channel body (1) along the vertical direction, and the transmitting transducers and receiving transducers in different transducer groups are located on the same vertical plane.

4. The transducer for NB remote ultrasonic gas meter according to claim 1, characterized in that: At least two groups of mounting tubes are provided on the side wall of the flow channel body (1), the at least two groups of mounting tubes corresponding to the at least two groups of transducer groups, and each group of mounting tubes includes two mounting tubes, and the transmitting transducer or the receiving transducer is installed in the mounting tube via a connecting component (4).

5. The transducer for NB remote ultrasonic gas meter according to claim 4 is characterized in that: The connection assembly (4) comprises a quick-release component, and the quick-release component comprises a positioning cover (411). The positioning cover (411) is used to be sleeved on the end of the mounting tube, and the positioning cover (411) is also used to limit the transducer in the mounting tube. A positioning column (412) is provided on the inner side wall of the positioning cover (411), and a positioning groove (2111) for the positioning column (412) to be inserted is provided on the peripheral side wall of the mounting tube. The positioning groove (2111) is L-shaped, and the straight section of the positioning groove (2111) extends from the end of the mounting tube to the direction of the flow channel body (1) along the axial direction of the mounting tube. The arc section of the positioning groove (2111) is arranged along the circumferential direction of the mounting tube, and the arc section of the positioning groove (2111) is used to limit the positioning column (412).

6. The transducer for NB remote ultrasonic gas meter according to claim 5, characterized in that: A limiting block (2113) is provided on the inner wall of the arc section of the positioning groove (2111) on the side away from the flow channel body (1), and the limiting block (2113) is used to limit the positioning column (412), and a gap is left between the limiting block (2113) and the side wall of the arc section of the positioning groove (2111) on the side close to the flow channel body (1) for the positioning column (412) to pass through.

7. The transducer for NB remote ultrasonic gas meter according to claim 5, characterized in that: The connecting assembly (4) further comprises a lifting member, the lifting member comprising a lifting ring (421) and a lifting spring (423), the lifting ring (421) being sleeved on the mounting tube, and a slip ring (422) being provided on the inner wall of the lifting ring (421), an annular groove (2112) for the slip ring (422) to slide being provided on the side wall of the mounting tube, the annular groove (2112) being arranged along the axial direction of the mounting tube, the lifting spring (423) being installed in the annular groove (2112), and the lifting spring (423) being further connected to the lifting ring (421), and an end of the lifting ring (421) away from the lifting spring (423) being used for contacting the end of the positioning cover (411).

8. The transducer for NB remote ultrasonic gas meter according to claim 1, characterized in that: A plurality of rectifying pieces (5) are also installed in the flow channel body (1), and the plurality of rectifying pieces (5) are arranged in the flow channel body (1) along an axis perpendicular to the length direction of the flow channel body (1).

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