Detection assembly and vortex shedding flowmeter

Abstract

The invention aims to provide a detection assembly and a vortex shedding flowmeter, the detection assembly comprises a probe, a piezoelectric element and a circuit board, and at least part of the piezoelectric element is installed in the probe; the detection assembly further comprises a lead and a contact pin, one end of the contact pin is welded to the circuit board, the other end of the contact pin is fixedly connected with the probe, and the lead is welded and fixed to the piezoelectric element and further welded and fixed to the contact pin. According to the detection assembly and the vortex shedding flowmeter, the reliability of connection between the piezoelectric element and the circuit board can be improved.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to a detection component and a vortex flowmeter. Background Art

[0002] like Figure 6 As shown, Figure 6 This is a structural schematic diagram of a vortex flowmeter.

[0003] The vortex flowmeter 1 includes a test pipe 2 and a bluff body 33 located in the test pipe 2, a probe 35, and a piezoelectric element 3 assembled in the probe 35. The upper end of the piezoelectric element 3 is arranged on the mounting seat 16, and two contact pins are provided, namely, a first contact pin 5 and a second contact pin 7. The two contact pins are connected to the positive and negative electrodes of the piezoelectric element 3, and then connected to the circuit board 9. A conductive socket 11 is provided on the circuit board 9, and an elastic compression spring is provided in the conductive socket 11 for pressing the contact pin. The contact pins and the piezoelectric element of the vortex flowmeter 1 of this structure are in a conflicting connection, and it is necessary for those skilled in the art to improve the connection reliability between the piezoelectric element and the circuit board as much as possible. Summary of the invention

[0004] The purpose of the present application is to provide a detection component and a vortex flowmeter, which can improve the reliability of the connection between the piezoelectric element and the circuit board.

[0005] The detection component provided in the present application includes a probe, a piezoelectric element and a circuit board, wherein at least a portion of the piezoelectric element is installed in the probe; the detection component also includes a lead and a pin, wherein one end of the pin is welded and connected to the circuit board, and the other end of the pin is fixedly connected to the probe, the lead is welded and fixed to the piezoelectric element, and the lead is also welded and fixed to the pin.

[0006] The present application also provides a vortex flowmeter, including a meter body, the meter body including a test pipe, a bluff body located in the test pipe, and a mounting portion located on the side of the test pipe; the mounting portion is provided with a mounting hole and a mounting cavity, one end of the mounting hole penetrates through the pipe wall of the test pipe to form an opening, and the other end of the mounting hole is connected to the mounting cavity; the vortex flowmeter also includes a detection component as described in any of the above items, part of the probe is located in the mounting hole, another part of the probe passes through the opening and is located inside the test pipe, and the circuit board is installed in the mounting cavity.

[0007] In the detection component in this application and the vortex flowmeter with this detection component, the piezoelectric element and the circuit board are connected by adding leads and pins. One end of the pin is welded to the circuit board, and the other end of the pin is fixedly connected to the probe. The lead is fixedly welded to the piezoelectric element and also welded to the pin, which can improve the connection reliability between the piezoelectric element and the circuit board and thus ensure... Description of the Drawings

[0008] Figure 1 Schematic structural diagram of the vortex flowmeter in the embodiment of this application;

[0009] Figure 2 is Figure 1 Bottom view inside the test pipe in...

[0010] Figure 3 is Figure 1 right view of...

[0011] Figure 4 is Figure 1 Schematic structural diagram of the probe in...

[0012] Figure 5 is Figure 1 Schematic structural diagram of the circuit board in...

[0013] Figure 6 Schematic structural diagram of a vortex flowmeter.

[0014] Figures 1 - 5 The description of the reference numerals in the drawings is as follows:

[0015] 1 - meter body; 101 - test pipe; 101a - lumen; 102 - installation part; 1021 - columnar body; 1021a - installation hole; 1021a1 - orifice; 10211 - second step surface; 1022 - housing structure; 1022a - installation cavity; 103 - bluff body; 104 - support part; 105 - positioning post; 106 - inlet; 107 - outlet;

[0016] 2 - sealing component;

[0017] 3 - piezoelectric element; 31 - first side; 32 - second side;

[0018] 4 - probe; 401 - first part; 4011 - first end face; 4012 - first step surface; 402 - second part; 4021 - arc wall; 4022 - secondary step surface; 403 - third part; 4a - second cavity; 4b - insertion hole; 4c - annular groove; 4d - first cavity;

[0019] 5 - circuit board; 5a - potting hole; 5b - positioning hole; 5c - pad;

[0020] 6 - pin;

[0021] 7 - lead wire;

[0022] Figure 6 The reference numerals in the drawings are explained as follows:

[0023] 1 - Vortex flowmeter; 2 - Test pipeline; 3 - Piezoelectric element; 35 - Probe; 5 - First contact pin; 7 - Second contact pin; 9 - Circuit board; 11 - Conductive socket; 33 - Bluff body; 16 - Mounting seat. Detailed implementation manners

[0024] To enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0025] Please refer to Figures 1 to 3 , Figure 1 which is a schematic structural diagram of the vortex flowmeter in the embodiment of the present application; Figure 2 is Figure 1 a bottom view of the inside of the test pipeline 101 in Figure 3 is Figure 1 a right view of , but only showing the body 1 of the vortex flowmeter.

[0026] The vortex flowmeter in this application includes a body 1, and the body 1 includes a test pipeline 101, a bluff body 103 located inside the test pipeline 101, and a mounting portion 102 located on the side of the test pipeline 101. Among them, the lumen 101a inside the test pipeline 101 can be used for the flow of the fluid to be tested, and the bluff body 103 is arranged inside the test pipeline 101, blocking the flow path of the fluid. As can be seen from Figure 2 the cross - section of the bluff body 103 along the length direction of the test pipeline 101 is approximately triangular. When the fluid flows in the test pipeline 101, it flows along the direction pointed by the tip of the triangle and is blocked when passing through the bluff body 103, and will bypass the bluff body 103.

[0027] In this embodiment, a mounting portion 102 is provided on the side of the test pipeline 101. As shown in Figure 1 , 3 , the mounting portion 102 is located on the upper side of the test pipeline 101. The mounting portion 102 is provided with a mounting hole 1021a and a mounting cavity 1022a. One end of the mounting hole 1021a penetrates through the pipe wall of the test pipeline 101 to form an opening 1021a1, that is, the opening 1021a1 communicates with the mounting hole 1021a and the inside of the lumen 101a of the test pipeline 101. The other end of the mounting hole 1021a communicates with the mounting cavity 1022a. Figure 1 , 3Among them, the mounting hole 1021a is located below the mounting cavity 1022a. The upper part of the mounting portion 102 is a housing structure 1022 with an upper-side opening. The housing cavity of the housing structure 1022 is the mounting cavity 1022a. A columnar body 1021 is connected to the bottom of the housing structure 1022. The mounting hole 1021a is opened in the columnar body 1021. One end of the columnar body 1021 is connected to the housing structure 1022, and the other end is connected to the pipe wall of the test pipe 101. The mounting portion 102 and the test pipe 101 can be detachably connected or integrally structured.

[0028] The vortex flowmeter further includes a detection assembly. The detection assembly includes a probe 4, a piezoelectric element 3, and a circuit board 5. At least part of the piezoelectric element 3 is installed in the probe 4. Figure 1 Among them, the piezoelectric element 3 is entirely installed inside the pressure head to protect and position the piezoelectric element 3. Among them, part of the probe 4 is located inside the above-mentioned mounting hole 1021a, and the other part of the probe 4 passes through the orifice 1021a1 and is located inside the test pipe 101. At least part of the piezoelectric element 3 is located in the part of the probe 4 inside the test pipe 101 so as to detect the fluid flowing inside the test pipe 101. The fluid flowing through the above-mentioned flow obstructer 103 flows towards the probe 4. Figure 2 Among them, the triangular tip of the flow obstructer 103 faces the probe 4. In addition, the circuit board 5 of the detection assembly is installed in the mounting cavity 1022a of the mounting portion 102.

[0029] When the fluid passes through the probe 4, the piezoelectric element 3 inside the probe 4 can detect the change of the fluid and needs to feedback to the circuit board 5, that is, a connection needs to be established between the circuit board 5 and the probe 4. It should be noted that in this embodiment, the detection assembly further includes a lead wire 7 and a pin 6. The pin 6 is connected to the circuit board 5, the lead wire 7 is welded to the piezoelectric element 3, and the lead wire 7 is also connected to the pin 6, that is, the piezoelectric element 3 is connected to the circuit board 5 through the lead wire 7 and the pin 6.

[0030] With such a setting, the lead wire 7 is welded to the piezoelectric element 3. Compared with the abutting connection method of the contact sheath in the background art, the welded connection is obviously more reliable. Moreover, the connection of the lead wire 7 is a flexible connection. During the detection process, when the fluid flows towards the probe 4 and impacts the probe 4, causing vibration, the flexible connection can reduce or even eliminate the impact of the vibration on the welded connection, thereby continuously maintaining the reliability of the welded connection. Furthermore, when connecting through the lead wire 7, the pin 6 is also provided at the same time. The pin 6 and the circuit board 5 can be directly plugged and connected. The connection method is simple and the assembly is relatively fast. Compared with the method of directly passing the lead wire 7 through the circuit board 5 for connection, it is obviously more efficient and easier to operate. And because the pin 6 is flexibly connected to the piezoelectric element 3 through the lead wire 7, even if the pin 6 is stressed during or after the plugging process with the circuit board 5, this force will not be transmitted to the piezoelectric element 3, thereby ensuring the detection performance and service life of the piezoelectric element 3.

[0031] As Figure 4 shown, Figure 4 Figure Figure 1 9 is a schematic structural diagram of the probe 4 in the [document], showing a half structure cut along the length direction of the probe 4.

[0032] In this embodiment, the probe 4 is provided with an insertion hole 4b. One end of the above-mentioned pin 6 is inserted into the insertion hole 4b to be fixedly connected to the probe 4, and the other end of the pin 6 is connected to the circuit board 5. Specifically, after the pin 6 is inserted into the circuit board 5, it is welded to the circuit board 5. Figure 1 In [document], the upper end of the pin 6 is inserted into the circuit board 5 above it, and the lower end of the pin 6 is inserted into the probe 4 below it. With such a setting, when the probe 4 is installed on the installation part 102, the position of the probe 4 is stable. After the pin 6 is inserted into the probe 4, the probe 4 can limit the position of the pin 6, which is convenient for the plugging connection with the circuit board 5. It can be seen that the pin 6 does not necessarily need to be connected to the probe 4. For example, the pin 6 can only be plugged and connected to the circuit board 5. However, the connection method with the probe 4 makes the pin 6 more stable, which is beneficial to improving the reliability of the plugging connection with the circuit board 5 and ensuring the reliability of the connection with the lead wire 7.

[0033] In addition, the piezoelectric element 3 in this embodiment includes a first side 31 and a second side 32 that are distributed oppositely, that is, Figure 1 the left side and the right side in [document]. One of the first side 31 and the second side 32 of the piezoelectric element 3 is the positive electrode of the piezoelectric element 3, and the other is the negative electrode of the piezoelectric element 3. The detection assembly includes two lead wires 7. One lead wire 7 is welded to the first side 31, and the other lead wire 7 is welded to the second side 32. The two lead wires 7 are respectively connected to the circuit board 5 through the corresponding pins 6. In this way, the positive electrode and the negative electrode of the piezoelectric element 3 can be connected to the circuit board 5 to establish the required circuit.

[0034] Among them, the distance between the first side 31 and the second side 32 of the piezoelectric element 3 is less than the distance between the two pins 6 corresponding to the two leads 7. Here, the distance mentioned refers to the distance in the direction perpendicular to the first side 31 and the second side 32. The distance between the two positions on the circuit board 5 connected to the pins 6 is also greater than the distance between the first side 31 and the second side 32. With such a setting, the distance between the two positions on the circuit board 5 connected to the pins 6 can be set to be relatively large, so that the circuit board 5 can be provided with pads 5c to connect to the pins 6, as Figure 5 shown Figure 5 is Figure 1 a schematic structural diagram of the circuit board 5 in

[0035] In the background art, the contact pins of the positive and negative electrodes on both sides of the piezoelectric element 3 directly extend upward to connect to the upper circuit board 5. Since the distance between the two contact pins is relatively close, it is difficult to provide two pads 5c with similar distances on the circuit board 5. Therefore, the solution adopted in the background art is to provide a conductive socket above the circuit board 5, and the conductive socket has an elastic compression spring inside for pressing the contact pins to keep the contact pins in contact connection with the circuit board 5. It can be seen that the setting method in this embodiment is to increase the distance between the pins 6, so that pads 5c can be provided on the circuit board 5. While realizing the reliable connection between the pins 6 and the circuit board 5, there is no need to provide a conductive socket, which simplifies the structure of the detection component. As Figure 1 shown, since the distance between the two pins 6 is relatively far, in order to realize the connection between the pins 6 and the piezoelectric element 3, the leads 7 extend obliquely from the position of the piezoelectric element 3 to the position connected to the pins 6. The inclination directions of the two leads 7 are symmetric with respect to the length direction of the piezoelectric element 3, and the two leads 7 are generally arranged in a V shape.

[0036] In this embodiment, the probe 4 has a first end face 4011 close to the circuit board 5, and the insertion hole 4b penetrates the first end face 4011. Figure 5 The first end face 4011 in

[0037] Looking again Figure 4 , the probe 4 in this embodiment includes a receiving cavity. The receiving cavity includes a first cavity 4d and a second cavity 4a connected in a first direction. The first cavity 4d forms an opening 1021a1 at one end of the probe 4 close to the circuit board 5, that is, it penetrates one end of the probe 4, so that the first end face 4011 of the probe 4 is annular. The dimension of the first cavity 4d in the second direction is greater than the dimension of the second cavity 4a in the second direction. The first direction is perpendicular to the second direction. The first direction is inFigure 4 The middle is in the up - down direction. The piezoelectric element 3 is located within the second cavity 4a. The second cavity 4a is set to have a relatively small size and is a relatively slender and narrow - hole structure, which can more reliably position the piezoelectric element 3, making the piezoelectric element 3 in a relatively stable state. While the first cavity 4d is set to have a relatively large size. After the lead wire 7 is connected to the piezoelectric element 3, it extends into the first cavity 4d. The first cavity 4d can provide sufficient space to allow the lead wire 7 to have a larger spacing within the first cavity 4d.

[0038] As Figure 4 shown, the probe 4 includes a first part 401, a second part 402, and a third part 403 that are connected in sequence. The three parts are connected in the first direction. The first direction is Figure 4 the up - down direction, which is also the length direction of the probe 4 or the piezoelectric element 3. The first cavity 4d is opened in the first part 401, and the second cavity 4a is jointly opened by the second part 402 and the third part 403. The first part 401, the second part 402, and the third part 403 gradually decrease in size in the second direction from top to bottom. Then, the outer peripheral wall of the probe 4 forms a two - stage stepped structure, including two stepped surfaces, namely the first - stage stepped surface and the second - stage stepped surface 4022. The first - stage stepped surface is the first stepped surface 4012. As Figure 3 shown, the wall of the mounting hole 1021a includes the second stepped surface 10211. As Figure 1 shown, after the probe 4 is installed, the second stepped surface 10211 and the first stepped surface 4012 are in contact with each other in the up - down direction to position the probe 4 and the mounting hole 1021a. In this way, when the pin 6 is installed and positioned on the probe 4, the probe 4 is supported and positioned on the second stepped surface 10211 of the mounting part 102. The force on the pin 6 can be directly transmitted to the mounting part 102, and the insertion connection with the circuit board 5 is easy to operate and relatively reliable. In addition, the third part 403 of the probe 4 is the most slender and is located inside the test pipe 101 to better sense the vibration of the fluid.

[0039] As Figure 4 shown, the wall at one end of the second cavity 4a close to the first cavity 4d includes an arc - shaped wall 4021. The arc - shaped wall 4021 smoothly connects the first cavity 4d and the second cavity 4a. On the one hand, such a setting can reduce stress concentration. On the other hand, as Figure 1 shown, the upper end of the piezoelectric element 3 is generally located at the upper end of the second cavity 4a. At this time, after the lead wire 7 is connected to the piezoelectric element 3, it needs to be inclined to one side from the position where the first cavity 4d and the second cavity 4a are connected to connect with the corresponding pin 6. By providing the arc - shaped wall 4021, the lead wire 7 can contact the arc - shaped wall 4021 to avoid damaging the lead wire 7 at the corner. Of course, there can also be a spacing between the lead wire 7 and the arc - shaped wall 4021.

[0040] As Figure 4As shown, the first cavity 4d is a cylindrical cavity, and the cross-section of the second cavity 4a in the second direction is rectangular, so that it can be more compatible with the shape of the piezoelectric element 3 to more stably position the piezoelectric element 3. At this time, the wall of one end of the second cavity 4a close to the first cavity 4d includes four arc-shaped walls 4021 connected in sequence, so that the processing is relatively simple.

[0041] In the above embodiment, a part of the lead wire 7 is wound around the pin 6 and connected by soldering, as Figure 1 shown. The lead wire 7 is wound around the pin 6 for multiple turns, so that the reliability of the connection with the pin 6 can be improved. Of course, the lead wire 7 is not limited to being wound around the pin 6. For example, the end of the lead wire 7 can be directly abutted against the pin 6 for soldering. The soldering method of the lead wire 7 and the pin 6 can specifically be dip soldering, and the soldering is relatively firm. Of course, other soldering methods can also be used.

[0042] The mounting portion 102 in this embodiment further includes a positioning post 105, and the positioning post 105 is located in the mounting cavity 1022a, as Figure 5 shown. The circuit board 5 is provided with a positioning hole 5b, and the positioning hole 5b matches the positioning post 105. When installing the circuit board 5, in the Figure 1 viewing angle, the circuit board 5 is placed into the mounting cavity 1022a of the housing structure 1022 from top to bottom, so that the positioning post 105 and the positioning hole 5b are matched. While being matched, the pin 6 is also correspondingly inserted into the corresponding pad 5c. That is, the positioning post 105 and the positioning hole 5b realize the positioning of the circuit board 5 on the one hand, and also realize the positioning of the pad 5c and the pin 6 on the other hand, without the need to manually align the pad 5c and the pin 6. When the circuit board 5 is Figure 5 square as shown, positioning holes 5b can be provided at both diagonal positions of the circuit board 5, which has the functions of stable positioning and preventing reverse installation.

[0043] It can be seen that it is also possible to provide a positioning post on the circuit board 5 and a positioning hole on the mounting portion 102. Providing the positioning hole 5b on the circuit board 5 is more conducive to processing.

[0044] As Figure 5 shown, the circuit board 5 in this embodiment is further provided with a potting hole 5a, and the mounting cavity 1022a and the inside of the probe 4 are both filled with resin. In combination with Figure 1 understanding, when the circuit board 5 is installed into the mounting cavity 1022a, resin can be potted into the vortex flowmeter. The resin is poured in from the opening at the upper part of the housing structure 1022. The part of the mounting cavity 1022a above the circuit board 5 is filled with resin, and the resin also flows through the potting hole 5a to the part of the mounting cavity 1022a below the circuit board 5, and can also flow into the inside of the probe 4, so as to pot the pin 6, the lead wire 7 and the piezoelectric element 3, so as to achieve the purposes of sealing, insulation and connecting together.

[0045] At this time, a support portion 104 is further provided in the installation cavity 1022a of the installation portion 102 in this embodiment. The support portion 104 can be a support ring or a plurality of support columns, etc. The circuit board 5 can be supported on the support portion 104. In this way, after the circuit board 5 is installed into the installation cavity 1022a, the installation cavity 1022a can be divided into two parts located on the upper and lower sides of the circuit board 5. Thus, on the one hand, during the potting process, it is beneficial to the flow of the resin. On the other hand, it is also beneficial to leave space for placing the mutually wound pins 6 and leads 7. Of course, the connection of the pins 6 and the leads 7 can also be located inside the probe 4.

[0046] Look again Figure 1 、 4 In this embodiment, an annular groove 4c is provided on the outer peripheral wall of the probe 4, and a sealing member 2 is further included. A part of the sealing member 2 is received in the annular groove 4c. The sealing member 2 is used to seal the probe 4 and the hole wall of the installation hole 1021a to play a sealing role and prevent the fluid inside the test pipe 101 from flowing into the installation portion 102. Specifically, the annular groove 4c is provided on the outer peripheral wall of the second part 402 of the probe 4, and the second part 402 is closer to the lumen 101a of the test pipe 101, so that sealing can be achieved in a timely manner.

[0047] The working process of the vortex flowmeter in this embodiment is as follows:

[0048] The fluid flows in from the inlet 106 of the vortex flowmeter and flows out from the outlet 107. The fluid is, for example, water. When the fluid passes through the bluff body 103, regular water vortices (i.e., the Karman vortex street phenomenon) will be formed on both sides of the bluff body 103. The number of water vortices formed per unit time is proportional to the fluid flow velocity. Each water vortex will impact the probe 4 provided downstream of the bluff body 103. This impact is transmitted to the piezoelectric element 3 provided inside the probe 4, and the piezoelectric element 3 will output a voltage signal with the same frequency as the water vortex frequency. This signal is input to the circuit board 5, and the circuit board 5 processes the signal appropriately and then outputs an electrical signal that can quantify the current fluid flow rate.

[0049] This embodiment also provides an installation method for a vortex flowmeter, including the following steps:

[0050] Install the piezoelectric element 3 inside the probe 4, insert the pins 6 into the insertion holes 4b of the probe 4, connect the leads 7 with the pins 6 and the piezoelectric element 3, and assemble them into a probe assembly;

[0051] Install the probe assembly into the installation hole 1021a of the installation portion 102;

[0052] Install the circuit board 5 into the installation cavity 1022a of the housing structure 1022, and establish a connection between the circuit board 5 and the pins 6, specifically, insert them into the pads 5c for soldering;

[0053] Potting resin is filled into the installation cavity 1022a and the probe 4.

[0054] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A detection component, characterized in that, It includes a probe (4), a piezoelectric element (3) and a circuit board (5), at least part of the piezoelectric element (3) is installed in the probe (4); the detection component further includes a lead (7) and a pin (6), one end of the pin (6) is welded to the circuit board (5), the other end of the pin (6) is fixedly connected to the probe (4), the lead (7) is fixedly welded to the piezoelectric element (3), and the lead (7) is also fixedly welded to the pin (6).

2. The detection component according to claim 1, characterized in that, The probe (4) is provided with an insertion hole, one end of the pin (6) is inserted into the insertion hole (4b), and the other end of the pin (6) is connected to the circuit board (5).

3. The detection component according to claim 2, characterized in that The piezoelectric element (3) includes a first side (31) and a second side (32) that are oppositely distributed, the detection component includes two leads (7), one lead (7) is welded to the first side (31), and the other lead (7) is welded to the second side (32); The distance between the first side (31) and the second side (32) is less than the distance between two pins (6) corresponding to the two leads (7); the circuit board (5) is provided with pads (5c), and the pins (6) pass through the corresponding pads (5c) and are welded.

4. The detection component according to claim 3, wherein The probe (4) includes a receiving cavity, the receiving cavity includes a first cavity (4d) and a second cavity (4a) that are connected in a first direction, the first cavity (4d) penetrates one end of the probe (4) close to the circuit board (5), the size of the first cavity (4d) in a second direction is larger than the size of the second cavity (4a) in the second direction, the first direction is perpendicular to the second direction; the piezoelectric element (3) is located in the second cavity (4a), one end of the probe (4) close to the circuit board (5) has a first end face (4011), and the insertion hole (4b) penetrates the first end face (4011).

5. The detection component according to claim 4, wherein The wall of one end of the second cavity (4a) close to the first cavity (4d) includes an arc wall (4021), and the arc wall (4021) smoothly connects the first cavity (4d) and the second cavity (4a).

6. The detection component according to claim 5, wherein, The first cavity (4d) is a cylindrical cavity; the cross-section of the second cavity (4a) in the second direction is rectangular, and the wall of one end of the second cavity (4a) close to the first cavity (4d) includes four arc walls (4021) that are connected in sequence.

7. The detection component according to any one of claims 1-6, characterized in that, Part of the lead (7) is wound around the pin (6) and welded.

8. A vortex flowmeter, characterized in that, It includes a table body, and the table body (1) includes a test pipeline (101), a fluid stopper (103) located inside the test pipeline (101), and a mounting part (102) located on the side of the test pipeline (101); the mounting part (102) is provided with a mounting hole (1021a) and a mounting cavity (10222a), one end of the mounting hole (1021a) penetrates through the pipe wall of the test pipeline (101) to form an orifice (1021a1), and the other end of the mounting hole (1021a) communicates with the mounting cavity (1022a); The vortex flowmeter further includes the detection component according to any one of claims 1 to 7. A part of the probe (4) is located inside the mounting hole (1021a), another part of the probe (4) passes through the orifice (1021a1) and is located inside the test pipeline (101), and the circuit board (5) is installed inside the mounting cavity (1022a).

9. The vortex flowmeter according to claim 8, wherein, Among the mounting cavity (1022a) of the mounting part (102) and the circuit board (5), one is provided with a positioning post (105), and the other is provided with a positioning hole (5b), and the positioning hole (5b) matches the positioning post (105).

10. The vortex flowmeter according to claim 9, characterized in that, A support part (104) is further provided inside the mounting cavity. The circuit board (5) is supported by the support part (104), and the circuit board (5) divides the mounting cavity (1022a) into two parts; the circuit board (5) is provided with potting holes (5a), and the parts of the mounting cavity on both sides of the circuit board (5) and the inside of the probe (4) are all filled with resin.

11. The vortex flowmeter according to claim 8, characterized in that, An annular groove (4c) is provided on the outer periphery of the probe (4), and a sealing member (2) is further included. A part of the sealing member (2) is accommodated inside the annular groove (4c), and the sealing member (2) is used to seal the probe (4) and the hole wall of the mounting hole (1021a).

12. The vortex flowmeter according to claim 8, characterized in that, A first stepped surface (4012) is provided on the outer peripheral wall of the probe (4), and a second stepped surface (10211) is provided on the hole wall of the mounting hole (1021a), and the first stepped surface (4012) abuts against the second stepped surface (10211).

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