Detection assembly and vortex shedding flowmeter

Abstract

The utility model 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 contact pin body, the contact pin body is directly or indirectly connected with the probe, one side portion of the contact pin body is welded and fixed to the piezoelectric element, and the other side portion of the contact pin body is welded and fixed to the circuit board. 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 utility model relates to the technical field of detection, in particular to a detection component and a vortex flowmeter. Background Art

[0002] like Fig.11 As shown, Fig.11 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. Utility Model Content

[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 present application provides a detection component, including 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 pin body, which is directly or indirectly connected to the probe, one side of the pin body is welded and fixed to the piezoelectric element, and the other side of the pin body is welded and fixed to the circuit board.

[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 assembly and the vortex flowmeter with the detection assembly in the application, the pin body and the piezoelectric element are connected by welding. Compared with the abutment connection of the contact sheath in the background technology, the welding connection is obviously more reliable; moreover, the pin body connected to the piezoelectric element is directly or indirectly connected to the probe, and the pin body is positioned. Even if the fluid impacts the probe, the pin body is not easy to separate from the piezoelectric element. In addition, the pin body and the circuit board can be directly plugged in, which is simple to connect and quick to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the structure of a vortex flowmeter in one embodiment of the present application;

[0009] Figure 2 for Figure 1 A bottom view of the interior of the test pipe;

[0010] Figure 3 for Figure 1 Right view of;

[0011] Figure 4 for Figure 1 A schematic diagram of the structure of the middle pin component;

[0012] Figure 5 for Figure 1 The structural diagram of the circuit board;

[0013] Figure 6 for Figure 1 Schematic diagram of the structure of the probe;

[0014] Figure 7 This is a schematic diagram of the structure of a vortex flowmeter in another embodiment of the present application;

[0015] Figure 8 for Figure 7 Schematic diagram of the structure of the probe;

[0016] Fig. 9 for Figure 8 A top view of

[0017] Fig.10 for Figure 7 A schematic diagram of the structure of the connection between the middle pin body and the piezoelectric element;

[0018] Fig.11 This is a structural schematic diagram of a vortex flowmeter.

[0019] Figure 1-10 The reference numerals in the drawings are described as follows:

[0020] 1-meter body; 101-test pipe; 101a-tube cavity; 102-installation part; 1021-columnar body; 1021a-installation hole; 1021a1-mouth; 10211-second step surface; 1022-housing structure; 1022a-installation cavity; 103-blocking body; 104-supporting part; 105-positioning column; 106-inlet; 107-outlet;

[0021] 2- Sealing components;

[0022] 3- piezoelectric element; 31- first side; 32- second side;

[0023] 4-probe; 401-first part; 4011-first end surface; 4012-first step surface; 402-second part; 4022-secondary step surface; 403-third part; 4a-second cavity; 4b-second limiting groove; 4c-annular groove; 4d-first cavity; 4e-first limiting groove;

[0024] 5-circuit board; 5a-potting hole; 5b-positioning hole; 5c-soldering pad;

[0025] 6-pin component; 61-pin body; 611-first pin section; 612-third pin section; 613-second pin section; 62-connecting seat;

[0026] Fig.11 The reference numerals in the drawings are described as follows:

[0027] 1- vortex flowmeter; 2- test pipe; 3- piezoelectric element; 35- probe; 5- first contact pin; 7- second contact pin; 9- circuit board; 11- conductive socket; 33- bluff body; 16- mounting base. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a vortex flowmeter in one embodiment of the present application; Figure 2 for Figure 1 A bottom view of the interior of the test pipe 101; Figure 3 for Figure 1 The right side view of the vortex flowmeter is shown, but only the body 1 of the vortex flowmeter is shown.

[0030] The vortex flowmeter in the application includes a meter body 1, which includes a test pipe 101, a bluff body 103 located in the test pipe 101, and a mounting portion 102 located on the side of the test pipe 101. The lumen 101a inside the test pipe 101 can be used for the flow of the fluid to be tested, and the bluff body 103 is arranged inside the test pipe 101 to block the flow path of the fluid. Figure 2 It can be seen that the cross section of the bluff body 103 along the length direction of the test pipe 101 is roughly triangular. When the fluid flows in the test pipe 101, it flows along the direction of the tip of the triangle, is blocked when passing through the bluff body 103, and will bypass the bluff body 103.

[0031] In this embodiment, a mounting portion 102 is provided on the side of the test pipe 101. Figure 1 , 3 As shown, the mounting portion 102 is located at the upper side of the test pipe 101, and 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 pipe 101 to form an opening 1021a1, that is, the opening 1021a1 communicates with the mounting hole 1021a and the interior of the lumen 101a of the test pipe 101, and the other end of the mounting hole 1021a communicates with the mounting cavity 1022a. Figure 1 , 3 In the figure, the mounting hole 1021a is located below the mounting cavity 1022a, the upper part of the mounting portion 102 is a shell structure 1022 with an upper opening, the shell cavity of the shell structure 1022 is the mounting cavity 1022a, the bottom of the shell structure 1022 is connected with a columnar body 1021, the mounting hole 1021a is opened in the columnar body 1021, one end of the columnar body 1021 is connected to the shell 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 connected separately or can be an integrated structure.

[0032] The vortex flowmeter further includes a detection assembly, which 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 In the embodiment, the piezoelectric element 3 is completely installed inside the pressure head to protect and position the piezoelectric element 3. Part of the probe 4 is located in the above-mentioned mounting hole 1021a, and another part of the probe 4 passes through the mouth 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 flows to the probe 4 after passing through the above-mentioned bluff body 103. Figure 2 In the embodiment, the tip of the triangle of the bluff body 103 faces the probe 4. In addition, the circuit board 5 of the detection assembly is installed in the installation cavity 1022a of the installation portion 102.

[0033] 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 feed back to the circuit board 5, that is, the circuit board 5 and the probe 4 need to be connected. It is worth noting that in this embodiment, the detection component also includes a lead pin component 6, such as Figure 4 As shown, Figure 4 for Figure 1 Schematic diagram of the structure of the middle pin component 6.

[0034] The pin component 6 includes a pin body 61 and a connection seat 62. A portion of the pin body 61 and the connection seat 62 are an integral injection-molded structure, that is, the two are injection-molded together. Figure 1 As shown, the piezoelectric element 3 in this embodiment includes a first side 31 and a second side 32 that are relatively distributed. Figure 1 The left and right sides of the piezoelectric element 3 are shown in FIG. 1 , and 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. At this time, the detection component includes two pin bodies 61, one side of one pin body 61 is welded to the first side 31, and one side of the other pin body 62 is welded to the second side 32. The two pin bodies 61 are also respectively connected to the circuit board 5, and the pin body 61 can be inserted into the circuit board 5, and the other side of the pin body 61 can be welded to the circuit board 5. In this way, the positive and negative electrodes of the piezoelectric element 3 can be connected to the circuit board 5 to establish the required circuit. The two pin bodies 61 and the connecting seat 62 are injection molded as one body.

[0035] In this way, the pin component 6 and the piezoelectric element 3 are welded and connected. Compared with the contact sheath abutment connection in the background art, the welding connection is obviously more reliable; moreover, the pin body 61 connected to the piezoelectric element 3 and the connection seat 62 are injection molded as an integral injection structure, so that the pin component 6 is an integral structure, and the two pin bodies 61 are mutually restrained. Even if the fluid impacts the probe 4, the pin body 61 is not easy to separate from the piezoelectric element 3. In addition, the pin body 61 and the circuit board 5 can be directly plugged and connected, the connection method is simple, and the assembly is fast.

[0036] In addition, if Figure 1 , 4 As shown, combined with Figure 5 understand, Figure 5 for Figure 1 Schematic diagram of the structure of the circuit board 5.

[0037] The pin body 61 includes a first pin segment 611 and a second pin segment 613. The second pin segment 613 of one pin body 61 is welded to the first side 31, and the second pin segment 613 of the other pin body 61 is welded to the second side 32. The first pin segments 611 of the two pin bodies 61 are both connected to the circuit board 5. The spacing between the two first pin segments 611 is smaller than the spacing between the two second pin segments 613. The spacing here refers to the spacing in the direction perpendicular to the first side 31 and the second side 32. The circuit board 5 is provided with a soldering pad 5c, and the second pin segment 613 passes through the corresponding soldering pad 5c and is welded.

[0038] In this way, the distance between the two positions on the circuit board 5 connected to the plug pin 6 is greater than the distance between the two second plug pin sections 613, that is, greater than the distance between the first side 31 and the second side 32. The distance between the two positions on the circuit board 5 connected to the plug pin 6 can be set to be larger, and the circuit board 5 can be provided with a pad 5c to connect with the plug pin 6. The plug pin 6 passes through the corresponding pad 5c and is welded and connected. The pad 5c and the plug pin 6 are welded and connected, and the connection is more reliable.

[0039] The positive and negative contact pins on both sides of the piezoelectric element 3 in the background technology directly extend upward and connect to the circuit board 5 above. Since the distance between the two contact pins is relatively close, it is difficult to set two pads 5c with similar distances on the circuit board 5. Therefore, the solution adopted in the background technology is to set a conductive socket above the circuit board 5. The conductive socket has an elastic compression spring inside to press the contact pins so that the contact pins and the circuit board 5 maintain contact connection. It can be seen that the setting method in this embodiment is to increase the distance between the two first pin sections 611, so that the pad 5c can be set on the circuit board 5, and the pin component 6 is reliably connected to the circuit board 5, and there is no need to set a conductive socket, which simplifies the structure of the detection component.

[0040] like Figure 1 As shown, since the distance between the two first pin segments 611 is relatively far, in order to realize the connection between the first pin segment 611 and the piezoelectric element 3, the pin component 6 also includes a third pin segment 612, one end of the third pin segment 612 is connected to the first pin segment 611, and the other end is connected to the second pin segment 613; the first pin segment 611 and the second pin segment 613 extend along the first direction, and the third pin segment 612 extends along the second direction, and the first direction and the second direction are perpendicular. Specifically, Figure 1In the figure, the first direction is the up-down direction, and the second direction is the lateral direction perpendicular to the up-down direction. The third pin segment 612 is located in the connection seat 62. Specifically, during injection molding, the third pin segment 612 can be placed in the cavity of the injection mold. After the injected resin is cured, the connection seat 62 that wraps the two third pin segments 612 is formed. The first pin segment 611 and the third pin segment 613 are also located in the connection seat 62, but at least part of them must be outside the connection seat 62 to achieve connection with the circuit board 5 and the piezoelectric element 3.

[0041] At this time, each pin body 61 can be formed by bending a pin body. It can be understood that the third pin segment 612 is not limited to being perpendicular to the first direction, for example, it can also be inclined relative to the first direction, as long as it can connect the first pin segment 611 and the second pin segment 613. The third pin segment 612 is provided here to facilitate the arrangement of the first pin segment 611 and the second pin segment 613 with different spacings. At the same time, the connecting seat 62 injects the third pin segment 612 inside it, which can avoid deformation of the bent pin body 61.

[0042] like Figure 6 As shown, Figure 6 for Figure 1 The schematic diagram of the structure of the middle probe 4 shows half of the structure cut away along the length direction of the probe 4.

[0043] Look again Figure 6 The probe 4 in this embodiment includes a housing cavity, which includes a first cavity 4d and a second cavity 4a connected along 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 passes through one end of the probe 4. The probe 4 has a first end face 4011 close to the circuit board 5. The first end face 4011 of the probe 4 is annular, specifically a circular ring. The size of the first cavity 4d in the second direction is greater than the size of the second cavity 4a in the second direction. The first direction is perpendicular to the second direction. Figure 4 The piezoelectric element 3 is located in the second cavity 4a, which is set to be smaller in size and a relatively slender pore structure, so that the piezoelectric element 3 can be positioned more reliably, so that the piezoelectric element 3 is in a relatively stable state, while the first cavity 4d is set to be larger in size, so that the pin body 61 and the piezoelectric element 3 are connected and extend into the first cavity 4d, and the first cavity 4d can provide enough space to allow the pin body 61 to increase the spacing in the first cavity 4d.

[0044] In this embodiment, the pin body 61 is indirectly connected to the probe 4 through the connecting seat 62. In detail, in this embodiment, the first end surface 4011 is provided with a second limiting groove 4b, and the connecting seat 62 of the pin component 6 can be supported in the second limiting groove 4b, that is, the connecting seat 62 and the probe 4 are directly connected. Since the pin body 6 and the connecting seat 62 are injection molded as one, the pin body 61 and the probe 4 are indirectly connected, so that the pin body 62 is positioned and the impact of fluid impact on the pin body 62 is reduced. Figure 4 As shown, the connection seat 62 is a rectangular block structure, and the first end face 4011 can be provided with two second limiting grooves 4b, and the two ends of the connection seat 62 are supported in the second limiting grooves 4b respectively. The second limiting grooves 4b can limit the connection seat 62, and because the connection seat 62 is supported in the second limiting grooves 4b, even if the pin body 61 and the circuit board 5 are subjected to force during or after the plugging process, the force is offset by the reaction force of the probe 4 and will not be transmitted to the piezoelectric element 3, which is beneficial to protect the piezoelectric element 3. In addition, the first end face 4011 in this embodiment can be annular, and the two second limiting grooves 4b are symmetrically arranged along the radial direction of the first end face 4011, so that the distance between the two pin bodies 61 can be maximized, and the structural symmetry is also beneficial to the stability and force balance of the plug-in of the pin component 6 and the probe 4.

[0045] like Figure 6 As shown, the probe 4 includes a first portion 401, a second portion 402, and a third portion 403 connected to each other. The three portions are connected along a first direction. Figure 6 The vertical direction is also the length direction of the probe 4 or the piezoelectric element 3. The first part 401 defines a first cavity 4d, and the second part 402 and the third part 403 define a second cavity 4a. The first part 401, the second part 402, and the third part 403 gradually reduce their sizes in the second direction from top to bottom, so that the outer peripheral wall of the probe 4 forms a two-level step structure, including two-level step surfaces, namely, a primary step surface and a secondary step surface 4022. The primary step surface is the first step surface 4012, as shown in FIG. Figure 3 As shown, the hole wall of the mounting hole 1021a includes a second step surface 10211. Figure 1 As shown, after the probe 4 is installed, the second step surface 10211 and the first step surface 4012 abut against each other in the vertical direction to position the probe 4 and the mounting hole 1021a. In this way, after the pin 6 is installed and positioned on the probe 4, the probe 4 is supported and positioned on the second step surface 10211 of the mounting portion 102, and the force of the pin 6 can be directly transmitted to the mounting portion 102, and the plug-in connection with the circuit board 5 is easy to operate and more 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.

[0046] like Figure 6As shown, the first cavity 4d is a cylindrical cavity, and the cross-section of the second cavity 4a along the second direction is a rectangle, which can better match the shape of the piezoelectric element 3 to more stably position the piezoelectric element 3.

[0047] The mounting portion 102 in this embodiment further includes a positioning column 105, which is located in the mounting cavity 1022a. Figure 5 As shown, the circuit board 5 is provided with a positioning hole 5b, and the positioning hole 5b matches the positioning column 105. When installing the circuit board 5, place the circuit board 5 on the Figure 1 From the perspective of the circuit board 5, the circuit board 5 is placed in the installation cavity 1022a of the housing structure 1022 from top to bottom, so that the positioning column 105 and the positioning hole 5b are matched, and the pin 6 is also inserted into the corresponding pad 5c accordingly. That is, the positioning column 105 and the positioning hole 5b realize the positioning of the circuit board 5 on the one hand, and the positioning of the pad 5c and the pin 6 on the other hand, and there is no need to manually align the pad 5c and the pin 6. The circuit board 5 is Figure 5 In the case of the square shape shown, positioning holes 5b can be provided at two diagonal positions of the circuit board 5 to ensure stable positioning and prevent the circuit board from being installed in the wrong direction.

[0048] It can be known that a positioning column can be provided on the circuit board 5 or a positioning hole can be provided on the mounting portion 102 . It is more convenient to process the circuit board 5 to provide the positioning hole 5 b .

[0049] like Figure 5 As shown, the circuit board 5 in this embodiment is also provided with a potting hole 5a, and the interior of the mounting cavity 1022a and the probe 4 are filled with resin. Figure 1 It is understood that after the circuit board 5 is installed in the installation cavity 1022a, the vortex flowmeter can be encapsulated with resin, and the resin is poured into the opening at the top of the shell structure 1022. The portion of the installation cavity 1022a located above the circuit board 5 is filled with resin, and the resin also flows through the encapsulation hole 5a to the portion of the installation cavity 1022a located below the circuit board 5, and can also flow to the inside of the probe 4, thereby encapsulating the pin component 6 and the piezoelectric element 3 to achieve the purpose of sealing, insulation and connection. It is mentioned above that the connecting seat 62 is supported in the second limit groove 4b4b. In addition to the supporting part, there is a spacing between the two sides of the connecting seat 62 along the second direction and the first end face 4011 to avoid covering the upper opening of the first cavity 4d, so as to leave a gap so that the resin can flow to the inside of the probe 4.

[0050] In this embodiment, a supporting portion 104 is further provided in the mounting cavity 1022a of the mounting portion 102. The supporting portion 104 may be a supporting ring or a plurality of supporting columns, etc. The circuit board 5 may be supported on the supporting portion 104. In this way, after the circuit board 5 is installed in the mounting cavity 1022a, the mounting cavity 1022a may be divided into two parts located on the upper and lower sides of the circuit board 5. In this way, on the one hand, it is conducive to the flow of resin during the potting process, and on the other hand, it is also conducive to leaving space for the pin 6 and the circuit board 5 to be plugged in and connected.

[0051] Look again Figure 1 , 4 In this embodiment, the outer peripheral wall of the probe 4 is provided with an annular groove 4c, and also includes a sealing component 2, part of which is accommodated in the annular groove 4c, and the sealing component 2 is used to seal the probe 4 and the hole wall of the mounting hole 1021a, so as to play a sealing role and prevent the fluid inside the test pipe 101 from flowing into the mounting part 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 the sealing can be achieved in time.

[0052] The working process of the vortex flowmeter in this embodiment is as follows:

[0053] The fluid flows in from the inlet 106 of the vortex flowmeter and flows out from the outlet 107. The fluid, for example, water, will form regular water vortices on both sides of the bluff body 103 when the fluid passes through the bluff body 103 (i.e., the Karman vortex street phenomenon). The number of water vortices formed per unit time is proportional to the fluid flow rate. Each water vortex will impact the probe 4 arranged downstream of the bluff body 103. The impact is transmitted to the piezoelectric element 3 arranged inside the probe 4. The piezoelectric element 3 will output a voltage signal with the same frequency as the water vortex. The signal is input to the circuit board 5. The circuit board 5 processes the signal appropriately and outputs an electrical signal that can quantify the current fluid flow.

[0054] This embodiment also provides a method for installing a vortex flowmeter, comprising the following steps:

[0055] Install the piezoelectric element 3 inside the probe 4, inject the two pin bodies 61 into one body to form a connecting seat 6 including a connecting seat 62, support the connecting seat 62 into the second limiting groove 4b4b of the probe 4, and assemble into a probe assembly;

[0056] Install the probe assembly into the mounting hole 1021a of the mounting portion 102;

[0057] The circuit board 5 is installed in the installation cavity 1022a of the housing structure 1022, and the circuit board 5 is connected to the pin body 61 of the pin component 6, specifically, the soldering pad 5c is inserted for soldering;

[0058] The installation cavity 1022 a and the probe 4 are filled with resin.

[0059] You can continue to refer to Figure 7-10 , Figure 7 This is a schematic diagram of the structure of a vortex flowmeter in another embodiment of the present application; Figure 8 for Figure 7 A schematic diagram of the structure of the middle probe 4; Fig. 9 for Figure 8 A top view of Fig.10 for Figure 7 Schematic diagram of the structure of the connection between the middle pin body 61 and the piezoelectric element 3.

[0060] The structure of this embodiment is basically the same as that of the above embodiment, except that the pin body 61 is directly connected to the probe 4, and the connecting seat 62 is no longer provided. The same parts are not repeated. At this time, the first end surface 4011 of the probe 4 is provided with a first limiting groove 4e, and part of the third pin segment 612 of the pin body 61 can be located in the first limiting groove 4e. The first limiting groove 4e is similar to the second limiting groove 4d, except that the first limiting groove 4e is provided to be more slender so as to match the thickness of the third pin segment 612 and limit the third pin segment 612. Compared with the above embodiment, this embodiment does not need to provide a connecting seat 62, and the two pin bodies 61 are directly limited in the corresponding first limiting groove 4e, and the pin bodies 61 can also be positioned. The structure is also simpler, but it is obvious that by injection molding the connecting seat 62 together and limiting the connecting seat 62 to the second limiting groove 4d, the limiting is more reliable, and the connecting seat 62 can play a certain protective role for the two pin bodies 61.

[0061] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A detection component, characterized in that: The detection component comprises a probe (4), a piezoelectric element (3) and a circuit board (5), wherein at least a portion of the piezoelectric element (3) is installed in the probe (4); the detection component further comprises a pin body (61), wherein the pin body (61) is directly or indirectly connected to the probe (4), one side of the pin body (61) is welded and fixed to the piezoelectric element (3), and the other side of the pin body (61) is welded and fixed to the circuit board (5).

2. A detection component according to claim 1, characterized in that: The probe (4) is provided with a first limiting groove, the insertion pin body (61) is at least partially limited in the first limiting groove, and the insertion pin body (61) is directly fixedly connected or limitedly connected to the probe (4).

3. A detection component according to claim 1, characterized in that: The detection assembly comprises a pin component (6), the pin component (6) comprises the pin body (61) and a connecting seat (62), a portion of the pin body (61) and the connecting seat (62) are formed into an integral structure by injection molding, the pin body (61) is fixedly connected or limit-connected to the probe (4) via the connecting seat (62), the probe (4) is provided with a second limit groove, and the connecting seat (62) is at least partially limited in the second limit groove.

4. The detection component according to any one of claims 1 to 2, characterized in that: The piezoelectric element (3) comprises a first side (31) and a second side (32) which are relatively distributed; the detection assembly comprises two pin bodies (61); the pin body (61) comprises a first pin segment (611) and a second pin segment (613); the second pin segment (613) of one pin body (61) is welded to the first side (31); the second pin segment (613) of the other pin body (61) is welded to the second side (32); the first pin segments (611) of the two pin bodies (61) are connected to the circuit board (5); The spacing between the two first pin sections (611) is smaller than the spacing between the two second pin sections (613); the circuit board (5) is provided with a soldering pad (5c), and the second pin section (613) passes through the corresponding soldering pad (5c) and is soldered and connected.

5. The detection component according to claim 4, characterized in that: The detection assembly comprises a pin component (6), the pin component (6) comprises the pin body (61) and a connecting seat (62), a portion of the pin body (61) and the connecting seat (62) are formed into an integral structure by injection molding, the pin body (61) is fixedly connected or limit-connected to the probe (4) via the connecting seat (62), the probe (4) is provided with a second limit groove, and the connecting seat (62) is at least partially limited in the second limit groove; The pin body (61) comprises a third pin segment (612), one end of the third pin segment (612) is connected to the first pin segment (611), and the other end is connected to the second pin segment (613); the first pin segment (611) and the second pin segment (613) extend along a first direction, and the third pin segment (612) extends along a second direction, and the first direction and the second direction are perpendicular; the third pin segment (612) is located in the connecting seat (62).

6. The detection component according to any one of claims 1 to 3, characterized in that: The probe (4) comprises a accommodating cavity, the accommodating cavity comprises a first cavity (4d) and a second cavity (4a) connected along a first direction, the first cavity (4d) passes through an end of the probe (4) close to the circuit board (5), the size of the first cavity (4d) in the second direction is larger than the size of the second cavity (4a) in the second direction, and the first direction is perpendicular to the second direction; the piezoelectric element (3) is located in the second cavity (4a).

7. The detection component according to claim 3, characterized in that: The probe (4) comprises a accommodating cavity, the accommodating cavity comprises a first cavity (4d) and a second cavity (4a) connected along a first direction, the first cavity (4d) passes through an end of the probe (4) close to the circuit board (5), the size of the first cavity (4d) in the second direction is larger than the size of the second cavity (4a) in the second direction, and the first direction is perpendicular to the second direction; the piezoelectric element (3) is located in the second cavity (4a); the end of the probe (4) close to the circuit board (5) has a first end face (4011), the first end face (4011) is provided with the second limiting groove (4b), and the connecting seat (62) is supported on the second limiting groove (4b).

8. A vortex flowmeter, characterized in that: The meter body (1) comprises a test pipe (101), a bluff body (103) located in the test pipe (101), and a mounting portion (102) located on the side of the test pipe (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 pipe (101) to form an opening (1021a1), and the other end of the mounting hole (1021a) is in communication with the mounting cavity (1022a); The vortex flowmeter also includes a detection component as described in any one of claims 1 to 7, part of the probe (4) is located in the mounting hole (1021a), another part of the probe (4) passes through the mouth (1021a1) and is located inside the test pipe (101), and the circuit board (5) is installed in the mounting cavity (1022a).

9. The vortex flowmeter according to claim 8, characterized in that: One of the mounting cavity (1022a) of the mounting portion (102) and the circuit board (5) is provided with a positioning column (105), and the other is provided with a positioning hole (5b), and the positioning hole (5b) matches the positioning column (105).

10. The vortex flowmeter according to claim 9, characterized in that: A support portion (104) is also provided in the installation cavity, the circuit board (5) is supported by the support portion (104), and the circuit board (5) divides the installation cavity (1022a) into two parts; the circuit board (5) is provided with a potting hole (5a), and the parts of the installation cavity located on both sides of the circuit board (5) and the interior of the probe (4) are filled with resin.

11. The vortex flowmeter according to claim 8, characterized in that: The probe (4) is provided with an annular groove (4c) on its outer periphery, and further comprises a sealing component (2), a portion of which is accommodated in the annular groove (4c), and the sealing component (2) is used to seal the probe (4) and the hole wall of the mounting hole (1021a).

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