Coil connection structure of Coriolis mass flow sensor

Abstract

The utility model relates to a coil connecting structure of a Coriolis mass flow sensor, and relates to the technical field of Coriolis mass flow sensors, the coil connecting structure comprises a coil, a circuit board and an elastic connecting piece, the coil is used for being connected to a measuring tube, the circuit board is used for being connected to a shell of the Coriolis mass flow sensor, and the elastic connecting piece is arranged on the circuit board. The circuit board is electrically connected with a secondary instrument transmitter outside the Coriolis mass flow sensor, the elastic connecting piece has elastic and conductive characteristics, one end of the elastic connecting piece is connected to the coil, the other end of the elastic connecting piece is connected to the circuit board, and the elastic connecting piece is electrically connected with the coil and the circuit board. According to the invention, the coil is not liable to affect the measurement of a measuring tube with a small diameter after wiring.

Description

Technical Field

[0001] This application relates to the technical field of Coriolis mass flow sensors, and in particular to a coil connection structure for a Coriolis mass flow sensor. Background Technology

[0002] Coriolis mass flow sensors commonly use a dual-tube measurement structure, with a coil mounted on one measuring tube and a magnet mounted on the other. The coil is powered by a transmitter control circuit, causing the coil and magnet to generate attractive and repulsive forces, thereby achieving resonant motion of the two measuring tubes.

[0003] Currently, the wiring method for the coil mainly uses polytetrafluoroethylene (PTFE) wires. One end of the PTFE wire is connected to the coil, and the other end is connected to the secondary instrument transmitter outside the Coriolis mass flow sensor. The PTFE wire is glued to one of the measuring tubes with glue or tape to realize the connection of the coil's power supply circuit.

[0004] The above-mentioned coil wiring method requires the use of a measuring tube to fix the PTFE wire. For measuring tubes with a small diameter, such as those with a diameter of no more than 25 mm, the mass of the bonded PTFE wire will account for a large proportion of the mass of the measuring tube, which will affect the symmetry of the two measuring tubes, thereby affecting the stability of the entire Coriolis mass flow sensor measurement system and reducing the measurement accuracy of the Coriolis mass flow sensor. Utility Model Content

[0005] In order to prevent the coil from affecting the measurement of a small-diameter measuring tube after wiring, this application provides a coil connection structure for a Coriolis mass flow sensor.

[0006] This application provides a coil connection structure for a Coriolis mass flow sensor, employing the following technical solution:

[0007] A coil connection structure for a Coriolis mass flow sensor includes a coil, a circuit board, and an elastic connector. The coil is used to connect to a measuring tube, and the circuit board is used to connect to the housing of the Coriolis mass flow sensor. The circuit board is electrically connected to a secondary instrument transmitter outside the Coriolis mass flow sensor. The elastic connector has elastic and conductive properties, with one end connected to the coil and the other end connected to the circuit board. The elastic connector electrically connects the coil and the circuit board.

[0008] Optionally, the elastic connector is a copper strip.

[0009] Optionally, the elastic connector is a spring steel strip.

[0010] Optionally, the thickness of the elastic connector is no more than 0.16 mm, and the width of the elastic connector is 0.4-1 mm.

[0011] Optionally, the elastic connector is wavy along its own extension direction.

[0012] Optionally, quick-connect components are provided at both ends of the elastic connector, and wiring through holes are provided on both the coil and the circuit board. The quick-connect components are used to be inserted into the wiring through holes by elastic deformation. When the quick-connect components at both ends of the elastic connector are inserted into the wiring through holes, the elastic connector is fixed to the coil and the circuit board respectively.

[0013] Optionally, the quick-connect assembly includes a first connector, a spring, and a clip. The first connector is connected to the end of the elastic connector. Multiple springs are provided and arranged in a circumferential array. The springs are connected to the side of the first connector away from the elastic connector. Multiple clips are provided and are connected one-to-one to the end of the spring away from the first connector. When the spring is inserted into the wiring through hole, both the clip and the first connector can fit onto the coil or circuit board.

[0014] Optionally, the quick-connect assembly includes a second connector, a connecting rod, and elastic clips. The second connector is connected to the end of the elastic connector. One end of the connecting rod is connected to the side of the second connector away from the elastic connector. Multiple elastic clips are provided and arranged in a divergent pattern. The end of the elastic clip near the center of the divergence is connected to the end of the connecting rod away from the second connector. When the connecting rod is inserted into the wiring through hole, the end of the elastic clip away from the connecting rod can abut against the coil or circuit board, and the second connector can fit against the coil or circuit board.

[0015] Optionally, a hinged ball is connected to the circuit board, a hinged shell is fitted on the hinged ball, and a bracket is connected to the hinged shell. The hinged ball and the hinged shell make the circuit board and the bracket ball hingedly connected. A first fixing bolt is threaded through the hinged shell. The first fixing bolt is used to abut against the hinged ball to fix the hinged ball and the hinged shell. An oblong hole is opened at the end of the bracket away from the hinged shell. A second fixing bolt slides through the oblong hole. A fixing support plate is threaded through the second fixing bolt. The fixing support plate is connected to the housing of the Coriolis mass flow sensor.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. This application discloses a coil connection structure for a Coriolis mass flow sensor, comprising a coil, a circuit board, and an elastic connector. The elastic connector has elastic and conductive properties. The coil is electrically connected to a secondary instrument transmitter outside the Coriolis mass flow sensor via the elastic connector and the circuit board. This eliminates the need for the PTFE wire to be bonded to the measuring tube, improving the symmetry of the two measuring tubes. Furthermore, since the elastic connector can buffer the vibration transmitted by the coil through elastic deformation, it can reduce vibration crosstalk and improve the measurement accuracy of the Coriolis mass flow sensor. This also makes it less likely for the coil to affect the stable resonance and accurate measurement of the smaller diameter measuring tube after wiring.

[0018] 2. The coil connection structure of the Coriolis mass flow sensor disclosed in this application also includes a quick-connect assembly, wherein the quick-connect assembly enables the quick installation of the elastic connector with the coil and the circuit board respectively, which helps to ensure the stability of the subsequent electrical connection operation of the elastic connector. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0020] Figure 2 This is an exploded view of the quick-connect assembly in Embodiment 1 of this application;

[0021] Figure 3 This is a schematic diagram of the quick-connect component in Embodiment 3 of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Coil; 11. Wiring through hole; 2. Circuit board; 3. Flexible connector; 4. Quick-connect assembly; 41. First connector; 42. Spring; 43. Clip; 44. Second connector; 45. Connecting rod; 46. Flexible clip; 5. Hinge ball; 6. Hinge shell; 61. First fixing bolt; 7. Bracket; 71. Oval hole; 8. Second fixing bolt; 9. Fixing plate. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0025] This application discloses a coil connection structure for a Coriolis mass flow sensor. Example 1

[0026] Reference Figure 1A coil connection structure for a Coriolis mass flow sensor includes a coil 1, a circuit board 2, and an elastic connector 3. The coil 1 is fixed to a measuring tube, and the circuit board 2 is connected to the housing of the Coriolis mass flow sensor. The circuit board 2 is electrically connected to a secondary instrument transmitter outside the Coriolis mass flow sensor via polytetrafluoroethylene wires. The elastic connector 3 has elastic and conductive properties. One end of the elastic connector 3 is soldered to the coil 1, and the other end is soldered to the circuit board 2. The elastic connector 3 electrically connects the coil 1 and the circuit board 2.

[0027] When wiring the coil 1 on the smaller diameter measuring tube, the circuit board 2 is connected to the housing of the Coriolis mass flow sensor. The circuit board 2 and the external secondary instrument transmitter of the Coriolis mass flow sensor are electrically connected through PTFE wires. This eliminates the need for the PTFE wires connected to the external secondary instrument transmitter to be fixed to the measuring tube, thus improving the symmetry and dynamic balance of the two measuring tubes.

[0028] The elastic connector 3, which has elasticity and conductivity, is soldered between the coil 1 and the circuit board 2 to achieve an elastic electrical connection between the coil 1 and the circuit board 2. Firstly, this reduces the difficulty of wiring the coil 1. Secondly, due to the elastic connection between the coil 1 and the circuit board 2, when the coil 1 drives the measuring tube to vibrate, the elastic connector 3 can buffer the vibration transmitted on the coil 1 through elastic deformation, thereby improving the connection quality of the conductive circuit. Moreover, the conductive circuit is less likely to be broken due to vibration during transportation and storage. Thirdly, the elastic deformation of the elastic connector 3 can reduce vibration crosstalk, thereby improving zero-point stability and ensuring that the Coriolis mass flow sensor can have a good vibration state and reliable working state. This makes it less likely that the coil 1 will affect the measurement of the smaller diameter measuring tube after wiring.

[0029] Specifically, refer to Figure 1 The elastic connector 3 is made of copper strip. Because copper strip has good elasticity, strength and conductivity, it can fully meet the requirements of elastic connection and reliable conductivity of elastic connector 3.

[0030] In order to enable the elastic connector 3 to meet both the requirements of vibration damping and the requirements of soldering installation, the thickness of the elastic connector 3 is no more than 0.16mm and the width of the elastic connector 3 is 0.4-1mm. In this embodiment, the thickness of the elastic connector 3 is preferably 0.02mm and the width of the elastic connector 3 is preferably 0.8mm.

[0031] By limiting the thickness and width of the elastic connector 3, the elastic connector 3 can easily meet the requirements of vibration damping and soldering installation.

[0032] Reference Figure 2In order to improve the vibration buffering ability of the elastic connector 3, the elastic connector 3 is wavy along its extension direction. The wavy elastic connector 3 has better elastic deformation ability, which improves the vibration buffering ability of the elastic connector 3, thereby making the zero-point stability of the Coriolis mass flow sensor better.

[0033] Reference Figure 1 and Figure 2 In order to make it easier and faster to install the elastic connector 3 on the coil 1 and the circuit board 2, quick-connect components 4 are provided at both ends of the elastic connector 3. Both the coil 1 and the circuit board 2 are provided with wiring through holes 11. The quick-connect components 4 are used to be inserted into the wiring through holes 11 by elastic deformation. When the quick-connect components 4 at both ends of the elastic connector 3 are inserted into the wiring through holes 11, the elastic connector 3 is fixed to the coil 1 and the circuit board 2 respectively.

[0034] Since the quick-connect component 4 can be connected to the wiring through hole 11 in a spring-loaded manner, when connecting the coil 1 and the circuit board 2 through the elastic connector 3, the quick-connect component 4 can be directly inserted into the wiring through hole 11, so that the elastic connector 3 can be conveniently and quickly installed on the coil 1 and the circuit board 2, so as to ensure the stability of the subsequent electrical connection operation of the elastic connector 3.

[0035] Specifically, refer to Figure 1 and Figure 2 The quick-connect assembly 4 includes a first connector 41, a spring tab 42, and a locking head 43. The first connector 41 is fixed to the end of the elastic connector 3. Multiple spring tabs 42 are provided and arranged in a circumferential array. The spring tabs 42 are fixed to the side of the first connector 41 away from the elastic connector 3. Multiple locking heads 43 are provided and are fixed to the end of the spring tab 42 away from the first connector 41. When the spring tab 42 is inserted into the wiring through hole 11, both the locking head 43 and the first connector 41 can fit onto the coil 1 or the circuit board 2.

[0036] When the elastic connector 3 needs to be installed, all the spring pieces 42 are inserted into the wiring through holes 11. When the clip 43 passes through the wiring through holes 11, it can push the spring pieces 42 to deform so that it can pass through the wiring through holes 11. After the clip 43 passes through the wiring through holes 11, the spring pieces 42 drive the clip 43 to reset under its own elastic force so that the clip 43 and the first connector 41 can both fit on the coil 1 or the circuit board 2. Through the snapping action formed by the clip 43 and the first connector 41, the elastic connector 3 can be installed quickly and stably on the coil 1 and the circuit board 2.

[0037] Reference Figure 1 and Figure 2To facilitate flexible adjustment of the position of the circuit board 2 and to prevent the elastic connector 3 from being subjected to torque when connected to the circuit board 2, a hinge ball 5 is fixedly connected to the circuit board 2. A hinge shell 6 is fitted onto the hinge ball 5. A bracket 7 is fixedly connected to the hinge shell 6. The hinge ball 5 and the hinge shell 6 connect the circuit board 2 to the bracket 7 in a ball-hinged connection. A first fixing bolt 61 is threaded through the hinge shell 6. The first fixing bolt 61 is used to abut against the hinge ball 5 to fix the hinge ball 5 and the hinge shell 6. A waist-shaped hole 71 is opened at the end of the bracket 7 away from the hinge shell 6. A second fixing bolt 8 slides through the waist-shaped hole 71. A fixing support plate 9 is threaded through the second fixing bolt 8. The fixing support plate 9 is fixedly connected to the outer shell of the Coriolis mass flow sensor.

[0038] When connecting the elastic connector 3 and the circuit board 2, the position of the circuit board 2 is adjusted according to the elastic deformation direction of the elastic connector 3. First, the position of the second fixing bolt 8 in the oblong hole 71 is adjusted so that the distance between the end of the circuit board 2 and the elastic connector 3 is just right for connection. Then, by tightening the second fixing bolt 8, the bracket 7 is fixed to the fixed support plate 9. Then, the circuit board 2 is swung so that the elastic connector 3 can be soldered to the circuit board 2 without torque. Then, by tightening the first fixing bolt 61, the hinge ball 5 and the hinge shell 6 are fixed, so that the position of the circuit board 2 can be flexibly adjusted to facilitate the connection between the circuit board 2 and the elastic connector 3.

[0039] The implementation principle of the coil connection structure of a Coriolis mass flow sensor according to an embodiment of this application is as follows: In use, the position of the circuit board 2 is adjusted through the oblong hole 71 and the hinge ball 5, and the adjusted position of the circuit board 2 is fixed by the first fixing bolt 61 and the second fixing bolt 8. The spring pieces 42 at both ends of the elastic connector 3 are inserted into the wiring through holes 11 of the coil 1 and the wiring through holes 11 of the circuit board 2, respectively. The clamp 43 and the first connector 41 cooperate to prevent the spring pieces 42 from falling out of the wiring through holes 11. Then, the elastic connector 3 is soldered to the coil 1 and the circuit board 2, respectively. The wavy elastic... The connector 3 has excellent elastic deformation capability, which can effectively buffer the vibration transmitted by the coil 1. At the same time, the PTFE wire connected to the external secondary instrument transmitter of the Coriolis mass flow sensor can be connected to the circuit board 2 without being directly connected to the coil 1 or to the measuring tube. This improves the symmetry of the two measuring tubes, enhances the stability of the entire Coriolis mass flow sensor measurement system, and improves the measurement accuracy of the Coriolis mass flow sensor. It also makes it less likely that the coil 1 will affect the stable resonance and accurate measurement of the smaller diameter measuring tube after wiring. Example 2

[0040] Reference Figure 1The difference between this embodiment and embodiment 1 is that the elastic connector 3 is a spring steel strip. The spring steel strip has excellent elasticity and conductivity, which can effectively buffer the vibration transmitted by the coil 1 while conducting electricity. Example 3

[0041] Reference Figure 3 The difference between this embodiment and embodiment 1 is that the quick-connect component 4 includes a second connector 44, a connecting rod 45, and an elastic card 46. The second connector 44 is fixed to the end of the elastic connector 3. One end of the connecting rod 45 is fixed to the side of the second connector 44 away from the elastic connector 3. Multiple elastic cards 46 are provided and arranged in a divergent manner. The end of the elastic card 46 near the center of divergence is fixed to the end of the connecting rod 45 away from the second connector 44. When the connecting rod 45 is inserted into the wiring through hole 11, the end of the elastic card 46 away from the connecting rod 45 can abut against the coil 1 or the circuit board 2, and the second connector 44 can fit against the coil 1 or the circuit board 2.

[0042] When the elastic connector 3 needs to be installed, the connecting rod 45 is inserted into the wiring through hole 11. The elastic card 46 passes through the wiring through hole 11 through its own elastic deformation. After the elastic card 46 passes through the wiring through hole 11, the elastic card 46 can automatically reset. The reset elastic card 46 can abut against the coil 1 or the circuit board 2. With the cooperation of the elastic card 46 and the second connector 44, the elastic connector 3 can be installed quickly and stably on the coil 1 and the circuit board 2.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coil connection structure of a Coriolis mass flow sensor, characterized by: The utility model relates to a coil (1) for connecting on a measuring tube, a circuit board (2) for connecting on a housing of a coriolis mass flow sensor, and an elastic connecting piece (3) having elastic and conductive properties, the elastic connecting piece (3) being electrically connected to the coil (1) and the circuit board (2).

2. A coil connection structure for a Coriolis mass flow sensor as defined in claim 1 wherein: The elastic connecting piece (3) is a copper strip.

3. A coil connection structure for a Coriolis mass flow sensor as described in claim 1 wherein: The elastic connecting piece (3) is a spring steel strip.

4. A coil connection structure for a Coriolis mass flow sensor as described in claim 1 wherein: The thickness of the elastic connecting piece (3) is not greater than 0.16 mm, and the width of the elastic connecting piece (3) is 0.4-1 mm.

5. A coil connection structure for a Coriolis mass flow sensor as described in claim 1 wherein: The elastic connecting piece (3) is wavy along the extension direction thereof.

6. A coil connection structure for a Coriolis mass flow sensor as described in claim 1 wherein: Both ends of the elastic connecting piece (3) are provided with quick-connection assemblies (4), the coil (1) and the circuit board (2) are both provided with wire connection through holes (11), the quick-connection assemblies (4) are inserted into the wire connection through holes (11) by elastic deformation, and the elastic connecting piece (3) is fixed to the coil (1) and the circuit board (2) respectively when the quick-connection assemblies (4) at both ends of the elastic connecting piece (3) are inserted into the wire connection through holes (11).

7. A coil connection structure for a Coriolis mass flow sensor as described in claim 6 wherein: The quick-connection assembly (4) comprises a first connecting head (41), elastic pieces (42) and clamping heads (43), the first connecting head (41) is connected to the end of the elastic connecting piece (3), the elastic pieces (42) are arranged in a circumferential array, the elastic pieces (42) are connected to the side of the first connecting head (41) away from the elastic connecting piece (3), the clamping heads (43) are arranged one by one on the ends of the elastic pieces (42) away from the first connecting head (41), and the clamping heads (43) and the first connecting head (41) can be attached to the coil (1) or the circuit board (2) when the elastic pieces (42) are inserted into the wire connection through holes (11).

8. A coil connection structure for a Coriolis mass flow sensor as described in claim 6 wherein: The quick-connection assembly (4) comprises a second connecting head (44), a connecting rod (45) and elastic clamping pieces (46), the second connecting head (44) is connected to the end of the elastic connecting piece (3), one end of the connecting rod (45) is connected to the side of the second connecting head (44) away from the elastic connecting piece (3), the elastic clamping pieces (46) are arranged in a diverging manner, one end of the elastic clamping pieces (46) close to the diverging center is connected to the end of the connecting rod (45) away from the second connecting head (44), one end of the elastic clamping pieces (46) away from the connecting rod (45) can abut against the coil (1) or the circuit board (2), and the second connecting head (44) can be attached to the coil (1) or the circuit board (2) when the connecting rod (45) is inserted into the wire connection through holes (11).

9. A coil connection structure for a Coriolis mass flow sensor according to claim 1 wherein: the coil connection structure is formed by a single piece of material. The circuit board (2) is connected with a hinged ball (5), the hinged ball (5) is sleeved with a hinged shell (6), the hinged shell (6) is connected with a support (7), the hinged ball (5) and the hinged shell (6) make the circuit board (2) and the support (7) ball hinge connection, the hinged shell (6) is screw threaded with a first fixing bolt (61), the first fixing bolt (61) is used for abutting on the hinged ball (5) to fix the hinged ball (5) and the hinged shell (6), the support (7) is away from the hinged shell (6) one end is provided with a waist-shaped hole (71), the waist-shaped hole (71) is slidably provided with a second fixing bolt (8), the second fixing bolt (8) is screw threaded with a fixed support plate (9), the fixed support plate (9) is connected on the shell of the coriolis mass flow sensor.

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