Coriolis mass flow sensor and mass flow meter

Abstract

The utility model discloses a Coriolis mass flow sensor and a mass flow meter. The Coriolis mass flow sensor comprises a shell and a dislocation connecting device, a connecting piece is installed on the shell, flow dividing heads are arranged at the two ends of the connecting piece, and a pair of measuring pipes is installed in the shell. The staggered connecting device is mounted on the two-end shunting heads and comprises a fixed joint, a staggered connector is rotatably arranged on the fixed joint, a connecting flange and a rotating head are fixed to the two ends of the staggered connector respectively, the rotating head is rotatably arranged in the fixed joint, the connecting flange and the rotating head form an eccentric structure, and a plurality of insertion holes are formed in the fixed joint. Connecting rods are slidably arranged in the inserting holes, pressing heads are fixed to the ends, close to the rotating head, of the multiple connecting rods, threaded heads are fixed to the ends, close to the connecting piece, of the multiple connecting rods, and a threaded sleeve is rotatably arranged on the fixed connector. Through the related structural design, the sensor can be suitable for the positions where the two ends of the pipeline are not flush.

Description

Technical Field

[0001] This utility model belongs to the field of mass flow meter technology, specifically relating to a Coriolis mass flow sensor and a mass flow meter. Background Technology

[0002] The Coriolis mass flow sensor is a high-precision flow measurement instrument designed based on the Coriolis effect principle. It is mainly used to directly measure the mass flow rate of fluids (liquid, gas, or multiphase flow), and can also measure parameters such as fluid density and temperature. When the fluid being measured flows through the vibrating tube inside the sensor, the vibrating tube vibrates periodically under electromagnetic drive. Due to the Coriolis force, the fluid causes the vibrating tube to twist and deform as it flows along the pipe. The degree of twisting is proportional to the mass flow rate of the fluid. By detecting the phase difference, frequency change, or amplitude change of the vibrating tube, the mass flow rate of the fluid can be calculated.

[0003] To ensure measurement accuracy and stable equipment operation, Coriolis mass flow sensors must be installed horizontally or vertically. However, in actual use, some connecting pipes are not on the same vertical or horizontal straight line. If they are installed without adjustment, the sensor measurement will be inaccurate. Therefore, operators need to adjust the pipes, which makes the installation time-consuming and labor-intensive.

[0004] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a Coriolis mass flow sensor and a mass flow meter.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a Coriolis mass flow sensor and a mass flow meter that can solve the problem that existing sensors cannot be used when the two ends of the connection port are not aligned during installation.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides a Coriolis mass flow sensor, comprising: a housing and a misaligned connection device;

[0008] A connector is installed on the outer casing, and a shunt head is provided at both ends of the connector. A pair of measuring tubes are installed inside the outer casing. Two pairs of shunt tubes connected to both ends of the pair of measuring tubes are fixed on the connector. A pair of exciters and two pairs of sensors are installed on the pair of measuring tubes.

[0009] The misaligned connection device is installed on the two-end splitter heads. The misaligned connection device includes a fixed joint, on which a misaligned connection head is rotatably disposed. A connecting flange and a rotating head are respectively fixed at both ends of the misaligned connection head. The rotating head rotates in the fixed joint. The connecting flange and the rotating head form an eccentric structure. The fixed joint has multiple insertion holes. A connecting rod is slidably disposed in the insertion holes. A pressure head is fixed at one end of each of the multiple connecting rods near the rotating head. A threaded head is fixed at one end of each of the multiple connecting rods near the connecting part. A threaded sleeve is rotatably disposed on the fixed joint. The threaded sleeve and the threaded head are threadedly connected.

[0010] In one or more embodiments of this utility model, a first mounting base is fixed at the middle position of each pair of measuring tubes, and the exciter is mounted on the first mounting base. The first mounting base is used to install the exciter and to install the exciter at the middle position of the measuring tube, so that the exciter uniformly drives the pair of measuring tubes to shake.

[0011] In one or more embodiments of this utility model, two pairs of second mounting seats are fixed at both corners of a pair of measuring tubes. The sensor is mounted on the second mounting seat. The second mounting seat is used to mount the sensor and to mount the sensor at the corner of the measuring tube, which is beneficial for better monitoring of the amplitude and frequency of vibration.

[0012] In one or more embodiments of this utility model, positioning elements are installed on both ends of the pair of measuring tubes to ensure that the pair of measuring tubes remain parallel within the housing.

[0013] In one or more embodiments of this utility model, a connector is mounted on the connector, and the connector is used to mount a transmitter.

[0014] In one or more embodiments of this utility model, corresponding sealing ring grooves are chiseled in both the fixed joint and the rotating head, and sealing rings are installed in the sealing ring grooves, which serve a sealing function.

[0015] In one or more embodiments of this utility model, a plurality of pulleys are installed on the outer wall of the rotating head, and the pulleys assist the rotating head in rotating within the fixed joint.

[0016] In one or more embodiments of this utility model, a circular slide rail is fixed on the fixed joint, and a circular groove adapted to the circular slide rail is chiseled on the threaded sleeve. The circular groove slides on the circular slide rail, thereby realizing the rotational setting between the threaded sleeve and the fixed joint.

[0017] In one or more embodiments of this utility model, a pressure block is fixed on the side of the pressure head near the rotating head. The pressure block is used to press on the rotating head and plays a buffering role to prevent damage to the surface of the rotating head when pressure is applied to the rotating head.

[0018] A mass flow meter comprising the Coriolis mass flow sensor described above.

[0019] Compared with the prior art, this utility model, through its related structural design, enables the sensor to be applied to locations where the two ends of a pipe connection are not aligned. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a Coriolis mass flow sensor according to one embodiment of the present invention;

[0022] Figure 2 This is a rear-view perspective view of a Coriolis mass flow sensor according to an embodiment of the present invention;

[0023] Figure 3 This is an unfolded view of the misaligned connection device in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the misaligned connector in one embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the fixed connector in one embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the threaded sleeve in one embodiment of the present invention;

[0027] Figure 7 This is a first state diagram of the misaligned connector in one embodiment of the present invention.

[0028] Figure 8 This is a second state diagram of the misaligned connector in one embodiment of the present invention.

[0029] Explanation of key figure labels:

[0030] 1-Outer shell, 101-Connector, 102-Diverter head, 103-Diverter tube, 104-Measuring tube, 105-First mounting base, 106-Actuator, 107-Second mounting base, 108-Sensor, 109-Positioning component, 110-Connector, 2-Misaligned connection device, 201-Fixed joint, 202-Misaligned connection head, 203-Connecting flange, 204-Rotating head, 205-Insertion hole, 206-Connecting rod, 207-Threaded head, 208-Pressure block, 209-Threaded sleeve, 210-Sealing ring groove, 211-Sealing ring, 212-Pulley, 213-Circular slide groove, 214-Circular slide rail, 215-Pressure head, 216-First included angle, 217-Second included angle, 218-Third included angle, 219-Fourth included angle. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] like Figures 1 to 8 As shown, a Coriolis mass flow sensor according to one embodiment of the present invention includes: a housing 1 and a misaligned connection device 2.

[0033] like Figures 1 to 2 As shown, a connector 101 is installed on the outer casing 1. A diverter head 102 is provided at both ends of the connector 101. A pair of measuring tubes 104 are installed inside the outer casing 1. Two pairs of diverter tubes 103 connected to both ends of the pair of measuring tubes 104 are fixed on the connector 101. A pair of exciters 106 and two pairs of sensors 108 are installed on the pair of measuring tubes 104. Liquid or gas is diverted through the diverter head 102 and flows into the pair of measuring tubes 104 through the pair of diverter tubes 103. The exciter 106 drives the pair of measuring tubes 104 to move. The amplitude and frequency of the swing of the measuring tubes 104 are captured by the two pairs of sensors 108.

[0034] like Figures 1 to 2As shown, a first mounting base 105 is fixed at the middle position of each pair of measuring tubes 104. An exciter 106 is mounted on the first mounting base 105. The first mounting base 105 is used to mount the exciter 106, and the exciter 106 is mounted at the middle position of the measuring tubes 104, so that the exciter 106 uniformly drives the pair of measuring tubes 104 to shake. Two pairs of second mounting bases 107 are fixed at both corners of each pair of measuring tubes 104. Sensors 108 are mounted on the second mounting bases 107. The second mounting bases 107 are used to mount the sensors 108, and the sensors 108 are mounted at the corners of the measuring tubes 104, which is beneficial for better monitoring of the amplitude and frequency of vibration.

[0035] like Figures 1 to 2 As shown, positioning elements 109 are installed near both ends of a pair of measuring tubes 104. The positioning elements 109 are used to ensure that the pair of measuring tubes 104 remain parallel within the housing 1. A connector 110 is installed on the connector 101, and a transmitter is mounted on the connector 110.

[0036] like Figures 2 to 3 As shown, the misaligned connection device 2 is installed on the two-end diverter head 102. The misaligned connection device 2 includes a fixed joint 201, on which the misaligned connection head 202 is rotatably mounted. The two ends of the misaligned connection head 202 are respectively fixed with a connecting flange 203 and a rotating head 204. The rotating head 204 rotates in the fixed joint 201. The connecting flange 203 and the rotating head 204 form an eccentric structure. By rotating the misaligned connection head 202, the eccentric angle of the connecting flange 203 at both ends is adjusted, so that the connecting flange 203 at both ends is connected to the connecting pipe at both ends, thereby allowing the sensor to be installed in a horizontal or vertical state.

[0037] like Figures 2 to 3 As shown, the fixed joint 201 has multiple insertion holes 205, and a connecting rod 206 is slidably disposed in the insertion holes 205. A pressure head 215 is fixed to one end of each connecting rod 206 near the rotating head 204. A threaded head 207 is fixed to one end of each connecting rod 206 near the connector 101. A threaded sleeve 209 is rotatably disposed on the fixed joint 201. The threaded sleeve 209 and the threaded head 207 are threadedly connected. The pressure head 215 is used to lock the rotating head 204 in the fixed joint 201. By rotating the threaded sleeve 209, the rotation of the threaded sleeve 209 drives the threaded head 207 to move. The threaded head 207 drives the pressure head 215 to move through the connecting rod 206, thereby realizing the pressing or releasing of the rotating head 204.

[0038] like Figures 3 to 6As shown, corresponding sealing ring grooves 210 are carved in both the fixed joint 201 and the rotating head 204. A sealing ring 211 is installed in the sealing ring groove 210, and the sealing ring 211 serves a sealing function. Multiple pulleys 212 are installed on the outer wall of the rotating head 204, and the pulleys 212 assist the rotating head 204 in rotating within the fixed joint 201.

[0039] like Figures 3 to 6 As shown, a circular slide rail 214 is fixed on the fixed joint 201, and a circular groove 213 adapted to the circular slide rail 214 is carved on the threaded sleeve 209. The circular groove 213 slides on the circular slide rail 214, thereby realizing the rotational setting between the threaded sleeve 209 and the fixed joint 201. A pressure block 208 is fixed on the side of the pressure head 215 near the rotating head 204. The pressure block 208 is used to press on the rotating head 204 and plays a buffering role to prevent damage to the surface of the rotating head 204 when pressure is applied to the rotating head 204.

[0040] like Figure 7 As shown, if the two pipes need to be connected on the same straight line, simply adjust the connecting flanges 203 at both ends to the same axial position. If the two pipes to be connected have different vertical heights, first loosen the annular slide rail 214 with the pressure head 215, then rotate the misaligned connector 202 to rotate the connecting flanges 203 at both ends to the same position. Figure 7 As shown, the first included angle 216 and the second included angle 217 are the same, so that the height difference between the axial centers of a pair of connecting flanges 203 is equal to the height difference between the two pipes.

[0041] like Figure 8 As shown, when the vertical height and horizontal distance of the two pipes to be connected are not equal, first loosen the annular slide rail 214 with the pressure head 215, then rotate the misaligned connector 202 to rotate the connecting flanges 203 at both ends to the desired alignment. Figure 8 As shown, the included angles 218 and 219 are the same, so that the height difference and left-right distance difference of the axial center of the pair of connecting flanges 203 are equal to the height difference and left-right distance difference of the pipes at both ends.

[0042] In one embodiment of this utility model, a mass flow meter is also provided, including the Coriolis mass flow sensor described above.

[0043] Working principle: When using this device, first measure whether the axis of the pipes at both ends is on the same straight line. If it is on the same straight line, adjust the connecting flanges 203 at both ends to the same axis position, and then connect the connecting flanges 203 to the pipes at both ends.

[0044] If the axes of the pipes at both ends are not on the same straight line, first determine the vertical height difference and horizontal distance difference of the pipes at both ends, and then adjust the position of the connecting flange 203. When adjusting, first rotate the threaded sleeves 209 at both ends. The rotation of the threaded sleeves 209 drives the threaded head 207 to move towards the connecting flange 203. The threaded head 207 drives the connecting rod 206 and the pressure head 215 to move, so that the pressure head 215 drives the pressure block 208 to release from the rotating head 204. Then rotate the misaligned connecting head 202 to adjust the eccentric angle of the connecting flanges 203 at both ends, so that the vertical height difference and horizontal distance difference of the axis of the pair of connecting flanges 203 are equal to the vertical height difference and horizontal distance difference of the pipes at both ends. After the adjustment is completed, rotate the threaded sleeve 209 again. The threaded sleeve 209 drives the threaded head 207 to move towards the connecting part 101. The threaded head 207 drives the pressure head 215 towards one end of the rotating head 204 through the connecting rod 206, locking the rotating head 204 in the fixed joint 201. Then the connecting flanges 203 at both ends can be connected to the pipes.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A Coriolis mass flow sensor characterized by, include: The housing has a connector installed on it, and a shunt head is provided at both ends of the connector. A pair of measuring tubes are installed inside the housing. Two pairs of shunt tubes connected to both ends of the pair of measuring tubes are fixed on the connector. A pair of exciters and two pairs of sensors are installed on the pair of measuring tubes. A misaligned connection device is installed on two branch heads. The misaligned connection device includes a fixed joint, on which a misaligned connection head is rotatably mounted. A connecting flange and a rotating head are fixed at both ends of the misaligned connection head, respectively. The rotating head rotates within the fixed joint. The connecting flange and the rotating head form an eccentric structure. The fixed joint has multiple insertion holes, in which connecting rods are slidably mounted. A pressure head is fixed to one end of each connecting rod near the rotating head. A threaded head is fixed to one end of each connecting rod near the connecting part. A threaded sleeve is rotatably mounted on the fixed joint, and the threaded sleeve and the threaded head are threadedly connected.

2. The Coriolis mass flow sensor according to claim 1, characterized in that, Each of the two measuring tubes has a first mounting base fixed at its middle position, and the exciter is mounted on the first mounting base.

3. A Coriolis mass flow sensor according to claim 2 wherein, Two pairs of second mounting bases are fixed at both corners of the measuring tube, and the sensor is mounted on the second mounting base.

4. A Coriolis mass flow sensor according to claim 1 wherein, Positioning elements are installed near both ends of the pair of measuring tubes.

5. A Coriolis mass flow sensor according to claim 1 wherein, The connector is equipped with a connector head.

6. A Coriolis mass flow sensor according to claim 1 wherein, Both the fixed joint and the rotating head have corresponding sealing ring grooves, and sealing rings are installed in the sealing ring grooves.

7. A Coriolis mass flow sensor according to claim 1 wherein, Multiple pulleys are installed on the outer wall of the rotating head.

8. A Coriolis mass flow sensor according to claim 1 wherein, The fixed joint is equipped with a circular slide rail, and the threaded sleeve is provided with a circular slide groove that matches the circular slide rail. The circular slide groove slides on the circular slide rail.

9. A Coriolis mass flow sensor according to claim 1 wherein, A pressure block is fixed to the side of the pressure head near the rotating head.

10. A mass flow meter characterized by, Including the Coriolis mass flow sensor as described in any one of claims 1-9.

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