Direct drive type vibration tube density measuring device

Abstract

The utility model discloses a direct drive type vibration tube density measuring device, and relates to the technical field of densimeters. A flow adjusting valve is arranged between the two communicating pipes, water guide pipes are fixedly connected to the outer side walls of the communicating pipes, the water guide pipes are communicated with the communicating pipes, the water guide pipes are in a funnel shape, the upper ends of the water guide pipes are rotationally connected with rotary connecting pipes, a vibrating pipe is arranged above the supporting frame, and a driving mechanism is arranged between the supporting frame and the vibrating pipe. During use, the main pipe can be connected with vibration pipes with different inner diameters through the internal thread connecting holes with different inner diameters, when the density of liquid with the density needing to be measured in the main pipe exceeds the measuring range of an original vibration pipe, only the rotating connecting pipe needs to be rotated to take down the vibration pipe and replace the vibration pipe meeting the requirement, operation is more convenient, and time and labor are saved. The current flow speed and flow of the liquid are adjusted through the flow adjusting valve, it is guaranteed that the liquid can smoothly enter the vibration pipe, and then the accuracy of the detection device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of density meters, in particular to a direct-driven vibration tube density measuring device. Background Art

[0002] The direct-drive vibrating tube density measuring device is a device used to measure the density of liquids. When liquids pass through a U-shaped tube, due to different densities of the liquids, the liquids will have different effects on the vibration frequency and amplitude of the U-shaped tube. By measuring the changes in the vibration frequency and amplitude of the U-shaped tube, the density of the liquid can be calculated;

[0003] The vibrating tube in the existing direct-driven vibrating tube density measuring device is not easy to disassemble. However, since most vibrating tubes of different sizes correspond to different measuring ranges, when the liquid in the measuring pipeline changes, the entire device needs to be replaced, which is cumbersome to operate. The existing device is not provided with a corresponding flow rate control mechanism, which may result in no flow in the U-tube when the flow rate in the main pipeline is too fast, thereby affecting the accurate measurement of the density meter. In response to the above problems, the present application proposes a direct-driven vibrating tube density measuring device. Utility Model Content

[0004] The utility model aims to provide a direct-driven vibration tube density measuring device, which solves the technical problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a directly driven vibration tube density measuring device, comprising a connecting tube, two connecting tubes are provided, a flow regulating valve is provided between the two connecting tubes, an adjusting knob is provided on the flow regulating valve, the two connecting tubes are connected through the flow regulating valve, and the ends of the two connecting tubes away from each other are both provided with connecting flanges, a support frame is provided above the flow regulating valve, the support frame is U-shaped, and the lower ends of the left and right side walls of the support frame are respectively fixed to the outer side walls of the left and right connecting tubes The connecting pipe is connected with a water pipe fixedly connected to the outer wall of the connecting pipe, the water pipe is connected with the connecting pipe, the water pipe is funnel-shaped, the inner diameter of one end of the water pipe away from the connecting pipe is smaller than the inner diameter of the connecting point between the water pipe and the connecting pipe, the upper end of the water pipe is rotatably connected with a rotating connecting pipe, a vibration pipe is arranged above the support frame, the vibration pipe is U-shaped, and the two lower ports of the vibration pipe extend to the inner sides of the rotating connecting pipes on the left and right sides respectively, a driving mechanism is arranged between the support frame and the vibration pipe, and a vibration frequency detection device is arranged on the vibration pipe.

[0006] Preferably, a sealing ring is provided between the water conduit and the rotating connecting pipe, a plurality of internal threaded connecting holes are provided on the inner side of the rotating connecting pipe, and both lower ports of the vibration tube are fixedly connected with external threaded connecting pipes, which are adapted to the internal threaded connecting holes.

[0007] Preferably, the inner diameters of the plurality of internal threaded connection holes are arranged to decrease from top to bottom.

[0008] Preferably, the driving mechanism includes a fixed plate, a permanent magnet, a coil and an iron core, the left and right ends of the fixed plate are provided with fixed grooves, the left and right vertical tube parts of the vibration tube are respectively located in the left and right fixed grooves, the front and rear ends of the fixed plate are fixedly connected with permanent magnets, the coil is fixed to the upper end of the support frame, the coil is located between the two permanent magnets, the iron core is located between the coils, auxiliary plates are provided on the front and rear sides of the coil, the auxiliary plates are fixed to the upper end of the support frame, the front and rear ends of the iron core respectively pass through the front and rear auxiliary plates and are respectively close to the front and rear permanent magnets, and the auxiliary plates are insulating material plates.

[0009] Preferably, fixed abutment plates are symmetrically arranged in the front-to-back direction in the fixed groove, and adjacent side walls of the two fixed abutment plates are provided with protective pads. The fixed abutment plates are arc-shaped, and fixing bolts are arranged on the front and rear sides of the fixed groove. One end of the fixing bolt close to the fixed groove passes through the side wall of the fixed groove and is rotatably connected to the side wall of the fixed abutment plate. The fixing bolt is threadedly connected to the side wall of the fixed groove.

[0010] Compared with the related art, the direct-drive vibration tube density measuring device provided by the utility model has the following beneficial effects:

[0011] 1. The utility model provides a direct-driven vibration tube density measuring device. In the device, water pipes are fixedly connected to the left and right connecting pipes. One end of the water pipe away from the connecting pipe is rotatably connected to a rotating connecting pipe. A plurality of internal threaded connecting holes are arranged on the inner side of the rotating connecting rod, and the inner diameters of the plurality of internal threaded connecting holes are arranged to decrease from top to bottom. When in use, the internal threaded connecting holes with different inner diameters can be used to connect to vibration tubes with different inner diameters. When the density of the liquid to be measured in the main pipe exceeds the measuring range of the original vibration tube, it is only necessary to rotate the rotating connecting pipe to remove the vibration tube and replace it with a vibration tube that meets the requirements. The operation is more convenient without the need to disassemble the entire device. The driving mechanism in the device can be disassembled, which is more convenient for replacing the vibration tube.

[0012] 2. The utility model provides a direct-driven vibration tube density measuring device. In the device, a flow regulating valve is arranged between two connecting tubes, and a funnel-shaped water guide tube is arranged between the vibration tube and the connecting tube. When the liquid flow rate in the connecting tube is too fast, resulting in abnormal liquid flow in the vibration tube, it is only necessary to turn the adjustment knob to adjust the current flow rate and flow of the liquid to ensure that the liquid can smoothly enter the vibration tube, thereby ensuring the accuracy of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0015] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0016] Figure 4 It is a three-dimensional structural diagram of the fixing rod position of the utility model;

[0017] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0018] Figure 6 It is a schematic cross-sectional view of the driving structure position of the utility model;

[0019] Figure 7 It is a schematic diagram of the three-dimensional structure of the vibration tube of the utility model.

[0020] In the figure: 1. connecting pipe; 2. flow control valve; 3. adjusting knob; 4. connecting flange; 5. water guide pipe; 6. rotating connecting pipe; 7. internal thread connecting hole; 8. vibration pipe; 9. external thread connecting pipe; 10. vibration frequency detection device; 11. support frame; 12. fixing plate; 13. permanent magnet; 14. coil; 15. auxiliary plate; 16. iron core; 17. fixing groove; 18. fixed abutment plate; 19. fixing bolt. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-7The utility model provides a technical solution: a direct-driven vibration tube density measuring device, comprising a connecting pipe 1, two connecting pipes 1 are provided, a flow regulating valve 2 is provided between the two connecting pipes 1, an adjusting knob 3 is provided on the flow regulating valve 2, the two connecting pipes 1 are connected through the flow regulating valve 2, and the ends of the two connecting pipes 1 away from each other are both provided with a connecting flange 4, a supporting frame 11 is provided above the flow regulating valve 2, the supporting frame 11 is U-shaped, and the lower ends of the left and right side walls of the supporting frame 11 are respectively fixedly connected to the outer side walls of the left and right two connecting pipes 1, and the connecting A water pipe 5 is fixedly connected to the outer wall of the through pipe 1, and the water pipe 5 is connected with the connecting pipe 1. The water pipe 5 is funnel-shaped, and the inner diameter of the end of the water pipe 5 away from the connecting pipe 1 is smaller than the inner diameter of the connection point between the water pipe 5 and the connecting pipe 1. The upper end of the water pipe 5 is rotatably connected with a rotating connecting pipe 6. A vibration pipe 8 is arranged above the support frame 11. The vibration pipe 8 is U-shaped, and the two lower ports of the vibration pipe 8 extend to the inner sides of the rotating connecting pipes 6 on the left and right sides respectively. A driving mechanism is arranged between the support frame 11 and the vibration pipe 8, and a vibration frequency detection device 10 is arranged on the vibration pipe 8;

[0023] A sealing ring is provided between the water pipe 5 and the rotating connecting pipe 6. A plurality of internal thread connecting holes 7 are provided on the inner side of the rotating connecting pipe 6. Both lower ends of the vibration pipe 8 are fixedly connected with external thread connecting pipes 9, which are matched with the internal thread connecting holes 7.

[0024] The inner diameters of the plurality of internal thread connection holes 7 are arranged to decrease from top to bottom. The arrangement of the plurality of internal thread connection holes 7 ensures that the device can be connected with vibration tubes 8 of different inner diameters. When the density of the liquid to be measured in the main pipe exceeds the measurement range of the original vibration tube 8, it is only necessary to rotate the connection tube 6 to remove the vibration tube 8 and replace it with a vibration tube 8 that meets the requirements, which is more convenient to operate.

[0025] The driving mechanism includes a fixed plate 12, a permanent magnet 13, a coil 14 and an iron core 16. The left and right ends of the fixed plate 12 are provided with a fixed groove 17. The left and right vertical pipe parts of the vibration tube 8 are respectively located in the left and right fixed grooves 17. The front and rear ends of the fixed plate 12 are fixedly connected with the permanent magnet 13. The coil 14 is fixed to the upper end of the support frame 11. The coil 14 is located between the two permanent magnets 13. The iron core 16 is located between the coils 14. Auxiliary plates 15 are provided on the front and rear sides of the coil 14. The auxiliary plates 15 are fixed to the upper end of the support frame 11. The front and rear ends of the iron core 16 are The coil 14 passes through the front and rear auxiliary plates 15 respectively, and is close to the front and rear permanent magnets 13 respectively. The auxiliary plates 15 are insulating material plates. When in use, the coil 14 is externally connected to alternating current, and cooperates with the iron core 16 under the action of the coil 14 to form an electromagnet. At the same time, under the action of alternating current, the motor of the electromagnet constantly changes, and cooperates with the front and rear permanent magnets 13, thereby driving the vibration tube 8 to vibrate. During the vibration of the vibration tube 8, the vibration frequency detection device 10 is used to detect the vibration frequency. By measuring the changes in the vibration frequency and amplitude of the U-shaped tube, the density of the liquid can be calculated;

[0026] Fixed abutment plates 18 are symmetrically arranged in the front-to-back direction in the fixing groove 17, and the adjacent side walls of the two fixed abutment plates 18 are provided with protective cushions. The fixed abutment plates 18 are arc-shaped, and fixing bolts 19 are arranged on the front and rear sides of the fixing groove 17. The end of the fixing bolt 19 close to the fixing groove 17 passes through the side wall of the fixing groove 17 and is rotatably connected to the side wall of the fixing abutment plate 18. The fixing bolt 19 is threadedly connected to the side wall of the fixing groove 17. When in use, the fixing bolts 19 on the front and rear sides push the fixed abutment plate 18 toward the vibration tube 8, thereby achieving the position fixation between the vibration tube 8 and the fixing plate 12.

[0027] Working principle: When in use, the device is connected to the main pipeline through the connecting flanges 4 on the left and right sides, the pipeline valve is opened, and the liquid to be detected enters from the left connecting pipe 1. The main passage of the liquid is the two connecting pipes 1. At the same time, part of the liquid enters the vibration tube 8 through the water pipe 5, and is then introduced into the right connecting pipe 1 from the right port of the vibration tube 8. When the liquid to be detected passes through the vibration tube 8, the coil 14 is externally connected to alternating current, and under the action of the coil 14, it cooperates with the iron core 16 to form an electromagnet. At the same time, under the action of alternating current, the motor of the electromagnet changes continuously, and cooperates with the front and rear permanent magnets 13, thereby driving the vibration tube 8 to vibrate. During the vibration of the vibration tube 8, the vibration frequency detection device 10 is used to detect the vibration frequency. By measuring the vibration of the U-shaped tube The density of the liquid can be calculated by the changes in the vibration frequency and amplitude. When the density of the liquid to be measured in the main pipe exceeds the measurement range of the original vibration tube 8, it is only necessary to rotate the connecting pipe 6 to remove the vibration tube 8 and replace it with a vibration tube 8 that meets the requirements. The operation is more convenient and there is no need to disassemble the entire device. The driving mechanism in the device can be disassembled, which is more convenient for replacing the vibration tube 8. A flow regulating valve 2 is arranged between the two connecting pipes 1, and a funnel-shaped water guide pipe 5 is arranged between the vibration tube 8 and the connecting pipe 1. When the liquid flow rate in the connecting pipe 1 is too fast, resulting in abnormal liquid flow in the vibration tube 8, it is only necessary to rotate the adjusting knob 3 to adjust the current flow rate and flow of the liquid to ensure that the liquid can smoothly enter the vibration tube 8, thereby ensuring the accuracy of the detection device.

Claims

1. A direct-drive vibration tube density measuring device, comprising a connecting tube (1), characterized in that: Two connecting pipes (1) are provided, a flow regulating valve (2) is provided between the two connecting pipes (1), an adjusting knob (3) is provided on the flow regulating valve (2), the two connecting pipes (1) are connected through the flow regulating valve (2), a connecting flange (4) is provided at one end of the two connecting pipes (1) away from each other, a supporting frame (11) is provided above the flow regulating valve (2), the supporting frame (11) is U-shaped, the lower ends of the left and right side walls of the supporting frame (11) are respectively fixedly connected to the outer side walls of the left and right connecting pipes (1), a water guide pipe (5) is fixedly connected to the outer side wall of the connecting pipe (1), and the water guide pipe (5) is provided on the outer side wall of the connecting pipe (1). The water pipe (5) is connected with the connecting pipe (1), the water pipe (5) is funnel-shaped, the inner diameter of one end of the water pipe (5) away from the connecting pipe (1) is smaller than the inner diameter of the connecting portion of the water pipe (5) and the connecting pipe (1), the upper end of the water pipe (5) is rotatably connected with a rotating connecting pipe (6), a vibration pipe (8) is arranged above the support frame (11), the vibration pipe (8) is U-shaped, and two lower ends of the vibration pipe (8) extend to the inner sides of the rotating connecting pipes (6) on the left and right sides respectively, a driving mechanism is arranged between the support frame (11) and the vibration pipe (8), and a vibration frequency detection device (10) is arranged on the vibration pipe (8).

2. A direct drive vibration tube density measuring device according to claim 1, characterized in that: A sealing ring is provided between the water guide pipe (5) and the rotating connecting pipe (6); a plurality of internal thread connecting holes (7) are provided on the inner side of the rotating connecting pipe (6); both lower ends of the vibration pipe (8) are fixedly connected with external thread connecting pipes (9); and the external thread connecting pipes (9) are adapted to the internal thread connecting holes (7).

3. A direct drive vibration tube density measuring device according to claim 2, characterized in that: The inner diameters of the plurality of internal thread connection holes (7) are arranged to decrease from top to bottom.

4. A direct drive vibration tube density measuring device according to claim 1, characterized in that: The driving mechanism comprises a fixing plate (12), a permanent magnet (13), a coil (14) and an iron core (16). The fixing plate (12) is provided with a fixing groove (17) at both left and right ends. The vertical tube parts on the left and right sides of the vibration tube (8) are respectively located in the two fixing grooves (17) at the left and right ends. The front and rear ends of the fixing plate (12) are fixedly connected with the permanent magnet (13). The coil (14) is fixed to the upper end of the support frame (11). The coil (14) is located between the two permanent magnets (13). The iron core (16) is located between the coils (14). Auxiliary plates (15) are provided on the front and rear sides of the coil (14). The auxiliary plates (15) are fixed to the upper end of the support frame (11). The front and rear ends of the iron core (16) respectively pass through the front and rear auxiliary plates (15) and are respectively close to the front and rear permanent magnets (13). The auxiliary plates (15) are insulating material plates.

5. A direct drive vibration tube density measuring device according to claim 4, characterized in that: Fixed abutment plates (18) are symmetrically arranged in the front-to-back direction in the fixed groove (17); adjacent side walls of the two fixed abutment plates (18) are provided with protective cushions; the fixed abutment plates (18) are arc-shaped; fixed bolts (19) are arranged on both the front and rear sides of the fixed groove (17); one end of the fixed bolt (19) close to the fixed groove (17) passes through the side wall of the fixed groove (17) and is rotatably connected to the side wall of the fixed abutment plate (18); the fixed bolt (19) is threadedly connected to the side wall of the fixed groove (17).

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