CN110879085A

CN110879085A - Floating ball-torsion spring type liquid level and flow rate online detection device

Info

Publication number: CN110879085A
Application number: CN201911343302.8A
Authority: CN
Inventors: 李思辰; 周明连; 董红; 王增义; 于丽昕; 王欢欢; 杨超; 徐克举; 赵东方; 闫睿; 关萍; 张俊杰
Original assignee: Beijing Beipai Technology Co Ltd; Beijing Drainage Group Co Ltd
Current assignee: Beijing Beipai Technology Co Ltd; Beijing Drainage Group Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-03-13

Abstract

The invention provides a floating ball-torsion spring type liquid level and flow rate online detection device, which comprises: a control circuit comprising a processing unit and a communication unit; the first rotation angle sensor and the second rotation angle sensor are respectively in communication connection with the processing unit, the acquired signal data are sent to the processing unit for calculation, and calculation results are sent out through the communication unit; the swing rod is connected to the fixing plate through a first corner sensor pivot, and the floating ball is connected to the swing rod through a second corner sensor pivot. The floating ball-torsion spring type liquid level and flow velocity online detection device can be used for carrying out remote data transmission and real-time online monitoring, and is simple and convenient to install and low in installation and maintenance cost.

Description

Floating ball-torsion spring type liquid level and flow rate online detection device

Technical Field

The invention belongs to the field of detection, relates to drainage pipeline liquid level flow velocity detection equipment, and particularly relates to a floating ball-torsion spring type liquid level flow velocity online detection device.

Background

The drainage pipeline has a harsh internal environment and changeable water flow conditions, has strict use requirements on the pipeline flowmeter, and has strong applicability mainly including strong anti-interference capability and can resist the interference of impurities in water. In addition, the space of the drainage pipeline is narrow, the places for installation are mainly various wells, and the water level flow velocity meter is expected to have low requirement on the installation space and be easy to fix. Thirdly, the use cost is required to be low, the device can be popularized in a large scale, and besides the price of the device, the installation cost and the later maintenance cost also need to be considered. But also needs to be able to perform remote data transmission and real-time online monitoring. In contrast to the above factors, the conventional flowmeters all have various defects and cannot meet the use requirements. For example, a rotor type flow velocity meter is easy to hang garbage firstly when in use; the Doppler flowmeter has strong waterproof and anti-fouling capability, but has high cost and cannot be popularized in a large area.

In order to solve the problem, the invention designs a floating ball-torsion spring type liquid level flow rate online detection device suitable for a drainage pipeline.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a floating ball-torsion spring type liquid level flow rate online detection device, which comprises:

a control circuit comprising a processing unit and a communication unit;

the first rotation angle sensor and the second rotation angle sensor are respectively in communication connection with the processing unit, the acquired signal data are sent to the processing unit for calculation, and calculation results are sent out through the communication unit;

the swing rod is connected to the fixing plate through a first corner sensor, and the floating ball is connected to the swing rod through a second corner sensor.

Further, the first and second rotation angle sensors include an encoder and a rotating shaft, and the encoder outputs an electric signal to mark a rotation angle when the rotating shaft rotates.

Further, the apparatus further comprises:

the first mounting seat is fixed on the fixing plate, and the first rotating angle sensor is fixedly mounted on the first mounting seat;

the first pin and the first connecting pipe are arranged on the first mounting seat, a rotating shaft of the first rotating angle sensor is fixedly penetrated in the first connecting pipe, the first connecting pipe is connected with the swing rod together, and the first pin is used as a shaft to rotate, so that the rotating shaft of the first rotating angle sensor rotates by a certain angle.

Furthermore, the device also comprises a swing rod connecting piece, wherein one end of the swing rod connecting piece is connected to the swing rod, and the other end of the swing rod connecting piece is connected to the first connecting pipe;

the first mounting seat is a rectangular seat with a U-shaped opening, and the width of the opening is matched with that of the swing rod connecting piece.

Further, the apparatus further comprises:

the second mounting seat is fixed on the oscillating rod, and the second corner sensor is fixedly mounted on the second mounting seat;

the second connecting pipe is connected with the floating ball and rotates by taking the second pin as a shaft, so that the rotating shaft of the second corner sensor rotates by a certain angle.

Furthermore, the device also comprises a first torsion spring and a second torsion spring which are respectively arranged at two ends of the second connecting pipe, so that the second connecting pipe generates moment when rotating around the second pin.

Furthermore, the device also comprises a floating ball connecting piece, wherein one end of the floating ball connecting piece is connected to the floating ball, and the other end of the floating ball connecting piece is connected to the second connecting pipe;

the second mounting seat is a rectangular seat with a rectangular opening, and the width of the opening is matched with the width of the floating ball connecting piece and the lengths of the first torsion spring and the second torsion spring.

Further, the control circuit further comprises a zero setting switch which is connected with the processing unit in a communication mode.

Furthermore, the control circuit also comprises a power supply for supplying power to the circuit module in the control circuit.

Further, the control circuit further comprises an electromagnetic relay and an electromagnetic relay interrupt switch;

the first and second rotation angle sensors are connected to the power supply through electromagnetic relays;

the electromagnetic relay interruption switch is in communication connection with the control unit and is used for controlling the on-off of the electromagnetic relay.

The floating ball-torsion spring type liquid level and flow velocity online detection device can be used for carrying out remote data transmission and real-time online monitoring, and is simple and convenient to install and low in installation and maintenance cost.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in greater detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic view of the overall structure of a floating ball-torsion spring type liquid level flow rate online detection device according to an embodiment of the invention.

Fig. 2 is a schematic view of an installation structure of a floating ball-torsion spring type liquid level flow rate online detection device according to an embodiment of the invention.

Fig. 3 is a cross-sectional view of a first mounting seat of the float-torsion spring type liquid level flow rate on-line detection device according to the embodiment of the invention.

Fig. 4 is a sectional view of a second mounting seat of the float-torsion spring type liquid level flow rate on-line detection device according to the embodiment of the invention.

Fig. 5 is a schematic view of a mounting seat fixing plate of the floating ball-torsion spring type liquid level flow rate online detection device according to the embodiment of the invention.

Fig. 6 is a schematic structural diagram of a floating ball of the floating ball-torsion spring type liquid level flow rate online detection device according to the embodiment of the invention.

Fig. 7 is an operation state diagram of the electric control of the floating ball-torsion spring type liquid level flow rate on-line detection device according to the embodiment of the invention.

Fig. 8 is an overall circuit diagram of a floating ball-torsion spring type liquid level flow rate online detection device according to an embodiment of the invention.

Reference numerals:

an electric cabinet box 1; a first aluminum profile 2; a second aluminum profile 3; a set screw 4; a fixed plate 5; a first mounting seat 6; a first rotation angle sensor 7; a swing link connecting piece 8; a floating ball connecting piece 9; a swing link 10; a connecting bolt 11; a floating ball 12; a second mount 13; a second rotational angle sensor 14; an inspection well 15; a first pin 16; a first connecting pipe 17; a second pin 18; a second connection pipe 19; a first torsion spring 20; a second torsion spring 21; a power supply 43; a processing unit 48; a zero switch 54; an electromagnetic relay interruption switch 53; a power switch 44; a multi-path power distribution board 45; a voltage divider module 46; an electromagnetic relay 49; a first voltage reduction module 47; a second voltage reduction module 50; a 4G module 51; RS232 to TTL module 52; a first row of nuts 58; a second row of nuts 57; a third row of nuts 60; a fourth row of female nuts 62; 5V row female end 55; GND2 row bus terminal 56; a first resistor 59; a second resistor 61; GND1 is shown at female terminal 63.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The utility model provides a floater-torsional spring formula liquid level velocity of flow on-line measuring device, the device includes:

a control circuit comprising a processing unit and a communication unit;

the swing rod is connected to the fixing plate through a first corner sensor pivot, and the floating ball is connected to the swing rod through a second corner sensor pivot.

Specifically, the floating ball floats on water, the water level rises and falls to enable the floating ball to rise and fall, and the swing rod connected with the floating ball to rotate, so that the first rotation angle sensor and the second rotation angle sensor rotate. The first and second rotation angle sensors include an encoder and a rotating shaft, the encoder outputs an electric signal to mark a rotation angle when the rotating shaft rotates, a signal measured by the first rotation angle sensor is used for providing water level data, and a signal measured by the second rotation angle sensor is used for calculating thrust applied to the floating ball, so that the flow rate is detected.

Further, the apparatus further comprises:

In the invention, the liquid level measuring process is as follows: and pressing the power switch to supply power to the whole control device. And manually pulling the initial position of the floating ball to be arranged at the bottommost part, measuring the initial included angle theta between the swing rod and the vertical direction, and then pressing a zero setting switch to set the current numerical value of the first rotation angle sensor to be 0. When the liquid level rises, the floating ball in the water can move upwards along with the liquid level. The floating ball connecting piece and the second mounting seat which are connected with the floating ball can move upwards to drive the swing rod and the swing rod connecting piece to rotate relatively by taking the first pin as a shaft, so that the rotating shaft of the first rotating angle sensor rotates by a certain angle.

The analog signal of the first rotating angle sensor is input into the processing unit to read the angle β in real time, the relation H between the rotated angle and the liquid level is Lcos theta-Lcos (theta + β) + H (the height of the liquid level H, the length of the L swing rod, the initial angle theta, the real-time measured rotated angle of β and the depth of the liquid level immersed in the floating ball) is converted in the processing unit to output the height of the liquid level, the data is uploaded to the cloud end through the unique ID address of the 4G module, the 4G module is in the form of creating a virtual serial port, and the remote PC end is in the form of reading the virtual serial port to monitor the liquid level in real time on line.

And (3) flow velocity measurement process: and pressing the power switch to supply power to the whole control device. The initial position of the floating ball is arranged at the lowest part, then the zero setting switch is pressed, and the numerical value of the second rotation angle sensor under the condition of no flow speed is set to be 0. When the flow velocity is high, the floating ball is pushed, and the floating ball connecting piece connected with the floating ball rotates relative to the second pin serving as the shaft, so that the rotating shaft of the second rotation angle sensor rotates by a certain angleAnd (4) degree. The analog signal of the second corner sensor is input into the processing unit to read the angle gamma in real time, and the thrust F borne by the floating ball can be obtained according to a formula F L1 (F: the thrust borne by the floating ball, L1: the distance from the floating ball to the second pin, r: the rotating angle of the floating ball and K: the spring constant of the torsion spring) that the torque borne by the floating ball is balanced with the torque borne by the torsion spring. The relationship between force and flow rate, F, is 0.5 Cpv²A (C: non-dimensional resistance coefficient, v: flow velocity, A: incident flow area of the object, and rho: fluid density) is converted into the output flow velocity in the processing unit. Data are uploaded to the cloud through the unique ID address of the 4G module, the 4G module is in a virtual serial port creating mode, and the remote PC end detects the flow rate in real time in an online mode by reading the virtual serial port.

To facilitate understanding of the solution of the embodiments of the present invention and the effects thereof, a specific application example is given below. It will be understood by those skilled in the art that this example is merely for the purpose of facilitating an understanding of the present invention and that any specific details thereof are not intended to limit the invention in any way.

This embodiment has designed a floater-torsional spring formula liquid level velocity of flow on-line measuring device, as shown in fig. 1 and fig. 2, contains electricity cabinet case 1, first aluminium alloy 2, second aluminium alloy 3 and fixed plate 5. Controlling means installs in electric cabinet case 1, and first aluminium alloy 2 and second aluminium alloy 3 are used for fixed electric cabinet case 1. The electric cabinet box 1 is fixed on the wall surface of the inspection well 15 through a fixing screw 4.

The fixed plate 5 is installed on the front panel of electric cabinet, and first mount pad 6 is fixed on fixed plate 5, and first corner sensor 7 fixed mounting is in on first mount pad 6. The second mounting seat 13 is fixed on the swing rod 10, and the second rotation angle sensor 14 is fixedly mounted on the second mounting seat 13.

Specifically, as shown in fig. 3, the first mounting seat 6 is a rectangular seat with a U-shaped opening, the width of the opening matches with the width of the swing link connector 8, and the first mounting seat is mounted on the fixing plate 5. As shown in fig. 5, the through hole m1 is matched with the screw hole a1 of the first mount 6. The threaded hole c1 is provided with a jackscrew for fixing the swing link connector 8 and the first connecting pipe 17 together. The swing rod connecting piece 8 is provided with an internal thread hole b1 which is convenient to be matched with the external thread at one end of the swing rod 10.

As shown in fig. 4, the second mounting seat 13 is a rectangular seat with a rectangular opening, and the width of the opening matches with the width of the ball float connector 9 and the lengths of the first torsion spring 20 and the second torsion spring 21. The threaded hole e1 and the swing link 10 are connected together by the connecting bolt 11 as shown in fig. 1 and 4. The screw hole f1 is provided with a jack screw for fixing the ball connector 9 and the second connecting pipe 19 together. The floating ball connecting piece 9 is provided with an internal threaded hole d1, so that the floating ball connecting piece can be conveniently installed with the floating ball 12.

The rotation angle sensor is a combination of an encoder and a rotating shaft, and when the rotating shaft rotates, the encoder outputs an electric signal to mark a rotation angle. The first rotation angle sensor 7 is fixed on the first mounting seat 6, as shown in fig. 3, the rotation shaft thereof is inserted into the first connecting pipe 17, and the first connecting pipe 17 and the swing link connecting piece 8 are fixed together by a jackscrew. Thus, the rotation of the swing link 10 will drive the rotation shaft of the first rotation angle sensor 7 to rotate. Similarly, the second rotation angle sensor 14 is fixed to the second mounting base 13, and as shown in fig. 4, its rotation shaft is inserted into the second connection pipe 19, and the second connection pipe 19 and the float ball connector 9 are fixed together by a jackscrew. Thus, the rotation of the floating ball 12 drives the rotation shaft of the second rotation angle sensor 14 to rotate.

As shown in fig. 1 and 6, the floating ball 12 may be a hollow sphere or an oval hollow sphere. Floating ball 12 floats on water and a segment of approximately 1/3 diameter is submerged in the water. The water level rises and falls to enable the floating ball 12 to rise and fall, so that the swing rod 10, the swing rod connecting piece 8, the floating ball connecting piece 9, the second mounting seat 13 and the rotating shaft of the first angle sensor which are connected with the floating ball rotate around the first pin 16 together, and the first angle sensor 7 gives water level data; the water flow velocity v gives a thrust to the floating ball 12, so that the floating ball connecting piece 9 and the rotating shaft of the second rotation angle sensor which are connected with the floating ball generate a moment around the second pin 18, the moment is balanced with the moment generated by the first torsion spring 20 and the second torsion spring 21, the thrust on the floating ball can be solved, and the flow velocity is detected.

Referring to fig. 7, the control device of the electric cabinet 1 includes a power supply 43, a processing unit 48, a 4G module 51, a zero switch 54, and an electromagnetic relay interrupt switch 53. The power supply 43 supplies power to the respective parts of the control device. The first rotation angle sensor 7 and the second rotation angle sensor 14 are in signal connection with the processing unit 48 via analog-to-digital conversion circuits. The 4G module 51, the zero switch 54 and the electromagnetic relay interrupt switch 53 are communicatively connected to the processing unit 48, respectively.

Referring to fig. 8, the control device of the electric cabinet 1 further includes a power switch 44, a multi-channel power distribution board 45, a voltage dividing module 46, an electromagnetic relay 49, a first voltage-reducing module 47, a second voltage-reducing module 50, an RS 232-to-TTL module 52, a first row of bus bars 58, a second row of bus bars 57, a third row of bus bars 60, a fourth row of bus bars 62, a 5V row of bus bars 55, a GND2 row of bus bars 56, a first resistor 59, a second resistor 61, and a GND1 row of bus bars 63, which jointly form an internal circuit.

Specifically, the positive pole of the power supply 43 is connected with the power switch 44, the power switch 44 is connected with the positive pole of the multi-path power distribution board 45, and the negative pole of the power supply 43 is connected with the negative pole of the multi-path power distribution board 45 for supplying power to the whole circuit control system.

The multi-path power supply distribution board 45 is divided into 4 paths, the first path VCC is connected with the anode of the voltage division module 46, and the GND is connected with the cathode of the voltage division module. The second path VCC is connected to the positive input terminal of the first voltage-reducing module 47, and GND is connected to the negative input terminal of the first voltage-reducing module 47. The third path VCC is connected with the positive input end of the second voltage reduction module 50, and the GND is connected with the negative input end of the second voltage reduction module 50. The fourth path VCC is connected to the anode of the 4G module 51, and GND is connected to the cathode of the 4G module 51.

The OUT terminal of the voltage dividing module 46 is connected with the A3 port of the processing unit 48, and the GND terminal is connected with the GND1 bus terminal 63. For detecting the remaining capacity of the power supply 43.

The OUT + of the first voltage-reducing module 47 is connected to the positive pole of the power supply of the processing unit 48, and the OUT-is connected to the negative pole of the power supply of the processing unit 48. For obtaining 12V power to power the processing unit 48.

The output of the second voltage-reducing module 50 is divided into four paths, the OUT + of the first path is connected with the VCC end of the electromagnetic relay 49, and the OUT-is connected with the GND end of the electromagnetic relay 49. The OUT + of the second path is connected with the 5V row female terminal 55, and the OUT-is connected with the GND1 row female terminal 63. The OUT + of the third path is terminated with the positive pole of the electromagnetic relay interrupt switch 53. The OUT + terminal of the fourth path is set to the positive terminal of the zero switch 54. The function is as follows: and 5v power supply is obtained to supply power to the electromagnetic relay 49, the electromagnetic relay interruption switch 53 and the zero setting switch 54.

The normally open end and the common end of the electromagnetic relay 49 output two paths, the first common end is connected with the 5V bus bar female end 55, and the normally open end is connected with the VCC end of the first rotation angle sensor 7. The second common terminal is connected with the 5V bus terminal 55, and the normally open terminal is connected with the VCC terminal of the second rotation angle sensor 14. The IN1 of the electromagnetic relay 49 is terminated to port No. 8 of the processing unit 48, and the IN2 of the electromagnetic relay 49 is terminated to port No. 9 of the processing unit 48. The power supply is used for controlling the power on and off of the first rotation angle sensor 7 and the second rotation angle sensor 14, and the electric quantity of the power supply is saved.

The TX port of the RS232 to TTL module 52 is connected to the TX0 port of the processing unit 48, the RX port of the RS232 to TTL module 52 is connected to the RX0 port of the processing unit 48, the VCC port of the RS232 to TTL module 52 is connected to the 5V row bus terminal 55, and the GND port of the RS232 to TTL module 52 is connected to the GND1 row bus terminal 63.

The OUT terminal of the first rotation angle sensor 7 is connected to the a1 port of the processing unit 48, and the GND terminal is connected to the GND1 bus terminal 63. For converting the liquid level by the rotating angle of the rotating shaft of the first rotating angle sensor 7.

The OUT terminal of the second rotation angle sensor 14 is connected to the a2 port of the processing unit 48, and the GND terminal is connected to the GND1 bus terminal 63. For converting the flow rate by the angle of rotation of the rotating shaft of the second rotation angle sensor 14.

The zero switch 54 has a positive terminal connected to the OUT + terminal of the second buck module 50 and a negative terminal connected to the first bank of busbars 58. Since the mounting position cannot be guaranteed to be the same every time, the zero switch 54 can zero the measured data at an arbitrary position.

The positive pole of the electromagnetic relay interrupt switch 53 is connected with the OUT + end of the second voltage reduction module 50, and the negative pole is connected with the fourth row of bus 62. For controlling the on-off of the electromagnetic relay 49 and thus the on-off of the first and second

rotation angle sensors

7 and 14.

The first bus 58 outputs two paths, one path is connected to the port 3 of the processing unit 48, and the other path is connected to the first resistor 59. The fourth row of bus 62 outputs two paths, one path is connected to port No. 2 of the processing unit 48, and the other path is connected to the second resistor 61. The second row of bus bars 57 output is connected to GND2 row of bus bars 56. The output of the third row of bus bars 60 is connected to GND2 row of bus bars 56. GND2 bus 56 is connected to the GND port of processing unit 48.

The overall working process of the floating ball-torsion spring type liquid level and flow rate online detection device of the embodiment is briefly described as follows:

in the liquid level measuring process, a power switch 44 is pressed to supply power to the whole control device, the initial position of a floating ball 12 is manually pulled to be arranged at the bottommost part, the initial included angle theta between a swing rod 10 and the vertical direction is measured, then a zero setting switch 54 is pressed to set the current numerical value of a first angle sensor 7 to be 0, when the liquid level rises, the floating ball 12 in water moves upwards along with the liquid level, a floating ball connecting piece 9 and a second mounting seat 13 connected with the floating ball 12 move upwards to drive the swing rod 10 and the swing rod connecting piece 8 to rotate relatively by taking a first pin 16 as an axis, so that a rotating shaft of the first angle sensor 7 rotates by a certain angle, an analog signal of the first angle sensor 7 is input into a processing unit 48 to read an angle β in real time, the rotated angle and the depth of the liquid level are measured in real time through the relation H ═ Lcos theta-Lcos (theta + β) + H, as shown in figure 2, the liquid level height H, the length of the swing rod, the theta initial angle, the β is converted into the height of the liquid level output in the processing unit 48, a remote serial port ID monitoring module is created through a remote serial port, and a remote serial port ID monitoring module is created through a remote serial port.

And (3) flow velocity measurement process: the power switch 44 is depressed to supply power to the entire control system. The initial position of the float ball is set to the lowest portion, and then the zero switch 54 is pressed to set the value of the second rotation angle sensor 14 to 0 in the case where there is no flow rate. When there is a flow velocity, the floating ball 12 is pushed, and the floating ball connecting member 9 connected to the floating ball 12 rotates relative to the second pin 18, so that the second rotation angle sensor 14 rotates through a certain angle. The analog signal of the rotation angle sensor 14 is input to the processing unit 48 to read the angle γ in real time, and the thrust F on the float can be obtained according to the formula F × L1 where the moment generated by the thrust on the float is balanced with the moment generated by the torsion spring. F: thrust received by the float, L1: distance from the float ball to the second pin, r: angle that the floater was rotated, K: the spring constant of the torsion spring. The relationship between force and flow rate, F, is 0.5 Cpv²A (C: non-dimensional drag coefficient, v: flow velocity, A: incident flow area of object, ρ: fluid density) is converted in the processing unit 48 into an output flow velocitySize. Data are uploaded to the cloud through the unique ID address of the 4G module, the 4G module is in a virtual serial port creating mode, and the remote PC end detects the flow rate in real time in an online mode by reading the virtual serial port.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. The utility model provides a floater-torsional spring formula liquid level velocity of flow on-line measuring device which characterized in that, the device includes:

a control circuit comprising a processing unit and a communication unit;

2. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 1, wherein the first and second rotation angle sensors comprise an encoder and a rotating shaft, and the encoder outputs an electric signal to mark a rotation angle when the rotating shaft rotates.

3. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 2, further comprising:

4. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 3, further comprising a swing rod connecting piece, wherein one end of the swing rod connecting piece is connected to the swing rod, and the other end of the swing rod connecting piece is connected to the first connecting pipe;

5. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 2, further comprising:

6. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 5, further comprising a first torsion spring and a second torsion spring, which are respectively disposed at two ends of the second connection pipe, so that the second connection pipe generates a moment when rotating around the second pin.

7. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 6, further comprising a floating ball connecting piece, wherein one end of the floating ball connecting piece is connected to the floating ball, and the other end of the floating ball connecting piece is connected to the second connecting pipe;

8. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 1, wherein the control circuit further comprises a zero switch in communication connection with the processing unit.

9. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 1, wherein the control circuit further comprises a power supply for supplying power to a circuit module in the control circuit.

10. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 9, wherein the control circuit further comprises an electromagnetic relay and an electromagnetic relay interrupt switch;