Open channel flowmeter online calibration device

Abstract

The present invention discloses an online calibration device for an open channel flowmeter, which relates to the technical field of flow metering equipment. The main purpose is to provide an online calibration device for an open channel flowmeter that can perform online calibration on an open channel flowmeter. The main technical solution of the present invention is: an online calibration device for an open channel flowmeter, comprising: a measuring component, wherein the bottom of the measuring cylinder has a water inlet hole, the cylinder has a first cavity, a fixing rod is arranged in the first cavity, a float is slidingly arranged on the fixing rod, a display component is arranged on the top of the cylinder, and a mounting component is arranged on the outer side of the cylinder; a supporting component, wherein the transducer is evenly arranged longitudinally on one side of the fixing plate, one end of the guide component is connected to the fixing plate, the guide component has a first threaded hole, and the connecting component is sequentially connected to the mounting component and the first threaded hole; a control component, wherein the control component is respectively connected to the display component, the mounting component and the transducer. The present invention is mainly used for flow metering.

Description

Technical Field

[0001] The present invention relates to the technical field of flow metering equipment, and in particular to an online calibration device for an open channel flow meter. Background Art

[0002] An open channel flowmeter is a device used to measure channel flow. It is widely used to measure water flow in open channels for inter-basin water transfer, agricultural irrigation, and wastewater treatment. Open channel flowmeters can be categorized by their measurement principle, including velocity, electromagnetic, and ultrasonic types. These meters are installed at a specific section of the channel to measure the instantaneous flow rate.

[0003] Traditionally, open channel water transfer has relied on an empirical relationship between water level and flow rate, inferring instantaneous flow rate by measuring water levels. This method is empirical, with an error typically ranging from 10% to 20%. With the increasing scarcity of freshwater resources and increasingly standardized national management, water conservancy, agriculture, and other departments are placing increasingly high demands on the accuracy of open channel water transfer metering. Consequently, various types of open channel flowmeters have emerged, and their application is becoming increasingly widespread in areas such as flow measurement in agricultural irrigation canals and sewage discharge channels. Existing open channel flowmeters generally have an accuracy of 2% to 5%, which meets the precision requirements of these areas. However, achieving online calibration of these open channel flowmeters is a major challenge in current flow measurement technology. Summary of the Invention

[0004] In view of this, an embodiment of the present invention provides an open channel flowmeter online calibration device, the main purpose of which is to provide an open channel flowmeter online calibration device capable of performing online calibration on the open channel flowmeter.

[0005] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0006] An embodiment of the present invention provides an open channel flowmeter online calibration device, the device comprising:

[0007] A measuring component, comprising a cylinder, a fixing rod, a float, a display component, and a mounting component. The bottom of the cylinder has a water inlet hole, the cylinder has a first cavity, the fixing rod is disposed in the first cavity, the float is slidably disposed on the fixing rod, the display component is disposed on the top of the cylinder, and the mounting component is disposed on the outer side of the cylinder;

[0008] A supporting component, the supporting component including a fixing component and a connecting component, the fixing component including a fixing plate, a transducer, and a guide component, the transducer being evenly arranged longitudinally on one side of the fixing plate, one end of the guide component being connected to the fixing plate, the guide component having a first threaded hole, and the connecting component being sequentially connected to the mounting component and the first threaded hole;

[0009] A control component is connected to the display component, the mounting component and the transducer respectively.

[0010] Furthermore, the fixing component includes a first fixing component, a second fixing component, a third fixing component and a fourth fixing component, the connecting component includes a first connecting component and a second connecting component, and the mounting component includes a first mounting component and a second mounting component, the middle part of the first connecting component is connected to the first mounting component, the two ends of the first connecting component are respectively threadedly connected to the first fixing component and the second fixing component, the middle part of the second connecting component is connected to the second mounting component, the two ends of the second connecting component are respectively threadedly connected to the third fixing component and the fourth fixing component, and the first connecting component is perpendicular to the second connecting component.

[0011] Furthermore, each of the mounting components includes a drive motor and a clamping ring, the drive motor and the clamping ring are mounted on the cylinder, the clamping ring is clamped to one of the connecting components, and the output end of the drive motor is rotatably connected to the connecting component.

[0012] Furthermore, each of the connecting components includes a rod body, a clamping component and a gear component, the clamping component is arranged in the middle of the rod body, the clamping component has a first clamping groove, the clamping ring is clamped in the first clamping groove, the gear component is arranged on one side of the clamping component, the gear component is engaged with the output end of the drive motor, and the rod body has a first external thread and a second external thread, and the directions of the first external thread and the second external thread are opposite.

[0013] Furthermore, each of the connecting components further includes a first blocking piece and a second blocking piece, wherein the first blocking piece is arranged between the first external thread and the gear component, and the second blocking piece is arranged between the second external thread and the clamping member.

[0014] Furthermore, the axis of the clamping ring of the first mounting component is perpendicular to the axis of the clamping ring of the second mounting component, and the first connecting component is perpendicular to the second connecting component.

[0015] Furthermore, each of the fixed plates includes a plate body, a guide plate and a flexible layer. The guide plates are arranged on both sides of the plate body, and the flexible layer is attached to the plate body and the guide plate.

[0016] Furthermore, a horizontal component is provided on the top of the cylinder.

[0017] Furthermore, the bottom surface of the fixing component and the bottom surface of the cylinder are located at the same horizontal plane.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] In the technical solution provided by the embodiments of the present invention, the measuring component functions to measure the liquid level in real time. The measuring component includes a cylinder, a fixing rod, a float, a display component, and a mounting component. The cylinder has a water inlet at the bottom, a first cavity, a fixing rod disposed in the first cavity, a float slidably mounted on the fixing rod, a display component disposed at the top of the cylinder, and a mounting component disposed on the outer side of the cylinder. The supporting component functions to secure the measuring component and includes a fixing component and a connecting component. The fixing component includes a fixing plate, a transducer, and a guide component. The transducers are evenly arranged longitudinally on one side of the fixing plate. One end of the guide component is connected to the fixing plate. The guide component has a first threaded hole, and the connecting component is sequentially connected to the mounting component and the first threaded hole. The control component functions to collect data and perform calculations. The control component is respectively connected to the display component, the mounting component, and the transducer. Compared to the prior art, the instantaneous flow rate is estimated by measuring the water level based on the empirical relationship between water level and flow rate. This method is an empirical measurement method with an error of typically 10% to 20%. With the increasing scarcity of freshwater resources and the increasingly standardized national management, water conservancy, agriculture and other departments have increasingly higher requirements for the accuracy of open channel water transfer measurement. As a result, different types of open channel flow meters have emerged and have been applied in the fields of agricultural irrigation branch canal flow measurement, sewage discharge channel flow measurement, etc., and are showing an increasingly widespread trend. The measurement accuracy of existing open channel flow meters is generally 2% to 5%, which can meet the measurement accuracy requirements of the above-mentioned fields. However, how to achieve online calibration of these open channel flow meters is a major problem in current flow measurement technology. In this technical solution, the measuring component is fixed according to the fixing component and the connecting component so that the measuring component is located in the center of the open channel. Then, the sound channel length of the transducer is calculated according to the position of the fixing component and the connecting component in the open channel. Then, the control component calculates the average flow velocity of the open channel cross section according to the data collected by the transducer in real time, and then calculates the channel cross-sectional area. The standard instantaneous flow rate is calculated based on the average flow velocity and the channel cross-sectional area. This method can accurately measure the sound channel length and avoid errors caused by manual measurement. At the same time, placing the fixing rod and the float in the cylinder can avoid the impact of water flow impact on the metal float, thereby improving the accuracy of the channel water level depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic top view of an online calibration device for an open channel flowmeter according to an embodiment of the present invention;

[0021] Figure 2 A left-side structural schematic diagram of an open channel flowmeter online calibration device provided by an embodiment of the present invention;

[0022] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 A schematic structural diagram of a measuring component provided by an embodiment of the present invention;

[0024] Figure 5 A schematic structural diagram of a connecting component provided by an embodiment of the present invention;

[0025] Figure 6 A structural schematic diagram of a fixing component provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 6 As shown, an embodiment of the present invention provides an open channel flowmeter online calibration device, the device comprising:

[0028] The measuring component 1 includes a cylinder 11, a fixing rod 12, a float 13, a display component 14, and a mounting component. The bottom of the cylinder 11 has a water inlet 111, the cylinder 11 has a first cavity, the fixing rod 12 is disposed in the first cavity, the float 13 is slidably disposed on the fixing rod 12, the display component 14 is disposed on the top of the cylinder 11, and the mounting component is disposed on the outer side of the cylinder 11;

[0029] The supporting component includes a fixing component and a connecting component. The fixing component includes a fixing plate 215, a transducer 216, and a guide component 217. The transducer 216 is evenly arranged longitudinally on one side of the fixing plate 215. One end of the guide component 217 is connected to the fixing plate 215. The guide component 217 has a first threaded hole 2171. The connecting component is sequentially connected to the mounting component and the first threaded hole 2171.

[0030] The control component is connected to the display component 14, the mounting component and the transducer 216 respectively.

[0031] In the technical solution provided by the embodiment of the present invention, the function of the measuring component 1 is to measure the liquid level in real time. The measuring component 1 includes a cylinder 11, a fixed rod 12, a float 13, a display component 14 and a mounting component. The bottom of the cylinder 11 has a water inlet 111, the cylinder 11 has a first cavity, the fixed rod 12 is arranged in the first cavity, the float 13 is slidably arranged on the fixed rod 12, the display component 14 is arranged on the top of the cylinder 11, and the mounting component is arranged on the outer side of the cylinder 11; the function of the supporting component is to fix the measuring component 1, and the supporting component includes a fixing component and a connecting component. The fixing component includes The fixed plate 215, transducer 216, and guide member 217 are arranged evenly longitudinally on one side of the fixed plate 215. One end of the guide member 217 is connected to the fixed plate 215. The guide member 217 has a first threaded hole 2171. The connecting member is sequentially connected to the mounting member and the first threaded hole 2171. The control member is responsible for collecting data information and performing calculations. The control member is respectively connected to the display member 14, the mounting member, and the transducer 216. Compared with the prior art, the instantaneous flow rate is calculated by measuring the water level based on the empirical relationship between water level and flow rate. This method is an empirical measurement method with an error of typically 10% to 20%. With the increasing scarcity of freshwater resources and the increasingly standardized national management, water conservancy, agriculture and other departments have increasingly higher requirements for the accuracy of open channel water delivery measurement. As a result, different types of open channel flow meters have emerged and have been applied in fields such as agricultural irrigation branch canal flow measurement and sewage discharge channel flow measurement, and are showing an increasingly widespread trend. The measurement accuracy of existing open channel flow meters is generally 2% to 5%, which can meet the measurement accuracy requirements of the above-mentioned fields. However, how to achieve online calibration of these open channel flow meters is a major problem in current flow measurement technology. In this technical solution, the measuring component 1 is fixed according to the fixing component and the connecting component so that the measuring component 1 is located in the center of the open channel. Then, the sound channel length of the transducer 216 is calculated according to the position of the fixing component and the connecting component in the open channel. Then, the control component calculates the average flow velocity of the open channel cross section according to the data collected in real time by the transducer 216, and then calculates the cross-sectional area of the channel 9. The standard instantaneous flow rate is calculated based on the average flow velocity and the cross-sectional area of the channel 9. This method can accurately measure the sound channel length and avoid errors caused by manual measurement. At the same time, placing the fixing rod 12 and the float 13 in the cylinder 11 can avoid the impact of water flow impact on the metal float, thereby improving the accuracy of the water level depth of the channel 9.

[0032] The function of the above-mentioned measuring component 1 is to measure the liquid level in real time. The measuring component 1 includes a cylinder 11, a fixed rod 12, a float 13, a display component 14 and a mounting component. The bottom of the cylinder 11 has a water inlet 111, the cylinder 11 has a first cavity, the fixed rod 12 is arranged in the first cavity, the float 13 is slidably arranged on the fixed rod 12, the display component 14 is arranged on the top of the cylinder 11, and the mounting component is arranged on the outer side of the cylinder 11. The cylinder 11 is made of stainless steel, and the bottom of the cylinder 11 has a water inlet 111. Water can enter the cylinder 11 through the water inlet 111. The upper part of the cylinder 11 is a sealing structure. The fixed rod 12 adopts a magnetostrictive rod. The float 13 is a metal float 13, which is arranged on the fixed rod 12, and the float 13 can Sliding on the magnetostrictive rod, when water enters the cylinder 11 from the water inlet 111, the water can make the float 13 float so that the water level can be measured in real time. In addition, the cylinder 11 can prevent the water flow fluctuation in the channel 9 from affecting the metal float 13, thereby improving the stability and accuracy of real-time water level detection. The display component 14 is arranged at the top of the cylinder 11, and the display component 14 is connected to the top of the magnetostrictive rod, which can display the position of the float 13 and the water level in real time. The mounting component is arranged on the outside of the cylinder 11 and can be connected to the connecting component. Optionally, a horizontal component 16 is added. The horizontal component 16 is arranged at the top of the cylinder 11 and can display in real time whether the cylinder 11 is in a horizontal state. The function of the supporting component is to fix the measuring The measuring component 1, the supporting component includes a fixing component and a connecting component, the fixing component includes a fixing plate 215, a transducer 216 and a guide component 217, the transducer 216 is evenly arranged on one side of the fixing plate 215 in the longitudinal direction, one end of the guide component 217 is connected to the fixing plate 215, the guide component 217 has a first threaded hole 2171, the connecting component is sequentially connected to the mounting component and the first threaded hole 2171, a plurality of transducers 216 are mounted on the side of the fixing plate 215, a plurality of transducers 216 are arranged longitudinally, the guide component 217 is mounted on the upper part of the fixing plate 215, and the guide component 217 has a first threaded hole 2171, the connecting component is sequentially connected to the mounting component and the first threaded hole 2171, specifically, the fixing component includes a first threaded hole 2171. The fixing part 211, the second fixing part 212, the third fixing part 213 and the fourth fixing part 214, the connecting part includes a first connecting part 221 and a second connecting part 222, the mounting part includes a first mounting part 151 and a second mounting part 152, the middle of the first connecting part 221 is connected to the first mounting part 151, the two ends of the first connecting part 221 are respectively threadedly connected to the first fixing part 211 and the second fixing part 212, the middle of the second connecting part 222 is connected to the second mounting part 152, the two ends of the second connecting part 222 are respectively threadedly connected to the third fixing part 213 and the fourth fixing part 214, and the first connecting part 221 is perpendicular to the second connecting part 222, that is,The first connecting component 221 is located between the first fixing component 211 and the second fixing component 212. Each installation component includes a drive motor 153 and a clamping ring 154. The drive motor 153 and the clamping ring 154 are installed on the cylinder 11. The clamping ring 154 is clamped to one of the connecting components. The output end of the drive motor 153 is rotatably connected to the connecting component. The drive motor 153 can drive the connecting component to rotate around its axis, so that the first fixing component 211 and the second fixing component 212 move toward or away from the inner wall of the channel 9 until the first fixing component 211, the second fixing component 212, the third fixing component 213 and the fourth fixing component 214 are all against the inner wall of the channel 9. The function of the control component is to collect data information and perform calculations. The control components are respectively connected Connected to the display component 14, the mounting component, and the transducer 216, in this technical solution, the measuring component 1 is fixed using the fixing component and the connecting component, so that the measuring component 1 is located at the center of the open channel. The acoustic channel length of the transducer 216 is then calculated based on the position of the fixing component and the connecting component in the open channel. The control component then calculates the average flow velocity of the open channel cross section based on the data collected in real time by the transducer 216, and then calculates the cross-sectional area of the channel 9. The standard instantaneous flow rate is calculated based on the average flow velocity and the cross-sectional area of the channel 9. This method can accurately measure the acoustic channel length and avoid errors caused by manual measurement. At the same time, placing the fixing rod 12 and the float 13 within the cylinder 11 can prevent the impact of water flow on the metal float, thereby improving the accuracy of the water level depth in the channel 9.

[0033] The specific operation mode of this device is as follows:

[0034] Select a rectangular channel 9 with a length that meets the measurement requirements. The bottom of the channel 9 needs to be clean and flat. Then install the fixing components on the connecting components so that the sound channel length between the transducers 216 on the first fixing component 211 and the second fixing component 212 is the shortest. At this time, the distance between the first fixing component 211 and the second fixing component 212 is L0.

[0035] Place the device in the channel 9 to be measured, place the cylinder 11 at the center of the width of the channel 9 to be measured, and keep the upper surface of the cylinder 11 horizontal. The bottom of the cylinder 11 is in contact with the bottom of the channel 9, the bottom of the fixing component is in contact with the bottom of the channel 9, and the bottom surface of the fixing component and the bottom surface of the cylinder 11 are in the same horizontal plane. Then, set the open channel flowmeter 8 to be measured at the back of the device, and connect the control component to the open channel flowmeter 8 to be measured.

[0036] Start the installation component to rotate the first connecting component 221 around its axis, moving the first fixing component 211 and the second fixing component 212 toward the inner wall of the channel 9 until the first fixing component 211 and the second fixing component 212 abut the inner wall of the channel 9. Record the movement distance of the first fixing component 211 and the second fixing component 212 as L1. At this time, the acoustic channel length L between the transducers 216 on the first fixing component 211 and the second fixing component 212 is L = L0 + 2L1.

[0037] The acoustic channel length L of the transducer 216 is input into the control system, and data from the transducer 216 is collected in real time. The data information includes parameters such as signal, time, and flow velocity. The average flow velocity V of the cross section of the channel 9 is calculated based on the mathematical model using the data from the transducer 216 below the water surface.

[0038] The control system collects the water level H measured by the fixed rod 12 and the float 13 in real time, and then adjusts the water level according to the length L of the sound channel and the angle 45°.

[0039] The width of channel 9 is calculated as: D = L / cos45°,

[0040] The cross-sectional area of channel 9 is thus obtained as: A = H·D = H·L / cos45°;

[0041] The instantaneous flow rate q of channel 9 can be calculated based on the average flow velocity V and cross-sectional area A of channel 9 measured by the device. s =V·A, that is, the standard instantaneous flow rate q is obtained based on the velocity-area method s ;

[0042] The control system automatically collects and records the standard instantaneous flow rate q s , the instantaneous flow rate q displayed by the open channel flowmeter 8 is i , and perform calculations such as error and repeatability, and output the original records, thereby achieving online calibration of the open channel flowmeter 8 being measured.

[0043] Furthermore, each connecting component includes a rod body 223, a clamping component 224 and a gear component 225. The clamping component 224 is arranged in the middle of the rod body 223, the clamping component 224 has a first clamping groove 2241, the clamping ring 154 is clamped in the first clamping groove 2241, the gear component 225 is arranged on one side of the clamping component 224, the gear component 225 is engaged with the output end of the drive motor 153, and the rod body 223 has a first external thread 2231 and a second external thread 2232, and the directions of the first external thread 2231 and the second external thread 2232 are opposite. In this embodiment, the connecting component is further defined. The rod body 223 is made of metal material. A clamping member 224 is provided in the middle of the rod body 223. The clamping member 224 and the rod body 223 are an integrally formed structure. The clamping member 224 has a first clamping groove 2241. The clamping ring 154 is clamped in the first clamping groove 2241. In addition, a gear member 225 is provided on the rod body 223. The gear member 225 is located on one side of the clamping member 224. The gear member 225 and the output end of the drive motor 153 are meshed with each other, so that the drive motor 153 3 can drive the gear component 225 to rotate, so that the rod body 223 can rotate around its axis. The rod body 223 has a first external thread 2231 and a second external thread 2232. The first external thread 2231 and the second external thread 2232 are in opposite directions. When the rod body 223 of the first connecting component 221 rotates clockwise, the first fixing component 211 and the second fixing component 212 move toward the inner wall of the channel 9. When the rod body 223 of the first connecting component 221 rotates counterclockwise, the first fixing component 211 and the second fixing component 212 move toward the inner wall of the channel 9. The two fixing parts 212 move away from the center of the channel 9, thereby achieving the technical effect of facilitating the movement of the fixing parts; specifically, each connecting part further includes a first blocking piece 226 and a second blocking piece 227, the first blocking piece 226 being arranged between the first external thread 2231 and the gear part 225, and the second blocking piece 227 being arranged between the second external thread 2232 and the clamping part 224, the first blocking piece 226 and the second blocking piece 227 being fixed on the rod body 223, that is, the first blocking piece 226, the second blocking piece 227 and the rod body 223 are an integrally formed structure, the function of the first blocking piece 226 and the second blocking piece 227 is to limit the position of the fixing part to prevent the fixing part from colliding with the clamping part 224 or the gear part 225, and the distance between the clamping part 224 and the first blocking piece 226 is the same as the distance between the clamping part 224 and the second blocking piece 227, so that the clamping part 224 can be located at the midpoint between the first fixing part 211 and the second fixing part 212, thereby achieving the technical effect of limiting.

[0044] Furthermore, the axis of the snap ring 154 of the first mounting component 151 is perpendicular to the axis of the snap ring 154 of the second mounting component 152, and the first connecting component 221 is perpendicular to the second connecting component 222. In this embodiment, the mounting components are further defined, and the axis of the snap ring 154 of the first mounting component 151 is perpendicular to the axis of the snap ring 154 of the second mounting component 152, that is, the angle between the snap ring 154 of the first mounting component 151 and the snap ring 154 of the second mounting component 152 is 90 degrees, and the axis of the snap ring 154 of the first mounting component 151 and the axis of the snap ring 154 of the second mounting component 152 are both perpendicular to the axis of the cylinder 11. At this time, the first connecting component 221 and the second connecting component 222 are installed so that the first connecting component 221 is perpendicular to the second connecting component 222. The two connecting parts 222, that is, the axis of the snap ring 154 of the first installation part 151 coincides with the axis of the first connecting part 221, and the axis of the snap ring 154 of the second installation part 152 coincides with the axis of the second connecting part 222, and the first connecting part 221 and the second connecting part 222 are staggered with each other. At the same time, the first connecting part 221 and the second connecting part 222 are perpendicular to each other to form a cross, which can not only fix and limit the position of the cylinder 11, but also accurately limit the position between the fixed parts, thereby achieving the technical effect of limiting.

[0045] Furthermore, each fixed plate 215 includes a plate body 2151 , a guide plate 2152 and a flexible layer 2153 . The guide plates 2152 are arranged on both sides of the plate body 2151 , and the flexible layer 2153 is attached to the plate body 2151 and the guide plate 2152 . In this embodiment, a fixed plate 215 is further defined, the upper part of the plate body 2151 is fixedly connected to the guide component 217, the interior of the plate body 2151 is a sealed and waterproof structure, multiple transducers 216 are fixed on the plate body 2151, and a signal antenna is provided on the upper part of the plate body 2151, and the signal antenna is connected to each transducer 216. The guide plate 2152 is provided on both sides of the plate body 2151, which can reduce the resistance of the plate body 2151 in the water flow. The flexible layer 2153 is adhered to the plate body 2151 and the guide plate 2152. The flexible layer 2153 adopts a rubber layer, which can increase the friction between the plate body 2151 and the inner wall of the channel 9, thereby achieving the function of fixing the plate 215 body.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An online calibration device for an open channel flowmeter, characterized in that: include: A measuring component, comprising a cylinder, a fixing rod, a float, a display component, and a mounting component. The bottom of the cylinder has a water inlet hole, the cylinder has a first cavity, the fixing rod is disposed in the first cavity, the float is slidably disposed on the fixing rod, the display component is disposed on the top of the cylinder, and the mounting component is disposed on the outer side of the cylinder; 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole comprises a first end, and a second end, of the foot stand. The bosses comprise a through-hole, a second end, and a second end. The bosses comprise a through-hole, a second end, and a second end. A control component is connected to the display component, the mounting component and the transducer respectively.

2. The open channel flowmeter online calibration device according to claim 1, characterized in that: The fixing component includes a first fixing component, a second fixing component, a third fixing component and a fourth fixing component, the connecting component includes a first connecting component and a second connecting component, and the mounting component includes a first mounting component and a second mounting component. The middle part of the first connecting component is connected to the first mounting component, and the two ends of the first connecting component are respectively threadedly connected to the first fixing component and the second fixing component. The middle part of the second connecting component is connected to the second mounting component, and the two ends of the second connecting component are respectively threadedly connected to the third fixing component and the fourth fixing component, and the first connecting component is perpendicular to the second connecting component.

3. The open channel flowmeter online calibration device according to claim 2, characterized in that: Each of the connecting components further includes a first blocking piece and a second blocking piece, wherein the first blocking piece is arranged between the first external thread and the gear component, and the second blocking piece is arranged between the second external thread and the clamping member.

4. The open channel flowmeter online calibration device according to claim 2, characterized in that: An axis of the snap ring of the first mounting component is perpendicular to an axis of the snap ring of the second mounting component, and the first connecting component is perpendicular to the second connecting component.

5. The open channel flowmeter online calibration device according to any one of claims 1 to 4, characterized in that: Each of the fixed plates includes a plate body, a guide plate and a flexible layer. The guide plates are arranged on both sides of the plate body, and the flexible layer is attached to the plate body and the guide plate.

6. The open channel flowmeter online calibration device according to any one of claims 1 to 4, characterized in that: Also includes: A horizontal component is provided on the top of the cylinder.

7. The open channel flowmeter online calibration device according to any one of claims 1 to 4, characterized in that: The bottom surface of the fixing component and the bottom surface of the cylinder are located at the same horizontal plane.

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