Flow measuring and checking device for fluid conveying pipeline system

Abstract

The utility model relates to the technical field of flow measuring devices, and provides a flow measuring and checking device for a fluid conveying pipeline system, which comprises a controller, a standard constant volume cavity and a water inlet header pipe, the top of the standard constant-volume cavity is communicated with a measuring water inlet pipe and a measuring water outlet pipe, the ends, close to the standard constant-volume cavity, of the measuring water inlet pipe and the measuring water outlet pipe are provided with a water inlet flow indicating switch and a water outlet flow indicating switch respectively, and the bottom of the standard constant-volume cavity is communicated with an emptying calibration pipe; the emptying calibration tube is connected with an emptying calibration valve; the water inlet header pipe is connected with a conveying pipeline, and one end, far away from the standard constant volume cavity, of the measuring water inlet pipe is connected with the water inlet header pipe through a switching valve; and the inlet water flow indication switch, the outlet water flow indication switch, the emptying calibration valve and the switching valve are all electrically connected with the controller. The device has the effects of independently measuring the flow of the conveying pipeline and checking the flow meter on the conveying pipeline.

Description

Technical Field

[0001] This application relates to the technical field of flow measurement devices, and in particular to a flow measurement and verification device for fluid transport pipeline systems. Background Technology

[0002] In the wastewater treatment industry, the accuracy of flow measurement in various transmission pipelines directly affects process control and environmental compliance. Therefore, flow meters are typically installed in these pipelines to measure the internal flow rate in real time during normal operation.

[0003] Currently, electromagnetic flow meters are mostly used for flow measurement in pipelines. However, the sewage in pipelines usually contains a lot of impurities, and the various detection components of electromagnetic flow meters are prone to scaling, which leads to errors in the actual detection data of electromagnetic flow meters. At present, electromagnetic flow meters usually need to be disassembled before testing and calibration, which is difficult to operate and requires stopping the operation of the pipeline. Therefore, there is room for improvement. Utility Model Content

[0004] To facilitate the measurement of flow rate in a delivery pipeline and the calibration of the flow meter installed in the pipeline, this application provides a flow rate measurement and calibration device for a fluid delivery pipeline system.

[0005] This application provides a flow measurement and verification device for fluid transport pipeline systems, which adopts the following technical solution:

[0006] A flow measurement and calibration device for a fluid transport pipeline system includes a controller, a standard constant-volume chamber, and a main inlet pipe. The top of the standard constant-volume chamber is connected to a measuring inlet pipe and a measuring outlet pipe. An inlet flow indicator switch and an outlet flow indicator switch are respectively installed at the ends of the measuring inlet pipe and the measuring outlet pipe closest to the standard constant-volume chamber. The bottom of the standard constant-volume chamber is connected to a venting calibration pipe, which is connected to a venting calibration valve. The main inlet pipe is connected to a transport pipeline. The end of the measuring inlet pipe furthest from the standard constant-volume chamber is connected to the main inlet pipe via a switching valve. The inlet flow indicator switch, the outlet flow indicator switch, the venting calibration valve, and the switching valve are all electrically connected to the controller.

[0007] By adopting the above technical solution, when measuring the actual flow rate of the conveying pipeline, the controller controls the switching valve to connect the main inlet pipe to the measuring inlet pipe. When the fluid flows through the inlet flow indicator switch of the measuring inlet pipe, the controller receives the timing start signal and starts timing. When the fluid fills the standard constant volume chamber and flows through the outlet flow indicator switch of the measuring outlet pipe, the controller receives the timing stop signal and stops timing, thereby obtaining the filling time of the fluid in the standard constant volume chamber. Then, based on the volume value of the standard constant volume chamber and the filling time, the actual flow rate of the conveying pipeline is calculated. At the same time, the measured conveying flow rate value can be compared with the flow rate value measured by the flow meter at the downstream end of the conveying pipeline to verify the other flow meters on the conveying pipeline. In addition, compared with traditional flow meters, it has the characteristics of low measurement cost, wide applicability, and long service life. After the measurement is completed, the controller controls the venting calibration valve to open the venting calibration pipe to discharge the fluid in the standard constant volume chamber through the venting calibration valve.

[0008] Preferably, the switching valve is also connected to a siphon breaking pipe.

[0009] By adopting the above technical solution, the controller controls the venting calibration valve to open the venting calibration tube, while simultaneously controlling the switching valve to connect the siphon breaking tube with the measuring water inlet tube, so as to remove the remaining fluid in the measuring water inlet tube through the siphon breaking tube and reduce the interference of the residual fluid in the measuring water inlet tube with the subsequent flow measurement.

[0010] Preferably, a vacuum breaker valve is also installed at the top of the measuring water inlet pipe.

[0011] By adopting the above technical solution, while removing the remaining fluid in the measuring inlet pipe through the siphon tube, the vacuum breaking valve at the top of the measuring inlet pipe can be used to break the vacuum state in the measuring inlet pipe, so that the fluid in the measuring inlet pipe can be further discharged.

[0012] Preferably, the end of the siphon tube furthest from the switching valve is connected to the venting calibration tube.

[0013] By adopting the above technical solution, the fluid discharged from the inlet pipe via the siphon can be drawn into the venting calibration pipe and then discharged through the venting calibration pipe, eliminating the need to set up a discharge pipeline and reducing pipeline complexity.

[0014] Preferably, the venting calibration tube is equipped with a venting flow indicator switch, which is electrically connected to the controller.

[0015] By adopting the above technical solution, when the controller controls the venting calibration valve to open the venting calibration pipe, the venting timer is started. When the venting water flow indicator switch detects no water flow signal and continues for a corresponding time, the controller stops the venting timer to obtain the venting time of the standard constant volume chamber and compare it with the venting time of the standard constant volume chamber in the initial state, so as to determine whether there is scale inside the standard constant volume chamber.

[0016] Preferably, the standard constant volume cavity includes a tank body and a tank cover, with the tank cover fitted onto the top opening end of the tank body.

[0017] By adopting the above technical solution, it is convenient to open the tank lid regularly to clean scale and other debris inside the tank.

[0018] Preferably, a flow guide groove is installed in the standard constant volume cavity. The flow guide groove is spiral-shaped, with the top end of the flow guide groove located below the connection between the measuring water inlet pipe and the standard constant volume cavity, and the bottom end of the flow guide groove extending to the bottom of the standard constant volume cavity.

[0019] By adopting the above technical solution, the spiral guide channel is used to buffer the fluid entering the standard constant volume cavity, thereby reducing the generation of air bubbles in the standard constant volume cavity and reducing the interference of air bubbles on the water flow indicator switch.

[0020] Preferably, both the can body and the can lid are made of transparent plastic.

[0021] By adopting the above technical solution, the internal water flow and dirt accumulation can be observed through the standard constant volume chamber, which facilitates the subsequent maintenance of the standard constant volume chamber.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. When obtaining the flow rate of the delivery pipeline through the flow measurement and calibration device, the connection between the measuring inlet pipe and the main inlet pipe is switched by the switching valve. The inlet water flow indicator switch on the measuring inlet pipe and the outlet water flow indicator switch on the measuring outlet pipe are used to obtain the time it takes for the fluid to fill the standard constant volume cavity. Combined with the volume of the standard constant volume cavity, the actual flow rate of the delivery pipeline is obtained. This facilitates the measurement of the flow rate of the delivery pipeline. At the same time, the measured actual flow rate can be compared with the flow rate measured by other flow meters at the downstream end of the delivery pipeline to calibrate the flow meters.

[0024] 2. By installing a siphon-breaking pipe at the switching valve, after the flow measurement and calibration device finishes measuring, the switching valve switches the siphon-breaking pipe to connect with the measuring inlet pipe. The residual water in the measuring inlet pipe can be discharged through the siphon-breaking pipe, thus limiting the possibility of residual water interfering with the next measurement of the flow measurement and calibration device.

[0025] 3. By installing a venting flow indicator switch on the venting calibration tube, when the standard constant volume cavity releases internal fluid through the venting calibration tube, the venting time of the standard constant volume cavity can be obtained through the venting flow indicator switch. This allows for comparison of the venting time with the initial venting time of the standard constant volume cavity, making it easier to determine whether there is scale buildup inside the standard constant volume cavity. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram illustrating the flow measurement and calibration device in the embodiments of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Standard constant volume chamber; 10. Flow guide channel; 11. Tank body; 12. Tank cover; 13. Measuring water inlet pipe; 131. Water inlet flow indicator switch; 132. Vacuum breaker valve; 14. Measuring water outlet pipe; 141. Water outlet flow indicator switch; 15. Venting calibration pipe; 151. Venting calibration valve; 152. Venting water flow indicator switch; 2. Main water inlet pipe; 3. Switching valve; 4. Siphon breaking pipe; 5. Water inlet branch pipe. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0030] This application discloses a flow measurement and verification device for a fluid transport pipeline system, referring to... Figure 1 The system includes a controller, a standard volumetric cavity 1, and a main inlet pipe 2. The controller is a conventional controller in the prior art. The standard volumetric cavity 1 is supported above the delivery pipeline by a bracket. The top of the standard volumetric cavity 1 is connected to a measuring inlet pipe 13 and a measuring outlet pipe 14. A water inlet flow indicator switch 131 and a water outlet flow indicator switch 141 are respectively installed at the ends of the measuring inlet pipe 13 and the measuring outlet pipe 14 near the standard volumetric cavity 1. The bottom of the standard volumetric cavity 1 is connected to a venting calibration pipe 15, and a venting calibration valve 151 is installed on the venting calibration pipe 15. The main inlet pipe 2 is connected to the delivery pipeline, and the bottom end of the measuring inlet pipe 13 is connected to the main inlet pipe 2 through a switching valve 3. The water inlet flow indicator switch 131, the water outlet flow indicator switch 141, the switching valve 3, and the venting calibration valve 151 are all electrically connected to the controller.

[0031] When measuring the flow rate of the delivery pipeline, the controller controls the switching valve 3 to connect the main inlet pipe 2 and the measuring inlet pipe 13. When the fluid flows through the inlet flow indicator switch 131 of the measuring inlet pipe 13, the inlet flow indicator switch 131 obtains the timing start signal and feeds it back to the controller. The controller obtains the timing start signal and starts timing through the timer. When the fluid fills the standard constant volume chamber 1 and flows through the outlet flow indicator switch 141 of the measuring outlet pipe 14, the controller obtains the timing stop signal and stops timing. Based on the filling time of the standard constant volume chamber, the controller, based on the standard volume method, divides the standard volume value V (unit: cubic meters) of the standard constant volume chamber 1 by the measured filling time T (unit: minutes) to obtain the actual flow rate Q'=V / T (unit: cubic meters / minute), thus completing the measurement of the delivery pipeline flow rate. After the flow measurement and calibration device finishes measuring, the controller controls the venting calibration valve 151 to open the venting calibration valve 151 to discharge the fluid in the standard constant volume chamber 1.

[0032] Simultaneously, the controller compares the actual flow rate Q' measured by the flow measurement and calibration device with the flow rate measured by the flow meter at the downstream end of the pipeline to calibrate the flow meter. Specifically, the controller reads the cumulative flow rate of the flow meter being calibrated within the measurement period and calculates the average flow rate Qm. The average flow rate Qm is then compared with the actual flow rate Q' measured by the standard volumetric method to calculate the deviation rate E: E = (Qm - Q') / Q' × 100%. If the absolute value of the deviation rate E exceeds the allowable deviation range, the controller will issue an alarm.

[0033] Reference Figure 1 The standard volumetric cavity 1 includes a tank body 11 and a lid 12. The lid 12 is fitted onto the top of the tank body 11, and both the measuring inlet pipe 13 and the outlet calibration pipe are installed on the lid 12. An venting calibration pipe 15 is installed at the bottom of the tank body 11. In this embodiment, both the tank body 11 and the lid 12 are made of transparent plastic to facilitate observation of the interior of the standard volumetric cavity 1. In other embodiments, the tank body 11 and the lid 12 are also made of materials such as plexiglass, composite materials, corrosion-resistant carbon steel, and stainless steel.

[0034] Reference Figure 1 The tank body 11 is provided with a flow guide trough 10. Specifically, the flow guide trough 10 is spiral-shaped, with its two ends located at the top and bottom of the tank body 11, respectively. The top of the flow guide trough 10 is located directly below the connection between the measuring inlet pipe 13 and the tank cover 12. The flow guide trough 10 is used to buffer the fluid entering the standard constant volume chamber 1, thereby reducing the impact of inlet water level fluctuations and air bubbles on the outlet water flow indicator switch 141. In other embodiments, the flow guide trough 10 can also be configured as a cone-shaped cylinder with the tip pointing upwards.

[0035] Reference Figure 1A venting flow indicator switch 152 is also installed on the venting calibration pipe 15, and the venting flow indicator switch 152 is set higher than the venting calibration valve 151; the venting flow indicator switch 152 is electrically connected to the controller. When the controller controls the venting calibration valve 151 to fully open the venting calibration pipe 15 to discharge the fluid in the standard constant volume chamber 1, the controller starts the venting timer. When the venting flow indicator switch 152 detects the latest no-signal moment and there is no new signal for 10 seconds, the controller takes the latest no-signal moment as the venting termination moment, thereby obtaining the venting duration of the standard constant volume chamber 1. By comparing the venting duration with the venting duration of the standard constant volume chamber 1 in the initial state, it is possible to determine whether there is scaling inside the standard constant volume chamber 1, so as to remind the maintenance personnel to clean the inside of the standard constant volume chamber 1.

[0036] In this embodiment, the main water inlet pipe 2 is positioned below the measuring inlet pipe 13 and the measuring outlet pipe 14. In other embodiments, the height and orientation of the main water inlet pipe 2 are not limited; it can be higher, lower, or horizontal to the measuring inlet pipe 13 and the measuring outlet pipe 14.

[0037] The measuring inlet pipe 13, measuring outlet pipe 14, and venting calibration pipe 15 are all transparent pipes; the inlet water flow indicator switch 131, outlet water flow indicator switch 141, and venting water flow indicator switch 152 are all contactless water flow indicator switches, and are all installed on the corresponding positions of the pipes through pipe fixing brackets.

[0038] Reference Figure 1 Both the measuring outlet pipe 14 and the venting calibration pipe 15 are open to the atmosphere. The switching valve 3 is also connected to a siphon-breaking pipe 4. The end of the siphon-breaking pipe 4 furthest from the switching valve 3 is connected to the venting calibration pipe 15. With the siphon-breaking pipe 4 in place, after the subsequent flow measurement and calibration device completes the flow measurement, the controller controls the switching valve 3 to switch the connection between the siphon-breaking pipe 4 and the measuring inlet pipe 13. This allows residual fluid inside the measuring inlet pipe 13 to be discharged through the siphon-breaking pipe 4, reducing the possibility of residual water interfering with subsequent flow measurements. Connecting the siphon-breaking pipe 4 to the venting calibration pipe 15 allows the fluid discharged from the calibration drain pipe via the siphon-breaking pipe 4 to flow into the venting calibration pipe 15 and then be discharged through it, eliminating the need for additional discharge piping and effectively reducing piping complexity.

[0039] Reference Figure 1 The top of the measuring inlet pipe 13 is also equipped with a vacuum breaker valve 132. When the switching valve 3 is switched to connect the siphon pipe 4 with the measuring inlet pipe 13 to discharge the residual fluid inside the measuring inlet pipe 13, the vacuum breaker valve 132 can be manually opened to break the vacuum state inside the measuring inlet pipe 13 so that the residual fluid inside the measuring inlet pipe 13 can flow out better through the siphon pipe 4.

[0040] Reference Figure 1 The switching valve 3 is also connected to the water inlet branch pipe 5. The end of the water inlet branch pipe 5 away from the switching valve 3 is connected to the delivery pipeline. The water inlet branch pipe 5 and the measuring water inlet pipe 13 are set at the same height and have the same direction. The water inlet branch pipe 5 and the measuring water inlet pipe 13 have the same inner diameter.

[0041] When the flow measurement and calibration device is not in operation, the controller controls the switching valve 3 to connect the main inlet pipe 2 and the branch inlet pipe 5, so that the fluid in the main inlet pipe 2 flows through the branch inlet pipe 5 and then flows into the delivery pipeline. The branch inlet pipe 5 is used to balance the water loss generated when the fluid climbs up to measure the inlet pipe 13, thereby reducing the error between the flow rate measured by the flow meter at the rear end of the delivery pipeline and the flow rate measured by the flow measurement and calibration device.

[0042] In this embodiment, the switching valve 3 is a four-way valve. This allows the main inlet pipe 2 to be connected to the measuring inlet pipe 13 while the flow measurement and calibration device is running, and the siphon breaking pipe 4 to be connected to the inlet branch pipe 5; and the main inlet pipe 2 to be connected to the inlet branch pipe 5 while the flow measurement and calibration device is not running, and the siphon breaking pipe 4 to be connected to the measuring inlet pipe 13.

[0043] The implementation principle of this application embodiment is as follows: when the flow rate of the conveying pipeline is measured by the flow measurement and verification device, the controller controls the switching valve 3 to switch the main inlet pipe 2 to be connected to the measuring inlet pipe 13 so that the fluid enters the standard constant volume chamber 1. Then, the controller obtains the filling time of the standard constant volume chamber by feeding back signals through the inlet water flow indicator switch 131 and the outlet water flow indicator switch 141. The controller then obtains the flow rate value of the conveying pipeline by dividing the standard volume value of the standard constant volume chamber 1 by the filling time of the standard constant volume chamber, thus completing the measurement of the flow rate value of the conveying pipeline.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flow proving device for a fluid conveying pipe system, characterised in that: The system includes a controller, a standard volumetric cavity (1), and a main inlet pipe (2). The top of the standard volumetric cavity (1) is connected to a measuring inlet pipe (13) and a measuring outlet pipe (14). At the ends of the measuring inlet pipe (13) and the measuring outlet pipe (14) closest to the standard volumetric cavity (1), respectively, are installed an inlet water flow indicator switch (131) and an outlet water flow indicator switch (141). The bottom of the standard volumetric cavity (1) is connected to an venting calibration pipe (1). 5) The venting calibration pipe (15) is connected to the venting calibration valve (151); the main water inlet pipe (2) is connected to the delivery pipe, and the end of the measuring water inlet pipe (13) away from the standard constant volume chamber (1) is connected to the main water inlet pipe (2) through the switching valve (3); the water inlet flow indicator switch (131), the water outlet flow indicator switch (141), the venting calibration valve (151) and the switching valve (3) are all electrically connected to the controller.

2. A flow verification device for use in a fluid delivery tubing system as defined in claim 1, wherein: The switching valve (3) is also connected to the siphon breaking pipe (4).

3. A flow verification device for use in a fluid delivery tubing system as defined in claim 2, wherein: A vacuum breaker valve (132) is also installed at the top of the measuring water inlet pipe (13).

4. A flow verification device for use in a fluid delivery tubing system as defined in claim 2, wherein: The end of the siphon tube (4) away from the switching valve (3) is connected to the venting calibration tube (15).

5. A flow verification device for use in a fluid delivery tubing system as defined in claim 1, wherein: The venting calibration tube (15) is equipped with a venting water flow indicator switch (152), which is electrically connected to the controller.

6. A flow verification device for use in a fluid delivery tubing system as defined in claim 1, wherein: The standard constant volume cavity (1) includes a tank body (11) and a tank cover (12), with the tank cover (12) fitted onto the top opening of the tank body (11).

7. A flow verification device for use in a fluid delivery tubing system as defined in claim 6, wherein: The standard constant volume cavity (1) is equipped with a flow guide (10), which is spiral in shape. The top of the flow guide (10) is located below the connection between the measuring water inlet pipe (13) and the standard constant volume cavity (1), and the bottom of the flow guide (10) extends to the bottom of the standard constant volume cavity (1).

8. A flow measurement and verification device for a fluid transport pipeline system according to claim 6, characterized in that: Both the can body (11) and the can lid (12) are made of transparent plastic.

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