A centralized liquid storage and dispensing device with calibration alarm function

Abstract

The present invention relates to the technical field of liquid storage and distribution calibration devices, and specifically discloses a centralized liquid storage and distribution device with a calibration alarm function, including a drainage tank, a liquid inlet pipe is arranged on one side of the drainage tank, a plurality of valves are arranged between the drainage tank and the liquid inlet pipe, a turbine flowmeter is arranged below the liquid inlet pipe, a liquid outlet pipe is connected below the turbine flowmeter, a liquid storage tank is arranged on one side of the turbine flowmeter, a calibration box assembly is arranged on one side of the liquid outlet pipe, the calibration box assembly includes a calibration box connected to one end of an overflow pipe, a liquid inlet is arranged on one side of the calibration box, a liquid outlet near the bottom of the calibration box is arranged on the other side of the calibration box, a measuring plate is arranged above the liquid inlet and the liquid outlet, a signal connector is arranged above the measuring plate, and a pressure sensor is arranged above the signal connector. The device has a simple structure, the turbine flowmeter is convenient to calibrate, and it is convenient for staff to monitor and detect liquid flow data.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid storage and distribution calibration devices, and in particular to a centralized liquid storage and distribution device with a calibration alarm function. Background Art

[0002] Liquid storage and distribution is a complex system and an important part of modern industry, agriculture, commerce and family life. It involves the effective management and coordination of multiple links such as safe storage and accurate distribution of liquids. Safety, efficiency and compliance are key factors that must be considered in the design and implementation process. Through scientific management and advanced technical means, the efficiency and safety of liquid storage and distribution can be greatly improved.

[0003] The turbine flowmeter is an instrument used to measure fluid flow. It is widely used in the petroleum, chemical, water treatment and other industries. Its main working principle is to use the kinetic energy of the fluid to rotate the turbine. When the fluid passes through the flowmeter, the flow of the fluid causes the turbine to rotate. The rotation speed of the turbine is proportional to the flow rate, that is, the greater the flow rate, the faster the turbine rotates, and then the flow signal is converted into an electrical signal or a mechanical signal, which is convenient for subsequent data processing and monitoring.

[0004] Turbine flowmeter has the following advantages: 1. It has a fast response speed to flow changes and is suitable for measuring instantaneous flow changes; 2. It has a simple structure, low failure rate, relatively easy maintenance, and is easy to install in various pipelines; 3. It has a high cost-effectiveness. Compared with other flowmeters, the price of turbine flowmeter is relatively reasonable. Therefore, it is widely used in the fields of metering and monitoring of different liquid storage and distribution, as well as the measurement of liquid flow in chemical reaction processes.

[0005] However, the turbine flowmeter currently has the following technical problems during use: 1. Lag reaction: Due to changes in fluid characteristics (such as instantaneous flow velocity changes), the data of the turbine flowmeter may display a lag; 2. The rotor of the turbine flowmeter is worn or damaged due to long-term use, and electromagnetic interference, mechanical vibration, etc. may affect the signal output of the turbine flowmeter, resulting in inaccurate flow measurement; 3. During the flow of the fluid, if the instantaneous flow velocity is too large, causing the flow rate to exceed the rated flow range of the flowmeter, the turbine flowmeter may fail and need to be calibrated. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The problem to be solved by the present invention is to provide a centralized liquid storage and distribution device with a calibration alarm function to overcome the defects in the prior art.

[0008] (II) Technical solution

[0009] In order to solve the technical problem, the present invention provides a centralized liquid storage and distribution device with a calibration alarm function, comprising a drainage tank, a liquid inlet pipe is arranged on one side of the drainage tank, a plurality of valves are arranged between the drainage tank and the liquid inlet pipe, a turbine flowmeter is arranged below the liquid inlet pipe, a liquid outlet pipe is connected below the turbine flowmeter, and a liquid storage tank is arranged on one side of the turbine flowmeter;

[0010] The turbine flowmeter comprises a shell, one end of the shell is provided with a first connecting flange connected to the liquid inlet pipe, the other end of the shell is provided with a second connecting flange connected to the liquid outlet pipe, an electromagnetic sensor is provided above the shell, a guide column is provided inside the shell, one end of the guide column is provided with a first guide plate, a front driving impeller and a rear driving impeller coaxially installed with the first guide plate are provided in the middle of the guide column, a second guide plate is provided at the other end of the guide column, an overflow pipe is provided on one side of the liquid outlet pipe, and a calibration box assembly is provided on one side of the overflow pipe;

[0011] The calibration box assembly includes a calibration box connected to one end of the overflow pipe, a liquid inlet coaxial with the overflow pipe is provided on one side of the calibration box, a liquid outlet close to the bottom of the calibration box is provided on the other side of the calibration box, a measuring plate is provided above the liquid inlet and the liquid outlet, a signal connector is provided above the measuring plate, and a pressure sensor is provided above the signal connector.

[0012] Furthermore, when the liquid flows through the liquid inlet pipe to the turbine flowmeter, the standard flow data displayed by the turbine flowmeter at this time is recorded as A. The liquid flows through the liquid outlet pipe, flows into the overflow pipe, and enters the calibration box. The water flow flowing into the calibration box produces a water flow impact on the measuring plate above the calibration box, and pushes the measuring plate to a certain height H. The signal connector above the measuring plate receives the pressure signal at this time and transmits it to the pressure sensor. The display data of the pressure sensor is recorded as B. According to the relationship formula between flow and pressure: pressure = flow / area, the cross-sectional area of ​​the calibration box is set to S, and the corresponding flow is C=B×S. When A=C, it indicates that the actual water flow passing through the pipeline at this time is equal to the flow data displayed by the turbine flowmeter, and the turbine flowmeter is in normal working condition. When A>C, it indicates that the actual flow passing through the pipeline at this time is less than the flow data displayed by the turbine flowmeter. When A<C, it indicates that the actual flow passing through the pipeline at this time is greater than the flow data displayed by the turbine flowmeter.

[0013] Furthermore, the diameter of the liquid inlet is greater than the diameter of the liquid outlet, and the axis of the liquid inlet is parallel to the axis of the liquid outlet.

[0014] Furthermore, the measuring plate is parallel to the bottom plate of the calibration box, and the axis of the signal connector is perpendicular to the horizontal plane of the measuring plate.

[0015] Furthermore, a first valve, a second valve and a third valve are provided on one side of the drainage tank, a fourth valve is provided above the liquid outlet pipe, and a fifth valve is provided between the drainage tank and the liquid storage tank.

[0016] Furthermore, the signal connector is a columnar body, the signal connector is located between the measuring plate and the pressure sensor, and the axis of the signal connector and the axis of the pressure sensor are located on the same straight line.

[0017] Furthermore, the front driving impeller includes a front rotating shaft and front rotating blades, and the front rotating blades are located on the circumference of the front rotating shaft. The rear driving impeller includes a rear rotating shaft and rear rotating blades, and the rear rotating blades are located on the circumference of the rear rotating shaft.

[0018] Furthermore, the axis of the front rotating shaft and the axis of the guide column are located on the same straight line, and the rear rotating shaft and the guide column are coaxially arranged.

[0019] Furthermore, the front rotating blades and the rear rotating blades are arranged symmetrically.

[0020] Furthermore, the first guide plate and the second guide plate are arranged symmetrically relative to the guide column, and the front driving impeller and the rear driving impeller are located at the symmetry center of the guide column.

[0021] Beneficial Effects

[0022] 1. The present invention provides a centralized liquid storage and distribution device with a calibration alarm function. The calibration box assembly designed in the device has a circular liquid inlet on one side of the calibration box and is located on the same axis as the overflow pipe, and a circular liquid outlet adjacent to the bottom plate of the calibration box is provided on the other side of the calibration box. Liquid flowing into the calibration box from the overflow pipe enters from the liquid inlet and flows out from the liquid outlet. Since the aperture size of the liquid inlet is larger than the aperture size of the liquid outlet, this design method can ensure that during the liquid storage and flow process, the liquid storage amount in the calibration box can always maintain a stable water flow rate, so that the liquid is maintained within a certain water level line range, thereby avoiding the problem of exceeding the maximum volume of the calibration box and causing liquid overflow due to a long-term increase in water flow.

[0023] 2. The present invention provides a centralized liquid storage and distribution device with a calibration alarm function. A measuring plate is arranged in the calibration box, a signal connector is arranged above the measuring plate, and a pressure sensor is installed above the signal connector. Since the rotation speed of the driving impeller of the turbine flowmeter is proportional to the flow rate, when the turbine flow rate is maximum, the flow rate also reaches a maximum, the flow rate of the liquid flowing into the outlet pipe also reaches a maximum, and the flow rate and flow rate of the water flowing into the overflow pipe into the calibration box are both maximum. The calibration box assembly designed by the device can measure the impact of the water flow flowing into the calibration box through the measuring plate, and transmit it to the pressure sensor through the signal connector, so as to facilitate the measurement of the water pressure generated by the change of the liquid flow rate. The calibration box assembly has a simple structure and is easy to operate, which is convenient for the staff to monitor and detect data.

[0024] 3. The present invention provides a centralized liquid storage and distribution device with a calibration alarm function. The device records the flow data of the liquid when it flows through the turbine flowmeter through the liquid inlet pipe and the water pressure value measured by the pressure sensor arranged above the calibration box assembly, calculates the deviation between the actual water flow through the pipeline and the displayed flow of the turbine flowmeter, and compares the flow deviation with the standard deviation, thereby transmitting the pressure difference value to the electromagnetic sensor through the sensor line and sending an alarm signal to remind the staff to calibrate the turbine flowmeter. The device can improve the accuracy of liquid measurement and reduce measurement errors caused by aging, wear or environmental changes of the flowmeter. In addition, by monitoring and regularly calibrating the turbine flowmeter, potential problems can be discovered in time and its service life can be extended.

[0025] 4. The present invention provides a centralized liquid storage and distribution device with a calibration alarm function. The device is connected to a turbine flowmeter via a liquid inlet pipe. The lower part of the turbine flowmeter is connected to a liquid outlet pipe. An overflow pipe is arranged on one side of the liquid outlet pipe. One side of the overflow pipe is connected to a calibration box assembly. The device has a simple overall structure and is easy to install, which facilitates installation and maintenance during the centralized liquid storage and distribution process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A simplified diagram of the system structure of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0027] Figure 2 A first perspective view of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0028] Figure 3 A second perspective view of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0029] Figure 4 This is a structural diagram of a calibration box assembly of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0030] Figure 5 A schematic diagram of calibration work of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0031] Figure 6 This is a structural diagram of a turbine flowmeter of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0032] Figure 7 A cross-sectional view of a turbine flow meter of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0033] Figure 8 A front cross-sectional view of a turbine flowmeter of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention;

[0034] Fig. 9 This is a structural diagram of a driving impeller of a centralized liquid storage and distribution device with a calibration alarm function according to the present invention.

[0035] The names of the components corresponding to the reference numerals in the figure are: 1. liquid inlet pipe; 101. drainage tank; 102. first valve; 103. second valve; 104. third valve; 105. fourth valve; 106. fifth valve; 107. liquid storage tank; 2. turbine flowmeter; 201. electromagnetic sensor; 202. second connecting flange; 203. first guide plate; 204. second guide plate; 205. guide column; 206. front Driving impeller; 207, rear driving impeller; 208, casing; 209, first connecting flange; 210, front rotating shaft; 211, front rotating blades; 212, rear rotating shaft; 213, rear rotating blades; 3, liquid outlet pipe; 4, overflow pipe; 5, sensing line; 6, pressure sensor; 7, calibration box assembly; 701, calibration box; 702, signal connector; 703, measuring board; 704, liquid inlet; 705, liquid outlet. DETAILED DESCRIPTION

[0036] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0038] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0039] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0040] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0041] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0042] See also Figures 1 to 9 The present invention provides a centralized liquid storage and distribution device with a calibration alarm function, comprising a drainage tank 101, a liquid inlet pipe 1 is arranged on one side of the drainage tank 101, a plurality of valves are arranged between the drainage tank 101 and the liquid inlet pipe 1, a turbine flowmeter 2 is arranged below the liquid inlet pipe 1, a liquid outlet pipe 3 is connected below the turbine flowmeter 2, and a liquid storage tank 107 is arranged on one side of the turbine flowmeter 2;

[0043] The turbine flowmeter 2 includes a housing 208, one end of which is provided with a first connecting flange 209 connected to the liquid inlet pipe 1, the other end of which is provided with a second connecting flange 202 connected to the liquid outlet pipe 3, an electromagnetic sensor 201 is provided above the housing 208, a guide column 205 is provided inside the housing 208, one end of the guide column 205 is provided with a first guide plate 203, the middle of the guide column 205 is provided with a front driving impeller 206 and a rear driving impeller 207 coaxially installed with the first guide plate 203, and the other end of the guide column 205 is provided with a second guide plate 204; an overflow pipe 4 is provided on one side of the liquid outlet pipe 3, and a calibration box assembly 7 is provided on one side of the overflow pipe 4;

[0044] The calibration box assembly 7 includes a calibration box 701 connected to one end of the overflow pipe 4, a liquid inlet 704 coaxial with the overflow pipe 4 is arranged on one side of the calibration box 701, a liquid outlet 705 close to the bottom of the calibration box 701 is arranged on the other side of the calibration box 701, a measuring plate 703 is arranged above the liquid inlet 704 and the liquid outlet 705, a signal connector 702 is arranged above the measuring plate 703, and a pressure sensor 6 is arranged above the signal connector 702.

[0045] See also Figures 1 to 8 When the liquid flows through the liquid inlet pipe 1 to the turbine flowmeter 2, the standard flow data displayed by the turbine flowmeter 2 at this time is recorded as A. The liquid flows through the liquid outlet pipe 3, flows into the overflow pipe 4, and enters the calibration box 701. The water flow flowing into the calibration box 701 produces a water flow impact on the measuring plate 703 above the calibration box 701, and pushes the measuring plate 703 to a certain height H. The signal connector 702 above the measuring plate 703 receives the pressure signal at this time and transmits it to the pressure sensor 6. The display data of the pressure sensor 6 is recorded as B. According to the relationship between flow and pressure: pressure = flow / area, the cross-sectional area of ​​the calibration box 701 is set to S, and the corresponding flow is C=B×S. When A=C, it indicates that the actual water flow through the pipeline is equal to the flow data displayed by the turbine flowmeter 2, and the turbine flowmeter 2 is in normal working condition. When A>C, it indicates that the actual flow through the pipeline is less than the flow data displayed by the turbine flowmeter 2. When A<C, it indicates that the actual flow through the pipeline is greater than the flow data displayed by the turbine flowmeter 2.

[0046] See also Figures 2 to 5 The diameter of the liquid inlet 704 is greater than the diameter of the liquid outlet 705 , the axis of the liquid inlet 704 is parallel to the axis of the liquid outlet 705 , the measuring plate 703 is parallel to the bottom plate of the calibration box 701 , and the axis of the signal connector 702 is perpendicular to the horizontal plane of the measuring plate 703 .

[0047] See also Figures 1 to 3A first valve 102 , a second valve 103 and a third valve 104 are provided on one side of the drainage tank 101 , a fourth valve 105 is provided above the liquid outlet pipe 3 , and a fifth valve 106 is provided between the drainage tank 101 and the liquid storage tank 107 .

[0048] See also Figures 2 to 5 The signal connector 702 is a columnar body, and is located between the measuring plate 703 and the pressure sensor 6 . The axis of the signal connector 702 and the axis of the pressure sensor 6 are located on the same straight line.

[0049] See also Figures 3 to 9 The front driving impeller 206 includes a front rotating shaft 210 and a front rotating blade 211, and the front rotating blade 211 is located on the circumference of the front rotating shaft 210. The rear driving impeller 207 includes a rear rotating shaft 212 and a rear rotating blade 213, and the rear rotating blade 213 is located on the circumference of the rear rotating shaft 212.

[0050] See also Figures 3 to 9 The axis of the front rotating shaft 210 and the axis of the guide column 205 are located on the same straight line, and the rear rotating shaft 212 is coaxially arranged with the guide column 205.

[0051] See also Figures 6 to 9 The front rotating blades 211 and the rear rotating blades 213 are arranged symmetrically, the first guide plate 203 and the second guide plate 204 are arranged symmetrically relative to the guide column 205, and the front driving impeller 206 and the rear driving impeller 207 are located at the symmetry center of the guide column 205.

[0052] The working principle and specific working process of a centralized liquid storage and distribution device with a calibration alarm function are as follows: According to the system flow chart, the upper and lower sides of the turbine flowmeter 2 are connected to the liquid inlet pipe 1 and the liquid outlet pipe 3 in the system process, and the overflow pipe 4 is connected to the liquid outlet pipe 3, the calibration box assembly 7 is installed on one side of the overflow pipe 4, the sensor line 5 is connected to the electromagnetic sensor 201 of the turbine flowmeter 2, and the device is started.

[0053] When the fluid passes through the turbine flowmeter 2, the flow of the fluid causes the front drive impeller 206 and the rear drive impeller 207 to rotate. The rotation speed of the turbine is proportional to the flow rate, that is, the greater the flow rate, the faster the turbine rotates, and the flow signal is then converted into an electrical signal or a mechanical signal, which is convenient for subsequent data processing and monitoring. Open the first valve 102, the second valve 103, the third valve 104 and the fourth valve 105 on one side of the drainage tank 101, and the liquid flows through the liquid storage tank 107 and the turbine flowmeter 2 respectively. After the liquid flows through the liquid inlet pipe 1 to the turbine flowmeter 2, close the second valve 103, the fourth valve 105 and the fifth valve 106, and record the flow display data A1 of the turbine flowmeter 2 at this time. The liquid flows through the liquid outlet pipe 3, flows into the overflow pipe 4 on one side thereof, and enters the calibration box 701. At this time, the liquid flows into the calibration box The water flow of 701 generates a water flow impact on the measuring plate 703 above the calibration box 701, pushing the measuring plate 703 to a certain height H1. The signal connector 702 on the measuring plate 703 receives the pressure signal at this time and transmits it to the pressure sensor 6. According to the measured water pressure, the water pressure value B1 at this time is displayed. According to the relationship between flow and pressure: pressure = flow / area, the cross-sectional area of ​​the calibration box 701 is set to S. At this time, when the pressure is B1, the corresponding flow is C1=B1×S;

[0054] Open the closed second valve 103 and the fourth valve 105. When the water flow velocity reaches the maximum, close the second valve 103 and the fourth valve 105. Since the rotation speed of the driving impeller of the turbine flowmeter 2 is proportional to the flow rate, the flow rate reaches the maximum at this time. Record the maximum flow data A2 of the turbine flowmeter 2 at this time. At this time, the flow rate of the liquid flowing into the liquid outlet pipe 3 also reaches the maximum. The flow rate and flow velocity of the water flowing into the overflow pipe 4 into the calibration box 701 are both maximum. The water flow flowing into the calibration box 701 produces a large water flow impact on the measuring plate 703 above the calibration box 701, and pushes the measuring plate 703 to the water level line of the maximum threshold. Record the water level height H2 of the measuring plate 703 at this time, and record the maximum water pressure value B2 transmitted to the pressure sensor 6 through the signal connector 702 at this time. The corresponding flow rate is C2=B2×S;

[0055] The device keeps working, and continues to record the displayed data of the turbine flowmeter 2 and the water pressure value measured at the corresponding time. At a certain moment, the displayed flow data of the turbine flowmeter 2 is A11, and the pressure sensor 6 measures the water pressure value B11, and the flow is C11=B11×S. At this time, A11>C11, indicating that the actual water flow through the pipeline is less than the flow displayed by the turbine flowmeter 2. At this time, a flow deviation t1 (A11-C11) appears. The flow deviation at this time is compared with the standard deviation t0 (A1-C1), so that the pressure difference value is transmitted to the electromagnetic sensor 201, and an alarm signal is issued to remind the staff to calibrate the turbine flowmeter 2; when the turbine The displayed flow data of the turbine flowmeter 2 is A21, the pressure sensor 6 measures the water pressure value B21, and the flow rate is C21=B21×S. At this time, C21>A21, indicating that the actual water flow rate passing through the pipeline is greater than the flow rate displayed by the turbine flowmeter 2. At this time, the flow rate exceeds the threshold range of the turbine flowmeter 2. The flow deviation t2 (C21-A21) and the standard deviation t3 (C2-A2) at this time are compared, and the pressure difference value is transmitted to the electromagnetic sensor 201 via the sensor line 5. After comparing the electromagnetic sensor 201 with the standard value stored in itself, an alarm signal is issued to remind the staff that the turbine flowmeter 2 exceeds the threshold and the turbine flowmeter 2 is calibrated.

[0056] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0057] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A centralized liquid storage and distribution device with a calibration alarm function, characterized in that: Comprising a drainage tank (101), a liquid inlet pipe (1) is arranged on one side of the drainage tank (101), a plurality of valves are arranged between the drainage tank (101) and the liquid inlet pipe (1), a turbine flowmeter (2) is arranged below the liquid inlet pipe (1), a liquid outlet pipe (3) is connected below the turbine flowmeter (2), and a liquid storage tank (107) is arranged on one side of the turbine flowmeter (2); The turbine flowmeter (2) comprises a housing (208); one end of the housing (208) is provided with a first connecting flange (209) connected to the liquid inlet pipe (1); the other end of the housing (208) is provided with a second connecting flange (202) connected to the liquid outlet pipe (3); an electromagnetic sensor (201) is provided above the housing (208); a guide column (205) is provided inside the housing (208); one end of the guide column (205) is provided with a first guide plate (203); a front driving impeller (206) and a rear driving impeller (207) coaxially mounted with the first guide plate (203) are provided in the middle of the guide column (205); a second guide plate (204) is provided at the other end of the guide column (205); an overflow pipe (4) is provided on one side of the liquid outlet pipe (3); and a calibration box assembly (7) is provided on one side of the overflow pipe (4); The calibration box assembly (7) comprises a calibration box (701) connected to one end of the overflow pipe (4); a liquid inlet (704) coaxial with the overflow pipe (4) is provided on one side of the calibration box (701); a liquid outlet (705) close to the bottom of the calibration box (701) is provided on the other side of the calibration box (701); a measuring plate (703) is provided above the liquid inlet (704) and the liquid outlet (705); a signal connector (702) is provided above the measuring plate (703); and a pressure sensor (6) is provided above the signal connector (702); When the liquid flows through the liquid inlet pipe (1) to the turbine flowmeter (2), the standard flow data displayed by the turbine flowmeter (2) at this time is recorded as A. The liquid flows through the liquid outlet pipe (3), flows into the overflow pipe (4), and enters the calibration box (701). The water flow flowing into the calibration box (701) generates a water flow impact on the measuring plate (703) above the calibration box (701), pushing the measuring plate (703) to a certain height H. The signal connector (702) above the measuring plate (703) receives the pressure signal at this time and transmits it to the pressure sensor (6). The displayed data of the sensor (6) is recorded as B. According to the relationship between flow and pressure: pressure = flow / area, the cross-sectional area of ​​the calibration box (701) is set to S, and the corresponding flow is C = B × S. When A = C, it indicates that the actual water flow through the pipeline is equal to the flow data displayed by the turbine flowmeter (2), and the turbine flowmeter (2) is in a normal working state. When A>C, it indicates that the actual flow through the pipeline is less than the flow data displayed by the turbine flowmeter (2). When A<C, it indicates that the actual flow through the pipeline is greater than the flow data displayed by the turbine flowmeter (2).

2. A centralized liquid storage and distribution device with calibration alarm function according to claim 1, characterized in that: The diameter of the liquid inlet (704) is greater than the diameter of the liquid outlet (705), and the axis of the liquid inlet (704) is parallel to the axis of the liquid outlet (705).

3. A centralized liquid storage and distribution device with calibration alarm function according to claim 1, characterized in that: The measuring plate (703) is parallel to the bottom plate of the calibration box (701), and the axis of the signal connector (702) is perpendicular to the horizontal plane of the measuring plate (703).

4. A centralized liquid storage and distribution device with calibration alarm function according to claim 1, characterized in that: A first valve (102), a second valve (103) and a third valve (104) are provided on one side of the drainage tank (101), a fourth valve (105) is provided above the liquid outlet pipe (3), and a fifth valve (106) is provided between the drainage tank (101) and the liquid storage tank (107).

5. A centralized liquid storage and distribution device with calibration alarm function according to claim 1, characterized in that: The signal connector (702) is a columnar body, the signal connector (702) is located between the measuring plate (703) and the pressure sensor (6), and the axis of the signal connector (702) and the axis of the pressure sensor (6) are located on the same straight line.

6. A centralized liquid storage and distribution device with calibration alarm function according to claim 1, characterized in that: The front driving impeller (206) comprises a front rotating shaft (210) and a front rotating blade (211), wherein the front rotating blade (211) is located on the circumference of the front rotating shaft (210), and the rear driving impeller (207) comprises a rear rotating shaft (212) and a rear rotating blade (213), wherein the rear rotating blade (213) is located on the circumference of the rear rotating shaft (212).

7. A centralized liquid storage and distribution device with calibration alarm function according to claim 6, characterized in that: The axis of the front rotating shaft (210) and the axis of the guide column (205) are located on the same straight line, and the rear rotating shaft (212) and the guide column (205) are coaxially arranged.

8. A centralized liquid storage and distribution device with calibration alarm function according to claim 6, characterized in that: The front rotating blades (211) and the rear rotating blades (213) are arranged symmetrically.

9. A centralized liquid storage and distribution device with calibration alarm function according to claim 1, characterized in that: The first guide plate (203) and the second guide plate (204) are symmetrically arranged relative to the guide column (205), and the front driving impeller (206) and the rear driving impeller (207) are located at the symmetry center of the guide column (205).

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