Baffle type flowmeter testing method and device with self-cleaning control function

Abstract

The invention discloses a baffle type flowmeter testing method and device with a self-cleaning control function, and relates to the technical field of flow test.The device comprises a low-level water tank, a high-level water tank, a high-level water supplementing pipeline, a low-level water supplementing pipeline and a controller; the device further comprises a filter, a water replenishing check valve, a water replenishing pump, a water inlet electric valve, a first standard flowmeter, a to-be-measured baffle flowmeter, a second standard flowmeter, a water outlet electric valve, a high water level switch, a low water level switch and a self-cleaning motor. According to the scheme, the later maintenance difficulty and the maintenance frequency increase of the baffle type flow meter are reduced, and whether the precision of the flow meter meets the operation requirement or not is measured by combining automatic verification and automatic cleaning tests of the baffle type flow meter used on site at regular overhaul periods, and whether the baffle type flow meter is qualified or not is judged. The test accuracy and the test efficiency are effectively improved, and abnormal shutdown of equipment caused by inaccurate measurement value of the flow meter is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of flow measurement, and more specifically, to the technical field of a test method and device for a baffle flowmeter with a self-cleaning control function. Background Art

[0002] Flowmeters based on various principles are widely used in hydropower stations, mainly used to monitor whether the flow rates of water systems and oil systems meet the operating requirements of hydropower equipment. Once the flow rate does not meet the equipment operating requirements, it may cause abnormal shutdown of some equipment. More seriously, it may cause unplanned shutdown of hydropower units, and the hydropower station will be subject to unplanned shutdown assessment by the power grid. Therefore, the requirements for the accuracy and real-time performance of flow measurement by flowmeters are getting higher and higher, which has promoted the development of more accurate flowmeters. However, there are still the following problems in the actual operation of flowmeters: pipeline blockage may lead to abnormal flow measurement values, making it impossible to determine the cause of the failure, incomplete data acquisition, inaccurate flow calculation, inability to achieve automatic calibration and automatic cleaning of the flowmeter, etc. Summary of the Invention

[0003] The purpose of the present invention is to provide a test method and device for a baffle flowmeter with a self-cleaning control function in order to solve the above technical problems.

[0004] Specifically, the present invention adopts the following technical solutions to achieve the above purpose:

[0005] A first aspect of the present invention provides a test method and device for a baffle flowmeter with a self-cleaning control function, including a low-level water tank, a high-level water tank, a high-level water supply pipeline, a low-level water supply pipeline, and a controller;

[0006] One end of the high-level water supply pipeline extends to the inner bottom of the low-level water tank, and the other end extends to the inner top of the high-level water tank. A filter, a water supply check valve, and a water supply pump are sequentially arranged on the high-level water supply pipeline from bottom to top;

[0007] One end of the low-level water supply pipeline is connected to the inner bottom of the high-level water tank, and the other end is connected to the inner top of the low-level water tank. An inlet electric valve, a first standard flowmeter, a to-be-tested baffle flowmeter, a second standard flowmeter, and an outlet electric valve are sequentially arranged on the low-level water supply pipeline from top to bottom;

[0008] Two water level switches for automatically collecting water levels are arranged in the high-level water tank, namely a high water level switch and a low water level switch, which are used to control the automatic start and stop of the water supply pump to supply water to the high-level water tank;

[0009] The filter, the water supply check valve, the water supply pump, the inlet electric valve, the first standard flowmeter, the to-be-tested baffle flowmeter, the second standard flowmeter, the outlet electric valve, the high water level switch, and the low water level switch are all connected to the controller by signals.

[0010] Specifically, two water level switches for automatically collecting water levels are arranged in the high-level water tank, namely the high-level switch and the low-level switch, which are used to control the automatic start and stop of the water replenishment pump to replenish water for the high-level water tank;

[0011] When the water level in the high-level water tank is lower than the low-level switch position, the low-level switch will be activated, and the water supply pump will start to pump the water in the low-level water tank into the high-level water tank. A water supply check valve and a filter are installed between the water supply pump and the low-level water tank.

[0012] When the water level in the high-level water tank is higher than the high-level switch position, the high-level switch is activated, the water supply pump stops running, and the water supply stops. The water supply check valve is mainly used to prevent the water in the high-level water tank from flowing directly from the high-level water tank to the low-level water tank after the water supply pump stops operating, and effectively prevents the water supply pump motor from reversing. The filter ensures that the water source of the water supply pump has a certain degree of cleanliness to prevent the flow meter from affecting the measurement accuracy during the test.

[0013] The water inlet electric valve and the water outlet electric valve are mainly used to cut off the water source and test the baffle flowmeter to be tested at various openings. When the baffle flowmeter to be tested needs to be installed, the water inlet electric valve and the water outlet electric valve are fully closed; when the baffle flowmeter to be tested needs to be tested, the water inlet electric valve and the water outlet electric valve are synchronously opened to 25%, 50%, 75%, and 100% of the opening respectively, and the flow values ​​of the baffle flowmeter to be tested at various openings are recorded at the same time. The flow values ​​of the first standard flowmeter and the second standard flowmeter at various openings are also recorded for the subsequent calculation of the flow accuracy of the baffle flowmeter to be tested.

[0014] In one embodiment, a self-cleaning motor is provided in the baffle flow meter to be tested.

[0015] In one embodiment, the baffle flowmeter to be tested includes a housing, an adjustable baffle disposed in the housing, an inlet and an outlet, the inlet and the outlet are connected to the interior of the housing, and the adjustable baffle is rotatably disposed in the housing.

[0016] In one embodiment, the self-cleaning motor includes a motor disposed in a housing, an inlet baffle lower limit position disposed at the inlet, an outlet baffle lower limit position disposed at the outlet, a lower limit detector, and an upper limit detector;

[0017] The adjustable baffle is connected to the output shaft of the motor; the lower limit detector is set at the lower limit position of the inlet baffle, and the upper limit detector is set at the lower limit position of the outlet baffle. The motor drives the adjustable baffle to rotate between the lower limit position of the inlet baffle and the lower limit position of the outlet baffle.

[0018] Specifically, when some measured values ​​are found to be too large during the test, the self-cleaning motor starts to run, and the upper and lower limit detectors are used to swing back and forth to automatically clean the dirt inside the baffle flowmeter to be tested. It generally runs 2-3 strokes, and the self-cleaning motor stops running after cleaning is completed; the water inlet electric valve and the water outlet electric valve are repeatedly opened to 25%, 50%, 75%, and 100% of the opening respectively, and the flow values ​​of the baffle flowmeter to be tested at each opening are recorded, and the flow values ​​of the first standard flowmeter and the second standard flowmeter at each opening are also recorded; after the calibration is completed, the water inlet electric valve and the water outlet electric valve are fully closed synchronously, and the test personnel remove the baffle flowmeter to be tested.

[0019] In one embodiment, an observation window is provided on the housing.

[0020] In one embodiment, the controller includes a test data acquisition module, a water replenishment pump automatic control module, a test data calculation module, a self-cleaning function motor module and a test end module.

[0021] A second aspect of the present invention provides a method for testing a baffle flow meter with a self-cleaning control function, using the above-mentioned baffle flow meter testing device with a self-cleaning control function, comprising the following steps:

[0022] S1. Install the above-mentioned baffle flowmeter test device, fix the flange plate of the baffle flowmeter to be tested with bolts to ensure that there is no water leakage, connect the signal wiring required to collect the baffle flowmeter to be tested, and check that other wiring of the baffle flowmeter test device is intact; ensure that all wiring is intact and in good contact.

[0023] S2, power-on initialization, the controller checks whether the water inlet electric valve, the first standard flow meter, the second standard flow meter, the water outlet electric valve, the self-cleaning motor, the status of the baffle flow meter to be tested, and the signal acquisition are normal; if the detection signal channel is normal, it jumps to the test data acquisition module and the water supply pump automatic control module, otherwise it jumps to the end test module and reports the unavailable signal of the baffle flow meter test device.

[0024] S3, the control function of the water supply pump automatic control module is as follows: when the water level in the high-level water tank is lower than the low-level switch position, the low-level switch is activated, the water supply pump starts to run, and the water in the low-level water tank is pumped to the high-level water tank; when the water level in the water tower is higher than the high-level switch position, the high-level switch is activated, the water supply pump stops running, and the water supply stops, and this cycle continues;

[0025] S4. The test data acquisition module records the flow rate values QX_0, Q1_0, and Q2_0 of the to-be-tested orifice flowmeter, the first standard flowmeter, and the second standard flowmeter respectively when the inlet electric valve and the outlet electric valve are fully closed (i.e., the opening degree is 0%); after the data recording is completed, the inlet electric valve and the outlet electric valve are then opened to 25% valve opening degree, and the flow rate values QX_1, Q1_1, and Q2_1 of the to-be-tested orifice flowmeter, the first standard flowmeter, and the second standard flowmeter are recorded respectively at this moment; after the data recording is completed, the inlet electric valve and the outlet electric valve are then opened to 50% valve opening degree, and the flow rate values QX_2, Q1_2, and Q2_2 of the to-be-tested orifice flowmeter, the first standard flowmeter, and the second standard flowmeter are recorded respectively at this moment; after the data recording is completed, the inlet electric valve and the outlet electric valve are then opened to 75% valve opening degree, and the flow rate values QX_3, Q1_3, and Q2_3 of the to-be-tested orifice flowmeter, the first standard flowmeter, and the second standard flowmeter are recorded respectively at this moment; after the data recording is completed, the inlet electric valve and the outlet electric valve are then opened to 100% valve opening degree, and the flow rate values QX_4, Q1_4, and Q2_4 of the to-be-tested orifice flowmeter, the first standard flowmeter, and the second standard flowmeter are recorded respectively at this moment;

[0026] After the test data module completes data acquisition, it jumps to the test data calculation module;

[0027] S5: The test data calculation module calculates whether the flow rate value QX of the to-be-tested orifice flowmeter at each moment in step S4 is between α times and β times of half of the sum of the flow rate values Q1 and Q2 of the first standard flowmeter and the second standard flowmeter, that is, α(Q1 + Q2) / 2 ≤ QX ≤ β(Q1 + Q2) / 2;

[0028] If the flow rate calculation values at each moment all meet the above conditions, the flow rate test data of the to-be-tested orifice flowmeter is qualified and displayed in green, and at the same time, it jumps to the end test module; otherwise, it jumps to the self-cleaning function motor module;

[0029] S6: Self-cleaning function motor module. The self-cleaning motor starts to run, and the internal dirt of the verified baffle flowmeter is removed by the forward and reverse rotation of the self-cleaning motor to drive the reciprocating swing. When the self-cleaning motor rotates forward, it drives the self-cleaning handle to swing. When the upper limit detector acts, the motor stops rotating forward. Then, when the self-cleaning motor rotates in reverse, it drives the self-cleaning handle to swing in the opposite direction. When the lower limit detector acts, the motor stops rotating in reverse. Run 2 - 3 strokes according to the above method. After cleaning, the self-cleaning motor stops running. At this time, jump to step S4, and repeat step S4 and step S5 once. If the flow calculation values at each moment in step S5 all meet the flow-related test conditions, the flow test data of the baffle flowmeter to be measured is qualified and displayed in green. At the same time, jump to the end test module. Otherwise, jump to the end test module, and report that the flow calibration data of the baffle flowmeter to be measured is unqualified, and it is recommended to replace the flowmeter.

[0030] In one embodiment, in step S5, α is taken as 0.95 and β is taken as 1.05.

[0031] In one embodiment, in step S5, when the valve openings of the inlet electric valve and the outlet electric valve are 0%, it is judged whether the flow value QX_0 of the baffle flowmeter to be measured satisfies α(Q1_0 + Q2_0)

[0032] / 2 ≤ QX_0 ≤ β(Q1_0 + Q2_0) / 2. If it is satisfied, the flowmeter test at this measurement point is qualified;

[0033] When the valve openings of the inlet electric valve and the outlet electric valve are 25%, it is judged whether the flow value QX_1 of the baffle flowmeter to be measured satisfies α(Q1_1 + Q2_1) / 2 ≤ QX_1 ≤ β(Q1_1 + Q2_1) / 2. If it is satisfied, the flowmeter test at this measurement point is qualified;

[0034] When the valve openings of the inlet electric valve and the outlet electric valve are 50%, it is judged whether the flow value QX_2 of the baffle flowmeter to be measured satisfies α(Q1_2 + Q2_2) / 2 ≤ QX_2 ≤ β(Q1_2 + Q2_2) / 2. If it is satisfied, the flowmeter test at this measurement point is qualified;

[0035] When the valve openings of the inlet electric valve and the outlet electric valve are 75%, it is judged whether the flow value QX_3 of the baffle flowmeter to be measured satisfies α(Q1_3 + Q2_3) / 2 ≤ QX_3 ≤ β(Q1_3 + Q2_3) / 2. If it is satisfied, the flowmeter test at this measurement point is qualified;

[0036] When the valve openings of the inlet electric valve and the outlet electric valve are 100%, it is judged whether the flow value QX_4 of the baffle flowmeter to be measured satisfies α(Q1_4 + Q2_4) / 2 ≤ QX_4 ≤ β(Q1_4 + Q2_4) / 2. If it is satisfied, the flowmeter test at this measurement point is qualified;

[0037] When the above conditions are met in all of the above five cases, the flow rate test of the baffle flowmeter to be tested is qualified, and at the same time, it jumps to the end test module; if not all of the above five cases meet the above conditions, it jumps to the self-cleaning function motor module.

[0038] The beneficial effects of the present invention are as follows:

[0039] 1. This solution reduces the later maintenance difficulty and increases the maintenance frequency of the baffle flowmeter, extends the service life and reduces the operation cost. On the premise of ensuring the safe, economic and reliable operation of the equipment, it is necessary to combine regular maintenance to realize the automatic calibration and automatic cleaning test of the baffle flowmeter used on site, to measure whether the accuracy of the flowmeter meets the operation requirements, and to determine whether the baffle flowmeter is qualified. This effectively improves the accuracy and efficiency of the test, and effectively prevents the abnormal shutdown of the equipment caused by inaccurate measurement values of the flowmeter.

[0040] 2. Through testing, not only can the measurement accuracy of the baffle flowmeter be improved, the automation measurement level be greatly improved, but also the later maintenance difficulty and maintenance frequency of the baffle flowmeter can be reduced, the service life be extended and the operation cost be reduced.

[0041] 3. The method of realizing full-automatic calibration and automatic cleaning can be achieved through programming, which is easy to implement, has good economy, and effectively improves the accuracy and efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0043] Figure 1 It is a schematic structural diagram of a baffle flowmeter test device with a self-cleaning control function of the present invention.

[0044] Figure 2 It is a flowchart of a baffle flowmeter test method with a self-cleaning control function.

[0045] Reference numerals:

[0046] B1 - low-level water tank, B2 - high-level water tank, F1 - filter, Y1 - make-up water check valve, M3 - make-up water pump, M1 - inlet electric valve, Q1 - first standard flowmeter, Qx - baffle flowmeter to be tested, Q2 - second standard flowmeter, M2 - outlet electric valve, L1 - high water level switch, L2 - low water level switch. Detailed Implementation Modes

[0047] To make the technical problems, technical solutions and technical effects of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0049] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0050] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", "above", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0051] Embodiment 1

[0052] As Figure 1 to Figure 1 shown, this embodiment provides a baffle flowmeter test device with a self-cleaning control function, including a low-level water tank B1, a high-level water tank B2, a high-level water replenishing pipeline, a low-level water replenishing pipeline, and a controller;

[0053] One end of the high-level water replenishing pipeline extends to the inner bottom of the low-level water tank B1, and the other end extends to the inner top of the high-level water tank B2. A filter F1, a water replenishing check valve Y1, and a water replenishing pump M3 are sequentially arranged on the high-level water replenishing pipeline from bottom to top;

[0054] One end of the low-level water supply pipe is connected to the inner bottom of the high-level water tank B2, and the other end is connected to the inner top of the low-level water tank B1. An inlet electric valve M1, a first standard flowmeter Q1, a to-be-tested baffle flowmeter Qx, a second standard flowmeter Q2, and an outlet electric valve M2 are sequentially arranged on the low-level water supply pipe from top to bottom.

[0055] Two water level switches for automatically collecting water levels are arranged in the high-level water tank B2, namely a high water level switch L1 and a low water level switch L2, which are used to control the automatic start and stop of the water supply pump M3 to replenish water for the high-level water tank B2.

[0056] The filter F1, the water supply check valve Y1, the water supply pump M3, the inlet electric valve M1, the first standard flowmeter Q1, the to-be-tested baffle flowmeter Qx, the second standard flowmeter Q2, the outlet electric valve M2, the high water level switch L1, and the low water level switch L2 are all connected to the controller in signal.

[0057] Specifically, two water level switches for automatically collecting water levels are arranged in the high-level water tank B2, namely a high water level switch L1 and a low water level switch L2, which are used to control the automatic start and stop of the water supply pump M3 to replenish water for the high-level water tank B2.

[0058] When the water level in the high-level water tank B2 is lower than the position of the low water level switch L2, the low water level switch L2 acts, and the water supply pump M3 starts to operate, pumping the water in the low-level water tank B1 into the high-level water tank B2. A water supply check valve Y1 and a filter F1 are respectively installed between the water supply pump M3 and the low-level water tank B1.

[0059] When the water level in the high-level water tank B2 is higher than the position of the high water level switch L1, the high water level switch L1 acts, and the water supply pump M3 stops operating and stops replenishing water. The water supply check valve Y1 is mainly used to prevent the water in the high-level water tank B2 from directly flowing back to the low-level water tank B1 from the high-level water tank B2 after the water supply pump M3 stops operating, and at the same time effectively prevents the motor of the water supply pump M3 from reversing. The filter F1 ensures a certain cleanliness of the water source of the water supply pump M3 and prevents affecting the measurement accuracy during the flowmeter test.

[0060] The inlet electric valve M1 and the outlet electric valve M2 are mainly used to cut off the water source and test the to-be-tested baffle flowmeter Qx at various openings. When the to-be-tested baffle flowmeter Qx needs to be installed, the inlet electric valve M1 and the outlet electric valve M2 are both fully closed; when the to-be-tested baffle flowmeter Qx is needed, the inlet electric valve M1 and the outlet electric valve M2 are synchronously opened to 25%, 50%, 75%, and 100% of the opening respectively, and the flow values of the to-be-tested baffle flowmeter Qx at each opening are recorded at the same time, and the flow values of the first standard flowmeter Q1 and the second standard flowmeter Q2 at each opening are also recorded, which are used for subsequent calculation of the flow accuracy of the to-be-tested baffle flowmeter Qx.

[0061] Example 2

[0062] This embodiment is further optimized on the basis of embodiment 1, specifically:

[0063] The baffle flowmeter Qx to be tested is provided with a self-cleaning motor M4.

[0064] The baffle flowmeter Qx to be tested includes a housing, an adjustable baffle disposed in the housing, an inlet and an outlet, wherein the inlet and the outlet are connected to the interior of the housing, and the adjustable baffle is rotatably disposed in the housing.

[0065] The self-cleaning motor M4 includes a motor arranged in the housing, an inlet baffle lower limit position arranged at the inlet, an outlet baffle lower limit position arranged at the outlet, a lower limit detector SQ1 and an upper limit detector SQ2;

[0066] The adjustable baffle is connected to the output shaft of the motor; the lower limit detector SQ1 is set at the lower limit position of the inlet baffle, and the upper limit detector SQ2 is set at the lower limit position of the outlet baffle, and the motor drives the adjustable baffle to rotate between the lower limit position of the inlet baffle and the lower limit position of the outlet baffle.

[0067] Specifically, when some measured values ​​are found to be too large during the test, the self-cleaning motor M4 starts to run, and automatically cleans the internal dirt of the baffle flowmeter Qx to be tested by swinging back and forth through the upper and lower limit detectors. It generally runs 2-3 strokes, and the self-cleaning motor M4 stops running after cleaning is completed; the water inlet electric valve M1 and the water outlet electric valve M2 are repeatedly opened to 25%, 50%, 75%, and 100% of the opening respectively, and the flow values ​​of the baffle flowmeter Qx to be tested at each opening are recorded, and the flow values ​​of the first standard flowmeter Q1 and the second standard flowmeter Q2 at each opening are also recorded; after the calibration is completed, the water inlet electric valve M1 and the water outlet electric valve M2 are fully closed synchronously, and the test personnel remove the baffle flowmeter Qx to be tested.

[0068] The shell is provided with an observation window.

[0069] The controller comprises a test data acquisition module, a water replenishment pump automatic control module, a test data calculation module, a self-cleaning function motor module and a test end module.

[0070] Example 3

[0071] like Figure 2 As shown, this embodiment provides a method for testing a baffle flow meter with a self-cleaning control function, comprising the following steps:

[0072] S1. Install the above baffle flowmeter test device, fix the flange plate of the baffle flowmeter Qx to be measured with bolts to ensure no water leakage, connect the signal wiring that needs to collect the baffle flowmeter Qx to be measured, and at the same time check that other wiring of the baffle flowmeter test device is intact; ensure that all wiring is intact and in good contact.

[0073] S2. Power on and initialize. The controller checks the states of the inlet water solenoid valve M1, the first standard flowmeter Q1, the second standard flowmeter Q2, the outlet water solenoid valve M2, the self-cleaning motor M4, the baffle flowmeter Qx to be measured, and whether the signal acquisition is normal; if the detected signal channel is normal, jump to the test data acquisition module and the make-up water pump automatic control module, otherwise jump to the end test module and report that the baffle flowmeter test device is unavailable.

[0074] S3. The control function of the make-up water pump automatic control module is as follows: when the water level in the high-level water tank B2 is lower than the position of the low water level switch L2, the low water level switch L2 acts, and the make-up water pump M3 starts to operate, pumping the water in the low-level water tank B1 to the high-level water tank B2. When the water level in the water tower is higher than the position of the high water level switch L1, the high water level switch L1 acts, and the make-up water pump M3 stops operating and stops replenishing water, and this cycle continues;

[0075] S4. The test data acquisition module records when the inlet water solenoid valve M1 and the outlet water solenoid valve M2 are fully closed, that is, the opening degree is 0%, and records the flow values of the baffle flowmeter Qx to be measured, the first standard flowmeter Q1, and the second standard flowmeter Q2 at this moment as QX_0, Q1_0, and Q2_0 respectively; after the data recording is completed, then open the inlet water solenoid valve M1 and the outlet water solenoid valve M2 to 25% valve opening degree, and record the flow values of the baffle flowmeter Qx to be measured, the first standard flowmeter Q1, and the second standard flowmeter Q2 at this moment as QX_1, Q1_1, and Q2_1 respectively; after the data recording is completed, then open the inlet water solenoid valve M1 and the outlet water solenoid valve M2 to 50% valve opening degree, and record the flow values of the baffle flowmeter Qx to be measured, the first standard flowmeter Q1, and the second standard flowmeter Q2 at this moment as QX_2, Q1_2, and Q2_2 respectively; after the data recording is completed, then open the inlet water solenoid valve M1 and the outlet water solenoid valve M2 to 75% valve opening degree, and record the flow values of the baffle flowmeter Qx to be measured, the first standard flowmeter Q1, and the second standard flowmeter Q2 at this moment as QX_3, Q1_3, and Q2_3 respectively; after the data recording is completed, then open the inlet water solenoid valve M1 and the outlet water solenoid valve M2 to 100% valve opening degree, and record the flow values of the baffle flowmeter Qx to be measured, the first standard flowmeter Q1, and the second standard flowmeter Q2 at this moment as QX_4, Q1_4, and Q2_4 respectively;

[0076] After the test data module completes data acquisition, it jumps to the test data calculation module.

[0077] S5: The test data calculation module calculates whether the flow rate value QX of the baffle flowmeter Qx to be measured at each moment in step S4 is between α times and β times of half of the sum of the flow rate values Q1 and Q2 of the first standard flowmeter Q1 and the second standard flowmeter Q2, that is, α(Q1 + Q2) / 2 ≤ QX ≤ β(Q1 + Q2) / 2; preferably, α is 0.95 and β is 1.05.

[0078] If the flow rate calculation values at each moment all meet the above conditions, the flow rate test data of the baffle flowmeter Qx to be measured is qualified, and it is displayed in green. At the same time, it jumps to the end test module; otherwise, it jumps to the self-cleaning function motor module:

[0079] When the opening degrees of the inlet electric valve M1 and the outlet electric valve M2 are 0%, it is judged whether the flow rate value QX_0 of the baffle flowmeter Qx to be measured satisfies α(Q1_0 + Q2_0) / 2 ≤ QX_0 ≤ β(Q1_0 + Q2_0) / 2. If it is satisfied, the flowmeter test at this measuring point is qualified;

[0080] When the opening degrees of the inlet electric valve M1 and the outlet electric valve M2 are 25%, it is judged whether the flow rate value QX_1 of the baffle flowmeter Qx to be measured satisfies α(Q1_1 + Q2_1) / 2 ≤ QX_1 ≤ β(Q1_1 + Q2_1) / 2. If it is satisfied, the flowmeter test at this measuring point is qualified;

[0081] When the opening degrees of the inlet electric valve M1 and the outlet electric valve M2 are 50%, it is judged whether the flow rate value QX_2 of the baffle flowmeter Qx to be measured satisfies α(Q1_2 + Q2_2) / 2 ≤ QX_2 ≤ β(Q1_2 + Q2_2) / 2. If it is satisfied, the flowmeter test at this measuring point is qualified;

[0082] When the opening degrees of the inlet electric valve M1 and the outlet electric valve M2 are 75%, it is judged whether the flow rate value QX_3 of the baffle flowmeter Qx to be measured satisfies α(Q1_3 + Q2_3) / 2 ≤ QX_3 ≤ β(Q1_3 + Q2_3) / 2. If it is satisfied, the flowmeter test at this measuring point is qualified;

[0083] When the opening degrees of the inlet electric valve M1 and the outlet electric valve M2 are 100%, it is judged whether the flow rate value QX_4 of the baffle flowmeter Qx to be measured satisfies α(Q1_4 + Q2_4) / 2 ≤ QX_4 ≤ β(Q1_4 + Q2_4) / 2. If it is satisfied, the flowmeter test at this measuring point is qualified;

[0084] When all the above 5 cases meet the above conditions, the flow rate test of the baffle flowmeter Qx to be measured is qualified, and it jumps to the end test module at the same time; if not all of the above 5 cases meet the above conditions, it jumps to the self-cleaning function motor module.

[0085] S6: Self-cleaning function motor module, the self-cleaning motor M4 starts running, and the dirt inside the baffle flow meter being calibrated is removed by the self-cleaning motor M4 rotating back and forth in the forward and reverse directions. When the self-cleaning motor M4 rotates forward, it drives the self-cleaning handle to swing. When the upper limit detector SQ2 is activated, the motor stops and M4 rotates forward. Then, when the self-cleaning motor M4 reverses, it drives the self-cleaning handle to swing reversely. When the lower limit detector SQ1 is activated, the motor stops and M4 reverses. According to the above method, run 2-3 strokes. After the cleaning is completed, the self-cleaning motor M4 stops running. At this time, jump to step S4 and repeat step S4 and step S5 once. If the flow calculation values ​​at each moment in step S5 meet the flow-related test conditions, the flow test data of the baffle flow meter Qx to be tested is qualified and displayed in green, and jump to the end test module at the same time. Otherwise, jump to the end test module, and report that the flow verification data of the baffle flow meter Qx to be tested is unqualified, and it is recommended to replace the flow meter.

Claims

1. A baffle flow meter test device with self-cleaning control function, characterized in that: It includes a low-level water tank (B1), a high-level water tank (B2), a high-level water supply pipe, a low-level water supply pipe and a controller; One end of the high-level water supply pipeline extends to the bottom of the low-level water tank (B1), and the other end extends to the top of the high-level water tank (B2). The high-level water supply pipeline is provided with a filter (F1), a water supply check valve (Y1) and a water supply pump (M3) in sequence from bottom to top; One end of the low-level water supply pipeline is connected to the bottom of the high-level water tank (B2), and the other end is connected to the top of the low-level water tank (B1). The low-level water supply pipeline is provided with a water inlet electric valve (M1), a first standard flow meter (Q1), a baffle flow meter to be tested (Qx), a second standard flow meter (Q2) and a water outlet electric valve (M2) from top to bottom. Two water level switches for automatically collecting water levels are arranged in the high-level water tank (B2), namely a high-level water switch (L1) and a low-level water switch (L2), which are used to control the water replenishment pump (M3) to automatically start and stop to replenish water for the high-level water tank (B2); The filter (F1), the water replenishment check valve (Y1), the water replenishment pump (M3), the water inlet electric valve (M1), the first standard flow meter (Q1), the baffle flow meter to be tested (Qx), the second standard flow meter (Q2), the water outlet electric valve (M2), the high water level switch (L1) and the low water level switch (L2) are all connected to the controller signal.

2. A baffle flow meter test device with self-cleaning control function according to claim 1, characterized in that: A self-cleaning motor (M4) is arranged in the baffle flowmeter (Qx) to be measured.

3. A baffle flow meter test device with self-cleaning control function according to claim 2, characterized in that: The baffle flowmeter (Qx) to be measured includes a shell, an adjustable baffle arranged in the shell, an inlet and an outlet, the inlet and the outlet are connected to the inside of the shell, and the adjustable baffle is rotatably arranged in the shell.

4. A baffle flow meter test device with self-cleaning control function according to claim 3, characterized in that: The self-cleaning motor (M4) comprises a motor arranged in the housing, a lower limit position of an inlet baffle arranged at the inlet, a lower limit position of an outlet baffle arranged at the outlet, a lower limit detector (SQ1) and an upper limit detector (SQ2); The adjustable baffle is connected to the output shaft of the motor; the lower limit detector (SQ1) is set at the lower limit position of the inlet baffle, and the upper limit detector (SQ2) is set at the lower limit position of the outlet baffle, and the motor drives the adjustable baffle to rotate between the lower limit position of the inlet baffle and the lower limit position of the outlet baffle.

5. The baffle flow meter test device with self-cleaning control function according to claim 3, characterized in that: The shell is provided with an observation window.

6. The baffle flow meter test device with self-cleaning control function according to claim 1, characterized in that: The controller comprises a test data acquisition module, a water replenishment pump automatic control module, a test data calculation module, a self-cleaning function motor module and a test end module.

7. A method for testing a baffle flowmeter with a self-cleaning control function, characterized in that: A baffle flow meter test device with a self-cleaning control function as described in any one of claims 1 to 6 is used.

8. A method for testing a baffle flowmeter with a self-cleaning control function according to claim 7, characterized in that: The steps include: S1. Install the above-mentioned baffle flowmeter test device, fix the flange plate of the baffle flowmeter (Qx) to be tested with bolts to ensure that there is no water leakage, connect the signal wiring of the baffle flowmeter (Qx) to be tested, and check that the other wiring of the baffle flowmeter test device is intact; S2, power-on initialization, the controller checks the water inlet electric valve (M1), the first standard flow meter (Q1), the second standard flow meter (Q2), the water outlet electric valve (M2), the self-cleaning motor (M4), the state of the baffle flow meter to be tested (Qx), and whether the signal acquisition is normal; if the detection signal channel is normal, it jumps to the test data acquisition module and the water supply pump automatic control module, otherwise it jumps to the end test module and reports the unavailable signal of the baffle flow meter test device; S3, the control function of the water supply pump automatic control module is as follows: when the water level of the high-level water tank (B2) is lower than the position of the low-level water switch (L2), the low-level water switch (L2) is activated, and the water supply pump (M3) starts to run, pumping the water from the low-level water tank (B1) to the high-level water tank (B2); when the water level of the water tower is higher than the position of the high-level water switch (L1), the high-level water switch (L1) is activated, and the water supply pump (M3) stops running, and the water supply stops, and this cycle continues; S4, the test data acquisition module records that when the water inlet electric valve (M1) and the water outlet electric valve (M2) are fully closed, the flow values ​​of the damper flow meter (Qx) to be tested, the first standard flow meter (Q1), and the second standard flow meter (Q2) at that moment are recorded as QX_0, Q1_0, and Q2_0 respectively; after the data is recorded, the water inlet electric valve (M1) and the water outlet electric valve (M2) are opened to 25% of the valve opening, and the flow values ​​of the damper flow meter (Qx) to be tested, the first standard flow meter (Q1), and the second standard flow meter (Q2) at that moment are recorded as QX_1, Q1_1, and Q2_1 respectively; after the data is recorded, the water inlet electric valve (M1) and the water outlet electric valve (M2) are opened to 50% of the valve opening, and the flow values ​​of the damper flow meter (Qx) to be tested at that moment are recorded as QX_1, Q1_1, and Q2_1 respectively. After the data are recorded, the water inlet electric valve (M1) and the water outlet electric valve (M2) are opened to 75% of the valve opening, and the flow values ​​of the baffle flowmeter (Qx) to be tested, the first standard flowmeter (Q1), and the second standard flowmeter (Q2) are recorded as QX_3, Q1_3, and Q2_3, respectively; after the data are recorded, the water inlet electric valve (M1) and the water outlet electric valve (M2) are opened to 100% of the valve opening, and the flow values ​​of the baffle flowmeter (Qx) to be tested, the first standard flowmeter (Q1), and the second standard flowmeter (Q2) are recorded as QX_4, Q1_4, and Q2_4, respectively; After the test data module completes data collection, it jumps to the test data calculation module; S5: a test data calculation module, calculating whether the flow value QX of the baffle flow meter (Qx) to be tested at each moment in step S4 is between α times and β which is half of the sum of the flow values ​​Q1 and Q2 of the first standard flow meter (Q1) and the second standard flow meter (Q2), that is, α(Q1+Q2) / 2≤QX≤β(Q1+Q2) / 2; If the flow calculation values ​​at each moment meet the above conditions, the flow test data of the baffle flowmeter (Qx) to be tested is qualified and displayed in green, and jumps to the end test module, otherwise jumps to the self-cleaning function motor module; S6: Self-cleaning function motor module, the self-cleaning motor (M4) starts running, and the dirt inside the baffle flow meter being calibrated is removed by the self-cleaning motor (M4) rotating back and forth in the forward and reverse directions. When the self-cleaning motor (M4) rotates forward, it drives the self-cleaning handle to swing. When it swings to the upper limit detector (SQ2) and the motor stops (M4) and rotates forward. Then, when the self-cleaning motor (M4) rotates reversely, it drives the self-cleaning handle to swing reversely. When it swings to the lower limit detector (SQ1) and the motor stops (M4) and reverses. Run 2-3 strokes according to the above method. After cleaning is completed, the self-cleaning motor (M4) stops running. At this time, jump to step S4 and repeat step S4 and step S5 once. If the flow calculation values ​​at each moment in step S5 meet the flow-related test conditions, the flow test data of the baffle flow meter (Qx) to be tested is qualified and displayed in green, and jump to the end test module at the same time. Otherwise, jump to the end test module, and report that the flow verification data of the baffle flow meter (Qx) to be tested is unqualified, and it is recommended to replace the flow meter.

9. A method for testing a baffle flowmeter with a self-cleaning control function according to claim 8, characterized in that: In step S5, the value of α is 0.95, and the value of β is 1.

05.

10. A method for testing a baffle flowmeter with a self-cleaning control function according to claim 8, characterized in that: In step S5, When the valve opening of the water inlet electric valve (M1) and the water outlet electric valve (M2) is 0%, it is determined whether the flow value QX_0 of the damper flow meter (Qx) to be tested satisfies α(Q1_0+Q2_0) / 2≤QX_0≤β(Q1_0+Q2_0) / 2. If so, the flow meter at the measuring point is tested and qualified; When the valve opening of the water inlet electric valve (M1) and the water outlet electric valve (M2) is 25%, it is determined whether the flow value QX_1 of the damper flow meter (Qx) to be tested satisfies α(Q1_1+Q2_1) / 2≤QX_1≤β(Q1_1+Q2_1) / 2. If so, the flow meter at the measuring point is qualified; When the valve opening of the water inlet electric valve M1 and the water outlet electric valve M2 is 50%, determine whether the flow value QX_2 of the damper flow meter (Qx) to be tested satisfies α(Q1_2+Q2_2) / 2≤QX_2≤β(Q1_2+Q2_2) / 2. If it satisfies, the flow meter at the measuring point is tested and qualified; When the valve opening of the water inlet electric valve (M1) and the water outlet electric valve (M2) is 75%, it is determined whether the flow value QX_3 of the damper flow meter (Qx) to be tested satisfies α(Q1_3+Q2_3) / 2≤QX_3≤β(Q1_3+Q2_3) / 2. If it satisfies, the flow meter at the measuring point is tested and qualified; When the valve opening of the water inlet electric valve (M1) and the water outlet electric valve (M2) is 100%, it is determined whether the flow value QX_4 of the damper flow meter (Qx) to be tested satisfies α(Q1_4+Q2_4) / 2≤QX_4≤β(Q1_4+Q2_4) / 2. If so, the flow meter at the measuring point is qualified; When the above conditions are met in all five cases, the flow test of the baffle flowmeter (Qx) to be tested is qualified, and the module jumps to the end test module; if the above conditions are not met in any of the five cases, the module jumps to the self-cleaning function motor module.

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