Helical vane type water meter calibration device

Abstract

The utility model relates to the technical field of water meter calibration, in particular to a helical vane type water meter calibration device. The helical vane type water meter calibration device comprises a variable frequency pump, the variable frequency pump is connected with a rectifier through a filter, the rectifier is connected with a Honeywell mass flow meter through an energy storage tank, and the Honeywell mass flow meter is connected with a primary helical vane type water meter through a Honeywell mass flow meter outlet pipeline. According to the device, the Honeywell mass flow meter is arranged in front of the helical vane type water meter, so that the calibration accuracy of the helical vane type water meter is greatly improved, the blank that whether metering is accurate or not cannot be calibrated by the conventional helical vane type water meter is solved, and the material cost is saved; according to the spiral vane type water meter, the filter, the rotary scraping plate and the medicine dispensing tank are used in cooperation, when the filter is blocked, impurities can be dissolved and scraped off through the rotary scraping plate and medicine liquid in the medicine dispensing tank, and the risk that the spiral vane type water meter is blocked is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water meter calibration, in particular to a propeller-type water meter calibration device. Background Art

[0002] In equipment production, accurate water measurement is crucial for the rational allocation of water resources, cost accounting, and management decisions. Propeller-type water meters, used to measure the volume flow of media within pipelines, are complex in structure and widely used. Calibration is difficult, resulting in inaccurate measurement and calibration.

[0003] In the actual use of propeller-type water meters, the water contains a lot of alkaline impurities, which often leads to blockage of the propeller-type water meters. In addition, the water in the pipeline also has problems such as uneven water flow and pressure fluctuations, which seriously affect the stability of the supply. Utility Model Content

[0004] In view of the above deficiencies in the existing technology, the purpose of the present invention is to provide a propeller water meter calibration device. By arranging a Honeywell mass flowmeter in front of the propeller water meter, the accuracy of the propeller water meter calibration is greatly improved, which solves the problem that the propeller water meter could not be calibrated to determine whether the measurement is accurate, thereby saving material costs; through the coordinated use of the filter, the rotating scraper and the dispensing tank, when the filter is blocked, the impurities can be dissolved and scraped off by the rotating scraper and the liquid medicine in the dispensing tank, which greatly reduces the risk of blockage of the propeller water meter; through the coordinated use of the rectifier and the energy storage tank, the flow velocity distribution of the water flow is made more uniform, providing stable water flow conditions for subsequent equipment.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The propeller water meter calibration device includes a variable frequency pump, which is connected to a rectifier through a filter. The rectifier is connected to a Honeywell mass flowmeter through an energy storage tank. The Honeywell mass flowmeter is connected to a first-stage propeller water meter through a Honeywell mass flowmeter outlet pipe.

[0007] The filter removes impurities from the water, preventing them from entering subsequent equipment. The rectifier straightens the filtered water, making the flow rate more uniform and providing stable flow conditions for subsequent equipment. After the relatively pure filtered water passes through the rectifier, it can better achieve its rectifying effect, adjusting any turbulent or uneven flow rate to a near-ideal laminar flow, ensuring the normal operation of subsequent equipment.

[0008] A filter plate is provided inside the filter, a rotating scraper is provided below the filter plate, and the upper edge of the rotating scraper is tangent to the lower edge of the filter plate.

[0009] A filter inlet pipe is connected between the variable frequency pump and the filter, and the connection between the filter inlet pipe and the filter is located below the filter plate.

[0010] Accumulator tanks are primarily used to absorb energy fluctuations in water flow, stabilizing its pressure and flow rate. After the rectified water enters the accumulator tank, it buffers and regulates the energy, ensuring a more stable flow to subsequent equipment, such as Honeywell mass flowmeters and propeller-type water meters, minimizing the impact of pressure or flow fluctuations on the accuracy of these devices.

[0011] The variable frequency pump is connected to the filter through the medicine dispensing tank. A medicine dispensing tank inlet pipeline is provided between the variable frequency pump and the medicine dispensing tank. The connection between the medicine dispensing tank and the filter is located above the filter plate.

[0012] When the filter efficiency decreases, open the valve on the pipe entering the dispensing tank in turn, close the valve on the pipe entering the filter, and introduce water into the dispensing tank. After the dispensing is completed, it enters the filter to backwash the filter plate. At the same time, the rotating scraper starts working.

[0013] The filter is connected to an impurity storage tank through a pipeline, and the connection between the impurity storage tank and the filter is located below the filter plate.

[0014] An energy storage tank inlet pipe is provided between the rectifier and the energy storage tank. The energy storage tank inlet pipe is connected to the inlet of the heat exchanger through the heat exchanger inlet pipe, and the outlet of the heat exchanger is connected to the energy storage tank inlet pipe through a pipe.

[0015] The Honeywell mass flowmeter is connected to a second-stage propeller water meter and a third-stage propeller water meter, and the first-stage propeller water meter, the second-stage propeller water meter and the third-stage propeller water meter are connected in parallel.

[0016] Different types of propeller water meters and mass flow meters are installed in the four-circulation water supply line for meter calibration. There are currently 25 propeller water meters installed in the circulating water plants of the water supply and drainage workshop, with a total of 6 types of models including DN50, DN80, DN100, DN150, DN200 and DN250. They are currently calibrated using Honeywell mass flow meters with a certified accuracy of 0.2%, and the calibration cycle is one year.

[0017] The working principle of this utility model is:

[0018] Industrial water enters the filter via a variable frequency pump, then passes through a rectifier and into an accumulator tank. It then passes through a Honeywell mass flowmeter to calibrate the first-stage, second-stage, and third-stage propeller water meters. If the water temperature fluctuates significantly, the industrial water entering the accumulator tank is tempered by a heat exchanger to ensure calibration accuracy. If the filter efficiency decreases, the valves on the pipes inlet to the dispensing tank are opened, and then closed, allowing water to enter the dispensing tank. After dispensing, the water enters the filter to backwash the filter plates while the rotating scraper begins operating. The accumulator tank primarily absorbs energy fluctuations in the water flow, stabilizing its pressure and flow rate. After the rectified water enters the accumulator tank, it buffers and regulates the energy, ensuring a more stable flow to downstream equipment, such as the Honeywell mass flowmeter and propeller water meter, minimizing the impact of pressure or flow fluctuations on these devices' metering accuracy.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The utility model adopts the propeller-type water meter calibration device, and by arranging a Honeywell mass flowmeter in front of the propeller-type water meter, the calibration accuracy of the propeller-type water meter is greatly improved, which solves the gap that the propeller-type water meter could not be calibrated to determine whether the measurement is accurate, thereby saving material costs; by using the filter, the rotating scraper and the dispensing tank in conjunction with each other, when the filter is blocked, the impurities can be dissolved and scraped off by the rotating scraper and the liquid medicine in the dispensing tank, which greatly reduces the risk of blockage of the propeller-type water meter; by using the rectifier and the energy storage tank in conjunction with each other, the flow velocity distribution of the water flow is made more uniform, providing stable water flow conditions for subsequent equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the propeller-type water meter calibration device of the utility model;

[0022] In the figure: 1. Variable frequency pump; 2. Filter; 3. Rectifier; 4. Accumulator tank; 5. Honeywell mass flowmeter; 6. First-stage propeller water meter; 7. Second-stage propeller water meter; 8. Third-stage propeller water meter; 9. Dispensing tank; 10. Impurity storage tank; 11. Heat exchanger; 12. Filter plate; 13. Rotating scraper; 14. Heat exchanger inlet pipe; 15. Accumulator tank inlet pipe; 16. Filter inlet pipe; 17. Dispensing tank inlet pipe; 18. Honeywell mass flowmeter outlet pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings.

[0024] Example 1

[0025] like Figure 1 As shown, the propeller water meter calibration device includes a variable frequency pump 1, which is connected to a rectifier 3 via a filter 2. The rectifier 3 is connected to a Honeywell mass flowmeter 5 via an energy storage tank 4. The Honeywell mass flowmeter 5 is connected to a first-stage propeller water meter 6 via a Honeywell mass flowmeter outlet pipe 18. The filter 2 filters impurities from the water to prevent them from entering downstream equipment. The rectifier 3 straightens the filtered water flow, making the flow velocity distribution more uniform and providing stable water flow conditions for downstream equipment. The filter 2 is equipped with a filter plate 12. Below the filter plate 12 is a rotating scraper 13, with the upper edge of the scraper 13 tangent to the lower edge of the filter plate 12. A filter inlet pipe 16 connects the variable frequency pump 1 and the filter 2, with the connection between the filter inlet pipe 16 and the filter 2 located below the filter plate 12. The variable frequency pump 1 is connected to the filter 2 via the dispensing tank 9. A dispensing tank inlet pipe 17 is provided between the variable frequency pump 1 and the dispensing tank 9. The connection between the dispensing tank 9 and the filter 2 is located above the filter plate 12. The filter 2 is connected to the impurity storage tank 10 via a pipe. The connection between the impurity storage tank 10 and the filter 2 is located below the filter plate 12. An accumulator tank inlet pipe 15 is provided between the rectifier 3 and the accumulator tank 4. This accumulator tank inlet pipe 15 is connected to the inlet of the heat exchanger 11 via the heat exchanger inlet pipe 14. The outlet of the heat exchanger 11 is also connected to the accumulator tank inlet pipe 15 via a pipe. A second-stage propeller water meter 7 and a third-stage propeller water meter 8 are connected to the Honeywell mass flowmeter 5. The first-stage propeller water meter 6, the second-stage propeller water meter 7, and the third-stage propeller water meter 8 are connected in parallel.

[0026] The above-mentioned propeller-type water meter calibration device, when in operation, comprises the following steps:

[0027] (1) Industrial water enters the filter 2 through the variable frequency pump 1, and then is rectified by the rectifier 3 and enters the energy storage tank 4. The first-stage propeller water meter 6, the second-stage propeller water meter 7, and the third-stage propeller water meter 8 are calibrated in sequence through the Honeywell mass flow meter 5; (2) When the water temperature changes greatly, the industrial water entering the energy storage tank 4 is temperature-controlled by the heat exchanger 11 to ensure the accuracy of the calibration; (3) When the efficiency of the filter 2 decreases, the valve on the pipe 17 entering the dispensing tank is opened in sequence, and the valve on the pipe 16 entering the filter is closed, and the water is introduced into the dispensing tank 9. After the dispensing is completed, the water enters the filter 2 and backwashes the filter plate 12. At the same time, the rotating scraper 13 starts working.

Claims

1. A propeller-type water meter calibration device, characterized in that: The invention comprises a variable frequency pump (1), wherein the variable frequency pump (1) is connected to a rectifier (3) through a filter (2), the rectifier (3) is connected to a Honeywell mass flow meter (5) through an energy storage tank (4), and the Honeywell mass flow meter (5) is connected to a first-stage propeller-type water meter (6) through a Honeywell mass flow meter outlet pipe (18).

2. The propeller-type water meter calibration device according to claim 1, characterized in that: A filter plate (12) is provided inside the filter (2), and a rotating scraper (13) is provided below the filter plate (12). The upper edge of the rotating scraper (13) is tangent to the lower edge of the filter plate (12).

3. The propeller-type water meter calibration device according to claim 2, characterized in that: A filter inlet pipe (16) is connected between the variable frequency pump (1) and the filter (2), and the connection between the filter inlet pipe (16) and the filter (2) is located below the filter plate (12).

4. The propeller-type water meter calibration device according to claim 2, characterized in that: The variable frequency pump (1) is connected to the filter (2) via the dispensing tank (9). A dispensing tank inlet pipe (17) is provided between the variable frequency pump (1) and the dispensing tank (9). The connection between the dispensing tank (9) and the filter (2) is located above the filter plate (12).

5. The propeller-type water meter calibration device according to claim 2, characterized in that: The filter (2) is connected to an impurity storage tank (10) via a pipeline, and the connection between the impurity storage tank (10) and the filter (2) is located below the filter plate (12).

6. The propeller-type water meter calibration device according to claim 1, characterized in that: An energy storage tank inlet pipe (15) is provided between the rectifier (3) and the energy storage tank (4). The energy storage tank inlet pipe (15) is connected to the inlet of the heat exchanger (11) through the heat exchanger inlet pipe (14), and the outlet of the heat exchanger (11) is connected to the energy storage tank inlet pipe (15) through a pipe.

7. The propeller-type water meter calibration device according to claim 1, characterized in that: The Honeywell mass flowmeter (5) is connected to a second-stage propeller-type water meter (7) and a third-stage propeller-type water meter (8), and the first-stage propeller-type water meter (6), the second-stage propeller-type water meter (7), and the third-stage propeller-type water meter (8) are connected in parallel.

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