Comparison detection skid-mounted device for small-caliber flow meter

Abstract

The utility model discloses a skid-mounted device for comparison detection of a small-caliber flowmeter, and relates to the technical field of flowmeter verification. The device comprises a water tank, a water pump, a surge tank, a temperature transmitter, a pressure transmitter, a first standard meter, a second standard meter, a regulating valve, an electric cabinet, a measuring pipeline, a detected meter and a skid-mounted frame. According to the utility model, the bulky and heavy liquid standard device is compressed in a smaller space through structural optimization design, so that the lightweight, flexibility and convenience of the detection skid-mounted device are finally realized, the verification and calibration work can be carried out on site accessories, the detection cost is reduced, the detection skid-mounted device is movable, the vehicle transfer is convenient, and the detection and calibration efficiency is improved. The detection skid-mounted device is simple in structure and convenient to operate, calibration and calibration of the flowmeter which is installed in a horizontal pipeline mode and has the caliber DN of 10-25 and below the level 1.0 are achieved, low power consumption is achieved through the detection skid-mounted device, the overall power consumption is smaller than or equal to 1.5 kw, the requirement for an air source is omitted by adopting the micro manual meter clamping device, and the device configuration requirement is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meter calibration, in particular to a skid-mounted device for comparative detection of small-caliber flow meters. Background Art

[0002] Flowmeter is a commonly used measuring instrument in industrial production, used to measure the flow of liquids, gases, etc. in pipelines. Due to production needs, different specifications and types of flowmeters are often installed on different pipelines. However, there are differences in the accuracy and error of these flowmeters. Therefore, pipeline flowmeter comparison and testing is very important. By comparing and testing the installed flowmeters, equipment problems can be discovered in time and the accuracy can be adjusted, thus preventing quality problems and economic losses caused by flowmeter errors in the production process.

[0003] Traditional liquid flow standard devices are mostly built in large spaces and are fixed and cannot be moved. With the widespread promotion and application of flow meters, the workload of flow meter testing is increasing. In particular, the proportion of flow meters with a diameter of ≤DN25mm (one inch) is even greater. However, traditional liquid flow meter standard devices are mostly built in laboratories and are bulky. A large number of flow meters to be tested need to be disassembled and transported to the laboratory for verification or calibration, resulting in low testing efficiency and a large workload.

[0004] At the same time, the laboratory equipment has high requirements for supporting facilities, and the use of pneumatic clamps to clamp instruments has the disadvantage of being bulky and heavy. Utility Model Content

[0005] In order to solve the above problems, the purpose of the present invention is to provide a skid-mounted device for comparative detection of small-caliber flow meters.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a small-caliber flowmeter comparison detection skid-mounted device, the detection skid-mounted device includes a water tank, a water pump, a pressure regulating tank, a temperature transmitter, a pressure transmitter, a No. 1 standard meter, a No. 2 standard meter, a regulating valve, an electric control box, a measuring pipeline, a meter to be tested and a skid-mounted frame;

[0007] The water tank, water pump, pressure regulating tank, temperature transmitter, pressure transmitter, No. 1 standard meter, No. 2 standard meter, regulating valve, electric control box, measuring pipeline and the meter to be tested are assembled on the skid-mounted frame;

[0008] The water tank, water pump, pressure stabilizing tank, temperature transmitter, pressure transmitter, No. 1 standard meter, No. 2 standard meter, regulating valve and the meter to be tested are connected through a measuring pipeline.

[0009] Preferably, the measuring pipeline includes a front straight pipe section and a rear straight pipe section, the front straight pipe section is arranged at one end of the meter being tested, the rear straight pipe section is arranged at the other end of the meter being tested, and the rear straight pipe section is equipped with a miniature manual meter clamp.

[0010] Preferably, the inner wall of the surge tank is equipped with a first partition.

[0011] Preferably, the inner wall of the water tank is equipped with two second partitions.

[0012] Preferably, a reference time base circuit and a signal acquisition system are provided in the electric control box.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In this utility model, the bulky liquid standard device is compressed into a smaller space through structural optimization design, ultimately achieving lightweight, flexible and convenient detection skid-mounted device, and ultimately allowing verification and calibration work to be carried out on-site, reducing detection costs;

[0015] 2. In this utility model, the detection skid-mounted device is movable, which is convenient for vehicle transportation and can realize the verification and calibration of flow meters installed in horizontal pipelines with a diameter of DN (10-25) and below 1.0 level;

[0016] 3. In this utility model, the detection skid-mounted device achieves low power consumption, with the overall power consumption ≤1.5kw. The use of a miniature manual meter clamp eliminates the need for an air source and reduces device configuration requirements;

[0017] 4. In the present invention, the detection skid-mounted device can transport the experimental equipment to the vicinity of the detection site, shortening the torsion transportation time, improving the detection efficiency, and reducing the detection workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is the main view of the skid-mounted device for comparative detection of small-caliber flow meters in the utility model.

[0020] Figure 2 This is the upper level plan layout of the skid-mounted device for comparative detection of small-caliber flowmeters in this utility model.

[0021] Figure 3This is the lower level plan layout of the skid-mounted device for comparative detection of small-caliber flowmeters in this utility model.

[0022] Figure 4 This is a top view of the miniature manual watch clamp of the utility model.

[0023] Figure 5 This is a schematic diagram of the working principle of the pressure-sustaining tank of the utility model.

[0024] Figure 6 This is the working principle diagram of the water tank of this utility model.

[0025] Figure 7 This is a schematic diagram of the structure of the electric control cabinet of the utility model.

[0026] Figure 8 This is the primary high-voltage principle diagram of the electric control cabinet of this utility model.

[0027] Figure 9 This is the secondary weak current principle diagram of the electric control cabinet of this utility model.

[0028] In the figure: 1. Water tank; 2. Water pump; 3. Pressure regulating tank; 4. Temperature transmitter; 5. Pressure transmitter; 6. Standard gauge No. 1; 7. Standard gauge No. 2; 8. Miniature manual gauge clamp; 9. Control valve; 10. Electric control box; 11. Pipe clamp; 12. First partition; 13. Second partition; 14. Clamp joint; 15. Gooseneck pipe; 20. Measuring pipeline; 21. Front straight pipe section; 22. Rear straight pipe section; 30. Tested meter; 40. Skid-mounted frame; 100. Reference time base circuit; 200. Signal acquisition system. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example: Figure 1-9 As shown, the utility model provides a small-caliber flowmeter comparison detection skid-mounted device, which includes a water tank 1, a water pump 2, a pressure-sustaining tank 3, a temperature transmitter 4, a pressure transmitter 5, a No. 1 standard meter 6, a No. 2 standard meter 7, a regulating valve 9, an electric control box 10, a measuring pipeline 20, a meter to be tested 30, and a skid-mounted frame 40;

[0031] The electric control box 10 is provided with a reference time base circuit 100 and a signal acquisition system 200;

[0032] The signal acquisition system 200 is a PLC controller, which uses the control system software to simultaneously collect the flow values ​​of the No. 1 standard meter 6, the No. 2 standard meter 7 and the measured meter, and compares them to calculate the deviation value of the flow meter;

[0033] The water tank 1, water pump 2, pressure regulating tank 3, temperature transmitter 4, pressure transmitter 5, No. 1 standard meter 6, No. 2 standard meter 7, regulating valve 9, electric control box 10, measuring pipeline 20 and the meter under test 30 are assembled on the skid-mounted frame 40. The measuring pipeline 20 includes a front straight pipe section 21 and a rear straight pipe section 22. The front straight pipe section 21 is arranged at one end of the meter under test 30, and the rear straight pipe section 22 is arranged at the other end of the meter under test 30. 20 times the length of the DN25mm diameter is used as the front straight pipe section 21 of the flowmeter, and the rear straight pipe section 22 is designed according to the length of the flowmeter ≥5DN, so that the flow field in the measuring pipeline 20 is fully diverged, ensuring the stability and reliability of the flowmeter under test. The section 22 is equipped with a micro manual meter clamp 8. By setting up the micro manual meter clamp 8, the micro manual meter clamp 8 abandons the large and bulky structure of the traditional meter clamp, making it easy and convenient to load and unload the spare flow meter of the detection skid-mounted device. The inner wall of the surge tank 3 is equipped with a first partition 12, and the inner wall of the water tank 1 is equipped with two second partitions 13. The water pump 2 and the surge tank 3 in the detection skid-mounted device constitute a constant pressure water source. The surge tank 3 adopts a high-inlet and low-outlet structure. The first partition 12 in the surge tank 3 divides the incoming water flow into upper and lower channels. The bubbles in the water float up and enter the gas phase volume, and the liquid phase sinks and concentrates at the bottom. This avoids the bubble content in the water, which leads to the gas-liquid two-phase entering. The measuring pipeline 20 on the surface affects the measurement results. Standard meter No. 1 6 is a DN25-level electromagnetic flowmeter, and standard meter No. 2 7 is a DN2.0-level electromagnetic flowmeter. Gooseneck tubes 15 are set at the ends of standard meter No. 1 and standard meter No. 2 to ensure that the measuring pipeline 20 is full of pipes. Standard meter No. 1 6 and standard meter No. 2 7 meet the coverage of the full flow range. Standard meter No. 1 6, standard meter No. 2 7 and the inspected meter 30 use high-precision electromagnetic flowmeters. The values ​​of the high-precision electromagnetic flowmeter and the inspected electromagnetic flowmeter are compared and calibrated. A pipe clamp 11 is installed between the skid-mounted frame 40 and the measuring pipeline 20. By setting the pipe clamp 11, the pipe clamp 11 can 0 is fixed on the skid-mounted frame 40, and a clamp joint 14 is assembled on the measuring pipeline 20. By setting the clamp joint 14, the clamp joint 14 is used to connect the measuring pipeline 20, mainly at the two ends of the regulating valve 9, the inlet and outlet positions of the water pump 2, and the two ends of the miniature manual meter clamp 8. The measuring pipeline 20 with a diameter of DN25mm or less can be quickly replaced directly through the clamp joint 14. The rear straight pipe section 22 can also be replaced by the pipe section in front of the miniature manual meter clamp 8, so that the detection range of the detection skid-mounted device is expanded. The regulating valve 9 in front of the measuring pipeline 20 is called a stop valve, which plays a role of on-off, and plays a selection role at the front end of the No. 1 standard meter 6 and the No. 2 standard meter 7;

[0034] The water tank 1 , the water pump 2 , the pressure stabilizing tank 3 , the temperature transmitter 4 , the pressure transmitter 5 , the No. 1 standard meter 6 , the No. 2 standard meter 7 , the regulating valve 9 and the meter under test 30 are connected through the measuring pipeline 20 .

[0035] Working principle: When using this detection skid-mounted device, the water in the water tank 1 flows through the measuring pipeline 20 and enters the manifold of the measuring pipeline 20. The upper end of the manifold is connected to the regulating valve 9 in front of the No. 1 standard meter 6 and the No. 2 standard meter 7 through a 90° elbow. The two regulating valves 9 are respectively selected for two electromagnetic flow meters of different sizes to meet the distance of 20DN in front and 5DN in back of the front straight pipe section 21 and the rear straight pipe section 22 of the No. 1 standard meter 6 and the No. 2 standard meter 7. The regulating valve 9 is installed behind the rear straight pipe section 22 of the No. 1 standard meter 6 and the No. 2 standard meter 7. The gooseneck pipe 15 drain outlet is installed behind the regulating valve 9 to ensure that the No. 1 standard meter 6 and the No. 2 standard meter 7 are full.

[0036] Finally, the water flows back to the water tank 1, forming a circulation loop. As the water flow hits the water surface, a large number of bubbles are formed. The two second partitions 13 provided in the water tank 1 form two areas in the water tank 1: a sedimentation area and an overflow bubble area. Solid impurities and bubbles are separated and no longer sucked into the water pump 2, thereby achieving bubble control.

[0037] The water flow forms a continuous circulation loop, and the water flow rate flowing through the inspected meter 30 is the same as the water flow rate of the No. 1 standard meter 6 and the No. 2 standard meter 7;

[0038] Through the reference time base circuit 100 and the signal acquisition system 200 equipped in the electric control box 10, the control system software simultaneously collects the flow values ​​of the No. 1 standard meter 6, the No. 2 standard meter 7 and the meter under test 30 for comparison, thereby calculating the deviation value of the flow meter.

[0039] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. Small-caliber flowmeter comparison detection skid-mounted device, characterized by: The detection skid-mounted device comprises a water tank (1), a water pump (2), a pressure regulating tank (3), a temperature transmitter (4), a pressure transmitter (5), a No. 1 standard gauge (6), a No. 2 standard gauge (7), a regulating valve (9), an electric control box (10), a measuring pipeline (20) and a skid-mounted frame (40); The water tank (1), water pump (2), pressure regulating tank (3), temperature transmitter (4), pressure transmitter (5), No. 1 standard meter (6), No. 2 standard meter (7), regulating valve (9), electric control box (10) and measuring pipeline (20) are assembled on the skid-mounted frame (40); The water tank (1), water pump (2), pressure stabilizing tank (3), temperature transmitter (4), pressure transmitter (5), No. 1 standard meter (6), No. 2 standard meter (7) and regulating valve (9) are connected via a measuring pipeline (20).

2. The small-caliber flowmeter comparison detection skid-mounted device according to claim 1, characterized in that: The measuring pipeline (20) comprises a front straight pipe section (21) and a rear straight pipe section (22); the front straight pipe section (21) is arranged at one end of the meter to be tested (30); the rear straight pipe section (22) is arranged at the other end of the meter to be tested (30); and a miniature manual meter clamp (8) is mounted on the rear straight pipe section (22).

3. The small-caliber flowmeter comparison detection skid-mounted device according to claim 1, characterized in that: A pipe clamp (11) is installed between the skid-mounted frame (40) and the measuring pipeline (20).

4. The small-caliber flowmeter comparison detection skid-mounted device according to claim 1, characterized in that: The inner wall of the pressure stabilizing tank (3) is equipped with a first partition (12).

5. The small-caliber flowmeter comparison detection skid-mounted device according to claim 1, characterized in that: The inner wall of the water tank (1) is equipped with two second partitions (13).

6. The small-caliber flowmeter comparison detection skid-mounted device according to claim 1, characterized in that: The measuring pipeline (20) is equipped with a clamp joint (14).

7. The small-caliber flowmeter comparison detection skid-mounted device according to claim 1, characterized in that: The electric control box (10) is provided with a reference time base circuit (100) and a signal acquisition system (200).

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