Calibration device for small-flow volume flow meter

Abstract

The utility model discloses a small-flow volume flowmeter calibration device which comprises a constant-temperature box, a water tank is arranged in the constant-temperature box, a water pump is fixedly connected to the top of the water tank, a feeding pipe is clamped to the water outlet end of the water pump, a first branch pipe is clamped to one end of the feeding pipe, and a second branch pipe is clamped to the other end of the feeding pipe. The upper flange of the first branch pipe is connected with a flowmeter to be calibrated; a heating pipe is fixedly mounted on the bottom surface of the constant temperature box, a heat conducting plate is fixedly mounted at the top of the heating pipe, a first mounting frame is fixedly mounted at the top of the heat conducting plate, a water tank is fixedly mounted at the top of the first mounting frame, a mounting groove is formed in the top of the constant temperature box, and a second mounting frame is fixedly mounted in the mounting groove; according to the flow meter calibration device, the constant temperature box, the heating pipe, the heat conduction plate, the fan, fan blades and other assemblies are arranged and used in cooperation, the temperature of the calibration environment can be reasonably regulated and controlled, and therefore the calibration device can calibrate the flow meter more accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration experiments, in particular to a calibration device for a small flow volume flowmeter. Background Art

[0002] Measurement is the eye of industrial production. Flow measurement is one of the components of measurement science and technology, and it is closely related to the national economy, national defense construction, and scientific research. Doing this work well plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. Especially in today's era of energy crisis and increasing automation of industrial production, the status and role of flow meters in the national economy are more obvious; in actual use, if the temperature, pressure, properties of the medium and other conditions are different from the calibration scale, or the flow meter is worn out after long-term use, or a non-standard flow meter is manufactured by itself, it is necessary to calibrate the flow meter and re-determine its flow coefficient or calibration curve.

[0003] However, most of the existing calibration devices for small volume flowmeters do not have the function of adjusting temperature. During the calibration process of the flowmeter, temperature is an important parameter because changes in temperature will cause changes in the density and viscosity of the fluid, thereby affecting the measurement results of the flowmeter. Utility Model Content

[0004] The purpose of the utility model is to provide a calibration device for a small flow volume flow meter. By setting up a constant temperature box, a heating tube, a heat conduction plate, a fan and fan blades and other components to cooperate with each other, the temperature of the calibration environment can be reasonably adjusted to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small-flow volume flowmeter calibration device, comprising a constant temperature box, a water tank is provided inside the constant temperature box, a water pump is fixedly connected to the top of the water tank, a feed pipe is clamped at the water outlet of the water pump, a first branch pipe is clamped at one end of the feed pipe, a flowmeter to be calibrated is flange-connected to the first branch pipe; a heating pipe is fixedly installed on the bottom surface of the constant temperature box, a heat conducting plate is fixedly installed on the top of the heating pipe, a first mounting frame is fixedly installed on the top of the heat conducting plate, a water tank is fixedly installed on the top of the first mounting frame, a mounting groove is opened on the top of the constant temperature box, a second mounting frame is fixedly installed inside the mounting groove, a fan is fixedly installed inside the second mounting frame, and the output end of the fan is drivingly connected to fan blades.

[0006] Preferably, a pressure sensor is fixedly installed on the top of one end of the first branch pipe, one end of the first branch pipe is fixedly connected to the second branch pipe, a standard flow meter is flange-connected to the second branch pipe, and one end of the second branch pipe is fixedly connected to a drain pipe.

[0007] Preferably, one end of the drain pipe is fixedly connected to a three-way joint, one end of the three-way joint is fixedly connected to a return pipe, and the other end of the three-way joint is fixedly connected to a sewage pipe.

[0008] Preferably, a first valve port is fixedly installed at one end of the return pipe, and the other end of the return pipe is fixedly connected to the inside of the water tank. A second valve port is fixedly installed at one end of the sewage pipe, and the other end of the sewage pipe passes through the thermostatic box and is fixedly connected to a sewage tank. The sewage tank is fixedly installed at the bottom of one side of the thermostatic box.

[0009] Preferably, a door is movably mounted on one end of the front of the thermostatic box through a hinge, a controller is fixedly mounted on the front of the door, a temperature sensor is fixedly mounted on one inner wall of the thermostatic box, and the temperature sensor is connected to the controller through a wire.

[0010] Preferably, both ends of the top of the thermostatic box are provided with card slots, the interior of the card slots is card-engaged with card blocks, and a filter plate is fixedly mounted on the top of the card block.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model can reasonably control the temperature of the calibration environment by setting up a constant temperature box, a heating tube, a heat conduction plate, a fan and fan blades and other components for use in coordination with each other, so that the calibration device can calibrate the flow meter more accurately and reduce the adverse effects of external factors on the calibration results. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the thermostat of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the thermostat of the utility model;

[0015] Figure 3 This is the cutaway structure of the heat conducting plate of the utility model;

[0016] Figure 4 It is a schematic diagram of the partial explosion structure of the thermostatic box of the utility model.

[0017] In the figure: 1. Constant temperature box; 2. Water tank; 3. Water pump; 4. Feed pipe; 5. First branch pipe; 6. Flow meter to be calibrated; 7. Heating pipe; 8. Heat transfer plate; 9. First mounting bracket; 10. Second mounting bracket; 11. Fan; 12. Fan blade; 13. Second branch pipe; 14. Standard flow meter; 15. Drain pipe; 16. Three-way joint; 17. Return pipe; 18. Drain pipe; 19. First valve port; 20. Second valve port; 21. Sewage tank; 22. Box door; 23. Controller; 24. Temperature sensor; 25. Card slot; 26. Card block; 27. Filter plate; 28. Pressure sensor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figures 1 to 4 The utility model provides a technical solution: a calibration device for a small flow volume flowmeter, including a constant temperature box 1, which is used to install a heating tube 7 and a fan 11, and can adjust the temperature of the calibration environment in cooperation with components such as a temperature sensor 24 to improve the calibration accuracy. The bottom surface of the constant temperature box 1 is fixedly installed with a heating tube 7, which is convenient for adjusting the temperature in the box. The top of the heating tube 7 is fixedly installed with a heat conducting plate 8, which is convenient for dispersing heat to the inside of the box. The top of the heat conducting plate 8 is fixedly installed with a first mounting bracket 9, which is convenient for installing a water tank 2 so that it does not directly contact the heat conducting plate 8. The top of the first mounting bracket 9 is fixedly installed with a water tank 2, which is used to transport water into the pipeline, so as to test whether the value of the flowmeter 6 to be calibrated is There is a deviation. A mounting groove is provided at the top of the thermostatic box 1 for mounting the fan 11. A second mounting frame 10 is fixedly installed inside the mounting groove for mounting the fan 11. The fan 11 is fixedly installed inside the second mounting frame 10 for driving the fan blades 12. The fan blades 12 are connected to the output end of the fan 11 by transmission. By starting the fan 11, the fan blades 12 are driven by the output end to rotate, thereby cooling the box. Slots 25 are provided at both ends of the top of the thermostatic box 1 for clamping the filter plate 27 on the top of the thermostatic box 1. A clamping block 26 is clamped inside the slot 25. A filter plate 27 is fixedly installed on the top of the clamping block 26 to prevent the fan 11 from sucking external objects into the interior of the thermostatic box 1 when the fan 11 is running.

[0020] A water pump 3 is fixedly connected to the top of the water tank 2. The water pumping end of the water pump 3 draws the water source in the water tank 2 through a hose. A feed pipe 4 is fixedly connected to the water outlet end of the water pump 3 for convenient water delivery. A first branch pipe 5 is clamped at one end of the feed pipe 4 for installing a flow meter 6 to be calibrated and a pressure sensor 28. The flow meter 6 to be calibrated is flange-connected to the first branch pipe 5; a pressure sensor 28 is fixedly installed at the top of one end of the first branch pipe 5 for detecting water pressure and making appropriate adjustments. A second branch pipe 13 is fixedly connected to one end of the first branch pipe 5 for installing a standard flow meter 14 for data comparison to determine whether the flow meter 6 to be calibrated has any deviation. A standard flow meter 14 is flange-connected to the second branch pipe 13 for data comparison reference. A drain pipe 15 is fixedly connected to one end of the second branch pipe 13 for backflow and discharge of water.

[0021] One end of the drain pipe 15 is fixedly connected to a three-way joint 16 for connecting a pipeline, one end of the three-way joint 16 is fixedly connected to a return pipe 17 for recycling water, and the other end of the three-way joint 16 is fixedly connected to a sewage pipe 18 for discharging sewage to a sewage tank 21 when cleaning the pipeline;

[0022] A first valve port 19 is fixedly installed at one end of the reflux pipe 17 for unblocking and cutting off the reflux of water. The other end of the reflux pipe 17 is fixedly connected to the inside of the water tank 2 for conveniently introducing the reflux water into the water tank 2. A second valve port 20 is fixedly installed at one end of the sewage pipe 18 for conveniently allowing the water to enter the reflux pipe 17 and be discharged. The other end of the sewage pipe 18 passes through the thermostatic tank 1 and is fixedly connected to a sewage tank 21 for collecting sewage. The sewage tank 21 is fixedly installed at the lower side of the thermostatic tank 1 for convenient cleaning and replacement. In normal use, the second valve port 20 is closed to allow water to flow through the reflux pipe 17 into the water tank 2. When cleaning each pipe regularly, the first valve port 19 is closed to allow water to flow down through the drain pipe 15 to the sewage pipe 18 and flow into the sewage tank 21.

[0023] A box door 22 is movably installed at one end of the front of the thermostatic box 1, which is used to keep the box closed and facilitate temperature adjustment. A controller 23 is fixedly installed on the front of the box door 22, which is used to connect and control the temperature sensor 24, the pressure sensor 28, the fan 11, the heating pipe 7 and the water pump 3. A temperature sensor 24 is fixedly installed on the inner wall of one side of the thermostatic box 1, which is used to monitor the temperature in the box, so that the temperature of each component is controlled by the controller 23. The temperature sensor 24 is connected to the controller 23 through a wire;

[0024] During specific use, the data fed back to the controller 23 by the temperature sensor 24 is used to determine whether it is overheating or overcooling, thereby starting the fan 11 or the heating tube 7 to regulate the temperature. After adjusting to the appropriate temperature, the water in the water tank 2 is transported to the pipeline by starting the water pump 3. After the water flows through the pressure sensor 28 on the first branch pipe 5, the water pressure data is fed back to the controller 23, and the output pressure of the water pump 3 is adjusted according to the numerical value. Then, according to the data of the standard flow meter 14, it is determined whether the flow meter 6 to be calibrated has deviations, so that it is calibrated.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small flow volume flow meter calibration device, comprising a constant temperature box (1), characterized in that: The thermostatic box (1) is provided with a water tank (2) inside, a water pump (3) is fixedly connected to the top of the water tank (2), a feed pipe (4) is fixedly connected to the water outlet end of the water pump (3), a first branch pipe (5) is clamped at one end of the feed pipe (4), and a flow meter (6) to be calibrated is flange-connected to the first branch pipe (5); a heating pipe (7) is fixedly mounted on the bottom surface of the thermostatic box (1), a heat conducting plate (8) is fixedly mounted on the top of the heating pipe (7), a first mounting frame (9) is fixedly mounted on the top of the heat conducting plate (8), the water tank (2) is fixedly mounted on the top of the first mounting frame (9), a mounting groove is provided on the top of the thermostatic box (1), a second mounting frame (10) is fixedly mounted inside the mounting groove, a fan (11) is fixedly mounted inside the second mounting frame (10), and a fan blade (12) is drivingly connected to the output end of the fan (11).

2. A small flow volume flowmeter calibration device according to claim 1, characterized in that: A pressure sensor (28) is fixedly mounted on the top of one end of the first branch pipe (5), the other end of the first branch pipe (5) is fixedly connected to the second branch pipe (13), a standard flow meter (14) is flange-connected to the second branch pipe (13), and one end of the second branch pipe (13) is fixedly connected to a drain pipe (15).

3. A small flow volume flowmeter calibration device according to claim 2, characterized in that: One end of the drainage pipe (15) is fixedly connected to a three-way joint (16), one end of the three-way joint (16) is fixedly connected to a return pipe (17), and the other end of the three-way joint (16) is fixedly connected to a sewage pipe (18).

4. A small flow volume flowmeter calibration device according to claim 3, characterized in that: A first valve port (19) is fixedly mounted on one end of the return pipe (17), and the other end of the return pipe (17) is fixedly connected to the interior of the water tank (2). A second valve port (20) is fixedly mounted on one end of the sewage pipe (18), and the other end of the sewage pipe (18) passes through the thermostatic box (1) and is fixedly connected to a sewage tank (21). The sewage tank (21) is fixedly mounted below one side of the thermostatic box (1).

5. A small flow volume flowmeter calibration device according to claim 1, characterized in that: A box door (22) is movably mounted on one end of the front of the thermostatic box (1) via a hinge, a controller (23) is fixedly mounted on the front of the box door (22), and a temperature sensor (24) is fixedly mounted on an inner wall of one side of the thermostatic box (1), the temperature sensor (24) being connected to the controller (23) via a wire.

6. A small flow volume flow meter calibration device according to claim 1, characterized in that: The thermostatic box (1) has slots (25) at both ends of the top, a card block (26) is snapped into the interior of the slot (25), and a filter plate (27) is fixedly mounted on the top of the card block (26).

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