A gas flow corrector

Abstract

The utility model relates to the field of gas flow measurement, specifically disclose a kind of gas flow correction instrument, through being equipped with magnetic induction sensor in the side of piston cylinder, be equipped with strong permanent magnet on piston block, when needing to test gas flow, the change curve data of magnetic field magnetic flux in the movement of strong permanent magnet on piston block is sensed and recorded by using magnetic induction sensor and the time used to calculate the flow value of gas, because the direction of magnetic field is directional direction, therefore magnetic induction sensor can sense that strong permanent magnet of piston block is always on a horizontal plane, there is no band-pass height error, and magnetic induction mode has no requirement to the light transmittance of piston cylinder surface, does not need routine maintenance cleaning, and magnetic field also cannot weaken with time, can improve service life while also guarantee measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of gas flow measurement, and in particular to a gas flow calibration instrument. Background Technology

[0002] Currently, most industrial gas flow measurement devices use soap film flow meters. These meters combine an internal microprocessor with a sensitive element to measure and calculate the start and end time of the soap film or sheet passing through one end of the glass tube, ultimately calculating the gas flow rate. Soap film flow meters primarily use photoelectric sensors to record the piston movement process. However, photoelectric sensors require a high degree of cleanliness during sensing. If dust or other impurities adhere to the glass tube, the energy emitted by the photoelectric sensor is easily weakened by these impurities. Long-term use or measurement of unclean gases can affect the transmittance of the light transmission medium, leading to a series of problems such as measurement deviations and instrument recalibration. Furthermore, the photoelectric sensor's emission has a bandpass height after passing through the glass tube, causing fluctuations in the receiving tube's sensing, thus affecting measurement accuracy. Additionally, the phototube of the photoelectric sensor gradually ages over time, reducing both transmission and reception power, leading to increased sensing errors and affecting the accuracy of the test data.

[0003] The technical problem to be solved in this application is: to design a gas flow rate calibrator that can guarantee the accuracy of the test. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a gas flow calibration instrument that can guarantee the testing accuracy.

[0005] The technical solution adopted by this utility model is as follows: a gas flow calibrator, including an inlet connector and an outlet connector. The inlet connector is provided with an inlet channel connected thereto, and the outlet connector is provided with an outlet channel connected thereto. A piston cylinder is provided between the inlet channel and the outlet channel. A piston block is provided inside the piston cylinder and is limited to its movement. Several magnetic induction sensors are provided on the side of the piston cylinder, and a strong permanent magnet is provided on the piston block.

[0006] In some embodiments, the air intake passage includes an air intake splitter pipe and an air intake stabilizing flow channel connected to the air intake splitter pipe, and the air outlet passage includes an air outlet pipe and an air outlet stabilizing flow channel connected to the air outlet pipe. The air intake connector is connected to the air intake splitter pipe, and the air outlet connector is connected to the air outlet stabilizing flow channel.

[0007] In some implementations, the intake stabilizing flow channel and the exhaust pipe are respectively connected to both ends of the piston cylinder.

[0008] In some implementations, a connecting pipe is provided between the intake splitter pipe and the exhaust stabilizing flow channel.

[0009] In some implementations, the connecting pipe is equipped with a precision electronically controlled valve at the end near the intake splitter pipe, and a coarse adjustment flow valve at the end near the outlet stabilizing flow channel.

[0010] In some implementations, a strong permanent magnet is disposed on the upper surface of the piston block.

[0011] In some embodiments, annular sealing rings are provided at both the upper and lower ends of the piston cylinder.

[0012] In some embodiments, the system includes a housing, a piston cylinder disposed within the housing, and the openings of the air inlet and outlet connectors disposed outside the housing.

[0013] In some embodiments, the housing also contains a magnetic induction circuit PCB board that is connected to the magnetic induction sensor signal.

[0014] In some embodiments, a transparent observation window is provided on the side of the housing, and a touch screen is provided on the top surface of the housing.

[0015] This invention has the following technical advantages: By providing a magnetic induction sensor on the side of the piston cylinder and a strong permanent magnet on the piston block, when it is necessary to test the gas flow rate, the magnetic induction sensor is used to sense and record the change curve data of the magnetic flux of the magnetic field during the movement of the strong permanent magnet on the piston block and the time taken, thereby calculating the gas flow rate. Since the magnetic field direction is directional, the magnetic induction sensor can sense that the strong permanent magnet of the piston block is always on a horizontal plane, and there is no bandpass height error. Moreover, the magnetic induction method does not require the light transmittance of the piston cylinder surface, does not require daily maintenance and cleaning, and the magnetic field will not weaken over time, which can improve the service life while ensuring measurement accuracy. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the gas flow correction instrument of this utility model; Figure 2 This is a schematic diagram of the gas flow correction instrument of this utility model.

[0017] The labels and names in the diagram correspond as follows: 1. Inlet connector; 2. Outlet connector; 3. Inlet channel; 4. Outlet channel; 5. Piston cylinder; 50. Piston block; 51. Magnetic induction sensor; 52. Strong permanent magnet; 30. Inlet splitter pipe; 31. Inlet speed regulating channel; 40. Outlet pipe; 41. Outlet speed regulating channel; 6. Connecting pipe; 7. Precision electric control valve; 8. Coarse adjustment flow valve; 53. Annular sealing ring; 9. Housing; 90. Magnetic induction circuit PCB board; 91. Observation window; 92. Touch screen. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-2 This utility model provides a technical solution: a gas flow calibrator, including an inlet connector 1 and an outlet connector 2. The inlet connector 1 is provided with an inlet channel 3 connected thereto, and the outlet connector 2 is provided with an outlet channel 4 connected thereto. A piston cylinder 5 is provided between the inlet channel 3 and the outlet channel 4. A piston block 50 is provided inside the piston cylinder 5 and is movable within it. Several magnetic induction sensors 51 are provided on the side of the piston cylinder 5, and a strong permanent magnet 52 is provided on the piston block 50. By providing magnetic induction sensors 51 on the side of the piston cylinder 5 and a strong permanent magnet 52 on the piston block 50, when it is necessary to test the gas flow rate, the magnetic induction sensor can be used to calibrate the gas flow rate. The sensor 51 senses and records the time taken for the strong permanent magnet 52 on the piston block 50 to move, thereby calculating the gas flow rate. Since the magnetic field direction is directional, the magnetic induction sensor 51 can sense that the strong permanent magnet 52 on the piston block 50 is always on a horizontal plane, and there is no bandpass height error. Moreover, the magnetic induction method does not require the cleanliness of the piston cylinder 5 surface, does not require daily maintenance and cleaning, and the magnetic field will not weaken over time. It can improve the service life while ensuring measurement accuracy. In addition, compared with traditional photoelectric induction, magnetic induction is also more resistant to high temperature and will not have the problem of reduced sensing sensitivity under high temperature environment.

[0020] The intake channel 3 includes an intake split pipe 30 and an intake stabilizing flow channel 31 connected to the intake split pipe 30. The outlet channel 4 includes an outlet pipe 40 and an outlet stabilizing flow channel 41 connected to the outlet pipe 40. The intake connector 1 is connected to the intake split pipe 30, and the outlet connector 2 is connected to the outlet stabilizing flow channel 41. The intake stabilizing flow channel 31 and the outlet pipe 40 are respectively connected to both ends of the piston cylinder 5. A connecting pipe 6 is provided between the intake split pipe 30 and the outlet stabilizing flow channel 41. A precision electronically controlled valve 7 is provided at the end of the connecting pipe 6 near the intake split pipe 30, and a coarse adjustment flow valve 8 is provided at the end of the connecting pipe 6 near the outlet stabilizing flow channel 41. The diameter of the intake stabilizing flow channel 31 is smaller than the diameter of the intake split pipe 30. When gas flows from the intake split pipe 30 into the intake stabilizing flow channel 31, the gas phase changes due to the smaller diameter of the intake stabilizing flow channel 31. When the gas flow rate increases due to compression, and when gas flow rate testing is not required, the precision electronic control valve 7 opens. At this time, the intake manifold 30 is connected to the connecting pipe 6, while the intake manifold 30 is closed to the intake flow rate stabilizing channel 31. Gas enters the intake manifold 30 from the intake connector 1, flows through the connecting pipe 6 to the outlet flow rate stabilizing channel 41, and then flows out from the outlet connector 2. When gas flow rate testing is required, the precision electronic control valve 7 closes. At this time, the intake manifold 30 is closed to the connecting pipe 6, while the intake manifold 30 is open to the intake flow rate stabilizing channel 31. Gas enters the intake manifold 30 from the intake connector 1, enters the intake flow rate stabilizing channel 31, and then flows into the piston cylinder 5, thereby pushing the piston block 50 to move. Finally, the gas flows from the piston cylinder 5 to the outlet pipe 40, and then from the outlet flow rate stabilizing channel 41 to the outlet connector 2.

[0021] By installing a precision electric control valve 7 and a coarse flow adjustment valve 8 on the connecting pipe 6, the coarse flow adjustment valve 8 can be manually adjusted to control the gas flow rate through the connecting pipe 6. If further precise control of the gas flow rate through the connecting pipe 6 is required, the precision electric control valve 7 is needed for further precise control.

[0022] The strong permanent magnet 52 is disposed on the upper surface of the piston block 50, and the strong permanent magnet 52 is oriented with high magnetic field, the magnetic field direction is perpendicular to the movement direction of the piston block 50, and the magnetic field is along the upper surface of the piston block 50.

[0023] Both the upper and lower ends of the piston cylinder 5 are provided with annular sealing rings 53 to ensure the sealing performance of the piston cylinder 5.

[0024] The gas flow calibrator also includes a housing 9, in which the piston cylinder 5 is located inside the housing 9, and the opening ends of the inlet connector 1 and the outlet connector 2 are located outside the housing 9. Inside the housing 9, there is also a magnetic induction circuit PCB board 90 that is connected to the magnetic induction sensor 51. The side of the housing 9 is also provided with a transparent observation window 91, and the top surface of the housing 9 is also provided with a touch screen 92.

[0025] The working principle of this utility model is as follows: A magnetic induction sensor 51 is provided on the side of the piston cylinder 5, and a strong permanent magnet 52 is provided on the piston block 50. When it is necessary to test the gas flow rate, the magnetic induction sensor 51 is used to sense and record the change curve data of the magnetic flux of the magnetic field during the movement of the strong permanent magnet 52 on the piston block 50 and the time taken, thereby calculating the gas flow rate. Since the magnetic field direction is directional, the magnetic induction sensor 51 can sense that the strong permanent magnet 52 of the piston block 50 is always on a horizontal plane, and there is no bandpass height error. Moreover, the magnetic induction method does not require the light transmittance of the piston cylinder 5 surface, does not require daily maintenance and cleaning, and the magnetic field will not weaken over time, which can improve the service life while ensuring measurement accuracy.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas flow rate calibrator, characterized in that, It includes an air inlet connector and an air outlet connector. The air inlet connector has an air inlet channel connected to it, and the air outlet connector has an air outlet channel connected to it. A piston cylinder is provided between the air inlet channel and the air outlet channel. A piston block is provided inside the piston cylinder and is limited to its movement. Several magnetic induction sensors are provided on the side of the piston cylinder, and a strong permanent magnet is provided on the piston block.

2. The gas flow rate corrector according to claim 1, characterized in that, The air intake channel includes an air intake splitter pipe and an air intake stabilizing flow channel connected to the air intake splitter pipe. The air outlet channel includes an air outlet pipe and an air outlet stabilizing flow channel connected to the air outlet pipe. The air intake connector is connected to the air intake splitter pipe, and the air outlet connector is connected to the air outlet stabilizing flow channel.

3. The gas flow rate corrector according to claim 2, characterized in that, The intake stabilizing flow channel and the exhaust pipe are respectively connected to both ends of the piston cylinder.

4. The gas flow rate corrector according to claim 2, characterized in that, The intake splitter pipe and the outlet stabilizing flow channel are connected by a connecting pipe.

5. The gas flow rate corrector according to claim 4, characterized in that, The connecting pipe is equipped with a precision electronically controlled valve at the end near the intake splitter pipe, and a coarse adjustment flow valve at the end near the outlet stabilizing flow channel.

6. The gas flow rate corrector according to claim 1, characterized in that, The strong permanent magnet is located on the upper surface of the piston block.

7. The gas flow rate corrector according to claim 1, characterized in that, Both the upper and lower ends of the piston cylinder are provided with annular sealing rings.

8. The gas flow rate corrector according to claim 1, characterized in that, It includes a housing, the piston cylinder is disposed inside the housing, and the opening ends of the air inlet and air outlet are disposed outside the housing.

9. The gas flow rate corrector according to claim 8, characterized in that, The housing also contains a magnetic induction circuit PCB board that is connected to the magnetic induction sensor signal.

10. The gas flow rate corrector according to claim 8, characterized in that, The side of the housing is also provided with a transparent observation window, and the top surface of the housing is also provided with a touch screen.

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