Calibration equipment of gas sensor

Abstract

The utility model relates to the technical field of gas sensors, and provides calibration equipment of a gas sensor, which comprises a pressure-bearing plate, a pressure-bearing column is fixedly connected to the top of the pressure-bearing plate, a driven bevel gear is fixedly connected to the top of the pressure-bearing column, and a main case is rotatably connected to the outer surface of the pressure-bearing column. Two shaft plates are fixedly connected to the bottom of the inner surface of the main machine shell, bearing rods are rotationally connected to the inner sides of the two shaft plates, one ends of the bearing rods extend out, driving bevel gears are fixedly connected to the ends, extending out, of the bearing rods, and the outer surfaces of the driving bevel gears are connected to the outer surfaces of driven bevel gears in a meshed mode; according to the sensor calibration device, air flow can be accelerated in a multi-angle mode, when the sensor is calibrated, the sensor can receive air flow at all angles, calibration is carried out, the air absorption range is large, calibration is more accurate, and the sensor calibration device has the advantages of being simple in structure, convenient to operate and high in practicability. And the calibration efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sensors, in particular to a calibration device for a gas sensor. Background Art

[0002] Calibration of gas sensors is very important. Calibration can ensure that the concentration value output by the gas sensor is accurate, which improves the precision and accuracy of the measurement. Calibration can ensure that the sensor can accurately report the concentration when monitoring hazardous gases, thereby ensuring the safety of the workplace and environment. In some industries, gas sensors need to be calibrated regularly to comply with regulations and prescribed standards. Accurate calibration can improve the performance and response speed of the sensor, ensuring that the equipment can respond promptly and accurately when monitoring gas. Through calibration, the compliance of the equipment can be guaranteed.

[0003] However, in the prior art, for example, China Publication No.: CN218917322U, "A calibration device for a gas sensor", the utility model relates to the technical field of gas detection instruments and meters, and discloses a calibration device for a gas sensor, including a standard gas tube, a mass flow meter is fixedly installed at one end of the standard gas tube, one end of the mass flow meter is fixedly connected to a stainless steel tube, one end of the stainless steel tube is fixedly connected to a collection tube, one end of the collection tube is fixedly installed with a three-way head, one end of the three-way head is fixedly connected to an exhaust valve, one end of the exhaust valve is fixedly connected to a gas flow meter, and one end of the gas flow meter is provided with an exhaust port. The utility model is provided with a host computer control protocol conversion module, the protocol conversion module opens the mass flow meter through a control signal line, and the standard gas tube transports the detection gas in the gas cylinder to the mass flow meter, and then enters the collection tube through the stainless steel tube.

[0004] However, this device cannot accelerate air flow at multiple angles, and cannot allow the sensor to receive air flow at various angles for calibration. The small range of air absorption leads to inaccurate calibration and low calibration efficiency. The device cannot prevent the gas from being tested again, resulting in repeated testing of gas in the same area, resulting in inaccurate detection and failure to meet regulations and prescribed standards. Utility Model Content

[0005] The purpose of the utility model is to solve the problems that the devices in the prior art cannot accelerate the air flow at multiple angles, cannot allow the sensor to receive the air flow at various angles for calibration when calibrating the sensor, the air absorption range is small, resulting in inaccurate calibration, low calibration efficiency, the device cannot avoid the gas after detection being detected, resulting in repeated detection of gas in the same area, resulting in inaccurate detection and failure to meet regulations and prescribed standards.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a calibration device for a gas sensor, comprising a pressure-bearing plate, the top of the pressure-bearing plate is fixedly connected to a pressure-bearing column, the top of the pressure-bearing column is fixedly connected to a driven bevel gear, the outer surface of the pressure-bearing column is rotatably connected to a main casing, the inner surface bottom of the main casing is fixedly connected to two shaft plates, the inner sides of the two shaft plates are rotatably connected to a receiving rod and extend one end, the extended end of the receiving rod is fixedly connected to a driving bevel gear, the outer surface of the driving bevel gear is meshedly connected to the outer surface of the driven bevel gear, the outer surface of the receiving rod is fixedly sleeved with a driven rotating wheel, the outer surface of the driven rotating wheel is transmission-connected with a synchronous belt, the inner surface of the synchronous belt is transmission-connected with the driving rotating wheel on a side away from the driven rotating wheel, and a power rod is fixedly penetrated inside the driving rotating wheel:

[0007] A motor is disposed at one end of the power rod, and a fan blade assembly is fixedly connected to the end of the power rod away from the motor:

[0008] The outer surface of the motor is fixedly sleeved with a connecting sleeve, and the outer surface of the connecting sleeve is fixedly connected to two connecting rods, and one end of the two connecting rods away from the connecting sleeve is fixedly connected to the inner surface of the main housing:

[0009] A plurality of air inlet slots are provided on one side of the main housing, and a sealing cover is movably sleeved on the top of the main housing:

[0010] The main housing is connected to an air outlet pipe on one side away from the air inlet slot, a ventilator is fixedly embedded in the air outlet pipe, and two pull rods are movably inserted in the ventilator:

[0011] One end of the two pull rods is fixedly connected to a valve plate, and one end of the pull rod away from the valve plate is fixedly connected to a force-bearing plate:

[0012] The outer surface of the pull rod is movably sleeved with a spring, and one end of the spring away from the force-bearing plate is fixedly connected to one side of the ventilator, and one end of the spring away from the ventilator is fixedly connected to one side of the force-bearing plate:

[0013] A fixing rod is fixedly connected to the bottom of the inner surface of the main housing, and a sensor body is fixedly connected to the top of the fixing rod.

[0014] Compared with the prior art, the advantages and positive effects of the utility model are:

[0015] The utility model can accelerate air flow at multiple angles, and can allow the sensor to receive air flow at various angles when calibrating the sensor, so as to perform calibration, thereby making the air absorption range larger, the calibration more accurate, and the calibration efficiency higher.

[0016] The utility model can prevent the detected gas from being tested again, allows the gas to flow in one direction, and avoids repeated testing of the gas in the same area, so that the detection is accurate and meets the standards of laws and regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic cross-sectional structure diagram of a gas sensor calibration device provided by the utility model;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a gas sensor calibration device provided by the utility model;

[0019] Figure 3 A schematic cross-sectional structure diagram of a gas sensor calibration device provided by the utility model;

[0020] Figure 4 A gas sensor calibration device provided by the utility model Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0021] Figure 5 A gas sensor calibration device provided by the utility model Figure 3 Schematic diagram of the enlarged structure of B.

[0022] Legend:

[0023] 1. Pressure plate; 2. Pressure column; 3. Driven bevel gear; 4. Main housing; 5. Shaft plate; 6. Receiver rod; 7. Driving bevel gear; 8. Driven rotor; 9. Motor; 10. Power rod; 11. Driving rotor; 12. Synchronous belt; 13. Fan blade assembly; 14. Connecting sleeve; 15. Connecting rod; 16. Air inlet slot; 17. Sealing cover; 18. Air outlet duct; 19. Ventilation tube; 20. Pull rod; 21. Valve plate; 22. Force plate; 23. Spring; 24. Fixing rod; 25. Sensor body. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-5The utility model provides a technical solution: a calibration device for a gas sensor, comprising a pressure plate 1, a pressure column 2 is fixedly connected to the top of the pressure plate 1, a driven bevel gear 3 is fixedly connected to the top of the pressure column 2, the outer surface of the pressure column 2 is rotatably connected to a main housing 4, the inner surface bottom of the main housing 4 is fixedly connected to two shaft plates 5, the inner sides of the two shaft plates 5 are rotatably connected to a receiving rod 6 and one end is extended, the extended end of the receiving rod 6 is fixedly connected to a driving bevel gear 7, the outer surface of the driving bevel gear 7 is meshed and connected to the outer surface of the driven bevel gear 3 The outer surface of the receiving rod 6 is fixedly sleeved with a driven rotating wheel 8, and the outer surface of the driven rotating wheel 8 is transmission-connected with a synchronous belt 12, and the inner surface of the synchronous belt 12 is transmission-connected with a driving rotating wheel 11 on the side away from the driven rotating wheel 8, and a power rod 10 is fixedly penetrated inside the driving rotating wheel 11. In the process of the driving rotating wheel 11 following the rotation of the power rod 10, the driven rotating wheel 8 will be driven to rotate under the transmission action of the synchronous belt 12, and the receiving rod 6 rotating with the driven rotating wheel 8 will rotate inside the shaft plate 5, and drive the driving bevel gear 7 to rotate together:

[0026] A motor 9 is disposed at one end of the power rod 10, and a fan blade group 13 is fixedly connected to the end of the power rod 10 away from the motor 9. The fan blade group 13 rotating with the power rod 10 will generate wind force and drive air circulation:

[0027] The outer surface of the motor 9 is fixedly sleeved with a connecting sleeve 14, and the outer surface of the connecting sleeve 14 is fixedly connected to two connecting rods 15, and one end of the two connecting rods 15 away from the connecting sleeve 14 is fixedly connected to the inner surface of the main housing 4:

[0028] A plurality of air inlet slots 16 are provided on one side of the main housing 4, and a sealing cover 17 is movably sleeved on the top of the main housing 4. The sealing cover 17 provided on the top of the main housing 4 facilitates maintenance of the internal structure of the main housing 4:

[0029] The side of the main housing 4 away from the air inlet slot 16 is connected to an air outlet pipe 18, and a ventilator 19 is fixedly embedded in the air outlet pipe 18. Two pull rods 20 are movably penetrated in the ventilator 19, and the gas flows out of the main housing 4 from the ventilator 19 in the air outlet pipe 18:

[0030] One end of the two tie rods 20 is fixedly connected to a valve plate 21, and the end of the tie rod 20 away from the valve plate 21 is fixedly connected to a force plate 22. When the valve plate 21 and the ventilator 19 are kept in a sealed state, the gas cannot enter the device through the ventilator 19 in the reverse direction:

[0031] The outer surface of the pull rod 20 is movably sleeved with a spring 23, and one end of the spring 23 away from the force plate 22 is fixedly connected to one side of the ventilator 19, and one end of the spring 23 away from the ventilator 19 is fixedly connected to one side of the force plate 22. Because the spring 23 pushes the force plate 22 in a normal state, the valve plate 21 and the ventilator 19 and the valve plate 21 are pulled by the pull rod 20 to maintain a sealed state, so that the gas cannot enter the main housing 4 from the air outlet pipe 18:

[0032] A fixing rod 24 is fixedly connected to the bottom of the inner surface of the main housing 4 , and a sensor body 25 is fixedly connected to the top of the fixing rod 24 . The sensor body 25 is fixed inside the main housing 4 through the fixing rod 24 .

[0033] Working principle: When the sensor body 25 needs to be calibrated, the pressure plate 1 and the top device need to be placed in a room with different gas concentrations, and the gas in the sensing room is received. The sensor is initially calibrated using a standard gas of known concentration so that the sensor reading matches the known concentration. The external power supply of the motor 9 can be turned on before receiving. The motor 9 is connected to the external power supply through an electric wire. The model of the motor 9 is DOY106, and the rated power is 750W. The motor 9 is fixedly connected to the main housing 4 through the connecting sleeve 14 and the connecting rod 15. After the motor 9 is energized, the power rod 10 will be driven to rotate. The fan blade group 13 rotating with the power rod 10 will generate wind and drive air circulation, and the indoor air will be passed into the main housing 4 through the air inlet slot 16. The sensor body 25 connected to the main housing 4 through the fixing rod 24 will receive these gases. The sensor body 25 uses the absorption or scattering of light of a specific wavelength by the gas to measure the gas concentration. By measuring the change in the intensity of the light, the gas concentration can be inferred. After the measurement Since the gas has gas pressure due to its flow, it will push the force plate 22 and the valve plate 21, compress the spring 23, and flow out of the main casing 4 from the ventilating tube 19 in the air outlet pipe 18. Because the spring 23 will push the force plate 22 in a normal state, the valve plate 21 and the ventilating tube 19 are pulled by the pull rod 20 and the valve plate 21 remain in a sealed state, so that the gas cannot enter the main casing 4 from the air outlet pipe 18, thereby avoiding repeated detection of the gas in the same area. At the same time, in the process of the active runner 11 following the rotation of the power rod 10, the driven runner 8 will be driven to rotate under the transmission action of the synchronous belt 12, and the receiving rod 6 that rotates with the driven runner 8 will rotate inside the shaft plate 5, and drive the active bevel gear 7 to rotate together, and then under the meshing action of the active bevel gear 7 on the driven bevel gear 3, the main casing 4 will make a circular motion with the pressure column 2 as the axis, so that the air inlet slot 16 can receive air from all angles to enter the device. The sealing cover 17 arranged on the top of the main casing 4 can facilitate the maintenance of the internal structure of the main casing 4.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A gas sensor calibration device, characterized in that: The invention comprises a pressure-bearing plate (1), the top of which is fixedly connected to a pressure-bearing column (2), the top of which is fixedly connected to a driven bevel gear (3), the outer surface of which is rotatably connected to a main housing (4), the inner surface of which is fixedly connected to two shaft plates (5), the inner sides of the two shaft plates (5) are rotatably connected to a receiving rod (6) and one end of which is extended, the extended end of which is fixedly connected to a driving bevel gear (7), the outer surface of which is meshingly connected to the outer surface of the driven bevel gear (3), the outer surface of which is fixedly sleeved to a driven rotating wheel (8), the outer surface of which is transmission-connected to a synchronous belt (12), the inner surface of which is away from the driven rotating wheel (8) is transmission-connected to a driving rotating wheel (11), and a power rod (10) is fixedly penetrated inside the driving rotating wheel (11): A motor (9) is disposed at one end of the power rod (10), and a fan blade assembly (13) is fixedly connected to one end of the power rod (10) away from the motor (9): The outer surface of the motor (9) is fixedly sleeved with a connecting sleeve (14), and the outer surface of the connecting sleeve (14) is fixedly connected to two connecting rods (15), and one end of the two connecting rods (15) away from the connecting sleeve (14) is fixedly connected to the inner surface of the main housing (4): A plurality of air inlet slots (16) are provided on one side of the main housing (4), and a sealing cover (17) is movably sleeved on the top of the main housing (4): The side of the main housing (4) away from the air inlet slot (16) is connected to an air outlet pipe (18), a ventilator (19) is fixedly embedded in the interior of the air outlet pipe (18), and two pull rods (20) are movably inserted into the interior of the ventilator (19): One end of the two pull rods (20) is fixedly connected to a valve plate (21), and one end of the pull rod (20) away from the valve plate (21) is fixedly connected to a force-bearing plate (22): A spring (23) is movably sleeved on the outer surface of the pull rod (20); one end of the spring (23) away from the force-bearing plate (22) is fixedly connected to one side of the ventilating cylinder (19); and one end of the spring (23) away from the ventilating cylinder (19) is fixedly connected to one side of the force-bearing plate (22): A fixing rod (24) is fixedly connected to the bottom of the inner surface of the main housing (4), and a sensor body (25) is fixedly connected to the top of the fixing rod (24).

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