Oxygen content detection device

Abstract

The utility model relates to the technical field of gas detection devices, and discloses an oxygen content detection device which comprises a shell, a control circuit board is fixed at the bottom of the shell, a fixed plate is arranged above the control circuit board, two detection cavities are arranged on the fixed plate in parallel, and two groups of gas inlet pipes and exhaust pipes are correspondingly arranged on the rear side of the shell. Each detection cavity is provided with an oxygen sensor, and a detection part of the oxygen sensor is arranged in the detection cavity; each group of gas inlet pipes comprises a detection gas inlet pipe and a replacement gas inlet pipe, the detection gas inlet pipe is communicated with the corresponding detection cavity through a first pipeline, the replacement gas inlet pipe is communicated with the corresponding detection cavity through a second pipeline, the exhaust pipe is communicated with the detection cavity through a third pipeline, and the second pipeline is provided with a flow valve; and a micro air pump and an exhaust valve are arranged on the third pipeline. According to the utility model, the detection efficiency is improved through double chambers, residual gas in the detection chamber can be effectively discharged, residual pollution is reduced, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection devices, in particular to an oxygen content detection device. Background Art

[0002] In the gas filling industry, it's necessary to test the oxygen content of gas in filled cylinders. Oxygen content detection devices, which use oxygen sensors to measure oxygen content, are commonly used in laboratory gas analysis. Existing oxygen content detection devices often have a single detection chamber, resulting in low detection efficiency. When switching between different detection gases, residual gas cannot be effectively expelled, which can easily lead to contamination and affect test results. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and provide an oxygen content detection device, which improves the detection efficiency through the dual chamber, reduces the residual pollution of the detection gas, and improves the detection accuracy.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an oxygen content detection device, comprising a shell, a control circuit board is fixed to the bottom of the shell, a fixing plate is provided above the control circuit board, two detection cavities are arranged side by side on the fixing plate, and two groups of gas inlet pipes and exhaust pipes are provided on the rear side of the shell, each of the detection chambers is installed with an oxygen sensor, and the detection part of the oxygen sensor is provided in the detection chamber; each group of gas inlet pipes includes a detection gas inlet pipe and a replacement gas inlet pipe, the detection gas inlet pipe is connected to the corresponding detection chamber through a first pipeline, the replacement gas inlet pipes are connected to the corresponding detection chamber through a second pipeline, and the exhaust pipe is connected to the detection chamber through a third pipeline, a flow valve is provided on the second pipeline, and a micro air pump and an exhaust valve are provided on the third pipeline.

[0005] Furthermore, it also includes an adsorption bottle, two grooves are provided on the cover plate of the shell, the adsorption bottle is provided in the grooves, and connectors connected to the adsorption bottle are provided at both ends of the grooves, one end of the connector is connected to the first pipeline through a three-way regulating valve, and the other connector is connected to the detection chamber through a one-way valve.

[0006] Furthermore, a cover plate is fixed on the groove by bolts, and a detachable hoop for fixing the adsorption bottle is provided in the groove.

[0007] Furthermore, a control panel and a button switch are provided at the front end of the shell. Two control panels are provided, corresponding to the two detection cavities respectively. The control panels are electrically connected to the control circuit board.

[0008] Furthermore, a power communication interface is provided on the rear side of the shell, and the power communication interface is electrically connected to the control circuit board.

[0009] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0010] The utility model provides two detection chambers, which can be used in conjunction with each other for replacement, thereby improving detection efficiency; by providing a micro pump in conjunction with the detection chamber, air can be pumped by the micro pump, which can effectively discharge residual gas in the detection chamber before air intake, ensuring that the gas entering the detection chamber will not be mixed with the previous gas; when the detected gases are different, replacement gas can be introduced into the detection chamber through the replacement gas inlet to perform gas replacement cleaning on the detection chamber, making it less likely for the detection chamber to be contaminated, thereby ensuring detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural schematic diagram of an oxygen content detection device of the present utility model;

[0012] Figure 2 This is a left-side structural schematic diagram of the present utility model;

[0013] Figure 3 This is a schematic cross-sectional view of the utility model;

[0014] In the figure: 1-housing, 2-control panel, 3-switch button, 4-power communication interface, 5-test gas inlet pipe, 6-replacement gas inlet pipe, 7-exhaust pipe, 8-control circuit board, 9-fixing plate, 10-test chamber, 11-groove, 12-adsorption bottle, 13-clamp, 14-three-way regulating valve, 15-flow valve, 16-micro air pump, 17-exhaust valve, 19-oxygen sensor. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0016] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0017] like Figure 1-Figure 3 As shown, an oxygen content detection device includes a shell 1, a control circuit board 8 is fixed to the bottom of the shell 1, a fixing plate 9 is provided above the control circuit board 8, two detection chambers 10 are arranged side by side on the fixing plate 9, and two groups of gas inlet pipes and exhaust pipes 7 are provided on the rear side of the shell 1. An oxygen sensor 19 is installed in each detection chamber 10; each group of gas inlet pipes includes a detection gas inlet pipe 5 and a replacement gas inlet pipe 6, the detection gas inlet pipe 5 is connected to the corresponding detection chamber 10 through a first pipeline, the replacement gas inlet pipe 6 is connected to the corresponding detection chamber 10 through a second pipeline, the exhaust pipe 7 is connected to the detection chamber 10 through a third pipeline, a flow valve 15 is provided on the second pipeline, and a micro air pump 16 and an exhaust valve 17 are provided on the third pipeline.

[0018] To prevent interfering substances in the gas, such as impure water, from entering the detection chamber 10, an adsorption bottle 12 is also included. Two grooves 11 are provided on the cover plate of the housing 1. The adsorption bottle 12 is positioned within each groove 11. Connectors for connecting to the adsorption bottle 12 are provided at both ends of the groove 11. One end of the connector communicates with the first pipeline via a three-way regulating valve 14, while the other connects to the detection chamber 10 via a one-way valve. The three-way regulating valve 14 switches the gas path. When adsorption and impurity removal are required, the gas first passes through the adsorption bottle 12 for adsorption and impurity removal before entering the detection chamber 10. When adsorption and impurity removal are not required, the gas can enter the detection chamber 10 directly.

[0019] A cover is fixed on the groove 11 by bolts, and a hoop 13 for fixing the adsorption bottle 12 is provided in the groove 11. The hoop 13 can be fixed by bolts, etc. The cover makes it easy to disassemble and replace the adsorption bottle 12, and the hoop 13 can effectively fix the adsorption bottle 12.

[0020] The front end of the housing 1 is provided with a control panel 2 and a switch button 3. Two control panels 2 are provided, one corresponding to each of the two detection chambers 10. The control panels 2 are electrically connected to the control circuit board 8. The control panel 2 can be used to set detection parameters. The control panel 2 has a display that can display detection data in real time, making it easy to obtain detection results. The rear side of the housing 1 is provided with a power communication interface 4, which is electrically connected to the control circuit board 8 and can be connected to an external power source and communication equipment.

[0021] When detecting, the gas cylinder to be detected is connected with the detection gas inlet pipe 5, the displacement gas cylinder is connected with the displacement gas inlet pipe 6, parameters are set through the control panel 2, the detection cavity 10 is pumped through the micro pump, the internal gas is emptied, then the gas cylinder to be detected is opened, the gas enters the detection cavity 10, the oxygen sensor 19 detects the gas content, after the test is completed, the exhaust valve 17 can be opened, the gas in the detection cavity 10 is pumped out through the micro pump, the residual gas in the detection cavity 10 can be effectively exhausted before the gas is inhaled, the gas entering the detection cavity 10 cannot be mixed with the previous gas, then the next group of gas detection is carried out, when the next group of gas is different gas, in order to prevent affecting the detection result, the displacement gas can be inhaled, the detection cavity 10 is cleaned and replaced by the displacement gas, the detection cavity 10 is not easy to be polluted, the detection accuracy is ensured. The displacement gas is pumped out, the gas to be detected is inhaled. When the detection gas contains impurities such as water, the three-way adjusting valve 14 can be selected to inhale the gas into the adsorption bottle 12 first to remove the impurities, then the gas enters the detection cavity 10 to be detected, the pollution and interference are avoided.

[0022] The utility model is described in detail above, but some modifications or improvements can be made on the basis of the utility model, which is obvious to the general technical personnel in the technical field. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. An oxygen content detection device, characterized in that: It includes a shell, a control circuit board is fixed to the bottom of the shell, a fixing plate is provided above the control circuit board, two detection chambers are arranged side by side on the fixing plate, and two groups of gas inlet pipes and exhaust pipes are provided on the rear side of the shell respectively, an oxygen sensor is installed on each of the detection chambers, and the detection part of the oxygen sensor is arranged in the detection chamber; each group of gas inlet pipes includes a detection gas inlet pipe and a replacement gas inlet pipe, the detection gas inlet pipe is connected to the corresponding detection chamber through a first pipeline, the replacement gas inlet pipe is connected to the corresponding detection chamber through a second pipeline, and the exhaust pipe is connected to the detection chamber through a third pipeline, a flow valve is provided on the second pipeline, and a micro air pump and an exhaust valve are provided on the third pipeline.

2. An oxygen content detection device according to claim 1, characterized in that: It also includes an adsorption bottle, and two grooves are provided on the cover plate of the shell, and the adsorption bottle is placed in the grooves. Connectors connected to the adsorption bottle are provided at both ends of the grooves, and the connector at one end is connected to the first pipeline through a three-way regulating valve, and the other connector is connected to the detection chamber through a one-way valve.

3. An oxygen content detection device according to claim 2, characterized in that: A cover plate is fixed on the groove by means of bolts, and a detachable hoop sleeve for fixing the adsorption bottle is arranged in the groove.

4. The oxygen content detection device according to claim 1, characterized in that: A control panel and a switch button are provided at the front end of the shell. Two control panels are provided, corresponding to the two detection cavities respectively. The control panels are electrically connected to the control circuit board.

5. The oxygen content detection device according to claim 1, characterized in that: A power communication interface is provided on the rear side of the shell, and the power communication interface is electrically connected to the control circuit board.

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