Calibration read-back tool of gas detector

Abstract

The utility model provides a calibration read-back tool of a gas detector. The calibration read-back tool comprises a gas source; the gas distributor comprises a first gas inlet and a plurality of first gas outlets, and the first gas inlet is connected with the gas source; each standard gas hood comprises a cavity, a second gas inlet, a second gas outlet and a connecting port, the second gas inlet, the second gas outlet and the connecting port are communicated with the cavity, and the connecting ports are configured to be suitable for being connected with the gas detectors; and each group of flow meters and valves are connected in series between the corresponding first air outlet and the corresponding second air inlet. According to the calibration backward-reading tool, the gas distributor with the plurality of first gas outlets is arranged in the calibration backward-reading tool, and the corresponding calibration gas cover and the flowmeter are arranged for each first gas outlet of the gas distributor, so that the calibration backward-reading tool can perform calibration or backward-reading operation on the plurality of gas detectors, and the calibration / backward-reading efficiency of the gas detectors can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas detector calibration / reading back technical field, especially a kind of gas detector's calibration reading back tool. BACKGROUND

[0002] Gas detector plays a vital role in the industry and safety field, it can accurately detect the concentration of harmful gas, flammable gas or other specific gas in air, provide critical safety information for operator, so as to ensure the safety and stability of working environment. In order to ensure the accuracy and reliability of gas detector, it needs to be calibrated and read back regularly. Calibration refers to the calibration of detector by known concentration of standard gas, to ensure that the detector can accurately measure the concentration of target gas. Reading back refers to checking whether the reading of detector after calibration is consistent with the known concentration of standard gas, to verify the effect of calibration and the accuracy of detector.

[0003] At present, the calibration reading back equipment commonly seen in market can only calibrate or read back one gas detector at a time, which is inefficient in the face of a large number of gas detectors needing calibration or reading back. For example, in large industrial facilities, hundreds of gas detectors may need to be maintained regularly, and the existing equipment cannot meet the high efficiency requirement, resulting in prolonged maintenance period and increased labor and time cost.

[0004] The content of the background section merely represents the knowledge of the inventor at the time of filing, and does not necessarily represent the state of the art in the field. UTILITY MODEL CONTENT

[0005] In view of one or more defects in the prior art, the utility model provides a kind of calibration reading back tool of gas detector, comprising:

[0006] Gas source;

[0007] Gas distributor, including first air inlet and multiple first air outlets, the first air inlet is connected with the gas source;

[0008] Multiple gas calibration covers, the gas calibration cover includes chamber and second air inlet, second air outlet and connecting port communicated with the chamber, the connecting port is configured to be suitable for connecting the gas detector;And

[0009] Multiple sets of flowmeter and valve, wherein each set of flowmeter and valve is connected in series between corresponding first air outlet and second air inlet.

[0010] According to one aspect of the utility model, the gas source is gas cylinder.

[0011] According to one aspect of the utility model, the connecting port of the gas calibration cover is provided with thread.

[0012] According to one aspect of the present application, the gas calibration cover is provided with a gas flow direction indicating mark.

[0013] According to one aspect of the present application, the flow meter is provided with a switch configured to control the opening and closing of the flow meter.

[0014] According to one aspect of the present application, the calibration and reading tool further comprises a pressure reducing valve connected between the gas source and the first gas inlet of the gas distributor.

[0015] According to one aspect of the present application, the calibration and reading tool further comprises a box, the gas distributor is arranged in the box, and the flow meter and the valve are installed on the outer side wall of the box.

[0016] According to one aspect of the present application, the box comprises a first side plate and a second side plate, wherein the flow meter and the valve are installed on the first side plate, the second side plate is provided with an air inlet connector and a plurality of air outlet connectors, the air inlet connector is connected with the gas source and the first air inlet respectively, the air outlet connector is connected with the second air inlet of the gas calibration cover, and the air outlet connector is further connected with the corresponding valve or flow meter.

[0017] According to one aspect of the present application, the box further comprises a frame, the first side plate is connected to the front side of the frame, and the second side plate is connected to the rear side of the frame.

[0018] According to one aspect of the present application, the box further comprises:

[0019] a third side plate connected to the left side of the frame;

[0020] a fourth side plate connected to the right side of the frame;

[0021] a fifth side plate connected to the upper side of the frame;

[0022] a sixth side plate connected to the lower side of the frame;

[0023] Among them, the first side plate, the second side plate, the third side plate, the fourth side plate, the fifth side plate and the sixth side plate jointly define a containing cavity.

[0024] According to one aspect of the present application, the third side plate and / or the fourth side plate are provided with air holes.

[0025] According to one aspect of the present application, the calibration and reading tool further comprises a gas recovery device connected with the second air outlet of each gas calibration cover.

[0026] Compared with the prior art, the embodiment of the utility model provides a kind of calibration back read tool of gas detector, wherein, by being provided with the gas distributor with multiple first gas outlets in calibration back read tool, and the corresponding gas standard cover and flowmeter are set for each first gas outlet of gas distributor, so that calibration back read tool can be calibrated or back read operation to multiple gas detectors, it is favorable to improve the calibration / back read efficiency of gas detector, reduce test time. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the utility model, and constitute part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation to the utility model.In the drawings:

[0028] Figure 1 The schematic diagram of calibration back read tool of gas detector according to one embodiment of the utility model is shown;

[0029] Figure 2 The rear view of gas standard cover according to one embodiment of the utility model is shown;

[0030] Figure 3 The sectional view of gas standard cover according to one embodiment of the utility model is shown;

[0031] Figure 4 The front view of gas standard cover according to one embodiment of the utility model is shown;

[0032] Figure 5 The explosion diagram of partial structure of calibration back read tool according to one embodiment of the utility model is shown.

[0033] In the drawing:100, calibration back read tool;110, gas source;120, gas distributor;121, first gas inlet;122, first gas outlet;130, gas standard cover;131, second gas inlet;132, second gas outlet;133, connecting port;134, gas flow direction indicating mark;140, flowmeter;141, switch;150, valve;160, pressure reducing valve;170, box;171, first side plate;172, second side plate;173, third side plate;174, fourth side plate;175, fifth side plate;176, sixth side plate;177, frame;178, air hole;180, gas inlet connector;190, gas outlet connector. DETAILED DESCRIPTION

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For the purpose of simplifying the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0039] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not intended to limit the present application. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not intended to limit the present application.

[0040] Figure 1 A schematic view of a calibration readback tool 100 of a gas detector according to an embodiment of the present application is shown, which will be described in detail below in conjunction with Figure 1 .

[0041] As shown in Figure 1 , the calibration readback tool 100 includes a gas source 110, a gas distributor 120, a plurality of calibration gas covers 130, and a plurality of sets of flow meters 140 and valves 150. The gas source 110 is used to provide calibration gas with known composition and concentration. The gas distributor 120 is connected to the gas source 110 and is used to divide the calibration gas into multiple branches for output. Specifically, the gas distributor 120 is provided with a first gas inlet 121 and a plurality of first gas outlets 122, wherein the first gas inlet 121 is in communication with each first gas outlet 122 and is connected to the gas source 110. Figure 2 A rear view of the calibration gas cover 130 according to an embodiment of the present application is shown, Figure 3 A cross-sectional view of the calibration gas cover 130 according to an embodiment of the present application is shown, as Figure 2 and Figure 3As shown, the calibration gas cover 130 comprises a chamber and a second gas inlet 131, a second gas outlet 132 and a connecting port 133 which are in communication with the chamber, wherein the connecting port 133 is configured to be connected with the gas detector. The number of the calibration gas cover 130 is the same as the number of the group of the flow meter 140 and the valve 150, and each calibration gas cover 130 and each group of the flow meter 140 and the valve 150 correspond to a first gas outlet 122 of the gas distributor 120, and the flow meter 140 and the valve 150 are connected in series between the second gas inlet 131 of the corresponding calibration gas cover 130 and the first gas outlet 122 of the gas distributor 120. The flow meter 140 can detect the flow of the corresponding branch (i.e. the calibration gas flowing to the calibration gas cover 130), the valve 150 can control the opening and closing of the corresponding branch, and the calibration gas cover 130 can accurately introduce the calibration gas into the gas detector to ensure the accuracy of the calibration and the reading. Optionally, the first gas inlet 121 of the gas source 110 and the gas distributor 120 are connected and communicated through a gas guide pipe, and the flow meter 140 and the valve 150 are connected in series through the gas guide pipe between the second gas inlet 131 of the corresponding calibration gas cover 130 and the first gas outlet 122 of the gas distributor 120. Optionally, the gas guide pipe is a hose to facilitate connection.

[0042] When calibrating or reading the gas detector, first, the gas detector is tightly connected with the connecting port 133 of the calibration gas cover 130 to ensure that there is no leakage at the connection. Then, the gas source 110 and the valve 150 corresponding to the calibration gas cover 130 are opened, so that the calibration gas enters the chamber of the calibration gas cover 130 through the gas distributor 110, the flow meter 140 and the valve 150. During this process, the flow of the calibration gas is monitored in real time by the flow meter 140 to ensure that the flow of the calibration gas is within a set range, thereby ensuring the accuracy and reliability of the calibration or reading. Then, the calibration gas is detected by the gas detector, and the calibration or reading operation of the gas detector is performed. After the calibration or reading is completed, the gas source 110 and the valve 150 are closed, and the gas detector is disconnected from the calibration gas cover 130, thereby completing the entire calibration or reading process.

[0043] According to an embodiment of the present application, as shown in Figure 1 The gas source 110 can use a gas cylinder to facilitate the user to replace the calibration gas, meet the calibration / reading requirements of different gas detectors, and improve the applicability of the calibration and reading tool 100.

[0044] According to an embodiment of the present application, as shown in Figure 2 and Figure 3 A thread can be provided at the connecting port 133 of the calibration gas cover 130 to enable the calibration gas cover 130 to be threadedly connected with the gas detector. Through this design, the connection stability and airtightness of the calibration gas cover 130 and the gas detector can be improved, and the disassembly and assembly of the gas detector are facilitated, which is conducive to improving the calibration / reading efficiency of the gas detector.

[0045] Figure 4 A front view of the calibration gas cover 130 is shown according to an embodiment of the present application, as shown in the figure, a gas flow direction indicating mark 134 is arranged on the outer side of the calibration gas cover 130. The gas flow direction indicating mark 134 is used to indicate the flow direction of the calibration gas in the calibration gas cover 130, which facilitates the user to identify the second air inlet 131 and the second air outlet 132, and reduces the possibility of the calibration gas cover 130 being installed reversely. In some embodiments, as shown in the figure, the gas flow direction indicating mark 134 can be an arrow pointing from the second air inlet 131 to the second air outlet 132. Figure 4 Figure 4 According to an embodiment of the present application, as shown in the figure, the calibration read-back tool 100 can further include a pressure reducing valve 160 connected between the gas source 110 and the first air inlet 121 of the gas distributor 120. Optionally, the pressure reducing valve 160 is an adjustable pressure reducing valve, which facilitates the user to adjust the pressure of the calibration gas according to the actual use requirement, and thus ensures the accuracy of the calibration / read-back.

[0046] According to an embodiment of the present application, as shown in the figure, the calibration read-back tool 100 can further include a pressure reducing valve 160 connected between the gas source 110 and the first air inlet 121 of the gas distributor 120. Optionally, the pressure reducing valve 160 is an adjustable pressure reducing valve, which facilitates the user to adjust the pressure of the calibration gas according to the actual use requirement, and thus ensures the accuracy of the calibration / read-back. Figure 1 According to an embodiment of the present application, as shown in the figure, the calibration read-back tool 100 can further include a pressure reducing valve 160 connected between the gas source 110 and the first air inlet 121 of the gas distributor 120. Optionally, the pressure reducing valve 160 is an adjustable pressure reducing valve, which facilitates the user to adjust the pressure of the calibration gas according to the actual use requirement, and thus ensures the accuracy of the calibration / read-back.

[0047] Figure 1 According to an embodiment of the present application, as shown in the figure, the calibration read-back tool 100 can further include a pressure reducing valve 160 connected between the gas source 110 and the first air inlet 121 of the gas distributor 120. Optionally, the pressure reducing valve 160 is an adjustable pressure reducing valve, which facilitates the user to adjust the pressure of the calibration gas according to the actual use requirement, and thus ensures the accuracy of the calibration / read-back.

[0048] Figure 5 An exploded view of part of the structure of the calibration read-back tool 100 is shown according to an embodiment of the present application, as shown in the figure, the calibration read-back tool 100 can further include a box body 170 having a receiving cavity. In the specific embodiment, the flow meter 140 and the valve 150 are installed on the outer side wall of the box body 170, which facilitates the user to observe the indicated value on the flow meter 140, and facilitates the user to operate the flow meter 140 and the valve 150. In addition, the gas distributor 120 can be arranged in the box body 170, so that the box body 170 can provide protection for the gas distributor 120 and the related gas guide pipe (not shown in the figure), and reduce the possibility of damage to the gas distributor 120 and the gas guide pipe. Figure 5 According to an embodiment of the present application, as shown in the figure, the calibration read-back tool 100 can further include a pressure reducing valve 160 connected between the gas source 110 and the first air inlet 121 of the gas distributor 120. Optionally, the pressure reducing valve 160 is an adjustable pressure reducing valve, which facilitates the user to adjust the pressure of the calibration gas according to the actual use requirement, and thus ensures the accuracy of the calibration / read-back.

[0049] Figure 5 ​​​As shown, the box body 170 can include a first side plate 171 and a second side plate 172. The flow meter 140 and the valve 150 are installed outside the first side plate 171, and a plurality of through holes (not shown in the figure) are arranged on the first side plate 171 to avoid the first side plate 171 shielding the inlet / outlet air ports of the flow meter 140 and the valve 150. The second side plate 172 is provided with an air inlet connector 180 and a plurality of air outlet connectors 190, and the air inlet connector 180 and the air outlet connector 190 both penetrate the inner side and the outer side of the second side plate 172, wherein the air inlet connector 180 is connected with the air source 110 and the first air inlet 121 respectively, and the air outlet connector 190 is connected with the second air inlet 131 of the gas mask 130 and the valve 150 or the flow meter 140. Optionally, the air source 110 and the pressure reducing valve 160 are connected and communicated through the air guide pipe, the air inlet end of the air inlet connector 180 and the pressure reducing valve 160 are connected and communicated through the air guide pipe (in some embodiments, the air inlet end of the air inlet connector 180 and the pressure reducing valve 160 can also be directly connected), and the air outlet end of the air inlet connector 180 and the first air inlet 121 of the air distributor 120 are connected and communicated through the air guide pipe. Optionally, the air inlet end of the air outlet connector 190 is connected with the valve 150 or the flow meter 140 through the air guide pipe (for example, in the embodiment shown, the air inlet end of the air outlet connector 190 is connected with the valve 150 through the air guide pipe), and the air outlet end of the air outlet connector 190 is connected and communicated with the second air inlet 131 of the gas mask 130 through the air guide pipe. Figure 5

[0050] According to an embodiment of the utility model, as shown in the figure, Figure 5 The box body 170 can further include a third side plate 173, a fourth side plate 174, a fifth side plate 175 and a sixth side plate 176. The first side plate 171, the second side plate 172, the third side plate 173, the fourth side plate 174, the fifth side plate 175 and the sixth side plate 176 are connected with each other to define the accommodating cavity.

[0051] According to an embodiment of the utility model, as shown in the figure, Figure 5 The box body 170 can further include a frame 177, which can be a support structure made of metal rods or plastic rods, etc. The frame 177 is used to support the first side plate 171, the second side plate 172, the third side plate 173, the fourth side plate 174, the fifth side plate 175 and the sixth side plate 176, and improve the structural strength of the box body 170. Specifically, the first side plate 171 is connected to the front side of the frame 177, the second side plate 172 is connected to the rear side of the frame 177, the third side plate 173 is connected to the left side of the frame 177, the fourth side plate 174 is connected to the right side of the frame 177, the fifth side plate 175 is connected to the upper side of the frame 177, and the sixth side plate 176 is connected to the lower side of the frame 177.

[0052] According to an embodiment of the utility model, as shown in the figure,​Figure 5 As shown, the vent hole 178 can be arranged on the third side plate 173 and / or the fourth side plate 174.

[0053] According to one embodiment of the present application, the calibration read-back tool 100 can further comprise a gas recovery device connected with the second gas outlet 132 of each calibration gas cover 130, for recovering the calibration gas, so as to realize recycling of the calibration gas and avoid pollution of the environment.

[0054] Compared with the prior art, the embodiment of the present application provides a calibration read-back tool 100 of a gas detector, wherein the gas distributor 120 with multiple first gas outlets 122 is arranged in the calibration read-back tool 100, and the corresponding calibration gas cover 130 and flow meter 140 are arranged for each first gas outlet 122 of the gas distributor 120, so that the calibration read-back tool 100 can calibrate or read back multiple gas detectors, which is beneficial to improve the calibration / read-back efficiency of the gas detector. By arranging the adjustable pressure reducing valve between the gas source 110 and the gas distributor 120, the user can conveniently adjust the pressure of the calibration gas according to the actual use requirement, thereby ensuring the accuracy of calibration / read-back.

[0055] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A calibration readback fixture for a gas detector, characterized by, The calibration and reading tool comprises: a gas source; a gas distributor comprising a first gas inlet and a plurality of first gas outlets, the first gas inlet being connected to the gas source; a plurality of gas calibration hoods, each of the gas calibration hoods comprising a chamber, a second gas inlet, a second gas outlet and a connecting port, the second gas inlet and the second gas outlet being in communication with the chamber, the connecting port being configured to be connected to the gas detector; a plurality of sets of flow meters and valves, each set of flow meters and valves being connected in series between a corresponding first gas outlet and a second gas inlet. The gas source is a gas cylinder.

2. The calibration readback fixture of claim 1, wherein, The connecting port of the gas calibration hood is provided with a thread.

3. The calibration readback fixture of claim 1, wherein, The gas calibration hood is provided with a gas flow direction indicator.

4. The calibration readback fixture of claim 1, wherein, The flow meter is provided with a switch configured to control the opening and closing of the flow meter.

5. The calibration readback fixture of claim 1, wherein, The calibration and reading tool further comprises a pressure reducing valve connected between the gas source and the first gas inlet of the gas distributor.

6. The calibration readback tool of any of claims 1-5, wherein, The calibration and reading tool further comprises a box, the gas distributor is arranged in the box, and the flow meters and the valves are mounted on the outer side wall of the box.

7. The calibration readback tooling of any of claims 1-5, wherein, The box comprises a first side plate and a second side plate, wherein the flow meters and the valves are mounted on the first side plate, the second side plate is provided with a gas inlet connector and a plurality of gas outlet connectors, the gas inlet connector is connected to the gas source and the first gas inlet respectively, the gas outlet connectors are connected to the second gas inlets of the gas calibration hoods, and the gas outlet connectors are further connected to corresponding valves or flow meters.

8. The calibration readback fixture of claim 7, wherein, The box further comprises a frame, the first side plate is connected to the front side of the frame, and the second side plate is connected to the rear side of the frame.

9. The calibration readback fixture of claim 8, wherein, The box further comprises:

10. The calibration readback tool of claim 9, wherein, a third side plate connected to the left side of the frame; a fourth side plate connected to the right side of the frame; a fifth side plate connected to the upper side of the frame; a sixth side plate connected to the lower side of the frame; wherein the first side plate, the second side plate, the third side plate, the fourth side plate, the fifth side plate and the sixth side plate jointly define a receiving cavity. The third side plate and / or the fourth side plate are provided with air vents.

11. The calibration readback tool of claim 10, wherein, The calibration and reading tool further comprises a gas recovery device connected to the second gas outlet of each gas calibration hood.

12. The calibration readback tool of any of claims 1-5, wherein, ​

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