Test calibration tool for gas detector
By designing a gas detector test and calibration tooling and adopting a base plate and pressure plate structure, simultaneous testing of multiple gas detectors is achieved, solving the problem of low detection efficiency in existing technologies and improving detection efficiency and standardization.
Patent Information
- Application Number
- CN202422884523.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-26
AI Technical Summary
In the prior art, the detection efficiency of the diffusion-type gas detector is low, and the gas injection caps need to be installed one by one, resulting in low detection efficiency.
A gas detector test and calibration tool is designed, including a base plate and a pressure plate. The base plate is provided with multiple workstation slots and air inlet holes. The air flow channel structure guides the gas into each workstation slot, and the pressure plate seals the air flow channel structure, which can test multiple gas detectors at the same time.
It improves the testing efficiency of gas detectors, realizes the simultaneous testing of multiple gas detectors, avoids gas escape, and ensures the standardization and efficiency of testing.
Smart Images
Figure CN223485964U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas detection technology, and more specifically, to a testing and calibration fixture for a gas detector. Background Technology
[0002] In the production process of gas detectors, testing with standard gases is a necessary step. Gas detectors use two detection methods: diffusion and pump-suction. For pump-suction detectors, a miniature pump is built into the detector to draw in the gas to be tested. The gas concentration is then measured by the internal gas sensor. For diffusion detectors, the gas diffuses naturally, and the concentration is measured by the internal gas sensor. According to national standards and verification procedures, when testing and calibrating a diffusion gas detector, it is necessary to connect an outlet pipe to the outlet of a standard gas cylinder, and then connect a dedicated gas filling cap to the free end of the outlet pipe. The gas filling cap needs to be installed in the gas chamber at the bottom of the gas detector. The gas in the standard gas cylinder will diffuse naturally to the gas chamber through the outlet pipe and the gas filling cap in sequence, so that the gas is reacted by the gas sensor and the concentration of the gas to be tested is measured. Since only one outlet pipe can usually be installed at the outlet of a standard gas cylinder, and only one gas filling cap can usually be installed at the free end of an outlet pipe, the gas filling cap needs to be installed on another gas detector after testing one gas detector, resulting in very low testing efficiency. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a gas detector testing and calibration fixture that can test multiple gas detectors simultaneously through a single gas outlet tube, thereby improving testing efficiency.
[0004] This utility model provides a gas detector testing and calibration fixture, including a base plate and a pressure plate. The lower surface of the base plate has a pressure plate groove for inserting and fixing the pressure plate. The upper surface of the base plate has multiple workstation grooves for inserting the gas detector. Each workstation groove has an air hole at its bottom that connects to the bottom of the pressure plate groove. The upper surface of the base plate also has an air inlet hole that connects to the bottom of the pressure plate groove and is used for air intake. The bottom of the pressure plate groove has an airflow channel structure, which is used to guide the air from the air inlet hole to the workstation groove. When the pressure plate is fixed in the pressure plate groove, it covers the airflow channel structure to form a seal.
[0005] Compared with existing technologies, the above-mentioned technical solution allows multiple gas detectors to be inserted one by one into the workstation slots on the upper surface of the base plate. Gas is then injected through the air inlet, and the gas flows through the airflow channel structure to each air hole and into each workstation slot. After the gas is reacted by the gas sensor, the concentration of the gas to be tested is measured. The pressure plate can prevent gas from escaping from the airflow channel structure and affecting the test. This solution can test multiple gas detectors simultaneously, improving testing efficiency.
[0006] In one possible implementation, the workstation slots are arranged in a multi-row, multi-column array.
[0007] Compared with existing technologies, the above technical solution allows the gas detector to be placed neatly, facilitating standardized testing.
[0008] In one possible implementation, there are 16 workstation slots arranged in a 4x4 array.
[0009] Compared with existing technologies, the above technical solution can ensure a certain level of testing efficiency in actual testing and facilitate standardized testing.
[0010] In one possible implementation, each workstation slot is divided into four groups, each group arranged in a row-column array; the airflow channel structure includes four X-shaped airflow channels, a first airflow channel, a second airflow channel, a third airflow channel, and a fourth airflow channel; the four X-shaped airflow channels are located directly below the positions of the four workstation slots, and the four ends of each X-shaped airflow channel are connected to the four air holes in the workstation slot of that group; the two ends of the first and second airflow channels are connected to the central intersection of the four X-shaped airflow channels; one end of the third airflow channel is connected to the air inlet, and the other end is connected to the first airflow channel; one end of the fourth airflow channel is connected to the air inlet, and the other end is connected to the second airflow channel.
[0011] Compared with existing technologies, the airflow channel structure using the above technical solution allows gas to flow smoothly to each air hole and into each work station slot, making it less likely to cause interference that affects the test results.
[0012] In one possible implementation, the depth of the pressure plate groove is matched with the thickness of the pressure plate, so that when the pressure plate is placed in the pressure plate groove, the lower surface of the pressure plate is flush with the lower surface of the base plate.
[0013] Compared with existing technologies, the above technical solution is easier to place on a flat surface for testing and is less likely to cause gas escape.
[0014] In one possible implementation, the vents are all offset from the center of the work station slot.
[0015] Compared with existing technologies, the above technical solution can avoid the gas entering directly impacting the gas detector and causing a sudden violent reaction. At the same time, it is beneficial for the gas to be discharged through the gap between the gas detector and the work station tank after it enters the gas detector.
[0016] In one possible implementation, the air holes are all set 3mm off the center of the work station groove.
[0017] Compared with existing technologies, the above technical solution can effectively avoid the gas entering directly impacting the gas detector and causing a sudden violent reaction. At the same time, it is beneficial for the gas to be discharged through the gap between the gas detector and the work station tank after it enters the gas detector.
[0018] In one possible implementation, the pressure plate has a plurality of first screw holes, and the bottom of the pressure plate groove has second screw holes that correspond one-to-one with the screw holes, so that the pressure plate can be fixed in the pressure plate groove by screws.
[0019] Compared with existing technologies, the above technical solution can stably fix the pressure plate, prevent gas escape, and is detachable for easy use.
[0020] In one possible implementation, both the base plate and the pressure plate are made of ABS plastic.
[0021] Compared with existing technologies, the materials using the above-mentioned technical solutions are lighter, easier to use, have sufficient hardness for testing, are low in cost, and are easy to manufacture. Attached Figure Description
[0022] Figure 1 It is a three-dimensional schematic diagram of the utility model;
[0023] Figure 2 This is a schematic diagram of the workstation groove and air hole of this utility model;
[0024] Figure 3 This is a schematic diagram of the airflow channel structure of this utility model;
[0025] Figure 4 This is a schematic diagram illustrating the use of this utility model;
[0026] Explanation of reference numerals in the attached figures:
[0027] 1-Base plate, 2-Pressure plate, 3-X-shaped airflow channel groove, 4-First airflow channel groove, 5-Second airflow channel groove, 6-Third airflow channel groove, 7-Fourth airflow channel groove, 11-Station groove, 12-Air inlet, 21-Pressure plate groove, 22-First screw hole, 100-Gas detector, 101-Connector, 103-Screw, 111-Air hole, 211-Second screw hole. Detailed Implementation
[0028] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0029] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0030] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0031] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0032] As attached Figure 1 and attached Figure 2 As shown in the embodiment of this application, a gas detector testing and calibration fixture is disclosed, including a base plate 1 and a pressure plate 2. The lower surface of the base plate 1 has a pressure plate groove 21 for the pressure plate 2 to be inserted and fixed. The upper surface of the base plate 1 has a plurality of work station grooves 11 for the gas detector 100 to be inserted. Each work station groove 11 has an air hole 111 at the bottom of the groove, which is connected to the bottom of the pressure plate groove 21. The upper surface of the base plate 1 also has an air inlet hole 12 that is connected to the bottom of the pressure plate groove 21 and is used for air intake. The bottom of the pressure plate groove 21 has an airflow channel groove structure, which is used to guide the air from the air inlet hole 12 to the air hole 111 and into the work station groove 11. When the pressure plate 2 is fixed in the pressure plate groove 21, it covers the airflow channel groove structure to form a seal.
[0033] Specifically, attached Figure 2Figure a shows a schematic diagram of the upper surface of the base plate 1, and Figure b shows a cross-sectional view of the base plate 1. In this embodiment, both the base plate 1 and the pressure plate 2 are cuboid structures. Since the gas detector 100 is cylindrical, the work station slots 11 are also cylindrical structures, and the diameter of the work station slots 11 is slightly larger than the diameter of the gas detector 100, so that the gas detector 100 can be inserted into the work station slots 11, and the gas can be discharged from the gap between the gas detector 100 and the work station slots 11 after testing. The airflow channel structure can be flexibly adjusted according to the number of work station slots 11. The air inlet 12 can be connected to the gas pipe and the standard gas cylinder through a special connector 101 for inflation. When the pressure plate 2 is fixed, it is pressed into the pressure plate slot 21 to cover the airflow channel structure and form a seal to prevent the gas in the airflow channel structure from escaping and affecting the test. When in use, as shown in the attached... Figure 4 As shown, multiple gas detectors 100 are inserted one by one into the work station slots 11 on the upper surface of the base plate 1. Then, gas is injected through the air inlet 12. The gas flows through the airflow channel structure to each air hole 111 and into each work station slot 11. The gas concentration is then measured by the gas sensor inside the gas detector 100 to achieve the test. This embodiment can test multiple gas detectors 100 at the same time, improving the testing efficiency.
[0034] In some embodiments, the workstation slots 11 are arranged in an array of multiple rows and columns. Those skilled in the art can flexibly adjust the number of workstation slots 11 and the number of rows and columns according to the size of the base plate 1, so that the gas detector 100 is placed neatly and facilitates standardized testing.
[0035] In some embodiments, there are 16 workstation slots 11 arranged in a 4x4 array. The 16 workstation slots 11 arranged in a 4x4 array can ensure a certain level of testing efficiency in actual testing and facilitate standardized testing.
[0036] As attached Figure 2 and attached Figure 3 As shown, in some embodiments, the 16 workstation slots 11 are evenly divided into four groups, each group arranged in a 2x2 array; the airflow channel structure includes four X-shaped airflow channel slots 3, a first airflow channel slot 4, a second airflow channel slot 5, a third airflow channel slot 6, and a fourth airflow channel slot 7; the four X-shaped airflow channel slots 3 are located directly below the positions of the four groups of workstation slots 11, and the four ends of each X-shaped airflow channel slot 3 are connected to the four air holes 111 in that group of workstation slots 11; the two ends of the first airflow channel slot 4 and the second airflow channel slot 5 are connected to the central intersection of the four X-shaped airflow channel slots 3; one end of the third airflow channel slot 6 is connected to the air inlet 12, and the other end is connected to the first airflow channel slot 4; one end of the fourth airflow channel slot 7 is connected to the air inlet 12, and the other end is connected to the second airflow channel slot 5. In this embodiment, each group of workstation slots 11 is as shown in the attached figure. Figure 2As shown in the dashed box in Figure a, the first airflow channel 4 and the second airflow channel 5 are vertically opened on the left and right sides of the bottom of the pressure plate channel 21, respectively. The third airflow channel 6 and the fourth airflow channel 7 are both opened in the left and right directions, so that the first airflow channel 4, the second airflow channel 5, the third airflow channel 6 and the fourth airflow channel 7 form an "H" shaped structure. This airflow channel structure allows the gas to flow smoothly to each air hole 111 and into each station channel 11, and it is not easy for interference to affect the test results.
[0037] In some embodiments, the depth of the pressure plate groove 21 matches the thickness of the pressure plate 2, so that when the pressure plate 2 is placed in the pressure plate groove 21, the lower surface of the pressure plate 2 is flush with the lower surface of the base plate 1. This facilitates testing on a flat surface and reduces the likelihood of gas escape.
[0038] In some embodiments, the vents 111 are all offset from the center of the work station trough 11. This avoids the incoming gas from directly impacting the gas detector 100 and causing a sudden and violent reaction, while also facilitating the gas to exit through the gap between the gas detector 100 and the work station trough 11 after it has passed through the gas detector 100.
[0039] In some embodiments, the vents 111 are all offset from the center of the work station trough 11 by 3 mm. The 3 mm offset of the vents 111 effectively avoids the incoming gas from directly impacting the gas detector 100 and causing a sudden violent reaction. At the same time, it facilitates the gas to be discharged through the gap between the gas detector 100 and the work station trough 11 after passing through the gas detector 100.
[0040] In some embodiments, the pressure plate 2 has a plurality of first screw holes 22, and the bottom of the pressure plate groove 21 has second screw holes 211 corresponding to the screw holes 22 one by one, so that the pressure plate 2 can be fixed in the pressure plate groove 21 by screws 103. This can stably fix the pressure plate 2, prevent gas from escaping, and is detachable for convenient use.
[0041] In some embodiments, both the base plate 1 and the pressure plate 2 are made of ABS plastic. ABS plastic is lightweight, easy to use, and has sufficient hardness for testing. It is also low in cost, easy to manufacture, and can be directly injection molded. In the description of the embodiments of this application, it should be noted that the terms "inner," "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.
[0042] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A gas detector testing and calibration fixture, characterized in that, The device includes a base plate (1) and a pressure plate (2). The lower surface of the base plate (1) is provided with a pressure plate groove (21) for the pressure plate (2) to be placed and fixed. The upper surface of the base plate (1) is provided with a plurality of workstation grooves (11) for the gas detector (100) to be inserted. Each workstation groove (11) has an air hole (111) at the bottom that connects to the bottom of the pressure plate groove (21). The upper surface of the base plate (1) is also provided with an air inlet hole (12) that connects to the bottom of the pressure plate groove (21) and is used for air intake. The bottom of the pressure plate groove (21) is provided with an airflow channel structure, which is used to guide the air from the air inlet hole (12) to the air hole (111) and into the workstation groove (11). When the pressure plate (2) is fixed in the pressure plate groove (21), it covers the airflow channel structure to form a seal.
2. The gas detector testing and calibration fixture according to claim 1, characterized in that, The workstation slots (11) are arranged in an array of multiple rows and columns.
3. The gas detector testing and calibration fixture according to claim 2, characterized in that, There are 16 workstation slots (11) arranged in an array of 4 rows and 4 columns.
4. The gas detector testing and calibration fixture according to claim 3, characterized in that, The 16 workstation slots (11) are divided into four groups, each group arranged in a 2-row, 2-column array. The airflow channel structure includes four X-shaped airflow channels (3), a first airflow channel (4), a second airflow channel (5), a third airflow channel (6), and a fourth airflow channel (7). The four X-shaped airflow channels (3) are located directly below the four groups of workstation slots (11), and the four ends of each X-shaped airflow channel (3) are connected to the four air holes (111) in the workstation slot (11) of that group. The two ends of the first airflow channel (4) and the second airflow channel (5) are connected to the central intersection of the four X-shaped airflow channels (3). One end of the third airflow channel (6) is connected to the air inlet (12), and the other end is connected to the first airflow channel (4). One end of the fourth airflow channel (7) is connected to the air inlet (12), and the other end is connected to the second airflow channel (5).
5. The gas detector testing and calibration fixture according to claim 1, 2, 3 or 4, characterized in that, The depth of the pressure plate groove (21) matches the thickness of the pressure plate (2), so that when the pressure plate (2) is placed in the pressure plate groove (21), the lower surface of the pressure plate (2) is flush with the lower surface of the base plate (1).
6. The gas detector testing and calibration fixture according to claim 1, 2, 3 or 4, characterized in that, The air holes (111) are all offset from the center of the work station groove (11).
7. The gas detector testing and calibration fixture according to claim 6, characterized in that, The air holes (111) are all set 3mm away from the center of the work station groove (11).
8. The gas detector testing and calibration fixture according to claim 1, 2, 3, 4 or 7, characterized in that, The pressure plate (2) has multiple first screw holes (22), and the bottom of the pressure plate groove (21) has second screw holes (211) that correspond one-to-one with the screw holes (22), so that the pressure plate (2) can be fixed in the pressure plate groove (21) by screws (103).
9. The gas detector testing and calibration fixture according to claim 1, 2, 3, 4 or 7, characterized in that, Both the base plate (1) and the pressure plate (2) are made of ABS plastic.