Concentration sensor testing equipment

Abstract

The utility model discloses concentration sensor testing equipment which comprises a pipe body with an airflow channel and a mounting seat matched with the pipe body, the airflow channel comprises a first channel and a second channel which are communicated with each other, and the mounting seat is communicated with the second channel; and the inner diameter of the first channel is smaller than that of the second channel at the communicating surface of the first channel and the second channel. When the concentration sensor testing equipment disclosed by the utility model is used, mixed gas flows through the first channel and the second channel in the pipe body through external gas guide equipment. Due to the fact that the inner diameters of the first channel and the second channel at the communicating position are different, the airflow speed can be changed, and the mixing effect of different gases is enhanced. Therefore, the concentration sensor testing equipment can improve the testing accuracy of the concentration sensor, and reduces the situation of misjudgment on the qualification condition of the sensor.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensor testing, and particularly relates to a concentration sensor testing device. Background Art

[0002] A concentration sensor is a device used to detect and measure the concentration of gases in the air, and is widely used in fields such as oil and gas recovery, environmental monitoring, industrial control, and vehicle emissions. It can provide gas concentration data in real time to help ensure safety and improve the environment. Before applying a concentration sensor, its performance and detection accuracy should be detected to ensure that the concentration sensor can accurately feedback the concentration value of the detected gas to meet the actual use requirements.

[0003] When detecting the accuracy of a concentration sensor, it is usually tested by simulating the daily working environment of the concentration sensor. For example, the concentration sensor is placed in a mixture of carbon dioxide and air, and then the sensor reading is compared with the concentration of carbon dioxide in the mixed gas. If the reading of the concentration sensor is consistent with the concentration of carbon dioxide in the mixed gas, it indicates that the sensor is qualified; if not, it indicates that the sensor is unqualified.

[0004] In the above technology, if the mixing effect of different gases is not sufficiently uniform, it may lead to the detection data of the concentration sensor being inconsistent with the gas mixing concentration, but at this time, it does not indicate that the sensor reading is incorrect.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a concentration sensor testing device. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a concentration sensor testing device, which can solve the problem of poor gas mixing effect in the above situation, resulting in misjudgment of the qualification of the sensor.

[0007] To achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0008] A concentration sensor testing device includes a tube body having an air flow channel and a mounting seat cooperatively installed with the tube body; the air flow channel includes a first channel and a second channel that are interconnected, and the mounting seat is in communication with the second channel; wherein, at the connection surface of the first channel and the second channel, the inner diameter of the first channel is smaller than the inner diameter of the second channel.

[0009] In one or more embodiments of the utility model, in the direction away from the second channel, the inner diameter of the first channel gradually increases.

[0010] In one or more embodiments of the present utility model, at least two pipe bodies are provided, one mounting seat is correspondingly arranged for one pipe body, and a connecting piece for connecting each other is arranged between two adjacent pipe bodies.

[0011] In one or more embodiments of the present utility model, the first channel includes channel segments respectively communicating with two ends of the second channel;

[0012] The connecting piece includes two connected connecting parts, the connecting parts are adapted to the shape of the first channel, outer walls of the two connecting parts respectively abut against inner walls of channel segments of two adjacent pipe bodies, and a third channel communicating with two adjacent pipe bodies is further defined in the connecting piece.

[0013] In one or more embodiments of the present utility model, the connecting piece further includes an abutting part, the abutting part protrudes from an outer wall at a connecting position of the two connecting parts, and the abutting part is used for abutting against end parts of the two pipe bodies close to each other.

[0014] In one or more embodiments of the present utility model, in a direction away from a connecting position of the connecting parts, an inner diameter of the third channel gradually decreases.

[0015] In one or more embodiments of the present utility model, one end of the connecting part inserted into the first channel extends into the second channel, and a length of the connecting part extending into the second channel is less than half of a length of the second channel.

[0016] In one or more embodiments of the present utility model, a sealing ring is arranged at a connecting surface between the connecting piece and the pipe body.

[0017] In one or more embodiments of the present utility model, the mounting seat includes a mounting plate and a mounting sleeve mounted on one side of the mounting plate, the mounting plate is fixedly connected with the pipe body, and a test hole communicating with the second channel is defined in the mounting plate, and the mounting sleeve is used for limiting and fixing a concentration sensor.

[0018] In one or more embodiments of the present utility model, a workbench is further included, and the pipe body is fixedly mounted on the workbench.

[0019] Compared with the prior art, when the concentration sensor testing device of the present utility model is in use, a mixed gas flows through the first channel and the second channel in the pipe body through an external air guiding device. Since an inner diameter of the first channel is smaller than an inner diameter of the second channel at a communicating surface between the first channel and the second channel, an air flow speed can be alternately changed, so that a mixing effect between different gases can be enhanced. Therefore, the concentration sensor testing device of the present utility model can improve the accuracy of testing a concentration sensor and reduce the situation of misjudging the qualified condition of the sensor. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of a concentration sensor testing device in an embodiment of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of a concentration sensor testing device in an embodiment of the present invention;

[0023] Figure 3 Is Figure 2 The enlarged schematic view at position A in;

[0024] Figure 4 It is a schematic cross-sectional view of a pipe body in an embodiment of the present invention.

[0025] Main reference numeral description:

[0026] 1. Pipe body; 11. First channel; 12. Second channel; 2. Mounting seat; 21. Mounting plate; 211. Test hole; 22. Mounting sleeve; 3. Connecting piece; 31. Connecting portion; 32. Abutting portion; 33. Third channel; 4. Sealing ring. Detailed Description of the Embodiments

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Referring to Figure 1 And Figure 2 , a concentration sensor testing device in an embodiment of the present invention includes a pipe body 1 having an air flow channel and a mounting seat 2 cooperatively installed with the pipe body 1. The air flow channel includes a first channel 11 and a second channel 12 that are interconnected, and the mounting seat 2 communicates with the second channel 12; wherein, at the connecting surface of the first channel 11 and the second channel 12, the inner diameter of the first channel 11 is smaller than the inner diameter of the second channel 12.

[0029] Reference Figure 3 As shown in Figure 3 , the mounting base 2 includes a mounting plate 21 and a mounting sleeve 22 mounted on one side of the mounting plate 21. The mounting plate 21 is fixedly connected to the pipe body 1 and is provided with a test hole 211 communicating with the second channel 12. The mounting sleeve 22 is used for limiting and fixing the concentration sensor.

[0030] During the test, the mixed gas is made to pass through the first channel 11 and the second channel 12 by an external gas guiding device. Since the inner diameters of the first channel 11 and the second channel 12 are different, the air flow velocity alternates, thus enhancing the gas mixing effect. After the gas is fully mixed in the air flow channel, the concentration sensor to be detected is then installed on the mounting base 2, so that misjudgment of the qualification of the concentration sensor can be reduced.

[0031] Reference Figure 4 As shown in Figure 4 , further, in the direction away from the second channel 12, the inner diameter of the first channel 11 gradually increases. The gas flows along the first channel 11, enters from the end with a larger inner diameter, and enters the second channel 12 from the end with a smaller inner diameter. During the flow of the gas in the first channel 11, due to the restriction of the inner wall of the first channel 11, different gases continuously approach each other during the flow, further enhancing the gas mixing effect.

[0032] Reference Figure 1 As shown in Figure 1 , at least two pipe bodies 1 are provided. One mounting base 2 is correspondingly provided for one pipe body 1, and a connecting piece 3 for connecting each other is provided between two adjacent pipe bodies 1. In this embodiment, three pipe bodies 1 are provided. In other embodiments, other numbers of pipe bodies 1 can also be set according to the test requirements of the sensor. In this embodiment, the pipe body 1 is designed in sections, and the staff can freely assemble the corresponding number of pipe bodies 1 according to the number of concentration sensors to be tested, so as to improve the detection efficiency of the concentration sensor.

[0033] Reference Figure 3 As shown in Figure 3 , the connecting piece 3 includes two connected connecting parts 31. Figure 4 As shown in Figure 4 , the first channel 11 includes channel segments respectively communicating with both ends of the second channel 12. The connecting part 31 is adapted to the shape of the first channel 11, and the outer walls of the two connecting parts 31 respectively abut against the inner walls of the channel segments of two adjacent pipe bodies 1. A third channel 33 communicating the two adjacent pipe bodies 1 is also provided in the connecting piece 3.

[0034] Therefore, the gas can flow through the air flow channel in the pipe body 1 and the third channel 33 in the connecting piece 3 in sequence, so as to ensure the air flow between the pipe bodies 1, facilitating the test of the concentration sensor on each pipe body 1. It can be understood that in this embodiment, the connecting part 31 is set in a conical shape according to the shape of the first channel 11. Since the connecting part 31 is set in a conical shape, the convenience of inserting the connecting piece 3 into the first channel 11 is improved.

[0035] Wherein, in the direction away from the connection position of the connecting portion 31, the inner diameter of the third channel 33 gradually decreases. The change in the inner diameter of the third channel 33 can further change the speed of the gas flowing through the third channel 33. By making the air flow speed change repeatedly, the gas can be further mixed within the connector 3.

[0036] It can be understood that in other embodiments, the inner diameters of all parts of the third channel 33 can also be the same, and it only needs to play the role of connecting the two pipes.

[0037] Refer to Figure 3 , one end of the connecting portion 31 inserted into the first channel 11 extends into the second channel 12, and the length of the connecting portion 31 extending into the second channel 12 is less than half of the length of the second channel 12. The circumferential side of the connecting portion 31 is in complete contact with the inner side of the first channel 11, thus increasing the friction between the connector 3 and the first channel 11, thereby increasing the firmness of the connection between the two pipe bodies 1; at the same time, the gas entering the second channel 12 may collide with the peripheral wall of the connecting portion 31, so that the mixing effect can be further improved. The setting of the length of the connecting portion 31 extending into the second channel 12 can reduce the possibility of the connecting portion 31 blocking the test hole 211.

[0038] Refer to Figure 3 , the connector 3 further includes an abutting portion 32, the abutting portion 32 protrudes from the outer wall of the connection position of the two connecting portions 31, and the abutting portion 32 is used to abut against the ends of the two pipe bodies 1 close to each other. The abutting portion 32 can limit the displacement of the connector 3 in two adjacent channel segments, reducing the possibility of the position of the connector 3 shifting. In this embodiment, the abutting portion 32 is set as a square ring.

[0039] Refer to Figure 3 , a sealing ring 4 is provided at the connection surface between the connector 3 and the pipe body 1. The sealing ring 4 can ensure the airtightness at the connection between the connector 3 and the pipe body 1, ensuring the accuracy of the test.

[0040] In this embodiment, the concentration sensor testing device further includes a workbench (not shown in the figure), and the pipe body 1 is fixedly installed on the workbench. By fixedly installing a plurality of pipe bodies 1 on the workbench, the shaking caused by the air flow passing through the pipe body 1 can be reduced, thereby reducing the possibility of separation between the pipe bodies.

[0041] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0042] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A concentration sensor testing device, characterized in that It includes a pipe body (1) having an air flow channel and a mounting base (2) cooperatively installed with the pipe body (1); the air flow channel includes a first channel (11) and a second channel (12) that are interconnected, and the mounting base (2) communicates with the second channel (12); wherein, at the connection surface between the first channel (11) and the second channel (12), the inner diameter of the first channel (11) is smaller than the inner diameter of the second channel (12).

2. The concentration sensor testing device according to claim 1, wherein In the direction away from the second channel (12), the inner diameter of the first channel (11) gradually increases.

3. The concentration sensor testing device according to claim 2, characterized in that At least two pipe bodies (1) are provided, one mounting base (2) is correspondingly provided for one pipe body (1), and a connecting piece (3) for connecting each other is provided between two adjacent pipe bodies (1).

4. The concentration sensor testing device according to claim 3, wherein, The first channel (11) includes channel segments respectively communicating with both ends of the second channel (12). The connecting piece (3) includes two interconnected connecting parts (31), the connecting parts (31) are adapted to the shape of the first channel (11), the outer walls of the two connecting parts (31) respectively abut against the inner walls of the channel segments of two adjacent pipe bodies (1), and a third channel (33) communicating with two adjacent pipe bodies (1) is further opened in the connecting piece (3).

5. The concentration sensor testing device according to claim 4, characterized in that, The connecting piece (3) further includes an abutting part (32), the abutting part (32) protrudes from the outer side wall at the connecting position of the two connecting parts (31), and the abutting part (32) is used for abutting against the ends of the two pipe bodies (1) close to each other.

6. The concentration sensor testing device according to claim 4, wherein In the direction away from the connecting position of the connecting parts (31), the inner diameter of the third channel (33) gradually decreases.

7. The concentration sensor testing device according to claim 4, wherein One end of the connecting part (31) inserted into the first channel (11) extends into the second channel (12), and the length of the connecting part (31) extending into the second channel (12) is less than half of the length of the second channel (12).

8. The concentration sensor testing device according to claim 3, characterized in that, A sealing ring (4) is provided at the connection surface between the connecting piece (3) and the pipe body (1).

9. The concentration sensor testing device according to claim 1, characterized in that, The mounting base (2) includes a mounting plate (21) and a mounting sleeve (22) mounted on one side of the mounting plate (21), the mounting plate (21) is fixedly connected to the pipe body (1), and is provided with a test hole (211) communicating with the second channel (12), and the mounting sleeve (22) is used for limiting and fixing a concentration sensor.

10. The concentration sensor testing device according to claim 1, characterized in that, It further includes a workbench, and the pipe body (1) is fixedly installed on the workbench.

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