Automatic calibration device of environmental protection monitoring instrument

Abstract

The utility model discloses an automatic calibration device of an environmental protection monitoring instrument, which belongs to the technical field of poison gas detector calibration, and comprises an air duct component consisting of an arc-shaped pipeline and a straight pipeline, and the top of the straight pipeline on one side of the air duct component is provided with an exhaust port and a duplex gas transmission port. A mounting groove is formed in the outer side wall of the straight pipeline on the other side of the air duct assembly, and a calibration assembly is arranged in the mounting groove. According to the utility model, the internal circulating fan is arranged, so that the test gas can be driven to circulate in the air duct assembly, the gas flowing state of the poison gas detector in the actual use scene is restored, the effect of improving the calibration accuracy is realized, and toxic residues in the air duct and the detector are thoroughly removed through circulating purging of inert gas after calibration; through cooperation of the double-layer tray and multiple groups of test data lines, simultaneous connection and calibration of multiple poison gas detectors can be supported, the manual operation time is reduced, and the calibration efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of calibration technology for toxic gas detectors, and in particular to a calibration device for environmental monitoring instruments. Background Technology

[0002] Environmental monitoring instruments are various devices used to monitor environmental quality and its changing trends, including toxic gas detectors. After a period of use, the testing accuracy of toxic gas detectors will decrease, and they need to be calibrated using an automatic calibration device to ensure the testing accuracy for subsequent use. Existing automatic calibration devices require the testing personnel to connect the toxic gas detector to the automatic calibration device, then connect the test gas cylinder containing the toxic gas to the automatic calibration device, and finally perform automatic calibration.

[0003] However, this calibration method can only calibrate one toxic gas detector, resulting in low work efficiency and certain risks during operation. When disassembling the equipment after calibration, toxic gas may leak, affecting the health of the testing personnel.

[0004] At the same time, this calibration method differs from the actual usage of toxic gas detectors, resulting in poor calibration accuracy. Utility Model Content

[0005] The purpose of this invention is to solve the problems of potential toxic gas leakage during the calibration of toxic gas detectors in the prior art and the discrepancy between the calibration method and the actual use of the toxic gas detector. Therefore, an automatic calibration device for environmental monitoring instruments is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic calibration device for an environmental monitoring instrument includes a duct assembly consisting of an arc-shaped pipe and a straight pipe. The top of the straight pipe on one side of the duct assembly is provided with an exhaust port and a double air inlet. The outer wall of the straight pipe on the other side of the duct assembly is provided with an installation groove, and a calibration component is detachably connected in the installation groove.

[0008] The calibration assembly includes a sealing plate, on the side of the sealing plate facing the mounting groove, a double-layer tray and a sealing gasket are fixedly mounted, and on the side of the sealing plate away from the mounting groove, a handle is fixedly connected.

[0009] Preferably, an exhaust pipe is fixedly connected to the top of the exhaust port, and an inert gas pipe and a test gas pipe are fixedly connected to the top of the dual-port gas inlet.

[0010] Preferably, an internal circulation fan is fixedly installed inside the straight pipe.

[0011] Preferably, the four corners of the mounting groove are provided with limiting slots, and the limiting slots are provided with screw holes.

[0012] Preferably, the four corners of the sealing plate are fixedly connected with multiple limiting blocks with matching limiting slots, and each limiting block is detachably connected with a fastening screw, the size of which matches the screw hole.

[0013] Preferably, a data interface is provided on the side of the sealing plate away from the mounting groove, and a matching double-layer tray mounting block is fixedly installed on the side of the sealing plate facing the mounting groove. The mounting block is electrically connected to the data interface, and multiple test data lines are fixedly installed on the side wall of the mounting block. The test data lines are electrically connected to the mounting block.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting up an internal circulation fan, can drive the test gas to circulate within the air duct assembly after the test gas enters the air duct assembly, thus restoring the gas flow state in the actual use scenario of the toxic gas detector and improving the calibration accuracy. After calibration, the toxic residue in the air duct and detector is thoroughly removed by circulating inert gas, avoiding the threat to personnel health from toxic gas leakage.

[0016] 2. This utility model, through the combined use of a double-layer tray and multiple sets of test data cables, can support the simultaneous connection and calibration of multiple toxic gas detectors, reducing manual operation time and improving calibration efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an automatic calibration device for an environmental monitoring instrument proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of an automatic calibration device for an environmental monitoring instrument proposed in this utility model.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a structural assembly diagram of the calibration component in the automatic calibration device of an environmental monitoring instrument proposed in this utility model.

[0021] In the diagram: 1. Curved pipe; 2. Straight pipe; 3. Exhaust port; 4. Double gas inlet; 5. Mounting slot; 6. Sealing plate; 7. Double-layer tray; 8. Sealing gasket; 9. Handle; 10. Exhaust pipe; 11. Inert gas pipe; 12. Test gas pipe; 13. Internal circulation fan; 14. Limiting slot; 15. Limiting block; 16. Fastening screw; 17. Data interface; 18. Mounting block; 19. Test data cable. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1-4 An automatic calibration device for an environmental monitoring instrument includes a duct assembly consisting of an arc-shaped pipe 1 and a straight pipe 2. An exhaust port 3 and a double air inlet 4 are provided on the top of the straight pipe 2 on one side of the duct assembly. An installation groove 5 is provided on the outer wall of the straight pipe 2 on the other side of the duct assembly. A calibration component is detachably connected in the installation groove 5.

[0024] The calibration assembly includes a sealing plate 6, on the side of the sealing plate 6 facing the mounting groove 5, a double-layer tray 7 and a sealing gasket 8 are fixedly mounted, and on the side of the sealing plate 6 away from the mounting groove 5, a handle 9 is fixedly connected.

[0025] Furthermore, an exhaust pipe 10 is fixedly connected to the top of the exhaust port 3, and an inert gas pipe 11 and a test gas pipe 12 are fixedly connected to the top of the double gas inlet 4.

[0026] Furthermore, an internal circulation fan 13 is fixedly installed inside the straight pipe 2.

[0027] A further advantage of the above is that, through the coordinated use of the air duct assembly, exhaust port 3, dual air inlet 4, and internal circulation fan 13, when the test gas enters the air duct assembly, it is internally circulated under the action of the internal circulation fan 13, thereby simulating the flow of real gas. This makes the test environment close to the actual use of the toxic gas detector, improving the accuracy of calibration. After the test is completed, the test gas is extracted through the exhaust pipe 10, and at the same time, inert gas is introduced through the inert gas pipe 11 and circulated again, thus cleaning up residual toxic gas and avoiding the impact of toxic gas on the health of the test personnel during the test process.

[0028] Furthermore, limit slots 14 are provided at the four corners of the mounting groove 5, and screw holes are provided in the limit slots 14.

[0029] Furthermore, multiple limiting blocks 15 with matching limiting slots 14 are fixedly connected to the four corners of the sealing plate 6. Each limiting block 15 has a fastening screw 16 detachably connected inside. The size of the fastening screw 16 matches the screw hole. A data interface 17 is provided on the side of the sealing plate 6 away from the mounting groove 5. A mounting block 18 matching the double-layer tray 7 is fixedly installed on the side of the sealing plate 6 facing the mounting groove 5. The mounting block 18 is electrically connected to the data interface 17. Multiple test data lines 19 are fixedly installed on the side wall of the mounting block 18. The test data lines 19 are electrically connected to the mounting block 18.

[0030] A further advantage of the above approach is that multiple gas detectors can be connected to the test data cable 19 during testing. The connected gas detectors are placed on the surface of the double-layer tray 7, and then the sealing plate 6 is installed in the mounting slot 5. Automatic calibration can then be performed, achieving the effect of calibrating multiple gas detectors simultaneously.

[0031] It should be noted that the toxic gas detector is existing technology.

[0032] When using this utility model, the operator connects multiple gas detectors to the test data cable 19, places the connected gas detectors on the surface of the double-layer tray 7, then holds the handle 9 to move the calibration component to the mounting slot 5, so that the limiting block 15 engages with the limiting slot 14, then rotates the fastening screw 16 counterclockwise to install the sealing plate 6 in the mounting slot 5. At this time, the sealing gasket 8 achieves a sealing effect to prevent gas leakage. Finally, the data interface 17 is connected to the terminal device to complete the work preparation and achieve the effect of calibrating multiple gas detectors simultaneously.

[0033] During calibration, the test gas pipeline 12 introduces the test gas mixed with toxic gas into the air duct assembly through the double gas inlet 4. Then, the internal circulation fan 13 is started, so that the test gas can circulate internally within the air duct assembly, which realizes the effect of simulating real gas flow, making the test environment close to the actual use of the toxic gas detector, and improving the accuracy of calibration.

[0034] After calibration, the test gas is extracted through the exhaust pipe 10, while inert gas is introduced through the inert gas pipe 11. The internal circulation fan 13 continues to work and drives the internal circulation of inert gas. The internal circulation of inert gas is used to purge each toxic gas detector to avoid the residue of toxic substances, thus achieving the function of cleaning residual toxic gas and preventing toxic gas from affecting the health of test personnel during the test process.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic calibration device for an environmental monitoring instrument, comprising a duct assembly consisting of an arc-shaped pipe (1) and a straight pipe (2), characterized in that, An exhaust port (3) and a double air inlet (4) are provided at the top of the straight pipe (2) on one side of the air duct assembly. An installation groove (5) is provided on the outer wall of the straight pipe (2) on the other side of the air duct assembly. A calibration component is detachably connected in the installation groove (5). The calibration assembly includes a sealing plate (6), on which a double-layer tray (7) and a sealing gasket (8) are fixedly mounted on the side facing the mounting groove (5), and a handle (9) is fixedly connected to the side of the sealing plate (6) away from the mounting groove (5).

2. The automatic calibration device for an environmental monitoring instrument according to claim 1, characterized in that: The exhaust port (3) is fixedly connected to an exhaust pipe (10) at the top, and the double gas inlet (4) is fixedly connected to an inert gas pipe (11) and a test gas pipe (12) at the top.

3. The automatic calibration device for an environmental monitoring instrument according to claim 1, characterized in that: An internal circulation fan (13) is fixedly installed inside the straight pipe (2).

4. The automatic calibration device for an environmental monitoring instrument according to claim 1, characterized in that: The mounting groove (5) has a limit slot (14) at each of its four corners, and a screw hole is provided in the limit slot (14).

5. The automatic calibration device for an environmental monitoring instrument according to claim 1, characterized in that: The sealing plate (6) has multiple matching limiting blocks (15) with matching limiting slots (14) fixedly connected at its four corners. Each limiting block (15) has a fastening screw (16) detachably connected inside. The size of the fastening screw (16) matches the screw hole.

6. The automatic calibration device for an environmental monitoring instrument according to claim 1, characterized in that: A data interface (17) is provided on the side of the sealing plate (6) away from the mounting groove (5). A mounting block (18) matching the double-layer tray (7) is fixedly installed on the side of the sealing plate (6) facing the mounting groove (5). The mounting block (18) is electrically connected to the data interface (17). Multiple test data lines (19) are fixedly installed on the side wall of the mounting block (18). The test data lines (19) are electrically connected to the mounting block (18).

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