Gas detection device with filtering assembly

Abstract

The utility model relates to the technical field of gas filtering, in particular to a gas detection device with a filtering assembly, which comprises a junction box, a gas concentration detector, a gas filtering device, a flow adjusting device, a calibration gas valve and a gas collecting hood, one side of the junction box is in threaded connection with a gas outlet pipe, the junction box is communicated with the gas filtering device through the gas outlet pipe, the junction box is communicated with one side of the flow adjusting device through a gas guide pipe, and the other side of the flow adjusting device is communicated with the gas collecting hood through a gas guide pipe; to-be-detected gas is filtered through the filter box, the filter element is arranged in the filter cavity in the filter box, impurities, dust, particles and water contained in the gas can be effectively separated, and the water collected after filtration can be discharged through the drainage valve; and then the air pump enables the filtered gas to enter the gas concentration detector through the gas flowmeter for detection, so that the influence of impurities on detection is reduced, and the gas detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas filtering, in particular to a gas detection device with a filtering component. Background Art

[0002] The concentration of toxic and harmful gases in industrial production and agricultural breeding environments has an important impact on personnel safety and the quality of livestock and poultry meat. With the improvement of people's awareness of production safety and food safety, gas concentration detectors are widely used to monitor the concentration of toxic and harmful gases in the production environment, and then control them to improve production safety.

[0003] Existing gas concentration detectors are greatly affected by the use environment. Electronic components may malfunction in high dust and high humidity environments, resulting in inaccurate detection data. The utility model adds a filter device to the gas concentration detector to filter tiny dust particles and water vapor in the air, ensuring that the electronic components in the gas concentration detector are not affected by the environment, the detection data is accurate and reliable, and the service life of the gas concentration detector is extended, thereby controlling the gas concentration and improving production safety. Utility Model Content

[0004] The utility model provides a gas detection device with a filter assembly, which is used to solve the problems in the background technology by designing a gas concentration detector and a gas filter device.

[0005] The specific technical solution of the utility model is as follows:

[0006] A gas detection device with a filter assembly, comprising a junction box, a gas concentration detector, a gas filter, a flow regulating device, a calibration gas valve and a gas collecting hood;

[0007] An air outlet pipe is threadedly connected to one side of the junction box, and the junction box is connected to the gas filtering device through the air outlet pipe. A wire outlet is opened on the other side of the junction box, and a wire is arranged in the wire outlet, and the wire is electrically connected to the gas concentration detector. An air guide pipe is threadedly connected to the junction box below the wire outlet and on the junction box, and the junction box is connected to one side of the flow regulating device through the air guide pipe, and the other side of the flow regulating device is connected to the gas collecting hood through the air guide pipe.

[0008] A preferred technical solution, the junction box includes a box body and a box cover, the box body is located on one side of the air outlet pipe and is provided with an inlet; the inlet and outlet of the junction box adopt PG cable connectors with IP68 waterproof and dustproof grade, a sealing ring is provided between the box body and the box cover, the air inlet and the air outlet are airtight, and the junction box reaches IP66 waterproof and dustproof grade;

[0009] A plurality of air pumps are fixedly mounted at the bottom of the box body, such asFigure 2 As shown, the utility model preferably has two air pumps, a time relay is installed between the air pumps, and an air inlet hose and an air outlet hose are arranged inside the box body;

[0010] One end of the air inlet hose is connected to the air outlet pipe, and the other end is connected to the air inlets of multiple air pumps. One end of the air outlet hose is connected to the air guide pipe, and the other end is connected to the air outlets of multiple air pumps.

[0011] The gas concentration detector's inlet connector is a PG cable connector with an IP68 waterproof and dustproof rating. The cable passes through the junction box outlet and the gas concentration detector's inlet connector respectively. One end is connected to the gas concentration detector's power terminal, and the other end is connected to the terminal inside the junction box. The gas concentration detector's air inlet end is threadedly connected to the gas collecting hood and is equipped with a sealing ring.

[0012] A preferred technical solution, the gas filtering device comprises a filter box, an air intake assembly and a drain valve;

[0013] A base for support is installed at the bottom of the filter box, a filter chamber is arranged inside the filter box, top covers are installed at the upper and lower ends of the filter chamber respectively, an air inlet joint and an air outlet joint are installed on the upper end top cover of the filter chamber respectively, and the air outlet joint is connected with the air outlet pipe; the drain valve is installed on the lower end top cover of the filter chamber.

[0014] A preferred technical solution is that the air intake assembly includes an air intake valve and an air intake pipe, one end of the air intake pipe is threadedly connected to the air intake valve, and the other end is threadedly connected to the air intake joint on the top cover.

[0015] A preferred technical solution, the flow regulating device includes a gas flow meter and a flow regulating valve, the air inlet and the air outlet of the gas flow meter are respectively connected to the air guide pipe, and the air outlet of the gas flow meter is connected to the gas collecting hood through the air guide pipe;

[0016] The flow regulating valve is located on the air guide pipe at one side of the air inlet of the gas flow meter and is communicated with the air guide pipe.

[0017] The air pump's gas outlet flow rate is 3L / min, and the gas concentration detector's required flow rate is generally 0.5L / min. The flow regulating valve is used to discharge excess flow gas to ensure the service life of the air pump and gas flow meter.

[0018] According to a preferred technical solution, the calibration gas valve is threadedly connected to the gas collecting hood, and an exhaust port is provided on the side of the gas collecting hood.

[0019] A preferred technical solution is that the box cover is provided with a power switch to control the working state of the device.

[0020] A preferred technical solution is that the filter cavity shell is made of transparent material; transparent materials such as glass and acrylic are used to facilitate observation of the water level in the cavity and the use of the filter material.

[0021] A preferred technical solution is that the gas concentration detector is filled with an elastic insulating moisture-proof resin for wrapping electronic components and circuit boards, and the elastic insulating moisture-proof resin is a flexible resin.

[0022] According to a preferred technical solution, the pipes used for ventilation between the junction box, the gas concentration detector, the gas filter device, the flow regulating device, the calibration gas valve and the gas collecting hood are all connected by an airtight threaded connection.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model filters the gas to be detected through a filter box, and a filter element is built in the filter cavity in the filter box, which can effectively separate impurities, dust, particles and moisture contained in the gas, and the moisture collected after filtering can be discharged through a drain valve, thereby ensuring the cleanliness of the gas, and then the air pump pumps the filtered gas into the air guide pipe through an air outlet hose, and then the filtered gas enters the gas collecting hood through a flow regulating valve and a gas flow meter, and then reaches the gas concentration detector through the gas collecting hood for detection, thereby reducing the influence of impurities on detection and improving the accuracy of gas detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the overall structural plan of the utility model;

[0026] Figure 2 It is a plan view of the internal structure of the junction box of the utility model;

[0027] Figure 3 It is a plan view of the filtering device of the utility model.

[0028] In the figure:

[0029] 1. Junction box; 11. Wire inlet; 12. Wire outlet; 13. Power switch; 14. Air pump; 15. Time relay; 16. Inlet hose; 17. Outlet hose; 2. Gas concentration detector; 3. Gas filter device; 31. Filter box; 311. Base; 312. Filter chamber; 313. Top cover; 314. Inlet connector; 315. Outlet connector; 32. Inlet assembly; 33. Drain valve; 4. Flow regulating device; 41. Gas flow meter; 42. Flow regulating valve; 5. Calibration gas valve; 6. Gas collecting hood; 7. Outlet pipe; 8. Air guide pipe. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0031] like Figure 1-3 As shown, a gas detection device with a filter assembly includes a junction box 1, a gas concentration detector 2, a gas filter 3, a flow regulating device 4, a calibration gas valve 5 and a gas collecting hood 6; because any instrument will produce a certain deviation after being used for a period of time, resulting in data error, the role of the calibration gas is to adjust the deviation, and the deviation can be adjusted through the calibration gas valve 5 to improve the accuracy of the data; the specific operation method is: when the instrument works normally for a period of time, the data may be abnormal, at this time, the flow regulating valve 42 or the gas flow meter 41 will be closed, and then the calibration gas will be injected through the calibration gas valve 5 to calibrate the gas detector;

[0032] The gas concentration detector 2 is filled with elastic insulating moisture-proof resin for wrapping electronic components and circuit boards, and the elastic insulating moisture-proof resin is a flexible resin;

[0033] The calibration gas valve 5 is threadedly connected to the gas collecting hood 6, and an exhaust port is provided on the side of the gas collecting hood 6;

[0034] An air outlet pipe 7 is threadedly connected to one side of the junction box 1, and the junction box 1 is connected to the gas filtering device 3 through the air outlet pipe 7. An outlet port 12 is provided on the other side of the junction box 1, and a wire is provided in the outlet port 12. The wire is electrically connected to the gas concentration detector 2. An air duct 8 is threadedly connected below the outlet port 12 and on the junction box 1. The junction box 1 is connected to one side of the flow regulating device 4 through the air duct 8, and the other side of the flow regulating device 4 is connected to the gas collecting hood 6 through the air duct 8.

[0035] The junction box includes a box body and a box cover. The box cover is provided with a power switch 13 to control the working state of the device. The box body is provided with a line inlet 11 on one side of the air outlet pipe 7. A plurality of air pumps 14 are fixedly installed at the bottom of the box body. Figure 2 As shown, the utility model preferably has two air pumps, a time relay 15 is installed between the air pumps 14, and an air inlet hose 16 and an air outlet hose 17 are arranged inside the box body;

[0036] During use, the number of air pumps 14 started can be adjusted according to the capacity of the gas to be detected. One or more air pumps 14 can be used at the same time. By using multiple air pumps 14 to work alternately, the service life of the air pumps 14 can be effectively increased.

[0037] One end of the air inlet hose 16 is connected to the air outlet pipe 7 , and the other end is connected to the air inlets of multiple air pumps 14 . One end of the air outlet hose 17 is connected to the air guide pipe 8 , and the other end is connected to the air outlets of multiple air pumps 14 .

[0038] As an embodiment of the present utility model, the gas filter device 3 includes a filter box 31, an air intake assembly 32 and a drain valve 33; the air intake assembly 32 includes an air intake valve and an air intake pipe, one end of the air intake pipe is threadedly connected to the air intake valve, and the other end is threadedly connected to the air intake connector 314 on the top cover 313;

[0039] A base 311 for support is installed at the bottom of the filter box 31, and a filter chamber 312 is arranged inside the filter box 31. The outer shell of the filter chamber 312 is made of transparent material, and top covers 313 are installed at the upper and lower ends of the filter chamber 312 respectively. An air inlet connector 314 and an air outlet connector 315 are installed on the upper top cover 313 of the filter chamber 312 respectively. The air outlet connector 315 is connected to the air outlet pipe 7, and the drain valve 33 is installed on the lower top cover 313 of the filter chamber 312.

[0040] As an embodiment of the utility model, the flow regulating device 4 includes a gas flow meter 41 and a flow regulating valve 42. The air inlet and the air outlet of the gas flow meter 41 are respectively connected to the air duct 8, and the air outlet of the gas flow meter 41 is connected to the gas collecting hood 6 through the air duct 8; the flow regulating valve 42 is located on the air duct 8 on the air inlet side of the gas flow meter 41 and is connected to the air duct 8.

[0041] Embodiment 1:

[0042] In this embodiment, under standard atmospheric pressure, if there is no positive pressure outside and no negative pressure inside, it is difficult for the gas to be detected to pass through when encountering resistance. The air pump 14 can form a negative pressure inside the device, making it easier for the external gas to be detected to enter the air pump 14 and then be transmitted to the gas concentration detector 2 for detection.

[0043] During specific operation, the external gas to be detected enters the filter box 31 through the air intake assembly 32. Due to the action of the air pump 14, the gas filtered in the gas filter device 3 is sucked into the air intake hose 16 through the air outlet pipe 7. Then the air pump 14 pumps the filtered gas into the air guide pipe 8 through the air outlet hose 17. Then the filtered gas enters the gas collecting hood 6 through the flow regulating valve 42 and the gas flow meter 41, and then reaches the gas concentration detector 2 through the gas collecting hood 6 for detection.

[0044] Among them, after the gas to be detected enters the gas filter device 3 through the air intake component 32, and the gas enters the filter box 31, the filter element is built in the filter cavity 312 in the filter box 31, which can effectively separate the impurities, dust, particles and moisture contained in the gas. The moisture collected after filtration can be discharged through the drain valve 33 (it can be drained manually or an automatic drainer can be installed for drainage).

[0045] It should be noted that after the air pump 14 pumps the gas into the air duct 8 through the air outlet hose 17, the flow regulating valve 42 is adjusted according to the reading of the gas flow meter 41 on the air duct 8 to prevent the gas flow into the gas concentration detector 2 from being too large and causing damage to the equipment.

[0046] The embodiments of the present invention are provided for the purpose of illustration and description, but are not intended to be exhaustive or to limit the present invention to the disclosed forms. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein.

Claims

1. A gas detection device having a filter assembly, characterized in that: It comprises a junction box (1), a gas concentration detector (2), a gas filtering device (3), a flow regulating device (4), a calibration gas valve (5) and a gas collecting hood (6); An air outlet pipe (7) is threadedly connected to one side of the junction box (1), and the junction box (1) is connected to the gas filter device (3) through the air outlet pipe (7). An outlet port (12) is provided on the other side of the junction box (1), and a wire is arranged in the outlet port (12), and the wire is electrically connected to the gas concentration detector (2). An air guide pipe (8) is threadedly connected below the outlet port (12) and on the junction box (1), and the junction box (1) is connected to one side of the flow regulating device (4) through the air guide pipe (8), and the other side of the flow regulating device (4) is connected to the gas collecting hood (6) through the air guide pipe (8).

2. A gas detection device with a filter assembly according to claim 1, characterized in that: The junction box comprises a box body and a box cover, and the box body is provided with a wire inlet (11) on one side of the air outlet pipe (7); A plurality of air pumps (14) are fixedly mounted on the bottom of the box body, a time relay (15) is mounted between the air pumps, and an air inlet hose (16) and an air outlet hose (17) are arranged inside the box body; One end of the air inlet hose (16) is connected to the air outlet pipe (7), and the other end is connected to the air inlet of multiple air pumps (14); one end of the air outlet hose (17) is connected to the air guide pipe (8), and the other end is connected to the air outlet of multiple air pumps (14).

3. A gas detection device with a filter assembly according to claim 1, characterized in that: The gas filtering device (3) comprises a filter box (31), an air intake assembly (32) and a drainage valve (33); A base (311) for support is installed at the bottom of the filter box (31); a filter chamber (312) is arranged inside the filter box (31); top covers (313) are installed at the upper and lower ends of the filter chamber (312); an air inlet joint (314) and an air outlet joint (315) are installed on the upper end top cover (313) of the filter chamber (312); the air outlet joint (315) is connected to the air outlet pipe (7); and the drain valve (33) is installed on the lower end top cover (313) of the filter chamber (312).

4. A gas detection device with a filter assembly according to claim 3, characterized in that: The air intake assembly (32) comprises an air intake valve and an air intake pipe, one end of the air intake pipe is threadedly connected to the air intake valve, and the other end of the air intake pipe is threadedly connected to the air intake connector (314) on the top cover (313).

5. A gas detection device with a filter assembly according to claim 1, characterized in that: The flow regulating device (4) comprises a gas flow meter (41) and a flow regulating valve (42); the gas inlet and the gas outlet of the gas flow meter (41) are respectively connected to the gas guide pipe (8); and the gas outlet of the gas flow meter (41) is connected to the gas collecting hood (6) via the gas guide pipe (8); The flow regulating valve (42) is located on the air guide pipe (8) at one side of the air inlet of the gas flow meter (41) and is in communication with the air guide pipe (8).

6. A gas detection device with a filter assembly according to claim 1, characterized in that: The calibration gas valve (5) is threadedly connected to the gas collecting hood (6), and an exhaust port is provided on the side of the gas collecting hood (6).

7. A gas detection device with a filter assembly according to claim 2, characterized in that: The box cover is provided with a power switch (13) to control the working state of the device.

8. A gas detection device with a filter assembly according to claim 3, characterized in that: The outer shell of the filter cavity (312) is made of transparent material.

9. A gas detection device with a filter assembly according to claim 1, characterized in that: The gas concentration detector (2) is filled with elastic insulating moisture-proof resin for wrapping electronic components and circuit boards, and the elastic insulating moisture-proof resin is a flexible resin.

10. A gas detection device with a filter assembly according to any one of claims 1 to 9, characterized in that: The pipelines used for ventilation between the junction box (1), the gas concentration detector (2), the gas filtering device (3), the flow regulating device (4), the calibration gas valve (5) and the gas collecting hood (6) are all connected in an airtight threaded connection manner.

Images