Mixed gas concentration detection device

Abstract

The utility model discloses a mixed gas concentration detection device, which relates to the technical field of mixed gas detection, and comprises a main body unit, a gas inlet unit arranged at the input end of the main body unit, a vacuum unit arranged at the output end of the gas inlet unit, and a collection unit arranged in the main body unit, the pressure measuring unit is arranged above the main body unit; the air inlet unit comprises an air inlet pipe installed on the side wall of the main body unit, an adjusting valve arranged in the air inlet pipe, an air suction pipe installed at the input end of the air inlet pipe and an air suction fan arranged in the air suction pipe. According to the mixed gas concentration detection device disclosed by the utility model, the gas inlet unit and the pressure measuring unit are arranged, so that the gas pressure in the gas chamber is monitored in real time, and the accuracy of detection data is improved.

Description

Technical Field

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

[0002] After years of development, gas detection technology has entered a relatively mature stage. In recent years, there have been many models of portable or fixed gas detection instruments on the market that can be used to detect dangerous gases such as household gas and coal mine gas.

[0003] After searching the publication (announcement) number: CN214622534U, a mixed gas detection device based on multiple sensors is disclosed. An air inlet and an air outlet are provided on the air chamber. The suction fan is connected to the air inlet through an air inlet pipeline, and the vacuum pump is connected to the air outlet through an air outlet pipeline. A stop valve is provided on the air inlet pipeline and the air outlet pipeline. Multiple gas concentration sensors are arranged in an array on the inner wall of the air chamber. The data acquisition module is placed outside the air chamber. The alarm and multiple gas concentration sensors are connected to the data acquisition module, and the data acquisition module is connected to a PC. This device realizes mixed gas detection and has strong anti-interference and stability. The device has a simple structure and is easy to operate. You only need to open or close the stop valve to start detecting the gas concentration around the environment.

[0004] Although the above scheme realizes the detection of mixed gas and has strong anti-interference and stability, it is inconvenient to monitor the gas pressure entering the gas chamber in real time, resulting in certain errors in the obtained detection data. For this reason, we propose a mixed gas detection device based on multiple sensors. Utility Model Content

[0005] The main purpose of the utility model is to provide a mixed gas concentration detection device, which solves the problem of inconvenience in real-time monitoring of the gas pressure entering the gas chamber, resulting in certain errors in the obtained detection data, by setting an air intake unit and a pressure measuring unit.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A mixed gas concentration detection device comprises a main unit, an air intake unit arranged at an input end of the main unit, a vacuum unit arranged at an output end of the air intake unit, a collection unit arranged inside the main unit, and a pressure measuring unit arranged above the main unit;

[0008] The air intake unit comprises an air intake pipe installed on the side wall of the main unit, a regulating valve arranged in the air intake pipe, an air intake pipe installed at the input end of the air intake pipe, and an air intake fan arranged in the air intake pipe;

[0009] The pressure measuring unit comprises a pressure measuring tube installed on the top of the main unit, a pressure bearing member movably arranged in the pressure measuring tube, and a pressure display installed on the top of the pressure measuring tube.

[0010] Preferably, the main unit includes an air chamber, an exhaust hole opened at the top of the air chamber, and a sealing plug arranged in the exhaust hole.

[0011] Preferably, the regulating valve comprises a sealing plate movably arranged in the air intake pipe and a screwing handle installed on the side wall of the sealing plate.

[0012] Preferably, the pressure-bearing member comprises two pistons movably disposed in the pressure measuring tube, and a connecting rod installed between the two pistons.

[0013] Preferably, the vacuum unit comprises an exhaust pipe installed on a side wall of the air chamber, and a vacuum pump installed at an output end of the exhaust pipe.

[0014] Preferably, the vacuum unit further comprises a sealing valve movably arranged in the exhaust pipe.

[0015] Preferably, the acquisition unit includes a fixed plate installed on the bottom wall of the air chamber, a plurality of gas concentration sensors installed on the top of the fixed plate, a data acquisition module arranged outside the air chamber, an alarm installed on the top of the data acquisition module, and a conduction line arranged between the fixed plate and the data acquisition module.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the utility model, by providing the air intake unit and the pressure measuring unit, when it is necessary to detect the concentration of the mixed gas, first, the sealing plug is installed in the exhaust hole at the top of the air chamber, then the regulating valve is closed, and after the sealing valve is opened, the vacuum pump is started to evacuate the interior of the air chamber, and then the sealing valve is closed, the mixed gas is input from the input end of the air intake pipe, the suction fan is started, and the screwing handle is turned to release the sealing of the air intake pipe by the sealing plate, so that the mixed gas passes through the suction pipe and the air intake pipe and finally enters the interior of the air chamber. As more and more gas enters the interior of the air chamber, The greater the pressure in the air chamber, the more the gas will push up the piston and move it inside the pressure measuring tube. The greater the pressure, the higher the piston height. The pressure is displayed on the pressure display, thereby realizing real-time monitoring of the gas pressure in the air chamber and improving the accuracy of the detection data. When the mixed gas enters the air chamber, a variety of gas concentration sensors detect the gas concentration, and the detection data is input into the data acquisition module through the transmission line. When the gas content in the air chamber is high, the alarm will sound a signal to warn the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model viewed from above;

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0021] Figure 4 For this utility model Figure 3 A magnified schematic diagram of the structure of middle I;

[0022] Figure 5 For this utility model Figure 2 Schematic diagram of the cross-sectional structure at BB in the middle.

[0023] In the figure:

[0024] 1. Main unit; 101. Air chamber; 102. Sealing plug;

[0025] 2. Air intake unit; 201. Air intake pipe; 202. Regulating valve; 2021. Sealing plate; 2022. Screw handle; 203. Air intake pipe; 204. Air intake fan;

[0026] 3. Pressure measuring unit; 301. Pressure measuring tube; 302. Pressure bearing member; 3021. Piston; 3022. Connecting rod; 303. Pressure display;

[0027] 4. Vacuum unit; 401. Exhaust pipe; 402. Sealing valve; 403. Vacuum pump;

[0028] 5. Collection unit; 501. Fixing plate; 502. Multiple gas concentration sensors; 503. Data collection module; 504. Transmission line; 505. Alarm. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] Example 1

[0031] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, a mixed gas concentration detection device includes a main unit 1, an air intake unit 2 arranged at the input end of the main unit 1, a vacuum unit 4 arranged at the output end of the air intake unit 2, a collection unit 5 arranged inside the main unit 1, and a pressure measuring unit 3 arranged above the main unit 1;

[0032] like Figure 1 As shown, the air intake unit 2 includes an air intake pipe 201 installed on the side wall of the main unit 1, a regulating valve 202 arranged in the air intake pipe 201, an air intake pipe 203 installed at the input end of the air intake pipe 201, and an air intake fan 204 arranged in the air intake pipe 203. When the air intake fan 204 is working, external air can be quickly input into the air intake pipe 203;

[0033] like Figure 3 As shown, the pressure measuring unit 3 includes a pressure measuring tube 301 installed on the top of the main unit 1, a pressure bearing member 302 movably arranged in the pressure measuring tube 301, and a pressure display 303 installed on the top of the pressure measuring tube 301. The pressure display 303 can display the gas pressure to which the pressure bearing member 302 is subjected.

[0034] like Figure 1 As shown, the main unit 1 includes an air chamber 101, an exhaust hole opened at the top of the air chamber 101, and a sealing plug 102 arranged in the exhaust hole. The setting of the sealing plug 102 can prevent the gas in the air chamber 101 from being discharged from the exhaust hole.

[0035] like Figure 4 As shown, the regulating valve 202 includes a sealing plate 2021 movably arranged in the air intake pipe 201 and a screwing handle 2022 installed on the side wall of the sealing plate 2021. By rotating the screwing handle 2022, the sealing plate 2021 can be rotated, thereby achieving sealing and switching of the air intake pipe 201.

[0036] like Figure 3 As shown, the pressure bearing member 302 includes two pistons 3021 movably disposed in the pressure measuring tube 301 , and a connecting rod 3022 installed between the two pistons 3021 . The pistons 3021 are convenient for intuitively displaying the pressure changes in the pressure measuring tube 301 .

[0037] like Figure 2 As shown, the vacuum unit 4 includes an exhaust pipe 401 installed on the side wall of the air chamber 101, and a vacuum pump 403 installed at the output end of the exhaust pipe 401. The arrangement of the vacuum pump 403 facilitates evacuating the interior of the air chamber 101 into a vacuum.

[0038] like Figure 3 As shown, the vacuum unit 4 further includes a sealing valve 402 movably disposed in the exhaust pipe 401 . The arrangement of the sealing valve 402 facilitates the ventilation and sealing of the exhaust pipe 401 .

[0039] When it is necessary to detect the concentration of the mixed gas, first, install the sealing plug 102 into the exhaust hole at the top of the air chamber 101, then close the regulating valve 202, open the sealing valve 402, start the vacuum pump 403, evacuate the interior of the air chamber 101, then close the sealing valve 402, input the mixed gas from the input end of the air inlet pipe 201, start the suction fan 204, and turn the screw handle 2022 to release the sealing plate 2021 from the air inlet pipe 201, so that The mixed gas passes through the suction pipe 203 and the intake pipe 201 and finally enters the air chamber 101. As more gas enters the air chamber 101, the pressure in the air chamber 101 increases, causing the gas to continuously lift the piston 3021 and move inside the pressure measuring tube 301. The greater the pressure, the higher the height of the piston 3021. The pressure is displayed through the pressure display 303, thereby realizing real-time monitoring of the gas pressure in the air chamber 101 and improving the accuracy of the detection data.

[0040] Example 2

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, a mixed gas concentration detection device includes a main unit 1, an air intake unit 2 arranged at the input end of the main unit 1, a vacuum unit 4 arranged at the output end of the air intake unit 2, a collection unit 5 arranged inside the main unit 1, and a pressure measuring unit 3 arranged above the main unit 1;

[0042] like Figure 1 As shown, the air intake unit 2 includes an air intake pipe 201 installed on the side wall of the main unit 1, a regulating valve 202 arranged in the air intake pipe 201, an air intake pipe 203 installed at the input end of the air intake pipe 201, and an air intake fan 204 arranged in the air intake pipe 203. When the air intake fan 204 is working, external air can be quickly input into the air intake pipe 203;

[0043] like Figure 3 As shown, the pressure measuring unit 3 includes a pressure measuring tube 301 installed on the top of the main unit 1, a pressure bearing member 302 movably arranged in the pressure measuring tube 301, and a pressure display 303 installed on the top of the pressure measuring tube 301. The pressure display 303 can display the gas pressure to which the pressure bearing member 302 is subjected.

[0044] like Figure 1 As shown, the main unit 1 includes an air chamber 101, an exhaust hole opened at the top of the air chamber 101, and a sealing plug 102 arranged in the exhaust hole. The setting of the sealing plug 102 can prevent the gas in the air chamber 101 from being discharged from the exhaust hole.

[0045] like Figure 4 As shown, the regulating valve 202 includes a sealing plate 2021 movably arranged in the air intake pipe 201 and a screwing handle 2022 installed on the side wall of the sealing plate 2021. By rotating the screwing handle 2022, the sealing plate 2021 can be rotated, thereby achieving sealing and switching of the air intake pipe 201.

[0046] like Figure 3 As shown, the pressure bearing member 302 includes two pistons 3021 movably disposed in the pressure measuring tube 301 , and a connecting rod 3022 installed between the two pistons 3021 . The pistons 3021 are convenient for intuitively displaying the pressure changes in the pressure measuring tube 301 .

[0047] like Figure 2 As shown, the vacuum unit 4 includes an exhaust pipe 401 installed on the side wall of the air chamber 101, and a vacuum pump 403 installed at the output end of the exhaust pipe 401. The arrangement of the vacuum pump 403 facilitates evacuating the interior of the air chamber 101 into a vacuum.

[0048] like Figure 3 As shown, the vacuum unit 4 further includes a sealing valve 402 movably disposed in the exhaust pipe 401 . The arrangement of the sealing valve 402 facilitates the ventilation and sealing of the exhaust pipe 401 .

[0049] like Figure 5 As shown, the collection unit 5 includes a fixed plate 501 installed on the inner bottom wall of the gas chamber 101, a multi-gas concentration sensor 502 installed on the top of the fixed plate 501, a data collection module 503 arranged outside the gas chamber 101, an alarm 505 installed on the top of the data collection module 503, and a conduction line 504 arranged between the fixed plate 501 and the data collection module 503. The setting of the conduction line 504 can input the information collected by the multi-gas concentration sensor 502 into the data collection module 503 for display.

[0050] When the mixed gas enters the gas chamber 101, the gas concentration is detected by the multiple gas concentration sensors 502, and the detection data is input into the data acquisition module 503 through the transmission line 504. When the gas content in the gas chamber 101 is high, the alarm 505 explodes and sends a signal to warn the operator.

[0051] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A mixed gas concentration detection device, comprising a main unit (1), characterized in that: It also comprises an air intake unit (2) arranged at the input end of the main unit (1), a vacuum unit (4) arranged at the output end of the air intake unit (2), a collection unit (5) arranged inside the main unit (1), and a pressure measuring unit (3) arranged above the main unit (1); The air intake unit (2) comprises an air intake pipe (201) installed on the side wall of the main unit (1), a regulating valve (202) arranged in the air intake pipe (201), an air intake pipe (203) installed at the input end of the air intake pipe (201), and an air intake fan (204) arranged in the air intake pipe (203); The pressure measuring unit (3) comprises a pressure measuring tube (301) installed on the top of the main unit (1), a pressure bearing member (302) movably arranged in the pressure measuring tube (301), and a pressure display (303) installed on the top of the pressure measuring tube (301).

2. A mixed gas concentration detection device according to claim 1, characterized in that: The main body unit (1) comprises an air chamber (101), an exhaust hole opened at the top of the air chamber (101), and a sealing plug (102) arranged in the exhaust hole.

3. A mixed gas concentration detection device according to claim 2, characterized in that: The regulating valve (202) comprises a sealing plate (2021) movably arranged in the air intake pipe (201) and a screwing handle (2022) mounted on the side wall of the sealing plate (2021).

4. A mixed gas concentration detection device according to claim 3, characterized in that: The pressure-bearing member (302) comprises two pistons (3021) movably arranged in the pressure measuring tube (301), and a connecting rod (3022) installed between the two pistons (3021).

5. A mixed gas concentration detection device according to claim 1, characterized in that: The vacuum unit (4) comprises an exhaust pipe (401) installed on the side wall of the air chamber (101), and a vacuum pump (403) installed at the output end of the exhaust pipe (401).

6. A mixed gas concentration detection device according to claim 5, characterized in that: The vacuum unit (4) further comprises a sealing valve (402) movably arranged in the exhaust pipe (401).

7. A mixed gas concentration detection device according to claim 2, characterized in that: The acquisition unit (5) comprises a fixed plate (501) mounted on the inner bottom wall of the gas chamber (101), a plurality of gas concentration sensors (502) mounted on the top of the fixed plate (501), a data acquisition module (503) arranged outside the gas chamber (101), an alarm (505) mounted on the top of the data acquisition module (503), and a conductive line (504) arranged between the fixed plate (501) and the data acquisition module (503).

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