Waterproof and dustproof protection device for extraction opening of portable gas detector

Abstract

The utility model provides a waterproof and dustproof protection device for an extraction opening of a portable gas detector. The waterproof and dustproof protection device comprises a first filter and a four-way valve, the four-way valve is communicated with an extraction opening of the gas detector through a second gas inlet pipe; the first filter is communicated with the four-way valve through a first air inlet pipe and used for filtering liquid and dust in air entering the first air inlet pipe. According to the waterproof and dustproof protection device for the extraction opening of the portable gas detector, provided by the invention, water and dust resistance of the gas inlet pipe of the portable gas detector in a high-water-dust-concentration environment can be realized.

Description

Technical Field

[0001] The present application relates to the field of gas detection, and in particular to a waterproof and dustproof protection device for an air suction port of a portable gas detector. Background Art

[0002] According to the requirements of safety regulations, environmental gas detection is required when performing hot work and confined space operations. Usually, environmental gas detection is divided into two methods: timed detection and continuous monitoring. Currently, portable multi-gas detection alarms and portable area continuous gas detection alarms are commonly used to perform environmental gas detection in various continuous maintenance work sites in the factory. However, due to different working conditions at different sites, the use environment is complex and changeable, and water and dust are prone to enter and damage the detector.

[0003] In the prior art, a syringe filter is usually added to the air inlet of the gas detector to provide water and dust protection. However, this method is prone to clogging of the filter membrane and pipeline in an environment with high water and dust. When the clogging is not serious, due to the high water and dust content, the syringe filter has poor filtering effect on water and dust, causing water and dust to enter the gas detector and damage the instrument. Utility Model Content

[0004] In response to the above-mentioned problems, the present application provides a waterproof and dustproof protection device for the air intake port of a portable gas detector, which can block water and dust from the air intake pipe of the portable gas detector in an environment with high water and dust concentration.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a portable gas detector air inlet waterproof and dustproof protection device, comprising: a first filter, a four-way valve;

[0007] The four-way valve is connected to the gas extraction port of the gas detector through the second air inlet pipe;

[0008] The first filter is connected to the four-way valve through the first air inlet pipe, and is used for filtering liquid and dust in the gas entering the first air inlet pipe.

[0009] In a possible implementation, the portable gas detector air inlet waterproof and dustproof protection device further includes: a second filter;

[0010] The second filter is connected in series between the first filter and the four-way valve through the first intake pipe, and is used to adjust the intake pressure while filtering the gas.

[0011] In a possible implementation, the first filter is a visible and drainable gas filter.

[0012] In a possible implementation manner, the second filter is a pressure regulating filter.

[0013] In a possible implementation, the first filter includes: a filter element, a transparent water storage tank, and a first drain pipe;

[0014] The filter element is connected to the first air inlet pipe and is used to filter liquid and solid impurities in the passing gas and discharge the filtered liquid into the transparent water storage tank;

[0015] The transparent water storage tank is arranged around the filter element, and the bottom is connected to the first drain pipe;

[0016] The first drain pipe is used to drain the liquid in the transparent water storage tank.

[0017] In a possible implementation, a transparent protective shell is further provided on the outer side of the transparent water storage tank.

[0018] In a possible implementation, the second filter adjusts the air intake pressure through a pressure regulating handle; and discharges the filtered liquid through a second drainage pipe.

[0019] In a possible implementation manner, the second filter has a first display screen for displaying the pressure of the gas passing through the second filter.

[0020] In a possible implementation, the gas detector has a second display screen for displaying gas analysis results.

[0021] In a possible implementation manner, the four-way valve has an exhaust end.

[0022] The portable gas detector air outlet waterproof and dustproof protection device provided in the present application can provide a gas detector air outlet device with visible liquid level, pressure reduction, water and dust filtration, and gas-liquid separation functions, overcoming the technical problems in the prior art of water dust, easily condensable liquids and the like being introduced into the instrument along with gas samples, leading to pipeline blockage, sensor damage, pump failure, and instrument circuit board immersion in liquid causing instrument damage. It can also buffer the nonlinear response of the sensor caused by changes in sample gas pressure, facilitate maintenance and replacement of the sample pretreatment device, thereby extending the service life of the sensor and stabilizing the instrument status. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.

[0024] Figure 1A schematic structural diagram of a portable gas detector air outlet waterproof and dustproof protection device in an uninflated state provided in an embodiment of the present application.

[0025] Figure markings: 1-first filter, 11-filter element, 12-transparent water storage tank, 13-transparent protective shell, 14-first drain pipe; 2-second filter, 21-pressure regulating handle, 22-second drain port, 23-first display screen; 3-four-way valve, 31-emptying end; 4-inlet pipe; 5-portable gas detector, 51-second display screen, 52-exhaust port, 53-second inlet pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of this application, unless otherwise specified, "plurality" means two or more.

[0028] Example 1

[0029] Figure 1 A portable gas detector air inlet waterproof and dustproof protection device provided in an embodiment of the present application comprises: a first filter 1, a four-way valve 3;

[0030] The four-way valve 3 is connected to the air extraction port 52 of the gas detector 5 through the second air inlet pipe 53;

[0031] The first filter 1 is connected to the four-way valve 3 through the first air inlet pipe 4 and is used to filter liquid and dust in the gas entering the first air inlet pipe 4 .

[0032] Optionally, the first air inlet pipe 4 has two sections, one section is connected to the input end of the first filter 1 , and the other section is connected to the output end of the first filter 1 and the four-way valve 3 .

[0033] In a possible implementation manner, the portable gas detector air inlet waterproof and dustproof protection device further includes: a second filter 2;

[0034] The second filter 2 is connected in series between the first filter 1 and the four-way valve 3 through the first intake pipe 4, and is used to adjust the intake pressure while filtering the gas.

[0035] Optionally, the input end of the second filter 2 is connected to the output end of the first filter 1 , and the output end is connected to the four-way valve 3 through the first air intake pipe 4 .

[0036] In a possible implementation, the first filter 1 is a visible and drainable gas filter.

[0037] The visual and drainable gas filter is a device specially used to filter solid impurities and liquid droplets in the gas, and has visual observation and convenient drainage functions. Although gas filters usually do not accumulate a large amount of liquid like liquid filters, in application scenarios such as high humidity, condensation droplets, oil mist, etc., droplets or oil will accumulate inside the gas filter and need to be discharged regularly.

[0038] In a possible implementation manner, the second filter 2 is a pressure regulating filter.

[0039] The pressure regulating filter is a device that integrates filtering and pressure regulating functions, and is mainly used in gas or liquid delivery systems to filter impurities in the fluid and maintain a constant pressure output.

[0040] In a possible implementation, the first filter 1 includes: a filter element 11, a transparent water storage tank 12, and a first drain pipe 14;

[0041] The filter element 11 is connected to the first air inlet pipe 4 and is used to filter liquid and solid impurities in the passing gas and discharge the filtered liquid into the transparent water storage tank 12;

[0042] The transparent water storage tank 12 is arranged around the filter element 11, and the bottom is connected to the first drain pipe 14;

[0043] The first drain pipe 14 is used to drain the liquid in the transparent water storage tank 12 .

[0044] Optionally, the first drain pipe 14 has a self-sealing structure for draining water when pressed.

[0045] In a possible implementation, a transparent protective shell 13 is further provided on the outer side of the transparent water storage tank 12. This implementation makes it possible to observe the water and dust accumulation in the first filter 1 while protecting the filter.

[0046] In a possible implementation manner, the second filter 2 adjusts the air intake pressure through a pressure regulating handle 21 , and discharges the filtered liquid through a second drainage pipe 22 .

[0047] In a possible implementation manner, the second filter 2 has a first display screen 23 for displaying the gas pressure passing through the second filter 2 .

[0048] In a possible implementation, the gas detector 5 has a second display screen 51 for displaying gas analysis results.

[0049] In a possible embodiment, the four-way valve 3 has an emptying end 31. With this embodiment, when water or liquid is found entering the filter, the four-way valve can be switched to the emptying end 31, and the gas passage of the instrument can be cut off to drain the filter. After the liquid is drained, the four-way valve can be switched to the connection end between the filter and the second air inlet pipe 53, and the air intake can be connected to the air intake passage of the instrument for continuous detection.

[0050] Working principle:

[0051] According to the distance between the equipment or confined space and the instrument, install the first air inlet pipe 4 of appropriate length at the inlet of the first filter 1, then block the air inlet end of the first air inlet pipe 4, close the exhaust port with the four-way valve, switch to the gas detection state, and test it in conjunction with the instrument. Use the suction pump inside the machine to test the air tightness until the air tightness is qualified. After carrying it to the work site, the first air inlet pipe 4 is extended into the space to be tested for testing. During the test, the user can visually observe whether water and dust are inhaled into the filter and whether the pipeline is blocked.

[0052] If water or liquid is found in the filter during the test, switch the four-way valve to the empty state, cut off the gas channel with the instrument, and press the self-sealing device at the bottom of the filter to drain the water. After the water is drained, switch the four-way valve to connect the air inlet of the instrument for continuous testing. After use, maintain and dry the device and set it aside.

[0053] Beneficial effects:

[0054] 1. The transparent shell structure of the first filter 1 of the utility model has the function of visualizing the liquid level and the cleanliness of the filter element, so that the utility model can be timely maintained according to the liquid level and the condition of the filter element. It can effectively prevent water dust, condensable liquids and other substances from being introduced into the instrument along with the gas sample.

[0055] 2. The utility model is integrated on a base for installation, which is easy to carry and can be used with various on-site pump-suction gas detection instruments or regional continuous detection instruments. It is also easy to operate, maintain and inspect.

[0056] 3. The utility model provides an air intake protection device with visual liquid level, pressure reduction, water and dust filtration, and gas-liquid separation functions, which overcomes the technical problems in the prior art that water, dust, easily condensable liquids and other substances are introduced into the instrument along with gas samples, resulting in pipeline blockage, sensor damage, pump failure, and instrument circuit board immersion in liquid, which causes instrument damage. It also has the characteristics of buffering the nonlinear response of the sensor caused by changes in sample gas pressure, easy maintenance and replacement of sample pretreatment devices, extending the service life of the sensor, and stabilizing the instrument state. It can greatly reduce the number of times the instrument is damaged due to accidental water and dust ingress, and save a lot of repair costs and time caused by damage.

[0057] In the several embodiments provided in the present application, it should be understood that the disclosed systems, modules and methods can be implemented in other ways. For example, the module embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, modules or units, which can be electrical, mechanical or other forms.

[0058] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. The present application is not limited to the exact structure described above and illustrated in the accompanying drawings, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be deemed to belong to the protection scope of the present application.

Claims

1. A portable gas detector air outlet waterproof and dustproof protection device, characterized in that: include: A first filter (1), a four-way valve (3); The four-way valve (3) is connected to the gas extraction port (52) of the gas detector (5) through the second air inlet pipe (53); The first filter (1) is connected to the four-way valve (3) via the first air inlet pipe (4) and is used to filter liquid and dust in the gas entering the first air inlet pipe (4).

2. The portable gas detector air outlet waterproof and dustproof protection device according to claim 1 is characterized in that: Also includes: A second filter (2); The second filter (2) is connected in series between the first filter (1) and the four-way valve (3) via the first air intake pipe (4), and is used to adjust the air intake pressure while filtering the gas.

3. The portable gas detector air outlet waterproof and dustproof protection device according to claim 1 is characterized in that: The first filter (1) is a visually drainable gas filter.

4. The portable gas detector air outlet waterproof and dustproof protection device according to claim 2 is characterized in that: The second filter (2) is a pressure regulating filter.

5. The portable gas detector air outlet waterproof and dustproof protection device according to claim 3 is characterized in that: The first filter (1) comprises: a filter element (11), a transparent water storage tank (12), and a first drainage pipe (14); The filter element (11) is in communication with the first air inlet pipe (4) and is used to filter liquid and solid impurities in the passing gas and discharge the filtered liquid into the transparent water storage tank (12); The transparent water storage tank (12) is arranged around the filter element (11), and the bottom is connected to the first drainage pipe (14); The first drainage pipe (14) is used to discharge the liquid in the transparent water storage tank (12).

6. The portable gas detector air outlet waterproof and dustproof protection device according to claim 5, characterized in that: A transparent protective shell (13) is also provided on the outer side of the transparent water storage tank (12).

7. The portable gas detector air outlet waterproof and dustproof protection device according to claim 4, characterized in that: The second filter (2) adjusts the air intake pressure through a pressure regulating handle (21); and discharges the filtered liquid through a second drainage pipe (22).

8. The portable gas detector air outlet waterproof and dustproof protection device according to claim 4, characterized in that: The second filter (2) has a first display screen (23) for displaying the pressure of the gas passing through the second filter (2).

9. The portable gas detector air outlet waterproof and dustproof protection device according to claim 1, characterized in that: The gas detector (5) has a second display screen (51) for displaying gas analysis results.

10. The portable gas detector air outlet waterproof and dustproof protection device according to claim 1, characterized in that: The four-way valve (3) has an exhaust end (31).

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