Rapid filter membrane replacing device for online gas analyzer

Abstract

The utility model relates to the technical field of gas analysis equipment, in particular to a quick filter membrane replacement device for an online gas analyzer, which comprises a filter, the filter comprises a bottom shell, and the outer side surface of the bottom shell is connected with the gas analyzer through a filter bracket; an air inlet and an air outlet are respectively formed in the bottom shell, a filter membrane and a glass sheet are sequentially arranged on the inner side surface of the bottom shell, and the outer side of the bottom shell is sleeved with an upper shell; according to the utility model, a structure that air enters and exits from the same side of the filter membrane is adopted, so that a glass sheet can be arranged on the other side of the filter membrane to observe the condition of the filter membrane in real time so as to check the filter membrane and find the pollution condition of the filter membrane in time; according to the utility model, the replacement of the filter membrane is simple and convenient, the replacement of the filter membrane can be quickly completed without additional tools, and the influence on production work is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of gas analysis equipment, in particular to a device for quickly replacing filter membranes of an online gas analyzer. Background Art

[0002] Gas analyzers are a commonly used process analysis instrument, mainly including thermal conductivity gas analyzers, electrochemical gas analyzers, and infrared absorption gas analyzers. Online gas analyzers can analyze the specific components and concentrations in the air in real time, and have a wide range of application scenarios in petrochemicals, environmental monitoring, food processing, medical research and other fields.

[0003] Online gas analyzers usually require a filter to block particulate matter and water molecules in the air outside. The filtered gas then enters the online gas analyzer for analysis. Current online gas analyzer filter devices are usually integrated inside the analyzer, making it difficult to confirm whether the filter membrane is contaminated. At the same time, when the filter membrane needs to be replaced, the gas analyzer usually needs to be completely disassembled, making filter membrane replacement more inconvenient. Utility Model Content

[0004] The utility model aims to provide a quick filter membrane replacement device for an online gas analyzer, which is convenient for checking the filter membrane status and replacing the filter membrane.

[0005] Based on the above purpose, the present invention adopts the following technical solutions:

[0006] An online gas analyzer quick filter membrane replacement device includes a filter, the filter includes a bottom shell, the outer side of the bottom shell is connected to the gas analyzer through a filter bracket; an air inlet and an air outlet are respectively provided on the bottom shell, and the air inlet and the air outlet are both through holes; a filter membrane and a glass sheet are sequentially provided on the inner side of the bottom shell, and an upper shell is provided on the outer side of the bottom shell.

[0007] Preferably, a ventilation groove is provided in the middle of the inner side surface of the bottom shell, and a filter membrane groove is provided in the ventilation groove; the filter membrane is fixed in the filter membrane groove by a filter membrane pressure ring, the depth of the filter membrane groove is less than the thickness of the filter membrane pressure ring, and a ventilation groove is provided on the filter membrane pressure ring.

[0008] Preferably, the air outlet is arranged in the filter membrane groove, and the air inlet is arranged in the ventilation groove.

[0009] Preferably, the filter membrane groove and the ventilation groove are eccentrically arranged.

[0010] Preferably, an annular sealing groove is provided on the outer edge of the bottom shell, and an O-ring is provided in the sealing groove.

[0011] Preferably, an air inlet ferrule joint and an air outlet ferrule joint are respectively connected to the outer side surface of the bottom shell, the air inlet ferrule joint is connected to the air inlet, and the air outlet ferrule joint is connected to the air outlet.

[0012] Preferably, the filter bracket is provided with a mounting hole, the bottom shell is provided with a mounting screw hole matching the mounting hole, and the bottom shell is fixedly connected to the filter bracket by screws.

[0013] The beneficial effects of the utility model include:

[0014] The utility model is simple and convenient to install. The filter can be installed on the gas analyzer through the filter bracket, and the air inlet and the air outlet are connected through a quickly detachable card sleeve joint. It can be adapted for use with various types of online gas analyzers.

[0015] The utility model provides a transparent glass on one side of the filter membrane, through which the condition of the filter membrane can be observed at any time to check whether the filter membrane is contaminated; when the filter membrane is found to be contaminated such as discoloration, the filter membrane pressure ring of the glass box can be removed by removing the upper shell, so that the filter membrane can be quickly replaced; the process of replacing the filter membrane does not require additional tools, the efficiency of removing and replacing the filter membrane is higher, and the impact on production and work is smaller.

[0016] The utility model is designed with a filter bottom shell groove structure with air inlet and outlet on the same side, so as to achieve the effect of air inlet and outlet on one side and observation of the filter membrane condition on the other side; at the same time, a sealing groove is provided, and an O-ring is provided in the sealing groove. The O-ring cooperates with the glass sheet to realize the sealing between the inner gas channel and the outer space, thereby ensuring that the collected air will not be contaminated by the outside air. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is an exploded view of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the present invention after removing the upper shell and glass sheet;

[0020] Figure 4 This is a schematic diagram of the inner structure of the bottom shell of the present utility model;

[0021] Figure 5 This is a schematic diagram of the outer structure of the bottom shell of the present utility model.

[0022] In the figure, there are upper shell 1, filter bracket 2, bottom shell 3, air inlet 31, air outlet 32, filter membrane groove 33, ventilation groove 34, sealing groove 35, mounting screw hole 36, glass piece 4, air outlet ferrule connector 5, air inlet ferrule connector 6, filter membrane 7, filter membrane pressure ring 8 and O-ring 9. DETAILED DESCRIPTION

[0023] The following is a further explanation of the present invention in conjunction with specific embodiments. Figure 1 As shown, this embodiment is a quick-replacement filter membrane device for an online gas analyzer, comprising a filter, which is fixedly connected to the online gas analyzer through a filter bracket 2. The main body of the filter comprises a disc-shaped bottom shell 3, on the outside of which an upper shell 1 is sleeved; four evenly distributed slots are provided at the outer edge of the upper shell 1, which can be used in conjunction with a special wrench for quick disassembly and assembly.

[0024] The internal structure of the filter is as follows Figure 2 and Figure 3 As shown, the outer side of the bottom shell 3 is fixedly connected to the filter bracket 2, and the filter membrane 7, the filter membrane pressure ring 8 and the glass sheet 4 are arranged in sequence on the inner side; the glass sheet 4 is clamped between the upper shell 1 and the bottom shell 3 by the upper shell 1, and the filter membrane 3 arranged on its inner side can be observed through the glass sheet 4.

[0025] The inner structure of the bottom shell 3 is as follows: Figure 4 As shown, a ventilation groove 34 is provided in the middle position, and a filter membrane groove 33 is provided inside the ventilation groove 34; an air outlet 32 is provided in the filter membrane groove 33, and an air inlet 31 is provided in the ventilation groove 34; the filter membrane groove 33 and the ventilation groove 34 are eccentrically matched, and the filter membrane groove 33 is sleeved on the inner side of the ventilation groove 34 and arranged tangentially, and the air inlet 31 is arranged on the opposite side of the tangent point; a limiting block structure is provided on the bottom surface of the filter membrane groove 33, so that the depth of the filter membrane groove 33 is less than the thickness of the filter membrane pressure ring 8; when the filter membrane 7 and the filter membrane pressure ring 8 are embedded in the filter membrane groove 33, the top surface of the filter membrane pressure ring 8 is higher than the edge of the filter membrane groove 33.

[0026] like Figure 3 As shown, a pair of ventilation grooves are provided on the filter membrane pressure ring 8, so that the air entering from the air inlet 31 can reach the air chamber where the filter membrane 7 is located through the ventilation grooves; an annular sealing groove 35 is provided at the edge of the inner side surface of the bottom shell 3, and an O-ring 9 is provided in the sealing groove 35; the O-ring 9 adopts a sealing silicone structure, and its diameter is slightly larger than the depth of the sealing groove 35, so that it protrudes from the sealing groove; through the fit of the O-ring 9 and the glass sheet, the space inside the filter and the external space are sealed, thereby preventing external air from leaking into the filter and causing the filter to be contaminated.

[0027] like Figure 5As shown, mounting screw holes 36 are provided on the outer surface of the bottom shell 3, and the mounting screw holes 36 cooperate with the mounting holes provided on the filter bracket 2, and the bottom shell 3 and the filter bracket 2 can be fixedly connected together by screws; the air inlet 31 and the air outlet 32 are provided with a connecting head structure on the outer surface of the bottom shell 3, and the connecting head structure is set as a threaded hole structure, which can be fixedly connected to a pair of ferrule joints by threads; the air inlet 31 is fixedly connected to the air inlet ferrule joint 6 and then connected to the air inlet pipe, and the air to be filtered and analyzed can be transported from the air inlet pipe to the filter; the air outlet 32 is connected to the air outlet ferrule joint 5 and then connected to the online gas analyzer through a pipeline, and the filtered air can be transported to the online gas analyzer to facilitate the analysis of the gas composition.

[0028] During actual use of this embodiment, the bottom shell 3 is first fixedly connected to the filter holder 2 by screws, and then the filter holder 2 is fixedly mounted on the gas analyzer or other fixed carrier to ensure the stability of the filter; then the filter membrane 7 and the filter membrane pressure ring 8 are installed in the inner filter membrane groove 33 of the bottom shell 3 in sequence, and the O-ring 9 is installed in the sealing groove 35, and then the glass sheet 4 is covered on the O-ring 9 and the filter membrane pressure ring 8, and finally the upper shell 1 is placed on the outermost side to press the glass sheet 4; the air inlet 31 is connected to the air inlet pipe through the air inlet ferrule joint 6, and the air outlet 32 is connected to the online gas analyzer through the air outlet ferrule joint 5, thus completing the installation of the filter in this embodiment.

[0029] When the online gas analyzer is in use, the condition of the filter membrane 4 inside it can be observed through the glass sheet 4. When the filter membrane 4 is found to be discolored or turbid, the filter membrane 4 can be replaced. First, remove the upper shell 1, then take out the glass sheet 4 and the filter membrane pressure ring 8 in turn, then remove the old filter membrane 7, and then embed the new filter membrane 7 in the filter membrane groove 33. Then install the filter membrane pressure ring 8, the glass sheet 4 and the upper shell 1 in turn, and the analyzer can be put into use again.

[0030] The above description is only a further explanation of the present invention in combination with specific embodiments. All descriptions do not limit the scope of protection of the present invention. Any changes or replacement solutions that can be easily thought of by any technician in this field within the technical scope disclosed by the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A quick-change filter membrane device for an online gas analyzer, comprising a filter, characterized in that: The filter includes a bottom shell, the outer side of which is connected to the gas analyzer through a filter bracket; an air inlet and an air outlet are respectively provided on the bottom shell, and both the air inlet and the air outlet are through holes; a filter membrane and a glass sheet are sequentially provided on the inner side of the bottom shell, and an upper shell is provided on the outer side of the bottom shell.

2. The online gas analyzer quick filter membrane replacement device according to claim 1, characterized in that: A ventilation groove is provided in the middle of the inner side surface of the bottom shell, and a filter membrane groove is provided in the ventilation groove; the filter membrane is fixed in the filter membrane groove by a filter membrane pressure ring, the depth of the filter membrane groove is less than the thickness of the filter membrane pressure ring, and a ventilation groove is provided on the filter membrane pressure ring.

3. The online gas analyzer rapid filter membrane replacement device according to claim 2, characterized in that: The air outlet is arranged in the filter membrane groove, and the air inlet is arranged in the ventilation groove.

4. The online gas analyzer rapid filter membrane replacement device according to claim 3, characterized in that: The filter membrane groove and the ventilation groove are eccentrically arranged.

5. The online gas analyzer rapid filter membrane replacement device according to claim 3, characterized in that: An annular sealing groove is provided on the outer edge of the bottom shell, and an O-ring is provided in the sealing groove.

6. The online gas analyzer rapid filter membrane replacement device according to claim 1, characterized in that: An air inlet ferrule joint and an air outlet ferrule joint are respectively connected to the outer side surface of the bottom shell, the air inlet ferrule joint is connected to the air inlet, and the air outlet ferrule joint is connected to the air outlet.

7. The online gas analyzer rapid filter membrane replacement device according to claim 1, characterized in that: The filter bracket is provided with a mounting hole, the bottom shell is provided with a mounting screw hole matched with the mounting hole, and the bottom shell is fixedly connected to the filter bracket by screws.

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