Coal gas sampling pipeline filtering device

Abstract

The present application belongs to the technical field of coal gas sampling and detection, and relates to a coal gas sampling pipeline filtering device, which comprises a coal gas pipeline, a sampling pipeline and a measuring instrument, the sampling pipeline is arranged between the coal gas pipeline and the measuring instrument, and further comprises a device body, an air inlet pipeline, an air outlet pipeline and a filtering assembly. The coal gas in the coal gas pipeline enters the filtering device through the air inlet pipeline arranged on the filtering device. After the coal gas is filtered by the multi-level filtering components arranged in the filtering device, the coal gas is sent to the air outlet pipeline and then enters the sampling pipeline. The impurity particles in the coal gas are effectively prevented from adhering and gathering on the valve core of the sampling needle valve or the fine gap between the sampling needle valve and the inner wall of the sampling pipeline, thereby preventing the sampling needle valve or the sampling pipeline from being blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal gas sampling detection, in particular to a coal gas sampling pipeline filtering device. BACKGROUND

[0002] At present, the coal gas generated in the steelmaking and ironmaking process is measured by the pressure or flow of the coal gas through the sampling pipe and measuring instruments installed above the coal gas pipeline. The sampling port is directly opened on the main coal gas pipeline, the sampling pipe is welded, the needle valve is arranged on the sampling pipe, and the sampling pipe is connected to the measuring instrument to measure the related instrument control parameters. However, due to the small valve core of the sampling pipe and the needle valve used in the prior art, the fine particles in the coal gas pipeline are easily adhered and aggregated at the inlet of the needle valve. In addition, there is a small gap between the sampling needle valve and the inner wall of the sampling pipeline, and the dust particles are also accumulated and adhered in the gap, causing the needle valve to be blocked, thereby causing the sampling pipeline to be blocked and affecting production. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a coal gas sampling pipeline filtering device to solve the problem that the fine particles in the coal gas pipeline are easily adhered and aggregated at the inlet of the needle valve, and there is a small gap between the sampling needle valve and the inner wall of the sampling pipeline, and the dust particles are also accumulated and adhered in the gap, causing the needle valve to be blocked, thereby causing the sampling pipeline to be blocked and affecting production.

[0004] To achieve the above-mentioned purposes and other related purposes, the present application provides a coal gas sampling pipeline filtering device, which comprises a coal gas pipeline, a sampling pipeline and a measuring instrument. The sampling pipeline is arranged between the coal gas pipeline and the measuring instrument, and further comprises:

[0005] A device body is provided with an air inlet pipe and an air outlet pipe at both ends in the height direction, the air inlet pipe is in communication with the coal gas pipeline, the air outlet pipe is in communication with the sampling pipeline, and the sampling pipeline is in communication with the coal gas pipeline through the air outlet pipe and the air inlet pipe;

[0006] A filtering assembly is arranged in the device body, the filtering assembly comprises at least one filtering component arranged in the height direction of the device body, and the filtering component is used for filtering the coal gas flowing into the device body through the air inlet pipe and flowing to the air outlet pipe.

[0007] Optionally, the filtering assembly further comprises at least one filtering support connected with the device body, and the filtering component is arranged on the filtering support.

[0008] Optionally, the filter support comprises at least one drainage support connected with the device body and at least one bearing support connected with the drainage support, the bearing support being used for bearing the filter components, and the drainage support being used for draining the gas flowing into the device body through the gas inlet pipeline to the gas outlet pipeline.

[0009] Optionally, the drainage support comprises straight drainage sections and arc-shaped drainage sections, and the bearing support is connected with the arc-shaped drainage sections, and the filter components are arranged between the bearing support and the arc-shaped drainage sections.

[0010] Optionally, the filter support comprises first and second drainage supports arranged along the length direction of the device body, the straight drainage sections and the arc-shaped drainage sections on the first drainage support are arranged in a staggered manner with the adjacent straight drainage sections and arc-shaped drainage sections on the second drainage support along the height direction of the device body, three arc-shaped drainage sections are arranged on each of the first and second drainage supports, and the straight drainage section is arranged between the adjacent two arc-shaped drainage sections on each of the first and second drainage supports, and the first and second drainage supports form a straight gas flow channel in the device body.

[0011] Optionally, the filter assembly comprises six filter components arranged along the height direction of the device body, and the filter density of the filter components arranged along the direction from the gas inlet pipeline to the gas outlet pipeline gradually increases in sequence.

[0012] Optionally, the device body comprises a filter chamber used for mounting the filter assembly and a device cover plate used for sealing the filter chamber.

[0013] Optionally, the inner side wall of the filter chamber is provided with a positioning component used for positioning and mounting the filter support, and the positioning component comprises a first positioning component used for positioning and mounting the straight drainage section and a second positioning component used for positioning and mounting the arc-shaped drainage section.

[0014] Optionally, a sealing component is further arranged between the filter chamber and the device cover plate, and the sealing groove used for mounting the sealing component is arranged on the sealing fitting surface of the filter chamber and the device cover plate.

[0015] Optionally, the pipe diameter of the gas inlet pipeline is greater than the pipe diameter of the gas outlet pipeline, the pipe diameter of the gas outlet pipeline is the same as the pipe diameter of the sampling pipeline, and a stop valve is arranged on the gas inlet pipeline.

[0016] As described above, the present application has the following beneficial effects: by setting the filter device between the sampling pipeline and the gas pipeline, the gas in the gas pipeline enters the filter device through the gas inlet pipeline set on the filter device, after being filtered by the multi-level filter components set in the filter device, the gas is sent to the gas outlet pipeline and then enters the sampling pipeline, effectively avoiding the problem of the impurity particles in the gas sticking and gathering on the valve core of the sampling needle valve or the fine gap between the sampling needle valve and the inner wall of the sampling pipeline, causing the sampling needle valve or the sampling pipeline to be blocked, and the beneficial effect of avoiding the problem of affecting production due to the maintenance of the blocked sampling pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure assembly of the embodiment of the present application is shown.

[0018] Figure 2 The gas flow direction during the ventilation of the filter device is shown.

[0019] Figure 3 The gas flow direction during the ventilation of the filter device is shown.

[0020] Figure 4 The impurity falling process when the gas pressure of the filter device is reduced or static is shown.

[0021] Figure 5 The flange connection of the filter device and the sealing cooperation surface of the device cover plate are shown.

[0022] Figure 6 The flange connection of the filter device and the sealing cooperation surface of the device cover plate are shown.

[0023] Figure 7 The flange connection of the filter device and the sealing cooperation surface of the device cover plate are shown.

[0024] Figure 8 The structure of the device cover plate is shown.

[0025] Figure 9 The structure of the sealing component is shown.

[0026] Figure 10 The welding of the filter device and the sealing cooperation surface of the device cover plate are shown.

[0027] PART NUMBER DESCRIPTION

[0028] Device body 1, gas inlet pipeline 101, gas outlet pipeline 102, filter chamber 103, device cover plate 104, filter component 2, filter support 3, first drainage support 301, second drainage support 302, straight drainage section 303, arc-shaped drainage section 304, straight guide section 305, bearing support 306, positioning component 4, first positioning component 401, second positioning component 402, sealing component 5, sealing groove 6, stop valve 7, gas pipeline 8, sampling pipeline 9, sampling needle valve 10, measuring instrument 11, blowdown needle valve 12, blowdown pipeline 13, connecting flange 14. DETAILED DESCRIPTION

[0029] Other advantages and effects of the present application can be easily understood by those skilled in the art from the contents disclosed in the present specification. The present application can also be implemented or applied by other different specific embodiments, and the details in the present specification can be modified or changed based on different views and applications without departing from the spirit of the present application.

[0030] Please refer to Figures 1 to 10 It should be noted that the drawings provided in the present embodiment only schematically illustrate the basic concept of the present application, and thus the drawings only show the components related to the present application, but are not drawn according to the number, shape and size of the components in actual implementation. The type, number and proportion of the components in actual implementation can be arbitrarily changed, and the layout type of the components can also be more complex. The structure, proportion, size, etc. shown in the drawings attached to the present specification are only used to understand and read the contents disclosed in the present specification by those skilled in the art, and do not define the limited conditions for implementing the present application, so they do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical contents disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are only for the convenience of clear description, and are not used to limit the scope of implementation of the present application. The change or adjustment of the relative relationship, without substantially changing the technical contents, is also considered as the scope of implementation of the present application.

[0031] Before the embodiments of the present application are described in detail, the application environment of the present application is described. The technology of the present application is mainly applied to the field of coal gas sampling and detection. The present application is used to solve the problem that in the existing technology, fine particles in the coal gas pipeline are easily adhered and aggregated at the inlet of the needle valve, and there is a small gap between the sampling needle valve and the inner wall of the sampling pipeline, and dust particles will also accumulate and adhere in the gap, causing the needle valve to be blocked, thereby causing the sampling pipeline to be blocked, and further affecting production.

[0032] Please combine Figures 1 to 10 As shown in the accompanying drawings, the present application provides a coal gas sampling pipeline filtering device, which comprises a coal gas pipeline 8, a sampling pipeline 9 and a measuring instrument 11, the sampling pipeline 9 is arranged between the coal gas pipeline 8 and the measuring instrument 11, and further comprises:

[0033] In an exemplary embodiment of the present application, the device body 1 is provided with an air inlet pipeline 101 and an air outlet pipeline 102 at two ends in the height direction, the air inlet pipeline 101 is communicated with the coal gas pipeline 8, the air outlet pipeline 102 is communicated with the sampling pipeline 9, and the sampling pipeline 9 is communicated with the coal gas pipeline 8 through the air outlet pipeline 102 and the air inlet pipeline 101; the filtering assembly is arranged in the device body 1, and comprises at least one filtering component 2 arranged in the height direction of the device body 1, which is used for filtering the coal gas flowing into the device body 1 through the air inlet pipeline 101 and flowing to the air outlet pipeline 102.

[0034] In the embodiment, by arranging the filtering device between the sampling pipeline 9 and the coal gas pipeline 8, the coal gas in the coal gas pipeline 8 enters the filtering device through the air inlet pipeline 101 arranged on the filtering device, is filtered by the multiple filtering components 2 arranged in the filtering device, and is then sent to the air outlet pipeline 102 and then enters the sampling pipeline 9, thereby effectively avoiding the problem that the impurity particles in the coal gas are bonded and gathered on the valve core of the sampling needle valve 10 or the fine gap between the sampling needle valve 10 and the inner wall of the sampling pipeline 9, causing the sampling needle valve 10 or the sampling pipeline 9 to be blocked, and the beneficial effect of avoiding the problem that the production is affected due to the maintenance of the blocked sampling pipeline 9.

[0035] In an exemplary embodiment of the present application, the filtering assembly further comprises at least one filtering support 3, the filtering support 3 is connected with the device body 1, and the filtering component 2 is arranged on the filtering support 3.

[0036] In the embodiment, the filtering assembly comprises two filtering supports 3 arranged in the height direction of the device body 1, the two ends of the filtering support 3 in the height direction of the device body 1 are clamped with the device body 1, the filtering assembly comprises six filtering components 2 arranged on the filtering support 3 in the height direction of the device body 1, three filtering components 2 are arranged on each filtering support 3, and the device body 1 has a rectangular structure.

[0037] In an exemplary embodiment of the present application, the filtering support 3 comprises at least one drainage support and at least one bearing support 306, the drainage support is connected with the device body 1, the bearing support 306 is connected with the drainage support, the bearing support 306 is used for bearing and mounting the filtering component 2, and the drainage support is used for draining the coal gas flowing into the device body 1 through the air inlet pipeline 101 to the air outlet pipeline 102.

[0038] In the embodiment, the filter assembly comprises two filter supports 3, each of which comprises two drainage supports and three layers of bearing supports 306 arranged on the drainage supports along the height direction of the device body 1. Each layer of bearing supports 306 and the connection end of the drainage support enclose a containing space for installing the filter components 2. The bearing support 306 is in an "L" shape structure, and the bearing support 306 and the connection end of the drainage support enclose a 1 / 4 cylindrical structure, the axis of the cylinder extends along the width direction of the device body 1. The gas in the gas pipeline 8 flows into the device body 1 through the gas inlet pipeline 101, and the gas flowing into the device body 1 is guided by the drainage support to each layer of filter components 2 for filtration. After the gas flows out through the last layer of filter components 2, the filtered gas is guided by the drainage support to the gas outlet pipeline 102 and enters the sampling pipeline 9.

[0039] In an example embodiment of the present application, the drainage support comprises a straight drainage section 303 and an arc-shaped drainage section 304, and the bearing support 306 is connected to the arc-shaped drainage section 304, and the filter component 2 is arranged between the bearing support 306 and the arc-shaped drainage section 304.

[0040] In the embodiment, each drainage support comprises three straight drainage sections 303 and three arc-shaped drainage sections 304, and the straight drainage sections 303 and the arc-shaped drainage sections 304 on each drainage support are arranged in an intersecting and spaced manner. By arranging the arc-shaped drainage sections 304 and the straight drainage sections 303 in an intersecting and spaced manner, a right angle is avoided between the straight drainage sections 303 and the arc-shaped drainage sections 304, so that the gas is not blocked and flows back into the gas pipeline 8, thereby failing to realize real-time monitoring of the gas in the gas pipeline 8. The straight drainage sections 303 and the arc-shaped drainage sections 304 on one drainage support are arranged in a staggered manner along the height direction of the device body 1 with the straight drainage sections 303 and the arc-shaped drainage sections 304 on the other drainage support.

[0041] In an example embodiment of the present application, the filter support 3 comprises a first drainage support 301 and a second drainage support 302 arranged along the length direction of the device body 1. The straight drainage sections 303 and the arc-shaped drainage sections 304 on the first drainage support 301 are arranged in a staggered manner along the height direction of the device body 1 with the adjacent straight drainage sections 303 and the arc-shaped drainage sections 304 on the second drainage support 302. Each of the first drainage support 301 and the second drainage support 302 is provided with three arc-shaped drainage sections 304, and a straight drainage section 303 is connected between two adjacent arc-shaped drainage sections 304 on each drainage support. The first drainage support 301 and the second drainage support 302 form a straight gas flow channel in the device body 1.

[0042] In the embodiment, the first drainage support 301 and the second drainage support 302 are connected with the linear flow guide section 305 on the inner wall of the device body 1 close to the inlet pipeline 101, and the gas flowing into the inlet pipeline is guided into the first level filter component 2 through the linear flow guide section 305. The linear flow guide section 303 and the arc flow guide section 304 are arranged in a staggered manner on the first drainage support 301 and the second drainage support 302, so that the gas flowing through the drainage support can only reach one level of filter component 2 on one drainage support for filtration each time, thereby enabling multiple levels of filter components 2 to be arranged in the filter device for filtration, and having the beneficial effect of prolonging the service life of each level of filter component 2. The first drainage support 301 is connected between the linear flow guide section 303 and the inner side wall of the device body 1 close to one end of the outlet pipeline 102, and the second drainage support 302 is connected between the arc flow guide section 304 and the inner side wall of the device body 1 close to one end of the outlet pipeline 102. The first drainage pipeline and the second drainage pipeline form a gas straight-flow passage in the device body 1 due to the installation position. When each level of filter component 2 reaches the limit of service life, i.e., the filter component 2 is full of impurity particles adhered and accumulated, the gas entering the device body 1 directly passes through the gas straight-flow passage to the outlet pipeline 102 and enters the sampling pipeline 9. The operating personnel clean or replace the filter component 2 within a certain period. When the gas pipeline 8 is stopped, the gas pressure in the gas pipeline 8 decreases, and part of the impurity particles adhered to the filter component 2 will fall back to the linear flow guide section 303 under the action of gravity and slide from the linear flow guide section 303 to the gas straight-flow passage, fall back to the gas pipeline 8 through the gas straight-flow passage, and further prolong the service life of the filter component 2.

[0043] In an example embodiment of the present application, the filter assembly includes six levels of filter components 2 arranged along the height direction of the device body 1. The filter density of the filter components 2 arranged along the inlet pipeline 101 to the outlet pipeline 102 direction increases gradually in turn.

[0044] In the embodiment, the filter density of the filter components 2 arranged on the filter support 3 along the inlet pipeline 101 to the outlet pipeline 102 direction increases gradually. The closer to the outlet pipeline 102, the greater the filter density of the filter component 2. The impurity particles in the gas are filtered layer by layer, thereby ensuring that the gas entering the sampling pipeline 9 has almost no impurity particles, avoiding the accumulation and adhesion of impurity particles in the sampling pipeline 9, blocking the sampling pipeline 9, and causing the gas in the gas pipeline 8 to be unable to be monitored, thereby affecting the normal production.

[0045] In an example embodiment of the present application, the device body 1 includes a filter chamber 103 and a device cover plate 104. The filter chamber 103 is used to install the filter assembly, and the device cover plate 104 is used to seal the filter chamber 103.

[0046] In the embodiment, the filter chamber 103 can be opened or sealed by the device cover plate 104, when it is necessary to clean the impurity particles adhered to the filter component 2 in the filter chamber 103 or replace the filter component 2 or replace the filter assembly, the filter chamber 103 can be opened for maintenance or replacement operation by disassembling the device cover plate 104.

[0047] In an exemplary embodiment of the present application, the inner side wall of the filter chamber 103 is provided with a positioning component 4 for positioning and installing the filter support 3, the positioning component 4 includes a first positioning component 4014 for positioning and installing the straight flow guide section 303 and a second positioning component 4024 for positioning and installing the arc-shaped flow guide section 304.

[0048] In the embodiment, the straight flow guide section 303 on the first flow guide support 301 close to one end of the gas outlet pipeline 102 is limited and clamped with the first positioning component 4014, and the straight flow guide section 305 on the first flow guide support 301 close to one end of the gas inlet pipeline 101 is also limited and clamped with the first positioning component 4014, the arc-shaped flow guide section 304 on the second flow guide support 302 close to one end of the gas outlet pipeline 102 is clamped with the second positioning component 4024, and the straight flow guide section 305 on the second flow guide support 302 close to one end of the gas inlet pipeline 101 is clamped with the first positioning component 4014.

[0049] In an exemplary embodiment of the present application, a sealing component 5 is further provided between the filter chamber 103 and the device cover plate 104, and a sealing groove 6 for installing the sealing component 5 is provided on the sealing fit surface of the filter chamber 103 and the device cover plate 104.

[0050] In the embodiment, the sealing component 5 is a rubber sealing ring, and the device cover plate 104 is a bottom plate sealing flange, the sealing component 5 is installed on the sealing groove 6 provided on the sealing fit surface of the filter chamber 103 and the device cover plate 104, which further enhances the sealing effect of the device cover plate 104 on the filter chamber 103.

[0051] In an exemplary embodiment of the present application, the pipe diameter of the gas inlet pipeline 101 is greater than the pipe diameter of the gas outlet pipeline 102, the pipe diameter of the gas outlet pipeline 102 is the same as the pipe diameter of the sampling pipeline 9, and a stop valve 7 is provided on the gas inlet pipeline 101.

[0052] In the embodiment, the gas inlet pipeline 101 adopts a large pipe diameter, so that the gas inlet pipeline 101 is not easy to be blocked, by providing a large pipe diameter stop valve 7 on the gas inlet pipeline 101, the impurity particles in the gas are also not easy to accumulate and cause the large pipe diameter stop valve 7 to be blocked, by closing the stop valve 7, the online maintenance or replacement of the filter device can be realized, which does not affect the production, thereby avoiding the beneficial effects of blocking maintenance and replacement of the sampling pipeline 9 or the sampling needle type valve 10, and the need to stop production.

[0053] In another exemplary embodiment, the gas inlet pipe is connected to the gas pipe 8 by a connecting flange 14 or by welding.

[0054] In another exemplary embodiment, a sampling pipe 9 is further provided with a blowdown pipe 13 for detecting the discharged gas after completion, and the blowdown pipe 13 is provided with a blowdown needle valve 12.

[0055] The working principle is that by arranging the filter device of the application in front of the gas pipe 8 and the sampling pipe 9, the gas in the gas pipe 8 enters the filter chamber 103 through the gas inlet pipe 101 on the filter device, is guided to flow into the arc-shaped flow guide section 304 on the first flow guide support 301 through the straight flow guide section 305, is subjected to first-level filtration by the filter component 2 arranged on the arc-shaped flow guide section 304, is guided to flow into the arc-shaped flow guide section 304 on the second flow guide support 302 through the straight flow guide section 303 on the second flow guide support 302, is subjected to second-level filtration by the filter component 2 in the arc-shaped flow guide section 304 on the second flow guide support 302, and after being subjected to six times of filtration in turn, the gas enters the sampling pipe 9 through the gas outlet pipe 102, and then flows into the measuring instrument 11 through the sampling needle valve 10 to monitor the gas in the gas pipe 8 in real time. The gas inlet pipe 101 adopts a large pipe diameter, so that the gas inlet pipe 101 is not easy to be blocked. By arranging a large-diameter stop valve 7 on the gas inlet pipe 101, the impurity particles in the gas are not easy to accumulate to block the large-diameter stop valve 7. By closing the stop valve 7, the online maintenance or replacement of the filter device can be realized without affecting the production, thereby having the beneficial effects of avoiding the blockage and maintenance of the sampling pipe 9 or the sampling needle valve 10, and the need to stop production for replacement. The technical solution of the application effectively avoids the problem that the impurity particles in the gas are bonded and accumulated on the valve core of the sampling needle valve 10 or the fine gap between the sampling needle valve 10 and the inner wall of the sampling pipe 9 to cause the blockage of the sampling needle valve 10 or the sampling pipe 9, and has the beneficial effects of avoiding the problem that the blockage of the sampling pipe 9 affects the production during maintenance.

[0056] The above embodiments are only illustrative of the principles and effects of the application, and are not intended to limit the application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical thought disclosed by the application should be covered by the claims of the application.

Claims

1. A coal gas sampling pipe filtering device comprising a coal gas pipe, a sampling pipe and a measuring instrument, the sampling pipe being provided between the coal gas pipe and the measuring instrument, characterized in that, Also comprising: a device body, two ends of the device body in the height direction are respectively provided with an air inlet pipeline and an air outlet pipeline, the air inlet pipeline is communicated with the coal gas pipeline, the air outlet pipeline is communicated with the sampling pipeline, the sampling pipeline is communicated with the coal gas pipeline through the air outlet pipeline, the air inlet pipeline and the coal gas pipeline; a filter assembly arranged in the device body, the filter assembly comprises at least one layer of filter components arranged in the height direction of the device body, the filter components are used for filtering the coal gas flowing into the device body through the air inlet pipeline and flowing to the air outlet pipeline; the filter assembly further comprises at least one filter support connected with the device body, and the filter components are arranged on the filter support; the filter support comprises at least one drainage support connected with the device body and at least one bearing support connected with the drainage support, the bearing support is used for bearing and mounting the filter components, and the drainage support is used for draining the coal gas flowing into the device body through the air inlet pipeline to the air outlet pipeline; the drainage support comprises a straight drainage section and an arc-shaped drainage section, the bearing support is connected with the arc-shaped drainage section, and the filter components are arranged between the bearing support and the arc-shaped drainage section; the filter support comprises a first drainage support and a second drainage support arranged in the length direction of the device body, the straight drainage section and the arc-shaped drainage section on the first drainage support are arranged in a staggered manner with the adjacent straight drainage section and arc-shaped drainage section on the second drainage support in the height direction of the device body, three arc-shaped drainage sections are arranged on each of the first drainage support and the second drainage support, a straight drainage section is connected between two adjacent arc-shaped drainage sections on each of the first drainage support and the second drainage support, and the first drainage support and the second drainage support form a straight flow channel for the coal gas in the device body. The filter assembly comprises six layers of filter components arranged in the height direction of the device body, and the filtering density of the filter components arranged in the direction from the air inlet pipeline to the air outlet pipeline gradually increases in stages.

2. The coal gas sampling conduit filter apparatus of claim 1, wherein: The device body comprises a filter chamber for mounting the filter assembly and a device cover plate for sealing the filter chamber.

3. A coal gas sampling conduit filter apparatus according to claim 2, characterised in that: A positioning component for positioning and mounting the filter support is arranged on the inner side wall of the filter chamber, the positioning component comprises a first positioning component for positioning and mounting the straight drainage section and a second positioning component for positioning and mounting the arc-shaped drainage section.

4. The coal gas sampling conduit filter apparatus of claim 2, wherein: A sealing component is further arranged between the filter chamber and the device cover plate, and a sealing groove for mounting the sealing component is arranged on the sealing fitting surface of the filter chamber and the device cover plate.

5. A gas sampling conduit filter device according to any one of claims 1 to 4, characterised in that: The pipe diameter of the air inlet pipeline is greater than that of the air outlet pipeline, the pipe diameter of the air outlet pipeline is the same as that of the sampling pipeline, and a stop valve is arranged on the air inlet pipeline.

Images