Ventilation device of explosion-proof gas analysis instrument

Abstract

The utility model discloses a ventilation device of an explosion-proof gas analysis instrument, which comprises a mounting seat and an external compression pipe which are oppositely arranged and connected together, one end of the external compression pipe is nested in a cavity of the mounting seat, a single-closed fire-retardant pipe is mounted in a mounting hole of the external compression pipe in an L-shaped seam allowance manner, and the single-closed fire-retardant pipe is connected with the external compression pipe. An L-shaped seam allowance is arranged in the mounting base, epoxy resin glue is filled in the L-shaped seam allowance, a pressing gasket is arranged at the joint of the single-closed fire-retardant tube and the mounting base, a drainage groove is formed in the pressing gasket, the pressing gasket and the closed end of the single-closed fire-retardant tube are arranged in the direction of the internal double-ferrule joint, and the internal double-ferrule joint is arranged in the gas analyzer shell and connected with a gas analysis sensor. The ventilation devices of the two sets of explosion-proof gas analysis instruments form a gas inlet and outlet passage; the utility model relates to a ventilation device which is used for feeding and discharging measured gas for an internal sensor of an on-line monitoring type gas analyzer, and is suitable for the specified requirements of using electrical equipment in a GB / T3836 explosive environment.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion tail gas detection devices, in particular to a ventilation device of an explosion-proof gas analysis instrument. Background Art

[0002] Explosive environments are common in the normal operation of industries such as petrochemicals, chemicals, and electric power. Explosive environments refer to places where there is a risk of explosion accidents due to the presence of explosive mixtures, and preventive measures must be taken during their production, use, storage, and loading and unloading.

[0003] The management and operation of explosion-proof hazardous areas must adhere to strict safety regulations and standards, including but not limited to preventing ignition from open flames and hot surfaces, preventing arcs and sparks, and using explosion-proof electrical equipment to reduce the risk of explosion accidents. Gas analyzers used in explosion-proof hazardous areas must comply with the requirements of GB / T3836, Electrical Equipment for Use in Explosive Atmospheres.

[0004] To address the above-mentioned technical issues, the present utility model proposes a venting device for an explosion-proof gas analyzer. When measuring process gases in hazardous locations, the venting device allows hazardous gases to be connected to the analyzer's internal gas sensor for analysis and monitoring. Furthermore, even if a spark from the electronic control unit within the gas sensor causes an explosion of combustible gases within the sensor, the venting device prevents the explosion flame from entering the process pipeline of the measured gas, preventing it from igniting the hazardous area outside the gas sensor. Utility Model Content

[0005] In view of the above technical problems in the related art, the present invention proposes a ventilation device for an explosion-proof gas analysis instrument, which can overcome the above deficiencies in the prior art.

[0006] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0007] A ventilation device for an explosion-proof gas analysis instrument;

[0008] The ventilation device of the explosion-proof gas analyzer includes a mounting base and an external compression tube that are arranged opposite to each other and connected together, one end of the external compression tube is nested in the cavity of the mounting base, a single closed fire-stop tube is installed in the mounting hole of the external compression tube in the form of an L-shaped stop, the L-shaped stop is filled with epoxy resin glue, a compression gasket is provided at the junction of the single closed fire-stop tube and the mounting base, the compression gasket and the single closed fire-stop tube are fastened to the inside of the mounting base and the external compression tube, and a drainage groove is provided on the compression gasket.

[0009] Furthermore, an external space is formed between the single closed fire-stop tube and the mounting seat, and an internal space is provided inside the single closed fire-stop tube.

[0010] Furthermore, the compression gasket and the closed end of the single closed fire arrester tube are placed in a direction adjacent to the internal double-ferrule joint, and the corresponding distal end of the internal double-ferrule joint is provided with an external double-ferrule joint.

[0011] Furthermore, the internal double-ferrule connector is arranged inside the gas analyzer housing, and one end of the internal double-ferrule connector away from the mounting seat is connected to the gas analysis sensor through a stainless steel thin-walled tube.

[0012] Furthermore, the external compression tube is connected to the mounting seat via a combination thread; and the mounting seat is connected to the gas analyzer housing via a mounting thread.

[0013] Furthermore, the compression gasket and the single closed fire-stop tube are fastened inside the external compression tube and the mounting seat in a threaded connection manner.

[0014] Furthermore, the thickness of the epoxy resin glue layer is 0.3 mm, and the total length of the epoxy resin glue encapsulation is 10 mm.

[0015] Furthermore, the single closed fire arrester tube is made by a metal powder metallurgy process, and the single closed fire arrester tube can prevent flame transmission and allow gas to flow.

[0016] Furthermore, the ventilation devices of the two sets of explosion-proof gas analysis instruments together constitute the gas inlet and outlet passages.

[0017] The beneficial effects of the utility model are as follows: through the new technical solution of the utility model product, it is possible to detect and analyze process gases that are prone to explosion in dangerous places; at the same time, even if the spark generated by the electronic control part inside the gas sensor causes the combustible gas inside the gas sensor to explode, the ventilation device of the explosion-proof gas analyzer can also prevent the explosion flame from entering the process pipeline of the measured gas, and will not detonate the dangerous place outside the gas sensor, which complies with the regulations and requirements on the use of electrical equipment in explosive environments in GB / T3836. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a cross-sectional view of a ventilation device of an explosion-proof gas analysis instrument according to an embodiment of the present utility model;

[0020] Figure 2 This is a top view of a compression gasket of a venting device of an explosion-proof gas analyzer according to an embodiment of the present utility model, which is provided with a drainage groove;

[0021] Figure 3 This is a front view of a compression gasket of a ventilation device of an explosion-proof gas analyzer according to an embodiment of the present utility model, which is provided with a drainage groove;

[0022] Figure 4 This is a schematic diagram of a ventilation device of an explosion-proof gas analyzer according to an embodiment of the present utility model, wherein the ventilation device is installed on the housing of the gas analyzer;

[0023] In the figure: 1. Internal double-ferrule connector; 2. Mounting seat; 3. Compression gasket; 4. Mounting thread; 5. Single closed fire-blocking tube; 6. Combination thread; 7. Epoxy resin glue; 8. External compression tube; 9. External double-ferrule connector; 10. External space; 11. Internal space; 21. Gas analyzer housing; 22. Gas analysis sensor; 23. Stainless steel thin-walled tube; 61. Drainage trough. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0025] It should be understood that in the description of the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot 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 said features. In the description of the embodiments of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0026] like Figure 1-4 As shown, a ventilation device of an explosion-proof gas analyzer according to an embodiment of the present utility model includes a mounting base 2 and an external compression tube 8 that are arranged opposite to each other and connected together, one end of the external compression tube 8 is nested in the cavity of the mounting base 2, and a single closed fire-blocking tube 5 is installed in the mounting hole of the external compression tube 8 in the form of an L-shaped stop, and the L-shaped stop is filled with epoxy resin glue 7, and a compression gasket 3 is provided at the junction of the single closed fire-blocking tube 5 and the mounting base 2, the compression gasket 3 and the single closed fire-blocking tube 5 are fastened to the inside of the mounting base 2 and the external compression tube 8, and a drainage groove 61 is provided on the compression gasket 3.

[0027] According to the ventilation device of an explosion-proof gas analyzer described in an embodiment of the present invention, in a specific embodiment, an external space 10 is formed between the single closed fire-stop tube 5 and the mounting seat 2, and an internal space 11 is provided inside the single closed fire-stop tube 5.

[0028] According to the ventilation device of an explosion-proof gas analyzer described in an embodiment of the present invention, in a specific embodiment, the closed ends of the compression gasket 3 and the single closed fire-stop tube 5 are placed in a direction adjacent to the internal double-ferrule joint 1, and the corresponding distal end of the internal double-ferrule joint 1 is provided with an external double-ferrule joint 9.

[0029] According to the ventilation device of an explosion-proof gas analyzer described in an embodiment of the present invention, in a specific embodiment, the internal double-ferrule connector 1 is arranged inside the gas analyzer housing 21, and the end of the internal double-ferrule connector 1 away from the mounting seat 2 is connected to the gas analysis sensor 22 through a stainless steel thin-walled tube 23.

[0030] According to the ventilation device of an explosion-proof gas analyzer described in an embodiment of the present invention, in a specific embodiment, the external compression tube 8 is connected to the mounting base 2 via a combination thread 6; the mounting base 2 is connected to the gas analyzer housing 21 via a mounting thread 4.

[0031] According to the ventilation device of an explosion-proof gas analyzer described in an embodiment of the present invention, in a specific embodiment, the compression gasket 3 and the single closed fire-blocking tube 5 are fastened to the inside of the external compression tube 8 and the mounting seat 2 in a threaded connection manner.

[0032] According to the ventilation device of an explosion-proof gas analyzer described in an embodiment of the present invention, in a specific embodiment, the thickness of the epoxy resin glue 7 is 0.3 mm, and the total sealing length of the epoxy resin glue 7 is 10 mm.

[0033] According to the ventilation device of an explosion-proof gas analyzer described in an embodiment of the present invention, in a specific embodiment, the single closed fire-stop tube 5 is made by a metal powder metallurgy process, and the single closed fire-stop tube 5 can prevent flame transmission and allow gas to circulate.

[0034] According to the ventilation device of an explosion-proof gas analysis instrument described in an embodiment of the present invention, in a specific embodiment, two sets of ventilation devices of the explosion-proof gas analysis instrument together constitute the gas inlet passage and the gas outlet passage.

[0035] In order to facilitate understanding of the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below through specific usage methods.

[0036] In specific use, according to the ventilation device of an explosion-proof gas analyzer described in the utility model, a single closed fire-stop tube 5 is installed in the hole of an external compression tube 8 in an L-shaped stopper, the L-shaped stopper is filled with epoxy resin glue 7, the external compression tube 8 is connected to the mounting seat 2 through a combination thread 6, the compression gasket 3 and the single closed fire-stop tube 5 are fastened in the external compression tube (8) and the mounting seat 2 in a threaded connection manner, and the closed ends of the compression gasket 3 and the single closed fire-stop tube 5 are placed in the direction of the internal double-ferrule joint 1.

[0037] The airflow enters through the internal double-ferrule connector 1, passes through the drainage groove 61 set on the compression gasket 3, enters the external space 10 of the single-enclosed fire-stop tube 5, passes through the gaps in the powder sintered tube wall of the single-enclosed fire-stop tube 5, enters the internal space 11 of the single-enclosed fire-stop tube 5, and then is discharged through the external double-ferrule connector 9. The airflow can also flow in the reverse direction.

[0038] like Figure 21 is a schematic diagram showing that a compression gasket 3 of a ventilation device of an explosion-proof gas analyzer according to an embodiment of the present invention is provided with a drainage groove 61 .

[0039] like Figure 3 As shown, a schematic diagram of a ventilation device of an explosion-proof gas analyzer according to an embodiment of the present invention is installed in the gas analyzer housing, including an internal double-ferrule connector 1 placed inside the gas analyzer housing 21, and a gas analysis sensor 22 is sealed and connected through a stainless steel thin-walled tube 23. The ventilation devices of the two sets of explosion-proof gas analyzers constitute a gas inlet and outlet passage.

[0040] In practical applications, the venting device for an explosion-proof gas analyzer described in this utility model utilizes a custom-made single-enclosed flame arrester tube made using a metal powder sintering process, which prevents flame transmission without hindering gas flow. This device can be used for combustible gas detection and analysis in industries such as petrochemicals, chemicals, and power generation.

[0041] To sum up, with the help of the above-mentioned technical solution of the utility model, the new technical solution of the utility model product is used to realize the detection and analysis of process gases that are prone to explosion in dangerous places; at the same time, even if the spark generated by the electronic control part inside the gas sensor causes the combustible gas inside the gas sensor to explode, the ventilation device of the explosion-proof gas analyzer can also prevent the explosion flame from entering the process pipeline of the measured gas, and will not detonate the dangerous place outside the gas sensor, which complies with the regulations and requirements of GB / T3836 on the use of electrical equipment in explosive environments.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ventilation device for an explosion-proof gas analyzer, characterized in that: The invention comprises a mounting seat (2) and an external compression tube (8) which are arranged opposite to each other and connected together, one end of the external compression tube (8) is nested in the cavity of the mounting seat (2), a single closed fire-blocking tube (5) is installed in the mounting hole of the external compression tube (8) in the form of an L-shaped stop, the L-shaped stop is filled with epoxy resin glue (7), a compression gasket (3) is provided at the intersection of the single closed fire-blocking tube (5) and the mounting seat (2), the compression gasket (3) and the single closed fire-blocking tube (5) are fastened to the inside of the mounting seat (2) and the external compression tube (8), and a drainage groove (61) is provided on the compression gasket (3).

2. The ventilation device of the explosion-proof gas analysis instrument according to claim 1, characterized in that: An external space (10) is formed between the single enclosed fire-stop tube (5) and the mounting seat (2), and an internal space (11) is provided inside the single enclosed fire-stop tube (5).

3. The ventilation device of the explosion-proof gas analysis instrument according to claim 2, characterized in that: The closed ends of the compression gasket (3) and the single closed fire arrester tube (5) are placed in a direction adjacent to the internal double-ferrule joint (1), and the corresponding distal end of the internal double-ferrule joint (1) is provided with an external double-ferrule joint (9).

4. The ventilation device of the explosion-proof gas analysis instrument according to claim 3, characterized in that: The internal double-ferrule connector (1) is arranged inside the gas analyzer housing (21), and one end of the internal double-ferrule connector (1) away from the mounting seat (2) is connected to the gas analysis sensor (22) through a stainless steel thin-walled tube (23).

5. The ventilation device of the explosion-proof gas analysis instrument according to claim 4, characterized in that: The external compression tube (8) is connected to the mounting seat (2) via a combination thread (6); the mounting seat (2) is connected to the gas analyzer housing (21) via a mounting thread (4).

6. The ventilation device of the explosion-proof gas analysis instrument according to claim 1, characterized in that: The compression gasket (3) and the single closed fire arrester tube (5) are fastened to the inside of the external compression tube (8) and the mounting seat (2) in a threaded connection manner.

7. The ventilation device of the explosion-proof gas analysis instrument according to claim 1, characterized in that: The thickness of the epoxy resin glue (7) is 0.3 mm, and the total length of the epoxy resin glue (7) is 10 mm.

8. The ventilation device of the explosion-proof gas analysis instrument according to claim 1, characterized in that: The single closed fire arrester tube (5) is manufactured by a metal powder metallurgy process, and the single closed fire arrester tube (5) can prevent flame transmission while allowing gas to flow.

9. The ventilation device of an explosion-proof gas analysis instrument according to claim 1, characterized in that: The ventilation devices of the two sets of explosion-proof gas analysis instruments together form the gas inlet and outlet passages.

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