Gas sensor used in gas pipeline

Abstract

The utility model relates to a gas sensor used in a gas pipeline, which belongs to the field of infrared gas sensors and comprises a butt joint piece butted on the pipeline, a mounting seat is arranged on the outer side of the butt joint piece, a fastening groove is arranged on the outer side of the mounting seat towards the axis of the butt joint piece, and the fastening groove is provided with a fastening groove. An insertion groove penetrating through the side wall of the butt joint piece is formed in the inner wall of the fastening groove, an infrared gas sensor extending into the butt joint piece is embedded in the insertion groove, and the infrared gas sensor comprises a body part inserted into the insertion groove and a contact part arranged at the end, facing the axis of the butt joint piece, of the body part; and the infrared gas sensor is mounted in the fastening groove through a fastener. When the gas sensor used in the gas transmission pipeline is installed, the butt joint piece is arranged between the gas transmission pipelines, and the infrared gas sensor is inserted from the outer side of the installation base until the limiting ring abuts against the inner wall of the fastening groove in the installation base; and then the fastener sleeves the extension part in the infrared gas sensor and is screwed into the mounting seat, so that the infrared gas sensor can be mounted, and the operation is simple and quick.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared gas sensors, in particular to a gas sensor used inside a gas transmission pipeline. Background Art

[0002] Infrared gas sensor is a gas sensing device that is based on the near-spectral selective absorption characteristics of different gas molecules and uses the relationship between gas concentration and absorption intensity to identify gas components and determine their concentration.

[0003] Compared with other types of infrared gas sensors such as electrochemical, catalytic combustion, semiconductor, etc., infrared gas sensors have a series of advantages such as wide application, long service life, high sensitivity, good stability, suitable for many gases, high cost performance, low maintenance cost, online analysis, etc. It is widely used in petrochemical, metallurgical industry, mining, air pollution detection, agriculture, medical and health fields;

[0004] Infrared gas sensors are generally installed inside pipelines to detect the gas transported inside the pipelines.

[0005] After the infrared gas sensor is installed in the pipeline, the pipeline needs to be sealed. The sealed pipeline needs to be reopened when the infrared gas sensor is repaired, which makes it more troublesome to repair the infrared gas sensor. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a gas sensor for use inside a gas transmission pipeline, which has the advantages of convenient and quick installation and maintenance.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas sensor for use inside a gas transmission pipeline, comprising a docking piece docked on the pipeline, a mounting seat being provided on the outside of the docking piece, a fastening groove being provided on the outside of the mounting seat toward the axis of the docking piece, a slot penetrating the side wall of the docking piece being provided on the inner wall of the fastening groove, an infrared gas sensor extending to the interior of the docking piece being embedded in the slot, the infrared gas sensor comprising a main body portion inserted in the slot, a contact portion arranged at one end of the main body portion facing the axis of the docking piece, an extension portion arranged at the other end of the main body portion, a limit ring arranged on the outer wall of the extension portion and located in the fastening groove, the infrared gas sensor being installed in the fastening groove by a fastener, the fastener comprising a fastening nut sleeved on the surface of the extension portion and threadedly connected to the fastening groove, and a torsion bar welded to the side wall of the fastening nut.

[0008] Furthermore, the docking piece includes a transition pipe, both ends of the inner wall of the transition pipe are provided with docking grooves, and also includes connecting flange rings integrally formed on the side walls of both ends of the transition pipe.

[0009] Furthermore, the fastening groove is a cylindrical groove with threads, and the inner diameter of the slot is smaller than the inner diameter of the fastening groove.

[0010] Furthermore, a shield wrapping the contact portion is installed on the outer peripheral thread of one end of the main body facing the axis of the transition pipe and located at the contact portion, and the shield is a hollow shield.

[0011] Furthermore, a wire with a plug is inserted into one end of the extension portion away from the main body portion.

[0012] Furthermore, the extension portion is cylindrical, and the axis of the fastening nut is provided with a through hole adapted to the extension portion. The extension portion and the fastening nut simultaneously satisfy both sliding and rotating connection relationships. The thread of the fastening nut is arranged on the outer wall of the fastening nut, and the end of the fastening nut away from the axis of the transition tube is evenly provided with three clamping holes around the through hole.

[0013] Furthermore, the diameter of the limiting ring is larger than the inner diameter of the slot, and a sealing ring is sleeved on the surface of the extension portion and located between the limiting ring and the fastening nut.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] When installing the gas sensor used inside the gas transmission pipeline, the docking piece is arranged between the gas transmission pipeline, and the pipeline and the connecting flange ring in the docking piece are tightly connected together by bolts, and then the infrared gas sensor is inserted from the outside of the mounting seat until the limit ring abuts against the inner wall of the fastening groove in the mounting seat, and then the fastener is sleeved on the extension part in the infrared gas sensor and screwed into the mounting seat to complete the installation of the infrared gas sensor. When repairing, it is only necessary to screw the fastener out of the mounting seat to pull out the infrared gas sensor, which is simple and quick to operate. In addition, the contact part is extended into the transition pipe, which increases the area in contact with the gas and improves the test accuracy of the infrared gas sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the utility model from a front-down perspective;

[0017] Figure 2 This is a schematic diagram of the utility model from a rear top view;

[0018] Figure 3 This is a schematic cross-sectional view of the mounting base of the utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the infrared gas sensor of the utility model;

[0020] Figure 5 It is a schematic cross-sectional view of the fastener of the utility model.

[0021] In the figure: 1. docking piece; 11. transition pipe; 12. docking groove; 13. connecting flange ring; 2. mounting seat; 21. fastening groove; 22. slot; 3. infrared gas sensor; 31. main body; 32. protective cover; 33. contact part; 34. extension part; 35. limit ring; 36. wire; 4. fastener; 41. fastening nut; 42. torsion bar; 43. clamping hole; 44. sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 A gas sensor for use inside a gas pipeline comprises a docking piece 1 docked on the pipeline.

[0024] The docking piece 1 comprises a transition pipe 11 , both ends of the inner wall of the transition pipe 11 are provided with docking grooves 12 , and also comprises connecting flange rings 13 integrally formed on the side walls of both ends of the transition pipe 11 .

[0025] It should be noted that the diameter of the docking groove 12 is the same as the outer diameter of the gas conveying pipe. During installation, the gas conveying pipe needs to be inserted into the docking groove 12. At the same time, in order to ensure the sealing effect, a sealing ring can be placed on the inner wall of the docking groove 12 before docking.

[0026] A flange is also welded to the outside of the gas delivery pipeline. After docking, the pipeline, the flange and the connecting flange ring 13 are connected together by bolts.

[0027] See also Figure 3-5 A mounting seat 2 is provided on the outside of the docking member 1, a fastening groove 21 is provided on the outside of the mounting seat 2 toward the axis of the docking member 1, a slot 22 penetrating the side wall of the docking member 1 is provided on the inner wall of the fastening groove 21, an infrared gas sensor 3 extending to the inside of the docking member 1 is embedded in the slot 22, and the infrared gas sensor 3 includes a main body 31 inserted in the slot 22, a contact portion 33 arranged at one end of the main body 31 facing the axis of the docking member 1, an extension portion 34 arranged at the other end of the main body 31, and a limit ring 35 arranged on the outer wall of the extension portion 34 and located in the fastening groove 21, the extension portion 34 is cylindrical, and a wire 36 with a plug is inserted at the end of the extension portion 34 away from the main body 31.

[0028] See also Figure 3The fastening groove 21 is a cylindrical groove with threads, and the inner diameter of the slot 22 is smaller than the inner diameter of the fastening groove 21 . Secondly, the diameter of the limiting ring 35 is larger than the inner diameter of the slot 22 .

[0029] See also Figure 4 A shield 32 wrapping the contact portion 33 is installed on one end of the main body 31 facing the axis of the transition pipe 11 and is located on the outer periphery of the contact portion 33 , and the shield 32 is a hollow shield.

[0030] The infrared gas sensor 3 is installed in the fastening groove 21 through the fastener 4 .

[0031] See also Figure 5 The fastener 4 includes a fastening nut 41 which is sleeved on the surface of the extension portion 34 and threadedly connected to the fastening groove 21 , and a torsion rod 42 which is welded to the side wall of the fastening nut 41 .

[0032] It should be noted here that the axis of the fastening nut 41 is provided with a through hole adapted to the extension portion 34 , the extension portion 34 and the fastening nut 41 simultaneously satisfy both sliding and rotating connection relationships, and the thread of the fastening nut 41 is arranged on the outer wall of the fastening nut 41 .

[0033] In order to facilitate the operation of the workers, three clamping holes 43 are evenly opened around the through hole at one end of the fastening nut 41 away from the axis of the transition tube 11, so that the workers can contact the three-jaw chuck to turn the fastening nut 41, thereby ensuring that the fastening nut 41 can be tightly screwed into the fastening groove 21.

[0034] At the same time, in order to improve the sealing effect and prevent gas from escaping from the fastening groove 21 , a sealing ring 44 is sleeved on the surface of the extension portion 34 and between the limiting ring 35 and the fastening nut 41 .

[0035] The working principle of the above embodiment is as follows: during installation, the gas delivery pipe is inserted into the docking groove 12, and the pipe and the connecting flange ring 13 in the docking member 1 are tightly connected together by bolts, and then the infrared gas sensor 3 is inserted from the outside of the mounting seat 2 until the limit ring 35 abuts against the inner wall of the fastening groove 21 in the mounting seat 2, and then the fastener 4 is sleeved onto the extension portion 34 in the infrared gas sensor 3 and screwed into the mounting seat 2 to complete the installation of the infrared gas sensor 3. During maintenance, the infrared gas sensor 3 can be pulled out by simply unscrewing the fastener 4 out of the mounting seat 2.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas sensor for use in a gas pipeline, comprising a docking piece (1) docked on the pipeline, characterized in that: The docking member (1) is provided with a mounting seat (2) on its outer side, a fastening groove (21) is provided on its outer side in the direction of the axis of the docking member (1), a slot (22) penetrating the side wall of the docking member (1) is provided on the inner wall of the fastening groove (21), an infrared gas sensor (3) extending into the interior of the docking member (1) is embedded in the slot (22), and the infrared gas sensor (3) comprises a main body (31) inserted into the slot (22), a gas sensor (3) arranged on the main body (31) and facing the docking member (1), and a gas sensor (3) disposed on the main body (31) and extending toward the docking member (1). ) a contact portion (33) at one end of the axis, an extension portion (34) arranged at the other end of the main body portion (31), and a limit ring (35) arranged on the outer wall of the extension portion (34) and located in the fastening groove (21); the infrared gas sensor (3) is installed in the fastening groove (21) through a fastener (4); the fastener (4) includes a fastening nut (41) sleeved on the surface of the extension portion (34) and threadedly connected to the fastening groove (21), and a torsion bar (42) welded to the side wall of the fastening nut (41).

2. A gas sensor for use in a gas pipeline according to claim 1, characterized in that: The docking piece (1) comprises a transition pipe (11), both ends of the inner wall of the transition pipe (11) are provided with docking grooves (12), and also comprises connecting flange rings (13) integrally formed on the side walls at both ends of the transition pipe (11).

3. A gas sensor for use in a gas pipeline according to claim 1, characterized in that: The fastening groove (21) is a cylindrical groove with threads, and the inner diameter of the slot (22) is smaller than the inner diameter of the fastening groove (21).

4. A gas sensor for use in a gas pipeline according to claim 2, characterized in that: A protective cover (32) is installed on the outer peripheral thread of the contact part (33) at one end of the main body (31) facing the axis of the transition pipe (11), and the protective cover (32) wraps the contact part (33). The protective cover (32) is a hollow protective cover.

5. The gas sensor for use in a gas pipeline according to claim 1, characterized in that: A wire (36) with a plug is inserted into one end of the extension portion (34) away from the main body portion (31).

6. A gas sensor for use in a gas pipeline according to claim 1, characterized in that: The extension part (34) is cylindrical, and a through hole adapted to the extension part (34) is opened at the axis of the fastening nut (41). The extension part (34) and the fastening nut (41) simultaneously satisfy both sliding and rotating connection relationships. The thread of the fastening nut (41) is arranged on the outer wall of the fastening nut (41), and three clamping holes (43) are evenly opened around the through hole at one end of the fastening nut (41) away from the axis of the transition tube (11).

7. A gas sensor for use in a gas pipeline according to claim 1, characterized in that: The diameter of the limiting ring (35) is larger than the inner diameter of the slot (22), and a sealing ring (44) is sleeved on the surface of the extension portion (34) and located between the limiting ring (35) and the fastening nut (41).

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