Flue gas fixed-point sampling gun and flue gas fixed-point sampling equipment

Abstract

The utility model provides a flue gas fixed-point sampling gun and a flue gas fixed-point sampling device, the flue gas fixed-point sampling gun comprises: a metal hose, an armored thermocouple, a support tube and a plug body, the metal hose has a sampling port, and the flue gas can flow into the metal hose through the sampling port; the support tube comprises a plurality of rigid short tubes, and the plurality of rigid short tubes are detachably connected end to end; the metal hose and the armored thermocouple are both arranged in the support tube, and the armored thermocouple extends to the outside of the front end of the support tube, and the sampling port is located outside the front end of the support tube; the plug body is installed on the support tube to seal the metal hose in the support tube and the cavity outside the armored thermocouple, thereby solving the technical problems of inconvenient carrying and complicated operation of the flue gas detection equipment of the boiler flue.

Description

Technical Field

[0001] The utility model relates to the technical field of coal-fired power station boilers, in particular to a flue gas fixed-point sampling gun and a flue gas fixed-point sampling device. Background Art

[0002] Flue gas composition is not only one of the main indicators of the combustion effect of large coal-fired power plant boilers, but also an important parameter for analyzing faults such as air leakage in important equipment such as air preheaters and dust collectors. Therefore, it is necessary to sample and test the boiler combustion process or exhaust flue gas to monitor the boiler combustion situation and ensure the boiler thermal efficiency and equipment sealing level. SO2, NO x etc. are air pollutants. In order to ensure that environmental protection equipment is monitored and emissions meet standards, it is also necessary to sample and test the flue gas to ensure that environmental protection equipment operates normally and that pollutant emissions from the total outlet meet standards.

[0003] At present, the flue gas sampling gun is mainly of the light tube type, which is a hollow stainless steel tube. Different lengths of flue gas sampling guns are selected according to the different cross-sectional dimensions of the flue. The cross-sectional dimensions of the flue of large coal-fired units are very large, and the corresponding sampling gun also needs to be very long. The overlong sampling gun is inconvenient to transport and carry.

[0004] In addition, when it is necessary to measure the flue gas temperature at the same time, the armored thermocouple should be tied to the sampling gun with iron wire or clamp. Thermocouple binding and removal are troublesome, and the clamp that fixes the thermocouple will affect the insertion and removal of the sampling gun.

[0005] In summary, the flue gas detection equipment for boiler flue has technical problems such as being inconvenient to carry and complicated to operate. Utility Model Content

[0006] The utility model aims to provide a flue gas fixed-point sampling gun and a flue gas fixed-point sampling device to solve the technical problems of inconvenient carrying and complicated operation of the flue gas detection equipment of the boiler flue.

[0007] The above-mentioned purpose of the utility model can be achieved by adopting the following technical solutions:

[0008] The utility model provides a smoke fixed-point sampling gun, comprising: a metal hose, an armored thermocouple, a support tube and a plug body, the metal hose having a sampling port, smoke can flow into the metal hose through the sampling port; the support tube comprises a plurality of rigid short tubes, and the plurality of rigid short tubes are detachably connected end to end; the metal hose and the armored thermocouple are both arranged in the support tube, and the armored thermocouple extends to the outside of the front end of the support tube, and the sampling port is located outside the front end of the support tube; the plug body is installed in the support tube to seal the cavity outside the metal hose and the armored thermocouple in the support tube.

[0009] In a preferred embodiment, a first connecting portion is provided at the head end of the rigid short tube, and / or a second connecting portion is provided at the tail end of the rigid short tube, and the first connecting portion and the second connecting portion are detachably connected.

[0010] In a preferred embodiment, the first connecting portion includes a first external thread groove located on the outer wall and a first internal thread protrusion located on the inner wall; the second connecting portion includes a second external thread groove located on the outer wall and a second internal thread protrusion located on the inner wall, and the first external thread groove cooperates with the second internal thread protrusion.

[0011] In a preferred embodiment, the outer wall of the first connecting portion has a first cylindrical portion, the first cylindrical portion and the first external thread groove are distributed along the longitudinal direction of the rigid short tube, and the first external thread groove is located on the outside of the first cylindrical portion; the inner wall of the second connecting portion has a second cylindrical portion, the second cylindrical portion and the second internal thread protrusion are distributed along the longitudinal direction of the rigid short tube, and the second cylindrical portion is located on the outside of the second internal thread protrusion.

[0012] In a preferred embodiment, the first connection portion is formed by roll forming, and the second connection portion is formed by roll forming.

[0013] In a preferred embodiment, the plug body has a longitudinal through hole, at least a portion of the outer wall of the plug body is sealingly matched with the inner wall of the support tube, and the metal hose and the armored thermocouple pass through the longitudinal through hole.

[0014] In a preferred embodiment, the plug body is a rubber plug, and the plug body is installed at the rear end of the support tube.

[0015] In a preferred embodiment, the inner diameter of the support tube is larger than the outer diameter of the metal hose and smaller than twice the outer diameter of the metal hose.

[0016] In a preferred embodiment, the sampling port is a front end of the metal hose, and the armored thermocouple extends to the front of the sampling port.

[0017] The utility model provides a smoke fixed-point sampling device, comprising: a smoke sampler and the above-mentioned smoke fixed-point sampling gun, wherein the tail end of the metal hose is connected to the smoke sampler.

[0018] The characteristics and advantages of this utility model are:

[0019] The metal hose and armored thermocouple can be rolled and folded by themselves, and the support tube provides support and positioning for the metal hose and the armored thermocouple. The number of rigid short tubes can be increased or decreased to adjust the length of the support tube. The front end of the support tube extends into the flue to control the depth of the support tube so as to adjust the position of the sampling port of the metal hose and the armored thermocouple, thereby performing flue gas sampling and temperature measurement at a fixed point, and can be adapted to flues of different cross-sectional sizes of various types of coal-fired units to ensure that the entire flue cross-section is covered and multi-point sampling is performed on the entire flue cross-section.

[0020] The support tube can be disassembled into multiple rigid short tubes, which are convenient for storage, carrying and transportation together with the rolled or folded metal hose and armored thermocouple. During assembly, the support tube accommodates and restricts the metal hose and armored thermocouple through its tube cavity and inner wall. The armored thermocouple does not need to use a fixed structure such as iron wire or clamp, and can be directly inserted into the support tube, which is convenient for assembly and disassembly. When in use, since the support tube wraps the metal hose and armored thermocouple, the sampling gun is roughly rod-shaped and has a relatively regular outer wall, which is easy to insert into the flue and pull out from the flue after the sampling and testing is completed.

[0021] The plug seals the metal hose in the support tube and the cavity outside the armored thermocouple. During sampling and testing, it can prevent the air in the support tube from flowing to the sampling port, thereby ensuring the sampling of the flue gas at the sampling port in the flue. The armored thermocouple detects the temperature of the flue gas at its location, reducing interference from external air and improving the accuracy of detection and sampling.

[0022] The flue gas fixed-point sampling gun provided by the utility model is a portable sampling gun, which solves the technical problems of inconvenient carrying and complicated operation of the flue gas detection equipment of the boiler flue, and is conducive to ensuring the accuracy of detection and sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0024] Figure 1 This is an overall schematic diagram of the smoke fixed-point sampling gun provided by the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of a rigid short tube in a smoke fixed-point sampling gun provided by the utility model;

[0026] Figure 3 It is a partial schematic diagram of the head end of the rigid short tube in the smoke fixed-point sampling gun provided by the utility model;

[0027] Figure 4 It is a partial schematic diagram of the tail end of the rigid short tube in the smoke fixed-point sampling gun provided by the utility model.

[0028] Description of Figure Numbers:

[0029] 10. Metal hose; 11. Sampling port;

[0030] 20. Armored thermocouple;

[0031] 30. Support tube; 40. Rigid short tube;

[0032] 51. first connecting portion; 52. first external thread groove; 53. first internal thread protrusion; 54. first cylindrical portion;

[0033] 61. second connecting portion; 62. second external thread groove; 63. second internal thread protrusion; 64. second cylindrical portion;

[0034] 70. plug body; 71. longitudinal through hole;

[0035] 80. Flue; 81. Test hole. DETAILED DESCRIPTION

[0036] 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.

[0037] Solution 1

[0038] The utility model provides a smoke fixed-point sampling gun, such as Figure 1 and Figure 2As shown, the flue gas fixed-point sampling gun includes: a metal hose 10, an armored thermocouple 20, a support tube 30 and a plug body 70. The metal hose 10 has a sampling port 11, and the flue gas can flow into the metal hose 10 through the sampling port 11; the support tube 30 includes a plurality of rigid short tubes 40, and the plurality of rigid short tubes 40 are detachably connected end to end; the metal hose 10 and the armored thermocouple 20 are both arranged in the support tube 30, and the armored thermocouple 20 extends to the outside of the front end of the support tube 30, and the sampling port 11 is located outside the front end of the support tube 30; the plug body 70 is installed in the support tube 30 to seal the cavity outside the metal hose 10 and the armored thermocouple 20 in the support tube 30.

[0039] The metal hose 10 and the armored thermocouple 20 can be rolled and folded by themselves, and the support tube 30 provides support and positioning for the metal hose 10 and the armored thermocouple 20. The number of rigid short tubes 40 is increased or decreased to adjust the length of the support tube 30. The front end of the support tube 30 extends into the flue 80, and the depth of the support tube 30 is controlled to control the position of the sampling port 11 of the metal hose 10 and the armored thermocouple 20, so as to perform flue gas sampling and temperature measurement at a fixed point, and can be adapted to flues 80 of different cross-sectional sizes of various types of coal-fired units to ensure that the entire flue 80 cross-section is covered, and multi-point sampling is performed on the entire flue 80 cross-section.

[0040] The support tube 30 can be disassembled into multiple rigid short tubes 40, which are convenient for storage, carrying and transportation together with the rolled or folded metal hose 10 and armored thermocouple 20. During assembly, the support tube 30 accommodates and restricts the metal hose 10 and the armored thermocouple 20 through its tube cavity and inner wall. The armored thermocouple 20 does not need to use a fixed structure such as iron wire or clamp, and can be directly inserted into the support tube 30, which is convenient for assembly and disassembly. During use, since the support tube 30 wraps the metal hose 10 and the armored thermocouple 20, the sampling gun is roughly rod-shaped and has a relatively regular outer wall, which is convenient for insertion into the flue 80 and removal from the flue 80 after sampling and testing.

[0041] The plug body 70 seals the metal hose 10 in the support tube 30 and the cavity outside the armored thermocouple. During sampling and detection, it can prevent the air in the support tube 30 from flowing to the sampling port 11, thereby ensuring the sampling of the flue gas at the sampling port 11 in the flue 80. The armored thermocouple 20 detects the temperature of the flue gas at its location, reduces the interference of external air, and improves the accuracy of detection and sampling.

[0042] The flue gas fixed-point sampling gun provided by the utility model is a portable sampling gun, which solves the technical problems of inconvenient carrying and complicated operation of the flue gas detection equipment of the boiler flue, and is conducive to ensuring the accuracy of detection and sampling.

[0043] In one embodiment, the first end of the rigid short tube 40 is provided with a first connection portion 51, and / or the tail end of the rigid short tube 40 is provided with a second connection portion 61, and the first connection portion 51 and the second connection portion 61 can be detachably connected. The first connection portion 51 cooperates with the second connection portion 61 to connect the head end of one rigid short tube 40 to the tail end of another rigid short tube 40. The rigid short tube 40 at the end of the support tube 30 can be provided with the first connection portion 51 only at the head end, or the second connection portion 61 only at the tail end; the rigid short tube 40 in the middle is provided with the first connection portion 51 and the second connection portion 61.

[0044] Furthermore, if Figure 2-Figure 4 As shown, the first connection part 51 includes a first external thread groove 52 located on the outer wall and a first internal thread protrusion 53 located on the inner wall; the second connection part 61 includes a second external thread groove 62 located on the outer wall and a second internal thread protrusion 63 located on the inner wall, and the first external thread groove 52 matches the second internal thread protrusion 63. The rigid short tube 40 can be made of a thin-walled stainless steel tube. The tube wall of the rigid short tube 40 is processed to form the first external thread groove 52 and the first internal thread protrusion 53 is formed at the same time, and the second external thread groove 62 is processed and formed. The second internal thread protrusion 63 is formed at the same time, which is easy to process; and the first external thread groove 52 and the second internal thread protrusion 63 can be reliably connected together during assembly to ensure sealing. Compared with the sealing material using raw tape as threaded connection, the high temperature resistance is better. The support tube 30 has good rigidity and can maintain a straight shape after entering the flue 80 to protect the armored thermocouple 20 and the metal hose 10 inside. The length of the rigid short tube 40 can be customized, and the total length of the support tube 30 can be freely assembled according to the cross-sectional size of the flue 80.

[0045] Further, the outer wall of the first connecting portion 51 has a first cylindrical portion 54, the first cylindrical portion 54 and the first external thread groove 52 are distributed along the longitudinal direction of the rigid short tube 40, and the first external thread groove 52 is located outside the first cylindrical portion 54; the inner wall of the second connecting portion 61 has a second cylindrical portion 64, the second cylindrical portion 64 and the second internal thread protrusion 63 are distributed along the longitudinal direction of the rigid short tube 40, and the second cylindrical portion 64 is located outside the second internal thread protrusion 63. While the first external thread groove 52 is threadedly engaged with the second internal thread protrusion 63, the first cylindrical portion 54 cooperates with the second cylindrical portion 64, so that the two rigid short tubes 40 are connected more securely.

[0046] Preferably, the first connection part 51 is formed by roll forming, and the second connection part 61 is formed by roll forming, which is conducive to efficiently processing the first connection part 51 and the second connection part 61 at the end of the thin-walled stainless steel pipe. The first external thread groove 52 is an external tapered thread, and the second internal thread protrusion 63 is an internal tapered thread. The wall thickness of the first connection part 51 and the second connection part 61 is uniform and consistent with the thickness of the rigid short tube 40, which is conducive to overcoming the problem of fatigue fracture and leakage caused by temperature difference stress at the connection; and the connection is smooth, without obvious diameter change and boss, which is convenient for the sampling gun to be plugged in and out of the test hole 81 of the flue 80. The support tube 30 is connected to each other by tapered threads, and the diameter is almost unchanged. The rigid short tubes 40 can be directly connected by hand.

[0047] In one embodiment, the rigid short tube 40 in the support tube 30 is a thin-walled stainless steel tube. The length of a single rigid short tube 40 can be customized, for example, the length can be customized to 55 cm. The two ends of the rigid short tube 40 are respectively provided with a first connection portion 51 and a second connection portion 61, and the length of the inner tapered thread and the outer tapered thread are 5 cm respectively. The support tube 30 can be obtained by connecting several thin-walled stainless steel tubes end to end. Preferably, there is a length scale on the outer wall of the thin-walled stainless steel tube.

[0048] In one embodiment, the plug body 70 has a longitudinal through hole 71, at least a portion of the outer wall of the plug body 70 is sealed with the inner wall of the support tube 30, and the metal hose 10 and the armored thermocouple 20 pass through the longitudinal through hole 71. The plug body 70 can prevent the flow of air in the support tube 30, thereby preventing the air carried in the support tube 30 from interfering with the flue gas sampling and temperature detection.

[0049] Furthermore, the plug body 70 is a rubber plug, and the plug body 70 is installed at the tail end of the support tube 30. The rubber plug seals the tail end of the support tube 30, so that during detection and sampling, although there is air in the support tube 30, since the airflow cannot enter from the tail end of the support tube 30, the support tube 30 is a blind tube, so that under the action of air pressure, the air in the support tube 30 will not flow out from its front end in large quantities, thus avoiding the air in the support tube 30 from interfering with the flue gas sampling and temperature detection, so that the rubber plug can be installed at the tail end of the support tube 30 to avoid being damaged by the high temperature in the flue 80. At the same time, the inner wall of the longitudinal through hole 71 of the rubber plug can be closely matched with the metal hose 10 and the armored thermocouple 20, and play a fixing role for the metal hose 10 and the armored thermocouple 20.

[0050] In one embodiment, the plug body 70 is a rubber plug made of rubber material. Part of the outer wall of the plug body 70 can be threadedly matched with the support tube 30. The plug body 70 is screwed in from the tail end of the support tube 30 to fix the armored thermocouple 20 and the metal hose 10. It can also seal the tail end of the support tube 30, reduce air leakage at the tail end of the support tube 30, and ensure the accuracy of flue gas sampling and temperature measurement.

[0051] Furthermore, the inner diameter of the support tube 30 is larger than the outer diameter of the metal hose 10 and smaller than twice the outer diameter of the metal hose 10, which makes it easy to insert the metal hose 10 into the support tube 30. At the same time, the tube cavity of the support tube 30 can limit the metal hose 10, thereby preventing the metal hose 10 from moving significantly in the support tube 30 and ensuring that the position of the metal hose 10 remains stable. The support tube 30 does not need to be provided with a fixing structure for fixing the metal hose 10 and the armored thermocouple 20.

[0052] In one embodiment, the sampling port 11 is the front port of the metal hose 10, and the armored thermocouple 20 extends to the front of the sampling port 11. The flue gas enters the metal hose 10 from the front port of the metal hose 10. The front end of the metal hose 10 is the sampling position, which is convenient for adjusting the sampling position and avoiding interference between flue gas sampling and temperature detection.

[0053] The armored thermocouple 20 can be rolled up and coiled into a circle according to a certain diameter, thereby reducing the overall length. In one embodiment, the circle of the armored thermocouple 20 after rolling up has a diameter of less than 40 cm. When in use, the armored thermocouple 20 is arranged into a straight shape and inserted into the support tube 30. Specifically, the armored thermocouple 20 includes a probe and a cable, and the cable can be rolled up; the probe has a diameter of about 3 mm and a length of about 100 mm, and the cable length can reach 1500 mm, and the probe diameter, probe length, and cable length can all be customized.

[0054] In one embodiment, the metal hose 10 is a stainless steel corrugated hose, which can be rolled up and coiled into a circle according to a certain diameter, thereby reducing the overall length. The diameter of the circle after the stainless steel corrugated hose is rolled up is less than 40 cm. Circular joints with an outer diameter of 1 cm and a length of 5 cm are set at both ends of the stainless steel corrugated hose to facilitate the connection between the hose and the flue gas sampler. The stainless steel corrugated hose has good sealing performance, but insufficient rigidity. After being inserted into the flue 80 alone, it cannot maintain a straight shape. When in use, the stainless steel corrugated hose is arranged into a straight shape and inserted into the support tube 30 for use. The outer diameter and length of the stainless steel corrugated hose can be customized, the joints at both ends can be customized, and the minimum bending radius can also be customized.

[0055] In one embodiment, the armored thermocouple 20 has a length of 2.2 meters, 3.2 meters, 4.2 meters, 5.2 meters, etc. The metal hose 10 has a length of 2.2 meters, 3.2 meters, 4.2 meters, 5.2 meters, etc. The length of a single rigid short tube 40 is 55 cm, and the combined support tube 30 has specifications such as 2.05 meters, 3.05 meters, 4.05 meters, and 5.05 meters. The armored thermocouple 20, the metal hose 10, the rigid short tube 40, and the plug body 70 are placed in a transport box of 0.5 meters × 0.5 meters × 0.2 meters for easy transportation and carrying. The flue gas fixed-point sampling gun is suitable for a variety of application scenarios.

[0056] (1) Application scenario 1

[0057] The transport box contains a 5.2-meter armored thermocouple 20 , a 5.2-meter metal hose 10 , 10 sections of 55-centimeter rigid short pipes 40 , and a plug body 70 .

[0058] After arriving at the test site, 10 sections of 55 cm rigid short pipes 40 were assembled into a 5.05 m support pipe 30 by hand.

[0059] Arrange the armored thermocouple 20 and the metal hose 10 into a straight state by hand, and then insert them into the support tube 30. The armored thermocouple 20 and the metal hose 10 need to extend about 0.1 meters from the air inlet of the support tube 30 to ensure the accuracy of flue gas sampling and temperature measurement. The tail end is fixed and sealed with a plug 70.

[0060] In this way, the on-site assembly of the flue gas fixed-point sampling gun is completed.

[0061] There are length scales on the outer wall of the rigid short tube 40 to facilitate determination of the depth to which the sampling gun is inserted into the flue 80 .

[0062] The connection of the support tube 30 is smooth without obvious diameter change and boss, and the overall weight of the sampling gun is light, which facilitates the insertion and removal of the sampling gun in the test hole 81 of the flue 80 .

[0063] (2) Application scenario 2

[0064] The difference from application scenario 1 is that after arriving at the test site, a 3.05-meter sampling gun is actually needed to assemble 6 sections of 55-cm rigid short tubes 40 into a 3.05-meter support tube 30 by hand. The remaining longer armored thermocouple 20 and metal hose 10 at the tail end can be rolled up and fixed so as not to affect the flue gas sampling. In this way, the on-site assembly of the flue gas fixed-point sampling gun is completed.

[0065] (3) Application scenario 3

[0066] The transport box contains armored thermocouples 20 of 2.2 m, 3.2 m, 4.2 m, and 5.2 m in size, metal hoses 10 of 2.2 m, 3.2 m, 4.2 m, and 5.2 m in size, 10 sections of 55 cm rigid short pipes 40, and 2 plugs 70.

[0067] After arriving at the test site, two sampling guns are actually needed, one 3.05-meter sampling gun and one 2.05-meter sampling gun.

[0068] Assemble six 55 cm rigid short tubes 40 into a 3.05 m support tube 30 by hand. Arrange the 3.2 m armored thermocouple 20 and metal hose 10 into a straight state by hand, and then insert them into the support tube 30. The armored thermocouple 20 and metal hose 10 need to extend about 0.1 m from the air inlet of the support tube 30 to ensure the accuracy of flue gas sampling and temperature measurement. The tail end is fixed and sealed with a plug 70.

[0069] Assemble four 55 cm rigid short tubes 40 into a 2.05 m support tube 30 by hand. Arrange the 2.2 m armored thermocouple 20 and metal hose 10 into a straight state by hand, and then insert them into the support tube 30. The armored thermocouple 20 and metal hose 10 need to extend about 0.1 m from the air inlet of the support tube 30 to ensure the accuracy of flue gas sampling and temperature measurement. The tail end is fixed and sealed with a plug 70.

[0070] In this way, the on-site assembly of two flue gas fixed-point sampling guns was completed.

[0071] (4) Application scenario 4

[0072] Different from application scenario 3, after arriving at the test site, a 3.05-meter sampling gun is actually needed, and only smoke sampling is required. Six 55-cm rigid short tubes 40 are assembled into a 3.05-meter support tube 30 by hand.

[0073] The 3.2-meter metal hose 10 is straightened by hand and then inserted into the support tube 30. The metal hose 10 needs to extend about 0.1 meters from the air inlet of the support tube 30 to ensure the accuracy of smoke sampling. The tail end is fixed and sealed with a plug 70.

[0074] In this way, the on-site assembly of the flue gas fixed-point sampling gun is completed.

[0075] (5) Application scenario 5

[0076] Different from application scenario 3, after arriving at the test site, a 3.05-meter sampling gun is actually needed, and only the flue gas temperature test is required. Six 55-cm rigid short tubes 40 are assembled into a 3.05-meter support tube 30 by hand.

[0077] The 3.2-meter armored thermocouple 20 is straightened by hand and then inserted into the support tube 30. The armored thermocouple 20 needs to extend about 0.1 meters from the air inlet of the support tube 30 to ensure the accuracy of temperature measurement. The tail end is fixed and sealed with a plug 70.

[0078] In this way, the on-site assembly of the flue gas fixed-point sampling gun is completed.

[0079] The smoke fixed-point sampling gun provided by the utility model has the following features:

[0080] (1) A metal hose 10 with good sealing performance is used to extract smoke from the flue 80. The metal hose 10 can be rolled up to form a circle according to a certain diameter, thereby reducing the overall length of the sampling gun during transportation;

[0081] (2) Both ends of the metal hose 10 are made into joints with an outer diameter of 1 cm to facilitate the connection between the hose and the smoke sampler;

[0082] (3) Each section of the rigid short tube 40 is short, which is convenient for transportation and carrying; after assembling multiple sections of the rigid short tube 40, a support tube 30 of an ideal length can be obtained;

[0083] (4) Both ends of each rigid short tube 40 are provided with an inner tapered thread and an outer tapered thread, respectively, so as to facilitate the connection and disassembly of the rigid short tube 40 and the connection and disassembly of the support tube 30 can be completed by hand;

[0084] (5) The threaded support tube 30 has good rigidity and can maintain a straight shape after entering the flue 80, thereby ensuring the accuracy of flue gas sampling;

[0085] (6) The support tube 30 can also protect the internal armored thermocouple 20 and the metal hose 10;

[0086] (7) The sampling gun composed of the metal hose 10 and the support tube 30 is resistant to high temperatures and will not deform or soften in high-temperature flue gas, nor will it react with high-temperature flue gas;

[0087] (8) The sampling gun composed of the armored thermocouple 20 and the metal hose 10 inserted into the support tube 30 can ensure both the sealing and the rigidity of the sampling gun;

[0088] (9) The sampling gun composed of the armored thermocouple 20 and the metal hose 10 inserted into the support tube 30 can perform flue gas sampling and temperature measurement at the same time;

[0089] (10) A sampling gun composed of a metal hose 10 inserted into a support tube 30 can be used for smoke sampling only;

[0090] (11) A sampling gun composed of the armored thermocouple 20 inserted into the support tube 30 can only perform temperature measurement;

[0091] (12) There is a plug body 70 at the tail of the sampling gun. The fixed sealing plug is made of rubber material and matches the thread of the support tube 30. It is screwed into the tail of the support tube 30 to fix the armored thermocouple 20 and the metal hose 10. It can also seal the tail of the support tube 30, reduce air leakage at the tail of the support tube 30, and ensure the accuracy of flue gas sampling and temperature measurement;

[0092] (13) The sampling gun assembly can be connected and disassembled by hand;

[0093] (14) After disassembly and reeling, the sampling gun can be placed in a transport box of 0.5 m × 0.5 m × 0.2 m, which is convenient for transportation and carrying;

[0094] (15) There are length scales on the outer wall of the sampling gun to facilitate determination of the depth of the sampling gun inserted into the flue 80;

[0095] (16) The connection of the sampling gun is smooth, without obvious diameter change and boss, and the overall weight of the sampling gun is light, which facilitates the insertion and removal of the sampling gun in the test hole 81 of the flue 80.

[0096] Solution 2

[0097] The utility model provides a smoke fixed-point sampling device, comprising: a smoke sampler and the above-mentioned smoke fixed-point sampling gun, and the tail end of a metal hose 10 is connected to the smoke sampler.

[0098] The smoke fixed-point sampling device has all or at least part of the characteristics and beneficial effects of the above-mentioned smoke fixed-point sampling gun, which will not be described in detail here.

[0099] The metal hose 10 can be connected to the smoke sampler through other hoses.

[0100] The above are only several embodiments of the present invention. Those skilled in the art can make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A flue gas fixed-point sampling gun, characterized in that: include: A metal hose, an armored thermocouple, a support tube and a plug body, wherein the metal hose has a sampling port, and smoke can flow into the metal hose through the sampling port; the support tube includes a plurality of rigid short tubes, and the plurality of rigid short tubes are detachably connected end to end; the metal hose and the armored thermocouple are both arranged in the support tube, and the armored thermocouple extends to the outside of the front end of the support tube, and the sampling port is located outside the front end of the support tube; The plug body is installed on the support tube to seal the metal hose in the support tube and the cavity outside the armored thermocouple.

2. The flue gas fixed-point sampling gun according to claim 1, characterized in that: The head end of the rigid short tube is provided with a first connection part, and / or the tail end of the rigid short tube is provided with a second connection part, and the first connection part and the second connection part can be detachably connected.

3. The flue gas fixed-point sampling gun according to claim 2, characterized in that: The first connecting portion includes a first external thread groove located on the outer wall and a first internal thread protrusion located on the inner wall; The second connecting portion includes a second external thread groove located on the outer wall and a second internal thread protrusion located on the inner wall, and the first external thread groove matches the second internal thread protrusion.

4. The smoke fixed-point sampling gun according to claim 3, characterized in that: The outer wall of the first connecting portion has a first cylindrical portion, the first cylindrical portion and the first external thread groove are distributed along the longitudinal direction of the rigid short tube, and the first external thread groove is located on the outer side of the first cylindrical portion; The inner wall of the second connecting portion has a second cylindrical portion, the second cylindrical portion and the second internally threaded protrusion are distributed along the longitudinal direction of the rigid short tube, and the second cylindrical portion is located outside the second internally threaded protrusion.

5. The smoke fixed-point sampling gun according to claim 3, characterized in that: The first connection part is formed by roll forming, and the second connection part is formed by roll forming.

6. The smoke fixed-point sampling gun according to claim 1, characterized in that: The plug body has a longitudinal through hole, at least a portion of the outer wall of the plug body is sealed and matched with the inner wall of the support tube, and the metal hose and the armored thermocouple pass through the longitudinal through hole.

7. The smoke fixed-point sampling gun according to claim 6, characterized in that: The plug body is a rubber plug, and the plug body is installed at the tail end of the support tube.

8. The smoke fixed-point sampling gun according to claim 7, characterized in that: The inner diameter of the support tube is larger than the outer diameter of the metal hose and smaller than twice the outer diameter of the metal hose.

9. The smoke fixed-point sampling gun according to claim 1, characterized in that: The sampling port is the front end of the metal hose, and the armored thermocouple extends to the front of the sampling port.

10. A flue gas fixed-point sampling device, characterized in that: include: A smoke sampler and a smoke fixed-point sampling gun according to any one of claims 1 to 9, wherein the tail end of the metal hose is connected to the smoke sampler.

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