Power station boiler flue gas sampling device

Abstract

The utility model provides a power station boiler flue gas sampling device, and particularly relates to the technical field of power station boiler flue gas sampling, the power station boiler flue gas sampling device comprises a boiler flue gas discharge pipe, when sampling is needed, only a control valve needs to be opened, gas enters from a connecting pipe, passes through the control valve and is discharged into a gas sampling bag from a joint pipe, sampling is carried out, and the sampling efficiency is greatly improved. When a gas sampling bag needs to be installed, an insertion pipe is inserted into an insertion hole, a sealing ring is extruded, one end of a buckle is made to make contact with a fixing disc, a guiding effect is achieved through an arc face arranged on the outer side of one end of the buckle, the buckle deforms to penetrate through a through groove, and the gas sampling bag is installed in the through groove. The buckle rebounds to be hooked on one side of the fixing disc so as to be connected and fixed, and then the insertion pipe is rotated to drive the fixing disc to rotate, so that the limiting rod on the buckle is rotated into the limiting groove, and secondary limiting and falling prevention are carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of power station boiler flue gas sampling, in particular to a power station boiler flue gas sampling device. Background Art

[0002] Coal-fired boilers in thermal power plants generate large amounts of exhaust gas during operation, including nitrogen oxides, sulfur oxides, and fly ash. To better control and reduce pollutants in power plant boiler exhaust, better monitoring of pollutants in the flue gas is necessary. The existing approach involves installing multiple flue gas monitoring devices at different heights in the flue gas duct. However, since boiler flue gas is high-temperature and dusty, it can easily cause irreparable damage to the monitoring equipment. During boiler flue gas emissions, it is necessary to check whether the emissions are qualified, which requires sampling and collection of boiler flue gas. Summary of the Invention

[0003] The purpose of the utility model is to provide a power station boiler flue gas sampling device to solve the problem that when boiler flue gas is discharged, it is necessary to check whether the discharge is qualified, and the boiler flue gas needs to be sampled and collected.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power station boiler flue gas sampling device, comprising a boiler exhaust pipe, a connecting pipe fixedly connected to the outside of the boiler exhaust pipe, one end of the connecting pipe fixedly connected to a first flange, a control valve provided on one side of the first flange, a second flange provided on one side of the control valve, a connecting pipe fixedly connected to one side of the second flange, a cannula inserted into the inner side of one end of the connecting pipe, one end of the cannula connected to a gas sampling bag through an air valve, and a connecting mechanism provided between the connecting pipe and the cannula.

[0005] Preferably, the first flange is connected to the air inlet side of the control valve through bolts, and the air outlet side of the control valve is connected to the second flange through bolts.

[0006] Preferably, the cannula is connected to the gas sampling bag through an air valve.

[0007] Preferably, the connecting mechanism includes a socket, a fixing groove, a sealing ring, a buckle, a limiting rod, a fixing plate, a through groove and a limiting groove. A socket is provided on the inner side of the joint tube, a fixing groove is provided at one end of the inner cavity of the socket, a sealing ring is provided on the inner side of the fixing groove, a buckle is fixedly connected to the outer side of the joint tube, a limiting rod is fixedly connected to the outer side of the buckle, a fixing plate is fixedly connected to the outer side of the insert tube, a through groove is provided on the outer side of the fixing plate, and a limiting groove is provided on the inner cavity side wall of the through groove.

[0008] Preferably, four buckles are provided, and an arc surface is provided on the outer side of one end of the buckle, and the outer wall of the insert tube fits with the inner wall of the socket.

[0009] Preferably, four through slots are provided.

[0010] Compared with the prior art, the beneficial effect of the present invention is that when the power station boiler flue gas sampling device is in use, when sampling is required, it is only necessary to open the control valve, and the gas enters from the connecting pipe and is discharged from the connecting pipe into the gas sampling bag through the control valve for sampling, and then the control valve is closed, thereby completing the effect of power station boiler flue gas sampling. When the gas sampling bag needs to be installed, the cannula is inserted into the jack, and the sealing ring is squeezed so that one end of the buckle contacts the fixed disk. The arc surface set on the outside of one end of the buckle plays a guiding role, causing the buckle to deform and pass through the through groove. The buckle rebound hook is hung on one side of the fixed disk, thereby connecting and fixing. Then the cannula is rotated to drive the fixed disk to rotate, so that the limit rod on the buckle is turned into the limit groove, thereby performing secondary limit and anti-slip. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the connecting pipe and the control valve of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the through slot and the limit slot in the utility model;

[0014] Figure 4 It is a schematic diagram of the structure of the matching jack and fixing slot of the utility model.

[0015] In the figure: 1. Boiler exhaust pipe; 2. Connecting pipe; 3. First flange; 5. Control valve; 7. Second flange; 8. Connecting pipe; 9. Insert pipe; 10. Gas storage bag; 11. Insert hole; 12. Fixing groove; 13. Sealing ring; 14. Buckle; 15. Limit rod; 16. Fixing plate; 17. Through groove; 18. Limit groove. DETAILED DESCRIPTION

[0016] The following will be combined with the 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 without making creative efforts are within the scope of protection of the present invention.

[0017] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application. Example

[0018] See also Figure 1-4 The utility model provides a power station boiler flue gas sampling device: it includes a boiler exhaust pipe 1, the outside of the boiler exhaust pipe 1 is fixedly connected with a connecting pipe 2, one end of the connecting pipe 2 is fixedly connected with a first flange 3, one side of the first flange 3 is provided with a control valve 5, one side of the control valve 5 is provided with a second flange 7, one side of the second flange 7 is fixedly connected with a joint pipe 8, one end of the joint pipe 8 is inserted with a cannula 9 on the inside, one end of the cannula 9 is connected to a gas sampling bag 10 through a gas valve, and a connecting mechanism is provided between the joint pipe 8 and the cannula 9. When in use, when sampling is needed, it is only necessary to open the control valve 5, and the gas enters from the connecting pipe 2 and passes through the control valve 5 and is discharged from the joint pipe 8 into the gas sampling bag 10 for sampling, and then the control valve 5 is closed, thereby completing the effect of power station boiler flue gas sampling.

[0019] In order to facilitate flue gas sampling, the first flange 3 is connected to the air inlet side of the control valve 5 by bolts, and the air outlet side of the control valve 5 is connected to the second flange 7 by bolts.

[0020] In order to facilitate smoke sampling, the cannula 9 is connected to the gas sampling bag 10 through a gas valve.

[0021] In order to facilitate installation, the connecting mechanism includes a socket 11, a fixing groove 12, a sealing ring 13, a buckle 14, a limiting rod 15, a fixing plate 16, a through groove 17 and a limiting groove 18. A socket 11 is provided on the inside of the joint pipe 8, and a fixing groove 12 is provided at one end of the inner cavity of the socket 11. A sealing ring 13 is provided on the inside of the fixing groove 12. The outside of the joint pipe 8 is fixedly connected with a buckle 14, and the outside of the buckle 14 is fixedly connected to the limiting rod 15. The outside of the insert tube 9 is fixedly connected with a fixing plate 16. The outside of the fixing plate 16 is provided with a through groove 17. The inner cavity of the through groove 17 A limiting groove 18 is provided on the side wall. When the gas sampling bag 10 needs to be installed, the cannula 9 is inserted into the jack 11 and the sealing ring 13 is squeezed so that one end of the buckle 14 contacts the fixed disk 16. The arc surface provided on the outer side of one end of the buckle 14 plays a guiding role, causing the buckle 14 to deform and pass through the through groove 17. The rebound hook of the buckle 14 is hung on one side of the fixed disk 16 to connect and fix it. Then the cannula 9 is rotated to drive the fixed disk 16 to rotate, so that the limiting rod 15 on the buckle 14 is transferred to the limiting groove 18, thereby performing secondary limiting and anti-slipping.

[0022] Furthermore, four buckles 14 are provided, and an arc surface is provided on the outer side of one end of the buckle 14 , so that the outer wall of the insertion tube 9 fits with the inner wall of the insertion hole 11 .

[0023] Furthermore, four through slots 17 are provided.

[0024] Working principle: During use, when sampling is required, just open the control valve 5, the gas enters from the connecting pipe 2, and passes through the control valve 5, and is discharged from the connecting pipe 8 into the gas sampling bag 10 for sampling, and then close the control valve 5, thereby completing the effect of sampling the flue gas of the power station boiler. When the gas sampling bag 10 needs to be installed, insert the cannula 9 into the jack 11, and squeeze the sealing ring 13 so that one end of the buckle 14 contacts the fixed disk 16. The arc surface set on the outside of one end of the buckle 14 plays a guiding role, causing the buckle 14 to deform and pass through the through groove 17. The rebound hook of the buckle 14 is hung on one side of the fixed disk 16, thereby connecting and fixing. Then rotate the cannula 9 to drive the fixed disk 16 to rotate, so that the limit rod 15 on the buckle 14 is turned into the limit groove 18, thereby performing secondary limit and anti-slip.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these implementation rules without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power station boiler flue gas sampling device, comprising a boiler exhaust pipe (1), wherein the boiler exhaust pipe (1) is fixedly connected to a connecting pipe (2) on the outside, and characterized in that: One end of the connecting pipe (2) is fixedly connected to a first flange (3), a control valve (5) is provided on one side of the first flange (3), a second flange (7) is provided on one side of the control valve (5), a joint pipe (8) is fixedly connected to one side of the second flange (7), a cannula (9) is inserted into the inner side of one end of the joint pipe (8), one end of the cannula (9) is connected to a gas sampling bag (10) via a gas valve, and a connecting mechanism is provided between the joint pipe (8) and the cannula (9).

2. A power station boiler flue gas sampling device according to claim 1, characterized in that: The first flange (3) is connected to the air inlet side of the control valve (5) via bolts, and the air outlet side of the control valve (5) is connected to the second flange (7) via bolts.

3. The power station boiler flue gas sampling device according to claim 1, characterized in that: The cannula (9) is connected to the gas sampling bag (10) via a gas valve.

4. The power station boiler flue gas sampling device according to claim 1, characterized in that: The connecting mechanism comprises a socket (11), a fixing groove (12), a sealing ring (13), a buckle (14), a limiting rod (15), a fixing plate (16), a through groove (17) and a limiting groove (18); the socket (11) is provided on the inner side of the joint tube (8); a fixing groove (12) is provided on one end of the inner cavity of the socket (11); a sealing ring (13) is provided on the inner side of the fixing groove (12); a buckle (14) is fixedly connected to the outer side of the joint tube (8); a limiting rod (15) is fixedly connected to the outer side of the buckle (14); a fixing plate (16) is fixedly connected to the outer side of the inserting tube (9); a through groove (17) is provided on the outer side of the fixing plate (16); and a limiting groove (18) is provided on the inner cavity side wall of the through groove (17).

5. The power station boiler flue gas sampling device according to claim 4, characterized in that: Four buckles (14) are provided, and an arc surface is provided on the outer side of one end of the buckle (14), and the outer wall of the insertion tube (9) fits with the inner wall of the insertion hole (11).

6. The power station boiler flue gas sampling device according to claim 4, characterized in that: Four through slots (17) are provided.

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