A sampling device for flue gas system of thermal power generating set

Abstract

The invention discloses a sampling device for a flue gas system of a thermal power generating set, and relates to the field of environmental science and engineering technology. The sampling device for a flue gas system of a thermal power generating set comprises an inspection instrument, a connecting pipe is fixedly connected to the surface of the inspection instrument, a probe frame is clamped at one end of the connecting pipe, a ventilation channel is provided inside the probe frame, an adjusting mechanism for adjusting a detection position of the probe is provided inside the probe frame, a cleaning mechanism for cleaning a filter screen of the probe is provided inside the probe frame, a blocking mechanism for preventing liquid inside the probe from entering the inspection instrument is provided inside the probe frame, and by adjusting the length of the adjusting pipe inside the flue, it is ensured that the gas collected by the sampling device is at a position where the flue gas flows evenly, thereby solving the problem of inaccurate sampling inspection results of the flue side wall, the flue gas flow at the center of the flue is relatively even, and the sampling probe is located close to the center of the flue, thereby improving the representativeness of the sampling.

Description

Technical Field

[0001] The invention relates to the field of environmental science and engineering technology, in particular to a smoke system sampling device for a thermal power generator set. Background Art

[0002] In the process of thermal power generation, the combustion of fossil fuels such as coal will produce a large amount of flue gas. These flue gases contain a variety of pollutants, such as sulfur dioxide, nitrogen oxides, particulate matter, etc., which cause serious harm to the environment and human health. In order to control and reduce the emission of these pollutants, it is necessary to monitor and analyze the flue gas, and the sampling device is one of the important tools for flue gas monitoring and analysis. The manual sampling method has problems such as low sampling efficiency, poor accuracy, and complex operation. With the continuous advancement of science and technology, automatic sampling devices have gradually replaced manual sampling devices. Compared with manual sampling devices, automatic sampling devices have the advantages of high sampling efficiency, good accuracy, and simple operation, which can effectively improve the monitoring and analysis level of the flue gas system of thermal power generating units.

[0003] There are still many inconveniences in the use of current equipment. First, different thermal power generating units have different flue sizes and shapes. When the sampling probe is extended into the flue, the existing sampling probe has a fixed length and the probe air inlet is close to the flue side wall. Due to the uneven airflow distribution in the flue, the airflow velocity near the flue side wall is slower, while the airflow velocity near the flue center is faster. This results in the fact that when sampling, the concentration of pollutants in the flue gas sample collected by the probe air inlet near the flue side wall is lower, while the concentration of pollutants in the flue gas sample collected by the probe air inlet near the flue center is higher. This uneven airflow distribution will cause errors in the sampling results, thereby affecting Monitoring and control of the flue gas system. Secondly, when thermal power generating units burn fuels such as coal, oil or natural gas, they will produce a large amount of combustion products, such as dust, sulfur dioxide, nitrogen oxides, etc. These combustion products will flow with the airflow in the flue and deposit on the side walls of the flue. When the sampling device probe extends into the flue, the sampling device probe is in direct contact with the impurities on the inner wall of the flue. The impurities accumulated on the inner wall of the flue will adhere to the surface of the filter inside the sampling device probe, and then block the filter of the sampling device. The blocked filter will hinder the circulation of flue gas, and the sampling device will not be able to accurately collect flue gas samples, which will lead to inaccurate measurement results and affect the monitoring and control of unit emissions.

[0004] Therefore, the present invention proposes a smoke system sampling device for a thermal power generator set to make up for and improve the deficiencies of the prior art. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the present invention provides a sampling device for a flue gas system of a thermal power generator set, which solves the problems in the above background technology that the sampling probe is located on the inner wall of the flue, resulting in inaccurate inspection results and the filter screen of the sampling device is easily clogged.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sampling device for a flue gas system of a thermal power generating set, comprising an inspection instrument, a connecting pipe is fixedly connected to the surface of the inspection instrument, a probe frame is clamped at one end of the connecting pipe, a ventilation channel is opened inside the probe frame, an adjusting mechanism for adjusting the probe detection position is provided inside the probe frame, a cleaning mechanism for cleaning the probe filter is provided inside the probe frame, a blocking mechanism for preventing liquid inside the probe from entering the inspection instrument is provided inside the probe frame, the adjusting mechanism includes a No. 1 push rod for adjusting the probe detection position, the cleaning mechanism includes a power shaft for driving the gas inside the probe frame, and the blocking mechanism includes a sealing panel for closing the ventilation channel inside the probe frame.

[0009] Preferably, the adjusting mechanism includes an adjusting pipe, the interior of the probe frame is fixedly connected with a fixed pipe, the adjusting pipe is slidably connected to the interior of the fixed pipe, the interior of the probe frame is fixedly connected with a fixed coupling, both ends of the fixed coupling are rotatably connected with a No. 3 push rod, the surfaces of the two No. 3 push rods are rotatably connected with a No. 4 push rod, the interior of the probe frame is slidably connected with a power push rod, the power push rod is L-shaped, one end surface of the power push rod is fixedly connected with the power coupling, the No. 4 push rods are rotatably connected to the surface of the power coupling, the No. 1 push rod is rotatably connected to one end of the No. 4 push rod, the interior of the probe frame is slidably connected with a plurality of adjusting sliding shafts, two No. 1 push rods in the same vertical plane are rotatably connected to the surface of the adjusting sliding shaft inside the probe frame, the surface of the No. 1 push rod is rotatably connected to the No. 2 push rod, the surface of the adjusting pipe is fixedly connected with a driving shaft, and one end of the two No. 2 push rods are rotatably connected to the surface of the driving shaft on the surface of the adjusting pipe.

[0010] Preferably, the length of the No. 4 putter is the sum of the length of the No. 3 putter and half the length of the No. 1 putter, and the length of the No. 2 putter is half the length of the No. 1 putter.

[0011] Preferably, there are multiple push rods No. 1, and the multiple push rods No. 1 are arranged in a linear array inside the probe frame.

[0012] Preferably, the cleaning mechanism includes a driving card block, the driving card block is slidably connected to the interior of the probe frame, the interior of the probe frame is slidably connected to two connecting push blocks, the interior of the probe frame is fixedly connected to two No. 2 springs, the No. 2 springs are fixedly connected to the connecting push blocks, the power shafts are fixedly connected to the power push rod and the surface of the driving card block, the power push rod is fixedly connected to the driving card block with a connecting slide rod, the interior of the connecting push blocks is slidably connected to sliding blocks, the interior of the connecting push blocks is fixedly connected to No. 1 springs, the interior of the probe frame is fixedly connected to two fixed blocks, and the surface of the connecting push blocks is fixedly connected to a gas piston.

[0013] Preferably, the fixed blocks are located inside the sliding path of the sliding blocks, the sliding blocks are located inside the sliding path of the power shaft, the surfaces of the sliding blocks and the fixed blocks are both set as inclined surfaces, and the inclined surfaces of the sliding blocks are in contact with the inclined surfaces of the fixed blocks.

[0014] Preferably, the thickness of the fixed stop block and the power stop shaft are both half of the thickness of the sliding stop block.

[0015] Preferably, the sealing mechanism includes an adjusting rotating rod, which is slidably connected to the interior of the probe frame, and a rotating circular plate is rotatably connected to the interior of the probe frame, and a fixed circular plate is fixedly connected to the interior of the probe frame, and an adjusting inclined block is fixedly connected to the surface of the fixed circular plate, and a bevel groove is provided on the surface of the rotating circular plate, and the bevel groove on the surface of the rotating circular plate is an equilateral hexagon, and the sealing panel is slidably connected to the surface of the rotating circular plate, and an adjusting pull shaft is fixedly connected to the surface of the sealing panel, and the adjusting pull shaft is slidably connected to the inside of the bevel groove on the surface of the rotating circular plate, and an adjusting groove is provided on the surface of the adjusting bevel block, and the adjusting pull shaft is slidably connected to the inside of the adjusting groove on the surface of the adjusting bevel block, and a fixed connecting block is fixedly connected to the surface of the rotating circular plate, and the fixed connecting block is fixedly connected to the adjusting rotating rod.

[0016] Preferably, the side length of the inclined surface groove on the surface of the rotating circular plate is equal to the length of the adjustment groove on the surface of the adjustment bevel block.

[0017] (III) Beneficial effects

[0018] The smoke system sampling device for a thermal power generator set provided by the present invention has the following beneficial effects:

[0019] 1. Through the coordinated use of the probe frame and the adjustment mechanism, the length of the adjustment pipe inside the flue is lengthened to ensure that the gas collected by the sampling device is at a position where the flue gas flows evenly, which solves the problem of inaccurate inspection results caused by the sampling probe being located on the side wall of the flue. The flue gas flow at the center of the flue is more uniform, which can more accurately reflect the flue gas conditions in the entire flue. The sampling probe is located close to the center of the flue, which can improve the representativeness of the sampling. In addition, since the flue gas flow at the center of the flue is relatively stable, the measurement error caused by unstable airflow is reduced, thereby improving the accuracy of the measurement.

[0020] 2. Through the coordinated use of the probe frame and the cleaning mechanism, the gas piston slides and pushes the gas inside the ventilation groove into the regulating pipe through the one-way valve that opens outward inside the probe frame. Since the probe frame is in a sealed state at one end close to the connecting pipe, the gas inside the probe frame is pushed by the gas piston to be discharged from the end of the regulating pipe away from the connecting pipe, thereby blowing away the impurities attached to the surface of the filter inside the regulating pipe, solving the problem of easy clogging of the filter of the sampling device. Keeping the filter on the surface of the regulating pipe clean can improve the reliability of the system and avoid the dust and impurities on the surface of the filter affecting the gas collection. Cleaning the filter before each sampling can reduce the sampling time and errors caused by excessive impurities, thereby improving the sampling efficiency.

[0021] 3. Through the coordinated use of the adjustment mechanism and the sealing mechanism, the ventilation channel of the probe frame is closed, which solves the problem that after the sampling device completes sampling, water droplets on the inner wall of the ventilation channel inside the probe frame enter the inspection instrument through the connecting pipe under the action of external force. Water droplets entering the inspection device will cause equipment failure, shutdown and other problems, thereby affecting the reliability of the equipment. The water droplets inside the probe will not enter the inspection device under the restriction of the sealing mechanism, which can improve the reliability of the equipment. In addition, water droplets inside the probe entering the inspection device will affect the accuracy of the measurement results. Limiting the water droplets inside the probe can improve the accuracy of flue gas measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0024] Figure 3 This is a location distribution diagram of the internal mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the overall structure of the regulating mechanism of the present invention;

[0026] Figure 5 For the present invention Figure 4 A partial enlarged view of middle A;

[0027] Figure 6 It is a schematic diagram of the overall structure of the cleaning mechanism of the present invention;

[0028] Figure 7 For the present invention Figure 6 A partial enlarged view of B in the middle;

[0029] Figure 8 This is a schematic diagram of the internal structure of the blocking mechanism of the present invention;

[0030] Fig. 9 It is an overall schematic diagram of the structural blocking mechanism of the present invention;

[0031] Fig.10 For the present invention Fig. 9 A partial enlarged view of C in the middle.

[0032] The numbers in the figure represent: 1. Probe frame; 2. Connecting pipe; 3. Inspection instrument; 4. Adjusting mechanism; 411. Adjusting pipeline; 412. Fixed pipeline; 413. Push rod No. 1; 414. Push rod No. 2; 415. Push rod No. 3; 416. Power coupling; 417. Fixed coupling; 418. Power push rod; 419. Push rod No. 4; 5. Cleaning mechanism; 511. Driving block; 512. Connecting slide rod; 513. Power shaft; 514. Sliding shaft; 515. No. 1 spring; 516. Connecting push block; 517. Fixed shaft; 518. No. 2 spring; 519. Gas piston; 6. Sealing mechanism; 611. Adjusting rotating rod; 612. Fixed connecting block; 613. Rotating circular plate; 614. Fixed circular plate; 615. Sealing panel; 616. Adjusting inclined block; 617. Adjusting pulling shaft. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] refer to Figures 1 to 10A sampling device for a flue gas system of a thermal power generator set according to a preferred embodiment of the present invention will be described in detail below. A sampling device for a flue gas system of a thermal power generator set includes an inspection instrument 3, a connecting pipe 2 is fixedly connected to the surface of the inspection instrument 3, a probe frame 1 is clamped at one end of the connecting pipe 2, a ventilation channel is opened inside the probe frame 1, an adjusting mechanism 4 for adjusting the probe detection position is provided inside the probe frame 1, a cleaning mechanism 5 for cleaning the probe filter is provided inside the probe frame 1, a blocking mechanism 6 for preventing the liquid inside the probe from entering the inspection instrument 3 is provided inside the probe frame 1, the adjusting mechanism 4 includes a push rod 413 for adjusting the probe detection position, the cleaning mechanism 5 includes a power shaft 513 for driving the gas inside the probe frame 1, and the blocking mechanism 6 includes a sealing panel 615 for closing the ventilation channel inside the probe frame 1.

[0035] like Figure 3 , Figure 4 and Figure 5 As shown, Figure 3 In the embodiment, the adjusting mechanism 4 includes an adjusting pipe 411, a fixed pipe 412 is fixedly connected to the inside of the probe frame 1, the adjusting pipe 411 is slidably connected to the inside of the fixed pipe 412, a fixed coupling 417 is fixedly connected to the inside of the probe frame 1, both ends of the fixed coupling 417 are rotatably connected to the third push rod 415, the surfaces of the two third push rods 415 are rotatably connected to the fourth push rod 419, the inside of the probe frame 1 is slidably connected to the power push rod 418, the power push rod 418 is L-shaped, the length of the fourth push rod 419 is the sum of the length of the third push rod 415 and half the length of the first push rod 413, the length of the second push rod 414 is half the length of the first push rod 413, and one end surface of the power push rod 418 is fixed A power coupling 416 is fixedly connected, and the No. 4 push rods 419 are all rotatably connected to the surface of the power coupling 416. The No. 1 push rod 413 is rotatably connected to one end of the No. 4 push rod 419. The power push rod 418 is manually pushed to slide inside the probe frame 1, and a thrust is given to the two No. 4 push rods 419 through the power coupling 416 fixedly connected to the surface of the power push rod 418, thereby pulling the two No. 3 push rods 415 to rotate around the fixed coupling 417. Since the length of the No. 4 push rod 419 is the sum of the length of the No. 3 push rod 415 and half the length of the No. 1 push rod 413, the No. 3 push rod 415 rotates to give a thrust to the No. 4 push rod 419, thereby pushing the No. 4 push rod 419 to rotate around the power coupling 416. Figure 4In the embodiment, the probe frame 1 is internally slidably connected with a plurality of adjusting sliding shafts, two push rods 413 in the same vertical plane are both rotatably connected to the surface of the adjusting sliding shaft inside the probe frame 1, the surface of the push rod 413 is rotatably connected to the push rod 414, the surface of the adjusting pipe 411 is fixedly connected to the driving shaft, one end of the two push rods 414 is rotatably connected to the surface of the driving shaft of the adjusting pipe 411, and the push rod 419 is rotated. Since the push rod 413 is rotatably connected to one end of the push rod 419, the push rod 419 rotates around the power shaft 416, giving the push rod 413 a thrust, thereby pushing the push rod 413 to rotate around the sliding shaft. The surface of the adjustment sliding shaft connected to the inside of the probe frame 1 rotates, and there are multiple push rods No. 1 413, which are evenly distributed in a linear array inside the probe frame 1. The push rod No. 3 415 rotates around the fixed connecting shaft 417, driving the push rods No. 1 413 that were originally in a contracted state to become a stretched state, and the push rod No. 2 414 is rotatably connected to the surface of the push rod No. 1 413, and the driving shaft on the surface of the adjustment pipe 411 is located at the connection between the two push rods No. 2 414, and then the driving shaft inside the fixed connecting shaft 417 pushes the adjustment pipe 411 to slide inside the fixed pipe 412, thereby lengthening the length of the adjustment pipe 411 inside the flue.

[0036] like Figure 6 and Figure 7 As shown, Figure 6 In the embodiment, the cleaning mechanism 5 includes a driving card block 511, which is slidably connected to the inside of the probe frame 1. The inside of the probe frame 1 is slidably connected to two connecting push blocks 516. The inside of the probe frame 1 is fixedly connected to two No. 2 springs 518, which are fixedly connected to the connecting push blocks 516. The power shaft 513 is fixedly connected to the power push rod 418 and the surface of the driving card block 511. A connecting slide rod 512 is fixedly connected between the power push rod 418 and the driving card block 511. The inside of the connecting push block 516 is slidably connected to a sliding block 514, which is located at the power push rod 418. Inside the sliding path of the shaft 513, the power push rod 418 slides and drives the card block 511 to slide, and the card block 511 slides under the drive of the power push rod 418, thereby driving the card block 511 to give a thrust to the sliding block 514, thereby pushing the connecting push block 516 to slide, thereby driving the gas piston 519 to slide away from the connecting pipe 2 through the connecting push block 516. Since a ventilation groove is provided inside the probe frame 1, and a one-way valve opened inward is provided at one end of the ventilation groove, the gas piston 519 slides under the drive of the connecting push block 516, thereby introducing external gas into the ventilation groove. Figure 7In the embodiment, the interior of the connecting push block 516 is fixedly connected to a No. 1 spring 515, the interior of the probe frame 1 is fixedly connected to two fixed stop blocks 517, the surface of the connecting push block 516 is fixedly connected to a gas piston 519, the surfaces of the sliding stop block 514 and the fixed stop block 517 are both set as inclined surfaces, the inclined surface of the sliding stop block 514 fits with the inclined surface of the fixed stop block 517, as the power push rod 418 continues to slide, the inclined surface of the sliding stop block 514 fits with the inclined surface of the fixed stop block 517, and the sliding stop block 514 is pushed by the fixed stop block 517, and the No. 1 spring 515 slides. The movable stop block 514 is pushed and compressed, and the sliding stop block 514 extends to the inside of the connecting push block 516. The sliding stop block 514 does not contact the power stop shaft 513, and the connecting push block 516 loses the restriction of the power stop shaft 513. The connecting push block 516 slides away from the No. 2 spring 518 under the push of the No. 2 spring 518, thereby driving the gas piston 519 to slide. Since the ventilation groove inside the probe frame 1 is filled with gas, the gas piston 519 slides and pushes the gas inside the ventilation groove to the inside of the regulating pipe 411 through the one-way valve that opens outward from the inside of the probe frame 1.

[0037] like Figure 8 , Fig. 9 and Fig.10 In Figure 8 In the embodiment, a water cooling groove is provided inside the probe frame 1. When high-temperature gas passes through the water cooling groove, water droplets will be generated on the inner wall of the ventilation channel inside the probe frame 1. The blocking mechanism 6 includes an adjusting rotating rod 611. The adjusting rotating rod 611 is slidably connected to the inside of the probe frame 1. A rotating circular plate 613 is rotatably connected to the inside of the probe frame 1. A fixed circular plate 614 is fixedly connected to the inside of the probe frame 1. An adjusting inclined block 616 is fixedly connected to the surface of the fixed circular plate 614. An adjusting groove is provided on the surface of the adjusting inclined block 616. The adjusting rotating rod 611 is manually pushed, and the rotating circular plate 613 is driven to rotate through the fixed connecting block 612. The rotating circular plate 613 rotates, and the inclined groove on the surface of the rotating circular plate 613 is an equilateral hexagon. Since the adjusting pull shaft 617 inside the sealing panel 615 is slidably connected to the inside of the inclined groove on the surface of the rotating circular plate 613, the rotating circular plate 613 rotates, and the sealing panel 615 slides under the drive of the adjusting pull shaft 617. Since one end of the adjusting pull shaft 617 slides inside the adjusting groove inside the adjusting inclined block 616, as shown in FIG. Fig.10In the embodiment, a bevel groove is provided on the surface of the rotating circular plate 613, and the bevel groove on the surface of the rotating circular plate 613 is an equilateral hexagon. The sealing panel 615 is slidably connected to the surface of the rotating circular plate 613. The surface of the sealing panel 615 is fixedly connected with an adjusting pull shaft 617, and the adjusting pull shaft 617 is slidably connected to the inside of the bevel groove on the surface of the rotating circular plate 613. The adjusting pull shaft 617 is slidably connected to the inside of the adjusting groove on the surface of the adjusting bevel block 616. The surface of the rotating circular plate 613 is fixedly connected with a fixed connecting block 612, and the fixed connecting block 612 is fixedly connected to the adjusting rotating rod 611. Since the adjusting groove inside the adjusting bevel block 616 is inclined, the sealing panel 615 slides in the inclined groove on the surface of the rotating circular plate 613, and tilts and slides under the restriction of the adjusting inclined block 616 on the adjusting pull shaft 617. Each sealing panel 615 sliding on the surface of the rotating circular plate 613 slides on the surface of the adjacent sealing panel 615. During the inclined sliding process of the adjacent sealing panels 615, as the degree of sliding of the sealing panels 615 on the surfaces of the adjacent sealing panels 615 decreases, equilateral hexagonal channels are formed inside the multiple sealing panels 615, and as the rotation angle of the rotating circular plate 613 increases, the side length of the equilateral hexagonal channels formed inside the multiple sealing panels 615 decreases, thereby closing the ventilation channel of the probe frame 1.

[0038] The following is the entire working process and working principle of the above embodiment: initially, multiple No. 1 push rods 413 are in a compressed and retracted state, the power shaft 513 is located on the side of the sliding block 514 away from the No. 2 spring 518, the No. 1 spring 515 and the No. 2 spring 518 are in an uncompressed state, and the internal ventilation channel of the probe frame 1 is in a sealed state under the action of the blocking mechanism 6, and the adjustment pull shaft 617 is located at the end of the adjustment groove on the surface of the adjustment bevel block 616 away from the fixed circular plate 614. During operation, when the sampling device probe is fixedly connected to the flue surface, the adjustment pipe 411 is located inside the flue and at the side wall of the flue. Since there is a slow air flow speed or vortex near the side wall, the sampling probe cannot be In order to accurately capture representative flue gas samples, when the length of the regulating pipe 411 inside the flue needs to be adjusted, the power push rod 418 is manually pushed to slide inside the probe frame 1, and a thrust is given to the two No. 4 push rods 419 through the power coupling 416 fixedly connected to the surface of the power push rod 418. Since the No. 4 push rod 419 is connected to one end of the No. 3 push rod 415 by rotation, the two No. 3 push rods 415 are pulled to rotate around the fixed coupling 417. Since the length of the No. 4 push rod 419 is the sum of the length of the No. 3 push rod 415 and half the length of the No. 1 push rod 413, the No. 3 push rod 415 rotates to give a thrust to the No. 4 push rod 419, thereby pushing the No. 4 push rod 419 to rotate around the power coupling 41 6 rotates, and at the same time, the fourth push rod 419 rotates. Since the first push rod 413 is rotatably connected to one end of the fourth push rod 419, the fourth push rod 419 rotates around the power coupling shaft 416, giving a thrust to the first push rod 413, thereby pushing the first push rod 413 to rotate around the surface of the adjustment sliding shaft slidably connected to the inside of the probe frame 1, and there are multiple first push rods 413, which are evenly distributed in the inside of the probe frame 1 in a linear array, and the third push rod 415 rotates around the fixed coupling shaft 417 to drive the first push rods 413 that were originally in a contracted state to become a stretched state, and the second push rod 414 is rotatably connected to the surface of the first push rod 413, and the surface of the adjusting pipe 411 drives the shaft located at the two second push rods. The connection between the push rod 414 and the adjusting pipe 411 is made by the driving shaft inside the fixed connecting shaft 417, and then the adjusting pipe 411 is pushed to slide inside the fixed pipe 412, thereby lengthening the length of the adjusting pipe 411 inside the flue, thereby ensuring that the gas collected by the sampling device is at a position where the flue gas flows evenly, solving the problem of inaccurate inspection results caused by the sampling probe being located on the side wall of the flue. The flue gas flow at the center of the flue is more even, which can more accurately reflect the flue gas conditions in the entire flue. The adjusting pipe 411 is located close to the center of the flue, which can improve the representativeness of the sampling. In addition, since the flue gas flow at the center of the flue is relatively stable, the measurement error caused by unstable airflow is reduced, thereby improving the accuracy of the measurement.

[0039] Furthermore, when adjusting the position of the regulating pipe 411 inside the flue, the power push rod 418 is pushed manually to slide. Since the surfaces of the power push rod 418 and the driving block 511 are fixedly connected with the power shaft 513, and the driving block 511 and the power push rod 418 are fixed by the connecting slide bar 512, the sliding of the power push rod 418 drives the driving block 511 to slide, and the driving block 511 slides under the drive of the power push rod 418, so that the sliding block 514 is given a thrust through the driving block 511, thereby pushing the connecting push block 516 to slide. The probe frame 1 is provided with a venting groove, and a one-way valve opened inward is provided at one end of the venting groove. The gas piston 519 slides under the drive of the connecting push block 516, thereby introducing the external gas into the venting groove. At the same time, the interior of the probe frame 1 is fixedly connected with a fixed stop block 517, and the inclined surface of the sliding stop block 514 fits with the inclined surface of the fixed stop block 517. The sliding stop block 514 is pushed by the fixed stop block 517, and the No. 1 spring 515 is pushed on the sliding stop block 51 4 is pushed and compressed, the sliding block 514 extends to the inside of the connecting push block 516, the sliding block 514 does not contact the power shaft 513, the connecting push block 516 loses the restriction of the power shaft 513, and the connecting push block 516 slides away from the second spring 518 under the push of the second spring 518, thereby driving the gas piston 519 to slide. Since the ventilation groove inside the probe frame 1 is filled with gas, the gas piston 519 slides and pushes the gas inside the ventilation groove to the inside of the regulating pipe 411 through the one-way valve opened outward inside the probe frame 1. Since the probe frame 1 The end close to the connecting pipe 2 is in a sealed state, and the gas inside the probe frame 1 is discharged from the end of the regulating pipe 411 away from the connecting pipe 2 under the push of the gas piston 519, thereby blowing away the impurities attached to the surface of the filter inside the regulating pipe 411, solving the problem of easy clogging of the filter of the sampling device. Keeping the filter on the surface of the regulating pipe 411 clean can improve the reliability of the system and prevent the dust and impurities on the surface of the filter from affecting the collection of gas. Cleaning the filter before each sampling can reduce the sampling time and errors caused by excessive impurities, thereby improving the sampling efficiency.

[0040] Furthermore, a water cooling groove is provided inside the probe frame 1. When high-temperature gas passes through the water cooling groove, water droplets will be generated on the inner wall of the ventilation channel inside the probe frame 1. The adjusting rotating rod 611 is manually pushed and the rotating circular plate 613 is driven to rotate through the fixed connecting block 612. The rotating circular plate 613 rotates, and the inclined groove on the surface of the rotating circular plate 613 is an equilateral hexagon. Since the adjusting pull shaft 617 inside the sealing panel 615 is slidably connected to the inside of the inclined groove on the surface of the rotating circular plate 613, the rotating circular plate 613 rotates, and the sealing panel 615 slides under the drive of the adjusting pull shaft 617. Since one end of the adjusting pull shaft 617 slides inside the adjusting groove inside the adjusting inclined block 616, and since the adjusting groove inside the adjusting inclined block 616 is inclined, the sealing panel 615 slides in the inclined groove on the surface of the rotating circular plate 613, and slides tiltly under the restriction of the adjusting pull shaft 617 by the adjusting inclined block 616, and each sealing panel 615 slides on the surface of the adjacent sealing panel 615 During the tilting and sliding process of adjacent sealing panels 615, as the degree of sliding of the sealing panels 615 on the surfaces of the adjacent sealing panels 615 decreases, an equilateral hexagonal channel is formed inside the multiple sealing panels 615, and as the rotation angle of the rotating circular plate 613 increases, the side length of the equilateral hexagonal channel formed inside the multiple sealing panels 615 decreases, thereby closing the ventilation channel of the probe frame 1, solving the problem that after the sampling device completes sampling, water droplets on the inner wall of the ventilation channel inside the probe frame 1 enter the inspection instrument 3 through the connecting pipe 2 under the action of external force. If water droplets enter the inspection device, it will cause equipment failure, shutdown and other problems, thereby affecting the reliability of the equipment. The water droplets inside the probe will not enter the inspection device under the restriction of the sealing mechanism 6, which can improve the reliability of the equipment. Moreover, if the water droplets inside the probe enter the inspection device, it will affect the accuracy of the measurement results. Limiting the water droplets inside the probe can improve the accuracy of the flue gas measurement.

[0041] 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 sampling device for a flue gas system of a thermal power generating unit, comprising an inspection instrument (3), a connecting pipe (2) being fixedly connected to the surface of the inspection instrument (3), a probe frame (1) being clamped at one end of the connecting pipe (2), a ventilation channel being provided inside the probe frame (1), characterized in that: The probe frame (1) is provided with an adjusting mechanism (4) for adjusting the detection position of the probe, the probe frame (1) is provided with a cleaning mechanism (5) for cleaning the probe filter, and the probe frame (1) is provided with a blocking mechanism (6) for preventing liquid inside the probe from entering the inspection instrument (3); The adjusting mechanism (4) comprises an adjusting pipe (411), the interior of the probe frame (1) is fixedly connected to a fixed pipe (412), the adjusting pipe (411) is slidably connected to the interior of the fixed pipe (412), the interior of the probe frame (1) is fixedly connected to a fixed shaft (417), both ends of the fixed shaft (417) are rotatably connected to a No. 3 push rod (415), the surfaces of the two No. 3 push rods (415) are rotatably connected to a No. 4 push rod (419), the interior of the probe frame (1) is slidably connected to a power push rod (418), the power push rod (418) is L-shaped, and one end surface of the power push rod (418) is fixedly connected to the The probe frame (1) is fixedly connected with a power coupling shaft (416), the fourth push rod (419) is rotatably connected to the surface of the power coupling shaft (416), one end of the fourth push rod (419) is rotatably connected to the first push rod (413), the interior of the probe frame (1) is slidably connected with a plurality of adjustment sliding shafts, two of the first push rods (413) on the same vertical plane are rotatably connected to the surface of the adjustment sliding shaft inside the probe frame (1), the surface of the first push rod (413) is rotatably connected to the second push rod (414), the surface of the adjustment pipe (411) is fixedly connected with a driving shaft, and one end of the two second push rods (414) are rotatably connected to the surface of the driving shaft of the adjustment pipe (411); The cleaning mechanism (5) comprises a driving block (511), the driving block (511) is slidably connected to the inside of the probe frame (1), the inside of the probe frame (1) is slidably connected to two connecting push blocks (516), the inside of the probe frame (1) is fixedly connected to two No. 2 springs (518), the No. 2 springs (518) and the connecting push blocks (516) are fixedly connected, the surfaces of the power push rod (418) and the driving block (511) are fixedly connected to a power shaft (513), the power push rod (418) and the driving block (511) are fixedly connected to a connecting slide rod (512), the inside of the connecting push block (516) Both are slidably connected with a sliding block (514), the interior of the connecting push block (516) is fixedly connected with a No. 1 spring (515), the interior of the probe frame (1) is fixedly connected with two fixed blocks (517), the fixed blocks (517) are located inside the sliding path of the sliding block (514), the sliding block (514) is located inside the sliding path of the power shaft (513), the surfaces of the sliding block (514) and the fixed block (517) are both set as inclined surfaces, the inclined surface of the sliding block (514) is in contact with the inclined surface of the fixed block (517), and the surface of the connecting push block (516) is fixedly connected with a gas piston (519); The sealing mechanism (6) comprises a sealing panel (615) for sealing the internal ventilation channel of the probe frame (1).

2. A sampling device for a flue gas system of a thermal power generating set according to claim 1, characterized in that: The length of the fourth putter (419) is the sum of the length of the third putter (415) and half the length of the first putter (413), and the length of the second putter (414) is half the length of the first putter (413).

3. A sampling device for a flue gas system of a thermal power generating set according to claim 1, characterized in that: There are a plurality of the number one push rods (413), and the plurality of number one push rods (413) are arranged in a linear array inside the probe frame (1).

4. A smoke system sampling device for a thermal power generator set according to claim 1, characterized in that: The thickness of the fixed stop block (517) and the power stop shaft (513) are both half the thickness of the sliding stop block (514).

5. A smoke system sampling device for a thermal power generator set according to claim 1, characterized in that: The sealing mechanism (6) comprises an adjusting rotating rod (611), the adjusting rotating rod (611) is slidably connected to the inside of the probe frame (1), the inside of the probe frame (1) is rotatably connected to a rotating circular plate (613), the inside of the probe frame (1) is fixedly connected to a fixed circular plate (614), the surface of the fixed circular plate (614) is fixedly connected to an adjusting inclined block (616), the surface of the rotating circular plate (613) is provided with an inclined groove, the inclined groove on the surface of the rotating circular plate (613) is an equilateral hexagon, and the sealing panel (615) is slidably connected to the rotating circular plate (613). Connected to the surface of the rotating circular plate (613), the surface of the covering panel (615) is fixedly connected with an adjusting pull shaft (617), and the adjusting pull shaft (617) is slidably connected to the inside of the inclined groove on the surface of the rotating circular plate (613). The surface of the adjusting inclined block (616) is provided with an adjusting groove, and the adjusting pull shaft (617) is slidably connected to the inside of the adjusting groove on the surface of the adjusting inclined block (616). The surface of the rotating circular plate (613) is fixedly connected with a fixed connecting block (612), and the fixed connecting block (612) is fixedly connected to the adjusting rotating rod (611).

6. A smoke system sampling device for a thermal power generator set according to claim 5, characterized in that: The side length of the inclined surface groove on the surface of the rotating circular plate (613) is equal to the length of the adjustment groove on the surface of the adjustment inclined block (616).

Images