Multi-point debugging and comparing device for flue gas emission flow rate of stationary pollution source

Abstract

The invention relates to the technical field of flue gas emission monitoring, in particular to a stationary pollution source flue gas emission flow rate multi-point debugging comparison device which comprises a driving device, a measuring guide rod, a point distribution device, a quick connection device and a sampling device. The driving device is connected with the measurement and control device; the measuring guide rod is connected with the driving device; the point distribution device is connected with the driving device; the quick connecting device is connected with the front end of the driving device; the sampling device is connected with the point distribution device; the measuring guide rod is fixedly connected with the inner wall of the flue after stretching out and drawing back to the needed position through the quick connecting device, so that the two ends of the measuring guide rod are straightened and fixed, it is guaranteed that the measuring guide rod cannot shake under the influence of self gravity and wind power through the measuring guide rod and the rack guide rail, and therefore the accuracy of the measuring result is improved; the problem that the measurement result is inaccurate due to the influence of self weight and wind power at one end, located in the flue, of a sliding rod type structure is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas emission monitoring, and particularly to a multi-point debugging and comparison device for the flue gas emission flow rate of fixed pollution sources. Background Art

[0002] A multi-point debugging and comparison device for the flue gas emission flow rate of fixed pollution sources is a device used to monitor and verify the flue gas emission flow rate of fixed pollution sources (such as factories, coal-fired power plants, refineries, etc.); currently, the flue gas flow rate is mainly monitored by three methods: the Pitot tube method, the ultrasonic method, and the heat balance method. Compared with the other two methods, the Pitot tube method is simpler and has lower costs.

[0003] When using the Pitot tube method to monitor the flue gas emission flow rate, a sampler is usually inserted into the flue through a slide bar. Due to the existence of eddy currents and turbulent flows in the flue gas flow, the flow velocity field distribution in the same monitoring section is uneven. To ensure the accuracy of the monitoring results, a solution has been proposed in the prior art. The slide bar is driven by a driving mechanism to perform point-by-point sampling, and methods such as electric push rods are used to automatically extend. Multiple Pitot tubes are arranged on the electric push rod, so that at the same time, the Pitot tubes at different positions can measure the flow rate of the flue gas in the flue. The data collected at different positions are comprehensively processed, and finally the axial average flow velocity of the flue cross-section is obtained.

[0004] Although the prior art has solved the problem that the flow rate of the flue gas at different positions in the same monitoring section is different during sampling, and the measurement data of a single position cannot represent the flue gas flow rate, there are still the following problems: When collecting data for flues of different size specifications and different positions in the flue, it is necessary to adjust the overall length of the measurement slide bar to adjust the measurement positions; however, for a slide bar type monitoring device, since the slide bar and the sampling device are affected by wind in the flue, and the slide bar type structure is only fixed by a bracket outside the flue, at this time, the end of the slide bar located inside the flue will shake and sag under the action of wind and gravity, resulting in inaccurate measurement results. Moreover, the longer the length of the measurement slide bar, the weaker the bending resistance of the measurement slide bar will be, and the greater the deformation degree under the action of wind and its own gravity will be, resulting in the shaking of the Pitot tube during the measurement process and still leading to inaccurate measurement results.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs a multi-point debugging and comparison device for the flue gas emission flow rate of fixed pollution sources. Summary of the Invention

[0006] The present invention provides a multi-point debugging and comparison device for the flue gas emission flow rate of stationary pollution sources, which solves the problem that one end of the sliding rod structure inside the flue will cause inaccurate measurement results due to its own weight and the influence of wind force. By setting up a quick-connection device, after the measuring guide rod is extended to the required position, it is fixedly connected to the inner wall of the flue through the quick-connection device, and after fixation, the bending resistance of the measuring guide rod is increased by applying opposite pulling forces at both ends of the measuring guide rod, ensuring that it will not shake under the influence of its own weight and wind force, thereby improving the accuracy of the measurement results; through the first-level rack guide rail, second-level rack guide rail and third-level rack guide rail of the I-shaped steel structure, a point distribution device is installed on one side, and the extended length is accurately adjusted through the teeth on the other side, and the fixing component can be fixed at any extended length. Compared with the electric push rod, it is more convenient to install the point distribution device and sampling device after extension and has better bending resistance, avoiding the influence of wind force and its own weight to ensure the accuracy of the measurement results.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A multi-point debugging and comparison device for the flue gas emission flow rate of stationary pollution sources includes a bracket and a measurement and control device; it also includes a driving device, a measuring guide rod, a point distribution device, a quick-connection device and a sampling device; the driving device is connected to the measurement and control device; the measuring guide rod is connected to the driving device; the point distribution device is connected to the driving device; the quick-connection device is connected to the front end of the driving device; the sampling device is connected to the point distribution device; the measurement and control device controls the driving device to perform telescopic movement, and the telescopic movement of the driving device drives the measuring guide rod to extend and retract, and after extending to the required position, the driving device is fixed through the measuring guide rod. When the quick-connection device contacts the flue, it will push the measuring guide rod and pull back the quick-connection device to form a negative pressure connection with the flue. During the telescopic process of the driving device, the point distribution device and the sampling device are driven to reach different positions.

[0009] Preferably, the driving device includes a driving motor, a driving gear, a fixed track, a third-level rack guide rail, a second-level rack guide rail and a first-level rack guide rail; the driving motor is connected to the measurement and control device; the driving gear is connected to the driving motor; the fixed track is arranged below the driving motor; the third-level rack guide rail is slidably installed in the fixed track; the second-level rack guide rail is slidably installed in the third-level rack guide rail; the first-level rack guide rail is slidably installed in the second-level rack guide rail.

[0010] In the above solution, the telescopic movement of the measuring guide rod is driven by the driving device to achieve the arrangement of different points in the horizontal direction. The driving motor drives the driving gear to rotate, thereby driving the first-level rack guide rail, the second-level rack guide rail and the third-level rack guide rail to perform sliding movements in sequence, so as to achieve the telescopic effect, and the telescopic action of the first-level rack guide rail, the second-level rack guide rail and the third-level rack guide rail can drive the point distribution device to slide, thereby changing the position of the sampling device.

[0011] Preferably, when the first rack guide rail meshes with the driving gear, the second rack guide rail and the third rack guide rail are not in contact with the driving gear; when the second rack guide rail meshes with the driving gear, the first rack guide rail and the third rack guide rail are not in contact with the driving gear; when the third rack guide rail meshes with the driving gear, the first rack guide rail and the second rack guide rail are not in contact with the driving gear.

[0012] In the above solution, it is ensured that the first rack guide rail, the second rack guide rail, and the third rack guide rail perform sliding movements in sequence, achieving the effect of hierarchical telescoping to adjust the position of the point distribution device. Since the telescopic rod's outer surface cannot be arranged with the point distribution device after the electric push rod contracts, the distance that the electric push rod is pushed out needs to be adjusted in advance, then the point distribution device and the sampling device are manually installed, and finally the electric push rod is extended into the flue, which is rather troublesome. The point distribution device can be directly installed at the non-toothed position at the other end of the third rack guide rail, the second rack guide rail, and the first rack guide rail.

[0013] Preferably, the measuring guide rod includes a first guide rod, a second guide rod, a third guide rod, and a fixing component; the second guide rod is of a sleeve structure and is connected to the second rack guide rail; the first guide rod is slidably installed in the second guide rod and is connected to the quick-connect device, and when the rear end of the first guide rod fits with the front end of the second guide rod, the teeth of the first rack guide rail coincide with the teeth of the second rack guide rail; the third guide rod is slidably installed in the second guide rod and is connected to the third rack guide rail; the fixing component is connected to the second guide rod.

[0014] In the above solution, through the sleeving method between the first guide rod, the second guide rod, and the third guide rod, when the first rack guide rail is fully extended, the diameter of the rear end of the first guide rod is greater than the diameter of the front end of the second guide rod. At this time, when the first guide rod continues to move forward with the first rack guide rail, it will drive the second guide rod to move, and the second guide rail will drive the second rack guide rail to slide, thus achieving multi-stage telescoping.

[0015] Preferably, the fixing component includes a fixing rotating groove, a fixing rotating block, a fixing pressing block, and a fixing spring; the fixing rotating groove is opened at both ends of the second guide rod; the fixing rotating block is eccentrically rotatably installed in the fixing rotating groove; the fixing pressing block is slidably installed below the fixing rotating block; the fixing spring is connected between the fixing pressing block and the fixing rotating groove.

[0016] In the above solution, through the eccentric rotational movement of the fixing rotating block, the fixing pressing block can perform a pressing action to tightly fix the first guide rod and the third guide rod, so that the first guide rod and the third guide rod cannot slide after extending to a specified distance, thereby improving the rigidity of the overall structure, ensuring that the point distribution device will not move, and further improving the stability of the measurement.

[0017] Preferably, the quick-connecting device includes a fixed disk, a suction plug, a suction spring, and a limiting component; the fixed disk is connected to the first-level rack guide, and a suction cavity is formed in the fixed disk; the suction plug is slidably installed in the suction cavity; the suction spring is connected to the suction plug; the limiting component is installed in the fixed disk.

[0018] In the above solution, after the bottom of the fixed disk contacts the inner wall of the flue, the suction plug is released from the limit by the continuous pushing of the measuring rod. At this time, under the pulling force of the suction spring, it moves in the opposite direction to the measuring rod. At this time, the movement of the suction plug causes a negative pressure to be formed in the inner cavity of the fixed disk, so as to quickly fix the measuring rod to the inner wall of the flue in a structure similar to a suction cup. And the fixed disk is a rigid structure, so as to ensure that the measuring rod will not shake.

[0019] Preferably, the limiting component includes a limiting groove, a limiting block, and a limiting spring; the limiting groove is formed on the inner wall of the fixed disk; the limiting block is slidably installed in the limiting groove; the limiting spring is connected between the limiting block and the limiting groove; a limiting card slot is formed in the middle of the suction plug.

[0020] In the above solution, the suction plug is fixed by the clamping action between the limiting block and the limiting card slot when the fixed disk is not adsorbed to the inner wall of the flue, so as to ensure that the suction spring is in a stretched state in the initial state. When the measuring rod moves to the position of the fixed disk, the measuring rod presses the limiting block to make the limiting block move radially. At this time, the limiting effect on the suction plug is released. The suction plug will slide in the opposite direction to the inner wall of the flue that fits the fixed disk under the pulling action of the suction spring, making the space of the suction cavity larger. At this time, a negative pressure is formed in the suction cavity to fix the measuring rod and the flue, avoiding the influence of wind on the measuring rod. When the measuring rod makes a pulling action in the fixed state, the limiting block will be reset. At this time, the limiting block will prevent the suction plug from being pulled back to the clamping position under the action of air pressure, so as to ensure the existence of negative pressure, further improve the stability of the measuring rod, and ensure the accuracy of the measurement result.

[0021] Preferably, a rubber pad is arranged at the bottom of the fixed disk; a driving groove is formed at one end of the fixed disk connected to the first-level rack guide, and the front end of the first-level guide rod is slidably installed in the driving groove.

[0022] In the above solution, the friction between the rubber pad and the inner wall of the flue is increased, and since the rubber pad can increase the degree of fit with the inner wall, it is avoided that the insufficient flatness of the surface of the inner wall of the flue leads to insufficient sealing and the fixing plate cannot be fixed well. Since the first rack guide rail and the fixing plate are fixedly connected, when the first rack guide rail slides, it will drive the fixing plate to slide. When the fixing plate contacts the flue, the first guide rod can slide in the driving groove, thereby driving the limiting component, so that the fixing plate can form a negative pressure state. When the fixing plate needs to be separated from the flue, when the first guide rod is pushed forward, the suction plug is pushed forward, and at this time the negative pressure state returns to the normal state and can be directly separated.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. Compared with the existing multi-point debugging and comparison device for the flue gas emission flow rate of fixed pollution sources, the present invention sets a quick-connection device. When measuring a flue with a large size specification, after the measuring guide rod automatically extends and the quick-connection device at its front end contacts the inner wall of the flue, the limiting effect of the limiting component is released by the measuring guide rod. At this time, the suction plug is released from the limit, and a sealed negative pressure space is formed between the inside of the fixing plate and the inner wall of the flue, so as to fix both ends of the measuring guide rod, improve the bending resistance of the measuring guide rod after stretching, and prevent the measuring guide rod from shaking under the influence of its own gravity and wind force, resulting in deviation of the measurement result of the sampling device for the wind speed.

[0025] 2. The present invention sets a first rack guide rail, a second rack guide rail, a third rack guide rail and a measuring guide rod. During the extension process of the first rack guide rail, the first guide rod will be driven to extend. A tensile effect in the opposite direction is formed between the first guide rod and the second guide rod to maintain the tension effect at both ends and prevent bending. Moreover, the first rack guide rail, the second rack guide rail and the third rack guide rail are of I-beam structure, which has stronger rigidity and bending resistance than the circular electric push rod, so as to resist the measurement error caused by the shaking of the measuring guide rod due to the action of gravity and wind force.

[0026] 3. The present invention sets a fixing component. After being stretched to the fixed position, the pressing action of the fixing component can ensure that the first guide rod, the second guide rod and the third guide rod cannot move relative to each other. Since the sliding of the first guide rod and the third guide rod is restricted, at this time, the rack guide rail and the measuring guide rod will not be able to perform telescopic actions, so as to ensure that the sampling device will not move during the flue gas velocity measurement, and further ensure the accuracy of the measurement. Description of the Drawings

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is the overall structure diagram of the present invention;

[0029] Figure 2 It is the schematic structural diagram of the driving device of the present invention;

[0030] Figure 3 It is Figure 2 The enlarged view of the structure at A in

[0031] Figure 4 It is the schematic assembly diagram of the measuring guide rod of the present invention;

[0032] Figure 5 It is the perspective view of the fixing component of the present invention;

[0033] Figure 6 It is the connection cross-sectional view of the first-level guide rod and the second-level guide rod of the present invention;

[0034] Figure 7 It is the schematic diagram of the non-extended state of the present invention;

[0035] Figure 8 It is the schematic diagram of the state where the present invention fits with the flue;

[0036] In the figure: 1. Bracket; 2. Measurement and control device; 3. Driving device; 31. Driving motor; 32. Driving gear; 33. Fixed track; 34. Third-level rack guide; 35. Second-level rack guide; 36. First-level rack guide; 4. Measuring guide rod; 41. First-level guide rod; 42. Second-level guide rod; 43. Third-level guide rod; 44. Fixing component; 441. Fixed rotating groove; 442. Fixed rotating block; 443. Fixed pressing block; 444. Fixed spring; 5. Spotting device; 6. Quick-connection device; 61. Fixed disk; 611. Suction cavity; 612. Rubber pad; 613. Driving groove; 62. Suction plug; 621. Limit card slot; 63. Suction spring; 64. Limit component; 641. Limit pressing groove; 642. Limit pressing block; 643. Limit spring; 7. Sampling device; 8. Flue. Specific Embodiments

[0037] To better understand the above technical solutions, the following will explain the above technical solutions in detail in combination with the accompanying drawings of the specification and specific embodiments.

[0038] Please refer to Figures 1 to 8, the present invention provides a multi-point debugging and comparison device for the flue gas emission velocity of fixed pollution sources, and the technical solution is as follows:

[0039] As a specific embodiment of the present invention, refer to Figure 1 , 2 and Figure 8 ; a multi-point debugging and comparison device for the flue gas emission velocity of fixed pollution sources, including a bracket 1 and a measurement and control device 2; further including a driving device 3, a measurement guide rod 4, a point distribution device 5, a quick connection device 6 and a sampling device 7; the driving device 3 is connected to the measurement and control device 2; the measurement guide rod 4 is connected to the driving device 3; the point distribution device 5 is connected to the driving device 3; the quick connection device 6 is connected to the front end of the driving device 3; the sampling device 7 is connected to the point distribution device 5; the measurement and control device 2 controls the driving device 3 to perform telescopic movement, and the telescopic movement of the driving device 3 drives the measurement guide rod 4 to perform telescopic movement and extend to the required position (this position is the position determined by the measurement and control device 2 through specific measurement of the flue 8 before driving the driving device 3), and then the driving device 3 is fixed through the measurement guide rod 4. When the quick connection device 6 contacts the flue 8, it will push the measurement guide rod 4 and pull back the quick connection device 6 to form a negative pressure connection with the flue 8. During the telescopic process of the driving device 3, it drives the point distribution device 5 and the sampling device 7 to reach different positions.

[0040] As a specific embodiment of the present invention, refer to Figure 2 and Figure 4 ; the driving device 3 includes a driving motor 31, a driving gear 32, a fixed track 33, a three-stage rack guide 34, a two-stage rack guide 35 and a one-stage rack guide 36; the driving motor 31 is connected to the measurement and control device 2; the driving gear 32 is connected to the driving motor 31; the fixed track 33 is arranged below the driving motor 31; the three-stage rack guide 34 is slidably installed in the fixed track 33; the two-stage rack guide 35 is slidably installed in the three-stage rack guide 34; the one-stage rack guide 36 is slidably installed in the two-stage rack guide 35. Before the driving motor 31 is started, the measurement and control device 2 measures the size of the flue 8 and obtains the lengths that the three-stage rack guide 34, the two-stage rack guide 35 and the one-stage rack guide 36 need to extend. At this time, the measurement and control device 2 drives the measurement guide rod 4 to perform telescopic movement through the driving motor 31 to achieve the arrangement of different points in the horizontal direction. The driving motor 31 drives the driving gear 32 to rotate, thereby driving the one-stage rack guide 36, the two-stage rack guide 35 and the three-stage rack guide 34 to perform sliding movements in sequence, so as to achieve the telescopic effect, and the telescopic actions of the one-stage rack guide 36, the two-stage rack guide 35 and the three-stage rack guide 34 can drive the point distribution device 5 to slide, thereby changing the position of the sampling device 7.

[0041] As a specific embodiment of the present invention, refer to Figure 1 ,Figure 2 and Figure 4 When the first-level rack guide 36 meshes with the driving gear 32, the second-level rack guide 35 and the third-level rack guide 34 are not in contact with the driving gear 32; when the second-level rack guide 35 meshes with the driving gear 32, the first-level rack guide 36 and the third-level rack guide 34 are not in contact with the driving gear 32; when the third-level rack guide 34 meshes with the driving gear 32, the first-level rack guide 36 and the second-level rack guide 35 are not in contact with the driving gear 32. Ensure that the first-level rack guide 36, the second-level rack guide 35, and the third-level rack guide 34 perform sliding movements in sequence, achieving the effect of hierarchical telescoping to adjust the position of the cloth point device 5. Since the telescopic rod's outer surface cannot be arranged with the cloth point device 5 after the electric push rod contracts, the distance that the electric push rod is pushed out needs to be adjusted in advance, then the cloth point device 5 and the sampling device 7 are manually installed, and finally the electric push rod is extended into the flue 8, which is rather troublesome. However, the cloth point device 5 can be directly installed at the non-toothed position at the other end of the third-level rack guide 34, the second-level rack guide 35, and the first-level rack guide 36, and the heights of the non-toothed sides of the third-level rack guide 34, the second-level rack guide 35, and the first-level rack guide 36 increase in sequence, so as to ensure that during the sliding process, the cloth point device 5 and the sampling device 7 on each level of the rack guide will not collide.

[0042] As a specific embodiment of the present invention, referring to Figure 2 、 Figure 4 and Figure 6 ; the measuring guide rod 4 includes a first-level guide rod 41, a second-level guide rod 42, a third-level guide rod 43, and a fixing component 44; the second-level guide rod 42 is of a sleeve structure and is connected to the second-level rack guide 35; the first-level guide rod 41 is slidably installed in the second-level guide rod 42 and is connected to the quick-connect device 6, and when the rear end of the first-level guide rod 41 fits with the front end of the second-level guide rod 42, the teeth of the first-level rack guide 36 coincide with the teeth of the second-level rack guide 35, that is, at this time, the driving gear 32 can simultaneously mesh with the teeth of the first-level rack guide 36 and the teeth of the second-level rack guide 35, ensuring that the first-level rack guide 36 and the second-level rack guide 35 perform telescopic movements simultaneously; the third-level guide rod 43 is slidably installed in the second-level guide rod 42 and is connected to the third-level rack guide 34; the fixing component 44 is connected to the second-level guide rod 42. Through the sleeved connection method between the first-level guide rod 41, the second-level guide rod 42, and the third-level guide rod 43, when the first-level rack guide 36 is fully extended, the diameter of the rear end of the first-level guide rod 41 is greater than the diameter of the front end of the second-level guide rod 42. At this time, when the first-level guide rod 41 continues to move forward with the first-level rack guide 36, it will drive the second-level guide rod 42 to move, and the second-level guide rod 42 will drive the second-level rack guide 35 to slide, thus realizing multi-level telescoping.

[0043] As a specific embodiment of the present invention, referring to Figure 4 、Figure 5 and Figure 6 ; The fixing component 44 includes a fixing rotating groove 441, a fixing rotating block 442, a fixing pressing block 443 and a fixing spring 444; the fixing rotating groove 441 is opened at both ends of the secondary guide rod 42; the fixing rotating block 442 is eccentrically rotatably installed in the fixing rotating groove 441; the fixing pressing block 443 is slidably installed below the fixing rotating block 442; the fixing spring 444 is connected between the fixing pressing block 443 and the fixing rotating groove 441. The eccentric rotation of the fixing rotating block 442 can cause the fixing pressing block 443 to perform a pressing action to tightly fix the primary guide rod 41 and the tertiary guide rod 43, so that after extending to a specified distance, the primary guide rod 41 and the tertiary guide rod 43 cannot slide, thereby improving the rigidity of the overall structure, ensuring that the cloth point device 5 will not move, and further improving the stability of the measurement.

[0044] As a specific embodiment of the present invention, referring to Figure 2 and Figure 3 ; The quick connection device 6 includes a fixing plate 61, a suction plug 62, a suction spring 63 and a limiting component 64; the fixing plate 61 is connected to the primary rack guide 36, and a suction cavity 611 is opened in the fixing plate 61; the suction plug 62 is slidably installed in the suction cavity 611; the suction spring 63 is connected to the suction plug 62; the limiting component 64 is installed in the fixing plate 61. After the bottom of the fixing plate 61 contacts the inner wall of the flue 8, the continuous pushing of the measuring guide rod 4 causes the suction plug 62 to be released from the limit. At this time, under the pulling force of the suction spring 63, it moves in the opposite direction to the measuring guide rod 4. At this time, the movement of the suction plug 62 causes a negative pressure to be formed in the inner cavity of the fixing plate 61, so as to quickly fix the measuring guide rod 4 to the inner wall of the flue 8 in a structure similar to a suction cup, and the fixing plate 61 is a rigid structure, thereby ensuring that the measuring guide rod 4 will not shake.

[0045] As a specific embodiment of the present invention, referring to Figure 3 and Figure 8; The limiting component 64 includes a limiting groove 641, a limiting block 642 and a limiting spring 643; the limiting groove 641 is formed on the inner wall of the fixed plate 61; the limiting block 642 is slidably installed in the limiting groove 641; the limiting spring 643 is connected between the limiting block 642 and the limiting groove 641; a limiting card slot 621 is formed in the middle of the suction plug 62. When the fixed plate 61 is not adsorbed to the inner wall of the flue 8, the suction plug 62 is fixed by the clamping action between the limiting block 642 and the limiting card slot 621, so as to ensure that the suction spring 63 is in a stretched state in the initial state. When the measuring guide rod 4 moves to the position of the fixed plate 61, the measuring guide rod 4 presses the limiting block 642 to make the limiting block 642 move radially. A chamfer is provided at the front end of the first-stage guide rod 41, and a slope is provided at the position of the limiting block 642 close to the axis of the fixed plate 61, which is convenient for the pressing movement between the first-stage guide rod 41 and the limiting block 642 to be realized. At this time, the limiting effect on the suction plug 62 is released, and the suction plug 62 will slide in the direction opposite to the inner wall of the flue 8 that fits with the fixed plate 61 under the pulling action of the suction spring 63, so that the space of the suction cavity 611 becomes larger. At this time, a negative pressure is formed in the suction cavity 611 to fix the measuring guide rod 4 and the flue 8, avoiding the influence of wind force on the measuring guide rod 4. When the measuring guide rod 4 makes a pulling action in the fixed state, the limiting block 642 will be reset. At this time, the limiting block 642 will prevent the suction plug 62 from being pulled back to the clamping position under the action of air pressure, so as to ensure the existence of negative pressure and further improve the stability of the measuring guide rod 4.

[0046] As a specific embodiment of the present invention, refer to Figure 3 and Figure 8; A rubber pad 612 is provided at the bottom of the fixed disk 61; A driving groove 613 is formed at one end of the fixed disk 61 connected to the first-stage rack guide 36, and the front end of the first-stage guide rod 41 is slidably installed in the driving groove 613. When the fixed disk 61 contacts the inner wall of the flue 8, the third-stage guide rod 43 is pushed forward. Since the first-stage guide rod 41, the second-stage guide rod 42, and the third-stage guide rod 43 form a structure that cannot move relative to each other under the action of the fixing assembly 44, at this time, the third-stage guide rod 43 will drive the first-stage guide rod 41, the second-stage guide rod 42, the third-stage rack guide 34, and the second-stage rack guide 35 to move forward simultaneously. The first-stage guide rod 41 presses against the limit assembly 64 to release the limit, and then the third-stage guide rod 43 is pulled backward and fixed to start speed measurement. The friction between the rubber pad 612 and the inner wall of the flue 8 is increased, and since the rubber pad 612 can increase the degree of fit with the inner wall, it is avoided that the insufficient flatness of the inner wall surface of the flue 8 leads to insufficient sealing and the fixed disk 61 cannot be fixed well. Since the first-stage rack guide 36 and the fixed disk 61 are fixedly connected, when the first-stage rack guide 36 slides, it will drive the fixed disk 61 to slide. When the fixed disk 61 contacts the flue 8, the first-stage guide rod 41 can slide in the driving groove 613, thereby driving the limit assembly 64, so that the fixed disk 61 can form a negative pressure state. When the fixed disk 61 needs to be separated from the flue 8, when the first-stage guide rod 41 is pushed forward, the suction plug 62 is pushed forward, and at this time, the negative pressure state returns to the normal state and can be directly separated.

[0047] Workflow: The measurement and control device 2 measures the size of the flue 8 and drives the driving device 3 to perform telescopic movement according to the measurement result. The first-stage rack guide 36, the second-stage rack guide 35, and the third-stage rack guide 34 extend in sequence and drive the measurement guide rod 4 to perform telescopic movement. When it reaches the specified position, the quick-connection device 6 contacts the inner wall of the flue 8, and the fixing assembly 44 is rotated to fix the first-stage guide rod 41, the second-stage guide rod 42, and the third-stage guide rod 43. At this time, the third-stage guide rod 43 is pushed forward to drive the first-stage guide rod 41 to release the limiting effect of the limit assembly 64. At this time, the suction plug 62 slides so that a sealed negative pressure chamber is formed between the fixed disk 61 and the inner wall of the flue 8 for adsorption and fixation, and the sampling device 7 follows the first-stage rack guide 36, the second-stage rack guide 35, and the third-stage rack guide 34 to reach different positions to start speed measurement.

[0048] Specifically, the measurement and control device 2 measures the size of the flue 8, and drives the drive motor 31 to rotate a specified number of turns according to the measurement result, so as to drive the first rack guide 36, the second rack guide 35, and the third rack guide 34 to extend a specified length in sequence. During the process of the first rack guide 36, the second rack guide 35, and the third rack guide 34 extending in sequence, the sampling devices 7 respectively installed on the first rack guide 36, the second rack guide 35, and the third rack guide 34 will reach different positions, so as to realize the simultaneous speed measurement of the flue gas at different positions. In order to ensure that the inner end of the measurement guide rod 4 extending into the flue 8 can be fixed to prevent the measurement guide rod 4 from shaking during the measurement process, when it is extended to the specified position, the rubber pad 612 at the front end of the fixed disk 61 is attached to the inner wall of the flue 8. Manually rotate the fixed rotating block 442. Since the eccentric rotation of the fixed rotating block 442 can cause the fixed pressing block 443 to perform a pressing action to press and fix the first guide rod 41 and the third guide rod 43, so that the first guide rod 41 and the third guide rod 43 cannot slide after extending to the specified distance, and further prevent the first guide rod 41, the second guide rod 42, and the third guide rod 43 from sliding relative to each other to form an integral structure. At this time, the third guide rod 43 can be manually pushed forward (or the drive motor 31 rotates forward to drive the second rack guide 35 or the third rack guide 34 to move forward) to drive the first guide rod 41 to slide forward. The front end of the first guide rod 41 presses against the limit pressing block 642. At this time, the limit pressing block 642 is separated from the limit card slot 621 on the air suction plug 62. Under the elastic force of the air suction spring 63, the air suction plug 62 moves towards the first guide rod 41 direction, so that the space in the air suction cavity 611 becomes larger. And the air suction cavity 611 forms a seal when the fixed disk 61 is attached to the inner wall of the flue 8. At this time, due to the air pressure change in the air suction cavity 611, the fixed disk 61 will be adsorbed on the inner wall of the flue 8. At this time, manually pull back the third guide rod 43 (or the drive motor 31 rotates reversely to drive the second rack guide 35 or the third rack guide 34 to move backward), and fix the third guide rod 43 and the third rack guide 34 to ensure that both ends of the overall measurement guide rod 4, the first rack guide 36, the second rack guide 35, and the third rack guide 34 are subjected to fixed tension, thereby improving the rigidity of the entire speed measurement and comparison device, ensuring that it can provide better bending resistance performance when affected by wind force and its own gravity, without deformation, and further ensuring the accuracy of the flue gas flow velocity measurement result.

[0049] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-point debugging and comparison device for the flue gas emission velocity of a fixed pollution source, comprising a bracket (1) and a measurement and control device (2); characterized in that: The invention also comprises a driving device (3), a measuring guide rod (4), a point distribution device (5), a quick-connect device (6) and a sampling device (7); the driving device (3) is connected to the measuring and controlling device (2); the measuring guide rod (4) is connected to the driving device (3); the point distribution device (5) is connected to the driving device (3); the quick-connect device (6) is connected to the front end of the driving device (3); and the sampling device (7) is connected to the point distribution device (5); the measuring and controlling device (2) controls the driving device (3) to perform telescopic movement; when the driving device (3) is telescopic, it drives the measuring guide rod (4) to move to a specified position; when the measuring guide rod (4) moves to the specified position, it is fixed into an integrated structure that cannot be telescopically moved; when the quick-connect device (6) contacts the flue (8), the measuring guide rod (4) is manually pushed forward and pulled back to form a negative pressure connection between the quick-connect device (6) and the flue (8); during the telescopic process, the driving device (3) drives the point distribution device (5) and the sampling device (7) to different positions.

2. According to claim 1, a multi-point debugging and comparison device for flue gas emission flow rate of a fixed pollution source is characterized in that: The driving device (3) comprises a driving motor (31), a driving gear (32), a fixed track (33), a three-stage rack guide rail (34), a two-stage rack guide rail (35) and a first-stage rack guide rail (36); the driving motor (31) is connected to the measurement and control device (2); the driving gear (32) is connected to the driving motor (31); the fixed track (33) is arranged below the driving motor (31); the three-stage rack guide rail (34) is slidably mounted in the fixed track (33); the two-stage rack guide rail (35) is slidably mounted in the three-stage rack guide rail (34); and the first-stage rack guide rail (36) is slidably mounted in the two-stage rack guide rail (35).

3. The device for multi-point debugging and comparison of the flue gas emission velocity of a fixed pollution source according to claim 2 is characterized in that: When the primary rack guide (36) is meshed with the driving gear (32) for transmission, the secondary rack guide (35) and the tertiary rack guide (34) are not in contact with the driving gear (32); when the secondary rack guide (35) is meshed with the driving gear (32) for transmission, the primary rack guide (36) and the tertiary rack guide (34) are not in contact with the driving gear (32); when the tertiary rack guide (34) is meshed with the driving gear (32) for transmission, the primary rack guide (36) and the secondary rack guide (35) are not in contact with the driving gear (32).

4. The device for multi-point debugging and comparison of the flue gas emission velocity of a fixed pollution source according to claim 2 is characterized in that: The measuring guide rod (4) comprises a primary guide rod (41), a secondary guide rod (42), a tertiary guide rod (43) and a fixing assembly (44); the secondary guide rod (42) is a sleeve-type structure and is connected to the secondary rack guide rail (35); the primary guide rod (41) is slidably mounted in the secondary guide rod (42) and is connected to the quick-connect device (6), and when the rear end of the primary guide rod (41) is in contact with the front end of the secondary guide rod (42), the teeth of the primary rack guide rail (36) overlap with the teeth of the secondary rack guide rail (35); the tertiary guide rod (43) is slidably mounted in the secondary guide rod (42) and is connected to the tertiary rack guide rail (34); the fixing assembly (44) is connected to the secondary guide rod (42).

5. The device for multi-point debugging and comparison of the flue gas emission velocity of a fixed pollution source according to claim 3 is characterized in that: The fixed assembly (44) comprises a fixed rotating groove (441), a fixed rotating block (442), a fixed pressing block (443) and a fixed spring (444); the fixed rotating groove (441) is provided at both ends of the secondary guide rod (42); the fixed rotating block (442) is eccentrically rotatably installed in the fixed rotating groove (441); the fixed pressing block (443) is slidably installed below the fixed rotating block (442); and the fixed spring (444) is connected between the fixed pressing block (443) and the fixed rotating groove (441).

6. A multi-point debugging and comparison device for flue gas emission velocity of a fixed pollution source according to claim 5, characterized in that: The quick-connect device (6) comprises a fixed disk (61), an air suction plug (62), an air suction spring (63) and a limiting assembly (64); the fixed disk (61) is connected to the primary rack guide rail (36), and an air suction cavity (611) is provided in the fixed disk (61); the air suction plug (62) is slidably installed in the air suction cavity (611); the air suction spring (63) is connected to the air suction plug (62); the limiting assembly (64) is installed in the fixed disk (61), and the limiting assembly (64) limits the air suction plug (62) when the fixed disk (61) is not in contact with the flue (8).

7. The device for multi-point debugging and comparison of the flue gas emission velocity of a fixed pollution source according to claim 6 is characterized in that: The limiting assembly (64) comprises a limiting pressure groove (641), a limiting pressure block (642) and a limiting spring (643); the limiting pressure groove (641) is provided on the inner wall of the fixed plate (61); the limiting pressure block (642) is slidably installed in the limiting pressure groove (641); the limiting spring (643) is connected between the limiting pressure block (642) and the limiting pressure groove (641); and a limiting slot (621) is provided in the middle of the air suction plug (62).

8. The device for multi-point debugging and comparison of the flue gas emission velocity of a fixed pollution source according to claim 6 is characterized in that: A rubber pad (612) is arranged at the bottom of the fixed plate (61); a driving groove (613) is provided at one end of the fixed plate (61) connected to the primary rack guide rail (36), and the front end of the primary guide rod (41) is slidably installed in the driving groove (613).

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