Continuous sampling mechanism for boiler flue gas emission

Abstract

The utility model relates to the technical field of flue gas sampling, in particular to a boiler flue gas emission continuous sampling mechanism which comprises a bottom frame, a stand column is rotationally installed on one side of the bottom frame, a sample seat is fixed to the top of the stand column, and sampling barrels are inserted into a plurality of sets of inserting holes evenly formed in the circumferential side of the sample seat at intervals. A one-way valve is arranged in a top cover inlet of the sampling barrel; a vertical frame is fixed to the other side of the bottom frame, a quantitative extraction cylinder is fixed to the position above the vertical frame, a movable seat is arranged on the vertical frame in a lifting sliding mode, the top end of the movable seat is fixedly connected with the outer end of a plug rod fixed to the bottom side of a plug plate sliding in the quantitative extraction cylinder, and a linkage mechanism is connected between the movable seat and the sample seat; the linkage mechanism is used for driving the sample seat to rotate when the movable seat moves upwards; and an injection head is also fixed on the movable seat and is connected with the quantitative extraction barrel through a pipeline, so that the integrated control of extraction and injection of the flue gas and switching of the sampling barrel is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas sampling, in particular to a continuous sampling mechanism for boiler flue gas emission. Background Art

[0002] The boiler flue gas sampling process is an important part of environmental monitoring, and its accuracy directly affects the monitoring and management of pollution sources.

[0003] The current boiler flue gas sampler starts the sampling fan assembly during sampling to provide the necessary power for sampling, ensure that the flue gas can smoothly enter the sampling system, and operate the three-way valve and switch valve through the control system to achieve switching of different sampling pipelines or isolation of the sampling cylinder.

[0004] This solution provides a continuous sampling mechanism for boiler flue gas emissions, which realizes integrated control of flue gas extraction and switching of sampling tubes through structural settings, thereby achieving continuous sampling of flue gas. Utility Model Content

[0005] The utility model aims at at least solving the problem in the prior art that the extraction of smoke and the switching of sampling tubes in the continuous sampling of smoke require the control of different power mechanisms.

[0006] This solution provides a continuous sampling mechanism for boiler flue gas emissions, which is achieved by the following specific technical means: comprising a base frame, a column rotatably mounted on one side of the base frame, a sample holder fixed on the top of the column, a plurality of groups of insertion holes evenly spaced around the circumference of the sample holder for inserting and placing sampling tubes, and a one-way valve provided in the inlet of the top cover of the sampling tube;

[0007] A vertical frame is fixed on the other side of the base frame, and a quantitative extraction cylinder is fixed on the upper part of the vertical frame. A movable seat is provided on the vertical frame for lifting and sliding. The top of the movable seat is fixedly connected to the outer end of the plug rod fixed on the bottom side of the plug plate sliding in the quantitative extraction cylinder. The air inlet pipe at the top of the quantitative sampling cylinder is inserted into the boiler flue gas exhaust pipe. The quantitative extraction of flue gas is achieved by the up and down movement of the movable seat. A linkage mechanism is connected between the movable seat and the sample seat, and the linkage mechanism is used to drive the sample seat to rotate when the movable seat moves upward.

[0008] An injection head is also fixed on the movable seat, and the injection head is connected to the quantitative extraction cylinder through a pipeline. When the sample seat rotates, it intermittently drives different sampling cylinders to move to the bottom of the injection head. When the movable seat moves downward, the sample seat is stationary. At this time, the injection head docks with the top openings of a group of sampling cylinders directly below, and the extracted flue gas enters the sampling cylinder from the quantitative extraction cylinder through the injection head;

[0009] When the movable seat moves downward, the sample seat is in a stationary state, providing time for the injection of flue gas into the sampling tube. When the movable seat moves upward, the sample seat is in a moving state, providing power for the switching of the sampling tube, thereby realizing the integrated control of flue gas extraction and sampling tube switching.

[0010] Preferred technical solution one: the injection head includes a fixed tube fixed on the movable seat and a movable tube connected to the fixed tube. A spring 1 is also connected between the movable tube and the fixed tube. When the movable seat is on the upper side, the rebound of the spring 1 makes the bottom of the movable tube and the top of the sampling tube at the same height and in contact. As the movable seat moves downward, the fixed tube moves downward and compresses the spring, so that the bottom of the movable tube is pressed on the top of the sampling tube for docking. At this time, the plug plate moves downward to flush the flue gas in the quantitative extraction tube to open the one-way valve and inject it into the sampling tube. The injection head can maintain a docking state with the sampling tube when extracting flue gas to prevent the extracted flue gas from overflowing. Preferably, a one-way valve is also installed in the bottom of the movable tube for one-way discharge of flue gas.

[0011] Preferred technical solution two: The linkage mechanism includes an inclined groove provided on the side wall of the movable seat, a slider sliding in the inclined groove and a horizontal rail fixed on the vertical frame. A linkage seat slides horizontally on the horizontal rail, and the linkage seat and the slider are fixedly connected. Through the arrangement of the inclined groove, the slider and the horizontal rail, the linkage seat is driven to move back and forth horizontally when the movable seat moves up and down. The linkage seat and the sample seat are connected by an intermittent motion component, which is used to intermittently drive the sample seat to rotate.

[0012] Preferred technical solution three: The intermittent motion component includes a ratchet fixedly mounted on the sample seat and a pawl rotatably mounted on the linkage seat through a pin shaft. A spring 2 is connected between the pawl and the movable seat. The pawl intermittently engages with the ratchet teeth on the ratchet under the action of the spring 2. When the linkage seat moves backward on the horizontal rail, the front inclined surface of the pawl slides over the ratchet teeth of the ratchet and will not engage with the ratchet. When the linkage seat drives the pawl forward, the pawl engages with the ratchet teeth under the push of the spring 2, thereby driving the sample seat to rotate as the pawl moves forward.

[0013] Preferred technical solution four: A telescopic rod is connected between the movable seat and the base frame, and the lifting and lowering of the movable seat is controlled by the extension and retraction of the telescopic rod.

[0014] Preferred technical solution five: the high end of the inclined slot is close to the rear side of the cross rail.

[0015] Preferred technical solution six: The top surface of the sampling tube cover is a convex structure, and the top opening is opened at the highest end. The setting of the convex structure ensures that during the conversion of the sampling tube, the bottom opening of the movable tube can slide along the convex structure of the sampling tube cover to the top end and dock with the top opening, thereby avoiding rigid collision between the bottom end of the movable tube and the sampling tube.

[0016] Optimal technical solution seven: Each time the linkage seat moves back and forth, the angle at which the sample seat rotates is consistent with the corresponding fan-shaped angle between two adjacent groups of jacks, which is used to ensure that the sampling tubes can be moved one by one to just below the injection head.

[0017] The above structure enables this solution to have the following beneficial effects:

[0018] 1. The movable seat and linkage seat are used to realize the linkage of the plug plate movement, the injection head movement and the sample seat rotation, completing the integrated control of flue gas extraction, injection and sampling tube switching, and only requires one set of power source;

[0019] 2. The setting of the injection head structure ensures that the extracted smoke will not spread when it is discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0022] Figure 2 This is the cross-sectional view of this scheme;

[0023] Figure 3 This is a schematic diagram of the structure of the intermittent motion component of this scheme;

[0024] Figure 4 This is a schematic diagram of the structure of the linkage mechanism of this scheme;

[0025] Figure 5 This is a structural diagram of the linkage seat and movable seat of this scheme.

[0026] Among them, 1. base frame, 2. column, 3. sample seat, 31. jack, 4. sampling tube, 5. stand, 6. quantitative extraction tube, 7. movable seat, 8. plug plate, 81. plug rod, 9. linkage mechanism, 91. inclined groove, 92. slider, 93. cross rail, 94. linkage seat, 95. intermittent motion component, 951. ratchet, 952. pawl, 953. Spring 2, 96. telescopic rod, 10. injection head, 101. fixed tube, 102. movable tube, 103. Spring 1, 11. vertical tube, 12. limiting protrusion. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 3 The continuous sampling mechanism for boiler flue gas emissions includes a base frame 1, a column 2 is rotatably mounted on one side of the base frame 1, a sample holder 3 is fixed on the top of the column 2, a plurality of groups of insertion holes 31 are evenly spaced around the side of the sample holder 3 for inserting and placing a sampling tube 4, and a one-way valve is provided in the inlet of the top cover of the sampling tube 4;

[0029] A vertical frame 5 is fixed on the other side of the base frame 1, and a quantitative extraction cylinder 6 is fixed on the upper part of the vertical frame 5. A movable seat 7 is provided on the vertical frame 5 for lifting and sliding. A telescopic rod 96 is connected between the movable seat 7 and the base frame 1, and the lifting and lowering of the movable seat 7 is controlled by the extension and retraction of the telescopic rod 96. The top of the movable seat 7 is fixed to the outer end of the plug rod 81 fixed on the bottom side of the plug plate 8 sliding in the quantitative extraction cylinder 6. The air inlet pipe at the top of the quantitative sampling cylinder 4 is inserted into the boiler flue gas exhaust pipe, and the quantitative extraction of flue gas is achieved by the up and down movement of the movable seat 7. An injection head 10 is also fixed on the movable seat 7, and the injection head 10 is connected to the quantitative extraction cylinder 6 through a pipeline, and when the sample seat 3 rotates, different sampling cylinders 4 are intermittently driven to move to the bottom of the injection head 10. A linkage mechanism 9 is connected between the movable seat 7 and the sample seat 3, and the linkage mechanism 9 is used to drive the sample seat 3 to rotate when the movable seat 7 moves up;

[0030] When the movable seat 7 moves downward, the sample seat 3 is stationary. At this time, the injection head 10 is docked with the top of a group of sampling tubes 4 directly below, and the extracted flue gas enters the sampling tube 4 from the quantitative extraction tube 6 through the injection head 10; when the movable seat 7 moves downward, the sample seat 3 is in a stationary state, providing time for the injection of flue gas into the sampling tube 4; when the movable seat 7 moves upward, the sample seat 3 is in a rotating state, providing power for the switching of the sampling tube 4, thereby realizing the integrated control of the extraction of flue gas and the switching of the sampling tube 4.

[0031] See also Figure 1-Figure 2, boiler flue gas emission continuous sampling mechanism, the injection head 10 includes a fixed tube 101 fixed on the movable seat 7 and a movable tube 102 connected to the fixed tube 101, and a spring 103 is further connected between the bottom end of the movable tube 102 and the fixed tube 101. When the movable seat 7 is on the upper side, the rebound of the spring 103 makes the bottom end of the movable tube 102 and the top end of the sampling cylinder 4 at the same height and contact. As the movable seat 7 moves downward, the fixed tube 101 moves downward to compress the spring, so that the bottom end of the movable tube 102 presses on the top end of the sampling cylinder 4 for pressurized docking. At this time, the plug plate 8 moves downward to flush the flue gas in the quantitative extraction cylinder 6 to open the one-way valve and inject it into the sampling cylinder 4. The injection head 10 can maintain the docking state with the sampling cylinder 4 when extracting flue gas to prevent the extracted flue gas from overflowing. Preferably, a one-way valve is also installed in the bottom end of the movable tube 102 for one-way discharge of flue gas;

[0032] The top surface of the top cover of the sampling tube 4 is a convex structure, and the top opening is opened at the highest end. The setting of the convex structure ensures that during the conversion of the sampling tube 4, the bottom opening of the movable tube 102 can slide along the convex structure of the top cover of the sampling tube 4 to the top end and dock with the top opening, thereby avoiding rigid collision between the bottom end of the movable tube 102 and the sampling tube 4.

[0033] See also Figure 3-Figure 5 , boiler flue gas emission continuous sampling mechanism, the linkage mechanism 9 includes an inclined groove 91 provided on the side wall of the movable seat 7, a slider 92 sliding in the inclined groove 91 and a cross rail 93 fixed on the stand 5, a linkage seat 94 sliding horizontally on the cross rail 93, the linkage seat 94 and the slider 92 are fixedly connected, the high end of the inclined groove 91 is close to the rear side of the cross rail 93, through the arrangement of the inclined groove 91, the slider 92 and the cross rail 93, the linkage seat 94 is driven to move back and forth horizontally when the movable seat 7 moves up and down, and the linkage seat 94 is connected to the sample seat 3 through an intermittent motion component 95, which is used to intermittently drive the sample seat 3 to rotate; the intermittent motion component 95 includes a ratchet 951 fixedly sleeved on the sample seat 3 and a ratchet 951 rotatably mounted on the linkage seat 94 through a pin shaft. The pawl 952 has a spring 2 953 connected between the pawl 952 and the movable seat 7. The pawl 952 intermittently engages with the ratchet teeth on the ratchet 951 under the action of the spring 2 953. When the linkage seat 94 moves backward on the horizontal rail 93, the front inclined surface of the pawl 952 slides over the ratchet teeth of the ratchet 951 and does not engage with the ratchet 951. When the linkage seat 94 drives the pawl 952 to move forward, the pawl 952 engages with the ratchet teeth under the push of the spring 2 953, thereby driving the sample seat 3 to rotate as the pawl 952 moves forward. Each time the linkage seat 94 moves back and forth, the angle at which the sample seat 3 is driven to rotate is consistent with the corresponding fan-shaped angle between the two adjacent groups of jacks 31, which is used to ensure that the sampling cylinders 4 can be moved one by one to directly below the injection head 10.

[0034] See also Figure 1, a continuous sampling mechanism for boiler flue gas emissions, a vertical cylinder 11 is also fixed on the base frame 1, and a limiting protrusion 12 sliding through the top of the vertical cylinder 11 is connected to a spring arranged in the vertical cylinder 11. After the limiting protrusion 12 extends out of the vertical cylinder 11, the arc-shaped protrusion on the top is stuck in the teeth of the ratchet 951, which is used to maintain the stationary state of the ratchet 951 through the limiting protrusion 12 when the linkage seat 94 moves backward, and when the linkage seat 94 moves forward, the thrust of the pawl 952 is greater than the friction resistance between the limiting protrusion 12 and the teeth, so that the ratchet 951 can rotate smoothly.

[0035] Although 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 embodiments 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 continuous sampling mechanism for boiler flue gas emissions, comprising a base frame (1), a column (2) rotatably mounted on one side of the base frame (1), a sample holder (3) fixed on the top of the column (2), and characterized in that: The plurality of groups of insertion holes (31) uniformly spaced around the sample holder (3) are used to insert and place the sampling cylinder (4), and a one-way valve is provided in the top cover inlet of the sampling cylinder (4); A vertical frame (5) is fixed on the other side of the base frame (1), and a quantitative extraction cylinder (6) is fixed above the vertical frame (5). A movable seat (7) is provided on the vertical frame (5) for lifting and sliding. The top of the movable seat (7) is fixed to the outer end of a plug rod (81) fixed to the bottom side of a plug plate (8) sliding in the quantitative extraction cylinder (6). The air inlet pipe at the top of the quantitative sampling cylinder (4) is inserted into the boiler flue gas exhaust pipe. An injection head (10) is also fixed on the movable seat (7), and the injection head (10) is connected to the quantitative extraction cylinder (6) through a pipeline. A linkage mechanism (9) is connected between the movable seat (7) and the sample seat (3), and the linkage mechanism (9) is used to drive the sample seat (3) to rotate when the movable seat (7) moves upward.

2. A boiler flue gas emission continuous sampling mechanism according to claim 1, characterized in that: The injection head (10) comprises a fixed tube (101) fixed on a movable seat (7) and a movable tube (102) connected to the fixed tube (101). A spring (103) is further connected between the movable tube (102) and the fixed tube (101).

3. A boiler flue gas emission continuous sampling mechanism according to claim 2, characterized in that: A one-way valve is also installed in the bottom opening of the movable tube (102).

4. The continuous sampling mechanism for boiler flue gas emissions according to claim 1, characterized in that: The linkage mechanism (9) comprises an inclined groove (91) provided on the side wall of the movable seat (7), a slider (92) sliding in the inclined groove (91), and a transverse rail (93) fixed on the vertical frame (5); a linkage seat (94) sliding transversely on the transverse rail (93); and the linkage seat (94) and the slider (92) are fixedly connected.

5. The continuous sampling mechanism for boiler flue gas emissions according to claim 4, characterized in that: The linkage seat (94) and the sample seat (3) are connected via an intermittent motion component (95); The intermittent motion assembly (95) includes a ratchet (951) fixedly mounted on the sample seat (3) and a pawl (952) rotatably mounted on the linkage seat (94) via a pin shaft. A second spring (953) is connected between the pawl (952) and the movable seat (7). Under the action of the second spring (953), the pawl (952) intermittently engages with the ratchet teeth on the ratchet (951).

6. The continuous sampling mechanism for boiler flue gas emissions according to claim 1, characterized in that: A telescopic rod (96) is connected between the movable seat (7) and the base frame (1).

7. The continuous sampling mechanism for boiler flue gas emissions according to claim 5, characterized in that: The high end of the inclined slot (91) is close to the rear side of the cross rail (93).

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