CN107505173B - Automatic positioning and monitoring device for smoke and fume sampling - Google Patents
Automatic positioning and monitoring device for smoke and fume sampling Download PDFInfo
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- CN107505173B CN107505173B CN201710933043.9A CN201710933043A CN107505173B CN 107505173 B CN107505173 B CN 107505173B CN 201710933043 A CN201710933043 A CN 201710933043A CN 107505173 B CN107505173 B CN 107505173B
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- 238000005070 sampling Methods 0.000 title claims abstract description 152
- 239000000779 smoke Substances 0.000 title claims abstract description 56
- 238000012806 monitoring device Methods 0.000 title claims abstract description 30
- 239000003517 fume Substances 0.000 title description 12
- 238000012360 testing method Methods 0.000 claims abstract description 55
- 239000000428 dust Substances 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 8
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000012496 blank sample Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
Abstract
The invention discloses an automatic positioning and monitoring device for smoke and dust and smoke sampling. The automatic sampling device comprises a fixing device which is used for being fixed on the outer wall of a flue, the fixing device comprises a positioning pipe which extends into a flue sampling hole, a testing device is inserted on the positioning pipe, the testing device comprises a frame with a head matched with the positioning pipe, a multi-stage electric push rod with an automatic telescopic distance capable of being controlled is fixed on the frame, left and right linear guide rails which lie on the side are fixed on two sides in the frame beside the electric push rod, a sampling pipe is fixed between the left and right linear guide rails through a front bracket and a rear bracket, the front end of the sampling pipe is provided with a sampling head, the rear bracket is connected with two telescopic coil springs which are fixed at the rear ends of the left and right linear guide rails, the telescopic of the sampling pipe is driven by the electric push rod, and the telescopic of the electric push rod is controlled by an automatic control system. The invention has the advantages of simple and compact structure, convenient use, low manufacturing cost, high degree of automation and test steps meeting the requirements of national standards.
Description
Technical Field
The invention relates to a sampling automatic positioning monitoring device for manual comparison monitoring in manual environment monitoring and automatic environment on-line monitoring of smoke and fume pollution factors.
Background
The fixed source smoke emission is an important aspect causing atmospheric environmental pollution. In order to know the condition of the pollution environment caused by the fixed source smoke emission, the fixed source smoke emission condition needs to be monitored. There are two main monitoring methods at present: firstly, a continuous monitoring system (CEMS) for flue gas emission is not installed, and a national standard method (manual or semi-automatic) is adopted for monitoring; and secondly, the installed CEMS is continuously monitored on line and is regularly compared by using a national standard method.
The national smoke emission environment monitoring establishes strict standards and specifications, and strict requirements and detailed regulations are made on the monitoring positions, the point positions, the time, the frequency and the sampling actions of the fixed source smoke pollution emission in the standards of GB/T16157, HJ/T75, HJ/T76, HJ/T373, HJ/T397 and the like according to the specific conditions of the shape, the sectional area and the like of a flue (exhaust passage). Since the combined sampling tube is generally 1.5m-3.0m long and even longer, when the combined sampling tube mostly enters the flue for monitoring, the combined sampling tube is difficult to operate at the rear end of the sampling tube manually. In the current practical operation, the distance of the sampling tube entering the flue is controlled, the relative orientation of the sampling head, the pitot tube hole measuring surface and the air flow, the flatness of the sampling tube and the perpendicularity of the sampling tube and the flue wall are all required to be controlled manually, the intensity of the operation process is high, the stability is poor, the interference of human factors is easy, and the consistency and the reproducibility of the repeated measurement process are poor. Therefore, the average flow velocity of the flue gas is difficult to accurately measure and the coefficient of the CEMS velocity field is corrected, so that deviation exists in the measurement of the flow rate, and the corrected CEMS data of the flue gas is difficult to reflect the actual discharge condition of smoke dust and flue gas in the flue.
The strict execution of each step in the national standard monitoring method is a precondition for ensuring the data to be correct, no matter the manual or semi-automatic method or CEMS plus manual periodic comparison monitoring, the existing operation method can have serious influence on all flue gas pollution factors (SO 2, N0x, CO and the like) and the concentration calculation of smoke dust, the accuracy of the data is difficult to be ensured, and the effectiveness, fairness and scientificity of the data are not from talking.
Although there is patent CN201120163882.5 a smoke and dust sampling device of automatic positioning survey point, it includes the flange that is connected with the sampling hole that sets up on the flue outer wall, the centre embedding of flange has the polytetrafluoroethylene axle center cover that comprises two semicircle ring cylinders, smoke and dust sampling pipe slidable sets up in polytetrafluoroethylene axle center cover, the front end fixed sampling mouth of smoke and dust sampling pipe, the rear end is fixed with sampling pipe connecting piece, sampling pipe connecting piece includes the lead screw drive seat of taking the internal screw thread, lead screw one end sets up in the lead screw drive seat, the other end is connected with step motor through the fixed bearing part that sets up on fixing device, step motor passes through signal line and power cord and links to each other with the host computer of smoke and dust sampler. During detection, a signal wire and a power wire are used for giving signals to the stepping motor, the stepping motor drives the screw rod to rotate and the transmission seat to move back and forth, the screw rod transmission seat drives the sampling tube to move back and forth synchronously, and the sampling nozzle fixed at the front end of the sampling tube is also driven to move back and forth, so that the purpose of entering the front and back positions of the sampling nozzle in the flue is controlled. The structure can accurately control the distance of the sampling nozzle entering the flue through the stepping motor. However, the structure is complex, the volume is huge, and especially if the length of the sampling tube extending into the flue needs 2-3 meters, the length of the whole sampling tube needs 2.5-3.5 meters, and the total length of the sampling tube is at least 2.8-3.8 meters relative to the total length of the screw rod, the stepping motor, the screw rod transmission seat and the like. For such a long screw rod, it is necessary to have a sufficiently large diameter to ensure its rigidity, and therefore the device is very heavy, laborious and difficult to handle in installation, debugging and use, and it is difficult to use in its patent to pull the tail end of the screw rod with a steel wire on the upper side and fix it on the ground with a support frame on the lower side to ensure its stability. In actual monitoring, the sampling head at the front end of the sampling tube is often required to be replaced for a plurality of times, so that the whole smoke sampling device is required to be pulled out of the chimney, and the whole smoke sampling device is reinstalled and fixed after being inserted into the flue after being replaced by the sampling head, and the sampling head comprises a flange, a fixing device for a screw rod and the like, which is a labor-and effort-consuming work. Therefore, the use and popularization of such smoke sampling devices are relatively unacceptable to users.
The environmental monitoring data is the basis of environmental protection work, and directly influences the aspects of whether the work such as environmental protection supervision, management and treatment of the atmospheric pollution can be scientifically carried out, the realization of the target control of the atmospheric pollutant emission is influenced, and the control of indexes such as the atmospheric environment quality SO2, N0x and PM2.5 is influenced. Therefore, enterprises and environmental protection monitoring and some scientific research, detection and other units always hope to have an automatic positioning and monitoring device for smoke and dust sampling, which meets the requirements of national standards, has a simple and light structure and is convenient to use.
Disclosure of Invention
The invention aims to provide the automatic positioning and monitoring device for the smoke and the smoke sampling, which has the advantages of simple and compact structure, convenient use, low manufacturing cost, high automation degree and test steps meeting the national standard requirements.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the automatic test device is characterized by comprising a fixing device which is used for being fixed on the outer wall of a flue, wherein the fixing device comprises a positioning pipe which is provided with a positioning pipe extending into a sampling hole of the flue, a testing device is inserted on the positioning pipe, the testing device comprises a frame with a head part matched with the positioning pipe, a multi-stage electric push rod with an automatic control function is fixed on the frame through a hasp, a left straight line guide rail and a right straight line guide rail which are horizontally arranged on two sides in the frame beside the electric push rod, a sampling pipe is fixed between the left straight line guide rail and the right straight line guide rail through a front bracket and a rear bracket, the front end of the sampling pipe is provided with a sampling head, the rear bracket is connected with two shrinkage coil springs which are fixed at the rear ends of the left straight line guide rail and the right straight line guide rail, the front end of the rear bracket is connected with the front end of the electric push rod through a hoop, the expansion of the sampling pipe is driven by the electric push rod, long grooves are formed at the left side and the right side of the frame and are connected with the fixing device through connecting rods, when the testing device moves backwards along the long grooves, a disengaging space is formed between the positioning pipe and the two end surfaces of the testing device, the front end of the sampling pipe is used for replacing the sampling head, a positioning plate is fixed at the front end of the frame, a positioning plate is fixed on the front end of the frame, and an automatic positioning plate is controlled by the electric push rod through the telescopic control system.
The fixing device comprises a fixed connecting plate fixed on the flue and a movable connecting plate connected with the connecting rod, an elastic sealing backing plate is arranged between the fixed connecting plate and the movable connecting plate, the positioning pipe is fixed on the movable connecting plate, the fixed connecting plate, the movable connecting plate and the sealing backing plate are connected through bolts, and the movable connecting plate can be connected with the fixed connecting plate through bolts after rotating by 90 degrees.
The connecting rod is a downward stay bar and an upward stay bar, and is connected with the fixing device through the front long groove and the rear long groove respectively.
The movable connecting plate and the fixed connecting plate are fixed by 4 bolts, and the positions of the 4 bolts are distributed in a square shape relative to the center of the positioning pipe.
The front bracket and the rear bracket respectively comprise two guide hoops with semicircular inner holes connected through elastic connectors, annular balls are embedded in the inner hole surfaces of the guide hoops to form linear bearings capable of being separated in half, and sliding blocks matched with the left linear guide rail and the right linear guide rail are fixedly distributed on the left side and the right side of the guide hoops.
The circular locating plate is formed by splicing three sector plates, wherein the large sector plate is provided with a large through hole through which the electric push rod passes, the two small sector plates are spliced into a small through hole in the middle for the sampling pipe to pass, and the three sector plates are connected together through a tenon structure and screws.
The photoelectric encoder is arranged on the frame beside the sampling tube, the rubber wheel is arranged on the rotating shaft of the photoelectric encoder and leans against the sampling tube, the telescoping condition of the sampling tube is recorded, the information of the photoelectric encoder is fed back to the automatic control system, and the actual telescoping distance or position of the sampling tube is confirmed by the automatic control system together with the control signal of the electric push rod.
The side of the rack is fixed with a shelf for placing an automatic control operation system through a horizontal hinge, and a support leg for supporting the shelf is fixed on the rack below the shelf through a vertical hinge.
The automatic control system signal is communicated with an external tester.
And a joint sleeve is arranged between the positioning pipe and the front end of the frame and is used for testing the thin-wall flue.
The smoke and dust and smoke sampling automatic positioning and monitoring device designed according to the technical scheme has the following advantages compared with the prior art:
1. the degree of automation is high. The multi-stage electric push rod is utilized to drive the sampling tube to move back and forth, the telescopic distance is controlled by the automatic control system, the telescopic distance can be also confirmed through the multi-stage electric push rod and the photoelectric encoder, the deviation of the position of the sampling point caused by the artificial intentional or unintentional action can be prevented, and the automatic recording and processing of data are realized by means of the system.
2. The accuracy of the sampling point position is ensured. The sampling tube is positioned in the testing device by a left guide rail, a right guide rail and a front bracket and a rear bracket, wherein the rear bracket is connected through two shrinkage coil springs fixed at the rear ends of the left linear guide rail and the right linear guide rail, the rear bracket is elastically pulled backwards, the good guiding effect is realized on the sampling tube, and the sampling tube can easily and freely return; and the rear bracket is always arranged at the rear end of the testing device to position the sampling tube in the extending process or the retracting process, so that the rear bracket, the positioning plate and the front bracket keep a certain distance, and the rear bracket and the electric push rod together ensure that the head or the tail of the sampling tube cannot swing left and right or tilt up or sag when the sampling tube extends or retracts.
3. The operation is convenient, and the control is easy. The whole monitoring device is fixed on the outer wall of the flue and is inserted into the sampling hole, and the testing device is inserted into the fixing device, the testing device is positioned in the sampling hole through a positioning pipe of the fixing device, the testing device is fixed with the positioning pipe through an upper pull rod and a lower pull rod and a stay rod respectively, the testing device can be pulled out of the positioning pipe by using a long groove under the condition that the pull rod and the stay rod are fixed, a separated space (the width of the space is 30-40 cm) is formed between the positioning pipe and two end faces of the testing device, the sampling head can be replaced by using the space, and the testing device is directly inserted into the positioning pipe after replacement, so that the large action assembly and disassembly of the monitoring device during replacement of the sampling head are eliminated. When the detection of the sampling detection port at the two directions of 0 degree and 90 degrees is needed in the test, the movable connecting plate can be rotated for 90 degrees and then connected with the fixed connecting plate through bolts, so that the test of the test device at the two positions of 0 degree and 90 degrees is achieved. The quality control requirements of enabling the sampling tube to enter the first sampling point from the back of the air flow, then manually rotating 180 degrees to immediately start the test, and manually rotating 180 degrees to retract after the sampling is finished can also be met. When the whole-process blank sample needs to be tested, the requirement can be met by rotating the sampling tube by 180 degrees. When a plurality of positions are required to be tested in the same flue, fixing devices can be arranged at each position in advance, and then the test devices are replaced one by one for testing, so that the aim of quickly replacing test points is fulfilled. Vertical testing may also be performed in special cases. The use and adjustment are very convenient, and the requirements of various detection states are met.
4. Protecting the health of the testers. The front end of the monitoring device is provided with a spliced circular locating plate, which not only locates the electric push rod and the sampling tube, but also prevents the smoke and the fume of the tested flue from leaking, protects the health of the testers, and ensures the correctness of the test data (the smoke and the fume leakage can influence the test data).
5. The whole structure is compact, the weight is light, the cost is low, the manufacturing is easy, and the universality is strong. The multi-stage electric push rod is utilized to drive the sampling tube to move back and forth, so that the length of the whole monitoring device is greatly shortened, and the installation, the carrying and the transfer of the detection equipment are facilitated. The main parts of the invention are all concentrated and embraced on the frame, the transmission part adopts the multi-stage electric push rod, the occupied space is small when in use, the weight is light, the length utilization rate of the sampling tube is high (most of the length of the sampling tube can extend into the flue for detection), and the main parts are as follows: the multi-stage electric push rod, the linear guide rail and the like can be selected or customized by a professional production enterprise, and the sampling tube, the sampling head and the like can directly adopt the recommended devices in the related standards, so that the manufacturing cost is low. After the use, the multi-stage electric push rod, the sampling tube and the like can be quickly detached from the rack, and the multi-stage electric push rod, the sampling tube and the like are separately packaged and stored, so that the multi-stage electric push rod is favorable for carrying and keeping.
The whole smoke and fume sampling automatic positioning monitoring device completely meets the requirements of the national related smoke and fume sampling monitoring standard, and has realistic social and economic benefits for detecting and controlling smoke and fume and protecting the atmospheric environment.
Drawings
FIG. 1 is a front perspective view of a smoke sampling automatic positioning monitoring device;
FIG. 2 is a rear perspective view of the smoke sampling automatic positioning monitoring device;
FIG. 3 is a front side exploded view of the smoke and fume sampling automatic positioning monitoring device;
FIG. 4 is a rear side exploded view of the smoke and fume sampling automatic positioning monitoring device;
fig. 5 is a perspective view of the housing;
FIG. 6 is an exploded view of the articulating plate in the fixation device rotated 90 degrees relative to the fixation plate;
FIG. 7 is an exploded view of the bracket;
fig. 8 is a perspective view of the bracket;
FIG. 9 is a perspective view of the left and right linear guide rails with front and rear brackets mounted thereon, the sampling tube being held by the front and rear brackets, with two retractable coil springs attached to the rear bracket;
FIG. 10 is a perspective view of a locating plate;
FIG. 11 is an exploded view of the locating plate;
FIG. 12 is a perspective view of a rubber wheel mounted on a photoelectric encoder;
FIG. 13 is a perspective view of the positioning tube and the two end surfaces of the testing device, when disengaged, to form a space for facilitating replacement of the sampling head;
FIG. 14 is a perspective view of the smoke sampling automatic positioning monitoring device rotated 90 degrees;
FIG. 15 is a partial cross-sectional view of a nipple installed between a positioning tube and a testing device.
In the figure: 1. a fixing device; 2. fixing the connecting plate; 3. a movable connecting plate; 4. a sealing backing plate; 5. a positioning tube; 6. a bolt; 7. a testing device; 8. a frame; 9. a front elongated slot; 10. a rear elongated slot; 11. a brace rod; 12. a pull rod; 13. a hasp; 14. an electric push rod; 15. a left linear guide rail; 16. a right linear guide rail; 17. a front bracket; 18. a rear bracket; 19. a sampling tube; 20. a sampling head; 21. a hoop; 22. positioning hoops; 23. a guide hoop; 24. an elastic plug-in connector; 25. a ball; 26. a slide block; 27. a shrink coil spring; 28. a positioning plate; 29. a small through hole; 30. a large through hole; 31. a large sector plate; 32. a small fan-shaped plate; 33. a tongue-and-groove structure; 34. a screw; 35. a seal ring; 36. bubble level; 37. a horizontal hinge; 38. a shelf; 39. a vertical hinge; 40. supporting feet; 41. a photoelectric encoder; 42. a concave cambered surface; 43. a rubber wheel; 44. and (5) splicing the sleeve.
Detailed Description
The invention is further described below by way of examples and with reference to the accompanying drawings.
Fig. 1 to 4 are schematic structural views of a smoke sampling automatic positioning monitoring device. As seen from the figure, the device comprises a fixing device 1 used for being fixed on the outer wall of a flue, wherein the fixing device 1 comprises a fixed connecting plate 2 and a movable connecting plate 3 which are fixed on the flue, an elastic sealing backing plate 4 is arranged between the fixed connecting plate 2 and the movable connecting plate 3, and a positioning pipe 5 is fixed on the movable connecting plate 3. The fixed connecting plate 2, the movable connecting plate 3 and the sealing backing plate 4 are connected by 4 bolts 6. The positioning tube 5 is inserted with a testing device 7, the testing device 7 comprises a frame 8 with the head part matched with the positioning tube 5, as shown in fig. 5, a front long groove 9 and a rear long groove 10 are respectively arranged on the left side and the right side of the frame 8, and the testing device is connected with the movable connecting plate 3 through the front long groove 9 and the rear long groove 10 by using a downward stay bar 11 and an upward pull bar 12. In order to meet the requirement of the detection of the rotation of the testing device 7 by 90 degrees, the movable connecting plate 3 can be connected with the fixed connecting plate 2 by bolts 6 after rotating by 90 degrees as shown in fig. 6, and therefore, 4 bolts 6 for fixing the movable connecting plate 3 and the fixed connecting plate 2 are distributed in a square shape relative to the center of the positioning tube 5. A multistage electric push rod 14 is fixed on the frame 8 through 2 buckles 13, a left linear guide rail 15 and a right linear guide rail 16 which are horizontally arranged on the side are fixed on two sides in the frame 8 beside the electric push rod 14, a sampling tube 19 is fixed between the left linear guide rail 15 and the right linear guide rail 16 through a front bracket 17 and a rear bracket 18, and the front bracket 17 and the rear bracket 18 slide back and forth between the left linear guide rail 15 and the right linear guide rail 16. The front end of the sampling tube 19 is fitted with a sampling head 20 (a combination of a sampling nozzle and a filter cartridge or filter membrane, etc.). The back of the step at the front end of the sampling tube 19 is connected with the front end of the electric push rod 14 by a hoop 21, and the expansion and contraction of the sampling tube 19 is driven by the electric push rod 14. In the test, the sampling head 20 is required to be operated back to the air flow before entering the first sampling point test, after the sampling and during blank test, so that the sampling tube 19 can be conveniently rotated, and the anchor ear 21 and the sampling tube 19 adopt incomplete locking and damped locking. In order to prevent the sampling tube 19 from moving axially in the anchor ear 21, two half-involution positioning hoops 22 are fixed on the sampling tube 19 behind the anchor ear 21, and together with the original protruding steps of the sampling tube 19, the anchor ear 21 is limited axially on the sampling tube 19. The front bracket 17 and the rear bracket 18 are formed by connecting two guide hoops 23 with semicircular inner holes through elastic connectors 24. Annular balls 25 are embedded in the inner hole surface of the guide hoop 23 to form a linear bearing capable of being divided into halves, and sliding blocks 26 matched with the left linear guide rail 15 and the right linear guide rail 16 are fixedly distributed on the left side and the right side of the guide hoop 23, as shown in fig. 7 and 8. The sampling tube 19 is held in the front bracket 17 and the rear bracket 18. Wherein the left and right sides of the rear bracket 18 are respectively connected with two contraction coil springs 27 fixed at the rear ends of the left and right linear guide rails 15 and 16, and the rear bracket 18 is elastically pulled back by the tension of the contraction coil springs 27 as shown in fig. 9. The front end of the frame 8 is fixed with a spliced circular positioning plate 28, the positioning plate 28 is provided with a small through hole 29 for the sampling tube 19 to pass through and a large through hole 30 for the electric push rod 14 to pass through, the positioning plate 28 is formed by splicing three sector plates, the large sector plate 31 is provided with the large through hole 30, two small sector plates 32 are spliced into a middle small through hole 29, and the three sector plates are connected together through a tenon structure 33 and a screw 34. In order to prevent smoke dust and fume from leaking out of the gaps between the large through hole 30 and the electric push rod 14 and between the small through hole 29 and the sampling tube 19, grooves are formed in the walls of the large through hole 30 and the small through hole 29, and sealing rings 35 are inlaid in the grooves, as shown in fig. 10 and 11.
A bubble type level 36 is arranged on the side surface of the frame 8 to ensure that the automatic positioning and monitoring device for smoke and fume sampling is in a horizontal state during installation and test. The side of the frame 8 is fixed with a shelf 38 for placing an automatic control operation system through a horizontal hinge 37, 2 supporting feet 40 for supporting the shelf are fixed on the frame 8 below the shelf 38 through a vertical hinge 39, and the shelf 38 and the supporting feet 40 can be folded during storage, so that the volume of the appearance is reduced.
The expansion and contraction of the electric push rod 14 is controlled by an automatic control system. The photoelectric encoder 41 is installed on the frame 8 beside the sampling tube 19, the rubber wheel 43 with the outer circle being the concave cambered surface 42 is installed on the rotating shaft of the photoelectric encoder 41, as shown in fig. 12, the concave cambered surface 42 of the rubber wheel 43 elastically abuts against the outer surface of the sampling tube 19, when the sampling tube 19 stretches, the rotating shafts of the rubber wheel 43 and the photoelectric encoder 41 are driven to rotate, so that the stretching condition of the sampling tube 19 is recorded, the information of the photoelectric encoder is fed back to an automatic control system, and the actual stretching distance or position of the sampling tube 19 is confirmed by the automatic control system together with a control signal of the electric push rod 14, wherein the signal of the automatic control system is communicated with an external tester.
When the sampling head 20 at the front end of the sampling tube 19 needs to be replaced in the test, under the condition that the pull rod 12 and the stay rod 11 are fixed with the frame 8, the front long groove 9 and the rear long groove 10 are utilized to enable the testing device 7 to be pulled out of the positioning tube 5, a disengaging space is formed between the positioning tube 5 and two end faces of the testing device 7, the width L of the space is 30-40 cm, as shown in fig. 13, the sampling head 20 can be replaced by utilizing the space, and the testing device 7 is directly inserted into the positioning tube 5 after replacement, so that the large action of the monitoring device during replacement of the sampling head 20 is eliminated.
In the test, the sampling head 20 needs to detect at two orientations of 0 degree and 90 degrees, and the movable connecting plate 3 can be rotated for 90 degrees and then connected with the fixed connecting plate 2 through the bolts 6, so that the testing device 7 also rotates for 90 degrees together with the movable connecting plate 3, and the test of the testing device at two positions of 0 degree and 90 degrees is achieved as shown in fig. 14.
For tests in thin-walled flues, such as steel chimneys, it may happen that the sampling head 20 at the front end of the sampling tube 19 is too forward (beyond the nearest sampling point) when the sampling tube 19 is in the rearmost position, and for this purpose, a nipple 44 is installed between the positioning tube 5 and the front end of the frame 8, so that the whole test device 7 is moved backwards a distance relative to the fixing device 1, and the sampling head 20 at the front end is also moved backwards synchronously as shown in fig. 15, so as to meet the requirements of this special test occasion.
Claims (10)
1. The automatic positioning and monitoring device for smoke and dust and flue gas sampling is characterized by comprising a fixing device which is used for being fixed on the outer wall of a flue, wherein the fixing device comprises a positioning tube which is provided with a positioning tube extending into a flue sampling hole, a testing device is inserted on the positioning tube, the testing device comprises a rack with a head part matched with the positioning tube, a multi-stage electric push rod with an automatically controlled telescopic distance is fixed on the rack through a hasp, a left straight line guide rail and a right straight line guide rail which are laterally positioned are fixed on two sides in the rack beside the electric push rod, a sampling tube is fixed between the left straight line guide rail and the right straight line guide rail through a front bracket and a rear bracket, the front end of the sampling tube is provided with a sampling head, the rear bracket is connected with two telescopic coil springs which are fixed at the rear ends of the left straight line guide rail and the right straight line guide rail, the front end of the sampling tube is connected with the front end of the electric push rod through a hoop, the telescopic of the sampling tube is driven by the electric push rod, long grooves are arranged on the left side and the right side of the rack, when the testing device moves backwards along the long grooves, a space formed between the positioning tube and the two end faces of the testing device, the sampling tube is used for replacing the sampling head, the front end of the sampling tube is connected with the electric push rod through the positioning rod through the automatic control system, and the positioning device is connected with the automatic control system.
2. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1, wherein the fixing device comprises a fixed connection plate fixed on the flue and a movable connection plate connected with the connection rod, an elastic sealing backing plate is arranged between the fixed connection plate and the movable connection plate, the positioning tube is fixed on the movable connection plate, the fixed connection plate, the movable connection plate and the sealing backing plate are connected by bolts, and the movable connection plate can be connected with the fixed connection plate by bolts after rotating by 90 degrees.
3. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1 or 2, wherein the connecting rod is a downward stay rod and an upward stay rod, and the connecting rod is connected with the fixing device through a front long groove and a rear long groove respectively.
4. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 2, wherein the movable connecting plate and the fixed connecting plate are fixed by 4 bolts, and the positions of the 4 bolts are distributed in a square shape relative to the center of the positioning pipe.
5. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1, wherein the front bracket and the rear bracket respectively comprise two guide hoops with semicircular inner holes connected by elastic connectors, annular balls are embedded in the inner hole surfaces of the guide hoops to form linear bearings capable of being separated in half, and sliding blocks matched with the left linear guide rail and the right linear guide rail are fixedly distributed on the left side and the right side of the guide hoops.
6. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1, wherein the circular positioning plate is formed by splicing three sector plates, wherein the large sector plate is provided with a large through hole through which an electric push rod passes, the two small sector plates are spliced into a small through hole in the middle through which a sampling tube passes, and the three sector plates are connected together through a tenon structure and a screw.
7. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1, wherein a photoelectric encoder is arranged on a frame beside the sampling tube, a rubber wheel is arranged on a rotating shaft of the photoelectric encoder, the rubber wheel is leaned against the sampling tube, the telescoping condition of the sampling tube is recorded, the information of the photoelectric encoder is fed back to an automatic control system, and the actual telescoping distance or position of the sampling tube is confirmed by the automatic control system together with a control signal of an electric push rod.
8. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1, wherein a shelf for placing an automatic control operation system is fixed on the side surface of the rack through a horizontal hinge, and supporting feet for supporting the shelf are fixed on the rack below the shelf through a vertical hinge.
9. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1, wherein the signal of the automatic control system is communicated with an external tester.
10. The automatic positioning and monitoring device for smoke and dust and smoke sampling according to claim 1, wherein a joint is arranged between the positioning pipe and the front end of the frame, and is used for testing a thin-wall flue.
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| CN109238791B (en) * | 2018-11-06 | 2021-06-01 | 长兴新亚环保机械科技有限公司 | Waste incineration flue gas detection device |
| CN112577789B (en) * | 2020-12-07 | 2021-10-01 | 南京波瑞自动化科技有限公司 | Dilution and jet flow two-in-one constant-speed sampling device |
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