High-precision dust-gas simultaneous sampling device

Abstract

The utility model discloses a high-precision dust-gas simultaneous sampling device, which relates to the field of dust-gas simultaneous sampling and comprises a sampling host and a sampling pipe, and one end of the sampling pipe is communicated with the sampling host; a partition plate is fixedly mounted in the sampling host, a filter paper conveying mechanism, a pressing sealing mechanism and a photoelectric detection mechanism are mounted on the partition plate, a filter paper belt is connected to the filter paper conveying mechanism, and the filter paper conveying mechanism drives the filter paper belt to pass through the pressing sealing mechanism and the photoelectric detection mechanism; a gas conveying pipe is arranged at the upper end of the pressing sealing mechanism and is connected with the sampling pipe; smoke of the sampling pipe is input into the pressing and sealing mechanism through the gas conveying pipe, the pressing and sealing mechanism presses a filter paper belt on the filter paper conveying mechanism when working, the smoke can be fully filtered after passing through the filter paper belt, and particulate matter on the smoke can stay on the filter paper belt; and then the particles are input into the photoelectric detection mechanism and photoelectric detection is carried out by using beta rays, so that the concentration reading of the particles is realized, and a high-precision concentration value is obtained.

Description

Technical Field

[0001] The utility model relates to the field of simultaneous collection of soot and gas, in particular to a high-precision sampling device for simultaneous collection of dust and gas. Background Technique

[0002] A soot and smoke gas tester uses the equal velocity sampling gravimetric method with a Pitot tube to capture particulate matter in a pipeline, and uses the fixed potential electrolysis method to qualitatively and quantitatively determine harmful gases. The main functions of the soot and smoke gas tester are soot sampling and flue gas analysis.

[0003] Taking the existing YLB-3330D large-flow low-concentration soot and smoke gas tester as an example, during oil fume sampling, a YLB-L08 oil fume sampling tube (or sampling gun) is equipped, and an oil fume filter cartridge needs to be installed at the head of the sampling tube; during soot sampling, a YLB-L01 multi-functional sampling tube is equipped, and a sampling hook and a No. 3 filter cartridge need to be installed at the head of the sampling tube; during low-concentration soot sampling, a YLB-L04 sampling tube is equipped, and a low-concentration sampling head and heating need to be installed at the head of the sampling tube; and during flue gas analysis, a YLB-L11 flue gas preprocessor or a YLB-L14 flue gas sampling tube is mainly used; thus, in different scenarios, different sampling tubes need to be replaced for use. The function of a single sampling tube is relatively single, and the large number of them is inconvenient to carry.

[0004] Therefore, the utility model patent with the application number 2024200671310 discloses a device for simultaneous collection of soot and smoke gas. Through the threaded cooperation between the first flue gas sampling tube and the soot sampling filter cover, it is convenient to install a filter element in the soot sampling filter cover or replace the filter element, so as to filter the soot in the gas entering the first flue gas sampling tube by using the filter element. Through the detachable connection between the filter paper cylinder and the locking flange, it is convenient to replace among the soot sampling head, the low-concentration sampling head, and the oil fume sampling head, reducing the size of the accessories to be replaced and improving the versatility and portability of the device.

[0005] However, the soot detection work needs to be completed by a soot detector with a sampling gun. The above scheme only records the structure of the sampling tube and does not record the soot detector that matches it. In the above technical scheme, a soot sampling head, a low-concentration sampling head, and an oil fume sampling head are placed at the end of the paper cylinder for sampling and detection. However, this detection method cannot perform high-precision detection on its particulate matter, and there are certain measurement errors. Therefore, it is necessary to design a high-precision sampling device for simultaneous collection of dust and gas that matches the above sampling tube scheme. Summary of the Utility Model

[0006] The utility model overcomes the above deficiencies and provides a technical solution that can solve the above problems.

[0007] High-precision dust and gas sampling device, including a sampling host and a sampling tube, one end of the sampling tube is connected to the sampling host; a partition is fixedly installed in the sampling host, and a filter paper conveying mechanism, a pressing and sealing mechanism, and a photoelectric detection mechanism are installed on the partition. A filter paper belt is connected to the filter paper conveying mechanism, and the filter paper conveying mechanism drives the filter paper belt to pass through the pressing and sealing mechanism and the photoelectric detection mechanism one by one; an air delivery pipe is arranged at the upper end of the pressing and sealing mechanism, and the air delivery pipe is connected to the sampling tube.

[0008] Furthermore: A gun rod docking head is fixedly installed on the sampling host, and a gun rod docking seat is fixedly installed at one end of the sampling tube close to the sampling host. A detachable connection is formed between the gun rod docking seat and the gun rod docking head.

[0009] Furthermore: A socket head cap screw is fixedly installed at one end of the gun rod docking seat close to the gun rod docking head. A plurality of screw slots are formed at the end of the gun rod docking head, and the plurality of screw slots are arranged in a circular array with each other. The socket head cap screw is inserted into one of the screw slots with a clearance fit.

[0010] Furthermore: A hand-tightening screw is installed on the side of the gun rod docking head in a spiral fit, and the inner end of the hand-tightening screw presses on the gun rod docking seat to complete the locking.

[0011] Furthermore: The filter paper conveying mechanism includes two driving mechanisms and two driven mechanisms. A filter paper coil is sleeved on one of the driving mechanisms, and the outer end of the filter paper coil pulls out a filter paper belt, which bypasses the two driven mechanisms and is fixedly connected to the other driving mechanism.

[0012] Furthermore: The driving mechanism includes a stepping motor and a paper tape wheel. The stepping motor is fixedly installed at the rear side of the partition, the rotor of the stepping motor drives the paper tape wheel to rotate. A disc baffle is fixedly installed at one end of the paper tape wheel close to the stepping motor, a movable baffle is installed at the other end of the paper tape wheel, and a plum blossom hand wheel is installed at the end of the paper tape wheel far from the stepping motor in a spiral fit. The plum blossom hand wheel drives the movable baffle to move back and forth on the paper tape wheel.

[0013] Furthermore: The driven mechanism includes a bearing seat, a driven shaft, and a driven wheel. The bearing seat is fixedly installed on the partition, and the pressing and sealing mechanism and the photoelectric detection mechanism are located between the bearing seats of the two driven mechanisms.

[0014] Furthermore: Positioning baffles are fixedly installed at both ends of the driven wheel.

[0015] Furthermore: Two encoders are fixedly installed at the rear side of the partition, and the encoders are arranged at the rear ends of the driven mechanisms one by one.

[0016] Further: The pressing and sealing mechanism includes an electric push rod, a heat insulation plate, a fixed seat, a nozzle tube and a heating seat. The fixed seat and the heating seat are both fixedly installed on the partition board. The nozzle tube is installed in the fixed seat in a lifting and sliding manner. The heat insulation plate is fixedly installed at the rear side of the partition board. The electric push rod is fixedly installed on the heat insulation plate. The electric push rod drives the nozzle tube to move up and down in the fixed seat. The heating seat is located below the fixed seat. The filter paper belt is arranged through the gap between the heating seat and the fixed seat. The upper end of the nozzle tube is communicated with the air delivery pipe.

[0017] Further: An air passing groove is formed in the heating seat. Both ends of the air passing groove extend out of the heating seat. A wrapped filter screen sheet is fixedly installed at the upper end of the air passing groove. The nozzle tube is located above the wrapped filter screen sheet. A pagoda joint is fixedly installed at the other end of the air passing groove.

[0018] Further: A fixing ring is fixedly installed at the lower end of the nozzle tube. A first O-ring is fixedly installed on the lower side of the fixing ring. The nozzle tube is pressed on the air passing groove of the heating seat through the first O-ring.

[0019] Further: A spring is installed in a butt-joint manner between the nozzle tube and the fixed seat. The spring is sleeved on the outer side of the nozzle tube.

[0020] Further: A positioning cylinder is fixedly installed in the fixed seat. The nozzle tube moves up and down in the positioning cylinder. One or more second O-rings are installed in a butt-joint manner between the nozzle tube and the positioning cylinder.

[0021] Further: The photoelectric detection mechanism includes a beta-ray detector, a support seat and a beta source. The support seat is fixedly installed on the partition board. A cutting groove is formed on the front side of the support seat. The filter paper belt is arranged through the cutting groove. The beta-ray detector is fixedly installed on the support seat. The bottom end of the beta-ray detector extends into the cutting groove. A positioning support is fixedly installed on the bottom side in the cutting groove. The beta source is fixedly installed in the positioning support.

[0022] Further: A main board module and a 4G wireless communication module are fixedly installed in the sampling host. The main board module controls the filter paper conveying mechanism, the pressing and sealing mechanism and the photoelectric detection mechanism to work through the 4G wireless communication module.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows: The flue gas of the sampling tube is input into the pressing and sealing mechanism through the air delivery pipe. When the pressing and sealing mechanism works, it holds the filter paper belt on the filter paper conveying mechanism. After the flue gas passes through the filter paper belt, it will be fully filtered, and the particulate matter on the flue gas will stay on the filter paper belt. Then, the filter paper conveying mechanism is used to drive the position of the filter paper belt where the particulate matter stays into the photoelectric detection mechanism, and photoelectric detection is carried out by using beta rays to realize the reading of the concentration of the particulate matter, and a high-precision concentration value can be obtained.

[0024] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of the present utility model;

[0027] Figure 2 is a schematic structural diagram when the sampling main unit is opened;

[0028] Figure 3 is an exploded structural diagram of another perspective of the sampling main unit;

[0029] Figure 4 is a schematic structural diagram of the sampling tube;

[0030] Figure 5 is a schematic installation structure diagram of the filter paper tape;

[0031] Figure 6 is a schematic structural diagram of the driving mechanism;

[0032] Figure 7 is a schematic structural diagram of the driven mechanism;

[0033] Figure 8 is a schematic structural diagram of the pressing and sealing mechanism;

[0034] Figure 9 is a schematic structural diagram of the photoelectric detection mechanism;

[0035] Figure 10 is a reference diagram of the gas path principle of the present utility model.

[0036] As shown in the figure: 1. Sampling main unit; 2. Sampling tube; 3. Partition board;

[0037] 4. Filter paper conveying mechanism; 4.1. Driving mechanism; 4.11. Stepper motor; 4.12. Paper tape wheel; 4.13. Disc baffle; 4.14. Movable baffle; 4.15. Plum blossom handwheel; 4.2. Driven mechanism; 4.21. Bearing seat; 4.22. Driven shaft; 4.23. Driven wheel; 4.24. Positioning baffle; 4.25. Encoder;

[0038] 5. Pressing seal mechanism; 5.1. Electric push rod; 5.2. Heat insulation board; 5.3. Fixed seat; 5.4. Pressing nozzle tube; 5.5. Heating seat; 5.6. Air groove; 5.7. Edge filter screen; 5.8. Pagoda joint; 5.9. Fixed ring; 5.10. First O-ring; 5.11. Spring; 5.12. Positioning cylinder; 5.13. Second O-ring;

[0039] 6. Photoelectric detection mechanism; 6.1. β-ray detector; 6.2. Support seat; 6.3. Beta source; 6.4. Grooving; 6.5. Positioning support;

[0040] 7. Filter paper belt; 8. Gas pipe; 9. Gun barrel joint; 10. Gun barrel docking seat; 11. Headless screw; 12. Screw slot; 13. Thumb screw; 14. Filter paper roll; 15. Mainboard module; 16. 4G wireless communication module. DETAILED DESCRIPTION

[0041] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0042] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0043] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0046] As Figure 1-10 shown, the high-precision dust and gas co-sampling device of the present utility model includes a sampling main unit 1 and a sampling tube 2. One end of the sampling tube 2 is inserted into the sampling main unit 1; a partition 3 is fixedly installed inside the sampling main unit 1, and a filter paper conveying mechanism 4, a pressing and sealing mechanism 5, and a photoelectric detection mechanism 6 are installed on the partition 3. A filter paper belt 7 is connected to the filter paper conveying mechanism 4, and the filter paper conveying mechanism 4 drives the filter paper belt 7 to pass successively through the pressing and sealing mechanism 5 and the photoelectric detection mechanism 6; an air delivery pipe 8 is arranged at the upper end of the pressing and sealing mechanism 5, and the air delivery pipe 8 is connected to the sampling tube 2;

[0047] Its principle is as follows: The flue gas of the sampling tube 2 is input into the pressing and sealing mechanism 5 through the air delivery pipe 8. When the pressing and sealing mechanism 5 works, it holds the filter paper belt 7 on the filter paper conveying mechanism 4. After the flue gas passes through the filter paper belt 7, it will be fully filtered, and the particulate matter on the flue gas will stay on the filter paper belt 7. Then, the filter paper conveying mechanism 4 is used to drive the filter paper belt 7 to the position where the particulate matter stays and input it into the photoelectric detection mechanism 6, and photoelectric detection is carried out using beta rays to realize the reading of the concentration of the particulate matter, and a high-precision concentration value can be obtained.

[0048] Furthermore: A gun barrel docking head 9 is fixedly installed on the sampling main unit 1, and a gun barrel docking seat 10 is fixedly installed at one end of the sampling tube 2 close to the sampling main unit 1. A detachable connection is formed between the gun barrel docking seat 10 and the gun barrel docking head 9; the docking and assembly between the sampling main unit 1 and the sampling tube 2 can be realized, which is convenient for use and storage.

[0049] Furthermore: A countersunk head screw 11 is fixedly installed at one end of the gun barrel docking seat 10 close to the gun barrel docking head 9. A plurality of screw slots 12 are formed at the end of the gun barrel docking head 9, and the plurality of screw slots 12 are circularly arranged with each other. The countersunk head screw 11 is inserted into one of the screw slots 12 with a clearance fit; the precise positioning after the docking of the gun barrel docking seat 10 and the gun barrel docking head 9 can be realized by inserting the countersunk head screw 11 into one of the screw slots 12, so that the gun barrel docking seat 10 and the gun barrel docking head 9 will not rotate relative to each other after docking.

[0050] Furthermore, a hand-tightening screw 13 is spirally and cooperatively installed on the side of the gun barrel docking head 9, and the inner end of the hand-tightening screw 13 presses against the gun barrel docking seat 10 to complete the locking. After the gun barrel docking seat 10 and the gun barrel docking head 9 are docked, the hand-tightening screw 13 can be used for locking, so that the docking end of the gun barrel docking seat 10 is locked inside the gun barrel docking head 9, realizing a stable connection.

[0051] Furthermore, the filter paper conveying mechanism 4 includes two driving mechanisms 4.1 and two driven mechanisms 4.2. A filter paper roll material 14 is sleeved and installed on one of the driving mechanisms 4.1. The outer end of the filter paper roll material 14 pulls out a filter paper belt 7, which bypasses the two driven mechanisms 4.2 and is fixedly connected to the other driving mechanism 4.1. The two driving mechanisms 4.1 are respectively used as unwinding rollers and winding rollers. Each roll of filter paper roll material 14 can be used for a long time before being replaced, which is convenient for actual operation.

[0052] Furthermore, the driving mechanism 4.1 includes a stepping motor 4.11 and a paper tape wheel 4.12. The stepping motor 4.11 is fixedly installed at the rear side of the partition plate 3. The rotor of the stepping motor 4.11 drives the paper tape wheel 4.12 to rotate. A disc baffle 4.13 is fixedly installed at one end of the paper tape wheel 4.12 close to the stepping motor 4.11. A movable baffle 4.14 is installed at the other end of the paper tape wheel 4.12. A plum blossom hand wheel 4.15 is spirally and cooperatively installed at the end of the paper tape wheel 4.12 away from the stepping motor 4.11. The plum blossom hand wheel 4.15 drives the movable baffle 4.14 to move back and forth on the paper tape wheel 4.12. The movable baffle 4.14 can be removed through the plum blossom hand wheel 4.15 to install the filter paper roll material 14 on the paper tape wheel 4.12. The setting of the disc baffle 4.13 can prevent the filter paper roll material 14 from shifting. After the installation is completed, the plum blossom hand wheel 4.15 will lock the movable baffle 4.14, so that the filter paper roll material 14 is located between the disc baffle 4.13 and the movable baffle 4.14. Then, the stepping motor 4.11 is used to drive the filter paper belt 7 pulled out from the filter paper roll material 14, realizing the effect of precise positioning and conveying.

[0053] Furthermore, the driven mechanism 4.2 includes a bearing seat 4.21, a driven shaft 4.22 and a driven wheel 4.23. The bearing seat 4.21 is fixedly installed on the partition plate 3. The pressing and sealing mechanism 5 and the photoelectric detection mechanism 6 are located between the bearing seats 4.21 of the two driven mechanisms 4.2. Precise positioning can be realized when the filter paper belt 7 is input into the pressing and sealing mechanism 5 and the photoelectric detection mechanism 6, effectively reducing the detection error.

[0054] Furthermore, positioning baffles 4.24 are fixedly installed at both ends of the driven wheel 4.23, enabling the filter paper belt 7 to be stably pressed against the driven wheel 4.23 for conveying, and the filter paper belt 7 will not shift and disengage from the driven wheel 4.23 during the conveying process.

[0055] Further: Two encoders 4.25 are fixedly installed at the rear side of the partition plate 3, and the encoders 4.25 are arranged at the rear ends of the driven mechanisms 4.2 in a one-to-one correspondence; the rotation distance of the driven mechanism 4.2 can be accurately measured, so as to accurately judge whether the filter paper belt 7 has moved in place, and high-precision particulate matter detection is realized.

[0056] Further: The pressing and sealing mechanism 5 includes an electric push rod 5.1, a heat insulation plate 5.2, a fixed seat 5.3, a nozzle tube 5.4 and a heating seat 5.5. The fixed seat 5.3 and the heating seat 5.5 are both fixedly installed on the partition plate 3. The nozzle tube 5.4 is installed in the fixed seat 5.3 in a lifting and sliding fit. The heat insulation plate 5.2 is fixedly installed at the rear side of the partition plate 3. The electric push rod 5.1 is fixedly installed on the heat insulation plate 5.2. The electric push rod 5.1 drives the nozzle tube 5.4 to move up and down in the fixed seat 5.3. The heating seat 5.5 is located below the fixed seat 5.3. The filter paper belt 7 is arranged through the gap between the heating seat 5.5 and the fixed seat 5.3. The upper end of the nozzle tube 5.4 is communicated with the gas transmission pipe 8; before the particulate matter detection of the flue gas, the electric push rod 5.1 drives the nozzle tube 5.4 to press down, so that the filter paper belt 7 is pressed on the heating seat 5.5. A sealed connection can be formed between the upper side surfaces of the nozzle tube 5.4 and the heating seat 5.5. At this time, the heating seat 5.5 heats the internal flue gas and the filter paper belt 7. After the heating is completed, the flue gas is conveyed into the nozzle tube 5.4 through the gas transmission pipe 8. At this time, the particulate matter on the flue gas will adhere to the filter paper belt 7. After waiting for a period of time, the conveyance of the flue gas is stopped. The electric push rod 5.1 drives the nozzle tube 5.4 to rise. At the same time, the filter paper conveying mechanism 4 drives the filter paper belt 7 with adhered particulate matter to be conveyed into the photoelectric detection mechanism 6, and high-precision detection of the particulate matter is realized by using beta rays, and a high-precision concentration value is obtained.

[0057] Further: An air passing groove 5.6 is formed in the heating seat 5.5. Both ends of the air passing groove 5.6 extend out of the heating seat 5.5. A wrapped filter screen 5.7 is fixedly installed at the upper end of the air passing groove 5.6. The nozzle tube 5.4 is located above the wrapped filter screen 5.7. A taper joint 5.8 is fixedly installed at the other end of the air passing groove 5.6; it is convenient for the conveyance of the flue gas after passing through the filter paper belt 7.

[0058] Further: A fixing ring 5.9 is fixedly installed at the lower end of the nozzle tube 5.4. A first O-ring 5.10 is fixedly installed on the lower side of the fixing ring 5.9. The nozzle tube 5.4 is pressed on the air passing groove 5.6 of the heating seat 5.5 through the first O-ring 5.10; when the nozzle tube 5.4 is pressed down, it can be sealed on the heating seat 5.5, realizing the connection seal between the nozzle tube 5.4 and the air passing groove 5.6, and preventing air leakage, thereby ensuring the accurate detection effect.

[0059] Further: A spring 5.11 is installed in abutting connection between the nozzle tube 5.4 and the fixed seat 5.3, and the spring 5.11 is sleeved on the outer side of the nozzle tube 5.4; so that when the nozzle tube 5.4 is pressed down, it can be more stably pressed on the heating seat 5.5, forming a stable gas path connection.

[0060] Further: A positioning cylinder 5.12 is fixedly installed in the fixed seat 5.3, the nozzle tube 5.4 moves up and down in the positioning cylinder 5.12, and one or more second O-ring seals 5.13 are installed in abutting connection between the nozzle tube 5.4 and the positioning cylinder 5.12; the stable up and down movement of the nozzle tube 5.4 can be realized by using the positioning cylinder 5.12, and the setting of the second O-ring seals 5.13 can form a sealing structure between the nozzle seat 5.4 and the positioning cylinder 5.12, and there will be no air leakage during the up and down movement, thereby ensuring the accuracy of flue gas detection.

[0061] Further: The photoelectric detection mechanism 6 includes a beta ray detector 6.1, a support seat 6.2 and a beta source 6.3. The support seat 6.2 is fixedly installed on the partition plate 3. A cutting groove 6.4 is formed on the front side of the support seat 6.2. The filter paper tape 7 is arranged through the cutting groove 6.4. The beta ray detector 6.1 is fixedly installed on the support seat 6.2, and the bottom end of the beta ray detector 6.1 is arranged to penetrate into the cutting groove 6.4. A positioning support 6.5 is fixedly installed on the bottom side in the cutting groove 6.4, and the beta source 6.3 is fixedly installed in the positioning support 6.5; when the filter paper tape 7 with particulate matter attached is conveyed into the cutting groove 6.4, the beta ray detector 6.1 is turned on, and the beta ray detector 6.1 can emit beta rays to penetrate through the filter paper tape 7 and irradiate on the beta source 6.3, thereby achieving the effect of accurately detecting the particulate matter concentration. The utility model can obtain a high-precision flue gas concentration value through beta ray technology.

[0062] Further: A main board module 15 and a 4G wireless communication module 16 are fixedly installed in the sampling host 1. The main board module 15 controls the filter paper conveying mechanism 4, the pressing and sealing mechanism 5 and the photoelectric detection mechanism 6 to work through the 4G wireless communication module 16; the setting of the main board module 15 can facilitate the control of the sampling host 1 to work, and the setting of the 4G wireless communication module 16 can realize the remote control of the sampling host 1.

[0063] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention all belong to the protection scope of the technical solution of the present invention.

Claims

1. High-precision dust and gas sampling device, including a sampling host and a sampling tube, one end of the sampling tube is connected to the sampling host; characterized in that: A partition is fixedly installed inside the sampling host, and a filter paper conveying mechanism, a pressing and sealing mechanism, and a photoelectric detection mechanism are installed on the partition. A filter paper belt is connected to the filter paper conveying mechanism, and the filter paper conveying mechanism drives the filter paper belt to pass through the pressing and sealing mechanism and the photoelectric detection mechanism one by one; An air delivery pipe is arranged at the upper end of the pressing and sealing mechanism, and the air delivery pipe is connected to the sampling tube.

2. The high-precision dust and gas sampling device according to claim 1, wherein: A gun rod docking head is fixedly installed on the sampling host, and a gun rod docking seat is fixedly installed at one end of the sampling tube close to the sampling host. A detachable connection is formed between the gun rod docking seat and the gun rod docking head.

3. The high-precision dust and gas sampling device according to claim 1, characterized in that: The filter paper conveying mechanism includes two driving mechanisms and two driven mechanisms. A filter paper coil is sleeved and installed on one of the driving mechanisms, and the outer end of the filter paper coil pulls out the filter paper belt, bypasses the two driven mechanisms, and is fixedly connected to the other driving mechanism.

4. The high-precision dust and gas sampling device according to claim 3, characterized in that: The driving mechanism includes a stepping motor and a paper tape wheel. The stepping motor is fixedly installed at the rear side of the partition, the rotor of the stepping motor drives the paper tape wheel to rotate, a disc baffle is fixedly installed at one end of the paper tape wheel close to the stepping motor, a movable baffle is installed at the other end of the paper tape wheel, and a plum blossom handwheel is installed in a spiral fit at the end of the paper tape wheel away from the stepping motor. The plum blossom handwheel drives the movable baffle to move back and forth on the paper tape wheel.

5. The high-precision dust and gas sampling device according to claim 3, characterized in that: The driven mechanism includes a bearing seat, a driven shaft, and a driven wheel. The bearing seat is fixedly installed on the partition, and the pressing and sealing mechanism and the photoelectric detection mechanism are located between the bearing seats of the two driven mechanisms.

6. The high-precision dust and gas sampling device according to any one of claims 3 or 5, characterized in that: Two encoders are fixedly installed at the rear side of the partition, and the encoders are arranged corresponding to the rear ends of the driven mechanisms one by one.

7. The high-precision dust and gas sampling device according to claim 1, characterized in that: The pressing and sealing mechanism includes an electric push rod, a heat insulation plate, a fixed seat, a nozzle tube, and a heating seat. The fixed seat and the heating seat are both fixedly installed on the partition. The nozzle tube is installed in the fixed seat in a lifting and sliding fit. The heat insulation plate is fixedly installed at the rear side of the partition, the electric push rod is fixedly installed on the heat insulation plate, the electric push rod drives the nozzle tube to move up and down in the fixed seat. The heating seat is located below the fixed seat. The filter paper belt passes through the gap between the heating seat and the fixed seat. The upper end of the nozzle tube is communicated with the air delivery pipe.

8. The high-precision dust-gas co-sampling device according to claim 7, characterized in that: An air passing groove is formed in the heating seat, both ends of the air passing groove lead out of the heating seat, a wrapped filter screen is fixedly installed at the upper end of the air passing groove, the nozzle tube is located above the wrapped filter screen, and a pagoda joint is fixedly installed at the other end of the air passing groove.

9. The high-precision dust and gas co-sampling device according to claim 8, characterized in that: A fixed ring is fixedly installed at the lower end of the nozzle tube, and a first O-ring is fixedly installed on the lower side of the fixed ring. The nozzle tube presses on the air passing groove of the heating seat through the first O-ring.

10. The high-precision dust and gas sampling device according to claim 1, characterized in that: The photoelectric detection mechanism includes a β-ray detector, a support seat, and a beta source. The support seat is fixedly installed on the partition, a cutting groove is formed on the front side of the support seat, the filter paper belt passes through the cutting groove, the β-ray detector is fixedly installed on the support seat, the bottom end of the β-ray detector leads into the cutting groove, and a positioning support is fixedly installed on the bottom side in the cutting groove. The beta source is fixedly installed in the positioning support.

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