Sampling device for fluoride-containing waste gas detection

Abstract

The invention relates to the technical field of waste gas sampling, in particular to a fluoride-containing waste gas detecting and sampling device which comprises a fixing ring. The device further comprises a heat-conducting ring, a placing ring and the like. The fixing ring is fixedly connected with a heat conduction ring made of heat conduction materials, and the heat conduction ring is located on the inner side of the external chimney. The fixing ring is fixedly connected with a containing ring, the containing ring is fixedly connected with the heat conduction ring, and the containing ring is made of heat conduction materials. The two sampling barrels and the two inner rings are arranged inside and outside, the inner rings are located on the inner sides of the corresponding sampling barrels, the temporary storage groove is jointly formed in the area between the two sampling barrels, and after sampling is completed, the inner rings rotate to enable the sampling holes and the round holes to be staggered, so that part of high-temperature waste gas is reserved in the temporary storage groove; furthermore, the high-temperature waste gas in the temporary storage tank is used for preserving heat of the waste gas sample collected in the sampling barrel on the inner side, so that the heat preservation effect on the waste gas sample is improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas sampling, and in particular to a sampling device for detecting fluoride-containing waste gas. Background Art

[0002] The emission of flue gas in industrial production is usually accompanied by greater environmental pollution. Therefore, it is necessary to sample the emitted waste gas and detect harmful substances in the waste gas to determine whether the waste gas meets the emission standards. For example, Chinese patent publication number CN117705518B discloses a boiler flue gas detection device, which, through the setting of the detection tube, can sample the flue gas state in the natural flow state inside the chimney during sampling, thereby helping to avoid the situation when sampling is performed by suction. When the flue gas treatment is abnormal, particulate matter exists in the flue gas, resulting in different flow speeds of the particulate matter and the gas during suction, so that when sampling is performed by suction, there is an error in the particulate matter content in the sampled flue gas, resulting in inaccurate sampling results.

[0003] However, since the exhaust gas emitted by the boiler is usually accompanied by high temperature, the existing sampling equipment extends the detection tube out of the outer shell to allow the exhaust gas to flow naturally in the detection tube. Due to the large difference between the temperature of the detection tube and the exhaust gas, the exhaust gas flows naturally in the detection tube. The moisture in the exhaust gas will condense on the detection tube and the sampling tube, which will cause the high-temperature exhaust gas to come into contact with the condensed water in the sampling tube when the exhaust gas is sampled and stored in the sampling tube, causing the composition of the exhaust gas to change, thereby affecting the accuracy of subsequent sample detection. Summary of the invention

[0004] In order to overcome the shortcomings of existing sampling equipment in which the detection tube is extended out of the outer casing to allow the exhaust gas to flow naturally in the detection tube, due to the large difference between the temperature of the detection tube and the exhaust gas temperature, the moisture in the exhaust gas will condense on the detection tube and the sampling tube, affecting the accuracy of subsequent sample detection, the present invention provides a sampling device for detecting fluoride-containing exhaust gas.

[0005] The technical implementation scheme of the present invention is: a sampling device for detecting fluoride-containing waste gas, comprising a fixed ring; also comprising a heat-conducting ring, a placement ring, a sampling assembly and a sample removal assembly; the fixed ring is fixedly connected to a heat-conducting ring made of a heat-conducting material, and the heat-conducting ring is located on the inner side of an external chimney; the fixed ring is fixedly connected to a placement ring, and the placement ring is fixedly connected to the heat-conducting ring, and the placement ring is made of a heat-conducting material; the upper side of the placement ring and the inner side of the fixed ring jointly form a placement portion for temporarily storing waste gas samples; the fixed ring is connected to a sampling assembly for sampling chimney waste gas, and the sampling assembly is located on the upper side of the placement ring; the fixed ring is connected to a sample removal assembly for taking away the chimney waste gas sample.

[0006] As an improvement to the above solution, the cross section of the heat conducting ring is arranged in an eight-shaped shape.

[0007] As an improvement of the above solution, a baffle ring is also included; the heat conducting ring is fixedly connected to a plurality of baffle rings.

[0008] As an improvement of the above solution, the fixing ring, the heat-conducting ring and the placement ring jointly form a storage tank, and the storage tank is filled with heat-conducting liquid containing phase change material.

[0009] As an improvement of the above scheme, the sampling assembly includes an electric guide rail, a moving block, an electric push rod, a connecting ring, an electric rotating plate, a magnet, a sampling tube, a DD motor, a connecting plate and an inner ring; the fixed ring is fixedly connected to the electric guide rail; the electric guide rail is slidably connected to the moving block; the moving block is fixedly connected to the electric push rod; the fixed ring is rotatably connected to the connecting ring; the connecting ring is provided with a rectangular groove; the connecting ring is rotatably connected to the electric rotating plate, and the electric rotating plate is located at the rectangular groove, and the electric rotating plate is used to block the rectangular groove; the electric push rod The telescopic end is fixedly connected with a magnet; a sampling tube made of magnetic material is placed on the placement ring, and the sampling tube is magnetically attracted to the magnet, and the sampling tube is placed horizontally, and the outer surface of the sampling tube is arc-shaped; a plurality of sampling holes are provided in the sampling tube; a DD motor is fixedly connected to the telescopic end of the electric push rod; a connecting plate is plugged into the output shaft of the DD motor; a non-magnetic inner ring is fixedly connected to the connecting plate, and the inner ring is located on the inner side of the sampling tube, and the inner ring is rotatably connected to the sampling tube; a plurality of circular holes are provided in the inner ring, and the circular holes and the sampling holes are staggered.

[0010] As an improvement of the above scheme, two inner and outer sampling tubes are provided, and the two sampling tubes are fixedly connected by a connecting part; the area between the two sampling tubes jointly forms a temporary storage groove; the inner ring is also provided with two inner and outer rings, both of which are fixedly connected to the connecting plate, and both of the inner rings are rotatably connected to the corresponding sampling tubes, and the rotatably connected inner rings are located on the inner side of the corresponding sampling tubes.

[0011] As an improvement of the above solution, the sampling holes on the two sampling tubes are staggered and the circular holes on the two inner rings are also staggered.

[0012] As an improvement to the above solution, the inner ring is made of heat-insulating material.

[0013] As an improvement of the above scheme, it also includes a filter screen; a plurality of filter screens are fixedly connected to the inner wall of the outer inner ring, and the filter screens are in contact with the inner sampling tube.

[0014] As an improvement of the above scheme, the sample removal assembly includes a swivel, an electric cover and a guide plate; the fixed ring is rotatably connected to the swivel, and the swivel is fixed to the moving block through a support plate; the swivel is rotatably connected to the electric cover, and the electric cover is located directly above the sampling tube; the connecting ring is fixedly connected to two inclined guide plates, and the two guide plates together form an inverted V-shaped guide groove.

[0015] Beneficial effect: The present invention conducts the high-temperature heat of the exhaust gas to the placement portion through the placement ring, heats up the sampling component in the placement portion, reduces the temperature difference between the sampling component and the external high-temperature smoke exhaust gas, and then controls the sampling component to sample the high-temperature exhaust gas. The sampling component extends out of the placement portion, and after the sampling is completed, the exhaust gas sample is temporarily stored in the placement portion formed by the fixed ring and the placement ring. In this way, the sampling component in the placement portion is first heated up to reduce the temperature difference between the sampling component and the external high-temperature smoke exhaust gas, which can avoid the problem of condensed water in the sampling component due to the temperature difference when the exhaust gas circulates in the sampling component, thereby ensuring the accuracy of subsequent sample detection.

[0016] During the sampling process of the present invention, the outer inner ring rotates to drive the filter screen to rotate, so that the filter screen is located on both sides of the sampling hole and the circular hole aligned with the inner sampling tube. The airflow enters the inner sampling tube through the filter screen after being deflected, so that the filter screen filters the fly ash impurities in the exhaust gas, thereby preventing more fly ash impurities from entering the inner sampling tube and affecting subsequent detection.

[0017] The present invention provides two sampling tubes and two inner rings, and the inner ring is located on the inner side of the corresponding sampling tube, and the area between the two sampling tubes jointly forms a temporary storage groove. After the sampling is completed, the inner ring rotates to stagger the sampling hole and the circular hole, so that part of the high-temperature exhaust gas is retained in the temporary storage groove, and the high-temperature exhaust gas in the temporary storage groove keeps the exhaust gas sample collected in the inner sampling tube warm, thereby improving the insulation effect of the exhaust gas sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure disclosed by the present invention for the sampling device for detecting fluoride-containing waste gas; Figure 2 A cross-sectional view of the sampling device for detecting fluoride-containing waste gas disclosed in the present invention; Figure 3 It is a schematic diagram of the internal structure of the fixing ring disclosed in the sampling device for detecting fluoride-containing waste gas of the present invention from a first viewing angle; Figure 4 It is a schematic diagram of the internal structure of the fixing ring disclosed in the sampling device for detecting fluoride-containing waste gas of the present invention from a second viewing angle, wherein the sampling tube is in an extended state; Figure 5 A schematic diagram of the internal structure of the fixing ring disclosed in the fluoride-containing waste gas detection sampling device of the present invention from a third viewing angle; Figure 6 This is a schematic diagram of a first combination structure of an electric push rod, a magnet, a sampling tube, a DD motor, a connecting plate, and an inner ring disclosed in the present invention for a sampling device for detecting fluoride-containing waste gas; Figure 7It is a schematic diagram of a second combination structure of the electric push rod, magnet, sampling tube, DD motor, connecting plate and inner ring disclosed in the sampling device for detecting fluoride-containing waste gas of the present invention; Figure 8 The exhaust gas flow state diagram disclosed by the sampling device for detecting fluoride-containing exhaust gas of the present invention; Fig. 9 The present invention is a schematic diagram of the combined structure of a sampling tube, an inner ring and a filter screen disclosed in the sampling device for detecting fluoride-containing waste gas.

[0019] The numbers in the figure are as follows: 1-fixed ring, 101-heat-conducting ring, 102-placing ring, 103-baffle ring, 201-electric guide rail, 202-moving block, 203-electric push rod, 204-connecting ring, 205-electric rotating plate, 206-magnet, 207-sampling tube, 208-DD motor, 209-connecting plate, 2010-inner ring, 2011-filter screen, 2012-baffle, 301-rotating ring, 302-electric cover plate, 303-guide plate, 11-placing part, 1011-storage tank, 2072-sampling hole, 2071-temporary storage tank, 2001-round hole, 2073-connecting part, 2041-rectangular tank. DETAILED DESCRIPTION

[0020] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0021] Example 1 A sampling device for detecting fluoride-containing waste gas, such as Figure 1-Figure 5 As shown, it includes a fixing ring 1; It also includes a heat-conducting ring 101, a placement ring 102, a sampling assembly and a sample removal assembly; the fixed ring 1 is fixedly connected to the copper heat-conducting ring 101, and the heat-conducting ring 101 is located on the inner side of the external chimney; the fixed ring 1 is fixedly connected to the placement ring 102, and the placement ring 102 is fixedly connected to the heat-conducting ring 101, and the placement ring 102 is made of heat-conducting material; the upper side of the placement ring 102 and the inner side of the fixed ring 1 jointly form a placement portion 11; the fixed ring 1 is connected to the sampling assembly, and the sampling assembly is located on the upper side of the placement ring 102; the fixed ring 1 is connected to the sample removal assembly.

[0022] The cross section of the heat conductive ring 101 is arranged in an eight-shaped configuration, thereby guiding the rising high-temperature exhaust gas, increasing the contact area between the heat conductive ring 101 and the exhaust gas, and improving the heat conduction efficiency.

[0023] It also includes a baffle ring 103; three baffle rings 103 are fixedly connected to the lower side of the heat conductive ring 101 to slow down the speed of exhaust gas flowing through the heat conductive ring 101, delay the contact time between the exhaust gas and the heat conductive ring 101, and improve the heating efficiency of the exhaust gas on the heat conductive ring 101.

[0024] The fixing ring 1 , the heat-conducting ring 101 , and the placement ring 102 together form a storage tank 1011 , and the storage tank 1011 is filled with heat-conducting liquid containing phase change material.

[0025] When in use, the sampling device is installed at the exhaust chimney. Before sampling of the discharged high-temperature exhaust gas is required, since the diameter of the fixing ring 1 is consistent with the diameter of the external chimney, when the high-temperature exhaust gas rises and is discharged from the chimney, the exhaust gas will first contact the placement ring 102, thereby transferring the high-temperature heat of the exhaust gas to the placement portion 11 through the placement ring 102, and heating the sampling component in the placement portion 11 to reduce the temperature difference between the sampling component and the external high-temperature exhaust gas. Then, the sampling component is controlled to sample the high-temperature exhaust gas, and the sampling component extends out of the placement portion 11. After sampling, the exhaust gas sample is temporarily stored in the placement portion 11 formed by the fixing ring 1 and the placement ring 102. In this way, the sampling component in the placement portion 11 is first heated to reduce the temperature difference between the sampling component and the external high-temperature exhaust gas, which can avoid the exhaust gas from leaking. When the gas circulates in the sampling component, the exhaust gas produces condensed water in the sampling component due to the temperature difference, thereby ensuring the accuracy of subsequent sample detection, and then the high-temperature exhaust gas sample in the placement part 11 is taken away by the sample removal component, and the components in the exhaust gas are subsequently accurately detected and analyzed; and at the end of sampling, the sample removal component takes away the high-temperature exhaust gas sample in the placement part 11, and the sampling component is first retracted into the placement part 11. At this time, the heated placement part 11 performs an insulation operation on the exhaust gas inside the sampling component, so that the sample removal component takes away the high-temperature exhaust gas sample in the placement part 11, avoiding the influence of cooling of the exhaust gas, and further ensuring the accuracy of subsequent sample detection; because the heat for heating the exhaust gas sample comes from the high-temperature exhaust gas discharged from the chimney, no external heat generation is required, which is beneficial to energy saving.

[0026] At the same time, when there is no high-temperature exhaust gas discharged from the chimney, the exhaust gas sample on the placement part 11 will lose the heating effect of the high-temperature exhaust gas and cool down quickly. Therefore, by pre-storing the thermal liquid in the storage tank 1011, when the high-temperature exhaust gas rises and passes through the thermal ring 101, the thermal ring 101 and the thermal liquid replace the placement ring 102, and the thermal ring 101 heats the thermal liquid. The high thermal conductivity of the thermal liquid itself allows the thermal liquid to quickly absorb heat to heat the placement part 11. When there is no high-temperature exhaust gas discharged from the chimney, since the thermal liquid contains phase change material, the thermal liquid has heat storage capacity, and then the heat stored in the thermal liquid can continuously release heat to heat the placement ring 102, thereby improving the heating and insulation effect of the placement ring 102 on the exhaust gas sample on the placement part 11.

[0027] Example 2 On the basis of Example 1, Figure 2-Figure 9 As shown, the sampling assembly includes an electric guide rail 201, a moving block 202, an electric push rod 203, a connecting ring 204, an electric rotating plate 205, a magnet 206, a sampling tube 207, a DD motor 208, a connecting plate 209 and an inner ring 2010; the electric guide rail 201 is fixedly connected to the inner side of the fixed ring 1; the electric guide rail 201 is slidably connected to the moving block 202; the moving block 202 is bolted to the electric push rod 203; the fixed ring 1 is rotatably connected to the connecting ring 204; the connecting ring 204 is provided with a rectangular groove 2041; the connecting ring 204 is rotatably connected to the electric rotating plate 205, and the electric rotating plate 205 is located at the rectangular groove 2041, and the electric rotating plate 205 is used to block the rectangular groove 2041; the electric push rod 203 The telescopic end is fixedly connected with a magnet 206; a sampling tube 207 made of magnetic material is placed on the placing ring 102, and the sampling tube 207 is magnetically attracted to the magnet 206, and the sampling tube 207 is placed horizontally, and the outer surface of the sampling tube 207 is arc-shaped; a plurality of sampling holes 2072 are provided in the sampling tube 207; a DD motor 208 is fixedly connected to the telescopic end of the electric push rod 203; a connecting plate 209 is plugged into the output shaft of the DD motor 208; a non-magnetic inner ring 2010 is fixedly connected to the connecting plate 209, and the inner ring 2010 is located on the inner side of the sampling tube 207, and the inner ring 2010 is rotatably connected to the sampling tube 207; a plurality of circular holes 2001 are provided in the inner ring 2010, and the circular holes 2001 and the sampling holes 2072 are staggered.

[0028] The sampling tube 207 is provided with two inner and outer ones, and the two sampling tubes 207 are fixedly connected by a connecting portion 2073; the area between the two sampling tubes 207 jointly forms a temporary storage groove 2071; the inner ring 2010 is also provided with two inner and outer ones, and the two inner rings 2010 are fixedly connected to the connecting plate 209, and the two inner rings 2010 are rotatably connected to the corresponding sampling tube 207, and the rotatably connected inner rings 2010 are located on the inner side of the corresponding sampling tube 207.

[0029] The sampling holes 2072 on the two sampling tubes 207 are staggered, and the circular holes 2001 on the two inner rings 2010 are also staggered, thereby slowing down the flow rate of the exhaust gas when it passes through the temporary storage groove 2071 into the sampling holes 2072 of the inner sampling tube 207, extending the contact time of the exhaust gas with the temporary storage groove 2071, increasing the amount of exhaust gas entering the temporary storage groove 2071, and thereby improving the heating efficiency of the exhaust gas on the temporary storage groove 2071.

[0030] The inner ring 2010 is made of heat-insulating material. After sampling is completed, the high-temperature exhaust gas entering the temporary storage tank 2071 is insulated from the outside world, extending the insulation time of the high-temperature exhaust gas in the temporary storage tank 2071 on the exhaust gas in the sampling tube 207, thereby improving the sampling accuracy.

[0031] It also includes a filter screen 2011; a plurality of filter screens 2011 are fixedly connected to the inner wall of the outer inner ring 2010, and the filter screens 2011 are in contact with the inner sampling tube 207.

[0032] The baffle 2012 is also included; the telescopic end of the electric push rod 203 is fixedly connected with the baffle 2012, and the baffle 2012 is inserted into the rectangular groove 2041 to seal the rectangular groove 2041.

[0033] The operation steps of the sampling assembly in Example 1 are as follows: when it is necessary to sample the high-temperature exhaust gas, the electric push rod 203 is controlled to drive the magnet 206 and the DD motor 208 to move toward the side close to the center of the fixed ring 1, until the magnet 206 tightly magnetically attracts the outer side of the sampling tube 207, and the output shaft of the DD motor 208 is plugged into the connecting plate 209, and then the electric rotating plate 205 is controlled to rotate to open the rectangular groove 2041, and then the electric push rod 203 is continued to be controlled to make the magnet 206 and the DD motor 208 drive the sampling tube 207, the connecting plate 209, and the inner ring 2010 to move toward the side close to the center of the fixed ring 1, until the sampling tube 207 is completely extended out of the connecting ring 204, as shown in FIG. Figure 5 As shown, to perform exhaust gas sampling operation; When sampling, the DD motor 208 is controlled to start, and the output shaft of the DD motor 208 drives the connecting plate 209 and the inner ring 2010 to rotate. Since the sampling tube 207 cannot rotate due to the magnet 206, the inner ring 2010 and the sampling tube 207 rotate relative to each other until the sampling hole 2072 is aligned with the circular hole 2001. Figure 6As shown, when the rising high-temperature exhaust gas passes through the sampling cylinder 207, it first passes through the sampling hole 2072 and the corresponding circular hole 2001 on the lower side of the sampling cylinder 207 and then enters the interior of the sampling cylinder 207, and then continues to rise and be discharged from the sampling hole 2072 and the corresponding circular hole 2001 on the upper side, so that the high-temperature exhaust gas forms a continuously rising airflow inside the sampling cylinder 207; after the rising exhaust gas flow inside the sampling cylinder 207 stabilizes, that is, after the exhaust gas flows in the sampling cylinder 207 for a period of time, the DD motor 208 is controlled to start again, and the output shaft of the DD motor 208 drives the connecting plate 209 and the inner ring 2010 to rotate rapidly until the sampling hole 2072 and the circular hole 2001 are quickly offset, thereby locking the high-temperature exhaust gas inside the sampling cylinder 207, and then The sampling of high-temperature exhaust gas is completed. Since the sampling tube 207 is placed horizontally and the outer surface of the sampling tube 207 is arc-shaped, the interference and obstruction of the sampling tube 207 on the rising exhaust gas flow is reduced, so that the exhaust gas flow rises smoothly after contacting the sampling tube 207, thereby improving the accuracy of the sampling tube 207 in exhaust gas sampling; then, the electric push rod 203 is controlled to make the magnet 206 and the DD motor 208 drive the sampling tube 207, the connecting plate 209, and the inner ring 2010 to move to the side away from the center of the fixed ring 1 until the sampling tube 207 is fully extended into the initial position in the placement part 11, and then, the electric rotating plate 205 is controlled to rotate to close the rectangular groove 2041 to prevent the exhaust gas rising from the chimney from entering the fixed ring 1 through the rectangular groove 2041.

[0034] During the sampling process, two sampling barrels 207 and two inner rings 2010 are respectively provided inside and outside, and the inner ring 2010 is located inside the corresponding sampling barrel 207, and the area between the two sampling barrels 207 jointly forms a temporary storage groove 2071, and the two sampling barrels 207 are fixedly connected to each other through the connecting portion 2073, and the sampling barrel 207 and the corresponding inner ring 2010 are rotatably connected. Therefore, when the connecting plate 209 is driven to rotate by the output shaft of the DD motor 208, the two sampling barrels 207 remain stationary, the two inner rings 2010 rotate relative to the corresponding sampling barrel 207, and the sampling holes 2072 on the two sampling barrels 207 are staggered. 0 is also staggered, so during the sampling process, the exhaust gas first passes through the sampling hole 2072 and the circular hole 2001 of the outer sampling cylinder 207 and enters the temporary storage tank 2071. After the airflow enters the temporary storage tank 2071, the exhaust gas passes through the sampling hole 2072 of the inner sampling cylinder 207 and the circular hole 2001 of the inner inner ring 2010 and enters the inner sampling cylinder 207. Since the sampling holes 2072 and the inner ring 2010 on the outer sampling cylinder 207 and the inner sampling cylinder 207 and the inner ring 2010 are staggered, the exhaust gas flows in a baffled manner when entering the inner sampling cylinder 207, as shown in FIG. Figure 8As shown; after the sampling is completed, the inner ring 2010 rotates to stagger the sampling hole 2072 and the circular hole 2001, so that part of the high-temperature exhaust gas is retained in the temporary storage tank 2071, and the high-temperature exhaust gas in the temporary storage tank 2071 keeps the exhaust gas sample collected by the inner sampling tube 207 warm, thereby improving the insulation effect of the exhaust gas sample.

[0035] During the sampling process, the outer inner ring 2010 rotates to drive the filter screen 2011 to rotate, so that the filter screen 2011 is located on both sides of the sampling hole 2072 and the circular hole 2001 aligned with the inner sampling tube 207, as shown in FIG. Figure 8 As shown, the airflow passes through the filter screen 2011 after being deflected and enters the inner sampling cylinder 207, so that the filter screen 2011 filters the fly ash impurities in the exhaust gas, thereby preventing a large amount of fly ash impurities from entering the inner sampling cylinder 207 and affecting subsequent detection; After the exhaust gas enters the temporary storage tank 2071 and then enters the inner sampling tube 207, the fly ash impurities in the exhaust gas will adhere to the inner wall of the temporary storage tank 2071, thereby hindering the effect of the high-temperature exhaust gas in the temporary storage tank 2071 on the exhaust gas sample in the sampling tube 207 to keep it warm. Therefore, when the inner ring 2010 rotates to stagger the sampling hole 2072 and the circular hole 2001, the outer inner ring 2010 drives the filter screen 2011 to rotate, and the filter screen 2011 scrapes off the fly ash impurities attached to the outer wall of the inner sampling tube 207, thereby improving the efficiency of the high-temperature exhaust gas in the temporary storage tank 2071 in keeping the exhaust gas sample in the sampling tube 207 warm.

[0036] After the electric turn plate 205 rotates to open the rectangular groove 2041 and the telescopic end of the electric push rod 203 pushes the sampling tube 207 from the rectangular groove 2041 to the connecting ring 204, the exhaust gas will enter the placement portion 11 from the rectangular groove 2041 during the rising process, causing greater pollution to the placement portion 11, and then impurities remain in the placement portion 11, reducing the heat transfer efficiency of the high-temperature flue gas. Therefore, when the telescopic end of the electric push rod 203 pushes the sampling tube 207, the telescopic end of the electric push rod 203 drives the baffle 2012 to move until the baffle 2012 is stuck in the rectangular groove 2041, and then the rectangular groove 2041 is sealed during the sampling process to prevent the exhaust gas from entering the placement portion 11 from the rectangular groove 2041 during the rising process.

[0037] When it is necessary to sample the exhaust gas discharged from different positions of the chimney, after the telescopic end of the electric push rod 203 pushes the sampling tube 207 out of the connecting ring 204, the electric guide rail 201 is controlled to make the moving block 202 drive the electric push rod 203 and the sampling tube 207 to rotate to a predetermined position for sampling. At the same time, the telescopic end of the electric push rod 203 causes the baffle 2012 to push the connecting ring 204 and the electric rotating plate 205 to follow the sampling tube 207 to rotate on the fixed ring 1, thereby improving the diversity of sampling.

[0038] Example 3 On the basis of Example 2, Figure 2-Figure 5 As shown, the sample removal assembly includes a swivel 301, an electric cover 302 and a guide plate 303; the fixed ring 1 is rotatably connected to the swivel 301, and the swivel 301 is fixedly connected to the moving block 202 through a support plate; the swivel 301 is rotatably connected to the electric cover 302, and the electric cover 302 is located directly above the sampling tube 207; the connecting ring 204 is fixedly connected to two inclined guide plates 303, and the two guide plates 303 together form an inverted V-shaped guide groove.

[0039] The operating steps of the sample removal component in Example 1 are as follows: since the position of the chimney is usually relatively high, when it is necessary to remove the sampling tube 207 storing the high-temperature exhaust gas sample in the placement portion 11, the external drone is manually controlled to move to the position directly above the electric cover 302, and then the electric cover 302 is controlled to rotate and open, and then the magnetic suction module on the external drone is controlled to magnetically attract the sampling tube 207 on the placement ring 102, and the external drone drives the sampling tube 207 to rise, and takes the sampling tube 207 out of the placement portion 11, completing the removal step, and then the external drone vertically places the new sampling tube 207 into the placement portion 11, and forms an inverted V-shaped guide groove through the two guide plates 303, as shown in FIG. Figure 3 As shown, the sampling tube 207 is guided and positioned so that the sampling tube 207 is aligned with the telescopic end of the electric push rod 203 after falling onto the placement ring 102, which is convenient for the next sampling. When the sampling tube 207 contacts the placement ring 102 through the two guide plates 303, the two guide plates 303 limit the upper part of the sampling tube 207 to ensure that the sampling tube 207 is stably placed and prevent the sampling tube 207 from rolling in the placement part 11. When sampling at different positions of the chimney, the moving block 202 drives the rotating ring 301 and the electric cover plate 302 to rotate, so that the electric cover plate 302 is always located directly above the sampling tube 207, which is convenient for directly taking out the sampling tube 207 after the electric cover plate 302 is opened, and the guide plate 303 rotates synchronously with the connecting ring 204.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampling device for detecting fluoride-containing waste gas, comprising a fixing ring (1); wherein: It also comprises a heat-conducting ring (101), a placement ring (102), a sampling assembly and a sample removal assembly; the fixed ring (1) is fixedly connected to a heat-conducting ring (101) made of a heat-conducting material, and the heat-conducting ring (101) is located on the inner side of an external chimney; the fixed ring (1) is fixedly connected to a placement ring (102), and the placement ring (102) is fixedly connected to the heat-conducting ring (101), and the placement ring (102) is made of a heat-conducting material; the upper side of the placement ring (102) and the inner side of the fixed ring (1) together form a placement portion (11) for temporarily storing exhaust gas samples; the fixed ring (1) is connected to a sampling assembly for sampling exhaust gas from the chimney, and the sampling assembly is located on the upper side of the placement ring (102); the fixed ring (1) is connected to a sample removal assembly for removing exhaust gas samples from the chimney.

2. A sampling device for detecting fluoride-containing waste gas according to claim 1, characterized in that: The cross section of the heat conducting ring (101) is arranged in an eight-shaped shape.

3. A sampling device for detecting fluoride-containing waste gas according to claim 2, characterized in that: It also includes a retaining ring (103); the heat conducting ring (101) is fixedly connected to a plurality of retaining rings (103).

4. A sampling device for detecting fluoride-containing waste gas according to claim 1, characterized in that: The fixing ring (1), the heat-conducting ring (101), and the placement ring (102) together form a storage groove (1011), and the storage groove (1011) is filled with heat-conducting liquid containing phase change material.

5. A sampling device for detecting fluoride-containing waste gas according to claim 1, characterized in that: The sampling assembly comprises an electric guide rail (201), a moving block (202), an electric push rod (203), a connecting ring (204), an electric rotating plate (205), a magnet (206), a sampling tube (207), a DD motor (208), a connecting plate (209) and an inner ring (2010); the fixed ring (1) is fixedly connected to the electric guide rail (201); the electric guide rail (201) is slidably connected to the moving block (202); the moving block (202) is fixedly connected to the electric push rod (203); the fixed ring (1) is rotatably connected to the connecting ring (204); the connecting ring (204) is provided with a rectangular groove (2041); the connecting ring (204) is rotatably connected to the electric rotating plate (205), and the electric rotating plate (205) is located at the rectangular groove (2041), and the electric rotating plate (205) is used to block the rectangular groove (2041); the electric push rod (203 ) is fixedly connected to a magnet (206) at its telescopic end; a sampling tube (207) made of a magnetic material is placed on the placement ring (102), the sampling tube (207) and the magnet (206) are magnetically attracted to each other, the sampling tube (207) is placed horizontally, and the outer surface of the sampling tube (207) is arc-shaped; the sampling tube (207) is provided with a plurality of sampling holes (2072); a DD motor (208) is fixedly connected to the telescopic end of the electric push rod (203) The output shaft of the DD motor (208) is plugged with a connecting plate (209); the connecting plate (209) is fixedly connected with a non-magnetic inner ring (2010), and the inner ring (2010) is located on the inner side of the sampling tube (207), and the inner ring (2010) is rotatably connected to the sampling tube (207); the inner ring (2010) is provided with a plurality of circular holes (2001), and the circular holes (2001) and the sampling holes (2072) are staggered.

6. A sampling device for detecting fluoride-containing waste gas according to claim 5, characterized in that: The sampling tube (207) is provided with two inner and outer ones, and the two sampling tubes (207) are fixedly connected via a connecting portion (2073); the area between the two sampling tubes (207) jointly forms a temporary storage groove (2071); the inner ring (2010) is also provided with two inner and outer ones, the two inner rings (2010) are both fixedly connected to the connecting plate (209), the two inner rings (2010) are both rotatably connected to the corresponding sampling tube (207), and the rotatably connected inner rings (2010) are both located on the inner side of the corresponding sampling tube (207).

7. A sampling device for detecting fluoride-containing waste gas according to claim 6, characterized in that: The sampling holes (2072) on the two sampling tubes (207) are distributed in a staggered manner, and the circular holes (2001) on the two inner rings (2010) are also distributed in a staggered manner.

8. A sampling device for detecting fluoride-containing waste gas according to claim 7, characterized in that: The inner ring (2010) is made of thermal insulation material.

9. A sampling device for detecting fluoride-containing waste gas according to claim 8, characterized in that: It also includes a filter screen (2011); a plurality of filter screens (2011) are fixedly connected to the inner wall of the outer inner ring (2010), and the filter screens (2011) are in contact with the inner sampling tube (207).

10. A sampling device for detecting fluoride-containing waste gas according to claim 1, characterized in that: The sample removal assembly comprises a rotating ring (301), an electric cover plate (302) and a guide plate (303); the fixed ring (1) is rotatably connected to the rotating ring (301), and the rotating ring (301) is fixedly connected to the moving block (202) via a support plate; the rotating ring (301) is rotatably connected to the electric cover plate (302), and the electric cover plate (302) is located directly above the sampling tube (207); the connecting ring (204) is fixedly connected to two inclined guide plates (303), and the two guide plates (303) together form an inverted V-shaped guide groove.

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