A flue gas sampling device for high-temperature denitrification flue gas detection

Abstract

The present invention discloses a flue gas sampling device for high-temperature denitrification flue gas detection, which belongs to the technical field of flue gas sampling; it includes a gun body, the left side of the gun body is fixedly connected to a connecting pipe, the upper side of the gun body is fixedly connected to a threaded pipe, the threaded pipe and the connecting pipe are communicated, the upper side of the threaded pipe is rotatably connected to a gun barrel, the inner sleeve of the gun barrel is provided with a filter plug, the filter plug and the inner wall of the gun barrel are abutted, the upper side of the gun barrel is threadedly provided with a gun head, and the upper side of the gun head is fixedly connected to a hose. In the process of collecting flue gas, under the action of the cross plate in the correction component, the collection head is made relative to the direction of flue gas flow in both horizontal and vertical directions, and the collection head and the direction of flue gas flow are in a parallel state, thereby completing the collection operation of flue gas well, allowing the flue gas to perfectly enter the collection head, improving the efficiency of flue gas collection, and the overall operation is automatically performed without the need for manual adjustment, and the collection efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas sampling, and in particular to a flue gas sampling device for detecting high-temperature denitrification flue gas. Background Art

[0002] High-temperature denitrification is a technical means of converting SO2 into oxides under high-temperature conditions. Currently, the working efficiency of high-temperature denitrification can be obtained mainly by testing the high-temperature denitrification flue gas. In the process of sampling the high-temperature denitrification flue gas, a sampling gun is mainly used. Compared with other sampling equipment, the sampling gun has a longer pipe, which can prevent the high temperature from causing harm to the staff.

[0003] However, in the actual sampling process, in order to ensure the sampling effect, the direction of the sampling head and the direction of the flue gas flow must be parallel, and the flue gas can just enter the sampling gun. The above operation is mainly adjusted manually, which is time-consuming and labor-intensive, and the adjustment results are generally poor. The sampling head and the direction of the flue gas flow often deviate, thereby reducing the flue gas collection effect. In addition, during the flue gas collection process, the filter needs to be stuffed into the barrel. After long-term use, the filter needs to be checked and replaced frequently, which is time-consuming and labor-intensive, and the filtering effect of the filter cannot be maximized. Moreover, after long-term use, a certain amount of dust will accumulate on the inner wall of the barrel, affecting the sampling effect of the sampling gun. Therefore, a flue gas sampling device for high-temperature denitrification flue gas detection is provided. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, such as: in order to ensure the sampling effect, the direction of the sampling head and the direction of the flue gas flow must be parallel. The above operation is mainly adjusted manually, which is time-consuming and labor-intensive, and the adjustment result is general. The sampling head and the direction of the flue gas flow often deviate, thereby reducing the flue gas collection effect. In addition, during the flue gas collection process, the filter needs to be stuffed into the gun barrel. After long-term use, the filter needs to be checked and replaced frequently, which is time-consuming and labor-intensive, and the filtering effect of the filter cannot be maximized. Moreover, after long-term use, a certain amount of dust will accumulate on the inner wall of the gun barrel, affecting the sampling effect of the sampling gun. A flue gas sampling device for high-temperature denitrification flue gas detection is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A flue gas sampling device for high-temperature denitrification flue gas detection includes a gun body, a connecting pipe is fixedly connected to the left side of the gun body, a threaded pipe is fixedly connected to the upper side of the gun body, the threaded pipe and the connecting pipe are communicated, the upper side of the threaded pipe is rotatably connected to a gun barrel, a filter plug is provided inside the gun barrel, the filter plug and the inner wall of the gun barrel are abutted against each other, a gun head is provided on the upper threaded sleeve of the gun barrel, a hose is fixedly connected to the upper side of the gun head, a collection head is fixedly connected to the side of the hose away from the gun head, and a correction component for the collection direction of the collection tube is provided on the left side of the gun head.

[0007] The cam is connected to the left side of the driving mechanism, and the cam is connected with the control wheel of the driving mechanism, and the control wheel is connected with the control wheel of the driving mechanism.

[0008] Preferably, the outer sides of the two control rods are fixedly connected with a clamping rod, the sides of the two splints close to each other are fixedly connected with a fixed tube, the rotating rod passes through the fixed tube, the fixed sleeve inside the fixed tube is provided with an inner serrated ring, and the clamping rod and the inner serrated ring are arranged opposite to each other.

[0009] Preferably, a moving component for controlling the movement of the moving frame is provided on the left side of the gun body, and the moving component includes a moving rod, a fixed ring, and a moving ring. The moving rod is located at the lower side of the moving frame and is fixedly connected to the moving frame. The fixed ring is fixedly sleeved on the outside of the gun body. The lower side of the fixed ring is fixedly connected to a third spring, and the lower side of the third spring is fixedly connected to a moving ring. The moving ring sleeve is provided on the outside of the gun body and is slidably connected to the gun body up and down. The moving rod passes through the moving ring and is fixedly connected to the moving ring. The outer threaded sleeve of the threaded tube is provided with a threaded ring, and the threaded ring is located on the lower side of the moving rod.

[0010] Preferably, a plurality of collars are slidably sleeved on the outer side of the gun body, the plurality of collars are located between the fixed ring and the gun head, and the plurality of collars are fixedly connected to the movable rod.

[0011] Preferably, a first spring is fixedly connected to the upper side of the gun head, an extrusion ring is fixedly connected to the lower side of the first spring, the extrusion ring and the filter plug are abutted against each other, two fixed plates are symmetrically fixedly connected inside the gun barrel, a cleaning ring is provided on the sliding sleeve inside the gun barrel, and the cleaning ring is located between the fixed plate and the filter plug.

[0012] Preferably, a cleaning assembly for the inner wall of the barrel is provided in the barrel, and the cleaning assembly includes an auxiliary rod, a contact plate, a sliding rod, and a threaded groove. The auxiliary rod is located between the moving rod and the barrel, and the auxiliary rod and the moving rod are fixedly connected. A through groove is provided on the side wall of the barrel, and the moving rod passes through the through groove and is slidably connected to the through groove up and down. The contact plate is located in the barrel and fixedly connected to the auxiliary rod. The contact plate is located at the lower side of the cleaning ring and abuts against the cleaning ring. A threaded groove is provided in the barrel, and a sliding rod is fixedly connected to the outer side of the cleaning ring. The sliding rod and the threaded groove are slidably connected.

[0013] Preferably, a sealing plate is provided on the outer fixed sleeve of the auxiliary rod, the sealing plate is located on the outer side of the through slot, the sealing plate abuts against the outer wall of the barrel, and the upper and lower lengths of the sealing plate are much greater than the upper and lower lengths of the through slot.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] First, during the smoke collection process, the cross plate in the correction component makes the collection head face the direction of smoke flow in both horizontal and vertical directions. The collection head and the smoke flow direction are in a parallel state, which can effectively complete the smoke collection operation and allow the smoke to enter the collection head perfectly, thereby improving the smoke collection efficiency. The whole operation is automatic and does not require manual adjustment, resulting in high collection efficiency.

[0016] During the smoke collection process, the position of the moving rod inside the moving assembly can be changed to understand the amount of large particles on the upper side of the filter plug. When the distance between the moving rod and the threaded ring is short, it means that there are too many large particles on the upper side of the filter plug, and the filter plug needs to be replaced to ensure the normal operation of subsequent smoke collection operations.

[0017] When replacing the filter plug, move the moving rod upward, and the moving rod drives the cleaning ring and the filter plug to move upward through a series of transmission structures. When the cleaning ring moves upward, under the action of the sliding rod and the threaded groove, the cleaning ring will also rotate, thereby cleaning the inner wall of the gun body and the upper side of the filter plug, maintaining the cleanliness of the inside of the gun body, and thus not causing adverse effects on the flue gas collection operation between replacing the filter plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a flue gas sampling device for high-temperature denitrification flue gas detection proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of the connection between the gun body, gun barrel, and gun head in a flue gas sampling device for high-temperature denitrification flue gas detection proposed by the present invention;

[0020] Figure 3 This is a schematic diagram of the cleaning component structure proposed by the present invention;

[0021] Figure 4 This is a schematic diagram of the correction component structure proposed by the present invention;

[0022] Figure 5 This is a schematic structural diagram of the correction component proposed by the present invention from another angle;

[0023] Figure 6 This is a schematic diagram of the connection between the moving block and the transmission block proposed in the present invention;

[0024] Figure 7 for Figure 5 A magnified view of the structure at point A;

[0025] Figure 8 This is a schematic diagram of the mobile component structure proposed in the present invention.

[0026] In the figure: 1 gun body; 2 circular grip; 3 connecting tube; 4 threaded tube; 5 gun barrel; 6 gun head; 7 collection head; 8 correction assembly; 801 cross plate; 802 moving frame; 803 moving block; 804 rotating rod; 805 splint; 806 right-angle rod; 807 transmission block; 808 correction rod; 809 correction plate; 810 second spring; 811 control rod; 812 transmission rod; 813 fixed cylinder; 814 inner serrated ring; 815 clamping rod; 816 square rod; 9 hose; 10 moving assembly; 101 moving rod; 102 collar; 103 fixed ring; 104 third spring; 105 moving ring; 106 threaded ring; 11 filter plug; 12 fixed plate; 13 through groove; 14 auxiliary rod; 15 contact plate; 16 sealing plate; 17 threaded groove; 18 slide rod; 19 first spring; 20 squeeze ring; 21 cleaning ring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be explained clearly below with reference to the accompanying drawings in the embodiments of the present invention; it will be described completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] A flue gas sampling device for high temperature denitrification flue gas detection, such as Figures 1-8As shown, it includes a gun body 1, a connecting pipe 3 is fixedly connected to the left side of the gun body 1, a threaded pipe 4 is fixedly connected to the upper side of the gun body 1, the threaded pipe 4 and the connecting pipe 3 are in communication, and a gun barrel 5 is rotatably connected to the upper side of the threaded pipe 4. A filter plug 11 is provided inside the gun barrel 5, and the filter plug 11 abuts against the inner wall of the gun barrel 5. A gun head 6 is threadedly provided on the upper side of the gun barrel 5, and a hose 9 is fixedly connected to the upper side of the gun head 6. A collection head 7 is fixedly connected to the side of the hose 9 away from the gun head 6. A collection direction correction component 8 for the collection tube is provided on the left side of the gun head 6;

[0029] like Figure 2 When it is necessary to perform a detection operation on the high-temperature denitrification flue gas, first connect the connecting pipe 3 to the detection equipment, and extend the collection head 7 into the pipeline to be detected. The flue gas inside the pipeline enters the detection equipment through the "collection head 7-hose 9-nozzle-gun body 1-connecting pipe 3" method, and the various gas contents inside the flue gas are detected and analyzed, and finally the flue gas detection operation is completed. The above are all existing technologies and no redundant details are given;

[0030] like Figure 4 、 Figure 5 、 Figure 6 The correction assembly 8 includes a cross plate 801, a moving block 803, and a rotating rod 804. The cross plate 801 is located on the left side of the collection head 7. The side of the cross plate 801 close to the collection head 7 is fixedly connected to the correction rod 808. The side of the correction rod 808 close to the collection head 7 is fixedly connected to the transmission block 807. The outer fixed sleeve of the transmission block 807 is provided with a transmission rod 812. The outer two sides of the transmission rod 812 are provided with the same moving frame 802. The moving frame 802 and the gun body 1 are connected to each other by sliding up and down. The moving block 803 is located between the transmission block 807 and the rotating rod 804. A correction plate 809 is provided on the left side of the moving block 803. The correction plate 809 is provided through the second The spring 810 is connected to the moving block 803, and the correction plate 809 is symmetrically fixedly connected to one side of the moving block 803 with two control rods 811. The two control rods 811 pass through the moving block 803 and are slidably connected to the moving block 803. The right side of the moving block 803 is fixedly connected with a square rod 816. The side of the square rod 816 away from the moving block 803 is fixedly connected to the rotating rod 804. Both sides of the rotating rod 804 are rotatably connected with a splint 805. The splint 805 is located on the upper side of the gun head 6 and is fixedly connected to the gun head 6. The outer side of the rotating rod 804 is also symmetrically fixedly connected with two right-angle rods 806, and the two right-angle rods 806 are fixedly connected to the collection head 7.

[0031] First, the gun body 1 and the threaded tube 4 are rotatably connected. Secondly, due to the special shape of the cross plate 801, when the collection tube enters the detection environment, the smoke flowing inside the smoke and the cross plate 801 cooperate with each other, so that the cross plate 801 can cooperate with the direction of smoke flow. This structure has the same function as the tail wing in a wind turbine in real life. The cross plate 801 is perpendicular to the direction of smoke flow, so that the direction of the collection head 7 is exactly opposite to the direction of smoke flow, thereby better completing the smoke collection operation. Secondly, during the rotation of the transmission block 807, the transmission block 807 is always against the correction plate 809, and the second spring 810 is in a compressed state. When the gun head 6 needs to be replaced or repaired, the transmission block 807 and the correction plate 809 can be disconnected, which will not adversely affect the normal operation of the gun head 6.

[0032] like Figure 7 The outer sides of the two control rods 811 are fixedly connected with a clamping rod 815, and the sides of the two splints 805 close to each other are fixedly connected with a fixed cylinder 813. The rotating rod 804 passes through the fixed cylinder 813. The inner sleeve of the fixed cylinder 813 is fixed with an inner serrated ring 814. The clamping rod 815 and the inner serrated ring 814 are arranged opposite to each other.

[0033] First, when the transmission block 807 and the correction plate 809 are disconnected, under the action of the second spring 810, the correction plate 809 drives the control rod 811 to move to the left, and the control rod 811 drives the clamping rod 815 to move to the left. The clamping rod 815 and the inner serrated ring 814 are against each other, and the control rod 811 and the moving block 803 are clamped, thereby completing the clamping operation of the rotating rod 804 and the collection head 7 as a whole, fixing the position of the collection head 7, and preventing the collection head 7 and the gun head 6 from colliding and causing damage to the collection head 7 and the gun head 6.

[0034] like Figure 8 , a moving assembly 10 for controlling the movement of the moving frame 802 is provided on the left side of the gun body 1, and the moving assembly 10 includes a moving rod 101, a fixing ring 103, and a moving ring 105. The moving rod 101 is located at the lower side of the moving frame 802 and is fixedly connected to the moving frame 802, the fixing ring 103 is fixedly sleeved on the outer side of the gun body 1, the lower side of the fixing ring 103 is fixedly connected to a third spring 104, the lower side of the third spring 104 is fixedly connected to a moving ring 105, the moving ring 105 is sleeved on the outer side of the gun body 1 and is slidably connected to the gun body 1 up and down, the moving rod 101 passes through the moving ring 105 and is fixedly connected to the moving ring 105, the outer thread sleeve of the threaded tube 4 is provided with a threaded ring 106, and the threaded ring 106 is located on the lower side of the moving rod 101;

[0035] During normal use, under the limiting effect of the third spring 104, the transmission block 807 is always against the correction plate 809. When the movable frame 802 and the cross plate 801 need to be moved, the movable rod 101 is moved downward. When the device is restored to its original state, the movable rod 101 drives the movable frame 802 back to its original position under the action of the third spring 104, and the position of the collection tube is corrected.

[0036] The outer side of the gun body 1 is also slidably provided with a plurality of collars 102, which are located between the fixed ring 103 and the gun head 6. The collars 102 are fixedly connected to the moving rod 101, thereby improving the connection between the moving assembly 10 and the gun body 1, thereby improving the overall stability of the moving assembly 10;

[0037] A first spring 19 is fixedly connected to the upper side of the gun head 6, and an extrusion ring 20 is fixedly connected to the lower side of the first spring 19. The extrusion ring 20 and the filter plug 11 are abutted against each other. Two fixed plates 12 are symmetrically fixedly connected to the barrel 5. A cleaning ring 21 is provided in the sliding sleeve of the barrel 5. The cleaning ring 21 is located between the fixed plate 12 and the filter plug 11.

[0038] like Figure 3 , a cleaning assembly for the inner wall of the barrel 5 is provided in the barrel 5, and the cleaning assembly includes an auxiliary rod 14, a contact plate 15, a slide rod 18, and a threaded groove 17. The auxiliary rod 14 is located between the moving rod 101 and the barrel 5, and the auxiliary rod 14 and the moving rod 101 are fixedly connected. A through groove 13 is provided on the side wall of the barrel 5, and the moving rod 101 passes through the through groove 13 and is slidably connected to the through groove 13 up and down. The contact plate 15 is located in the barrel 5 and is fixedly connected to the auxiliary rod 14. The contact plate 15 is located at the lower side of the cleaning ring 21 and is against the cleaning ring 21. A threaded groove 17 is provided in the barrel 5, and a slide rod 18 is fixedly connected to the outer side of the cleaning ring 21. The slide rod 18 and the threaded groove 17 are slidably connected.

[0039] First, the filter plug 11 can filter the gas inside the intake flue gas and remove large particles such as dust therein. The threaded ring 106 is rotated to adjust the distance between the threaded ring 106 and the moving rod 101. During the flue gas collection process, the filter plug 11, the cleaning ring 21, and the contact plate 15 are offset against each other, and the device as a whole is in a balanced state. Then, during the continuous collection process, large particles accumulate on the upper side of the filter plug 11, causing the filter plug 11 to become heavier as a whole. The filter plug 11 drives the auxiliary rod 14 to move downward through the cleaning ring 21 and the contact plate 15, and the auxiliary rod 14 drives the moving rod 101 to move downward, and the distance between the moving rod 101 and the threaded ring 106 is adjusted. When the moving rod 101 and the threaded ring 106 are against each other, it means that there are too many large particles on the upper side of the filter plug 11, and the filter plug 11 needs to be replaced in time. When the filter plug 11 needs to be replaced, the gun head 6 is first unscrewed from the gun body 1, and then the moving rod 101 is moved upward. The moving rod 101 drives the auxiliary rod 14 to move upward, and the auxiliary rod 14 drives the cleaning ring 21 to move upward through the contact plate 15. Under the action of the threaded groove 17 and the sliding rod 18, the cleaning ring 21 will also rotate during the upward movement of the cleaning ring 21, thereby completing a simple cleaning operation on the inner wall of the gun body 1, preventing large particles from accumulating on the inner wall of the gun body 1 and affecting the next flue gas collection work;

[0040] The outer fixed sleeve of the auxiliary rod 14 is provided with a sealing plate 16, which is located on the outer side of the through groove 13. The sealing plate 16 and the outer wall of the barrel 5 are in contact with each other, and the vertical length of the sealing plate 16 is much greater than the vertical length of the through groove 13.

[0041] Under the action of the sealing plate 16 , even if the auxiliary rod 14 moves up and down, the smoke inside the gun body 1 will not move out from the through groove 13 , thereby ensuring the sealing performance of the entire device.

[0042] In the present invention, when it is necessary to perform a detection operation on the high-temperature denitrification flue gas, first connect the connecting pipe 3 and the detection equipment, and extend the collection head 7 into the pipe that needs to be detected. The flue gas inside the pipe enters the detection equipment through the "collection head 7-hose 9-nozzle-gun body 1-connecting pipe 3" method, and the various gas contents inside the flue gas are detected and analyzed, and finally the flue gas detection operation is completed. The above are all existing technologies and no unnecessary details are given. In this process, due to the special shape of the cross plate 801, when the collection pipe enters the detection environment, the flue gas flowing inside the flue gas and the cross plate 801 cooperate with each other, so that the cross plate 801 can cooperate with the direction of the flue gas flow. This structure has the same function as the tail wing in a wind turbine in real life. The cross plate 801 is perpendicular to the direction of the flue gas flow, so that the direction of the collection head 7 can be exactly opposite to the direction of the flue gas flow, thereby better completing the flue gas collection operation. In the process of flue gas collection, the filter plug 11, the cleaning ring 21, and the contact plate 15 are offset against each other, and the device as a whole In a state of equilibrium, during the continuous collection process, large particles accumulate on the upper side of the filter plug 11, causing the filter plug 11 to become heavier as a whole. The filter plug 11 drives the auxiliary rod 14 downward through the cleaning ring 21 and the contact plate 15, and the auxiliary rod 14 drives the moving rod 101 downward. The distance between the moving rod 101 and the threaded ring 106 increases. When the moving rod 101 and the threaded ring 106 are against each other, it means that there are many large particles on the upper side of the filter plug 11, and the filter plug 11 needs to be replaced in time. When the filter plug 11 needs to be replaced, first unscrew the gun head 6 from the gun body 1, and then move the moving rod 101 upward. The moving rod 101 drives the auxiliary rod 14 to move upward, and the auxiliary rod 14 drives the cleaning ring 21 to move upward through the contact plate 15. Under the action of the threaded groove 17 and the sliding rod 18, the cleaning ring 21 will also rotate during the upward movement of the cleaning ring 21, thereby completing a simple cleaning operation on the inner wall of the gun body 1 to prevent large particles from accumulating on the inner wall of the gun body 1 and affecting the next flue gas collection work.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A flue gas sampling device for high-temperature denitrification flue gas detection, comprising a gun body (1), characterized in that: The left side of the gun body (1) is fixedly connected to a connecting pipe (3), the upper side of the gun body (1) is fixedly connected to a threaded pipe (4), the threaded pipe (4) and the connecting pipe (3) are in communication, the upper side of the threaded pipe (4) is rotatably connected to a gun barrel (5), the inner sleeve of the gun barrel (5) is provided with a filter plug (11), the filter plug (11) and the inner wall of the gun barrel (5) are in contact with each other, the upper side of the gun barrel (5) is threadedly provided with a gun head (6), the upper side of the gun head (6) is fixedly connected to a hose (9), and the side of the hose (9) away from the gun head (6) is fixedly connected to a collection head (7). A correction assembly (8) for the collection direction of the collection tube is provided on the left side of the gun head (6), and the correction assembly (8) includes a cross plate (801), a moving block (803), and a rotating rod (804). The cross plate (801) is located on the left side of the collection head (7). A correction rod (808) is fixedly connected to the side of the cross plate (801) close to the collection head (7). A transmission block (807) is fixedly connected to the side of the correction rod (808) close to the collection head (7). A transmission rod (812) is fixedly provided on the outer fixed sleeve of the transmission block (807). The transmission rod (812) The outer two sides of the rotating sleeve are provided with a same moving frame (802), the moving frame (802) and the gun body (1) are connected in an up-down sliding manner, the moving block (803) is located between the transmission block (807) and the rotating rod (804), a correction plate (809) is provided on the left side of the moving block (803), the correction plate (809) is connected to the moving block (803) through a second spring (810), and the correction plate (809) is symmetrically fixedly connected to one side of the moving block (803) close to the two control rods (811), and the two control rods (811) pass through the moving block (803). 03) and the moving block (803) are slidably connected, the right side of the moving block (803) is fixedly connected to a square rod (816), the side of the square rod (816) away from the moving block (803) is fixedly connected to the rotating rod (804), both sides of the rotating rod (804) are rotatably connected to a clamping plate (805), the clamping plate (805) is located on the upper side of the gun head (6) and is fixedly connected to the gun head (6), and the outer side of the rotating rod (804) is also symmetrically fixedly connected to two right-angle rods (806), and the two right-angle rods (806) are fixedly connected to the collection head (7).

2. The flue gas sampling equipment for high-temperature denitrification flue gas detection according to claim 1 is characterized in that: The outer sides of the two control rods (811) are fixedly connected to a clamping rod (815), and the sides of the two clamping plates (805) close to each other are fixedly connected to a fixed cylinder (813). The rotating rod (804) passes through the fixed cylinder (813), and the inner side of the fixed cylinder (813) is fixedly sleeved with an inner sawtooth ring (814). The clamping rod (815) and the inner sawtooth ring (814) are arranged opposite to each other.

3. The flue gas sampling equipment for high-temperature denitrification flue gas detection according to claim 2 is characterized in that: The left side of the gun body (1) is provided with a moving assembly (10) for controlling the movement of the moving frame (802), the moving assembly (10) comprising a moving rod (101), a fixing ring (103), and a moving ring (105), the moving rod (101) being located at the lower side of the moving frame (802) and being fixedly connected to the moving frame (802), the fixing ring (103) being fixedly sleeved on the outer side of the gun body (1), the lower side of the fixing ring (103) being fixedly connected to a third spring (104), the lower side of the third spring (104) being fixedly connected to a moving ring (105), the moving ring (105) being sleeved on the outer side of the gun body (1) and being slidably connected to the gun body (1) in an upward and downward manner, the moving rod (101) passing through the moving ring (105) and being fixedly connected to the moving ring (105), the outer thread sleeve of the threaded tube (4) being provided with a threaded ring (106), the threaded ring (106) being located at the lower side of the moving rod (101).

4. The flue gas sampling equipment for high-temperature denitrification flue gas detection according to claim 3 is characterized in that: The outer side of the gun body (1) is also slidably provided with a plurality of collars (102), the plurality of collars (102) being located between the fixing ring (103) and the gun head (6), and the plurality of collars (102) and the moving rod (101) being fixedly connected.

5. The flue gas sampling equipment for high-temperature denitrification flue gas detection according to claim 4 is characterized in that: A first spring (19) is fixedly connected to the upper side of the gun head (6), and an extrusion ring (20) is fixedly connected to the lower side of the first spring (19). The extrusion ring (20) and the filter plug (11) are in contact with each other. Two fixed plates (12) are symmetrically fixedly connected to the gun barrel (5). A cleaning ring (21) is provided on a sliding sleeve inside the gun barrel (5). The cleaning ring (21) is located between the fixed plate (12) and the filter plug (11).

6. The flue gas sampling equipment for high-temperature denitrification flue gas detection according to claim 5, characterized in that: The gun barrel (5) is provided with a cleaning assembly for the inner wall of the gun barrel (5), and the cleaning assembly includes an auxiliary rod (14), a contact plate (15), a slide rod (18), and a threaded groove (17). The auxiliary rod (14) is located between the moving rod (101) and the gun barrel (5), and the auxiliary rod (14) and the moving rod (101) are fixedly connected. The side wall of the gun barrel (5) is provided with a through groove (13). The moving rod (101) passes through the through groove (13) and is slidably connected to the through groove (13) up and down. The contact plate (15) is located in the gun barrel (5) and is fixedly connected to the auxiliary rod (14). The contact plate (15) is located at the lower side of the cleaning ring (21) and is against the cleaning ring (21). The gun barrel (5) is provided with a threaded groove (17). The outer side of the cleaning ring (21) is fixedly connected with a slide rod (18), and the slide rod (18) and the threaded groove (17) are slidably connected.

7. The flue gas sampling equipment for high-temperature denitrification flue gas detection according to claim 6, characterized in that: The outer fixed sleeve of the auxiliary rod (14) is provided with a sealing plate (16), the sealing plate (16) is located outside the through groove (13), the sealing plate (16) and the outer wall of the barrel (5) are in contact with each other, and the upper and lower lengths of the sealing plate (16) are greater than the upper and lower lengths of the through groove (13).

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