Burner tangent circle diameter measuring device and method

Abstract

The invention belongs to the technical field of boiler burner installation and cold test, particularly relates to a burner tangent circle diameter measuring device and method, and provides the following scheme aiming at solving the problems that a center rod is fixed by welding or extruding, the process is tedious, the center offset is easily caused, the measuring precision is reduced, a boiler is easily damaged and the maintenance cost is increased in the existing device. A plurality of combustors are arranged in the boiler body at equal intervals, an anti-abrasion fixing assembly is arranged in the boiler body, and a positioning assembly is arranged on the anti-abrasion fixing assembly. According to the combustor tangent circle diameter measuring device and method disclosed by the invention, the situation that the detection platform does not shift and shake in the detection process is ensured by utilizing the adsorption effect of a plurality of suction cups in the anti-wear fixing assembly, and meanwhile, a plurality of rubber reinforcing balls are extruded and fixed; the supporting stability is greatly improved while the inner wall of the boiler body is not damaged, the accuracy of a detection result is guaranteed, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of boiler burner installation and cold state test, and particularly relates to a burner tangent diameter measuring device and method. BACKGROUND

[0002] The burner tangent diameter measurement refers to determining the size of the imaginary tangent circle in the pulverized coal boiler through the cold state modeling test or numerical simulation, and the measurement purpose is to evaluate and optimize the actual expansion and mixing of the burner jet in the furnace, because the tangent diameter directly affects the aerodynamic field in the furnace, the coal combustion efficiency, the flame center position and the temperature distribution, which plays a role in guiding the combustion adjustment, preventing slagging or high temperature corrosion caused by flame wall collision, and reducing the nitrogen oxide emission, so as to ensure the safe, clean and economic operation of the boiler, and the measurement is mainly applied to the design, commissioning and operation optimization field of the coal or biomass combustion system of the thermal power plant, large industrial boiler and the like.

[0003] When measuring the burner tangent diameter, the center rod needs to be fixed after confirming the center point of the furnace, and the detection platform for fixing the center rod of the existing burner tangent diameter measuring device is usually built in the boiler by welding or extrusion fixing, and the process is more complicated by welding, which is easy to cause the center rod to deviate from the center point of the furnace, reduce the accuracy of the detection result, and both ways are easy to damage the boiler, thereby increasing the maintenance cost. SUMMARY

[0004] The present application discloses a burner tangent diameter measuring device and method, which aims to solve the technical problems in the background art that the existing device adopts welding or extrusion to fix the center rod, the process is complicated and easy to cause the center to deviate, reduce the measurement accuracy, and easily damage the boiler, thereby increasing the maintenance cost.

[0005] The burner tangent diameter measuring device provided by the present application comprises a boiler body, a plurality of burners are arranged at equal intervals in the inside of the boiler body, an anti-wear fixing assembly is arranged in the inside of the boiler body, a positioning assembly is arranged on the anti-wear fixing assembly, the anti-wear fixing assembly comprises a fixed frame, the fixed frame is located in the inside of the boiler body, a cross fixed plate is fixedly connected to the inner wall of the fixed frame, a hole sleeve is fixedly connected to the opening in one side of the cross fixed plate, a hole center rod is slidably connected to the inside of the hole sleeve, and the hole center rod and the hole sleeve can be fixed by bolts.

[0006] In a preferred scheme, the inner wall of the fixed frame is provided with electric telescopic rods at equal intervals, the telescopic ends of the plurality of electric telescopic rods are respectively fixedly connected with setting grooves through the inner wall of the fixed frame, and the plurality of setting grooves are located on the outer side of the fixed frame.

[0007] In a preferred scheme, the inside of the setting groove cylinder is fixedly connected with a setting plate, the side close to the electric telescopic rod of the setting plate is provided with a reinforced telescopic rod, the telescopic end of the reinforced telescopic rod is provided with a rubber reinforced ball through the side of the setting plate, and the upper end outer wall of the setting groove cylinder is fixedly connected with a fixing ring.

[0008] In a preferred scheme, the outer wall of the fixing ring is equidistantly provided with two notches, the inner parts of the two notches are fixedly connected with main movable shafts respectively, and the outer walls of the two main movable shafts are connected with main chain plates through bearings respectively.

[0009] In a preferred scheme, the inner parts of the ends of the two main chain plates away from each other are fixedly connected with movable shafts respectively, the outer walls of the two movable shafts are connected with movable chain plate groups through bearings respectively, the two movable chain plate groups are formed by connecting two movable chain plates through bearings respectively, and the inner parts of the two main chain plates and the two movable chain plate groups are provided with sucking discs respectively, and the adsorption ends of the sucking discs are close to the inner wall of the boiler body.

[0010] In a preferred scheme, the positioning assembly comprises a movable sleeve, the movable sleeve is slidingly connected to the outer wall of the center rod with holes, the movable sleeve and the center rod with holes can be fixed through bolts, one end of the movable sleeve is fixedly connected with a connecting plate, a rotating hole is formed in one side of the connecting plate, a rotating shaft is connected to the inner part of the rotating hole through a bearing, a rotating motor is arranged on one side of the connecting plate, the driving end of the rotating motor is connected to one end of the rotating shaft through a shaft coupling, and the outer wall of the other end of the rotating shaft is fixedly connected with a brake ratchet.

[0011] In a preferred scheme, the outer wall of the movable sleeve is connected with a driven ratchet through a bearing, the driven ratchet and the brake ratchet are engaged, the outer wall of the movable sleeve shaft is connected with a setting sleeve through a bearing, and one end of the setting sleeve is fixedly connected with the driven ratchet.

[0012] In a preferred scheme, the outer wall of one end of the setting sleeve away from the driven ratchet is equidistantly provided with positioning notches, the inner parts of the plurality of positioning notches are fixedly connected with fixing rods respectively, the outer walls of the plurality of fixing rods are connected with positioning plates through bearings respectively, and one side of the plurality of positioning plates is fixedly connected with contact plates respectively.

[0013] In a preferred scheme, the outer wall of the setting sleeve is fixedly connected with a stepping motor, one end of the stepping motor is provided with a telescopic shaft, one end of the telescopic shaft is connected with a movable frame through a bearing, the inner part of the movable frame is provided with a Pitot tube body, one end of the Pitot tube body is provided with a differential pressure sensor, a data processing storage and control unit, the outer wall of the Pitot tube body is provided with a setting groove ring, the outer wall of the telescopic shaft is fixedly connected with a supporting plate, the upper side of the supporting plate is provided with a Pitot tube swing controller, and the driving end of the Pitot tube swing controller and the setting groove ring are connected through bearings.

[0014] A burner tangent diameter measurement method using a burner tangent diameter measurement device as described above, comprising the following steps: Step one, when measuring the burner tangent diameter, the boiler primary fan and the air blower need to be started in advance, and under the condition of boiler cold ventilation, then select a layer of burner in the furnace, connect the horn horn burner with a wire according to the horn horn burner, and the focal points of the above two pairs of angles are the center point of the furnace; Step two, after the center point of the furnace is confirmed, the detection platform is quickly built through the anti-wear fixing assembly, and the center rod with holes in it is accurately fixed at the center point of the furnace; Step three, after the detection platform is built, the Pitot tube body is quickly and accurately moved to the detection area through the positioning assembly, and then the Pitot tube body is used to measure the burner tangent diameter; Step four, after the current burner is measured, the Pitot tube body is rotated to the detection area of the next burner through the positioning assembly, and the detection method in step three is repeated to obtain the tangent diameter of the next burner.

[0015] As can be seen from the above, the burner tangent diameter measurement device provided by the application uses the adsorption effect of the plurality of suction cups in the anti-wear fixing assembly to ensure that the detection platform does not shift or shake during detection, and is fixed by extrusion of the plurality of rubber reinforcing balls, which greatly improves the stability of the support without damaging the inner wall of the boiler body, ensures the accuracy of the detection result and reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure diagram of the burner tangent diameter measurement device is provided. Figure 2 The front view structure diagram of the burner tangent diameter measurement device is provided. Figure 3 The internal overall structure diagram of the burner tangent diameter measurement device is provided. Figure 4 The overall structure diagram of the anti-wear fixing assembly of the burner tangent diameter measurement device is provided. Figure 5 The upper end structure diagram of the electric telescopic rod in the anti-wear fixing assembly of the burner tangent diameter measurement device is provided. Figure 6 The internal section structure diagram of the groove cylinder provided in the anti-wear fixing assembly of the burner tangent diameter measurement device is provided. Figure 7 The exploded structure diagram of the positioning assembly of the burner tangent diameter measurement device is provided. Figure 8 A pitot tube body overall structure schematic diagram of a burner tangent diameter measuring device is provided for the present application.

[0017] In the figure: 1, boiler body; 2, wear-resistant fixing assembly; 201, fixed frame; 202, cross fixed plate; 203, hole sleeve; 204, hole center rod; 205, electric telescopic rod; 206, setting groove cylinder; 207, fixed ring; 208, secondary chain plate group; 209, rubber reinforced ball; 210, main chain plate; 211, suction cup; 212, main movable shaft; 213, reinforced telescopic rod; 214, setting plate; 215, secondary movable shaft; 3, pitot tube body; 4, positioning assembly; 401, movable sleeve; 402, rotary motor; 403, rotary shaft; 404, brake ratchet; 405, setting sleeve; 406, contact plate; 407, positioning plate; 408, fixed rod; 409, driven ratchet; 410, connecting plate; 5, burner; 6, setting groove ring; 7, movable frame; 8, differential pressure sensor and data processing storage and control unit; 9, support plate; 10, stepping motor; 11, telescopic shaft; 12, pitot tube swing controller. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0019] The burner tangent diameter measuring device disclosed in the present application is mainly applied to the scene that the existing device adopts a welded or extruded fixed center rod, the process is complicated, the center is easy to deviate, the measurement precision is reduced, the boiler is easy to be damaged, and the maintenance cost is increased.

[0020] Reference Figures 1-6 A burner tangent diameter measuring device, comprising a boiler body 1, a plurality of burners 5 are arranged at equal intervals in the inside of the boiler body 1, a wear-resistant fixing assembly 2 is arranged in the inside of the boiler body 1, a positioning assembly 4 is arranged on the wear-resistant fixing assembly 2, the wear-resistant fixing assembly 2 comprises a fixed frame 201, the fixed frame 201 is located in the inside of the boiler body 1, a cross fixed plate 202 is fixedly connected to the inner wall of the fixed frame 201, a hole sleeve 203 is fixedly connected to the inside opening of one side of the cross fixed plate 202, a hole center rod 204 is slidably connected to the inside of the hole sleeve 203, and the hole center rod 204 and the hole sleeve 203 can be fixed through bolts.

[0021] In the present application, a plurality of electric telescopic rods 205 are arranged at equal intervals on the inner wall of the fixed frame 201, the telescopic ends of the plurality of electric telescopic rods 205 are respectively fixedly connected with setting groove cylinders 206 through the inner wall of the fixed frame 201, and the plurality of setting groove cylinders 206 are respectively located on the outside of the fixed frame 201.

[0022] In the application, the inner part of the setting groove cylinder 206 is fixedly connected with a setting plate 214, the side close to the electric telescopic rod 205 of the setting plate 214 is provided with a reinforcing telescopic rod 213, the telescopic end of the reinforcing telescopic rod 213 is provided with a rubber reinforcing ball 209 through the side of the setting plate 214, and the upper end outer wall of the setting groove cylinder 206 is fixedly connected with a fixed ring 207.

[0023] In the application, the outer wall of the fixed ring 207 is equidistantly provided with two notches, the inner part of the two notches is respectively fixedly connected with a main movable shaft 212, and the outer wall of the two main movable shafts 212 is respectively connected with a main chain plate 210 through a bearing.

[0024] In the application, the inner part of the two main chain plates 210 away from each other is respectively fixedly connected with a vice movable shaft 215, the outer wall of the two vice movable shafts 215 is respectively connected with a vice chain plate group 208 through a bearing, the two vice chain plate groups 208 are respectively formed by two corresponding vice chain plates connected through a bearing, and the inner part of the two main chain plates 210 and the two vice chain plate groups 208 is respectively provided with a suction disc 211, and the adsorption end of the plurality of suction discs 211 is close to the inner wall of the boiler body 1.

[0025] Specifically, after confirming the furnace center point, the hole center rod 204 is horizontally aligned with the furnace center point, the hole sleeve 203 is moved along the hole center rod 204 in the boiler body 1 together with the fixed frame 201, until it is moved to the appropriate position, then the plurality of electric telescopic rods 205 are started to make the corresponding setting groove cylinder 206 close to the inner wall of the boiler body 1, at this time the plurality of suction discs 211 are adsorbed and fixed with the boiler body 1, thereby completing the preliminary construction of the detection platform, then the plurality of reinforcing telescopic rods 213 are extended to make the corresponding rubber reinforcing balls 209 extrude and fix the inner wall of the boiler body 1, thereby completing the final construction of the detection platform.

[0026] In a specific application scenario, after the preliminary construction of the detection platform is completed, the plurality of suction discs 211 are respectively located on the two main chain plates 210 and the two vice chain plate groups 208, and since the main chain plate 210 and the corresponding vice chain plate group 208 are movably arranged, the inner wall of the boiler body 1 with a certain range of internal shape can be adaptively fixed, thereby improving the working efficiency and installation flexibility, after the final construction of the detection platform is completed, the rubber reinforcing ball 209 is made of rubber material and will not cause damage to the inner wall of the boiler body 1 during extrusion, thereby ensuring that the detection platform will not deviate and shake during detection through the adsorption of the plurality of suction discs 211 in the anti-abrasion fixing assembly 2, and the extrusion and fixation of the plurality of rubber reinforcing balls 209 greatly improve the stability of the support without damaging the inner wall of the boiler body 1, thereby ensuring the accuracy of the detection result and reducing the maintenance cost.

[0027] With reference to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 , in one preferred embodiment, the positioning assembly 4 comprises a movable sleeve 401 which is slidingly connected to the outer wall of the center rod with holes 204, the movable sleeve 401 and the center rod with holes 204 can be fixed by bolts, one end of the movable sleeve 401 is fixedly connected with a connecting plate 410, a rotating hole is formed on one side of the connecting plate 410, a rotating shaft 403 is connected inside the rotating hole through a bearing, a rotating motor 402 is arranged on one side of the connecting plate 410, the driving end of the rotating motor 402 is connected to one end of the rotating shaft 403 through a shaft coupling, and the other end of the rotating shaft 403 is fixedly connected with a brake ratchet wheel 404.

[0028] In the present application, the outer wall of the movable sleeve 401 is connected with a driven ratchet wheel 409 through a bearing, the driven ratchet wheel 409 and the brake ratchet wheel 404 are engaged, the outer wall of the movable sleeve 401 is connected with a setting sleeve 405 through a bearing, and one end of the setting sleeve 405 is fixedly connected with the driven ratchet wheel 409.

[0029] In the present application, the outer wall of one end of the setting sleeve 405 away from the driven ratchet wheel 409 is equally spaced to form positioning notches, a plurality of fixed rods 408 are fixedly connected in the inner part of the positioning notches, respectively, the outer walls of the plurality of fixed rods 408 are connected with positioning plates 407 through bearings, respectively, and one side of the plurality of positioning plates 407 is fixedly connected with contact plates 406, respectively.

[0030] Specifically, the whole positioning assembly 4 is sleeved on the center rod with holes 204 through the movable sleeve 401, then the plurality of positioning plates 407 are opened to be perpendicular to the movable sleeve 401, and then the movable sleeve 401 is slid on the center rod with holes 204, so that the positioning assembly 4 approaches the required burner 5 to be detected, when the upper end contact plates 406 of the plurality of positioning plates 407 contact the corresponding burners 5, it proves that the pitot tube body 3 on it reaches the plane layer of the detection area, wherein the plurality of contact plates 406 contact the corresponding burners 5 to realize rapid and accurate positioning of the detection area, which greatly improves the work efficiency and also ensures the accuracy of the detection result.

[0031] With reference to Figure 1 , Figure 2 , Figure 7 and Figure 8In a preferred scheme, the outer wall of the sleeve 405 is fixedly connected with the stepping motor 10, one end of the stepping motor 10 is provided with the telescopic shaft 11, one end of the telescopic shaft 11 is connected with the movable frame 7 through the bearing, the inside of the movable frame 7 is provided with the pitot tube body 3, one end of the pitot tube body 3 is provided with the differential pressure sensor and the data processing storage and control unit 8, the outer wall of the pitot tube body 3 is provided with the setting groove ring 6, the outer wall of the telescopic shaft 11 is fixedly connected with the support plate 9, the upper side of the support plate 9 is provided with the pitot tube swing controller 12, the driving end of the pitot tube swing controller 12 and the setting groove ring 6 are connected with each other through the bearing.

[0032] A burner circle diameter measuring method using the burner circle diameter measuring device as described above, comprising the following steps: Step one, when measuring the burner 5 circle diameter, the boiler primary air fan and the air blower need to be started in advance, under the condition of boiler cold-state ventilation, then select a layer of burner 5 in the furnace, connect the 1# and 3# burners 5 with a wire, connect the 2# and 4# burners 5 with a wire, the focus of the above two pairs of angle lines is the furnace center point; Step two, after the furnace center point is confirmed, the detection platform is quickly built through the anti-abrasion fixing assembly 2, and the hole center rod 204 in it is accurately fixed at the furnace center point position (in this process, after the hole center rod 204 is horizontally aligned with the furnace center point, the hole sleeve 203 and the fixed frame 204 are made to slide along the hole center rod 204 in the boiler body 1 until they are moved to the appropriate position, then the setting groove cylinder 206 is made to approach the inner wall of the boiler body 1 through the starting of the multiple electric telescopic rods 205, at this time, the multiple suction cups 211 are made to be adsorbed and fixed with the boiler body 1, thereby completing the preliminary building of the detection platform, wherein the multiple suction cups 211 are respectively located on the two main chain plates 210 and the two auxiliary chain plate groups 208, and since the main chain plate 210 and the corresponding auxiliary chain plate group 208 are movably arranged, the inner wall of the boiler body 1 with a certain range of internal shape can be adaptively fixed, thereby improving the working efficiency and installation flexibility, then the rubber reinforcing ball 209 is made to be extruded and fixed to the inner wall of the boiler body 1 through the extension of the multiple reinforcing telescopic rods 213, thereby completing the final building of the detection platform, wherein the rubber reinforcing ball 209 is made of rubber material and will not cause damage to the inner wall of the boiler body 1 during the extrusion process, thereby ensuring that the detection platform will not deviate or shake during the detection process through the adsorption of the multiple suction cups 211 in the anti-abrasion fixing assembly 2, and at the same time, the inner wall of the boiler body 1 is not damaged while the stability of the support is greatly improved through the extrusion and fixation of the multiple rubber reinforcing balls 209, thereby ensuring the accuracy of the detection result and reducing the maintenance cost, finally, the hole center rod 204 is fixed through the bolts); Step three, when the detection platform is built, the Pitot tube body 3 is quickly and accurately moved to the detection area by the positioning assembly 4 (the entire positioning assembly 4 is sleeved on the center rod with holes 204 through the movable sleeve 401, then the multiple positioning plates 407 are opened to be perpendicular to the movable sleeve 401, then the movable sleeve 401 is slid on the center rod with holes 204, so that the positioning assembly 4 is close to the required burner 5, when the upper end of the multiple positioning plates 407 contacts the plate 406 corresponding to the burner 5, it proves that the Pitot tube body 3 on it reaches the plane layer of the detection area, wherein the multiple contact plates 406 contact the corresponding burner 5 to realize the quick and accurate positioning of the detection area, which greatly improves the work efficiency and ensures the accuracy of the detection result), then the burner 5 tangent circle diameter is measured by the Pitot tube body 3 (the tangent circle diameter value is preliminarily estimated, and the half of the value is used to control the stepping motor 10 to act, so that the telescopic shaft 11 is extended, the Pitot tube body 3 and the differential pressure sensor connected thereto and the data processing, storage and control unit 8 are used to measure the burner nozzle wind speed in real time by acquiring the differential pressure, and the Pitot tube swing controller 12 is swung back and forth in the horizontal plane to find the angle with the maximum differential pressure signal, the Pitot tube swing controller 12 is fixed, the telescopic shaft 11 is retracted, and the telescopic shaft 11 is uniformly extended, the differential pressure is measured in real time, the position where the maximum differential pressure signal appears is recorded, and the extension distance of the stepping motor 10 is recorded, the previous operation is repeated three times, the extension distance of the stepping motor 10 corresponding to the position where the maximum differential pressure signal appears is recorded, and the value is multiplied by 2 to obtain the installation tangent circle diameter of the burner 5, and the data is recorded on the differential pressure sensor and the data processing, storage and control unit 8); Step four, after the current burner 5 is measured, the Pitot tube body 3 is rotated to the detection area of the next burner 5 by the positioning assembly 4 (in this process, the rotation shaft 403 drives the brake ratchet 404 to rotate by starting the rotation motor 402, and since the brake ratchet 404 is engaged with the driven ratchet 409, the Pitot tube body 3 on the setting sleeve 405 is rotated to the detection area of the next burner 5), and the detection method in step three is repeated to obtain the tangent circle diameter of the next burner.

[0033] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A burner cut circle diameter measuring device comprising a boiler body (1), characterized in that, The inside of the boiler body (1) is provided with a plurality of burners (5) at equal intervals, the inside of the boiler body (1) is provided with an anti-abrasion fixing assembly (2), the anti-abrasion fixing assembly (2) is provided with a positioning assembly (4), the anti-abrasion fixing assembly (2) comprises a fixed frame (201), the fixed frame (201) is located in the inside of the boiler body (1), the inner wall of the fixed frame (201) is fixedly connected with a cross fixed plate (202), the inside of the side opening of the cross fixed plate (202) is fixedly connected with a hole sleeve (203), the inside of the hole sleeve (203) is slidably connected with a hole center rod (204), and the hole center rod (204) and the hole sleeve (203) can be fixed through bolts.

2. A burner cut diameter measuring device according to claim 1, wherein, The inner wall of the fixed frame (201) is provided with a plurality of electric telescopic rods (205) at equal intervals, the telescopic ends of the plurality of electric telescopic rods (205) are fixedly connected with a plurality of setting groove cylinders (206) penetrating through the inner wall of the fixed frame (201), and the plurality of setting groove cylinders (206) are located on the outer side of the fixed frame (201).

3. A burner cut diameter measuring device according to claim 2, wherein, The inside of the setting groove cylinder (206) is fixedly connected with a setting plate (214), the side of the setting plate (214) close to the electric telescopic rod (205) is provided with a reinforcing telescopic rod (213), the telescopic end of the reinforcing telescopic rod (213) is provided with a rubber reinforcing ball (209) penetrating through the side of the setting plate (214), and the upper end outer wall of the setting groove cylinder (206) is fixedly connected with a fixed ring (207).

4. A burner cut diameter measuring device according to claim 3, wherein The outer wall of the fixed ring (207) is provided with two notches at equal intervals, the two notches are fixedly connected with main movable shafts (212), and the outer walls of the two main movable shafts (212) are connected with main chain plates (210) through bearings.

5. The burner cut-off diameter measuring device of claim 1, wherein, The inner parts of the mutually faraway ends of the two main chain plates (210) are fixedly connected with auxiliary movable shafts (215), the outer walls of the two auxiliary movable shafts (215) are connected with auxiliary chain plate groups (208) through bearings, the two auxiliary chain plate groups (208) are formed by two corresponding auxiliary chain plates connected through bearings, the inner parts of the two main chain plates (210) and the two auxiliary chain plate groups (208) are provided with suction discs (211), and the suction ends of the plurality of suction discs (211) are close to the inner wall of the boiler body (1).

6. A burner cut diameter measuring device according to claim 5, wherein, The positioning assembly (4) comprises a movable sleeve (401), the movable sleeve (401) is slidably connected to the outer wall of the hole center rod (204), the movable sleeve (401) and the hole center rod (204) can be fixed through bolts, one end of the movable sleeve (401) is fixedly connected with a connecting plate (410), a rotating hole is formed in one side of the connecting plate (410), a rotating shaft (403) is connected to the inside of the rotating hole through a bearing, a rotating motor (402) is arranged on one side of the connecting plate (410), the driving end of the rotating motor (402) is connected to one end of the rotating shaft (403) through a shaft coupling, and the other end outer wall of the rotating shaft (403) is fixedly connected with a brake ratchet (404).

7. A burner cut diameter measuring device according to claim 6, wherein, The outer wall of the movable sleeve (401) is connected with a driven ratchet (409) through a bearing, the driven ratchet (409) is engaged with the brake ratchet (404), and the outer wall of the movable sleeve (401) is connected with a setting sleeve (405) through a bearing.

8. A burner cut diameter measuring device according to claim 7, wherein, The outer wall of the setting sleeve (405) is provided with equidistant positioning grooves away from the driven ratchet (409), a plurality of fixed rods (408) are fixedly connected in the positioning grooves, respectively, the outer walls of the plurality of fixed rods (408) are connected with positioning plates (407) through bearings, respectively, and one side of each of the plurality of positioning plates (407) is fixedly connected with a contact plate (406).

9. A burner cut diameter measuring device according to claim 8, wherein, The outer wall of the setting sleeve (405) is fixedly connected with a stepping motor (10), one end of the stepping motor (10) is provided with an extension shaft (11), one end of the extension shaft (11) is connected with a movable frame (7) through a bearing, the inside of the movable frame (7) is provided with a pitot tube body (3), one end of the pitot tube body (3) is provided with a differential pressure sensor and a data processing storage and control unit (8), the outer wall of the pitot tube body (3) is provided with a setting groove ring (6), the outer wall of the extension shaft (11) is fixedly connected with a supporting plate (9), the upper side of the supporting plate (9) is provided with a pitot tube swing controller (12), and the driving end of the pitot tube swing controller (12) is connected with the setting groove ring (6) through a bearing.

10. A method of measuring the burner cut diameter using a burner cut diameter measuring device as claimed in claim 9, characterized in that, The method comprises the following steps: Step one, when measuring the burner (5) circle diameter, the boiler primary air fan and the air blower need to be started in advance, under the condition of boiler cold ventilation, then a certain layer of burner (5) is selected in the furnace, the burners (5) are connected according to the 1# angle 3# angle and the 2# angle 4# angle with a wire, and the focus of the above two pairs of angle lines is the furnace center point; Step two, after the furnace center point is confirmed, the detection platform is quickly built through the anti-abrasion fixing assembly (2), and the center rod (204) with a hole in the detection platform is accurately fixed at the furnace center point; Step three, after the detection platform is built, the pitot tube body (3) is accurately moved to the detection area through the positioning assembly (4), and then the pitot tube body (3) is used to measure the burner (5) circle diameter; Step four, after the current burner (5) is measured, the pitot tube body (3) is rotated to the detection area of the next burner (5) through the positioning assembly (4), and the detection method in step three is repeated to obtain the next burner circle diameter.

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