Primary air leveling measuring device for pulverized coal system of power plant

Abstract

The invention provides a primary air leveling measuring device for a pulverized coal system of a power plant, which comprises a shell, a measuring pipe, a driving mechanism, a clamping mechanism and a wind powder preventing mechanism, the measuring pipe penetrates through two ends of the shell, the top end of the measuring pipe is detachably connected with a measuring head, and the measuring pipe is connected with a micromanometer; the driving mechanism is connected with and drives the measuring pipe to stretch out and draw back relative to the shell in the horizontal direction, the operation panel is connected with and controls the driving mechanism through the controller, and then the measuring pipe is driven to stretch into different positions in the powder pipe for sampling; the clamping mechanism is connected to the top end of the shell, and the wind powder preventing mechanism is connected between the measuring pipe and the shell and covers a gap between the measuring pipe and the shell. According to the invention, the measurement process can be automatically completed, the personnel operation is reduced, the test efficiency and the measurement accuracy are improved, the measurement error is reduced, the severe environment problems of high working environment temperature and dust overflow caused by outward direct blowing of pulverized coal in the traditional primary air hot-state test can be solved, the environment is not polluted, and the test efficiency is improved. And the safety of the personnel in the measurement process is also ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind speed leveling measurement, and particularly relates to a primary air leveling measurement device for a coal powder system of a power plant. BACKGROUND

[0002] A coal-fired power plant often needs to carry out primary air leveling work when it is started for the first time, overhauled, started after minor repair, and the coal type changes. In addition, with the influence of the current coal supply and market in China, the coal type of the power plant often faces rapid changes. The change of the coal type mixed by the boiler of the power plant will cause problems such as a decrease in boiler efficiency, ash deposition, and coking. The primary air leveling experiment of the boiler combustion system can better solve the corresponding problems, and it is of great significance to the stability and parameter adjustment of the operation of the boiler unit.

[0003] For the primary air leveling experiment, in the process of data acquisition, the commonly used test method is the equal cross-section test method, which requires the experimenters to hold the backrest tube, the pitot tube, and the micro-pressure gauge. Under the condition that the test door of the coal powder tube is fully opened under the positive pressure direct blowing, the experimenters test the primary air pipes of the multiple coal mills of the boiler unit in turn, and multiple long-time data measurement is required for each pipe.

[0004] However, in the actual measurement process, there are many defects and deficiencies in the prior art:

[0005] 1. The prior art has no mature device to replace, and the operation is complicated: the existing measurement method is mainly completed by the test personnel holding the experimental equipment. The experimental steps are simple, but the degree of repetition is high. The existing mechanical processing technology can meet the automatic measurement, and the measurement method has a high degree of replaceability.

[0006] 2. The existing test method has the problems of harsh working environment and long test time: since the primary air pipe is used to transport coal powder under positive pressure direct blowing during hot state adjustment, the test personnel need to fully open the sampling door in the face of the harsh environment of direct blowing of dust and high temperature. Since a boiler unit is often equipped with 5 coal mills, about 20 powder pipes, and each powder pipe needs to be tested at 8-10 points, the adjustable orifice needs to be operated for primary air leveling, and the change of the orifice opening of a single powder pipe will affect the test results of other powder pipes. Therefore, multiple repeated measurements are required, and the test personnel face the problems of long test time and high physical requirements.

[0007] 3. The data value of the existing test method is not accurate: since the test instrument needs to be manually held and operated, and the test equipment is not fixed and the on-site measurement conditions are not good, the measurement device cannot obtain accurate values due to personnel operation, and there is a large measurement error. SUMMARY

[0008] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides a primary air leveling measurement device for a coal powder system of a power plant, which realizes automatic measurement, simplifies operation, improves the accuracy and efficiency of measurement, avoids environmental pollution caused by wind powder overflow, and avoids harm to the body caused by inhaling wind powder when personnel measure.

[0009] The present application provides a primary air leveling measurement device for a coal powder system of a power plant, which includes a shell, a measuring pipe, a driving mechanism, a clamping mechanism, and a wind powder prevention mechanism. The shell is cylindrical and arranged in a horizontal direction. An operating panel is connected to the outside of the shell. The measuring pipe penetrates both ends of the shell in the horizontal direction. The measuring pipe has a top end and a tail end in the horizontal direction. The top end of the measuring pipe is detachably connected to a measuring head. The measuring head is provided with an air inlet. The tail end of the measuring pipe is connected to a micro-pressure gauge through a hose. The driving mechanism is connected to and drives the measuring pipe to extend and retract relative to the shell in the horizontal direction. The operating panel is connected to and controls the driving mechanism through a controller, thereby driving the measuring pipe to extend into different positions in the powder pipe for sampling. The clamping mechanism is connected to the top end of the shell and is adapted to be detachably connected to a sampling port of the powder pipe. The wind powder prevention mechanism is connected between the measuring pipe and the shell and covers the gap between them. When the clamping mechanism is clamped to the sampling port and the measuring pipe extends into the sampling port, the wind powder prevention mechanism is attached to the outer end face of the sampling port to block the wind powder in the powder pipe from spreading outward through the sampling port.

[0010] In some embodiments, the wind powder prevention mechanism is a sealing film with a folding allowance. The outer periphery of the sealing film is fixedly connected to the clamping mechanism. The inner periphery of the sealing film is tightly attached to the outer wall of the measuring pipe.

[0011] In some embodiments, the clamping mechanism includes four hydraulic cylinders uniformly distributed on the inner wall of the front end of the shell. The cylinder body of the hydraulic cylinder is fixedly connected to the inner wall of the shell. The telescopic rod of the hydraulic cylinder extends and retracts towards the axial direction of the measuring pipe. The end of the telescopic rod is fixedly connected to a rubber pad.

[0012] In some embodiments, the measuring pipe is fixedly connected to a sliding support mechanism. The sliding support mechanism is in sliding fit with the inner wall of the shell. The output end of the driving mechanism is fixedly connected to the sliding support mechanism. The driving mechanism drives the sliding support mechanism and the measuring pipe to move synchronously in the horizontal direction.

[0013] In some embodiments, the primary air leveling measurement device for the coal powder system of the power plant further includes an auxiliary sealing mechanism. The auxiliary sealing mechanism includes an auxiliary sealing film and a mounting ring. The auxiliary sealing film is fixedly connected between the mounting ring and the measuring pipe. The outer periphery of the mounting ring is attached to the inner wall of the shell and is in sliding fit. The auxiliary sealing mechanism moves synchronously with the measuring pipe.

[0014] In some embodiments, the outer part of the shell is provided with a scale in horizontal direction, the shell is transparent at the position provided with the scale, a pointer is arranged on the sliding support mechanism, the pointer is arranged in a direction perpendicular to the scale and points to the scale mark of the scale to determine the position of the measuring head.

[0015] In some embodiments, the measuring head and the measuring tube are connected through threads.

[0016] In some embodiments, the axis of the measuring tube is collinear with the axis of the shell, the driving mechanism is a hydraulic driving mechanism, and two hydraulic driving mechanisms are arranged on the inner wall of the shell and located at opposite sides of the measuring tube.

[0017] In some embodiments, the body of the hydraulic driving mechanism is radially connected to the inner wall of the shell, the inner wall of the shell is connected with an annular dovetail slide, the bottom of the body is fixedly connected with a dovetail sliding block, the dovetail sliding block is in sliding fit with the dovetail slide, the tail of the body is fixedly connected with an indicating rod in horizontal direction, the indicating rod extends out of the tail end of the shell, four buckles are evenly connected on the annular end face of the tail end of the shell, two opposite buckles are located at the upper and lower ends of the shell, and the other two opposite buckles are located at the left and right ends of the shell, the buckles are detachably connected with the indicating rod, so that the two hydraulic driving mechanisms are arranged in vertical state or horizontal state.

[0018] In some embodiments, the bottom of the shell is supported by an auxiliary support. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which:

[0020] Wherein:

[0021] Figure 1 FIG. 1 is a structural schematic view of a primary air leveling measurement device for a coal powder system of a power plant in the embodiment of the present application;

[0022] Figure 2 FIG. 2 is a left view of the clamping mechanism arranged at the top end of the shell in FIG. 1; Figure 1

[0023] Figure 3 FIG. 3 is a right view of the hydraulic driving mechanism arranged in the shell in FIG. 1; Figure 1

[0024] Reference Signs:

[0025] ​​1, measuring head; 2, clamping mechanism; 3, mounting ring; 4, auxiliary sealing film; 5, measuring pipe; 6, sliding support mechanism; 7, operation panel; 8, sealing film; 9, shell; 10, dovetail slide; 11, dovetail slider; 12, hydraulic drive mechanism; 13, indicating rod; 14, micro pressure gauge; 15, hose; 16, electric switch valve; 17, rubber pad. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0027] The measuring device for primary air leveling measurement of a coal powder system of a power plant is described below with reference to the drawings.

[0028] As shown in the drawings, Figures 1-3 The measuring device for primary air leveling measurement of a coal powder system of a power plant is described below with reference to the drawings.

[0029] The embodiments of the present application can automatically complete the measurement process by setting the operation panel 7, the controller and other automatic operation systems, which can reduce personnel operation and improve test efficiency.

[0030] The embodiments of the present application can ensure that the device remains stable during the measurement process by setting the clamping mechanism 2.

[0031] The embodiments of the present application can improve the accuracy of measurement and reduce measurement errors caused by non-standard personnel operation by connecting the measuring pipe 5 with the drive mechanism and automatically moving the measuring pipe 5 to different positions in the powder pipe for sampling and measurement through the drive mechanism.

[0032] The embodiment of the present invention solves the harsh environment problems of high working environment temperature and dust overflow caused by direct outward blowing of coal powder in traditional single-stage hot-wind tests by providing a wind-powder protection mechanism. It does not pollute the environment and ensures the safety of personnel during the measurement process.

[0033] The solution of the embodiment of the present invention is reasonable, simple in structure, easy to implement and highly practical.

[0034] Furthermore, the probe 1 is detachable, and probes 1 of different precision can be replaced according to experimental requirements, such as bevel hole probes, round hole probes, etc.

[0035] Furthermore, the operation panel 7 is provided with a liquid crystal display and various operation buttons (such as a confirmation and return function button and a numerical direction selection button) to realize command input, command output and electric control. The operation panel 7 controls the measurement tube 5 to move between multiple measurement points in the powder hose and take samples.

[0036] Furthermore, the data transmission port of the micromanometer 14 is electrically connected to the operation panel 7 through a data transmission line for data transmission. The operation panel 7 and the micromanometer 14 both have a data interface, which can be plugged and unplugged with the data transmission line, and can be connected to a variety of micromanometers 14 through the data transmission line. It can synchronize data and make real-time decisions on the actions of each electric actuator to automatically execute the measurement process. The micromanometer 14 is an instrument that needs to perform data analysis during a wind test, and generally uses a commercial product. A dual-purpose interface for charging and data transmission functions is commonly found on the micromanometer 14. By developing the operation panel 7 and using the data transmission line to read the data of the micromanometer 14, the relevant functions of data transmission are realized.

[0037] Furthermore, the interior of the measuring tube 5 is provided with two sampling spaces, and the measuring head 1 has two oppositely positioned air inlets, corresponding to the two sampling spaces. The tail end of the measuring tube 5 is connected to two corresponding hoses 15, each of which is connected to a micromanometer 14. During use, the two air inlets of the measuring head 1 are aligned with the windward and leeward directions of the powder hose, respectively. The hose 15 connecting the windward air inlet is connected to an electric reversing valve, which is connected to the interface of the micromanometer 14. The electric reversing valve has two air inlets and one air outlet, which is connected to the micromanometer 14. One air inlet is connected to the hose 15, and the other air inlet is connected to the outside air. When measuring total pressure, the air inlet of the electric reversing valve is connected to the hose 15. When measuring static pressure, the measuring tube 5 is rotated 90 degrees, so that the two air inlets of the measuring head 1 are facing the inner wall of the powder hose, and the air inlet of the electric reversing valve is switched to connect to the outside air. The electric reversing valve is connected to the operation panel 7 via a controller.

[0038] Furthermore, the hose 15 is made of silicone.

[0039] In some embodiments, asFigure 1 As shown, the windproof powder mechanism is a sealing film 8 with a folding allowance, the outer periphery of the sealing film 8 is fixedly connected to the clamping mechanism 2, and the inner periphery of the sealing film 8 is tightly connected to the outer wall of the measuring pipe 5.

[0040] Further, the sealing film 8 is a flexible film and has a certain toughness and anti-tearing function, such as TPU, polyvinyl chloride material, etc.

[0041] In some alternative embodiments, the sealing film 8 can be replaced by a sponge sheet, a rubber sheet, a silica gel sheet, etc., as long as it can block the wind powder from spreading outwards during the measurement.

[0042] Further, the sealing film 8 is fixed on the measuring pipe 5 and the clamping mechanism 2 by a conventional detachable connection method such as a buckle or a clamp. The sealing film 8 can be quickly replaced.

[0043] In some embodiments, as shown, Figure 2 The clamping mechanism 2 includes four hydraulic cylinders uniformly distributed on the inner wall of the front end of the shell 9. The cylinder body of the hydraulic cylinder is fixedly connected to the inner wall of the shell 9, the telescopic rod of the hydraulic cylinder is telescopic towards the axial direction of the measuring pipe 5, and the end of the telescopic rod is fixedly connected to the rubber pad 17.

[0044] It should be noted that the sampling port usually extends outward by a certain length of pipe, and the end of the pipe is detachably connected to the cover plate. When sampling is needed, the cover plate can be removed. The clamping mechanism 2 clamps the pipe outside the sampling port.

[0045] Further, the hydraulic cylinder is connected to the operation panel 7 through the controller, and the telescopic rod of the hydraulic cylinder is controlled through the operation panel 7 to realize automatic clamping of the sampling port.

[0046] Further, the sealing film 8 is connected between the rubber pad 17 and the measuring pipe 5.

[0047] In some embodiments, as shown, Figure 1 The measuring pipe 5 is fixedly connected to the sliding support mechanism 6, the sliding support mechanism 6 is in sliding fit with the inner wall of the shell 9, the output end of the driving mechanism is fixedly connected to the sliding support mechanism 6, and the driving mechanism drives the sliding support mechanism 6 and the measuring pipe 5 to move synchronously in the horizontal direction.

[0048] By arranging the sliding support mechanism 6, the measuring pipe 5 and the primary air flow in the powder pipe always remain perpendicular. The manual measurement method can be replaced, and the measurement error can be reduced.

[0049] Further, the sliding support mechanism 6 is an annular slide, which has a certain thickness and is arranged at the middle position of the measuring pipe 5, and can support the measuring pipe 5 to ensure that the measuring pipe 5 remains horizontal, preventing the measuring pipe 5 from tilting due to the impact of the air flow in the powder pipe during sampling and measurement, and thus causing inaccurate measurement data.

[0050] Further, multiple annular sliders can be arranged in the horizontal direction to further ensure that the measuring tube 5 remains horizontal.

[0051] In some embodiments, as shown in Figure 1 the primary air leveling measurement device for the coal powder system of the power plant further comprises an auxiliary sealing mechanism, the auxiliary sealing mechanism comprises an auxiliary sealing film 4 and a mounting ring 3, the auxiliary sealing film 4 is fixedly connected between the mounting ring 3 and the measuring tube 5, the outer periphery of the mounting ring 3 is fitted to the inner wall of the shell 9 and is in sliding fit, and the auxiliary sealing mechanism moves synchronously with the measuring tube 5. The auxiliary sealing mechanism is arranged at the rear end of the wind powder prevention mechanism.

[0052] By arranging the auxiliary sealing mechanism, the isolation ability of the wind powder can be further improved.

[0053] In some embodiments, the outside of the shell 9 is marked with a scale in the horizontal direction, the position of the shell 9 marked with the scale is of transparent material, a pointer is marked on the sliding support mechanism 6, the pointer is arranged in a direction perpendicular to the scale and points to the scale mark of the scale to determine the position of the measuring head 1. In the case of program execution error, the position of the measuring point output by the operation panel 7 can be compared and manually measured. When the controller fails, manual measurement is performed.

[0054] In some embodiments, the measuring head 1 and the measuring tube 5 are connected by threads. The measuring head 1 and the measuring tube 5 can be quickly disassembled and assembled.

[0055] In some embodiments, as shown in Figure 1 , 3 the axis of the measuring tube 5 is collinear with the axis of the shell 9, the driving mechanism is a hydraulic driving mechanism 12, and two hydraulic driving mechanisms 12 are arranged on the inner wall of the shell 9 and located at opposite sides of the measuring tube 5. The force on the measuring tube 5 is uniform, and the translation process of the measuring tube 5 is more stable.

[0056] In some embodiments, as shown in Figure 1 , 3 the body of the hydraulic driving mechanism 12 is radially connected to the inner wall of the shell 9, the inner wall of the shell 9 is connected with an annular dovetail slide 10, the bottom of the body is fixedly connected with a dovetail sliding block 11, the dovetail sliding block 11 is in sliding fit with the dovetail slide 10, the tail of the body is fixedly connected with an indicating rod 13 in the horizontal direction, the indicating rod 13 extends out of the tail end of the shell 9, four buckles are evenly connected on the annular end face of the tail end of the shell 9, two opposite buckles are located at the upper and lower ends of the shell 9, and the other two opposite buckles are located at the left and right ends of the shell 9. The buckles are detachably connected with the indicating rod 13, so that the two hydraulic driving mechanisms 12 are arranged in a vertical state or a horizontal state.

[0057] By connecting the hydraulic drive mechanism 12 to the annular dovetail slide 10, the hydraulic drive mechanism 12 can slide along the dovetail slide 10, facilitating a 90-degree rotation of the measuring tube 5 to measure static pressure. The provision of an indicator rod 13 and a clip allows for more precise positioning of the measuring rod, reducing measurement errors. For example, if the wind direction in the powder hose is vertical, when measuring total pressure, the two indicator rods 13 are snapped into place with the upper and lower clips to ensure that the two air inlets of the probe 1 are located at the upper and lower positions, respectively. When measuring static pressure, the upper and lower clips are released, and the two indicator rods 13 are rotated to the left and right clip positions and snapped in place, thereby precisely rotating the measuring tube 5 90 degrees.

[0058] It should be noted that the position of the operating panel 7 blocks the hydraulic drive mechanism 12 above. Figure 1 Only one hydraulic drive mechanism 12 is shown in the figure. In fact, a hydraulic drive mechanism 12 is provided above and below the housing. Figure 3 It can be seen in.

[0059] In some embodiments, the bottom of the housing 9 is supported by an auxiliary bracket for supporting the measuring device so that the measuring device remains stable during sampling and measurement.

[0060] Furthermore, the auxiliary bracket has a lifting and adjusting function to adapt to sampling ports of different heights.

[0061] The working process of the primary air leveling measurement device for a power plant pulverized coal system according to an embodiment of the present invention is as follows:

[0062] According to the measurement needs, a suitable probe 1 is selected and installed on the measuring tube 5. When measuring the total pressure, the electric reversing valve is switched so that the hose 15 connected to the windward air inlet is connected to the electric reversing valve, the sampling port of the powder hose is aligned, and the operation panel 7 is manipulated to control the clamping mechanism 2 to clamp the sampling port. At this time, the axis of the measuring tube 5 is perpendicular to the direction of the powder feeding airflow. The operation panel 7 is manipulated, and the program is set by the personnel and automatically executed. The telescopic distance of the telescopic rod of the hydraulic drive mechanism 12 is set by the program. The hydraulic drive mechanism 12 drives the sliding support mechanism 6 and the measuring tube 5 to move horizontally toward the sampling port, so that the probe 1 moves to the set measuring point for measurement. When the probe 1 extends into the powder hose, the sealing film 8 is attached to the sampling port to prevent the wind powder from spreading outward. The wind speed, wind pressure and other measurement data of the micromanometer 14 can be read on the operation panel 7. After the data stabilizes, an instruction is issued to control the measuring tube 5 to continue moving, and the subsequent point position measurement is performed, and finally the equal ring section method measurement is completed.

[0063] When the static pressure of the powder pipe needs to be measured, the buckle connecting the two indicating rods 13 is loosened, the two indicating rods 13 are rotated to the other two opposite buckles and fixed, at this time the measuring pipe 5 has been rotated by 90 degrees, and the two air inlets of the measuring head 1 are directed towards the inner wall of the powder pipe. At the same time, the electric switch valve 16 is switched, so that the air inlet of the electric switch valve 16 is in communication with the outside air. Then the static pressure measurement of the set point is carried out. Usually, the static pressure measurement is carried out after the total pressure measurement of each sampling port.

[0064] After the measurement of a single powder pipe is completed, the measuring pipe 5 is withdrawn from the sampling port, the clamping mechanism 2 is loosened, and the measurement of the next powder pipe is carried out.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0066] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0067] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0069] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers for different elements, regions, layers, or sections, and are not intended to denote a spatial or chronological priority or order except if explicitly so defined. Also, the terms "comprises", "comprising", "includes", "including", or the like are used herein to generally mean comprising, including, or consisting of, unless otherwise indicated.

[0070] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present application, and that changes, modifications, substitutions and variations can be made therein by those skilled in the art without departing from the scope of the present application.

Claims

1. A primary air leveling measurement device for a pulverized coal system in a power plant, characterized in that: include: A housing is cylindrical and arranged in a horizontal direction, and an operation panel is connected to the outside of the housing; A measuring tube, the measuring tube passing through both ends of the housing in a horizontal direction, the measuring tube having a top end and a tail end in a horizontal direction, the top end of the measuring tube being detachably connected to a measuring head, the measuring head being provided with an air inlet, and the tail end of the measuring tube being connected to a micromanometer via a hose; a driving mechanism, the driving mechanism being connected to and driving the measuring tube to extend and retract horizontally relative to the housing, the operating panel being connected to and controlling the driving mechanism via a controller, thereby driving the measuring tube to extend into different positions in the powder hose for sampling; a clamping mechanism connected to the top end of the housing, the clamping mechanism being adapted to be detachably connected to the sampling port of the powder hose; The wind and powder prevention mechanism is connected between the measuring tube and the outer shell and covers the gap between the measuring tube and the outer shell. When the clamping mechanism is clamped on the sampling port and the measuring tube is extended into the sampling port, the wind and powder prevention mechanism fits the outer end surface of the sampling port to prevent the wind and powder in the powder tube from dispersing outward through the sampling port.

2. The primary air leveling measurement device for a pulverized coal system in a power plant according to claim 1, characterized in that: The windproof powder mechanism is a sealing film with a folding margin, the outer periphery of the sealing film is fixedly connected to the clamping mechanism, and the inner periphery of the sealing film is tightly connected to the outer wall of the measuring tube.

3. The primary air leveling measurement device for a pulverized coal system in a power plant according to claim 2, characterized in that: The clamping mechanism includes four hydraulic cylinders evenly distributed on the front inner wall of the shell, the cylinder body of the hydraulic cylinder is fixedly connected to the inner wall of the shell, the telescopic rod of the hydraulic cylinder is telescopic toward the axial direction of the measuring tube, and the end of the telescopic rod is fixedly connected to the rubber pad.

4. The primary air leveling measurement device for a pulverized coal system in a power plant according to claim 1, characterized in that: The measuring tube is fixedly connected to a sliding support mechanism, the sliding support mechanism is slidably matched with the inner wall of the shell, the output end of the driving mechanism is fixedly connected to the sliding support mechanism, and the driving mechanism drives the sliding support mechanism and the measuring tube to move synchronously in the horizontal direction.

5. The primary air leveling measurement device for a power plant pulverized coal system according to claim 1, characterized in that: It also includes an auxiliary sealing mechanism, which includes an auxiliary sealing membrane and a mounting ring. The auxiliary sealing membrane is tightly and fixedly connected between the mounting ring and the measuring tube. The outer periphery of the mounting ring fits the inner wall of the shell and slides together. The auxiliary sealing mechanism moves synchronously with the measuring tube.

6. The primary air leveling measurement device for a pulverized coal system in a power plant according to claim 4, characterized in that: The outside of the shell is horizontally marked with a scale, and the shell is made of transparent material at the position where the scale is marked. A pointer is engraved on the sliding support mechanism, and the pointer is set in a direction perpendicular to the scale and points to the scale of the scale to determine the position of the probe.

7. The primary air leveling measurement device for a power plant pulverized coal system according to claim 1, characterized in that: The measuring head is connected to the measuring tube via threads.

8. The primary air leveling measurement device for a power plant pulverized coal system according to claim 1, characterized in that: The axis of the measuring tube is collinear with the axis of the shell. The driving mechanism is a hydraulic driving mechanism. Two hydraulic driving mechanisms are provided, which are respectively connected to the inner wall of the shell and located on opposite sides of the measuring tube.

9. The primary air leveling measurement device for a pulverized coal system in a power plant according to claim 8, characterized in that: The body of the hydraulic drive mechanism is radially connected to the inner wall of the shell, the inner wall of the shell is connected with an annular dovetail slide, the bottom of the fuselage is fixedly connected with the dovetail slider, the dovetail slider slides with the dovetail slide, the tail of the fuselage is fixedly connected with an indicator rod in the horizontal direction, the indicator rod extends out of the tail end of the shell, and four clips are evenly connected to the annular end surface of the tail end of the shell, two of which are opposite to each other and are located at the upper and lower ends of the shell, and the other two are opposite to each other and are located at the left and right ends of the shell. The clips are detachably connected to the indicator rod so that the two hydraulic drive mechanisms are arranged in a vertical state or a horizontal state.

10. The primary air leveling measurement device for a pulverized coal system in a power plant according to claim 1, characterized in that: The bottom of the housing is supported by an auxiliary bracket.

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