Material level gauge for pulverized coal bunker

Abstract

The invention relates to a material level meter for a pulverized coal bunker. The material level meter comprises a winding and unwinding assembly, a measuring assembly, a pressing wheel assembly, a detecting assembly and a controller. The winding and unwinding set comprises a winding roll rotating around the axis of the winding roll in a pivot mode, the measuring assembly comprises a cable wound around the winding roll and a balance weight part connected to the free end of the cable and arranged in the pulverized coal bunker, and the balance weight part is used for driving the free end of the cable to move downwards in the pulverized coal bunker in the vertical direction. The pressing wheel assembly comprises a first roller and a second roller which are clamped on the cable, and the cable drives the first roller and the second roller to rotate around the axes of the first roller and the second roller. The detection assembly can detect the number of turns of rotation of the first roller and the second roller. The controller is in communication connection with the detection assembly and can obtain the material level height of the pulverized coal layer according to the number of turns, detected by the detection assembly, of rotation of the first roller and the second roller. Wherein the winding and unwinding assembly, the pressing wheel assembly, the detection assembly and the controller are all arranged outside the coal bunker and are not affected by high temperature and high-content dust, and the material level height of a pulverized coal layer can be accurately measured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal powder bin level measurement, and in particular, to a coal powder bin level meter. Background Art

[0002] In the huge system of power production, the pulverized coal warehouse is an indispensable part of the coal-fired power plant, and its stable and accurate inventory management is directly related to the operational efficiency and production stability of the power plant. In order to be able to grasp the material level of the pulverized coal in the pulverized coal bin, it is necessary to use a level meter to detect the material level of the pulverized coal in the pulverized coal bin. In related technologies, workers usually use digital level meters based on radar or laser, but this type of digital level meter needs to be inserted into the pulverized coal bin when detecting the pulverized coal bin. Due to the high temperature inside the pulverized coal bin and the high dust content, the digital level meter usually cannot work stably in the pulverized coal bin for a long time, and the high dust content in the pulverized coal bin also makes the detection of this type of digital level meter not accurate enough. Summary of the invention

[0003] The purpose of the present invention is to provide a material level meter for a coal powder bin, which can measure the material level of the coal powder layer accurately without being affected by the high temperature and high dust content in the coal powder bin when measuring the material level of the coal powder layer.

[0004] In order to achieve the above object, the present disclosure provides a material level meter for a pulverized coal bin, which is arranged in the pulverized coal bin and located above the pulverized coal layer. The material level meter for the pulverized coal bin comprises: A wire winding and unwinding assembly includes a wire winding reel pivotally rotating about its own axis; A measuring assembly, comprising a cable wound around the cable reel and a counterweight connected to a free end of the cable, wherein the counterweight is disposed in the coal powder bin and is used to drive the free end of the cable to move downward in a vertical direction in the coal powder bin; A pressure wheel assembly, comprising a first roller and a second roller clamped on the cable, wherein the cable drives the first roller and the second roller to rotate around their own axes; a detection component, used for detecting the number of rotations of the first roller and the second roller; and a controller, which is in communication with the detection component and is used to obtain a material level height of the coal powder layer according to the number of revolutions of the first roller and the second roller and the unfolded length of the cable detected by the detection component; Wherein, the winding and unwinding wire assembly, the pressure wheel assembly, the detection assembly and the controller are all arranged outside the coal powder bin.

[0005] Optionally, the coal powder bin level meter also includes an outer shell of the coal powder bin, the winding and unwinding assembly, the detection assembly and the pressure wheel assembly are arranged in the shell, the winding and unwinding assembly also includes a winding shaft rotatably connected to the shell, and the winding drum is fixedly sleeved on the winding shaft. The coal powder bin level meter also includes a driving assembly, and the driving assembly includes a driving motor, and the driving motor is connected to one end of the winding shaft through the clutch to drive the winding shaft and the winding drum to rotate.

[0006] Optionally, the coal powder bin level meter also includes a protective cover arranged on the shell and a damping assembly arranged in the protective cover, the end of the winding shaft away from the driving motor extends into the protective cover, the damping assembly includes an elastic baffle arranged on the protective cover and a gear connected to the end of the winding shaft away from the driving motor, the free end of the elastic baffle extends into the tooth groove of the gear to provide resistance when the gear rotates.

[0007] Optionally, the pulverized coal bin level meter further comprises a dynamic torque sensor communicatively connected to the controller, wherein the dynamic torque sensor is disposed in the housing and is used to detect the torque of the winding shaft.

[0008] Optionally, the pulverized coal bin level meter further comprises a shell arranged outside the pulverized coal bin and a first support assembly and a second support assembly arranged inside the shell, the first support assembly comprises a first bracket and a first rotating shaft, the first bracket is connected to the shell, the first rotating shaft is rotatably connected to the first bracket, the first roller is fixedly sleeved on the first rotating shaft, and the first roller can pivot around the axis of the first rotating shaft; and The second supporting assembly includes a second bracket and a second rotating shaft, the second bracket is connected to the shell, the second rotating shaft is rotatably connected to the second bracket, the second roller is fixedly sleeved on the second rotating shaft, and the second roller can pivot around the axis of the second rotating shaft.

[0009] Optionally, the detection component includes a first Hall sensor and a second Hall sensor, the first Hall sensor is used to detect the number of rotations of the first rotating shaft, and the second Hall sensor is used to detect the number of rotations of the second rotating shaft.

[0010] Optionally, the first bracket includes a sleeve fixedly connected to the shell, a connecting rod movably inserted in the sleeve, and a spring connected to the connecting rod and the side wall of the shell, and the first rotating shaft is rotatably connected to one end of the connecting rod away from the spring.

[0011] Optionally, the shell has an outlet, the free end of the cable passes through the outlet, an annular cover is provided at the outlet outside the shell, an annular brush is provided inside the annular cover, the free end of the cable passes through the annular brush and is connected to the counterweight, and the annular brush is used to clean the surface of the cable.

[0012] Optionally, the counterweight includes an outer shell and a cylindrical channel arranged in the outer shell, one end of the cylindrical channel is connected to the outside of the outer shell through a first through hole arranged on the outer shell, and the other end of the cylindrical channel is connected to the outside of the outer shell through a second through hole arranged on the outer shell, and the two ends of the cylindrical channel are respectively provided with a first dustproof net covering the first through hole and a second dustproof net covering the second through hole, and the cylindrical channel is provided with an oxygen concentration sensor, a carbon monoxide sensor, a temperature sensor and an induced draft fan, and the induced draft fan is used to suck the gas outside the outer shell into the cylindrical channel.

[0013] Optionally, a first electric telescopic rod and a second electric telescopic rod are provided in the cylindrical channel, and a driving end of the first electric telescopic rod moves in a direction toward or away from the first through hole to pass through the first dustproof net and insert into or move away from the first through hole, and a driving end of the second electric telescopic rod moves in a direction toward or away from the second through hole to pass through the second dustproof net and insert into or move away from the second through hole.

[0014] Through the above technical solution, the winding and unwinding assembly in the material level meter for coal powder bin includes a winding drum pivotally rotating around its own axis, and the measuring assembly includes a cable and a counterweight. The cable is wound on the winding drum, and the free end of the cable is connected to the counterweight. The counterweight is arranged in the coal powder bin, and is used to drive the free end of the cable to move downward in the coal powder bin in a vertical direction, and the counterweight stops moving when it moves to the coal powder layer. When the cable moves, it drives the first roller and the second roller of the pressure wheel assembly to rotate around its own axis. The detection assembly is used to detect the number of rotations of the first roller and the second roller. The controller is connected to the detection assembly in communication, and is used to obtain the material level height of the coal powder layer according to the number of rotations of the first roller and the second roller detected by the detection assembly. Among them, the winding and unwinding assembly, the pressure wheel assembly, the detection assembly and the controller are all arranged outside the coal bin. The above-mentioned coal powder bin level meter only has the counterweight and the cable extending into the coal powder bin, and the winding and unwinding wire assembly, the pressure wheel assembly, the detection assembly and the controller are all arranged outside the coal powder bin. It is not affected by the high temperature and high dust content in the coal powder bin, and can accurately measure the material level height of the coal powder layer in the coal powder bin.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic diagram of a use state of a pulverized coal bin material level meter provided in an exemplary embodiment of the present disclosure when measuring the material level of a pulverized coal layer in the pulverized coal bin; Figure 2 is a schematic structural diagram of a level meter for a pulverized coal bin provided in an exemplary embodiment of the present disclosure; Figure 3 is a cross-sectional view of a main view of a level meter for a pulverized coal silo provided in another exemplary embodiment of the present disclosure; Figure 4 This disclosure provides Figure 3 A partial enlarged schematic diagram of position A in the middle; Figure 5 is a schematic side view provided in an exemplary embodiment of the present disclosure, wherein a damping assembly within a protective cover is shown; Figure 6 is a schematic diagram of the structure inside the counterweight provided in an exemplary embodiment of the present disclosure; wherein the figure shows various devices arranged inside the counterweight; Figure 7 is a schematic cross-sectional view of a cable provided in an exemplary embodiment of the present disclosure.

[0017] Description of Reference Numerals 10-housing; 11-first housing; 12-cylindrical portion; 13-second housing; 20-winding and unwinding assembly; 21-winding reel; 22-winding shaft; 30-measuring assembly; 31-cable; 311-steel wire armor braided mesh; 312-glass fiber fire-resistant layer; 313-fire-resistant filler layer; 314-core wire one; 315-load-bearing rope; 316-core wire two; 32-counterweight; 321-columnar channel; 322-first through hole; 323-second through hole; 324-housing; 40-driving assembly; 400-driving motor; 50-detection assembly; 51-first Hall sensor; 52-second Hall sensor; 60-first supporting assembly; 61-first rotating shaft; 62-first bracket; 621-connecting rod; 622- Spring; 623-sleeve; 70-second support assembly; 71-second rotating shaft; 72-second bracket; 80-damping assembly; 81-gear; 82-elastic baffle; 90-pressure wheel assembly; 91-first roller; 92-second roller; 100-annular brush; 200-fixed pulley; 300-clutch; 500-protective cover; 501-observation window; 600-first dustproof net; 700-second dustproof net; 800-induced draft fan; 900-oxygen concentration sensor; 1000-temperature sensor; 2000-carbon monoxide sensor; 3000-first electric telescopic rod; 4000-second electric telescopic rod; 5000-dynamic torque sensor; 6000-annular cover; 7000-coal powder bin; 8000-coal powder layer. DETAILED DESCRIPTION

[0018] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0019] In the present disclosure, an X-direction is set for a level meter for a coal powder bin, wherein the X-direction is a vertical direction, the direction indicated by the arrow of the X-direction is upward, and the opposite direction is downward. In the absence of any contrary description, the directional words used, such as "inside" and "outside", refer to the inside and outside relative to the outline of the component or structure itself. In addition, it should be noted that the terms used, such as "first" and "second", etc., are used to distinguish one element from another, and do not have order and importance. In addition, in the description of the reference drawings, the same mark in different drawings represents the same element.

[0020] like Figures 1 to 7As shown, the present disclosure provides a material level meter for a coal powder bin, which includes a winding and unwinding wire assembly 20, a measuring assembly 30, a pressure wheel assembly 90, a detection assembly 50 and a controller (not shown in the figure). The winding and unwinding wire assembly 20 includes a winding drum 21 pivotally rotating around its own axis, and the measuring assembly 30 includes a cable 31 wound around the winding drum 21 and a counterweight 32 connected to the free end of the cable 31, and the counterweight 32 is arranged in the coal powder bin, and the counterweight 32 is used to drive the free end of the cable 31 to move downward in the coal powder bin along the vertical direction. The pressure wheel assembly 90 includes a first roller 91 and a second roller 92 clamped on the cable 31, and the cable 31 drives the first roller 91 and the second roller 92 to rotate around its own axis. The detection assembly is used to detect the number of revolutions of the first roller 91 and the second roller 92. The controller is connected in communication with the detection assembly 50, and is used to obtain the material level height of the coal powder layer according to the number of revolutions of the first roller 91 and the second roller 92 detected by the detection assembly 50. Among them, the winding and unwinding wire assembly 20, the pressure wheel assembly 90, the detection assembly 50 and the controller are all arranged outside the coal powder bin 7000. The above-mentioned coal powder bin level meter only has the counterweight 32 and the cable 31 extending into the coal powder bin 7000. The winding and unwinding wire assembly 20, the pressure wheel assembly 90, the detection assembly 50 and the controller are all arranged outside the coal powder bin 7000, and are not affected by high temperature and high dust content, and can accurately measure the material level height of the coal powder layer in the coal powder bin.

[0021] In the above-mentioned embodiment, the controller (not shown in the figure) can be arbitrarily arranged outside the pulverized coal bin 7000, without limitation. The controller can be constructed as a single-chip microcomputer. Of course, the controller can also be constructed as other devices, which will not be described in detail here.

[0022] In addition, when the coal powder bin level meter is initially installed, the initial height of the counterweight 32 in the coal powder bin 7000 relative to the bin bottom of the coal powder bin 7000 is known. When the counterweight 32 moves to the coal powder layer 8000 in the vertical direction under the action of its own gravity, the cable 31 drives the first roller 91 and the second roller 92 to rotate around their own axes respectively. The circumference of the outermost circumference of each of the first roller 91 and the second roller 92 is known. The moving length of the cable 31 (that is, the length of the cable 31 coming out of the winding drum 21) is equal to the circumference of the outermost circumference of the first roller 91 multiplied by the number of turns of the first roller 91; or the moving length of the cable 31 (that is, the length of the cable 31 coming out of the winding drum 21) is equal to the circumference of the outermost circumference of the second roller 92 multiplied by the number of turns of the second roller 92. After the detection component 50 detects the number of rotations of the first roller 91 and the second roller 92 respectively, the detection component 50 feeds back the detected number of rotations of the first roller 91 and the second roller 92 to the controller, and the controller obtains a first value of the length of the cable 31 by multiplying the number of rotations of the first roller 91 by the circumference of the outermost circumference of the first roller 91. The controller obtains a second value of the length of the cable 31 by multiplying the number of rotations of the second roller 92 by the circumference of the outermost circumference of the second roller 92, and then averages the two values, which is the actual detected length of the cable 31. The controller then subtracts the length of the cable 31 detected by the detection component 50 from the initial height of the counterweight 32 to obtain the material level height of the coal powder layer 8000 in the coal powder bin 7000.

[0023] It should be understood that the material level meter for the coal powder bin obtains the material level height of the coal powder layer 8000 by measuring the length of the cable 31. Therefore, the winding and unwinding wire assembly 20, the pressure wheel assembly 90, the detection assembly 50 and the controller are all arranged outside the coal powder bin 7000 to complete the measurement of the material level of the coal powder layer 8000 in the coal powder bin 7000. The winding and unwinding wire assembly 20, the pressure wheel assembly 90, the detection assembly 50 and the controller are all arranged outside the coal powder bin 7000 and are not affected by high temperature and high dust content.

[0024] In some embodiments, the cable 31 can be constructed in any appropriate form according to actual needs, such as Figure 6 As shown, the cable 31 includes a steel wire armor braided mesh 311, the inner side of the steel wire armor braided mesh 311 is wrapped with a glass fiber fire-resistant layer 312, the interior of the glass fiber fire-resistant layer 312 is wrapped with a fire-resistant filler layer 313, a core wire 1 314, a load-bearing rope 315 and a core wire 2 316, and the outer surfaces of the core wire 1 314 and the core wire 2 316 are both wrapped with mica tape.

[0025] In some embodiments, the material level meter for the coal powder bin also includes a shell 10 disposed outside the coal powder bin 7000, and the winding and unwinding wire assembly 20, the detection assembly and the pressure wheel assembly 90 are disposed in the shell 10, and the winding and unwinding wire assembly 20 also includes a winding shaft 22 rotatably connected to the shell 10, and the winding drum 21 is fixedly sleeved on the winding shaft 22, and the winding drum 21 can rotate synchronously with the winding shaft 22 around the axis of the winding shaft 22.

[0026] In addition, if Figure 5 As shown, the material level meter for coal powder silo also includes a driving assembly 40, and the driving assembly 40 includes a driving motor 400, which is connected to one end of the winding shaft 22 through a clutch 300 to drive the winding shaft 22 and the winding drum 21 to rotate. The cable 31 can be reeled. When the counterweight 32 needs to move downward in the vertical direction, the clutch 300 can be disconnected, and the counterweight 32 moves downward in the vertical direction under the action of its own gravity to pull the cable 31 to unfold from the winding drum 21.

[0027] In the above-mentioned embodiment, the driving motor 400 can be installed on the housing 10 through a mounting bracket, and the end of the winding shaft 22 connected to the driving motor 400 can pass through the housing 10 and then be connected to the driving motor 400 through the clutch 300 .

[0028] In some embodiments, Figure 5 As shown, the level meter for the pulverized coal silo also includes a protective cover 500 arranged on the shell 10 and a damping assembly 80 arranged in the protective cover 500. The end of the winding shaft 22 away from the driving motor 400 extends into the protective cover 500. The damping assembly 80 includes an elastic baffle 82 arranged on the protective cover 500 and a gear 81 connected to the end of the winding shaft 22 away from the driving motor 400. The gear 81 can rotate around the pivot axis of the winding shaft 22 along with the winding shaft 22. The free end of the elastic baffle 82 extends into the tooth groove of the gear 81 to provide resistance when the gear 81 rotates.

[0029] In the above-mentioned embodiment, the damping assembly 80 is provided to provide resistance when the gear 81 rotates, so as to prevent the cable 31 from pulling the cable reel 21 and the winding shaft 22 connected to the cable reel 21 to rotate. That is, the damping assembly 80 is provided so that the cable reel 21 can rotate in the following two situations: the first situation: when the reducer is disconnected, the counterweight 32 drives the cable 31 to move downward in the vertical direction by its own gravity, and the cable 31 wound on the cable reel 21 is unfolded to drive the cable reel 21 and the winding shaft 22 connected to the cable reel 21 to rotate; the second situation: when the cable 31 is wound, that is, the reducer is closed, the driving motor 400 drives the winding shaft 22 to rotate, the winding shaft 22 drives the cable reel 21 to rotate, and the cable reel 21 winds the cable 31. By setting the damping assembly 80, the cable 31 is prevented from pulling the wire drum to rotate alone, and the cable 31 can be prevented from continuing to unfold when the counterweight 32 falls to the coal powder layer in the vertical direction, so as to improve the accuracy of measuring the material level of the coal powder layer in the coal powder bin. Among them, the protective cover 500 is also arranged outside the coal powder bin 7000.

[0030] In some specific embodiments, an observation window 501 may be provided on the protective cover 500 to facilitate observation of the operation of the winding shaft 22 and the gear 81 in the protective cover 500 .

[0031] In some embodiments, the level meter for the pulverized coal silo further includes a dynamic torque sensor 5000 that is communicatively connected to the controller. The dynamic torque sensor 5000 is disposed in the housing 10 and is used to detect the torque of the winding shaft 22 .

[0032] It should be noted that detecting the torque of the rotating shaft by the dynamic torque sensor 5000 is a conventional method of detecting the torque of the rotating shaft. Therefore, the principle of detecting the torque of the winding shaft 22 by the dynamic torque sensor 5000 will not be described in detail.

[0033] In the above-mentioned embodiment, the torque of the winding shaft 22 is detected in real time by the dynamic torque sensor 5000, which can be used to determine whether the counterweight 32 is in a suspended state or a supported state. For example, the torque of the winding shaft 22 when the counterweight 32 is in a supported state can be detected by the dynamic torque sensor 5000, which can be defined as the initial torque of the winding shaft 22. When it is necessary to feed into the coal powder bin, the winding drum 21 can be driven by the driving motor 400 to rotate, so that the counterweight 32 rises to the initial height, and then the coal powder bin 7000 is fed. When the dynamic torque sensor 5000 detects that the torque of the winding shaft 22 has become the same as the value of the initial torque of the winding shaft 22, it indicates that the coal powder layer 8000 abuts against the counterweight 32. The dynamic torque sensor 5000 transmits the torque signal to the controller, and the controller can be connected to the alarm (not shown) arranged outside the coal powder bin 7000 to communicate with the alarm to sound an alarm by controlling the alarm, and then stop feeding after the alarm is detected to prevent the bin from overflowing. In addition, the controller can be connected to a feeding mechanism for feeding, such as a coal powder hopper, so that the feeding mechanism is closed and the feeding is stopped, which will not be repeated here.

[0034] In some embodiments, the level meter for coal powder bin further includes a fixed pulley 200 rotatably connected to the housing 10, and the cable 31 wound on the winding drum 21 is wound around the fixed pulley 200, so that the free end of the cable 31 passes through the fixed pulley 200 and then passes through the opening on the housing 10 downward in the vertical direction, and then is connected to the counterweight 32. The setting of the fixed pulley 200 can be used to guide the movement of the cable 31.

[0035] In addition, if Figure 3 and Figure 4 As shown, the material level meter for coal powder bin also includes a first support assembly 60 and a second support assembly 70 arranged in the housing 10, the first support assembly 60 includes a first bracket 62 and a first rotating shaft 61, the first bracket 62 is connected to the housing 10, the first rotating shaft 61 is rotatably connected to the first bracket 62, the first roller 91 is fixedly sleeved on the first rotating shaft 61, and the first roller 91 can pivot around the axis of the first rotating shaft 61. The second support assembly 70 includes a second bracket 72 and a second rotating shaft 71, the second bracket 72 is connected to the housing 10, the second rotating shaft 71 is rotatably connected to the second bracket 72, and the second roller 92 is fixedly sleeved on the second rotating shaft 71 so that the second roller 92 can pivot around the axis of the second rotating shaft 71.

[0036] It should be noted that a bearing can be set on the first bracket 62, and the first rotating shaft 61 can be inserted into the bearing so that the first rotating shaft 61 can rotate relative to the first bracket 62. A bearing can be set on the second bracket 72, and the second rotating shaft 71 can be inserted into the bearing so that the second rotating shaft 71 can rotate relative to the second bracket 72.

[0037] In addition, when the cable 31 is unfolded or reeled, the first roller and the second roller 92 clamp the cable 31, which can reduce the shaking of the portion of the cable 31 in the housing 10, so that the cable 31 moves more smoothly.

[0038] In some embodiments, the first bracket 62 includes a sleeve 623 fixedly connected to the housing 10, a connecting rod 621 movably inserted into the sleeve 623, and a spring 622 connected to the connecting rod 621 and the side wall of the housing 10, and the first rotating shaft 61 is rotatably connected to the end of the connecting rod 621 away from the spring 622. When the cable 31 is clamped between the first roller 91 and the second roller 92, the spring 622 connected to the connecting rod 621 and the side wall of the housing 10 is in a compressed state, that is, the first roller 91 and the second roller 92 can clamp the cable 31 through the spring 622. In addition, the gap distance between the first roller 91 and the second roller 92 is variable through the provision of the spring 622, which can adapt to cables 31 of different diameters.

[0039] In some embodiments, the detection component 50 includes a first Hall sensor 51 and a second Hall sensor 52 , wherein the first Hall sensor 51 is used to detect the number of rotations of the first roller 91 , and the second Hall sensor 52 is used to detect the number of rotations of the second roller 92 .

[0040] Specifically, the first roller 91 is fixedly mounted on the first rotating shaft 61, and the number of rotations of the first rotating shaft 61 is the number of rotations of the first roller 91. The first Hall sensor 51 can be arranged on the connecting rod 621 of the first bracket 62 to detect the number of rotations of the first rotating shaft 61, thereby realizing the detection of the number of rotations of the first roller 91; the second roller 92 is fixedly mounted on the second rotating shaft 71, and the number of rotations of the second rotating shaft 71 is the number of rotations of the second roller 92. The second Hall sensor 52 can be arranged on the second bracket 72 to detect the number of rotations of the second rotating shaft 71, thereby realizing the detection of the number of rotations of the second roller 92.

[0041] It should be understood that detecting the number of rotations of the rotating shaft by using a Hall sensor is a conventional technical means and will not be described in detail here.

[0042] In some embodiments, the shell 10 has an outlet, and the free end of the cable 31 passes through the outlet. An annular cover 6000 is provided at the outlet outside the shell 10, and an annular brush 100 is provided inside the annular cover 6000. The free end of the cable 31 passes through the annular brush 100 and is connected to the counterweight 32. The annular brush 100 is used to clean the surface of the cable 31 to prevent coal powder from being brought into the shell 10 when the cable 31 is wound, thereby affecting the operation of devices such as the winding drum 21, the pressure wheel assembly 90 and the fixed pulley 200.

[0043] like Figures 1 to 5As shown, the housing 10 includes a first housing 11, a second housing 13 and a cylindrical portion 12 connected to the first housing 11 and the second housing 13. The cable reel 21, the cable reel 22 and the dynamic torque sensor 5000 are all arranged in the accommodating cavity formed by the first housing 11. The fixed pulley 200, the pressure wheel assembly 90, the first bracket 62 assembly and the detection assembly 50 can all be arranged in the accommodating cavity surrounded by the second housing 13. The outlet of the housing 10 is opened in the second housing 13. The free end of the cable 31 wound on the cable reel 21 passes through the inner cavity of the cylindrical portion 12, passes through the fixed pulley 200, the first roller 91 and the second roller 92, and the outlet of the housing 10 and the annular brush 100, and is connected to the counterweight 32. The setting of the housing 10 can protect the above-mentioned components arranged in the housing 10 to prevent coal powder from affecting the operation of each component in the housing 10.

[0044] In some embodiments, Figure 6 As shown, the counterweight 32 includes a shell 324 and a columnar passage 321 disposed in the shell 324. One end of the columnar passage 321 is connected to the outside of the shell 324 through a first through hole 322 disposed on the shell 324, that is, one end of the columnar passage 321 is connected to the coal bunker through the first through hole 322 disposed on the shell 324, and the other end of the columnar passage 321 is connected to the outside of the shell 324 through a second through hole 323 disposed on the shell 324, that is, one end of the columnar passage 321 is connected to the coal bunker through the first through hole 322 disposed on the shell 324. The first through hole 322 is connected to the coal bunker, and the two ends of the columnar channel 321 are respectively provided with a first dust-proof net 600 covering the first through hole 322 and a second dust-proof net 700 covering the second through hole 323. An oxygen concentration sensor 900, a carbon monoxide sensor 2000, a temperature sensor 1000 and an induced draft fan 800 are provided in the columnar channel 321. The induced draft fan 800 is used to suck the gas outside the shell 324 into the columnar channel 321, that is, the induced draft fan 800 sucks the gas in the coal bunker into the columnar channel 321.

[0045] In the above-mentioned embodiment, the first dust-proof net 600 and the second dust-proof net 700 can prevent coal powder from entering the column channel 321 through the first through hole 322 and the second through hole 323, and the induced draft fan 800 sucks the gas in the coal bin into the column channel 321. The oxygen concentration sensor 900 can be used to detect the oxygen concentration of the gas sucked into the column channel 321, the carbon monoxide sensor 2000 can be used to detect the carbon monoxide concentration of the gas sucked into the column channel 321, and the temperature sensor 1000 can be used to detect the temperature of the gas sucked into the column channel 321. The environmental parameters in the coal bin can be detected by the oxygen concentration sensor 900, the carbon monoxide sensor 2000 and the temperature sensor 1000.

[0046] In some embodiments, a first electric telescopic rod 3000 and a second electric telescopic rod 4000 are disposed in the cylindrical channel 321, and a driving end of the first electric telescopic rod 3000 moves in a direction toward or away from the first through hole 322 to pass through the first dustproof net 600 and insert into or away from the first through hole 322, and a driving end of the second electric telescopic rod 4000 moves in a direction toward or away from the second through hole 323 to pass through the second dustproof net 700 and insert into or away from the second through hole 323.

[0047] In the above embodiment, when the first electric telescopic rod 3000 is inserted into the first through hole 322, the first through hole 322 can be blocked to prevent coal powder from being attached to the first dustproof net 600 through the first through hole 322, so as to avoid excessive accumulation of coal powder on the first dustproof net 600 and affecting the use of the first dustproof net 600; when the second electric telescopic rod 4000 is inserted into the second through hole 323, the second through hole 323 can be blocked to prevent coal powder from being attached to the second dustproof net 700 through the second through hole 323, so as to avoid excessive accumulation of coal powder on the second dustproof net 700 and affecting the use of the second dustproof net 700. When the first electric telescopic rod 3000 is away from the first through hole 322, the gas in the coal powder bin can enter the columnar channel 321 through the first through hole 322, and when the second electric telescopic rod 4000 is away from the second through hole 323, the gas in the coal powder bin can enter the columnar channel 321 through the second through hole 323.

[0048] It should be noted that the oxygen concentration sensor 900 , the carbon monoxide sensor 2000 , the temperature sensor 1000 , the induced draft fan 800 , the first electric telescopic rod 3000 , and the second electric telescopic rod 4000 may all be connected to the controller for communication.

[0049] In addition, the induced draft fan 800 is switched between reverse blowing and forward blowing to blow away the coal powder on the first dust-proof net 600 and the second dust-proof net 700 .

[0050] In some possible embodiments, the coal powder bin level meter also includes a digital display device (not shown) arranged outside the coal powder bin 7000, and the digital display device is communicatively connected to the controller. The digital display device can be used to display the value of the coal powder layer level height, the value of the torque of the winding shaft 22, the value of the oxygen concentration, the value of the carbon monoxide concentration and the temperature for the convenience of viewing by the staff.

[0051] The specific use process of the coal powder silo level meter is exemplified below.

[0052] When the feeding mechanism is used to feed the coal powder bin 7000, the counterweight 32 can be placed at an initial height. When the dynamic torque sensor 5000 detects that the torque of the winding shaft 22 is the initial torque, the dynamic torque sensor 5000 feeds back the detected torque signal to the controller, and the controller can communicate with the feeding mechanism to control the feeding mechanism to stop feeding. For example, when the feeding mechanism is configured as a coal powder hopper, the controller can communicate with the valve on the coal powder hopper that controls the material to be dropped, and the controller controls the valve on the coal powder hopper to close the material drop channel.

[0053] When using the coal powder bin level meter to detect the material level height of the coal powder layer 8000 in the coal powder bin 7000, the clutch 300 is disconnected, and the cable 31 falls onto the coal powder layer driven by the counterweight 32, and the first Hall sensor 51 and the second Hall sensor 52 feed back the detected number of rotations of the first roller 91 and the second roller 92 to the controller, and the controller calculates the material level height of the coal powder layer.

[0054] When it is necessary to detect the environmental parameters in the coal powder bin 7000, the controller controls the clutch 300 to close, the drive motor 400 drives the winding drum 21 to rotate, and lifts the counterweight 32 to a preset height. Then the controller controls the driving ends of the first electric telescopic rod 3000 and the second electric telescopic rod 4000 to move away from the first through hole 322 and the second through hole 323 respectively. Then the controller controls the induced draft fan 800 to operate to introduce the gas in the coal powder bin into the cylindrical channel 321. Then the controller controls the oxygen concentration sensor 900, the carbon monoxide sensor 2000, and the temperature sensor 1000 to operate to detect the environmental parameters in the coal powder bin. After the detection is completed, the controller controls the induced draft fan 800, the oxygen concentration sensor 900, the carbon monoxide sensor 2000, and the temperature sensor 1000 to stop operating, and then controls the driving ends of the first electric telescopic rod 3000 and the second electric telescopic rod 4000 to insert into the first through hole 322 and the second through hole 323 respectively.

[0055] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0057] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A level meter for coal powder silo, characterized in that: The material level meter for the pulverized coal bin comprises: A wire winding and unwinding assembly includes a wire winding reel pivotally rotating about its own axis; A measuring assembly, comprising a cable wound around the cable reel and a counterweight connected to a free end of the cable, wherein the counterweight is disposed in the coal powder bin and is used to drive the free end of the cable to move downward in a vertical direction in the coal powder bin; A pressure wheel assembly, comprising a first roller and a second roller clamped on the cable, wherein the cable drives the first roller and the second roller to rotate around their own axes; a detection component, used for detecting the number of rotations of the first roller and the second roller; and a controller, which is in communication with the detection component and is used to obtain a material level height of the coal powder layer according to the number of rotations of the first roller and the second roller detected by the detection component; Wherein, the winding and unwinding wire assembly, the pressure wheel assembly, the detection assembly and the controller are all arranged outside the coal powder bin.

2. The material level meter for coal powder silo according to claim 1, characterized in that: The coal powder bin level meter also includes a shell arranged outside the coal powder bin, the winding and unwinding assembly, the detection assembly and the pressure wheel assembly are arranged in the shell, the winding and unwinding assembly also includes a winding shaft rotatably connected to the shell, and the winding drum is fixedly sleeved on the winding shaft. The coal powder bin level meter also includes a driving assembly, and the driving assembly includes a driving motor. The driving motor is connected to one end of the winding shaft through a clutch to drive the winding shaft and the winding drum to rotate.

3. The material level meter for coal powder silo according to claim 2, characterized in that: The coal powder bin level meter also includes a protective cover arranged on the shell and a damping assembly arranged in the protective cover, the end of the winding shaft away from the driving motor extends into the protective cover, the damping assembly includes an elastic baffle arranged on the protective cover and a gear connected to the end of the winding shaft away from the driving motor, the free end of the elastic baffle extends into the tooth groove of the gear to provide resistance when the gear rotates.

4. The material level meter for pulverized coal silo according to claim 2, characterized in that: The pulverized coal bin material level meter further comprises a dynamic torque sensor which is in communication with the controller, and the dynamic torque sensor is arranged in the housing and is used to detect the torque of the winding shaft.

5. The material level meter for pulverized coal silo according to claim 1, characterized in that: The pulverized coal bin material level meter further comprises a shell arranged outside the pulverized coal bin and a first support assembly and a second support assembly arranged inside the shell, wherein the first support assembly comprises a first bracket and a first rotating shaft, the first bracket is connected to the shell, the first rotating shaft is rotatably connected to the first bracket, the first roller is fixedly sleeved on the first rotating shaft, and the first roller can pivot around the axis of the first rotating shaft; and The second supporting assembly includes a second bracket and a second rotating shaft, the second bracket is connected to the shell, the second rotating shaft is rotatably connected to the second bracket, the second roller is fixedly sleeved on the second rotating shaft, and the second roller can pivot around the axis of the second rotating shaft.

6. The material level meter for pulverized coal silo according to claim 5, characterized in that: The detection component includes a first Hall sensor and a second Hall sensor, wherein the first Hall sensor is used to detect the number of rotations of the first roller, and the second Hall sensor is used to detect the number of rotations of the second roller.

7. The material level meter for pulverized coal silo according to claim 5, characterized in that: The first bracket includes a sleeve fixedly connected to the shell, a connecting rod movably inserted in the sleeve, and a spring connected to the connecting rod and the side wall of the shell, and the first rotating shaft is rotatably connected to one end of the connecting rod away from the spring.

8. The material level meter for pulverized coal silo according to claim 2, characterized in that: The shell has an outlet, and the free end of the cable passes through the outlet. An annular cover is provided at the outlet outside the shell, and an annular brush is provided inside the annular cover. The free end of the cable passes through the annular brush and is connected to the counterweight. The annular brush is used to clean the surface of the cable.

9. The material level meter for pulverized coal silo according to any one of claims 1 to 8, characterized in that: The counterweight comprises an outer shell and a cylindrical channel arranged in the outer shell, one end of the cylindrical channel is connected to the outside of the outer shell through a first through hole arranged on the outer shell, and the other end of the cylindrical channel is connected to the outside of the outer shell through a second through hole arranged on the outer shell, and a first dustproof net covering the first through hole and a second dustproof net covering the second through hole are respectively arranged at both ends of the cylindrical channel, an oxygen concentration sensor, a carbon monoxide sensor, a temperature sensor and an induced draft fan are arranged in the cylindrical channel, and the induced draft fan is used to suck the gas outside the outer shell into the cylindrical channel.

10. The material level meter for pulverized coal silo according to claim 9, characterized in that: A first electric telescopic rod and a second electric telescopic rod are arranged in the cylindrical channel, and a driving end of the first electric telescopic rod moves in a direction toward or away from the first through hole to pass through the first dustproof net and insert into or move away from the first through hole, and a driving end of the second electric telescopic rod moves in a direction toward or away from the second through hole to pass through the second dustproof net and insert into or move away from the second through hole.

Images