Air temperature adjusting device for inlet of coal mill

Abstract

The invention discloses a coal mill inlet air temperature adjusting device, which comprises a frame body, an air inlet, an air outlet, an air inlet and an air outlet, and is characterized in that the frame body is internally provided with a hole channel for air circulation; the multiple blade assemblies are rotationally arranged in the hole channels; and the regulation and control mechanism comprises a plurality of sliding assemblies which are arranged on the rotating shafts of the corresponding blade assemblies. According to the invention, the corresponding sliding assemblies are arranged on the rotating shafts of the blade assemblies, so that when the opening and closing angle of any blade assembly needs to be adjusted, the corresponding sliding assemblies are connected with the driving assembly through the butt joint assembly, and then the driving assembly can drive the corresponding sliding assemblies to move, so that the corresponding blade assemblies rotate; the air flow area in the hole channel is changed, the adjusted blade assembly is locked through the locking assembly, the position of the blade assembly can be kept unchanged in the using process, and therefore the effects that the multiple air door blades can be adjusted in a unified mode, and the needed blades can be adjusted according to requirements are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal-fired power generation, and particularly to an air temperature regulating device for the inlet of a coal mill. Background Art

[0002] The statements herein only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] In modern industrial production, the efficient operation of a coal mill is of great significance for improving energy utilization efficiency and ensuring product quality. The precise control of the air temperature at the inlet of the coal mill is one of the key factors to ensure the stable operation of the coal mill. At present, the air temperature at the inlet of the coal mill is mostly adjusted by controlling the opening degrees of the cold and hot air dampers at the inlet of the coal mill. Specifically, by adjusting the opening degrees of the cold air damper and the hot air damper, the proportion of cold and hot air entering the coal mill can be changed, so as to achieve the control of the mixed temperature at the inlet of the coal mill.

[0004] Traditional damper blades can only be adjusted uniformly during adjustment and are difficult to be readjusted locally. Although this adjustment method can meet the air temperature adjustment requirements to a certain extent, there are also some obvious deficiencies. First, the uniform adjustment method cannot accurately control the local air volume, resulting in uneven distribution of the flow field and temperature field in the air duct, affecting the operation efficiency and stability of the coal mill. Second, due to the lack of local adjustment ability, traditional damper blades are difficult to make accurate and rapid responses in the face of complex working condition changes, thus limiting the adjustment accuracy and adaptability of the entire system. Summary of the Invention

[0005] The purpose of the present invention is to provide an air temperature regulating device for the inlet of a coal mill to achieve the purpose of both uniformly adjusting multiple damper blades and adjusting the required blades according to requirements for the current deficiencies as described above.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: An air temperature regulating device for the inlet of a coal mill, comprising:

[0007] A frame body, which has a channel for gas to flow through inside;

[0008] Multiple blade assemblies, each of which is rotatably arranged in the channel;

[0009] A regulating mechanism, the regulating mechanism comprising:

[0010] Multiple sliding components, which are arranged on the rotating shafts of the corresponding blade assemblies and are used to drive the blade assemblies to rotate when moving along the axis direction of the rotating shafts of the blade assemblies;

[0011] Multiple locking components, which are used to lock the corresponding sliding components after the sliding components move in place;

[0012] A driving component, which is arranged on the frame and can move along the axis direction of the rotating shaft of the blade component;

[0013] A plurality of docking components, which are used to connect one or more sliding components to the driving component, enable the driving component to drive the corresponding sliding component to move, and enable the corresponding blade component to rotate, so as to change the gas flow area in the duct.

[0014] Further, the blade component is composed of two blades symmetrically arranged up and down. A gearbox is arranged on the frame. The two blade rotating shafts are respectively connected to the two output ends of the gearbox. When the input end of the gearbox rotates, the two blades rotate in opposite directions.

[0015] Further, the sliding component includes a collar sleeved on the input end of the gearbox. At least one guide bead inserted into the input end of the gearbox is arranged on the collar. A threaded guide groove for the movement of the guide bead is arranged on the input end of the gearbox.

[0016] Further, the locking component includes at least one fixed sleeve arranged on the gearbox. A piston rod penetrating the fixed sleeve and connected to the collar is arranged in the fixed sleeve. A piston movably sealed with the fixed sleeve is arranged at one end of the piston rod located in the fixed sleeve. A conduit communicated with the inner cavity of the fixed sleeve is arranged at one end of the fixed sleeve far away from the piston rod. An oil storage cylinder for storing hydraulic oil is arranged at one end of the conduit far away from the fixed sleeve. A valve component for controlling the flow of hydraulic oil is arranged in the oil storage cylinder.

[0017] Further, the driving component includes a linear module arranged on the frame and a dial rod driven by the linear module to move along the axis direction of the input end of the gearbox.

[0018] Further, the docking component includes a convex block slidably arranged on the collar. The convex block can move towards and away from one side of the moving area of the dial rod. A tension spring is arranged between the convex block and the collar. When the tension spring is in a natural state, the convex block is not located in the moving area of the dial rod;

[0019] The docking component further includes a mounting plate arranged on the gearbox and located at the top of the convex block. A pressing strip with a length not less than the moving length of the collar is arranged at the bottom of the mounting plate. A movable plate is arranged at the top of the mounting plate. At least two guide rods penetrating the mounting plate are arranged between the movable plate and the pressing strip. A first compression spring is arranged between the movable plate and the mounting plate. When the first compression spring is in a natural state, the pressing strip does not contact the convex block. An electromagnet capable of energizing and adsorbing the movable plate to move downwards is arranged at the top of the mounting plate. When the electromagnet is in an energized state, the pressing strip moves downwards and pushes the convex block to move into the moving area of the dial rod.

[0020] Further, the valve component includes a one-way valve disposed in the oil storage cylinder. The one-way valve is composed of a sealing ring fixedly disposed in the oil storage cylinder, a sealing plate disposed at the bottom of the sealing ring, and a second compression spring disposed at the bottom of the sealing plate. When the second compression spring is in a natural state, the sealing plate abuts against the sealing ring, dividing the interior of the oil storage cylinder into two non-communicating upper and lower chambers;

[0021] The valve component further includes a push rod disposed at the bottom of the movable plate. When the first compression spring is in a natural state, the push rod is located above the sealing ring. When the electromagnet is energized, the push rod moves downward and pushes the sealing plate away from the sealing ring.

[0022] The beneficial effects of the present invention are embodied in:

[0023] In the present invention, by providing a corresponding sliding component on the rotating shaft of the blade assembly, when it is necessary to adjust the opening and closing angle of any blade assembly, only need to first connect the corresponding sliding component with the driving component by using the docking component, then the driving component can drive the corresponding sliding component to move, so that the corresponding blade assembly rotates, changing the gas flow area in the channel. After the adjustment of the blade assembly is completed, it is locked by the locking component, and its position can be kept unchanged during use, so as to achieve the effect of both uniformly adjusting multiple damper blades and adjusting the required blades according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional view of the present invention;

[0025] Figure 2 is a structural view of the control mechanism and the gearbox of the present invention;

[0026] Figure 3 is a splicing schematic diagram of the sliding component and the docking component of the present invention;

[0027] Figure 4 is a structural view of the threaded guide groove of the present invention;

[0028] Figure 5 is a splicing schematic diagram of the fixed sleeve and the piston rod of the present invention;

[0029] Figure 6 is a partial cross-sectional view of the oil storage cylinder of the present invention.

[0030] In the figure:

[0031] 1. Housing; 2. Blade assembly; 3. Regulation mechanism; 31. Sliding assembly; 311. Collar; 312. Guide bead; 32. Locking assembly; 321. Fixed sleeve; 322. Piston rod; 323. Piston; 324. Conduit; 325. Oil storage cylinder; 326. Check valve; 327. Ejector rod; 33. Driving assembly; 331. Linear module; 332. Pusher rod; 34. Docking assembly; 341. Bump; 342. Tension spring; 343. Mounting plate; 344. Pressure strip; 345. Movable plate; 346. Guide rod; 347. First compression spring; 348. Electromagnet; 4. Gearbox. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-6 , the present invention discloses a regulating device for the inlet air temperature of a coal mill, including:

[0034] Housing 1, which has a channel for gas flow inside;

[0035] A plurality of blade assemblies 2, each of which is rotatably arranged in the channel;

[0036] Regulation mechanism 3, the regulation mechanism 3 includes:

[0037] A plurality of sliding assemblies 31, which are arranged on the rotating shafts of the corresponding blade assemblies 2 and are used to drive the blade assemblies 2 to rotate when moving along the axis direction of the rotating shafts of the blade assemblies 2;

[0038] A plurality of locking assemblies 32, which are used to lock the corresponding sliding assemblies 31 after the sliding assemblies 31 move in place;

[0039] Driving assembly 33, which is arranged on the housing 1 and can move along the axis direction of the rotating shafts of the blade assemblies 2;

[0040] A plurality of docking assemblies 34, which are used to connect one or more sliding assemblies 31 with the driving assembly 33, so that the driving assembly 33 can drive the corresponding sliding assemblies 31 to move, and the corresponding blade assemblies 2 to rotate, thereby changing the gas flow area in the channel.

[0041] In the present invention, by providing a corresponding sliding component 31 on the rotating shaft of the blade assembly 2, when it is necessary to adjust the opening and closing angle of any blade assembly 2, it is only necessary to first connect the corresponding sliding component 31 with the driving component 33 by using the docking component 34, and then the driving component 33 can be used to drive the corresponding sliding component 31 to move, so that the corresponding blade assembly 2 rotates, changing the gas flow area in the duct. After the adjustment is completed, the blade assembly 2 is locked by the locking component 32, so that its position remains unchanged during use, thereby achieving the effect of being able to uniformly adjust multiple damper blades and adjust the required blades according to requirements.

[0042] In one embodiment, the blade assembly 2 is composed of two blades symmetrically arranged up and down. A gearbox 4 is provided on the frame 1, and the two blade rotating shafts are respectively connected to the two output ends of the gearbox 4. When the input end of the gearbox 4 rotates, the two blades rotate in opposite directions.

[0043] With such a design, by setting two blades rotating in opposite directions as a group, the air flow passing through the blade assembly 2 is discharged from between the two blades. Not only can the air volume be adjusted by adjusting the distance between the two blades, but also it has a rectifying effect, which can improve the uniformity of the flow field and temperature field in the air duct, and improve the accuracy and stability of subsequent air temperature measurement, so as to be able to more precisely control the air temperature at the inlet of the coal mill.

[0044] It should be noted that the gearbox 4 belongs to the common knowledge in the art, so its specific structural composition and working principle will not be described in detail in this text.

[0045] In one embodiment, the sliding component 31 includes a collar 311 sleeved on the input end of the gearbox 4. At least one guide bead 312 inserted into the input end of the gearbox 4 is provided on the collar 311, and a threaded guide groove for the movement of the guide bead 312 is provided on the input end of the gearbox 4.

[0046] With such a design, when the collar 311 moves, it can drive the input end of the gearbox 4 to rotate through the cooperation of the guide bead 312 and the threaded guide groove. When the collar 311 stops moving to any position, the input end of the gearbox 4 is restricted by the guide bead 312 and the threaded guide groove and cannot continue to rotate. Therefore, the position of the blade after angle adjustment can be locked by locking the moving position of the collar 311.

[0047] In one embodiment, the locking assembly 32 includes at least one fixed sleeve 321 disposed on the gearbox 4. A piston rod 322 that penetrates the fixed sleeve 321 and is connected to the collar 311 is disposed inside the fixed sleeve 321. A piston 323 that is movably and sealingly connected to the fixed sleeve 321 is disposed at one end of the piston rod 322 inside the fixed sleeve 321. A conduit 324 that communicates with the inner cavity of the fixed sleeve 321 is disposed at one end of the fixed sleeve 321 away from the piston rod 322. An oil storage cylinder 325 for storing hydraulic oil is disposed at one end of the conduit 324 away from the fixed sleeve 321. A valve member for controlling the flow of hydraulic oil is disposed inside the oil storage cylinder 325.

[0048] With such a design, by filling hydraulic oil into the oil storage cylinder 325, when the position of the collar 311 changes, it will push the piston rod 322 and the piston 323 to move together inside the fixed sleeve 321, thereby causing a change in the oil storage volume inside the fixed sleeve 321. By controlling the valve member to open when the collar 311 moves, the hydraulic oil can normally enter and exit the oil storage cylinder 325. After the collar 311 moves into place, the valve member is controlled to close, so that the hydraulic oil inside the fixed sleeve 321 cannot be discharged, thereby enabling the positions of the piston rod 322 and the piston 323 not to move further, and thus completing the locking of the position of the collar 311.

[0049] In one embodiment, the driving assembly 33 includes a linear module 331 disposed on the frame 1 and a lever 332 that is driven by the linear module 331 to move along the axis direction of the input end of the gearbox 4.

[0050] With such a design, after the collar 311 is connected to the lever 332 through the docking assembly 34, it can move together with the lever 332, and only one driving source is required to complete the adjustment of the position of one or more blade assemblies 2.

[0051] In one embodiment, the docking assembly 34 includes a convex block 341 that is slidably disposed on the collar 311. The convex block 341 can move toward and away from the moving area side of the lever 332. A tension spring 342 is disposed between the convex block 341 and the collar 311. When the tension spring 342 is in a natural state, the convex block 341 is not located within the moving area of the lever 332;

[0052] The docking component 34 further includes a mounting plate 343 disposed on the gearbox 4 and located at the top of the bump 341. At the bottom of the mounting plate 343, there is a pressure strip 344 with a length not less than the moving length of the collar 311. At the top of the mounting plate 343, there is a movable plate 345. Between the movable plate 345 and the pressure strip 344, there are at least two guide rods 346 passing through the mounting plate 343. Between the movable plate 345 and the mounting plate 343, there is a first compression spring 347. When the first compression spring 347 is in its natural state, the pressure strip 344 does not contact the bump 341. At the top of the mounting plate 343, there is an electromagnet 348 capable of being energized to adsorb the movable plate 345 to move downward. When the electromagnet 348 is in the energized state, the pressure strip 344 moves downward and pushes the bump 341 into the moving area of the lever 332.

[0053] With such a design, when it is necessary to control the adjustment of the corresponding blade assembly 2, only need to energize the corresponding electromagnet 348 to make the electromagnet 348 adsorb the movable plate 345 to move downward, driving the pressure strip 344 to push the bump 341 into the moving area of the lever 332, so that when the lever travels, it can push the required collar 311 to move by pushing the bump 341.

[0054] Preferably, the sides of the pressure strip 344 and the bump 341 in contact with each other are both inclined planes, making it easier for the pressure strip 344 to push the bump 341 to move when the pressure strip 344 moves downward.

[0055] In an embodiment, the valve component includes a check valve 326 disposed in the oil storage cylinder 325. The check valve 326 is composed of a sealing ring fixedly disposed in the oil storage cylinder 325, a sealing plate disposed at the bottom of the sealing ring, and a second compression spring disposed at the bottom of the sealing plate. When the second compression spring is in its natural state, the sealing plate abuts against the sealing ring, dividing the interior of the oil storage cylinder 325 into two non - communicating chambers, upper and lower.

[0056] The valve component further includes a push rod 327 disposed at the bottom of the movable plate 345. When the first compression spring 347 is in its natural state, the push rod 327 is located above the sealing ring. When the electromagnet 348 is in the energized state, the push rod 327 moves downward and pushes the sealing plate away from the sealing ring.

[0057] With such a design, when the collar 311 moves away from the gearbox 4, the hydraulic oil can push the sealing plate away from the sealing ring under the action of negative pressure. By setting the direction in which the collar 311 moves away from the gearbox 4 as the direction for closing the blade, since the collar 311 has a tendency to move towards the gearbox 4 due to the gravity of the blade, and due to the action of the check valve 326, the hydraulic oil located below the check valve 326 cannot automatically retreat and drain, thus completing the locking of the position of the collar 311. When the movable plate 345 moves downward, the push rod 327 will move downward together and push the sealing plate away from the sealing ring. At this time, the check valve 326 no longer restricts the flow of the hydraulic oil, and thus the blade angle can be adjusted by the driving component 33.

[0058] In specific implementation, the weight of the bottom blade of the same blade assembly 2 needs to be greater than that of the top blade to ensure that the blade assembly 2 has a tendency to automatically open, enabling the valve component to operate stably.

[0059] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0060] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0061] In addition, "a plurality of" means more than two.

[0062] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A regulating device for the inlet air temperature of a coal mill, characterized in that, Comprising: A housing (1) having channels inside for gas to flow through; A plurality of blade assemblies (2), each of which is rotatably arranged inside the channels; A regulating mechanism (3), the regulating mechanism (3) comprising: A plurality of sliding components (31) arranged on the rotating shafts of the corresponding blade assemblies (2) and used for driving the blade assemblies (2) to rotate when moving along the axis direction of the rotating shafts of the blade assemblies (2); A plurality of locking components (32) used for locking the corresponding sliding components (31) after the sliding components (31) move into place; A driving component (33) arranged on the housing (1) and capable of moving along the axis direction of the rotating shafts of the blade assemblies (2); A plurality of docking components (34) used for connecting one or more sliding components (31) to the driving component (33), enabling the driving component (33) to drive the corresponding sliding components (31) to move, enabling the corresponding blade assemblies (2) to rotate, and changing the gas flow area inside the channels.

2. The air temperature regulating device at the inlet of the coal mill according to claim 1, characterized in that: The blade assembly (2) is composed of two blades symmetrically arranged up and down. A gearbox (4) is arranged on the housing (1). The two blade rotating shafts are respectively connected to the two output ends of the gearbox (4). When the input end of the gearbox (4) rotates, the two blades rotate in opposite directions.

3. The air temperature regulating device at the inlet of the coal mill according to claim 2, characterized in that: The sliding component (31) includes a collar (311) sleeved on the input end of the gearbox (4). At least one guide bead (312) inserted into the input end of the gearbox (4) is arranged on the collar (311). A threaded guide groove for the guide bead (312) to move is formed on the input end of the gearbox (4).

4. The air temperature regulating device at the inlet of the coal mill according to claim 3, characterized in that: The locking component (32) includes at least one fixed sleeve (321) arranged on the gearbox (4). A piston rod (322) passing through the fixed sleeve (321) and connected to the collar (311) is arranged inside the fixed sleeve (321). A piston (323) in dynamic sealing connection with the fixed sleeve (321) is arranged at one end of the piston rod (322) located inside the fixed sleeve (321). A conduit (324) communicating with the inner cavity of the fixed sleeve (321) is arranged at one end of the fixed sleeve (321) away from the piston rod (322). An oil storage cylinder (325) for storing hydraulic oil is arranged at one end of the conduit (324) away from the fixed sleeve (321). A valve component for controlling the flow of hydraulic oil is arranged inside the oil storage cylinder (325).

5. The air temperature regulating device at the inlet of the coal mill according to claim 4, characterized in that: The driving component (33) includes a linear module (331) arranged on the housing (1) and a lever (332) driven by the linear module (331) to move along the axis direction of the input end of the gearbox (4).

6. The air temperature regulating device at the inlet of the coal mill according to claim 5, wherein: The docking component (34) includes a convex block (341) slidably arranged on the collar (311). The convex block (341) can move towards and away from the moving area side of the lever (332). A tension spring (342) is arranged between the convex block (341) and the collar (311). When the tension spring (342) is in a natural state, the convex block (341) is not located inside the moving area of the lever (332); The docking component (34) further includes a mounting plate (343) disposed on the gearbox (4) and located at the top of the bump (341). A pressure bar (344) with a length not less than the moving length of the collar (311) is provided at the bottom of the mounting plate (343). A movable plate (345) is provided at the top of the mounting plate (343). At least two guide rods (346) penetrating the mounting plate (343) are provided between the movable plate (345) and the pressure bar (344). A first compression spring (347) is provided between the movable plate (345) and the mounting plate (343). When the first compression spring (347) is in a natural state, the pressure bar (344) does not contact the bump (341). An electromagnet (348) capable of energizing and adsorbing the movable plate (345) to move downward is provided at the top of the mounting plate (343). When the electromagnet (348) is in an energized state, the pressure bar (344) moves downward and pushes the bump (341) into the moving area of the toggle lever (332).

7. The air temperature regulating device at the inlet of the coal mill according to claim 6, characterized in that: The valve component includes a check valve (326) disposed in the oil storage cylinder (325). The check valve (326) is composed of a sealing ring fixedly disposed in the oil storage cylinder (325), a sealing plate disposed at the bottom of the sealing ring, and a second compression spring disposed at the bottom of the sealing plate. When the second compression spring is in a natural state, the sealing plate abuts against the sealing ring, dividing the interior of the oil storage cylinder (325) into two non-communicating chambers, upper and lower. The valve component further includes a push rod (327) disposed at the bottom of the movable plate (345). When the first compression spring (347) is in a natural state, the push rod (327) is located above the sealing ring. When the electromagnet (348) is in an energized state, the push rod (327) moves downward and pushes the sealing plate away from the sealing ring.

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