Shutter and coal mill

Abstract

The invention provides a shutter and a coal mill, the shutter comprises: a frame; the multiple blades are movably and pivotally arranged in the frame, the multiple blades are arranged from top to bottom, and pivots of every two adjacent blades are hinged to the corresponding first connecting rod; the driving assembly comprises a driving cylinder and a second connecting rod structure connected to the driving cylinder and hinged to the pivot of the lowest blade, the second connecting rod structure comprises two second connecting rods hinged to each other, and the driving cylinder drives the second connecting rod structure to move so that the second connecting rod structure can drive the first connecting rods to move at the same time; the first opening positions form a first preset included angle relative to the vertical direction, the closing positions are arranged in parallel relative to the vertical direction, and the first opening positions are different. According to the technical scheme, the problems that in the prior art, the blades for air volume adjustment of the louver are opened at the same time, and the sizes of opened openings are consistent are effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of carbon dioxide capture, and in particular to a shutter and a coal mill. Background Art

[0002] The louvers of the coal mill in the related technology can adjust the primary air volume entering the burner to ensure the proper mixing ratio of coal powder and air, so as to optimize the combustion efficiency of the burner and reduce pollutant emissions. That is, the fine coal powder ground in the coal mill is blown to the burner for combustion. However, when the coal powder is burned in the burner, it often burns incompletely or burns with excessive oxygen. An important reason is that the air volume adjustment blades of the louver are opened at the same time, and the opening size is the same, resulting in a consistent air volume, and the air volume cannot be adjusted. Summary of the invention

[0003] The main purpose of the present invention is to provide a shutter and a coal mill to solve the problem in the related art that the blades of the shutter for adjusting the air volume are opened at the same time and the sizes of the opened openings are consistent.

[0004] To achieve the above-mentioned purpose, according to one aspect of the present invention, a shutter is provided, comprising: a frame; a plurality of blades, movably and pivotably arranged in the frame, the plurality of blades are arranged from top to bottom, and the pivots of two adjacent blades are hinged on a first connecting rod; a driving assembly, comprising a driving cylinder and a second connecting rod structure connected to the driving cylinder and hinged to the pivot of the lowest blade, the second connecting rod structure comprising two second connecting rods hinged to each other, the driving cylinder drives the second connecting rod structure to move, so that the second connecting rod structure simultaneously drives the first connecting rod to move, so that the plurality of blades have a plurality of first open positions at a first preset angle relative to the up and down directions and a closed position arranged parallel to the up and down directions, wherein the plurality of first open positions are different.

[0005] Furthermore, the first preset angle includes a first angle, a second angle, a third angle and a fourth angle of different angles, and a first slide groove extending in the up and down directions, a second slide groove forming a first angle with the first slide groove, a third slide groove forming a second angle with the first slide groove, a fourth slide groove forming a third angle with the first slide groove, and a fifth slide groove forming a fourth angle with the first slide groove are provided on the side of the frame, the second slide groove, the third slide groove, the fourth slide groove and the fifth slide groove are all connected to the first slide groove, and the pivot of each blade has a transmission plane, and when the transmission plane of each blade moves into the first slide groove, multiple blades are in a closed position; when the transmission plane of the first blade moves into the second slide groove, at the same time, the transmission plane of the second blade moves into the third slide groove, the transmission plane of the third blade moves into the fourth slide groove, and the transmission plane of the fourth blade moves into the fifth slide groove, and multiple blades are in multiple first open positions.

[0006] Furthermore, the first angle is 30 degrees, the second angle is 40 degrees, the third angle is 50 degrees, and the fourth angle is 60 degrees.

[0007] Further, when the transmission plane of the first blade moves into the second slide groove, the transmission plane of the first blade cooperates with the groove side wall stop of the second slide groove; when the transmission plane of the second blade moves into the third slide groove, the transmission plane of the second blade cooperates with the groove side wall stop of the third slide groove; when the transmission plane of the third blade moves into the fourth slide groove, the transmission plane of the third blade cooperates with the groove side wall stop of the fourth slide groove; when the transmission plane of the fourth blade moves into the fifth slide groove, the transmission plane of the fourth blade cooperates with the groove side wall stop of the fifth slide groove.

[0008] Furthermore, a first telescopic plate is provided on the second slide groove, the third slide groove, the fourth slide groove and the fifth slide groove, and the first telescopic plate has a retracted first avoidance position and an extended first guide position, wherein when the first telescopic plate is in the first guide position, the transmission plane of the first blade moves from the first slide groove to the second slide groove, and when the first telescopic plate is in the first avoidance position, the transmission plane of the first blade moves from the second slide groove to the first slide groove.

[0009] Furthermore, the plurality of blades also have a plurality of second open positions at a second preset angle relative to the up-down direction, the second preset angle being greater than the first preset angle, wherein the plurality of second open positions are the same.

[0010] Furthermore, the second preset angle includes a fifth angle, a sixth angle, a seventh angle and an eighth angle of the same angle, and a first slide groove extending in the up and down direction, a sixth slide groove forming a fifth angle with the first slide groove, a seventh slide groove forming a sixth angle with the first slide groove, an eighth slide groove forming a seventh angle with the first slide groove, and a ninth slide groove forming an eighth angle with the first slide groove are provided on the side of the frame, the sixth slide groove, the seventh slide groove, the eighth slide groove and the ninth slide groove are all connected to the first slide groove, and the pivot of each blade has a transmission plane, and when the transmission plane of each blade moves into the first slide groove, multiple blades are in a closed position; when the transmission plane of the first blade moves into the sixth slide groove, the transmission plane of the second blade moves into the seventh slide groove, the transmission plane of the third blade moves into the eighth slide groove, and the transmission plane of the fourth blade moves into the ninth slide groove, and multiple blades are in multiple second open positions.

[0011] Further, when the transmission plane of the first blade moves into the sixth slide groove, the transmission plane of the first blade cooperates with the groove side wall stop of the sixth slide groove; when the transmission plane of the second blade moves into the seventh slide groove, the transmission plane of the second blade cooperates with the groove side wall stop of the seventh slide groove; when the transmission plane of the third blade moves into the eighth slide groove, the transmission plane of the third blade cooperates with the groove side wall stop of the eighth slide groove; when the transmission plane of the fourth blade moves into the ninth slide groove, the transmission plane of the fourth blade cooperates with the groove side wall stop of the ninth slide groove; and / or the fifth angle, the sixth angle, the seventh angle and the eighth angle are all 90 degrees.

[0012] Furthermore, a second telescopic plate is provided on the sixth slide groove, the seventh slide groove, the eighth slide groove and the ninth slide groove, and the second telescopic plate has a retracted second avoidance position and an extended second guide position, wherein when the second telescopic plate is in the second guide position, the transmission plane of the first blade moves from the first slide groove to the sixth slide groove, and when the second telescopic plate is in the second avoidance position, the transmission plane of the first blade moves from the sixth slide groove to the first slide groove.

[0013] According to another aspect of the present invention, a coal mill is provided, comprising a shutter, wherein the shutter is the shutter described above.

[0014] According to the technical solution of the present invention, the shutter comprises: a frame, a plurality of blades and a driving assembly. The plurality of blades are movably and pivotally arranged in the frame, the plurality of blades are arranged from top to bottom, and the pivots of two adjacent blades are both hinged on the first connecting rod. The driving assembly comprises a driving cylinder and a second connecting rod structure connected to the driving cylinder and the pivot of the lowest blade, the second connecting rod structure comprises two second connecting rods hinged to each other, the driving cylinder drives the second connecting rod structure to move, so that the second connecting rod structure simultaneously drives the first connecting rod to move, so that the plurality of blades have a plurality of first opening positions at a first preset angle relative to the up and down direction and a closed position arranged parallel to the up and down direction, wherein the plurality of first opening positions are different. In this way, when the plurality of blades are in different first opening positions at the same time, the size of the opening of each blade is inconsistent. In this way, the air volume is adjusted inconsistently, so that the pulverized coal is burned as thoroughly as possible when the burner burns. Therefore, the technical solution of the present application effectively solves the problem in the related art that the blades of the shutter for air volume adjustment are opened at the same time and the size of the opening is consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1A simplified structural diagram showing a first blade of an embodiment of a shutter according to the present invention is shown in a first open position;

[0017] Figure 2 Shows Figure 1 An enlarged schematic diagram of the shutter at A;

[0018] Figure 3 Shows Figure 1 A simplified structural diagram of multiple blades and a drive assembly of a shutter;

[0019] Figure 4 Shows Figure 1 A schematic diagram of the structure of the shutter when the first blade is in the closed position;

[0020] Figure 5 Shows Figure 1 A simplified structural diagram of the shutter when the first blade is in the second open position.

[0021] The above drawings include the following reference numerals:

[0022] 10. frame; 11. first chute; 12. second chute; 13. third chute; 14. fourth chute; 15. fifth chute; 16. sixth chute; 17. seventh chute; 18. eighth chute; 19. ninth chute;

[0023] 20. blade; 21. pivot; 211. transmission plane; 22. first connecting rod;

[0024] 30. driving assembly; 31. driving cylinder; 32. second connecting rod structure;

[0025] 41. A first telescopic plate; 42. A second telescopic plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0029] like Figures 1 to 4 As shown, the present application provides a Venetian blind, and an embodiment of the Venetian blind includes: a frame 10, a plurality of blades 20, and a driving assembly 30. The plurality of blades 20 are movably and pivotably arranged in the frame 10, the plurality of blades 20 are arranged from top to bottom, and the pivots 21 of two adjacent blades 20 are both hinged on the first connecting rod 22. The driving assembly 30 includes a driving cylinder 31 and a second connecting rod structure 32 connected to the driving cylinder 31 and the pivot 21 of the lowest blade 20, the second connecting rod structure 32 includes two second connecting rods that are hinged, the driving cylinder 31 drives the second connecting rod structure 32 to move, so that the second connecting rod structure 32 simultaneously drives the first connecting rod 22 to move, so that the plurality of blades 20 have a plurality of first open positions at a first preset angle relative to the up and down direction and a closed position arranged in parallel relative to the up and down direction, wherein the plurality of first open positions are different.

[0030] By applying the technical solution of this embodiment, the driving cylinder 31 drives the second connecting rod structure 32 to move, so that the second connecting rod structure 32 simultaneously drives the first connecting rod 22 to move, so that the multiple blades 20 have multiple first open positions with a first preset angle relative to the up and down direction, wherein the multiple first open positions are different. In this way, when the multiple blades 20 are in different multiple first open positions at the same time, the size of the opening of each blade 20 is inconsistent. In this way, the air volume is adjusted inconsistently so that the pulverized coal can be burned as thoroughly as possible when the burner burns. Therefore, the technical solution of this embodiment effectively solves the problem in the related art that the blades of the air volume adjustment of the shutter are opened at the same time and the size of the opening is consistent. When the multiple blades 20 are in the closed position, the opening of each blade 20 is 0 degrees.

[0031] like Figures 1 to 4 As shown, the first preset angle includes a first angle, a second angle, a third angle and a fourth angle of different angles. The side of the frame 10 is provided with a first slide groove 11 extending in the up-down direction, a second slide groove 12 which forms a first angle with the first slide groove 11, a third slide groove 13 which forms a second angle with the first slide groove 11, a fourth slide groove 14 which forms a third angle with the first slide groove 11, and a fifth slide groove 15 which forms a fourth angle with the first slide groove 11. The second slide groove 12, the third slide groove 13, the fourth slide groove 14 and the fifth slide groove 15 are all connected to the first slide groove 11. Each leaf The pivots 21 of the blades 20 all have a transmission plane 211. When the transmission plane 211 of each blade 20 moves into the first slide groove 11, multiple blades 20 are in a closed position; when the transmission plane 211 of the first blade 20 moves into the second slide groove 12, the transmission plane 211 of the second blade 20 moves into the third slide groove 13 at the same time, the transmission plane 211 of the third blade 20 moves into the fourth slide groove 14, and the transmission plane 211 of the fourth blade 20 moves into the fifth slide groove 15, and multiple blades 20 are in multiple first open positions.

[0032] like Figures 1 to 4 As shown, the first angle is 30 degrees, the second angle is 40 degrees, the third angle is 50 degrees, and the fourth angle is 60 degrees. In this way, the air volume can be adjusted linearly in the entire working range at 30 degrees, 40 degrees, 50 degrees and 0 degrees at the same time.

[0033] like Figures 1 to 4As shown, when the transmission plane 211 of the first blade 20 moves into the second chute 12, the transmission plane 211 of the first blade 20 cooperates with the groove side wall stop of the second chute 12; when the transmission plane 211 of the second blade 20 moves into the third chute 13, the transmission plane 211 of the second blade 20 cooperates with the groove side wall stop of the third chute 13; when the transmission plane 211 of the third blade 20 moves into the fourth chute 14, the transmission plane 211 of the third blade 20 cooperates with the groove side wall stop of the fourth chute 14; when the transmission plane 211 of the fourth blade 20 moves into the fifth chute 15, the transmission plane 211 of the fourth blade 20 cooperates with the groove side wall stop of the fifth chute 15. In this way, multiple blades 20 can be kept in multiple first open positions at the same time.

[0034] like Figures 1 to 4 As shown, the second slide slot 12, the third slide slot 13, the fourth slide slot 14 and the fifth slide slot 15 are all provided with a first telescopic plate 41, and the first telescopic plate 41 has a retracted first avoidance position and an extended first guiding position, wherein when the first telescopic plate 41 is in the first guiding position, the transmission plane 211 of the first blade 20 moves from the first slide slot 11 to the second slide slot 12, and when the first telescopic plate 41 is in the first avoidance position, the transmission plane 211 of the first blade 20 moves from the second slide slot 12 to the first slide slot 11. Similarly, the transmission plane 211 of the second blade 20 can move into the first slide slot 11 or the third slide slot 13, the transmission plane 211 of the third blade 20 can move into the first slide slot 11 or the fourth slide slot 14, and the transmission plane 211 of the fourth blade 20 can move into the first slide slot 11 or the fifth slide slot 15.

[0035] The structures of the third sliding groove 13 , the fourth sliding groove 14 and the fifth sliding groove 15 are the same as that of the second sliding groove 12 .

[0036] like Figures 1 to 5 As shown, the plurality of blades 20 also have a plurality of second open positions at a second preset angle relative to the up-down direction, the second preset angle being greater than the first preset angle, wherein the plurality of second open positions are the same.

[0037] like Figures 1 to 5As shown, the second preset angle includes a fifth angle, a sixth angle, a seventh angle and an eighth angle of the same angle. The side of the frame 10 is provided with a first slide groove 11 extending in the up-down direction, a sixth slide groove 16 forming a fifth angle with the first slide groove 11, a seventh slide groove 17 forming a sixth angle with the first slide groove 11, an eighth slide groove 18 forming a seventh angle with the first slide groove 11, and a ninth slide groove 19 forming an eighth angle with the first slide groove 11. The sixth slide groove 16, the seventh slide groove 17, the eighth slide groove 18 and the ninth slide groove 19 are all connected to the first slide groove 11, and each leaf The pivots 21 of the blades 20 all have a transmission plane 211. When the transmission plane 211 of each blade 20 moves into the first slide groove 11, multiple blades 20 are in a closed position; when the transmission plane 211 of the first blade 20 moves into the sixth slide groove 16, the transmission plane 211 of the second blade 20 moves into the seventh slide groove 17 at the same time, the transmission plane 211 of the third blade 20 moves into the eighth slide groove 18, and the transmission plane 211 of the fourth blade 20 moves into the ninth slide groove 19, and multiple blades 20 are in multiple second open positions.

[0038] like Figures 1 to 5 As shown, when the transmission plane 211 of the first blade 20 moves into the sixth chute 16, the transmission plane 211 of the first blade 20 cooperates with the groove side wall stop of the sixth chute 16; when the transmission plane 211 of the second blade 20 moves into the seventh chute 17, the transmission plane 211 of the second blade 20 cooperates with the groove side wall stop of the seventh chute 17; when the transmission plane 211 of the third blade 20 moves into the eighth chute 18, the transmission plane 211 of the third blade 20 cooperates with the groove side wall stop of the eighth chute 18; when the transmission plane 211 of the fourth blade 20 moves into the ninth chute 19, the transmission plane 211 of the fourth blade 20 cooperates with the groove side wall stop of the ninth chute 19. The fifth angle, the sixth angle, the seventh angle and the eighth angle are all 90 degrees. At this time, the air volume is 100%, so that the linear working characteristics of the blades 20 are fully reflected in the adjustment process of multiple blades 20 and play a positive role in energy-saving and economical operation.

[0039] In this embodiment, the structures of the seventh slide groove 17, the eighth slide groove 18 and the ninth slide groove 19 are the same as the structure of the sixth slide groove 16. The groove side wall of the sixth slide groove 16 includes an upper side wall and a left side wall. The upper side wall includes a first transition surface and a second transition surface set at an obtuse angle. The transmission plane 211 of the first blade 20 cooperates with the groove side wall stop of the sixth slide groove 16, that is, when cooperating with the left side wall stop of the sixth slide groove 16, the first slide groove 11 gradually passes through the first transition surface and the second transition surface, and then turns over and reaches the left side wall of the sixth slide groove 16, so that the first blade 20 forms a sixth angle. The first transition surface, the second transition surface and the left side wall of the sixth slide groove 16 are arc transitions between each other.

[0040] like Figures 1 to 5 As shown, the sixth chute 16, the seventh chute 17, the eighth chute 18 and the ninth chute 19 are all provided with a second telescopic plate 42, and the second telescopic plate 42 has a retracted second avoidance position and an extended second guiding position, wherein when the second telescopic plate 42 is in the second guiding position, the transmission plane 211 of the first blade 20 moves from the first chute 11 to the sixth chute 16, and when the second telescopic plate 42 is in the second avoidance position, the transmission plane 211 of the first blade 20 moves from the sixth chute 16 to the first chute 11. Similarly, the transmission plane 211 of the second blade 20 can move into the first chute 11 or the seventh chute 17, the transmission plane 211 of the third blade 20 can move into the first chute 11 or the eighth chute 18, and the transmission plane 211 of the fourth blade 20 can move into the first chute 11 or the ninth chute 19.

[0041] The design principle of the shutter of the present application is to drive the second connecting rod structure 32 to move through the telescopic movement of the drive cylinder 31, and then the first connecting rod 22 drives multiple blades 20 to pivot in the frame 10 to form a first open position at different angles, thereby realizing nonlinear adjustment of the air volume. The implementation effect is that it can flexibly adjust the incoming air volume according to the actual needs of the burner, ensure the appropriate mixing ratio of coal powder and air, optimize combustion efficiency, and reduce pollutant emissions. The application scenario is mainly in the primary air volume regulation of the coal mill, especially in situations where the air volume needs to be precisely controlled to achieve the best combustion effect. The use process is to adjust the opening angle of the blade 20 by controlling the extension and contraction of the drive cylinder 31 according to the operating state of the burner, thereby controlling the air volume and realizing the optimization of the combustion process.

[0042] In this embodiment, the shutter realizes precise control of the blade 20 at different opening positions by setting a plurality of slides of different angles on the side of the frame 10. The principle is that the transmission plane 211 on the pivot 21 of the blade 20 moves along the first slide 11 to the second slide 12, the third slide 13, the fourth slide 14 and the fifth slide 15 under the action of the driving assembly 30, and each slide corresponds to a specific opening angle, thereby forming a plurality of first opening positions. The implementation effect is to improve the flexibility and accuracy of air volume regulation, and can adjust the opening angle of the blade 20 according to different combustion requirements to achieve nonlinear adjustment of air volume. The application scenarios include industrial combustion equipment that requires precise control of air volume, such as coal mills, boilers, etc., especially in situations where the air volume needs to be adjusted in real time according to the combustion process to improve combustion efficiency and reduce pollutant emissions. The use process is to control the movement of the blade 20 in different slides by extending and retracting the drive cylinder 31, thereby adjusting the opening angle of the blade 20 and achieving precise control of the air volume.

[0043] In this embodiment, the angles formed by the blades 20 of the shutters when opened are 30 degrees, 40 degrees, 50 degrees and 60 degrees respectively. The design principle is to set the slide grooves at different angles so that the blades 20 can form a gradient-changing air volume adjustment when opened to adapt to different combustion requirements. The implementation effect is to improve the linearity of the air volume adjustment, making the air volume adjustment smoother, and avoiding the adjustment limitations caused by the simultaneous opening of the blades of the traditional shutters at the same angle. The application scenario is in combustion equipment that requires linear adjustment of the air volume, especially in industrial equipment such as coal mills and boilers, which can flexibly adjust the air volume according to the needs of the combustion process, improve combustion efficiency, and reduce pollutant emissions. The use process is to control the extension and retraction of the drive cylinder 31 according to the operating state and needs of the burner, so that the blades 20 move in the slide grooves at different angles, thereby realizing the gradient change adjustment of the air volume.

[0044] In this embodiment, when the blades 20 of the shutter are opened, the transmission plane 211 cooperates with the side wall stops of different chutes to ensure that the blades 20 can be stably maintained in the preset open position. The design principle is to use the contact between the transmission plane 211 and the side wall of the chute to form a physical stop to limit the further movement of the blade 20, thereby keeping the blade 20 in the open position at a specific angle. The implementation effect is to improve the stability of the blade 20 in the open position, avoid the displacement of the position of the blade 20 under the action of wind pressure, and ensure the accuracy of air volume adjustment. Application scenarios include industrial combustion equipment, such as coal mills, boilers, etc., especially in occasions where precise control of air volume is required to improve combustion efficiency and reduce pollutant emissions. The use process is to move the transmission plane 211 of the blade 20 into the corresponding chute through the extension and contraction of the drive cylinder 31, and form a stop with the side wall of the chute, so as to stably maintain the preset open position and achieve precise control of the air volume.

[0045] In this embodiment, the shutters are provided with a first telescopic plate 41 on the second slide 12, the third slide 13, the fourth slide 14 and the fifth slide 15, which is used to guide the movement of the transmission plane 211 of the blade 20 between the slides. The design principle is to provide guidance and avoidance for the movement of the blade 20 through the extension and contraction of the first telescopic plate 41, so as to ensure that the blade 20 can smoothly move between slides at different angles and realize nonlinear adjustment of the air volume. The implementation effect is to improve the smoothness and accuracy of the movement of the blade 20 between the slides, avoid the jamming and position deviation that the blade 20 may encounter during the movement, and ensure the accuracy and reliability of the air volume adjustment. Application scenarios include industrial combustion equipment, such as coal mills, boilers, etc., especially in situations where the air volume needs to be accurately controlled to improve combustion efficiency and reduce pollutant emissions. The usage process is that when the blade 20 needs to move to the next slide slot, the first telescopic plate 41 is controlled to extend to the first guide position to provide guidance for the movement of the blade 20; when the blade 20 needs to return to the previous slide slot, the first telescopic plate 41 is controlled to retract to the first avoidance position to provide avoidance space for the movement of the blade 20, ensuring that the blade 20 can move smoothly between slide slots at different angles to achieve nonlinear adjustment of the air volume.

[0046] In this embodiment, the blades 20 of the shutters have a second open position with the same angle in addition to a first open position with different angles, and the second preset angle is greater than the first preset angle. The design principle is to set a second open position with a larger angle to meet higher air volume requirements, while keeping multiple blades 20 open at the same angle to achieve uniform adjustment of the air volume. The implementation effect is to improve the adjustment ability of the shutters when the air volume is high, ensuring the uniformity and stability of the air volume. Application scenarios include air volume adjustment of industrial combustion equipment during high-load operation, such as coal mills, boilers, etc., especially in situations where the air volume needs to be adjusted quickly to cope with changes in combustion load. The use process is to control the drive assembly 30 to move the blades 20 to the second open position when the air volume is high, forming an opening at the same angle, so as to achieve uniform adjustment of the air volume to meet the high-load operation requirements of the combustion equipment.

[0047] In this embodiment, the blades 20 of the shutters can form a second open position with the same angle when opened, and the angles are respectively the fifth angle, the sixth angle, the seventh angle and the eighth angle, and these angles are all greater than the angles in the first preset angle. The design principle is to set a larger angle of the slide slot so that the blades 20 can form a larger opening when opened to meet higher air volume requirements, while keeping multiple blades 20 open at the same angle to achieve uniform adjustment of the air volume. The implementation effect is to improve the adjustment ability of the shutters when high air volume requirements are required, ensure the uniformity and stability of the air volume, avoid unevenness in the air volume adjustment process, and improve combustion efficiency and stability. Application scenarios include air volume adjustment of industrial combustion equipment during high load operation, such as coal mills, boilers, etc., especially in situations where the air volume needs to be adjusted quickly to cope with changes in combustion load. The use process is that when high air volume is required, the driving component 30 is controlled to move the transmission plane 211 of the blade 20 to the sixth slide groove 16, the seventh slide groove 17, the eighth slide groove 18 or the ninth slide groove 19 to form a second open position with the same angle, thereby achieving uniform adjustment of the air volume to meet the high-load operation requirements of the combustion equipment.

[0048] In this embodiment, when the blades 20 of the blinds are opened to the maximum angle, the angle formed is 90 degrees, that is, the blades 20 are parallel to the side of the frame 10. The design principle is to set the maximum angle of the slide slot so that the blades 20 can form the maximum opening when opened to meet the extreme air volume requirements, while keeping multiple blades 20 open at the same angle to achieve uniform adjustment of the air volume. The implementation effect is to improve the adjustment ability of the blinds when the extreme air volume is required, ensure the uniformity and stability of the air volume, avoid unevenness in the air volume adjustment process, and improve combustion efficiency and stability. Application scenarios include air volume adjustment of industrial combustion equipment during extreme load operation, such as coal mills, boilers, etc., especially in situations where it is necessary to quickly adjust to the maximum air volume to cope with changes in combustion load. The usage process is that when the extreme air volume is required, the drive component 30 is controlled to move the transmission plane 211 of the blade 20 to the sixth slide groove 16, the seventh slide groove 17, the eighth slide groove 18 or the ninth slide groove 19, forming a stopper with the side wall of the slide groove to form a 90-degree open position, thereby achieving uniform adjustment of the maximum air volume to meet the extreme load operation requirements of the combustion equipment.

[0049] In this embodiment, the shutter is provided with a second telescopic plate 42 on the sixth chute 16, the seventh chute 17, the eighth chute 18 and the ninth chute 19, which is used to guide the movement of the transmission plane 211 of the blade 20 between the chute, especially when the blade 20 needs to move to the second open position of the maximum angle. The design principle is to provide guidance and avoidance for the movement of the blade 20 through the extension and contraction of the second telescopic plate 42, so as to ensure that the blade 20 can smoothly move between the chute at different angles, and realize the nonlinear adjustment of the air volume, especially when it is necessary to quickly adjust to the maximum air volume. The implementation effect is to improve the smoothness and accuracy of the movement of the blade 20 between the chute, avoid the jamming and position deviation that the blade 20 may encounter during the movement, and ensure the accuracy and reliability of the air volume adjustment, especially when the air volume is high. The application scenarios include air volume adjustment of industrial combustion equipment during high load operation, such as coal mills, boilers, etc., especially in occasions where it is necessary to quickly adjust to the maximum air volume to cope with changes in combustion load. The usage process is that when the blade 20 needs to move to the second open position with the maximum angle, the second telescopic plate 42 is controlled to extend to the second guide position to provide guidance for the movement of the blade 20; when the blade 20 needs to return to the closed position, the second telescopic plate 42 is controlled to retract to the second avoidance position to provide avoidance space for the movement of the blade 20, ensuring that the blade 20 can move smoothly between the slide grooves at different angles, thereby realizing nonlinear adjustment of the air volume, especially when it is necessary to quickly adjust to the maximum air volume.

[0050] The present application also provides a coal mill, an embodiment of the coal mill includes a shutter, and the shutter is the above-mentioned shutter. Since the above-mentioned shutter can solve the problem that the air volume adjustment blades of the shutter in the related art are opened at the same time and the opening size is consistent, the coal mill including the shutter can solve the same technical problem.

[0051] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0053] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shutter, characterized in that: include: Frame (10); A plurality of blades (20) are movably and pivotably arranged in the frame (10), the plurality of blades (20) are arranged from top to bottom, and the pivots (21) of two adjacent blades (20) are both hinged on a first connecting rod (22); A driving assembly (30) comprises a driving cylinder (31) and a second connecting rod structure (32) connected to the driving cylinder (31) and a pivot (21) of the lowest blade (20), wherein the second connecting rod structure (32) comprises two second connecting rods that are hinged to each other, and the driving cylinder (31) drives the second connecting rod structure (32) to move, so that the second connecting rod structure (32) simultaneously drives the first connecting rod (22) to move, so that the plurality of blades (20) have a plurality of first open positions that form a first preset angle relative to the up and down directions and a closed position that is arranged parallel to the up and down directions, wherein the plurality of first open positions are different.

2. The shutter according to claim 1, characterized in that: The first preset angle includes a first angle, a second angle, a third angle and a fourth angle of different angles. The side of the frame (10) is provided with a first slide groove (11) extending along the up-down direction, a second slide groove (12) forming the first angle with the first slide groove (11), a third slide groove (13) forming the second angle with the first slide groove (11), a fourth slide groove (14) forming the third angle with the first slide groove (11), and a fifth slide groove (15) forming the fourth angle with the first slide groove (11). The second slide groove (12), the third slide groove (13), the fourth slide groove (14) and the fifth slide groove (15) are all connected to the first slide groove (11). The pivot (21) of each blade (20) has a transmission plane (211). When the transmission plane (211) of each blade (20) moves into the first slide groove (11), the plurality of blades (20) are in the closed position; when the transmission plane (211) of the first blade (20) moves into the second slide groove (12), at the same time, the transmission plane (211) of the second blade (20) moves into the third slide groove (13), the transmission plane (211) of the third blade (20) moves into the fourth slide groove (14), and the transmission plane (211) of the fourth blade (20) moves into the fifth slide groove (15), and the plurality of blades (20) are in the plurality of first open positions.

3. The shutter according to claim 2, characterized in that: The first angle is 30 degrees, the second angle is 40 degrees, the third angle is 50 degrees, and the fourth angle is 60 degrees.

4. The shutter according to claim 2, characterized in that: When the transmission plane (211) of the first blade (20) moves into the second slide groove (12), the transmission plane (211) of the first blade (20) cooperates with the groove side wall stopper of the second slide groove (12); when the transmission plane (211) of the second blade (20) moves into the third slide groove (13), the transmission plane (211) of the second blade (20) cooperates with the groove side wall stopper of the third slide groove (13); when the transmission plane (211) of the third blade (20) moves into the fourth slide groove (14), the transmission plane (211) of the third blade (20) cooperates with the groove side wall stopper of the fourth slide groove (14); when the transmission plane (211) of the fourth blade (20) moves into the fifth slide groove (15), the transmission plane (211) of the fourth blade (20) cooperates with the groove side wall stopper of the fifth slide groove (15).

5. The shutter according to claim 2, characterized in that: The second slide groove (12), the third slide groove (13), the fourth slide groove (14) and the fifth slide groove (15) are all provided with a first telescopic plate (41), and the first telescopic plate (41) has a retracted first avoidance position and an extended first guiding position, wherein when the first telescopic plate (41) is at the first guiding position, the transmission plane (211) of the first blade (20) moves from the first slide groove (11) to the second slide groove (12), and when the first telescopic plate (41) is at the first avoidance position, the transmission plane (211) of the first blade (20) moves from the second slide groove (12) to the first slide groove (11).

6. The shutter according to claim 1, characterized in that: The plurality of blades (20) also have a plurality of second open positions at a second preset angle relative to the up and down direction, the second preset angle being greater than the first preset angle, wherein the plurality of second open positions are the same.

7. The shutter according to claim 6, characterized in that: The second preset angle includes a fifth angle, a sixth angle, a seventh angle and an eighth angle of the same angle. The side of the frame (10) is provided with a first slide groove (11) extending along the up-down direction, a sixth slide groove (16) forming the fifth angle with the first slide groove (11), a seventh slide groove (17) forming the sixth angle with the first slide groove (11), an eighth slide groove (18) forming the seventh angle with the first slide groove (11), and a ninth slide groove (19) forming the eighth angle with the first slide groove (11). The sixth slide groove (16), the seventh slide groove (17), the eighth slide groove (18) and the ninth slide groove (19) are all connected to the first slide groove (11). The pivot shaft (21) of each blade (20) has a transmission plane (211). When the transmission plane (211) of each blade (20) moves into the first slide groove (11), the plurality of blades (20) are in the closed position; when the transmission plane (211) of the first blade (20) moves into the sixth slide groove (16), at the same time, the transmission plane (211) of the second blade (20) moves into the seventh slide groove (17), the transmission plane (211) of the third blade (20) moves into the eighth slide groove (18), and the transmission plane (211) of the fourth blade (20) moves into the ninth slide groove (19), the plurality of blades (20) are in the plurality of the second open positions.

8. The shutter according to claim 7, characterized in that: When the transmission plane (211) of the first blade (20) moves into the sixth slide groove (16), The transmission plane (211) of the first blade (20) cooperates with the groove side wall stopper of the sixth slide groove (16); when the transmission plane (211) of the second blade (20) moves into the seventh slide groove (17), The transmission plane (211) of the second blade (20) cooperates with the groove side wall stopper of the seventh slide groove (17); when the transmission plane (211) of the third blade (20) moves into the eighth slide groove (18), The transmission plane (211) of the third blade (20) cooperates with the groove side wall stopper of the eighth slide groove (18); when the transmission plane (211) of the fourth blade (20) moves into the ninth slide groove (19), The transmission plane (211) of the fourth blade (20) cooperates with the groove side wall stopper of the ninth slide groove (19); and / or, The fifth angle, the sixth angle, the seventh angle and the eighth angle are all 90 degrees.

9. The shutter according to claim 7, characterized in that: The sixth slide groove (16), the seventh slide groove (17), the eighth slide groove (18) and the ninth slide groove (19) are all provided with a second telescopic plate (42), and the second telescopic plate (42) has a retracted second avoidance position and an extended second guiding position, wherein when the second telescopic plate (42) is in the second guiding position, the transmission plane (211) of the first blade (20) moves from the first slide groove (11) to the sixth slide groove (16), and when the second telescopic plate (42) is in the second avoidance position, the transmission plane (211) of the first blade (20) moves from the sixth slide groove (16) to the first slide groove (11).

10. A coal mill, comprising a shutter, characterized in that: The shutter is the shutter according to any one of claims 1 to 9.

Images