Tertiary air duct device for cement production system

Abstract

The invention discloses a tertiary air duct device for a cement production system, relates to the technical field of tertiary air ducts, and has the advantage of reducing the impact on the work of the tertiary air duct when replacing a valve plate. The main points of the technical solution are: it includes a first valve plate, a second valve plate, an adjusting pipe, two fixed pipes and a tertiary air duct, the adjusting pipe is installed on the tertiary air duct, the two fixed pipes are installed on the left and right sides of the adjusting pipe and are connected to the adjusting pipe, a turntable is coaxially connected in the two fixed pipes, the first valve plate is located in the adjusting pipe, and the two turntables are both provided with a connecting groove, the left and right ends of the first valve plate pass through the two connecting grooves respectively, the two fixed pipes are provided with a rotating member for driving the turntable to rotate, the second valve plate is located on one side of the two fixed pipes and corresponds to the first valve plate and the connecting groove, and the two fixed pipes are provided with a pushing member for pushing the second valve plate from the connecting groove into the adjusting pipe and pushing the first valve plate out of the adjusting pipe horizontally.

Description

Technical Field

[0001] The invention relates to the technical field of tertiary air ducts, and in particular to a tertiary air duct device for a cement production system. Background Art

[0002] The tertiary air duct is an air delivery duct used for conveying tertiary air to the preheater decomposition furnace for grate cooling. It has a certain heat resistance and can convey high-temperature air volume, which can greatly reduce the heat energy loss of the preheater decomposition furnace and improve the preheater raw material decomposition rate and tertiary air heat energy utilization rate.

[0003] At present, the ventilation area of ​​the tertiary air duct is mostly changed by the valve plate in the valve to adjust the ventilation volume. When the kiln is just started, the valve plate opening is generally 40%-50%; after the kiln is operating normally, the valve plate opening is generally around 70%, that is, 30% of the valve plate is subjected to high-speed erosion of the tertiary air with high dust content and mostly highly abrasive granular clinker dust for a long time, and the wear rate is fast. In addition, the oxidation caused by high temperature further accelerates the wear rate of the valve plate. At present, when the valve plate in the valve on the tertiary air duct is damaged, it is necessary to stop the operation of the tertiary air duct, remove the valve and replace the valve plate, which is inconvenient to use. Therefore, the applicant has developed a new technical solution in the actual production process to solve the above technical problems. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, an object of the present invention is to provide a tertiary air duct device for a cement production system, which has the advantage of reducing the impact on the operation of the tertiary air duct when replacing the valve plate.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a tertiary air duct device for a cement production system, comprising a first valve plate, a second valve plate, an adjusting pipe, two fixed pipes and a tertiary air duct tiltedly arranged on the ground through a bracket, the adjusting pipe is installed and connected to the tertiary air duct, the two fixed pipes are respectively installed on the left and right sides of the adjusting pipe and are both connected to the adjusting pipe, the two fixed pipes are coaxially connected with a turntable, the first valve plate is located in the adjusting pipe, the two turntables are each provided with a connecting groove corresponding to the first valve plate, the left and right ends of the first valve plate respectively pass through the two connecting grooves, the two fixed pipes are provided with a rotating member for driving the turntable to rotate, the second valve plate is located on one side of the two fixed pipes and corresponds to the first valve plate and the connecting groove, the two fixed pipes are provided with a pushing member for pushing the second valve plate from the connecting groove into the adjusting pipe and pushing the first valve plate horizontally out of the adjusting pipe.

[0007] By adopting the above technical solution, the rotating member drives the turntable to rotate, and the turntable drives the first valve plate to rotate through the connecting groove. At this time, the ventilation area of ​​the tertiary air duct can be changed to adjust the ventilation volume. When the first valve plate is damaged and needs to be replaced, it is only necessary to place the second valve plate on one side of the two fixed tubes and correspond to the first valve plate and the connecting groove, and then push the second valve plate from the connecting groove into the regulating tube through the pushing member. At this time, the second valve plate will push the first valve plate horizontally out of the regulating tube until the second valve plate is located in the regulating tube and the first valve plate is completely pushed out of the connecting groove. At this time, the first valve plate can be removed, and when the first valve plate is removed from the regulating tube, the second valve plate will replace the first valve plate to work, reducing the impact on the ventilation volume in the tertiary air duct when replacing the first valve plate;

[0008] Then as time goes by, when the second valve plate in the regulating tube is damaged, a new first valve plate is placed on one side of the two fixed tubes and corresponds to the second valve plate and the connecting groove, and then the new first valve plate is pushed into the regulating tube from the connecting groove through the pushing member. At this time, the new first valve plate will push the second valve plate horizontally out of the regulating tube until the new first valve plate is located in the regulating tube and the second valve plate is completely pushed out of the connecting groove. At this time, the second valve plate can be removed, and when the second valve plate is removed from the regulating tube, the new first valve plate will replace the second valve plate, reducing the impact on the ventilation volume in the tertiary air duct when replacing the second valve plate. By analogy, when replacing the first valve or the second valve located in the regulating tube, the impact on the work of the tertiary air duct can be reduced.

[0009] Preferably, a closing plate is provided on the side of the two turntables facing away from each other, and an installation groove which is consistent with the shape of and connected to the connecting groove is opened on the closing plate, the left and right ends of the first valve plate pass through the two installation grooves respectively, and a sealing layer which contacts the first valve plate is installed on the groove wall of the installation groove.

[0010] Preferably, the pushing member includes a rectangular frame and two fixed plates, one of the fixed plates is arranged at the top ends of the two fixed tubes, and the other fixed plate is arranged at the bottom ends of the two fixed tubes, the adjusting tube, the two fixed tubes and the fixed plate are all located in the rectangular frame, and the upper and lower sides in the rectangular frame are horizontally slidably connected with sliders along the length direction of the rectangular frame, and the slider is fixedly connected to the fixed plate, one of the fixed plates is provided with an electric cylinder for pushing the rectangular frame to move horizontally, and the electric cylinder is staggered with the slider, and the second valve plate is located on one side of the two fixed tubes in the rectangular frame and corresponds to the first valve plate and the connecting groove.

[0011] Preferably, a mounting shaft is rotatably connected between the left and right sides of the rectangular frame, and one end of the mounting shaft passes through the two mounting grooves and the two connecting grooves. The first valve plate includes two vertical plates, and the two vertical plates correspond to each other up and down and are both installed on the mounting shaft by mounting bolts. The second valve plate has the same structure as the first valve plate, and the vertical plate in the second valve plate is installed on the mounting shaft outside the regulating tube by mounting bolts.

[0012] Preferably, a semicircular mounting plate is provided on both of the vertical plates of the first valve plate and the second valve plate, and the mounting plate is installed on the mounting shaft by mounting bolts. A groove is provided on the outer side of the mounting plate, and the bolt head of the mounting bolt is located in the groove, and the two mounting plates form a full circle.

[0013] Preferably, the rotating member comprises a servo motor arranged on a rectangular frame, and one end of a rotating shaft of the servo motor is coaxially connected to the mounting shaft.

[0014] Preferably, a platform is horizontally provided on the lower surface of the adjusting tube through a connecting plate, and a support frame in contact with the ground is provided at the bottom end of the platform, two slide rails are horizontally provided at the top of the platform, and the two slide rails are respectively located on the left and right sides of the adjusting tube, the two slide rails are horizontally slidably connected with a slide seat, and the tops of the two slide seats are vertically provided with a support plate, and one side of the two support plates is provided with a U-shaped support platform that cooperates with the mounting shaft, and the two slide seats are threadedly connected with fastening bolts, and the bottom end of the fastening bolts is tightly pressed against the top of the slide rail.

[0015] Preferably, a mounting box is provided on the upper surface of the regulating tube, and the mounting box is communicated with the regulating tube, and a duct wind speed sensor for detecting the wind speed in the regulating tube is installed in the mounting box.

[0016] Preferably, the closing plate is mounted on the rotating disk by fixing bolts, and a gap is provided between the groove wall of the communicating groove and the first valve plate.

[0017] Preferably, an alkali-resistant brick layer is provided on the inner wall of the tertiary air duct, and a nano-insulation plate is provided between the alkali-resistant brick layer and the inner wall of the tertiary air duct, and the first valve plate and the second valve plate are made of ceramic material.

[0018] The beneficial effects of the present invention are as follows: the rotating disk is driven to rotate by the rotating member, and the rotating disk drives the first valve plate to rotate through the connecting groove, at which time the ventilation area of ​​the tertiary air duct can be changed to adjust the ventilation volume. When the first valve plate is damaged and needs to be replaced, it is only necessary to place the second valve plate on one side of the two fixed tubes and correspond to the first valve plate and the connecting groove, and then push the second valve plate from the connecting groove into the regulating tube through the pushing member. At this time, the second valve plate will push the first valve plate out horizontally from the regulating tube until the second valve plate is located in the regulating tube and the first valve plate is completely pushed out from the connecting groove. At this time, the first valve plate can be removed, and when the first valve plate is removed from the regulating tube, the second valve plate will replace the first valve plate to work, thereby reducing the influence on the ventilation volume in the tertiary air duct when replacing the first valve plate;

[0019] Then as time goes by, when the second valve plate in the regulating tube is damaged, a new first valve plate is placed on one side of the two fixed tubes and corresponds to the second valve plate and the connecting groove, and then the new first valve plate is pushed into the regulating tube from the connecting groove through the pushing member. At this time, the new first valve plate will push the second valve plate horizontally out of the regulating tube until the new first valve plate is located in the regulating tube and the second valve plate is completely pushed out of the connecting groove. At this time, the second valve plate can be removed, and when the second valve plate is removed from the regulating tube, the new first valve plate will replace the second valve plate, reducing the impact on the ventilation volume in the tertiary air duct when replacing the second valve plate. By analogy, when replacing the first valve or the second valve located in the regulating tube, the impact on the work of the tertiary air duct can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of this embodiment;

[0022] Figure 2 This is a schematic diagram of the structure of the platform used to reflect this embodiment;

[0023] Figure 3 This is a schematic diagram of the structure of the fixed pipe in this embodiment;

[0024] Figure 4 This is a schematic diagram of the structure of the turntable in this embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of the rectangular frame in this embodiment;

[0026] Figure 6This is a schematic diagram of the structure of the closing plate of this embodiment;

[0027] Figure 7 This is a schematic diagram of the structure of the first valve plate of this embodiment;

[0028] Figure 8 This is a schematic diagram of the structure of the installation shaft of this embodiment;

[0029] Fig. 9 This is a schematic diagram of the structure of the slide seat in this embodiment;

[0030] Fig.10 This is a schematic diagram of the structure of the support platform in this embodiment;

[0031] Fig.11 This is a schematic diagram when the fracture lines tend to be horizontal;

[0032] Fig.12 This is a schematic diagram when the fracture line tends to be vertical.

[0033] Description of reference numerals:

[0034] In the figure: 1. first valve plate; 2. second valve plate; 3. fixed pipe; 4. tertiary air duct; 5. turntable; 6. connecting groove; 7. closing plate; 8. mounting groove; 9. sealing layer; 10. rectangular frame; 12. fixed plate; 13. slider; 14. electric cylinder; 15. mounting shaft; 16. mounting bolt; 17. mounting plate; 18. groove; 19. servo motor; 20. platform; 21. support frame; 22. slide rail; 23. slide seat; 24. support plate; 25. support table; 26. fastening bolt; 27. mounting box; 28. pipe wind speed sensor; 29. ​​fixing bolt; 30. adjusting pipe; 31. fracture line. DETAILED DESCRIPTION

[0035] 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, not all of the embodiments. 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.

[0036] A tertiary air duct device for a cement production system, such as Figure 1 and Figure 2 and Figure 3, including a first valve plate 1, a second valve plate 2, an adjusting pipe 30, two fixed pipes 3 and a tertiary air duct 4 tiltedly arranged on the ground through a bracket, the adjusting pipe 30 is installed and connected to the tertiary air duct 4, the two fixed pipes 3 are respectively installed on the left and right sides of the adjusting pipe 30 and are connected to the adjusting pipe 30, and a turntable 5 is coaxially connected in the two fixed pipes 3, the first valve plate 1 is located in the adjusting pipe 30, and the two turntables 5 are provided with a connecting groove 6 corresponding to the first valve plate 1, and the left and right ends of the first valve plate 1 pass through the two connecting grooves 6 respectively, and the two fixed pipes 3 are provided with a rotating member for driving the turntable 5 to rotate, the second valve plate 2 is located on one side of the two fixed pipes 3 and corresponds to the first valve plate 1 and the connecting groove 6, and the two fixed pipes 3 are provided with a pushing member for pushing the second valve plate 2 from the connecting groove 6 into the adjusting pipe 30 and pushing the first valve plate 1 out of the adjusting pipe 30 horizontally.

[0037] like Figure 1 and Figure 2 and Figure 3 , the turntable 5 is driven to rotate by the rotating member, and the turntable 5 drives the first valve plate 1 to rotate through the connecting groove 6, at this time, the ventilation volume of the tertiary air duct 4 can be adjusted, when the first valve plate 1 is damaged and needs to be replaced, it is only necessary to place the second valve plate 2 on one side of the two fixed tubes 3 and correspond to the first valve plate 1 and the connecting groove 6, and then push the second valve plate 2 from the connecting groove 6 into the regulating tube 30 through the pushing member, at this time, the second valve plate 2 will push the first valve plate 1 out horizontally from the regulating tube 30 until the second valve plate 2 is located in the regulating tube 30, and the first valve plate 1 is completely pushed out from the connecting groove 6, at this time, the first valve plate 1 can be removed, and when the first valve plate 1 is removed from the regulating tube 30, the second valve plate 2 will replace the first valve plate 1 to work, reducing the impact on the ventilation volume in the tertiary air duct 4 when replacing the first valve plate 1;

[0038] Then, as time goes by, when the second valve plate 2 in the regulating tube 30 is damaged, a new first valve plate 1 is placed on one side of the two fixed tubes 3 and corresponds to the second valve plate 2 and the connecting groove 6, and then the new first valve plate 1 is pushed into the regulating tube 30 from the connecting groove 6 through the pushing member. At this time, the new first valve plate 1 will push the second valve plate 2 out horizontally from the regulating tube 30 until the new first valve plate 1 is located in the regulating tube 30 and the second valve plate 2 is completely pushed out from the connecting groove 6. At this time, the second valve plate 2 can be removed, and when the second valve plate 2 is removed from the regulating tube 30, the new first valve plate 1 will replace the second valve plate 2 to work, reducing the impact of replacing the second valve plate 2 on the ventilation volume in the tertiary air duct 4. By analogy, when replacing the first valve or the second valve located in the regulating tube 30, the impact on the work of the tertiary air duct 4 can be reduced.

[0039] like Figure 5 and Figure 6A closing plate 7 is provided on the side of the two turntables 5 facing away from each other, and a mounting groove 8 which is consistent with the shape of and connected to the connecting groove 6 is opened on the closing plate 7. The left and right ends of the first valve plate 1 pass through the two mounting grooves 8 respectively. A sealing layer 9 which contacts the first valve plate 1 is installed on the groove wall of the mounting groove 8. The purpose of this arrangement is to seal the first valve plate 1 and the groove wall of the mounting groove 8 through the sealing layer 9 on the groove wall of the mounting groove 8.

[0040] The sealing layer 9 can be made of the material of the sealing layer in the tertiary air duct valve with application number CN200520100346.5: heat-insulating refractory ceramic plate or other sealing materials.

[0041] like Figure 3 and Figure 4 The pushing member includes a rectangular frame 10 and two fixed plates 12, wherein one of the fixed plates 12 is arranged at the top ends of the two fixed tubes 3, and the other fixed plate 12 is arranged at the bottom ends of the two fixed tubes 3. The adjusting tube 30, the two fixed tubes 3, and the fixed plate 12 are all located in the rectangular frame 10, and the upper and lower sides in the rectangular frame 10 are horizontally slidably connected with sliders 13 along the length direction of the rectangular frame 10, and the sliders 13 are fixedly connected to the fixed plates 12, and one of the fixed plates 12 is provided with an electric cylinder 14 for pushing the rectangular frame 10 to move horizontally, and the electric cylinder 14 is misaligned with the slider 13, and the second valve plate 2 is located on one side of the two fixed tubes 3 in the rectangular frame 10 and corresponds to the first valve plate 1 and the connecting groove 6.

[0042] like Figure 3 and Figure 4 and Figure 5 , by placing the second valve plate 2 on one side of the two fixed tubes 3 in the rectangular frame 10, and making the second valve plate 2 contact with the first valve plate 1 accordingly, and then opening the electric cylinder 14, the piston rod of the electric cylinder 14 pushes the rectangular frame 10 to move horizontally, so that one side of the inner wall of the rectangular frame 10 contacts with the second valve plate 2, and pushes the second valve plate 2 close to the regulating tube 30, at this time, the second valve plate 2 will enter the mounting groove 8 and push the first valve plate 1 to move, until the second valve plate 2 replaces the first valve plate 1 and is located in the regulating tube 30, and the sealing layers 9 in the mounting grooves 8 on the two closing plates 7 are in conflict with the second valve plate 2, at this time, the first valve plate 1 can be removed, which is simple and convenient to use.

[0043] like Figure 5 and Figure 7The left and right sides of the rectangular frame 10 are rotatably connected with a mounting shaft 15. At this time, one end of the mounting shaft 15 passes through the two mounting grooves 8 and the two connecting grooves 6. The first valve plate 1 includes two vertical plates, and the two vertical plates correspond to each other and are both mounted on the mounting shaft 15 by mounting bolts 16. The second valve plate 2 has the same structure as the first valve plate 1, and the vertical plate in the second valve plate 2 is mounted on the mounting shaft 15 outside the regulating tube 30 by mounting bolts 16. The purpose of this setting is to mount the second valve plate 2 by mounting bolts 16. The vertical plate in the regulating tube 30 is installed on the installation shaft 15 outside the regulating tube 30, and the vertical plate in the second valve plate 2 is aligned with the vertical plate in the first valve plate 1. At this time, the second valve plate 2 is located on the left side of the regulating tube 30, and then the rectangular frame 10 moves to the right. At this time, the installation shaft 15 will push the second valve plate 2 into the regulating tube 30 and the two fixed tubes 3, and push the first valve plate 1 to the right. At this time, the first valve plate 1 can be removed from the regulating tube 30, and then the installation bolts 16 used to install the first valve plate 1 can be removed to remove the first valve plate 1;

[0044] Then, when the second valve plate 2 in the regulating tube 30 is damaged, a new first valve plate 1 is installed on the mounting shaft 15 through the mounting bolts 16. At this time, the new first valve plate 1 is located on the right side of the regulating tube 30. Then, the rectangular frame 10 moves to the left, and the new first valve plate 1 is pushed into the regulating tube 30 and the two fixed tubes 3 through the mounting shaft 15, and the second valve plate 2 is pushed out. At this time, the second valve plate 2 can be removed from the regulating tube 30. Then, the mounting bolts 16 used to install the second valve plate 2 can be removed to remove the second valve plate 2. Through the above process, when the damaged first valve plate 1 or the second valve plate 2 is pushed out of the regulating tube 30, the first valve plate 1 or the second valve plate 2 will not fall directly, causing a safety hazard, and the mounting shaft 15 facilitates the alignment of the vertical plate in the second valve plate 2 with the vertical plate in the first valve plate 1.

[0045] When the first valve plate 1 in the regulating pipe 30 is damaged and fractured, that is, the fracture line 31 tends to be horizontal or vertical (such as Fig.11 and Fig.12 ), because the first valve plate 1 located in the regulating tube 30 is installed on the mounting shaft 15 by the mounting bolts 16, and the two ends of the first valve plate 1 in the regulating tube 30 are respectively located in the mounting grooves 8 on the two closing plates 7, and the sealing layer 9 in the mounting grooves 8 is in conflict with the first valve plate 1, so when the fracture line 31 tends to be horizontal or vertical, the fractured first valve plate 1 will not fall into the regulating tube 30, and the second valve plate 2 can still be pushed into the regulating tube 30 horizontally. Fig.11 and Fig.12 The first valve plate 1 that is broken is pushed out of the regulating pipe 30 .

[0046] like Figure 4 and Figure 7A semicircular mounting plate 17 is provided on both vertical plates of the first valve plate 1 and the second valve plate 2, and the mounting plate 17 is mounted on the mounting shaft 15 by means of mounting bolts 16. A groove 18 is provided on the outer side of the mounting plate 17, and the bolt head of the mounting bolt 16 is located in the groove 18. The two mounting plates 17 form a full circular ring. The purpose of this arrangement is that the mounting plates 17 on the two vertical plates form a full circular ring when they are mounted on the mounting shaft 15. At this time, the mounting shaft 15 can be protected by the mounting plates 17 on the vertical plates, thereby reducing damage to the mounting shaft 15 in the regulating tube 30.

[0047] like Figure 3 and Figure 4 and Figure 5 The rotating member includes a servo motor 19 arranged on the rectangular frame 10, and one end of the rotating shaft of the servo motor 19 is coaxially connected to the mounting shaft 15. The purpose of this arrangement is that when it is necessary to drive the turntable 5 to rotate, only the servo motor 19 needs to be turned on, and the rotating shaft of the servo motor 19 drives the mounting shaft 15 to rotate. At this time, the mounting shaft 15 will drive the vertical plate to rotate through the mounting plate 17 in the first valve plate 1 in the regulating tube 30, and the vertical plate will drive the closing plate 7 to rotate through the mounting groove 8. The closing plate 7 will drive the turntable 5 to rotate in the fixed tube 3 along the axis of the fixed tube 3. The rotation axis of the turntable 5 coincides with the rotation axis of the mounting shaft 15. At this time, the ventilation volume of the tertiary air duct 4 can be adjusted by the two vertical plates located in the regulating tube 30 and rotating along the axis of the mounting shaft 15.

[0048] like Figure 1 and Figure 2 and Fig.10 A platform 20 is horizontally provided on the lower surface of the adjusting tube 30 through a connecting plate, and a support frame 21 in contact with the ground is provided at the bottom end of the platform 20, and two slide rails 22 are horizontally provided at the top of the platform 20, and the two slide rails 22 are respectively located on the left and right sides of the adjusting tube 30, and the two slide rails 22 are horizontally slidably connected with slide seats 23, and the top ends of the two slide seats 23 are vertically provided with support plates 24, and one side of the two support plates 24 is provided with a U-shaped support platform 25 that cooperates with the mounting shaft 15, and the two slide seats 23 are threadedly connected with fastening bolts 26, and the bottom ends of the fastening bolts 26 are tightly pressed against the top ends of the slide rails 22.

[0049] like Figure 8 , the mounting shaft 15 outside the regulating tube 30 corresponds to one of the support platforms 25. When the first valve plate 1 is not damaged, loosen the fastening bolts 26, and then push the support platform 25 corresponding to the mounting shaft 15 close to the mounting shaft 15. At this time, the support platform 25 will drive the slide seat 23 to move on the slide rail 22 through the support plate 24 until the mounting shaft 15 outside the regulating tube 30 is located in the support platform 25 (such as Fig. 9), and then tighten the fastening bolts 26 so that the slide seat 23 cannot slide on the slide rail 22. At this time, the mounting shaft 15 can be supported by the support platform 25;

[0050] When the first valve plate 1 is damaged and the second valve plate 2 needs to be installed on the mounting shaft 15 outside the regulating tube 30, first loosen the fastening bolts 26, and then push the support platform 25 away from the mounting shaft 15 and move it to a suitable position (such as Figure 3 ), and then install the second valve plate 2 on the mounting shaft 15 located outside the regulating tube 30, and then when the second valve plate 2 on the mounting shaft 15 is located in the regulating tube 30 to replace the first valve plate 1, and the first valve plate 1 is moved out of the regulating tube 30, and the first valve plate 1 is removed from the mounting shaft 15, the mounting shaft 15 after the first valve plate 1 is removed can be supported by cooperating with another support platform 25, the slide seat 23, the slide rail 22 and the support plate 24, thereby improving the stability of the mounting shaft 15 during rotation.

[0051] like Figure 4 A mounting box 27 is provided on the upper surface of the regulating tube 30, and the mounting box 27 is connected to the regulating tube 30. A duct wind speed sensor 28 for detecting the wind speed in the regulating tube 30 is installed in the mounting box 27. The purpose of this setting is that the wind speed passing through the regulating tube 30 can be detected by the duct wind speed sensor 28, which is simple and convenient to use.

[0052] like Figure 5 and Figure 6 The closing plate 7 is mounted on the turntable 5 by means of fixing bolts 29, and there is a gap between the groove wall of the connecting groove 6 and the first valve plate 1. The purpose of this arrangement is that when the first valve plate 1 located in the regulating tube 30 is bent and the second valve plate 2 is mounted on the mounting shaft 15 and is located on the left side of the regulating tube 30, the closing plate 7 is first removed by means of the fixing bolts 29, and then the second valve plate 2 replaces the first valve plate 1 by means of the mounting shaft 15 moving to the right. At this time, the bent first valve plate 1 will move out of the regulating tube 30 from the connecting groove 6, thereby reducing the situation in which the first valve plate 1 cannot move to the right out of the regulating tube 30 due to the bending of the first valve plate 1.

[0053] An alkali-resistant brick layer (not shown in the figure) is provided on the inner wall of the tertiary air duct 4, and a nano-insulation board (not shown in the figure) is provided between the alkali-resistant brick layer and the inner wall of the tertiary air duct 4. The first valve plate 1 and the second valve plate 2 are made of ceramic material. The alkali-resistant brick layer can withstand high temperature and is not easily deformed and cracked by heat. The nano-insulation board can more effectively prevent heat loss in the tertiary air duct and improve the insulation effect.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A tertiary air duct device for a cement production system, characterized in that: The invention comprises a first valve plate (1), a second valve plate (2), a regulating pipe (30), two fixed pipes (3), and a tertiary air duct (4) tiltedly arranged on the ground by a bracket, wherein the regulating pipe (30) is installed and connected to the tertiary air duct (4), the two fixed pipes (3) are respectively installed on the left and right sides of the regulating pipe (30) and are both connected to the regulating pipe (30), a rotating disk (5) is coaxially connected to the two fixed pipes (3), the first valve plate (1) is located in the regulating pipe (30), and the two rotating disks (5) are each provided with a rotating disk (5) connected to the first valve plate (1). The valve plate (1) has a connecting groove (6) corresponding to the connecting groove (6), the left and right ends of the first valve plate (1) respectively pass through the two connecting grooves (6), the two fixed tubes (3) are provided with a rotating member for driving the rotating disk (5) to rotate, the second valve plate (2) is located on one side of the two fixed tubes (3) and corresponds to the first valve plate (1) and the connecting groove (6), and the two fixed tubes (3) are provided with a pushing member for pushing the second valve plate (2) from the connecting groove (6) into the regulating tube (30) and pushing the first valve plate (1) out of the regulating tube (30) horizontally.

2. The tertiary air duct device for a cement production system according to claim 1, characterized in that: A closing plate (7) is provided on the side of the two rotating disks (5) facing away from each other, and a mounting groove (8) having the same shape as and connected to the connecting groove (6) is provided on the closing plate (7), and the left and right ends of the first valve plate (1) respectively pass through the two mounting grooves (8), and a sealing layer (9) that contacts the first valve plate (1) is installed on the groove wall of the mounting groove (8).

3. The tertiary air duct device for a cement production system according to claim 2, characterized in that: The pushing member comprises a rectangular frame (10) and two fixed plates (12), wherein one of the fixed plates (12) is arranged at the top ends of the two fixed tubes (3), and the other fixed plate (12) is arranged at the bottom ends of the two fixed tubes (3). The adjusting tube (30), the two fixed tubes (3) and the two fixed plates (12) are all located in the rectangular frame (10), and the upper and lower sides in the rectangular frame (10) are connected with sliders (13) in a horizontal sliding manner along the length direction of the rectangular frame (10), and the sliders (13) are fixedly connected to the fixed plates (12). An electric cylinder (14) for pushing the rectangular frame (10) to move horizontally is provided on one of the fixed plates (12), and the electric cylinder (14) is offset from the slider (13). The second valve plate (2) is located on one side of the two fixed tubes (3) in the rectangular frame (10) and corresponds to the first valve plate (1) and the connecting groove (6).

4. The tertiary air duct device for a cement production system according to claim 3, characterized in that: A mounting shaft (15) is rotatably connected between the left and right sides of the rectangular frame (10), and one end of the mounting shaft (15) passes through the two mounting grooves (8) and the two connecting grooves (6). The first valve plate (1) includes two vertical plates, and the two vertical plates correspond to each other in the upper and lower parts and are both mounted on the mounting shaft (15) by means of mounting bolts (16). The second valve plate (2) has the same structure as the first valve plate (1), and the vertical plates in the second valve plate (2) are mounted on the mounting shaft (15) located outside the regulating tube (30) by means of mounting bolts (16).

5. The tertiary air duct device for a cement production system according to claim 4, characterized in that: A semicircular mounting plate (17) is provided on both of the vertical plates of the first valve plate (1) and the second valve plate (2), and the mounting plate (17) is mounted on the mounting shaft (15) via mounting bolts (16). A groove (18) is provided on the outer side of the mounting plate (17), and the bolt head of the mounting bolt (16) is located in the groove (18), so that the two mounting plates (17) form a full circular ring.

6. The tertiary air duct device for a cement production system according to claim 3, characterized in that: The rotating member comprises a servo motor (19) arranged on a rectangular frame (10), and one end of a rotating shaft of the servo motor (19) is coaxially connected to the mounting shaft (15).

7. The tertiary air duct device for a cement production system according to claim 5, characterized in that: The lower surface of the adjusting tube (30) is horizontally provided with a platform (20) through a connecting plate, and the bottom end of the platform (20) is provided with a support frame (21) in contact with the ground, and the top end of the platform (20) is provided with two slide rails (22) horizontally, and the two slide rails (22) are respectively located on the left and right sides of the adjusting tube (30), and the two slide rails (22) are horizontally slidably connected with a slide seat (23), and the top ends of the two slide seats (23) are vertically provided with a support plate (24), and one side of the two support plates (24) is provided with a U-shaped support platform (25) matched with the mounting shaft (15), and the two slide seats (23) are threadedly connected with a fastening bolt (26), and the bottom end of the fastening bolt (26) is tightly pressed against the top end of the slide rail (22).

8. The tertiary air duct device for a cement production system according to claim 1, characterized in that: A mounting box (27) is provided on the upper surface of the regulating tube (30), and the mounting box (27) is in communication with the regulating tube (30). A duct wind speed sensor (28) for detecting wind speed in the regulating tube (30) is installed in the mounting box (27).

9. The tertiary air duct device for a cement production system according to claim 2, characterized in that: The closing plate (7) is mounted on the rotating disk (5) via fixing bolts (29), and a gap is provided between the groove wall of the connecting groove (6) and the first valve plate (1).

10. The tertiary air duct device for a cement production system according to claim 1, characterized in that: An alkali-resistant brick layer is provided on the inner wall of the tertiary air duct (4), and a nano heat insulation plate is provided between the alkali-resistant brick layer and the inner wall of the tertiary air duct (4); the first valve plate (1) and the second valve plate (2) are made of ceramic material.

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