Device to solve the problem of long and thick kiln skin with inverted cone in main firing of cement rotary kiln

Abstract

The present application relates to a device for solving the problem of long and thick kiln skin with inverted cone shape in the main firing zone of cement rotary kiln, and relates to the technical field of cement calcination, which comprises a base, on which a cement rotary kiln is rotatably mounted, the cement rotary kiln is tiltedly mounted, the cement rotary kiln is connected to a driving mechanism, the driving mechanism is used to drive the cement rotary kiln to rotate, a knocking mechanism is provided on the base, the knocking mechanism is used to knock the cement rotary kiln, a displacement mechanism is provided on the base, the displacement mechanism is connected to a pulverized coal burner, and the pulverized coal burner can be extended from the lower end of the cement rotary kiln. The present application has the effect of increasing the hourly output of the cement rotary kiln.

Description

Technical Field

[0001] The present application relates to the technical field of cement calcination, and in particular to a device for solving the problem of long and thick inverted conical kiln skin in the main firing zone of a cement rotary kiln. Background Art

[0002] In the process of cement clinker calcination, the cement rotary kiln is lined with refractory bricks to protect the cylinder. When the raw materials entering the kiln are preheated by the preheater and decomposed by the decomposition furnace, they enter the cement rotary kiln. Due to the certain angle of the cement rotary kiln and its continuous rotation, the raw materials entering the kiln continuously move toward the kiln head. The high-temperature flame heat generated by the pulverized coal burner transfers heat to the raw materials entering the kiln through convection and radiation heat transfer, so that the temperature of the raw materials entering the kiln continues to rise to about 1250℃, and then a certain amount of liquid phase appears. The appearance of this liquid phase provides the necessary conditions for the final calcination and formation of the core minerals in the cement clinker. Due to the heat loss on the surface of the cement rotary kiln cylinder, in order to achieve dynamic heat balance during the production process, part of the certain amount of liquid phase that appears in the former will solidify and adhere to the surface of the refractory bricks to form a preliminary kiln skin. As the production continues, the thickness of the kiln skin will continue to increase. When the dynamic thermal equilibrium is reached, the thickness of the kiln lining will be in a dynamic range of increase and decrease, and the kiln lining can protect the refractory bricks and transfer heat during the calcination of cement clinker.

[0003] The types of raw materials currently used in the production of cement clinker, especially the use of industrial waste slag for raw material batching, will change the properties and amount of the liquid phase during the calcination of cement clinker due to the increase of harmful components in various raw materials, and will generate a long and thick inverted cone kiln skin, which will affect the hourly output of the cement rotary kiln. Summary of the invention

[0004] In order to improve the hourly output of a cement rotary kiln, the present application provides a device for solving the problem of an inverted conical long and thick kiln skin of a main firing zone of a cement rotary kiln.

[0005] The present application provides a device for solving the problem of long and thick inverted conical kiln skin in the main firing zone of cement rotary kiln, which adopts the following technical solution: A device for solving the problem of long and thick kiln skin with inverted cone shape in the main firing zone of cement rotary kiln comprises a base, on which a cement rotary kiln is rotatably mounted, the cement rotary kiln is tiltedly mounted, the cement rotary kiln is connected to a driving mechanism, the driving mechanism is used to drive the cement rotary kiln to rotate, a knocking mechanism is arranged on the base, the knocking mechanism is used to knock the cement rotary kiln, a displacement mechanism is arranged on the base, the displacement mechanism is connected to a pulverized coal burner, the pulverized coal burner can extend from the lower end of the cement rotary kiln, and the displacement mechanism comprises: A mounting rod, the mounting rod being fixedly mounted on the base; A first electro-hydraulic push rod, wherein a fixed end of the first electro-hydraulic push rod is fixedly mounted on an end of the mounting rod away from the base; A second electro-hydraulic push rod, wherein the fixed end of the second electro-hydraulic push rod is fixedly connected to the movable end of the first electro-hydraulic push rod, and the displacement direction of the movable end of the second electro-hydraulic push rod is perpendicular to the displacement direction of the movable end of the first electro-hydraulic push rod, and both are parallel to the horizontal plane; An adjusting component, wherein the adjusting component is connected to the second electro-hydraulic push rod, the adjusting component is connected to the pulverized coal burner, and the adjusting component is used to adjust the height of the flame spraying end of the pulverized coal burner.

[0006] By adopting the above technical scheme, the first electro-hydraulic push rod is controlled so that the pulverized coal burner can move in the horizontal direction, so as to control the distance between the flame-spraying end of the pulverized coal burner and the lower end of the cement rotary kiln and thus control the length of the kiln skin; the second electro-hydraulic push rod is controlled to adjust the horizontal distance between the flame-spraying end of the pulverized coal burner and the material in the cement rotary kiln, and the control adjustment component is controlled to adjust the vertical distance between the flame-spraying end of the pulverized coal burner and the material in the cement rotary kiln, so as to control the thickness of the kiln skin in the cement rotary kiln. By controlling the length and thickness of the kiln skin, the inverted cone-shaped long and thick kiln skin of the main firing zone of the cement rotary kiln is cleaned, which is beneficial to increase the hourly output of the cement rotary kiln.

[0007] Optionally, the adjustment component includes: a third electro-hydraulic push rod, wherein the fixed end of the third electro-hydraulic push rod is fixedly connected to the movable end of the second electro-hydraulic push rod, and the movable end of the third electro-hydraulic push rod is hinged to the pulverized coal burner; A fourth electro-hydraulic push rod, wherein the fixed end of the fourth electro-hydraulic push rod is fixedly connected to the movable end of the second electro-hydraulic push rod, and the movable end of the fourth electro-hydraulic push rod is hinged to the pulverized coal burner.

[0008] By adopting the above technical solution, when the third electro-hydraulic push rod is extended and retracted, it drives the end of the pulverized coal burner away from the flame-spraying end to rise or fall, so that the flame-spraying end of the pulverized coal burner is lowered or raised, thereby adjusting the vertical distance between the flame-spraying end of the pulverized coal burner and the material in the cement rotary kiln, thereby realizing the control of the kiln skin thickness, which is beneficial to increasing the hourly output of the cement rotary kiln.

[0009] Optionally, the driving mechanism includes: A motor, wherein the motor is fixedly mounted on the base and is arranged in parallel with the cement rotary kiln; A first gear, the first gear is coaxially fixedly connected to the output end of the motor; The second gear is coaxially fixedly connected to the outer wall of the cement rotary kiln, and the first gear is meshed with the second gear.

[0010] By adopting the above technical solution, the motor drives the first gear, the first gear drives the second gear, and the second gear drives the cement rotary kiln to rotate. The inclined cement rotary kiln rotates so that the material in the cement rotary kiln is always in a fixed quadrant, which is beneficial to improving the hourly output of the cement rotary kiln.

[0011] Optionally, the knocking mechanism includes: A limiting rod, the limiting rod is connected to the base; A knocking block, the knocking block is slidably mounted on the limiting rod; A transmission assembly is connected to the knocking block, the transmission assembly is connected to the second gear, and the transmission assembly is used to drive the knocking block to move.

[0012] By adopting the above technical solution, the second gear drives the transmission assembly to operate, and the operation of the transmission assembly causes the knocking block to slide along the limit rod. When the knocking block slides to abut against the outer wall of the cement rotary kiln, the cement rotary kiln is knocked to accelerate the falling of the kiln skin, which is beneficial to increase the hourly output of the cement rotary kiln.

[0013] Optionally, the transmission assembly includes: a third gear, the third gear being rotatably connected to the base and meshing with the second gear; a fourth gear, the fourth gear being rotatably connected to the base, and the third gear being meshed with the fourth gear; A fixing rod, the fixing rod being fixedly mounted on a side wall of the fourth gear, the fixing rod being eccentrically arranged with the fourth gear; The fixing rod is passed through and rotatably mounted on one end of the connecting rod, and the other end of the connecting rod is hinged to the knocking block.

[0014] By adopting the above technical solution, the second gear drives the third gear, the third gear drives the fourth gear, the fourth gear drives the fixed rod, the fixed rod drives the connecting rod, and the connecting rod drives the knocking block to slide along the limit rod. At the same time, the addition of the third gear enables the setting of the fixed rod to be as far away from the axis of the fourth gear as possible, which is conducive to increasing the stroke of the knocking block, further increasing the knocking force, accelerating the falling of the kiln skin, and further improving the hourly output of the cement rotary kiln.

[0015] Optionally, the limiting rod is slidably connected to the base, the fixing rod is a telescopic structure, and the sliding direction of the limiting rod is the same as the telescopic direction of the fixing rod.

[0016] By adopting the above technical solution, the fixing rod is set as a hydraulic telescopic rod so that the limit rod and the knocking block can move, and the side walls of the cement rotary kiln at different positions are knocked, which accelerates the falling of the kiln skin and further improves the hourly output of the cement rotary kiln.

[0017] Optionally, the rod cavity of the first electro-hydraulic push rod is connected to the rod cavity of the fixed rod.

[0018] By adopting the above technical solution, when the first electro-hydraulic push rod moves, the hydraulic oil in the rod cavity of the first electro-hydraulic push rod enters the rod cavity of the fixed rod, pushing the movable end of the fixed rod to move toward the fixed end, and the knocking block moves with the pulverized coal burner, so that the knocking block always knocks on the position of the outer wall of the cement rotary kiln where the kiln lining burned by the pulverized coal burner is attached, thereby accelerating the falling of the kiln lining and further improving the hourly output of the cement rotary kiln.

[0019] Optionally, a high temperature resistant rubber pad is fixedly mounted on one end of the knocking block close to the cement rotary kiln.

[0020] By adopting the above technical solution, the deformation of the knocking block when knocking the outer wall of the cement rotary kiln can be reduced, which is beneficial to extending the service life of the knocking block.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: By controlling the first electro-hydraulic push rod, the pulverized coal burner can be moved in the horizontal direction to control the distance between the pulverized coal burner's flame spraying end and the lower end of the cement rotary kiln, thereby controlling the kiln skin length; controlling the second electro-hydraulic push rod to adjust the distance between the pulverized coal burner's flame spraying end and the horizontal distance between the material in the cement rotary kiln, and controlling the adjustment component to adjust the distance between the pulverized coal burner's flame spraying end and the material in the cement rotary kiln vertically, thereby controlling the kiln skin thickness in the cement rotary kiln. By controlling the length and thickness of the kiln skin, the inverted conical long and thick kiln skin of the main firing zone of the cement rotary kiln is cleaned, which is beneficial to improving the hourly output of the cement rotary kiln; The second gear drives the third gear, the third gear drives the fourth gear, the fourth gear drives the fixed rod, the fixed rod drives the connecting rod, and the connecting rod drives the knocking block to slide along the limit rod. At the same time, the addition of the third gear enables the setting of the fixed rod to be as far away from the axis of the fourth gear as possible, which is conducive to increasing the stroke of the knocking block, further increasing the knocking force, accelerating the falling of the kiln skin, and further improving the hourly output of the cement rotary kiln; When the first electro-hydraulic push rod moves, the hydraulic oil in the rod cavity of the first electro-hydraulic push rod enters the rod cavity of the fixed rod, pushing the movable end of the fixed rod to move toward the fixed end, and the knocking block moves with the pulverized coal burner, so that the knocking block always knocks on the outer wall of the cement rotary kiln where the kiln lining burned by the pulverized coal burner is attached, thereby accelerating the falling of the kiln lining and further improving the hourly output of the cement rotary kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0023] Description of reference numerals: 1. Base; 11. Cement rotary kiln; 12. Pulverized coal burner; 2. driving mechanism; 21. motor; 22. first gear; 23. second gear; 31. Limit rod; 32. Knocking block; 33. Transmission assembly; 331. Third gear; 332. Fourth gear; 333. Fixed rod; 334. Connecting rod; 41. mounting rod; 42. first electro-hydraulic push rod; 43. second electro-hydraulic push rod; 44. adjustment assembly; 441. third electro-hydraulic push rod; 442. fourth electro-hydraulic push rod; 5. High temperature resistant rubber pad. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 This application is described in further detail.

[0025] The embodiment of the present application discloses a device for solving the problem of long and thick inverted conical kiln skin in the main firing zone of cement rotary kiln.

[0026] Reference Figure 1 The device for solving the problem of the main firing of cement rotary kiln with inverted cone-shaped long and thick kiln skin includes a base 1, on which a cement rotary kiln 11 is rotatably installed, and the cement rotary kiln 11 is tiltedly installed with an inclination angle of 4°; the cement rotary kiln 11 is connected to a driving mechanism 2, and the driving mechanism 2 is used to drive the cement rotary kiln 11 to rotate; the base 1 is connected to a knocking mechanism, and the knocking mechanism is used to knock the cement rotary kiln 11, and a displacement mechanism is arranged on the base 1, and the displacement mechanism is connected to a pulverized coal burner 12, and the pulverized coal burner 12 is a low-nitrogen pulverized coal burner 12, and the pulverized coal burner 12 can extend from the lower end of the cement rotary kiln 11.

[0027] Reference Figure 1The mounting mechanism includes a mounting rod 41, which is fixedly mounted on the base 1; a fixed end of a first electro-hydraulic push rod 42 is fixedly mounted on one end of the mounting rod 41 away from the base 1, and a movable end of the first electro-hydraulic push rod 42 is fixedly connected to a fixed end of a second electro-hydraulic push rod 43, and a displacement direction of the movable end of the second electro-hydraulic push rod 43 is perpendicular to that of the movable end of the first electro-hydraulic push rod 42, and both are parallel to the horizontal plane; the second electro-hydraulic push rod 43 is connected to an adjusting component 44, and the adjusting component 44 is connected to the pulverized coal burner 12, and the adjusting component 44 is used to adjust the height of the nozzle end of the pulverized coal burner 12.

[0028] Before use, the pulverized coal fed into the pulverized coal burner 12 is first crushed to a fineness of 7-8 meshes, the inner wind of the pulverized coal burner 12 is adjusted to 250m / s, the outer wind is adjusted to 310m / s, and the coal supply wind is adjusted to 24-25m / s, so that the pulverized coal can be fully burned. Both the inner and outer winds are supplied by separate Roots blowers, which facilitates the precise adjustment of the inner and outer winds. When in use, the pulverized coal burner 12 can be moved in the horizontal direction by controlling the first electro-hydraulic push rod 42 to control the distance between the pulverized coal burner 12 and the lower end of the cement rotary kiln 11. When the pulverized coal burner 12 is within the lower end of the cement rotary kiln 11, the surface temperature of the cement rotary kiln 11 rises, and the inverted cone kiln skin will break under the burning of the flame and fall into the cement rotary kiln 11, achieving the effect of controlling the length of the kiln skin. Therefore, the kiln skin can be controlled in the length direction by controlling the distance between the pulverized coal burner 12 and the lower end of the cement rotary kiln 11. The second electro-hydraulic push rod 43 is used to control the distance between the flame spraying end of the pulverized coal burner 12 and the material level in the cement rotary kiln 11. The greater the distance between the flame of the pulverized coal burner 12 and the material in the cement rotary kiln 11, and the smaller the distance from the kiln skin, the thinner the kiln skin thickness in the cement rotary kiln 11. The adjustment component 44 can adjust the vertical distance between the flame spraying end of the pulverized coal burner 12 and the material in the cement rotary kiln 11. The greater the distance between the flame of the pulverized coal burner 12 and the material in the cement rotary kiln 11, and the smaller the distance from the kiln skin, the thinner the kiln skin thickness in the cement rotary kiln 11. By controlling the length and thickness of the kiln skin, the cleaning of the inverted conical long and thick kiln skin of the main firing zone of the cement rotary kiln is achieved.

[0029] Reference Figure 1 The adjustment component 44 includes a third electro-hydraulic push rod 441, a fixed end of the third electro-hydraulic push rod 441 is fixedly connected to the movable end of the second electro-hydraulic push rod 43, and the movable end of the third electro-hydraulic push rod 441 is hinged to the pulverized coal burner 12; the pulverized coal burner 12 is hinged with the movable end of the fourth electro-hydraulic push rod 442, and the fixed end of the fourth electro-hydraulic push rod 442 is fixedly connected to the movable end of the second electro-hydraulic push rod 43, and the connecting direction of the third electro-hydraulic push rod 441 and the fourth electro-hydraulic push rod 442 is the same as the telescopic direction of the first electro-hydraulic push rod 42.

[0030] When in use, when the third electro-hydraulic push rod 441 is extended and retracted, the end of the pulverized coal burner 12 away from the flame-spraying end is driven to rise or fall, and at the same time, the pulverized coal burner 12 will rotate around the position where it is hinged with the fourth electro-hydraulic push rod 442, so that the flame-spraying end of the pulverized coal burner 12 is lowered or raised, so as to achieve the effect of controlling the vertical distance between the flame-spraying end of the pulverized coal burner 12 and the material in the cement rotary kiln 11. In addition, the fourth electro-hydraulic push rod 442 and the third electro-hydraulic push rod 441 are extended and retracted in opposite directions to increase the control range.

[0031] Reference Figure 1 The driving mechanism 2 includes a motor 21, which is fixedly mounted on the base 1 and arranged parallel to the cement rotary kiln 11; a first gear 22 is coaxially fixedly connected to the output end of the motor 21; a second gear 23 is coaxially fixedly mounted on the outer wall of the cement rotary kiln 11, and the first gear 22 is meshed with the second gear 23.

[0032] When in use, the motor 21 drives the first gear 22 to rotate, the first gear 22 drives the second gear 23 to rotate, and the second gear 23 drives the cement rotary kiln 11 to rotate. The inclined cement rotary kiln 11 rotates so that the material in the cement rotary kiln 11 is always in a fixed quadrant.

[0033] Reference Figure 1 The knocking mechanism includes a limit rod 31, which is connected to the base 1; a knocking block 32 is slidably mounted on the limit rod 31; the knocking block 32 is connected to a transmission assembly 33, which is connected to the second gear 23, and the transmission assembly 33 is used to drive the knocking block 32 to move.

[0034] When in use, the second gear 23 drives the transmission assembly 33 to operate, and the operation of the transmission assembly 33 enables the knocking block 32 to slide along the length direction of the limit rod 31. When the knocking block 32 slides to abut against the outer wall of the cement rotary kiln 11, the cement rotary kiln 11 is knocked to accelerate the falling of the kiln skin.

[0035] Reference Figure 1 The transmission assembly 33 includes a third gear 331, which is rotatably connected to the base 1 and meshes with the second gear 23; the third gear 331 meshes with the fourth gear 332, and the fourth gear 332 is rotatably connected to the base 1; a fixing rod 333 is fixedly installed on the side wall of the fourth gear 332, and the fixing rod 333 and the fourth gear 332 are eccentrically arranged; a connecting rod 334 is penetrated and rotatably installed on the fixing rod 333, and the end of the connecting rod 334 away from the fixing rod 333 is hinged to the knocking block 32.

[0036] When in use, the second gear 23 drives the third gear 331 to rotate, the third gear 331 rotates to drive the fourth gear 332 to rotate, the fourth gear 332 rotates to drive the fixed rod 333 to rotate, the fixed rod 333 rotates to drive the connecting rod 334 to move, and the connecting rod 334 moves to drive the knocking block 32 to slide along the limit rod 31. At the same time, the addition of the third gear 331 allows the setting of the fixed rod 333 to be as far away from the axis of the fourth gear 332 as possible, which is conducive to increasing the stroke of the knocking block 32 and further increasing the knocking force.

[0037] Reference Figure 1 The limiting rod 31 is slidably connected to the base 1 , the fixing rod 333 is a hydraulic telescopic rod, and the movable direction of the limiting rod 31 is the same as the telescopic direction of the fixing rod 333 .

[0038] The fixing rod 333 is configured as a hydraulic telescopic rod so that the limiting rod 31 and the knocking block can move to knock the side walls of the cement rotary kiln 11 at different positions.

[0039] Reference Figure 1 The rod cavity of the first electro-hydraulic push rod 42 is connected to the rod cavity of the fixed rod 333.

[0040] In the initial state, the flame-spraying end of the pulverized coal burner 12 and the knocking block 32 are arranged on the same vertical line. When the first electro-hydraulic push rod 42 moves, the hydraulic oil in the rod cavity of the first electro-hydraulic push rod 42 enters the rod cavity of the fixed rod 333, pushing the movable end of the fixed rod 333 to move toward the fixed end, and the knocking block 32 moves with the pulverized coal burner 12, so that the knocking block 32 always knocks on the position of the outer wall of the cement rotary kiln 11 attached to the kiln skin burned by the pulverized coal burner 12.

[0041] Reference Figure 1 A high temperature resistant rubber pad 5 is fixedly mounted on one end of the knocking block 32 close to the cement rotary kiln 11 .

[0042] The high temperature resistant rubber pad 5 can reduce the deformation of the knocking block 32 when knocking the outer wall of the cement rotary kiln 11 , which is beneficial to prolonging the service life of the knocking block 32 .

[0043] The implementation principle of the device for solving the problem of long and thick inverted conical kiln skin in the main firing zone of cement rotary kiln in the embodiment of the present application is as follows: Before use, the pulverized coal fed into the pulverized coal burner 12 is first crushed to a fineness of 7-8 meshes, the internal wind of the pulverized coal burner 12 is adjusted to 250m / s, the external wind is adjusted to 310m / s, and the coal supply wind is adjusted to 24-25m / s, so that the pulverized coal can be fully burned. When in use, the motor 21 drives the first gear 22 to rotate, the first gear 22 drives the second gear 23 to rotate, and the second gear 23 drives the cement rotary kiln 11 to rotate. The second gear 23 drives the third gear 331 to rotate, the third gear 331 rotates to drive the fourth gear 332 to rotate, the fourth gear 332 rotates to drive the fixed rod 333 to rotate, the fixed rod 333 rotates to drive the connecting rod 334 to move, and the connecting rod 334 moves to drive the knocking block 32 to slide along the limit rod 31. At the same time, by controlling the first electro-hydraulic push rod 42, the pulverized coal burner 12 can move in the horizontal direction to control the distance between the flame spraying end of the pulverized coal burner 12 and the lower end of the cement rotary kiln 11. At this time, the hydraulic oil in the rod cavity of the first electro-hydraulic push rod 42 enters the rod cavity of the fixed rod 333, pushing the movable end of the fixed rod 333 to move toward the fixed end, and the knocking block 32 moves with the pulverized coal burner 12, so that the knocking block 32 always knocks on the outer wall of the cement rotary kiln 11 where the kiln lining burned by the pulverized coal burner 12 is attached, thereby accelerating the falling of the kiln lining and further improving the hourly output of the cement rotary kiln 11.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for solving the problem of long and thick inverted tapered kiln skin in the main firing zone of cement rotary kiln, characterized in that: The invention comprises a base (1), a cement rotary kiln (11) is rotatably mounted on the base (1), the cement rotary kiln (11) is tiltedly mounted, the cement rotary kiln (11) is connected to a driving mechanism (2), the driving mechanism (2) is used to drive the cement rotary kiln (11) to rotate, a knocking mechanism is arranged on the base (1), the knocking mechanism is used to knock the cement rotary kiln (11), the base (1) is provided with a displacement mechanism, the displacement mechanism is connected to a pulverized coal burner (12), the pulverized coal burner (12) can extend from the lower end of the cement rotary kiln (11), and the displacement mechanism comprises: A mounting rod (41), wherein the mounting rod (41) is fixedly mounted on the base (1); A first electro-hydraulic push rod (42), wherein a fixed end of the first electro-hydraulic push rod (42) is fixedly mounted on an end of the mounting rod (41) away from the base (1); a second electro-hydraulic push rod (43), wherein the fixed end of the second electro-hydraulic push rod (43) is fixedly connected to the movable end of the first electro-hydraulic push rod (42), and the displacement direction of the movable end of the second electro-hydraulic push rod (43) is perpendicular to the displacement direction of the movable end of the first electro-hydraulic push rod (42), and both are parallel to the horizontal plane; An adjusting component (44), the adjusting component (44) being connected to the second electro-hydraulic push rod (43), the adjusting component (44) being connected to the pulverized coal burner (12), and the adjusting component (44) being used to adjust the height of the flame spraying end of the pulverized coal burner (12).

2. The device for solving the problem of long and thick inverted tapered kiln skin in the main firing zone of cement rotary kiln according to claim 1 is characterized in that: The regulating component (44) comprises: a third electro-hydraulic push rod (441), wherein a fixed end of the third electro-hydraulic push rod (441) is fixedly connected to a movable end of the second electro-hydraulic push rod (43), and the movable end of the third electro-hydraulic push rod (441) is hinged to the pulverized coal burner (12); A fourth electro-hydraulic push rod (442), wherein the fixed end of the fourth electro-hydraulic push rod (442) is fixedly connected to the movable end of the second electro-hydraulic push rod (43), and the movable end of the fourth electro-hydraulic push rod (442) is hinged to the pulverized coal burner (12).

3. The device for solving the problem of long and thick inverted tapered kiln skin in the main firing zone of cement rotary kiln according to claim 1 is characterized in that: The driving mechanism comprises: A motor (21), the motor (21) being fixedly mounted on the base (1), the motor (21) being arranged in parallel with the cement rotary kiln (11); A first gear (22), the first gear (22) being coaxially fixedly connected to an output end of the motor (21); A second gear (23), the second gear (23) is coaxially fixedly connected to the outer wall of the cement rotary kiln (11), and the first gear (22) is meshed with the second gear (23).

4. The device for solving the problem of long and thick kiln skin with inverted cone shape in the main firing zone of cement rotary kiln according to claim 3 is characterized in that: The knocking mechanism comprises: A limiting rod (31), wherein the limiting rod (31) is connected to the base (1); a knocking block (32), the knocking block (32) being slidably mounted on the limiting rod (31); A transmission assembly (33), the transmission assembly (33) being connected to the knocking block (32), the transmission assembly (33) being connected to the second gear (23), and the transmission assembly (33) being used to drive the knocking block (32) to move.

5. The device for solving the problem of long and thick inverted tapered kiln skin in the main firing zone of cement rotary kiln according to claim 4 is characterized in that: The transmission assembly (33) comprises: a third gear (331), the third gear (331) being rotatably connected to the base (1), and the third gear (331) being meshed with the second gear (23); a fourth gear (332), the fourth gear (332) being rotatably connected to the base (1), and the third gear (331) being meshed with the fourth gear (332); a fixing rod (333), the fixing rod (333) being fixedly mounted on a side wall of the fourth gear (332), the fixing rod (333) and the fourth gear (332) being eccentrically arranged; A connecting rod (334), the fixing rod (333) is passed through and rotatably mounted on one end of the connecting rod (334), and the other end of the connecting rod (334) is hinged to the knocking block (32).

6. The device for solving the problem of long and thick inverted tapered kiln skin in the main firing zone of cement rotary kiln according to claim 5 is characterized in that: The limiting rod (31) is slidably connected to the base (1); the fixing rod (333) is a telescopic structure; the sliding direction of the limiting rod (31) is the same as the telescopic direction of the fixing rod (333).

7. The device for solving the problem of long and thick inverted tapered kiln skin in the main firing zone of cement rotary kiln according to claim 5 is characterized in that: The rod cavity of the first electro-hydraulic push rod (42) is in communication with the rod cavity of the fixed rod (333).

8. The device for solving the problem of long and thick inverted tapered kiln skin in the main firing zone of cement rotary kiln according to claim 4 is characterized in that: A high temperature resistant rubber pad (5) is fixedly mounted on one end of the knocking block (32) close to the cement rotary kiln (11).

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