Burner outer air nozzle angle adjustment device

Abstract

The application discloses a burner outer wind nozzle angle adjusting device, which mainly applies to the technical field of burners for rotary kilns and comprises an inner pipeline component and an outer wind nozzle angle adjusting mechanism. The outer wind nozzle angle adjusting mechanism is located outside the inner pipeline component. The outer wind nozzle angle adjusting mechanism comprises a nozzle supporting component, a pipeline inclined groove component, a driving component and a nozzle. The driving component drives the pipeline inclined groove component to move, converts the straight stroke movement of the driving component into the angular stroke movement of the pipeline inclined groove component, drives the one end of the nozzle small ball body to rotate, and drives the one end of the nozzle large ball body to move around the large ball body center under the action of the nozzle supporting component, so that the purpose of online adjusting the angle of the burner outer wind nozzle is achieved. The nozzle can be conveniently replaced through the disassembly and assembly of the nozzle supporting component, and the parameters of the outer wind outlet can be adjusted through the replacement of the nozzle.

Description

Technical Field

[0001] This invention relates to the field of burner technology for rotary kilns, and more particularly to a burner external air nozzle angle adjustment device. Background Technology

[0002] Rotary kiln burners are core equipment in cement production lines. Their main purpose is to feed fuel into the rotary kiln for combustion, adjust the flame shape, control the temperature distribution within the kiln, and provide the necessary heat for clinker calcination. By setting the parameters at the burner head, the air outlet velocity and fuel outlet velocity are controlled. Adjusting the air outlet velocity regulates the flame shape, thereby adjusting the temperature distribution within the rotary kiln and creating a specific flow field. Combined with the fuel outlet velocity, this ensures thorough mixing of air and fuel, enabling rapid and complete combustion. The performance of the burner directly impacts the economic, social, and environmental benefits of the enterprise. A good burner not only significantly increases the enterprise's economic benefits but also plays a crucial role in saving construction costs, increasing the localization rate of cement equipment, developing a friendly, ecological, and environmentally friendly green cement industry, and achieving a sustainable circular economy.

[0003] Currently, there are many burner manufacturers on the market, and the performance of each burner is constantly being improved, leading to increasingly fierce competition. Customers' focus when purchasing combustion equipment has shifted from solely considering energy-saving and consumption-reducing capabilities to evaluating a burner's energy-saving and consumption-reducing capabilities, NOx emissions, lifespan, resistance to fluctuations, flexible adjustment capabilities, and automated control, among other comprehensive capabilities. In particular, the ability to adjust the airflow and velocity in each burner channel, and the swirl intensity in some channels, allowing for flexible control of the flame shape and temperature field, has become especially valued by customers in recent years.

[0004] Currently, the external air outlet of burners from various manufacturers is along the axial direction with a fixed angle. Making the external air outlet angle adjustable online can improve the swirl intensity and adjustment capability of the burner, increase the flame adjustment range, and improve the adaptability of the burner. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a burner external air nozzle angle adjustment device.

[0006] This invention is achieved through the following technical solution: A burner external air nozzle angle adjustment device, comprising: An inner piping component, the inner piping component comprising a precision-machined head assembly and an inner tube; An external air nozzle angle adjustment mechanism is located outside the inner duct component and includes a nozzle support component, a duct groove component, a drive component, and a nozzle.

[0007] The finishing head assembly includes a finishing head tube, a fixed shaft, and a large roller. The front end of the finishing head tube is threaded. Two fixed shafts are symmetrically welded to the outer surface of the finishing head tube. A thread is provided at the outer end of the fixed shaft. The large roller is rotatably mounted on the fixed shaft. A bolt is provided at the outer end of the fixed shaft. The bolt restricts the movement of the large roller in the axial direction of the fixed shaft. The inner tube includes a support plate, an axial positioning block, a seamless tube, and a lifting platform fixing seat. The front end of the seamless tube is fixedly connected to the rear end of the precision-machined head tube. The support plate, the axial positioning block, and the lifting platform fixing seat are welded onto the seamless tube. The support plate has holes, and there are two axial positioning blocks. The gaps between the support plate, the lifting platform fixing seat, and the two axial positioning blocks are aligned.

[0008] The nozzle is gourd-shaped, with a large sphere at the front end and a small sphere at the rear end, connected by a thin transition section. A hole is opened in the center of the nozzle along its axial direction, serving as an external air outlet.

[0009] The nozzle support component includes an external air head, a front baffle, and connecting screws; The front and rear ends of the external air head are both grooves, and there is a ring-shaped steel plate of a certain thickness in the middle. The center of the ring-shaped steel plate is a threaded hole, and multiple ball holes are opened on the circumference of the ring-shaped steel plate. The minimum cross-sectional size of the ball holes is larger than the outer diameter of the nozzle ball, ensuring that the ball can pass through. The threaded hole in the center of the annular steel plate is connected to the threaded front end of the precision-machined head tube. The front baffle has ball holes that correspond one-to-one with the annular steel plate. The front baffle is installed inside the front groove of the external air head. The front baffle and the annular steel plate are connected by connecting screws. The large spheres of the multiple nozzles are located inside the ball holes of the annular steel plate and the front baffle, enclosing the large spheres of the nozzles. The large spheres rotate around their centers within the ball holes of the annular steel plate and the front baffle. By removing the connecting screws, the front baffle can be removed, and the nozzles can be detached for easy nozzle replacement.

[0010] The pipe groove component includes an annular drag block and a grooved pipe; The annular drag block is fixedly connected to the front end of the inclined groove tube, and the inclined groove tube is connected to the central hole of the annular drag block. The annular drag block is rotatably installed in the rear groove of the external air head. The annular drag block and the inclined groove tube are sleeved on the outside of the precision-machined head tube. Multiple cylindrical holes are opened on the annular drag block, which correspond one-to-one with the ball holes on the annular steel plate. The nozzle ball moves and rotates axially in the cylindrical holes.

[0011] Flower flanges are welded to both ends of the inclined groove tube. Three holes are evenly arranged in the circumferential direction of each flower flange. A wheel axle is installed in each hole. Small rollers are installed at both ends of the wheel axle on both sides of the flower flange. The inclined tube has a spiral inclined groove, two symmetrically distributed straight grooves, and six small roller clearance grooves; the spiral inclined groove has an angle of 45°. The inclined groove tube rotates on the precision-machined head assembly via the rotation of small rollers; The large rollers are located in two straight grooves, and the large rollers restrict the movement of the inclined groove tube in the axial direction.

[0012] The driving component includes a top block, a seamless tube 2, a slider, a flange, and a lifting mechanism. The top block is fixed to the front end of the seamless tube 2, the slider is fixed to the middle of the seamless tube 2, and the flange is fixed to the rear end of the seamless tube 2. The flange and the flange on the lifting mechanism are connected by bolts.

[0013] The drive component adjusts the extension and retraction of the lifting screw by rotating the lifting handwheel.

[0014] The top block is located inside the inclined groove of the inclined groove tube; The slider is located between two axial positioning blocks and is used to restrict the axial movement of the drive component to prevent it from deflecting.

[0015] The opening on the support plate is larger than the diameter of the seamless tube 2. The seamless tube 2 is inserted into the opening on the support plate to support the drive component and restrict its axial movement to prevent it from deflecting. The elevator mounting base and the elevator are connected by bolts.

[0016] The advantages of this invention are: 1. In this invention, the angle of the external air nozzle can be adjusted online without stopping the kiln, which can improve the swirl intensity and adjustment capability of the burner, increase the flame adjustment range, and improve the adaptability of the burner.

[0017] 2. In this invention, the external air nozzle is replaceable. Prolonged use inside a high-temperature rotary kiln can cause nozzle burn-out; the nozzle can be removed and replaced with a new one, extending the burner's service life. The nozzle outlet parameters can be adjusted by replacing the nozzle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a burner external air nozzle angle adjustment device.

[0019] Figure 2 This is a schematic diagram of the inner pipe components.

[0020] Figure 3 This is a schematic diagram of the external air nozzle angle adjustment mechanism.

[0021] Figure 4 This is a schematic diagram of the nozzle support component.

[0022] Figure 5 This is a schematic diagram of a pipe groove component.

[0023] Figure 6 This is a schematic diagram of the drive component.

[0024] In the picture: 100: Inner pipe component. 110: Finished head assembly; 111: Finished head tube; 112: Fixed shaft; 113: Large roller. 120: Inner tube; 121: Support plate; 122: Axial positioning block; 123: Seamless tube; 124: Lifting machine fixed seat.

[0025] 200: External air nozzle angle adjustment mechanism. 210: Nozzle support component; 211: External air head; 212: Front baffle; 213: Connecting screw. 220: Pipe sloping groove component; 221: Circular drag block; 222: Floral flange; 223: Sloping groove pipe; 224: Small roller; 225: Wheel axle; 226: Spiral sloping groove; 227: Straight groove; 228: Small roller clearance groove. 230: Drive component; 231: Top block; 232: Seamless pipe II; 233: Slider; 234: Flange; 235: Lifting mechanism. Detailed Implementation

[0026] Based on the accompanying drawings, the embodiments of the technical solution of this invention are described in detail and clearly below. These embodiments are merely one example of this invention and not all possible implementations. Many other embodiments may be implemented without departing from the spirit and scope of the claims, and all of these fall within the protection scope of this patent.

[0027] Combined with appendix Figure 1-6 In this embodiment, a burner external air nozzle angle adjustment device includes: The inner pipe component 100 includes a precision-machined head assembly 110 and an inner pipe 120. The external air nozzle angle adjustment mechanism 200 is located outside the inner duct component 100 and includes a nozzle support component 210, a duct inclined groove component 220, a drive component 230, and a nozzle 201.

[0028] To facilitate a thorough understanding of the specific structure and principle of the inner pipe component 100 by those skilled in the art, the inner pipe component 100 is further described. In this embodiment, see the attached diagram. Figure 2The precision-machined head assembly 110 includes a precision-machined head tube 111, a fixed shaft 112, and a large roller 113. The precision-machined head tube 111 is a precision-machined part with a threaded section at its front end. There are two fixed shafts 112, symmetrically welded to the precision-machined head tube 111. Each fixed shaft 112 has a smooth section and a threaded section. The large roller 113 has a hole in the middle, with a diameter larger than the outer diameter of the fixed shaft 112, and fits onto the fixed shaft 112. The length of the smooth section on the fixed shaft 112 is slightly greater than the thickness of the large roller 113, and it is connected to the threaded section on the fixed shaft 112 by bolts, restricting the movement of the large roller 113 along the axis of the fixed shaft 112 without affecting its rotation. The inner tube 120 includes a support plate 121, an axial positioning block 122, a seamless tube 123, and a lifting platform fixed seat 124. The support plate 121, the axial positioning block 122, and the lifting platform fixed seat 124 are welded onto the seamless tube 123. The support plate 121 has an opening, and there are two axial positioning blocks 122.

[0029] Specifically, the precision-machined head tube 111 has the same outer diameter as the seamless tube 123 and is welded together. The support plate 121 and the fixed shaft 112 are arranged at 90° on the circumference. After welding, the holes on the support plate 121 are coaxial, and the axial positioning block 122 and the lifting platform fixed seat 124 are symmetrically arranged along the center plane of the support plate 121, which passes through the center line of the hole on the support plate 121.

[0030] To facilitate a thorough understanding of the specific structure and principle of nozzle 201 by those skilled in the art, further explanation of nozzle 201 is provided. Nozzle 201 is gourd-shaped, with two incomplete spheres at both ends. The spheres have different diameters, with a larger sphere at the front and a smaller sphere at the rear. Both spheres have a flat end, and the other ends are connected by an intermediate transition section. The intermediate section is thinner, and a central opening is provided along the nozzle axis to serve as an external air outlet.

[0031] To facilitate a thorough understanding of the specific structure and principle of the nozzle support component 210 by those skilled in the art, the nozzle support component 210 is further described below. In this embodiment, see attached drawing. Figure 4The nozzle support component 210 includes an external air head 211, a front baffle 212, and connecting screws 213. The external air head 211 has grooves at both ends and a ring-shaped steel support plate of a certain thickness in the middle, with threads at the center of the ring. Four threaded holes are evenly machined on a circumference of a certain diameter, with the hole depth not exceeding the thickness of the central ring-shaped steel support plate. Twelve ball holes are evenly distributed on a circumference of a certain diameter on the central steel support plate, with the ball diameter being the same as the large ball of the nozzle 201, forming a spherical fit. The minimum cross-sectional dimension of the ball is larger than that of the small ball of the nozzle. The front baffle 212 has twelve ball holes on a circumference of the same diameter as the external air head 211, with the ball diameter being the same as the large ball of the nozzle 201, forming a spherical fit. Four countersunk screw holes are also present on a circumference of the same diameter as the external air head 211. The external air head 211 and the front baffle 212 are connected by connecting screws 213. The ball holes of the external air head 211 and the front baffle 212 enclose the large ball of the nozzle 201, allowing the large ball of the nozzle 201 to rotate only around its center. The depth of the groove at the front end of the external air head 211 is the same as the thickness of the front baffle 212. After the external air head 211 and the front baffle 212 are connected, the front end face of the front baffle 212 and the front end face of the external air head 211 are on the same plane. To facilitate a thorough understanding of the specific structure and principle of the pipe inclined groove component 220 by those skilled in the art, the pipe inclined groove component 220 is further described. In this embodiment, see the attached drawing. Figure 5 The duct inclined groove component 220 includes a circular drag block 221, a flange 222, an inclined groove tube 223, small rollers 224, axle 225, and matching nuts and washers. The circular drag block 221 has 12 cylindrical holes machined on a circumference with the same diameter as the spherical structure of the external air head 211. These cylindrical holes transition into the small sphere of the nozzle 201, allowing the small sphere of the nozzle 201 to move axially and rotate within the cylindrical holes. The inclined groove tube 223 has a spiral inclined groove 226, two symmetrically distributed straight grooves 227, and six small roller clearance grooves 228. A large roller 113 is installed within the straight groove 227, with a diameter equal to the width of the straight groove 227, ensuring that the duct inclined groove component 220 can only rotate and cannot move axially. The angle of the spiral inclined groove can be set as needed; in this example, the inclined groove angle is set to 45°. The flange 222 is welded to the inclined groove pipe 223. Three holes are evenly arranged circumferentially for mounting the axle 225. Small rollers 224 are mounted on the axle 225 and limited by bolts and washers, allowing rotation around the centerline of the axle 225. The small rollers 224 are evenly distributed on both sides of the flange 222, ensuring that the inclined groove component 220 is concentric with the finished head pipe 111 and can rotate outside the finished head pipe 111. To facilitate a thorough understanding of the specific structure and principle of the drive component 230 by those skilled in the art, further description of the drive component 230 is provided. In this embodiment, see the attached diagram. Figure 6The driving component 230 includes a top block 231, a seamless tube 232, a slider 233, a flange 234, and a lift 235. The top block 231, slider 233, and flange 234 are welded to the seamless tube 232, and the flange 234 is bolted to the flange on the lift. The top block 231 is placed in the inclined groove of the inclined tube 223. The outer diameter of the top block 231 is slightly smaller than the width of the inclined groove, allowing it to move within the groove. The center lines of the slider 233 and the top block 231 are on the same plane. The slider 233 is installed between the axial positioning blocks 122 to restrict the axial movement of the driving component 230 and prevent it from deviating. The opening on the support plate 121 is larger than the diameter of the seamless tube 232. The seamless tube 232 is inserted into the opening on the support plate 121 to support the driving component 230 and restrict its axial movement to prevent it from deviating. Under the constraints of the support plate 121, the axial positioning block 122, and the slider 233, the seamless tube 232 and the top block 231 can only move linearly in the axial direction.

[0032] Working principle: The handwheel of the lifting mechanism 235 rotates, causing the lifting screw to extend and retract. The screw drives the seamless tube 232 to move through the flange 234. Under the constraint of the support plate 121, the axial positioning block 122, and the slider 233, the seamless tube 232 can only move linearly in the axial direction, thereby driving the top block 231 to move linearly. The pipe inclined groove component 220 can only rotate along the center line of the precision-machined head tube 111 under the action of the small roller 224 and the wheel axle 225. Under the force of the top block 231, and with the help of the spiral groove, the top block 231 is transformed into the angular stroke motion of the groove tube 223. The groove tube 223, dragged by the flower flange 222 and the small roller 224, rotates on the inner tube 120 along the center line of the precision-machined head tube 111. The circular drag block 221 and the groove tube 223 are welded together and also rotate. The spiral groove angle is 45°, and the linear displacement of the lifting screw and the angular displacement of the groove tube 223 are equal. The small ball of the nozzle 201 rotates under the drive of the circular drag block 221, and the large ball of the nozzle 201 rotates along the center of the ball under the wrapping of the outer air head 211 and the front baffle 212, thereby rotating the nozzle 201, which was originally in the axial direction, along the center of the large ball of the nozzle 201, thus realizing the rotation of the nozzle 201.

[0033] If nozzle 201 needs to be replaced, the connecting screw 213 can be removed, the front baffle 212 and the external air head 211 can be separated, and nozzle 201 can be removed from the front end of external air head 211. The new nozzle 201 is inserted in the same direction, the small ball passes through the ball hole of external air head 211 and is inserted into the circular support block 221, and the large ball fits into the ball hole of external air head 211. The front baffle 212 and external air head 211 are connected by connecting screw 213 to complete the replacement of nozzle 201.

Claims

1. A burner external air nozzle angle adjustment device, characterized in that, include: The inner pipe component (100) includes a precision-machined head assembly (110) and an inner tube (120); the outer air nozzle angle adjustment mechanism (200) is located outside the inner pipe component (100) and includes a nozzle support component (210), a pipe groove component (220), a drive component (230) and a nozzle (201). The finishing head assembly (110) includes a finishing head tube (111), a fixed shaft (112), and a large roller (113). The finishing head tube (111) has a thread at its front end. Two fixed shafts (112) are symmetrically welded to the outer surface of the finishing head tube (111). A thread is provided at the outer end of the fixed shaft (112). The large roller (113) is rotatably mounted on the fixed shaft (112). A bolt is provided at the outer end of the fixed shaft (112), and the bolt restricts the movement of the large roller (113) in the axial direction of the fixed shaft (112). The inner tube (120) includes a support plate (121), an axial positioning block (122), a seamless tube (123), and a lifting platform fixed seat (124). The front end of the seamless tube (123) is fixedly connected to the rear end of the precision-machined head tube (111). The support plate (121), the axial positioning block (122), and the lifting platform fixed seat (124) are welded onto the seamless tube (123). The support plate (121) has an opening. There are two axial positioning blocks (122). The gaps between the support plate (121), the lifting platform fixed seat (124), and the two axial positioning blocks (122) are aligned.

2. The burner external air nozzle angle adjustment device according to claim 1, characterized in that: The nozzle (201) is gourd-shaped, with a large sphere at the front end and a small sphere at the rear end. A thin transition section connects the front and rear ends, and a hole is opened in the center of the nozzle axis.

3. The burner external air nozzle angle adjustment device according to claim 2, characterized in that: The nozzle support component (210) includes an external air head (211), a front baffle (212), and connecting screws (213); the front and rear ends of the external air head (211) are both grooves, and there is an annular steel plate of a certain thickness in the middle. The center of the annular steel plate is a threaded hole, and multiple ball holes are opened on the circumference of the annular steel plate. The minimum cross-sectional size of the ball holes is larger than the outer diameter of the nozzle ball. The threaded hole in the center of the annular steel plate is threaded to the front end of the precision-machined head tube (111). The front baffle (212) has ball holes that correspond one-to-one with the annular steel plate. The front baffle (212) is installed inside the front groove of the external wind head (211). The front baffle (212) and the annular steel plate are connected by connecting screws (213). The large spheres of multiple nozzles (201) are located inside the ball holes of the annular steel plate and the front baffle (212), covering the large spheres of the nozzles (201). The large spheres rotate around the center of the ball in the ball holes of the annular steel plate and the front baffle (212).

4. The burner external air nozzle angle adjustment device according to claim 3, characterized in that: The pipe grooving component (220) includes an annular drag block (221) and a grooving pipe (223); the annular drag block (221) is fixedly connected to the front end of the grooving pipe (223), and the grooving pipe (223) is connected to the central hole of the annular drag block (221). The annular drag block (221) is rotatably installed in the rear end groove of the external air head (211). The annular drag block (221) and the grooving pipe (223) are sleeved on the outside of the precision-machined head pipe (111). Multiple cylindrical holes are opened on the annular drag block (221) that correspond one-to-one with the ball holes on the annular steel plate. The small ball of the nozzle (201) moves and rotates axially in the cylindrical holes.

5. The burner external air nozzle angle adjustment device according to claim 4, characterized in that: Flower flanges (222) are welded to both ends of the inclined tube (223). Three holes are evenly arranged in the circumferential direction of each flower flange (222), and a wheel axle (225) is installed in each hole. Small rollers (224) are installed on both sides of the flower flange at both ends of the wheel axle. A spiral inclined groove (226), two symmetrically distributed straight grooves (227), and six small roller clearance grooves (228) are opened on the inclined tube (223). The spiral inclined groove angle is 45°. The inclined tube (223) rotates on the precision-machined head assembly (110) by the rotation of the small rollers (224). The large roller (113) is located in the two straight grooves (227) and restricts the movement of the inclined tube (223) in the axial direction.

6. The burner external air nozzle angle adjustment device according to claim 5, characterized in that: The drive component (230) includes a top block (231), a seamless tube (232), a slider (233), a flange (234), and a lift (235). The top block (231) is fixed to the front end of the seamless tube (232), the slider (233) is fixed to the middle of the seamless tube (232), and the flange (234) is fixed to the rear end of the seamless tube (232). The flange (234) and the flange on the lift (235) are connected by bolts.

7. The burner external air nozzle angle adjustment device according to claim 6, characterized in that: The drive component (230) adjusts the extension and retraction of the screw of the elevator (235) by rotating the handwheel of the elevator (235).

8. The burner external air nozzle angle adjustment device according to claim 7, characterized in that: The top block (231) is located in the inclined groove of the inclined tube (223); the slider (233) is located between two axial positioning blocks (122).

9. The burner external air nozzle angle adjustment device according to claim 8, characterized in that: The opening on the support plate (121) is larger than the diameter of the seamless tube (232), and the seamless tube (232) is inserted into the hole on the support plate (121); the elevator fixing seat (124) and the elevator (235) are connected by bolts.

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