A platform for boiler furnace maintenance

Abstract

The invention provides a kind of ash hole platform for boiler furnace overhaul, including support frame, support base plate and suspension assembly, suspension assembly includes support component and power component;Support component includes suspension mounting seat, suspension support rod is slidably arranged on suspension mounting seat along the width direction of support frame, electronic brake is fixedly arranged on suspension mounting seat;Power component includes power mounting seat, transmission rack is arranged at the side wall of suspension support rod along the length direction of suspension support rod, servo motor is fixedly arranged on power mounting seat and electrically connected with pressure sensor, transmission gear is fixedly sleeved on the output end of servo motor and is engaged with transmission rack, locking mechanism is arranged between power mounting seat and support frame to lock and fix power mounting seat and support frame.The ash hole platform is used to replace the erection of scaffold, with the advantages of high erection efficiency and safe erection process.

Description

Technical Field

[0001] This invention relates to boiler maintenance platforms, and more particularly, to an ash collection platform for boiler furnace maintenance. Background Technology

[0002] A power plant boiler, also known as a power turbine boiler, refers to a medium-to-large-sized boiler in a power plant that provides a specified quantity and quality of steam to the steam turbine. Power plant boilers are one of the main thermal equipment in thermal power plants, often paired with a steam turbine generator set of a certain capacity, primarily for power generation. The boiler's interior is equipped with a furnace, typically inverted U-shaped, with a cold ash hopper at the bottom for collecting, cooling, and automatically discharging ash and slag.

[0003] During furnace maintenance, to prevent foreign objects from falling into the cold ash hopper, scaffolding needs to be erected and bamboo rafts laid at the cold ash hopper. However, the efficiency of erecting scaffolding is low, and the process is also quite dangerous. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide an ash outlet platform for boiler furnace maintenance, which has the advantages of high construction efficiency and relatively safe construction process.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a ash port platform for boiler furnace maintenance, comprising a support frame, a support base plate and a suspension assembly. The shape of the support frame is adapted to the shape of the manhole on the boiler, and the support frame can be inserted into the boiler furnace through the manhole. The support base plate is provided in several parts and is laid along the length of the support frame on the inner bottom of the support frame, allowing operators to stand on it. The suspension assembly includes a support component and a power component. The support component includes a suspension mounting seat detachably mounted on the upper end of the support frame, a suspension support rod slidably mounted on the suspension mounting seat along the width direction of the support frame, and an electronic brake fixedly mounted on the suspension mounting seat. A pressure sensor is provided at the end of the suspension support rod, and the pressure sensor is electrically connected to the electronic brake. A brake pad is fixedly mounted along the length direction on the side wall of the suspension support rod, and the electronic brake is sleeved on the outside of the brake pad. When the suspension support rod abuts against the inner wall of the boiler furnace, the pressure sensor sends an electrical signal to the electronic brake, and the electronic brake clamps the brake pad. The power component includes a power mounting base slidably disposed on the upper part of the support frame along its length, a transmission rack disposed on the side wall of the suspension support rod along its length, a servo motor fixedly disposed on the power mounting base and electrically connected to the pressure sensor, a transmission gear fixedly sleeved on the output end of the servo motor and meshing with the transmission rack, and a locking mechanism disposed between the power mounting base and the support frame for locking the power mounting base and the support frame in place. When the suspension support rod abuts against the inner wall of the boiler furnace, the pressure sensor sends an electrical signal to the servo motor, and the servo motor stops operating.

[0006] Using the above technical solution, when it is necessary to build an ash collection platform inside the boiler furnace, the first step is to install two support components at the rear end of the support frame, ensuring that the two support components are arranged opposite each other. The second step is to push the suspension support rods towards the inside of the support frame to ensure that the distance between the outer ends of the two opposite suspension support rods is less than the width of the manhole in the boiler furnace. The third step is to push the power mounting seat towards the rear end of the support frame until the transmission gear on the power mounting seat meshes with the transmission rack on the suspension support rod. The fourth step is to lock and fix the power mounting seat to the support frame using a locking mechanism. The fifth step is to push the support frame so that the rear end of the support frame passes through the manhole in the boiler furnace and enters the boiler furnace. In the sixth step, the servo motor controls the rotation of the transmission gear, which, through a meshing rack, moves the suspension support rod outwards from the support frame. When the end of the suspension support rod contacts the inner wall of the boiler furnace, pressure sensors send electrical signals to the electronic brake and the servo motor. Upon receiving the signal, the electronic brake engages the brake pads, locking the suspension support rod to prevent it from moving inwards. Upon receiving the signal, the servo motor stops operating to prevent the suspension support rod from being deformed due to excessive elongation. In the seventh step, the locking mechanism is unlocked, and the power mounting base is pulled, moving it to the support frame. Step 8: Install two support components at the front end of the support frame, ensuring they are positioned opposite each other. Step 9: Push the suspension support rods towards the inside of the support frame to ensure the distance between the outer ends of the two opposite suspension support rods is less than the width of the inlet in the boiler furnace. Step 10: Push the power mounting base towards the rear end of the support frame until the transmission gear on the power mounting base meshes with the transmission rack on the suspension support rod. Step 11: Lock the power mounting base to the support frame using a locking mechanism. Step 12: Push the support frame so that its front end passes through the manhole in the boiler furnace and enters the inside of the boiler furnace. Step 13: [Further steps are missing from the original text, likely due to an error in the original source.] The machine controls the rotation of the transmission gear, which drives the suspension support rod to move outward of the support frame through the meshing transmission rack. When the end of the suspension support rod contacts the inner wall of the boiler furnace, the pressure sensor sends electrical signals to the electronic brake and the servo motor respectively. After receiving the electrical signal, the electronic brake clamps the brake pads, thereby locking the suspension support rod to prevent it from moving inward of the support frame. After receiving the electrical signal, the servo motor stops running to prevent the suspension support rod from being squeezed and deformed due to excessive extension. Then, the operator can enter the boiler furnace through the manhole and stand on the support base plate to carry out subsequent operations.

[0007] Using the aforementioned gray-faced platform instead of scaffolding offers advantages such as high construction efficiency and a safer construction process.

[0008] Preferably, the transmission gear includes an inner gear ring fixedly sleeved on the output end of the servo motor and an outer gear ring rotatably sleeved on the outside of the inner gear ring. The outer wall of the inner gear ring has a plurality of mounting grooves evenly distributed circumferentially. Each mounting groove is provided with an elastic sliding unit. The inner wall of the outer gear ring has a transmission groove that corresponds to and communicates with each of the mounting grooves. The outer end of the elastic sliding unit extends into the transmission groove to drive the outer gear ring and the inner gear ring to rotate synchronously.

[0009] With the above technical solution, when the end of the suspension support rod abuts against the inner wall of the boiler furnace, if the pressure sensor fails to control the servo motor to shut down in time, the servo motor will continue to drive the inner ring of the gear to rotate circumferentially. Since the suspension support rod is in contact with the inner cavity of the boiler furnace, it cannot continue to move to the outside of the support frame. Therefore, at this time, the outer ring of the gear will stop rotating, and the elastic sliding unit will be continuously pressed into the mounting groove by the outer ring of the gear.

[0010] The transmission gears configured as described above can be used to protect the suspension support rod, preventing it from being squeezed and deformed due to excessive elongation.

[0011] Preferably, the elastic sliding unit includes a support spring disposed inside the mounting groove and a sliding protrusion slidably disposed in the mounting groove. The inner end of the sliding protrusion abuts against the outer end of the support spring, and the outer end of the sliding protrusion abuts against the inner wall of the transmission groove under the elastic force of the support spring. The outer end of the sliding protrusion is hemispherical, and the shape of the transmission groove is adapted to the shape of the outer end of the sliding protrusion.

[0012] With the above technical solution, the outer end of the sliding protrusion is hemispherical, and the shape of the transmission groove is adapted to the shape of the outer end of the sliding protrusion, so that jamming is not likely to occur when the outer ring of the gear and the inner ring of the gear rotate relative to each other.

[0013] Preferably, the outer end of the suspension support rod is provided with an assembly groove along its length, the pressure sensor is disposed inside the assembly groove, an assembly rod is slidably disposed in the assembly groove, the outer end of the assembly rod protrudes from the assembly groove and is fixedly disposed with a roller mounting seat, and a support roller is rotatably disposed on the outer end of the roller mounting seat, the support roller being perpendicular to the boiler furnace.

[0014] By using the above technical solution, a support roller is provided at the end of the suspension support rod to change the friction between the ash-mouth platform and the boiler furnace from sliding friction to rolling friction, making the pushing process of the support frame more convenient and labor-saving.

[0015] Preferably, a return spring is fitted on the assembly rod, one end of which abuts against the roller mounting seat and the other end abuts against the inner wall of the assembly groove. The return spring drives the assembly rod away from the pressure sensor through its elastic force.

[0016] Through the above technical solution, the reset spring drives the assembly rod away from the pressure sensor through its elastic force. In this way, before the support roller comes into contact with the inner wall of the boiler furnace, the assembly rod is less likely to come into contact with the pressure sensor, thus avoiding accidental contact.

[0017] Preferably, the upper sidewall of the support frame is provided with a plurality of limiting grooves evenly distributed along its length. The locking mechanism includes a hinge seat fixedly disposed on the power mounting base, a limiting piece hinged to the hinge seat, a locking block fixedly disposed on the outer end of the limiting piece, and a locking spring fixedly wound around the inner end of the limiting piece and connected to the power mounting base. The locking spring drives the limiting piece to rotate counterclockwise around the hinge seat by elastic force, so that the locking block extends into the limiting groove. The end of the limiting piece away from the locking block is provided with a pull cable for the operator to pull the limiting piece to rotate clockwise.

[0018] With the above technical solution, when the two suspension support rods installed at the rear end of the support frame come into contact with the boiler furnace, the operator can pull the limit plate counterclockwise by pulling the cable to make the locking block disengage from the locking groove. Then the operator can pull the power mounting seat to slide towards the front of the support frame by pulling the cable, so as to drive the two suspension support rods installed at the front end of the support frame to move.

[0019] Preferably, the support frame includes two symmetrically arranged main support plates, a support base fixedly arranged between the two main support plates, and two symmetrically arranged side support plates. An adjusting guide sleeve is fixedly arranged at the lower end of the support base along its width direction, and the outer end of the adjusting guide sleeve protrudes from the side edge of the support base. An adjusting guide rod is fixedly arranged at the lower end of the side support plate, and the inner end of the adjusting guide rod is slidably arranged in the adjusting guide sleeve. A locking bolt is threadedly connected to the upper end of the adjusting guide sleeve, and the threaded section of the locking bolt abuts against the adjusting guide rod. The support frame also includes an auxiliary base plate, which is engaged with the upper part of the adjusting guide rod.

[0020] With the above technical solution, after the front and rear ends of the support frame are supported and lifted by four suspension support rods, the operator can crawl into the boiler furnace through the manhole and stand on the support base plate. At this time, the operator needs to loosen the locking bolts so that the threaded part of the locking bolts separates from the adjusting guide rod. Then the operator can push the support side plate to move away from the support base frame to increase the distance between the two support side plates and obtain a larger operating space. When the lower end of the support side plate touches the inner wall of the boiler furnace, the operator needs to tighten the locking bolts so that the threaded part of the locking bolts abuts against the adjusting guide rod to lock the support side plate. Finally, the operator only needs to place the auxiliary base plate on the upper part of the adjusting guide rod to obtain a larger working space. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 for Figure 1 Enlarged view of part A; Figure 3 A cross-sectional view of the supporting frame; Figure 4 This is a cross-sectional view of the transmission gear; Figure 5 This is a partial sectional view of the suspension support rod; Figure 6 This is a cross-sectional schematic diagram of the locking mechanism; Figure 7 This is a structural diagram of the auxiliary base plate.

[0022] Reference numerals: 1. Support base plate; 2. Support frame; 21. Support main plate; 22. Support base frame; 23. Support side plate; 24. Adjusting guide sleeve; 25. Adjusting guide rod; 26. Locking bolt; 3. Suspension assembly; 31. Support component; 311. Suspension mounting base; 312. Suspension support rod; 313. Electronic brake; 32. Power component; 321. Power mounting base; 322. Transmission rack; 323. Servo motor; 324. Transmission gear; 3241. Gear inner ring; 3 242. Gear outer ring; 325. Locking mechanism; 3251. Hinge seat; 3252. Limiting plate; 3253. Locking block; 3254. Locking spring; 3255. Cable; 4. Pressure sensor; 5. Brake pad; 6. Mounting groove; 7. Elastic sliding unit; 71. Support spring; 72. Sliding protrusion; 8. Transmission groove; 9. Assembly groove; 10. Assembly rod; 11. Roller mounting seat; 12. Support roller; 13. Return spring; 14. Limiting groove; 15. Auxiliary base plate. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered.

[0024] A boiler furnace maintenance ash collection platform, such as Figures 1 to 7 As shown, it includes a support frame 2, a support base plate 1, and a suspension assembly 3.

[0025] The shape of the support frame 2 is adapted to the shape of the manhole on the boiler, so that when the aforementioned ash-feed platform needs to be installed inside the boiler furnace, the support frame 2 can be inserted into the boiler furnace through the manhole. The support frame 2 includes two symmetrically arranged main support plates 21, a support base frame 22 fixedly arranged between the two main support plates 21, and two symmetrically arranged side support plates 23. The width of the main support plates 21 is greater than the width of the support base frame 22. The two side support plates 23 are respectively arranged on the left and right sides of the support base frame 22, and the outer edges of the side support plates 23 are flush with the outer edges of the main support plates 21. An adjusting guide sleeve 24 is fixedly arranged at the lower end of the support base frame 22 along its width direction. The outer end of the adjusting guide sleeve 24 protrudes from the side edge of the support base frame 22 and abuts against the inner side of the side support plate 23. An adjusting guide rod 25 is fixedly installed at the lower end of the supporting side plate 23. The outer end of the adjusting guide rod 25 is flush with the outer edge of the supporting side plate 23, and the inner end of the adjusting guide rod 25 is slidably disposed in the adjusting guide sleeve 24. A locking bolt 26 is threadedly connected to the upper end of the adjusting guide sleeve 24. The head of the locking bolt 26 protrudes from the side of the supporting main plate 21 for easy rotation by the operator. The threaded section of the locking bolt 26 abuts against the adjusting guide rod 25 to lock and fix the adjusting guide rod 25 and the adjusting guide sleeve 24. The supporting frame 2 also includes an auxiliary base plate 15. A slot is provided at the bottom of the auxiliary base plate 15 for locking onto the upper part of the adjusting guide rod 25.

[0026] Several support base plates 1 are laid along the length of the support frame 2 on the inner bottom of the support frame 2, allowing operators to stand on them during operation. The bottom of the support base plate 1 has a snap-fit ​​groove that matches the shape of the support base frame 22 to improve the connection stability between the support base plate 1 and the support base frame 22.

[0027] The suspension assembly 3 is used to mount the support frame 2 above the cold ash hopper. The suspension assembly 3 includes a support member 31 and a power member 32.

[0028] The support component 31 includes a suspension mounting base 311 detachably mounted on the upper end of the support main board 21, a suspension support rod 312 slidably mounted on the suspension mounting base 311 along the width direction of the support frame 2, and an electronic brake 313 fixedly mounted on the suspension mounting base 311. An assembly groove 9 is formed on the outer end of the suspension support rod 312 along its length direction. In this embodiment, the groove opening of the assembly groove 9 is rectangular. A pressure sensor 4 is provided at the bottom of the assembly groove 9, and the pressure sensor 4 is electrically connected to the electronic brake 313. An assembly rod 10 is slidably mounted in the assembly groove 9. The shape of the assembly rod 10 is adapted to the shape of the assembly groove 9. The outer end of the assembly rod 10 protrudes from the assembly groove 9 and is fixedly mounted on a roller mounting base 11. A support roller 12 is rotatably mounted on the outer end of the roller mounting base 11, and the support roller 12 is perpendicular to the boiler furnace. A return spring 13 is fitted onto the assembly rod 10. One end of the return spring 13 abuts against the roller mounting seat 11, and the other end abuts against the inner wall of the assembly groove 9. The return spring 13 drives the assembly rod 10 away from the pressure sensor 4 through its elastic force. A brake pad 5 is fixedly installed along the length of the side wall of the suspension support rod 312. An electronic brake 313 is fitted on the outside of the brake pad 5. When the suspension support rod 312 abuts against the inner wall of the boiler furnace, the pressure sensor 4 sends an electrical signal to the electronic brake 313, and the electronic brake 313 clamps the brake pad 5.

[0029] The power component 32 includes a power mounting base 321 slidably mounted on the upper part of the support frame 2 along its length; a transmission rack 322 mounted on the side wall of the suspension support rod 312 along its length; a servo motor 323 fixedly mounted on the power mounting base 321 and electrically connected to the pressure sensor 4; a transmission gear 324 fixedly sleeved on the output end of the servo motor 323 and meshing with the transmission rack 322; and a locking mechanism 325 located between the power mounting base 321 and the support frame 2 to lock the power mounting base 321 and the support frame 2 in place. When the suspension support rod 312 abuts against the inner wall of the boiler furnace, the pressure sensor 4 sends an electrical signal to the servo motor 323, and the servo motor 323 stops operating.

[0030] The transmission gear 324 includes an inner gear ring 3241 fixedly sleeved on the output end of the servo motor 323 and an outer gear ring 3242 rotatably sleeved on the outside of the inner gear ring 3241. Several mounting grooves 6 are evenly distributed circumferentially on the outer wall of the inner gear ring 3241, each extending radially along the inner gear ring 3241. Each mounting groove 6 is provided with an elastic sliding unit 7. The inner wall of the outer gear ring 3242 has a transmission groove 8 corresponding to and communicating with each mounting groove 6. The outer end of the elastic sliding unit 7 extends into the transmission groove 8 to drive the outer gear ring 3242 to rotate synchronously with the inner gear ring 3241. The elastic sliding unit 7 includes a support spring 71 disposed inside the mounting groove 6 and a sliding protrusion 72 slidably disposed in the mounting groove 6. The inner end of the sliding protrusion 72 abuts against the outer end of the support spring 71. Under the elastic force of the support spring 71, the outer end of the sliding protrusion 72 abuts against the inner wall of the transmission groove 8. The outer end of the sliding protrusion 72 is hemispherical, and the shape of the transmission groove 8 is adapted to the shape of the outer end of the sliding protrusion 72.

[0031] A plurality of limiting grooves 14 are evenly provided along the length of the upper sidewall of the support frame 2. The locking mechanism 325 includes a hinge seat 3251 fixedly mounted on the power mounting base 321, a limiting piece 3252 hinged to the hinge seat 3251, a locking block 3253 fixedly mounted on the outer end of the limiting piece 3252, and a locking spring 3254 fixedly wound around the inner end of the limiting piece 3252 and connected to the power mounting base 321. The locking spring 3254 drives the limiting piece 3252 to rotate counterclockwise around the hinge seat 3251 by its elastic force, so that the locking block 3253 extends into the limiting groove 14. A pull cable 3255 is provided at the end of the limiting piece 3252 away from the locking block 3253, for the operator to pull the limiting piece 3252 to rotate clockwise.

[0032] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A boiler furnace maintenance ash collection platform, characterized in that: The system includes a support frame, a support base plate, and a suspension assembly. The shape of the support frame is adapted to the shape of the manhole on the boiler, and the support frame can be inserted into the boiler furnace through the manhole. Several support base plates are laid along the length of the support frame on the inner bottom side, allowing operators to stand on them. The suspension assembly includes a support component and a power component. The support component includes a suspension mounting seat detachably mounted on the upper end of the support frame, a suspension support rod slidably mounted on the suspension mounting seat along the width direction of the support frame, and an electronic brake fixedly mounted on the suspension mounting seat. A pressure sensor is provided at the end of the suspension support rod, and the pressure sensor is electrically connected to the electronic brake. A brake pad is fixedly mounted along the length direction on the side wall of the suspension support rod, and the electronic brake is sleeved on the outside of the brake pad. When the suspension support rod abuts against the inner wall of the boiler furnace, the pressure sensor sends an electrical signal to the electronic brake, and the electronic brake clamps the brake pad. The power component includes a power mounting base slidably disposed on the upper part of the support frame along its length, a transmission rack disposed on the side wall of the suspension support rod along its length, a servo motor fixedly disposed on the power mounting base and electrically connected to the pressure sensor, a transmission gear fixedly sleeved on the output end of the servo motor and meshing with the transmission rack, and a locking mechanism disposed between the power mounting base and the support frame for locking the power mounting base and the support frame in place. When the suspension support rod abuts against the inner wall of the boiler furnace, the pressure sensor sends an electrical signal to the servo motor, and the servo motor stops operating.

2. The ash collection platform for boiler furnace maintenance according to claim 1, characterized in that: The transmission gear includes an inner gear ring fixedly sleeved on the output end of the servo motor and an outer gear ring rotatably sleeved on the outside of the inner gear ring. The outer wall of the inner gear ring has a plurality of mounting grooves evenly distributed circumferentially. Each mounting groove is provided with an elastic sliding unit. The inner wall of the outer gear ring has a transmission groove that corresponds to and communicates with each mounting groove. The outer end of the elastic sliding unit extends into the transmission groove to drive the outer gear ring and the inner gear ring to rotate synchronously.

3. The ash collection platform for boiler furnace maintenance according to claim 2, characterized in that: The elastic sliding unit includes a support spring disposed inside the mounting groove and a sliding protrusion slidably disposed in the mounting groove. The inner end of the sliding protrusion abuts against the outer end of the support spring, and the outer end of the sliding protrusion abuts against the inner wall of the transmission groove under the elastic force of the support spring. The outer end of the sliding protrusion is hemispherical, and the shape of the transmission groove is adapted to the shape of the outer end of the sliding protrusion.

4. The ash collection platform for boiler furnace maintenance according to claim 1, characterized in that: An assembly groove is provided on the outer end of the suspension support rod along its length. The pressure sensor is located inside the assembly groove. An assembly rod is slidably arranged in the assembly groove. The outer end of the assembly rod protrudes from the assembly groove and is fixedly provided with a roller mounting seat. A support roller is rotatably arranged on the outer end of the roller mounting seat. The support roller is perpendicular to the boiler furnace.

5. The ash collection platform for boiler furnace maintenance according to claim 4, characterized in that: A return spring is fitted on the assembly rod. One end of the return spring abuts against the roller mounting seat, and the other end abuts against the inner wall of the assembly groove. The return spring drives the assembly rod away from the pressure sensor through its elastic force.

6. The ash collection platform for boiler furnace maintenance according to claim 1, characterized in that: The upper sidewall of the support frame is provided with a plurality of limiting grooves evenly distributed along its length. The locking mechanism includes a hinge seat fixedly mounted on the power mounting base, a limiting piece hinged to the hinge seat, a locking block fixedly mounted on the outer end of the limiting piece, and a locking spring fixedly wound around the inner end of the limiting piece and connected to the power mounting base. The locking spring drives the limiting piece to rotate counterclockwise around the hinge seat by its elastic force, so that the locking block extends into the limiting groove. The end of the limiting piece away from the locking block is provided with a pull cable for the operator to pull the limiting piece to rotate clockwise.

7. The ash collection platform for boiler furnace maintenance according to claim 1, characterized in that: The support frame includes two symmetrically arranged main support plates, a support base fixedly arranged between the two main support plates, and two symmetrically arranged side support plates. An adjusting guide sleeve is fixedly arranged at the lower end of the support base along its width direction. The outer end of the adjusting guide sleeve protrudes from the side edge of the support base. An adjusting guide rod is fixedly arranged at the lower end of the side support plate. The inner end of the adjusting guide rod is slidably arranged in the adjusting guide sleeve. A locking bolt is threadedly connected to the upper end of the adjusting guide sleeve. The threaded section of the locking bolt abuts against the adjusting guide rod. The support frame also includes an auxiliary base plate, which is engaged with the upper part of the adjusting guide rod.

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