A boiler furnace maintenance platform and a maintenance method

Abstract

This invention relates to a boiler furnace maintenance platform and method. The platform includes a base on which a symmetrically arranged fixed plate and a work box are mounted. The method further comprises: a tensioning mechanism mounted on the fixed plate, comprising a tensioning component and a wire rope, the tensioning component being capable of winding or releasing the wire rope; a guide mechanism connected to the tensioning component on the fixed plate, the guide mechanism comprising a guide component and a guide rod through which the wire rope passes; and a locking mechanism located within the work box and connected to the tensioning component, the locking mechanism securing the wire rope after the tensioning component stops moving; and a support mechanism connected to the locking mechanism within the work box, the support mechanism being capable of adjusting the position of the locking mechanism according to the release or winding of the wire rope.

Description

Technical Field

[0001] This invention relates to the field of furnace maintenance, specifically a boiler furnace maintenance platform and maintenance method. Background Technology

[0002] The space in a boiler where fuel combustion takes place, also known as the combustion chamber, is an important component of the boiler's combustion equipment. In modern boilers, the furnace not only converts the chemical energy of the fuel into the thermal energy of the combustion products, but also undertakes the task of organizing the heat exchange within the furnace. Therefore, its structure should ensure that the fuel is completely burned and that the flue gas is cooled to the temperature permissible for safe operation of the boiler's convective heating surfaces at the furnace outlet.

[0003] Currently, furnace maintenance typically involves maintenance personnel standing on a lifting platform, which is then hoisted to the required height via wire rope. However, existing hoisting devices may experience wire rope tangling during the hoisting process, leading to increased wear and tear and potentially increasing the risk of breakage. Furthermore, it is difficult to lock the wire rope after it has been raised to the required height. Summary of the Invention

[0004] The purpose of this invention is to provide a boiler furnace maintenance platform and maintenance method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A boiler furnace maintenance platform includes a base on which symmetrically arranged fixing plates and work boxes are mounted. The platform further comprises:

[0007] A tensioning mechanism is provided on the fixed plate. The tensioning mechanism includes a tensioning component and a steel wire rope. The tensioning component can wind up or release the steel wire rope. The fixed plate is also provided with a guide mechanism connected to the tensioning component. The guide mechanism includes a guide component and a lead rod. The steel wire rope passes through the lead rod. The tensioning component drives the lead rod to move through the guide component.

[0008] A locking mechanism is provided inside the working box and connected to the tensioning assembly. The locking mechanism can fix the wire rope through the tensioning assembly after the tensioning assembly stops moving. The working box is also provided with a support mechanism connected to the locking mechanism. The support mechanism can adjust the position of the locking mechanism according to the release or rewinding of the wire rope.

[0009] As a further embodiment of the present invention: the stretching assembly includes a motor mounted on the working box, a small gear rotatably mounted inside the working box and connected to the output shaft of the motor, and a winding structure disposed on the fixed plate. The winding structure is provided with a large gear meshing with the small gear. The winding structure is connected to the wire rope and the guide assembly, and the winding structure is also connected to the locking mechanism.

[0010] As a further embodiment of the present invention: the winding structure includes a rotating rod rotatably mounted on the fixed plate, a winding roller is provided on the rotating rod, a pulley connected to the wire rope is rotatably mounted on the base, the wire rope is wound on the winding roller, and the rotating rod is connected to the guide assembly and the locking mechanism.

[0011] As a further embodiment of the present invention: the guiding assembly includes a guide roller rotatably mounted on the fixed plate, the guide roller having a guide groove, a belt connected to the rotating rod being fitted on the guide roller, and a guiding structure connected to the guide groove being provided on the fixed plate, the guiding structure being connected to the lead rod.

[0012] As a further embodiment of the present invention: the guide structure includes a guide rod mounted on the fixed plate, a guide sleeve movably mounted on the guide rod, a rhomboid block rotatably mounted on the guide sleeve and engaging with the guide groove, a limit groove is formed on the guide sleeve and connected to the lead rod, and a limit rod is provided on the guide rod and engaging with the limit groove.

[0013] As a further embodiment of the present invention: the locking mechanism includes a turntable mounted on the rotating rod, the turntable having multiple sets of first and second slots arranged equidistantly in a circle, and the working box having a locking assembly connected to the first and second slots, the locking assembly being connected to the support mechanism.

[0014] As a further embodiment of the present invention: the engaging assembly includes a first movable ring mounted on the support mechanism, multiple sets of first limiting blocks mounted on the first movable ring and equidistantly arranged in a circle, and a second movable ring mounted on the support mechanism. The second movable ring is provided with multiple sets of second limiting blocks equidistantly arranged in a circle. The first limiting block and the second limiting block engage with the first slot and the second slot, respectively.

[0015] As a further embodiment of the present invention: the support mechanism includes multiple sets of fixed sleeves installed in the working box and arranged symmetrically, the fixed sleeves having a sliding groove, the working box having a driven component connected to the fixed sleeves and the sliding groove, the driven component having a spring, and the driven component being connected to the first movable ring and the second movable ring.

[0016] As a further embodiment of the present invention: the driven component includes a hollow rod movably installed in the fixed sleeve, a movable rod movably installed in the hollow rod, a cylinder passing through the slide groove on the hollow rod, a spring placed in the hollow rod, and the movable rod connected to the first movable ring and the second movable ring and abutting against the spring.

[0017] A method for maintaining a boiler furnace maintenance platform includes the following steps:

[0018] Step 1: A lifting platform is connected to the wire rope. In the initial state, the lifting platform is located on the ground, and maintenance personnel can stand on the lifting platform.

[0019] Step 2: Adjust the height of the lifting platform according to the location of the furnace to be inspected, move the tensioning component, and pull the lifting platform up with steel wire rope. At the same time, the tensioning component will also drive the guide component to move, and adjust the position of the steel wire rope with the guide rod.

[0020] Step 3: The tensioning component will also drive the locking mechanism to move, and drive the support mechanism to move. When the lifting platform moves to the required position, the tensioning component stops moving. Under the action of the support mechanism, the tensioning component is fixed by the locking mechanism.

[0021] Compared with the prior art, the beneficial effects of the present invention are: under the action of the support mechanism, the tensioning mechanism can be fixed by the locking mechanism, thereby ensuring that the workers will not fall during maintenance. When it is necessary to raise the height of the lifting platform, the tensioning component works and the height of the lifting platform is adjusted by the wire rope. Under the action of the guiding component, the wire rope is neatly wound on the tensioning component. Attached Figure Description

[0022] Figure 1 A schematic diagram of one embodiment of a boiler furnace maintenance platform;

[0023] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 This is a structural schematic diagram of a boiler furnace maintenance platform from another angle in one embodiment.

[0025] Figure 4This is a schematic diagram showing the connection relationship between the tensioning mechanism, guiding mechanism, part of the supporting mechanism, and part of the locking mechanism in one embodiment of a boiler furnace maintenance platform.

[0026] Figure 5 This is a schematic diagram of a half-section of the working box in one embodiment of a boiler furnace maintenance platform.

[0027] Figure 6 An exploded structural diagram of the locking mechanism and the support mechanism in one embodiment of a boiler furnace maintenance platform;

[0028] Figure 7 This is a schematic diagram showing the connection relationship of some locking mechanisms and support mechanisms in one embodiment of a boiler furnace maintenance platform.

[0029] Figure 8 A partial exploded structural diagram of one embodiment of a boiler furnace maintenance platform;

[0030] In the diagram: 1. Base; 2. Fixing plate; 3. Working box; 4. Motor; 5. Small gear; 6. Large gear; 7. Rotating rod; 8. Rewinding roller; 9. Steel wire rope; 10. Belt; 11. Guide roller; 12. Guide groove; 13. Guide rod; 14. Guide sleeve; 15. Diamond block; 16. Lead rod; 17. Pulley; 18. Turntable; 19. No. 1 slot; 20. Fixing sleeve; 21. Slide groove; 22. Hollow rod; 23. Cylinder; 24. Movable rod; 25. Spring; 26. No. 1 movable ring; 27. No. 1 limit block; 28. No. 2 movable ring; 29. ​​No. 2 limit block; 30. No. 2 slot. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0033] Please see Figures 1-8In this embodiment of the invention, a boiler furnace maintenance platform includes a base 1, on which a fixed plate 2 and a work box 3 are symmetrically arranged. The boiler furnace maintenance platform further includes:

[0034] A tensioning mechanism is provided on the fixed plate 2. The tensioning mechanism includes a tensioning component and a steel wire rope 9. The tensioning component can wind up or release the steel wire rope 9. The tensioning component includes a motor 4 fixedly installed on the working box 3, a small gear 5 rotatably installed in the working box 3 and connected to the output shaft of the motor 4, and a winding structure provided on the fixed plate 2. The winding structure is provided with a large gear 6 that meshes with the small gear 5. The winding structure is connected to the steel wire rope 9 and the guide component. The winding structure is also connected to the locking mechanism. The winding structure includes a rotating rod 7 rotatably installed on the fixed plate 2. A winding roller 8 is provided on the rotating rod 7. A pulley 17 connected to the steel wire rope 9 is rotatably installed on the base 1. The steel wire rope 9 is wound on the winding roller 8. The rotating rod 7 is connected to the guide component and the locking mechanism.

[0035] Please see Figure 1 , Figure 3-5 It should be noted that the end of the wire rope 9 furthest from the take-up roller 8 is connected to a lifting platform. In the initial state, the lifting platform is located on the ground, and the worker can stand on the lifting platform and raise the height of the lifting platform by pulling the wire rope 9. At this time, the motor 4 works, driving the pinion 5 to rotate, which in turn drives the gear 6 to rotate. When the gear 6 rotates, it drives the rotating rod 7 to rotate, which in turn drives the take-up roller 8 to rotate, thereby winding the wire rope 9. Under the action of the wire rope 9, the height of the lifting platform is slowly raised. When the lifting platform moves to the required height, the motor 4 stops working. After the maintenance is completed, the output shaft of the motor 4 reverses, causing the lifting platform to return to the ground. The purpose of setting the pinion 5 for transmission is that, since there are maintenance personnel standing on the lifting platform, the overall mass of the lifting platform is relatively large. The pinion 5 can reduce the output torque of the motor 4 to protect the motor 4.

[0036] The fixed plate 2 is also provided with a guide mechanism connected to the tensioning assembly. The guide mechanism includes a guide component and a lead rod 16. The wire rope 9 passes through the lead rod 16. The tensioning assembly drives the lead rod 16 to move through the guide component. The guide component includes a guide roller 11 rotatably mounted on the fixed plate 2. The guide roller 11 has a guide groove 12. A belt 10 connected to the rotating rod 7 is sleeved on the guide roller 11. The fixed plate 2 is provided with a guide structure connected to the guide groove 12. The guide structure is fixedly connected to the lead rod 16. The guide structure includes a guide rod 13 fixedly mounted on the fixed plate 2. A guide sleeve 14 is movably mounted on the guide rod 13. A rhomboid block 15 that engages with the guide groove 12 is rotatably mounted on the guide sleeve 14. A limit groove is provided on the guide sleeve 14 and it is fixedly connected to the lead rod 16. A limit rod that engages with the limit groove is provided on the guide rod 13.

[0037] Please see Figure 1-4 , Figure 8 Furthermore, the wire rope 9 is wound on the take-up roller 8. To ensure that the wire rope 9 does not tangle during winding, it needs to be guided to move along the length of the take-up roller 8, ensuring that the wire rope 9 is neatly wound on the take-up roller 8. When the rotating rod 7 rotates, it drives the guide roller 11 to rotate through the belt 10, thereby driving the guide groove 12 to rotate. The guide groove 12 can be divided into four parts: the first part is the first spiral groove, the second part is the first annular groove connected to the first spiral groove, the third part is the second spiral groove connected to the first annular groove and intersecting with the first spiral groove, and the fourth part is the second annular groove connected to the first spiral groove and the second spiral groove. In the initial state, the rhombus block 15 is located on the first spiral groove. When the guide groove 12 rotates, it drives the rhombus block 15 to move, causing the guide sleeve 14 to move along the guide groove 8. Moving along the length of rod 13, the guide sleeve 14 does not rotate during movement due to the engagement of the limiting groove and the limiting rod, ensuring that the rhomboid block 15 remains within the guide groove 12. When the rhomboid block 15 moves to the position where the first and second spiral grooves connect, its rhomboid shape ensures that it will not detach from the first spiral groove. When the rhomboid block 15 moves into the second annular groove, the guide sleeve 14 moves to the end of its stroke, and the rhomboid block 15 continues to move and enters the second spiral groove. At this time, the guide sleeve 14 moves towards its initial position, and under the action of the lead rod 16, the wire rope 9 winds towards its initial position. When the rhomboid block 15 moves into the first annular groove, the guide sleeve 14 moves back to its initial position. The above steps are repeated to ensure that the wire rope 9 is neatly wound on the take-up roller 8.

[0038] A locking mechanism, disposed within the work box 3 and connected to the tensioning assembly, can fix the steel wire rope 9 via the tensioning assembly after the tensioning assembly stops moving. The locking mechanism includes a turntable 18 fixedly mounted on the rotating rod 7. The turntable 18 has multiple sets of first-order slots 19 and second-order slots 30 arranged equidistantly around its circumference. The work box 3 contains a locking assembly connected to the first-order slots 19 and second-order slots 30. The support mechanism is connected, wherein the engaging assembly includes a first movable ring 26 fixedly installed on the support mechanism, multiple sets of first limiting blocks 27 fixedly installed on the first movable ring 26 and arranged circumferentially at equal intervals, and a second movable ring 28 fixedly installed on the support mechanism. The second movable ring 28 is provided with multiple sets of second limiting blocks 29 arranged circumferentially at equal intervals. The first limiting block 27 and the second limiting block 29 engage with the first slot 19 and the second slot 30, respectively.

[0039] Please see Figure 4-7Furthermore, slot 19 and slot 30 are inclined and connected to the plane of turntable 18. The two slots are opened in opposite directions. Limiting block 27 and limiting block 29 are also inclined and are adapted to slot 19 and slot 30 respectively. In the initial state, under the action of the support mechanism, the second movable ring 28 abuts against turntable 18. At this time, limiting block 29 engages with slot 30. Under the action of the gravity of the lifting platform... When the lifting platform needs to be raised, the rotating rod 7 rotates, driving the turntable 18 to rotate, causing the second slot 30 to move. Under the action of the support mechanism, the inclined surface of the second slot 30 gradually separates from the second limit block 29 until the second limit block 29 abuts against the surface of the turntable 18. The turntable 18 continues to rotate, and under the action of the support mechanism, the second limit block 29 re-enters the second slot 30, repeating the process. The above steps continue until the lifting platform moves to the desired position. Under the action of the lifting platform's gravity, the turntable 18 will rotate a small angle in the opposite direction, causing the second limit block 29 to move again to the end of the stroke of the second slot 30, thereby fixing the turntable 18. When the lifting platform needs to be lowered, the support mechanism moves, causing the second movable ring 28 to separate from the turntable 18 and driving the first movable ring 26 to move to abut against the turntable 18, causing the first limit block 27 to enter the first slot 19 and be located at the end of the stroke of the first slot 19, thereby fixing the turntable 18. At this time, the rotating rod 7 rotates in the opposite direction, causing the lifting platform to lower. As mentioned above, the turntable 18 drives the first slot 19 to move, causing the inclined surface of the first slot 19 to gradually separate from the first limit block 27. After the lifting platform lowers to the desired height, the first limit block 27 enters the first slot 19 again and is located at the end of the stroke of the first slot 19, thereby fixing the turntable 18.

[0040] The working box 3 is also provided with a support mechanism connected to the locking mechanism. The support mechanism can adjust the position of the locking mechanism according to the release or rewinding of the wire rope 9. The support mechanism includes multiple sets of fixed sleeves 20 fixedly installed in the working box 3 and arranged symmetrically. The fixed sleeves 20 are provided with sliding grooves 21. The working box 3 is provided with a driven component connected to the fixed sleeves 20 and the sliding grooves 21. The driven component is provided with a spring 25. The driven component is fixedly connected to the first movable ring 26 and the second movable ring 28. The driven component includes a hollow rod 22 movably installed in the fixed sleeves 20. A movable rod 24 is movably installed in the hollow rod 22. A cylinder 23 is provided on the hollow rod 22 and passes through the sliding groove 21. The spring 25 is placed in the hollow rod 22. The movable rod 24 is fixedly connected to the first movable ring 26 and the second movable ring 28 and abuts against the spring 25.

[0041] Please see Figure 4-7 Finally, the position of the hollow rod 22 can be adjusted by the cylinder 23 according to the lifting platform's ascent or descent. When it needs to rise, the cylinder 23 operates and drives the hollow rod 22 to move, thereby driving the movable rod 24 to move, causing the connected second movable ring 28 to move to abut against the turntable 18 and compressing the spring 25. When it needs to descend, the cylinder 23 causes the second movable ring 28 to separate from the turntable 18 and drives the first movable ring 26 to abut against the turntable 18. When the turntable 18 rotates, the limit block continuously engages or disengages from the slot, thereby driving the movable ring to reciprocate. The movable ring will drive the movable rod 24 to reciprocate within the hollow rod 22 and compress the spring 25. When the turntable 18 stops rotating, the spring 25 ensures that the limit block engages with the slot.

[0042] A method for maintaining a boiler furnace maintenance platform includes the following steps:

[0043] Step 1: A lifting platform is connected to the wire rope 9. In the initial state, the lifting platform is located on the ground, and maintenance personnel can stand on the lifting platform.

[0044] Step 2: Adjust the height of the lifting platform according to the location of the furnace to be inspected, move the tensioning component, and pull the lifting platform up through the wire rope. At the same time, the tensioning component will also drive the guide component to move, and adjust the position of the wire rope 9 through the lead rod 16.

[0045] Step 3: The tensioning component will also drive the locking mechanism to move, and drive the support mechanism to move. When the lifting platform moves to the required position, the tensioning component stops moving. Under the action of the support mechanism, the tensioning component is fixed by the locking mechanism.

[0046] Taking the embodiment combining all the features described in this application as an example, in use, the position of the hollow rod 22 can be adjusted by the cylinder 23 according to the rise or fall of the lifting platform. When it is necessary to rise, the cylinder 23 works and drives the hollow rod 22 to move, thereby driving the movable rod 24 to move, so that the second movable ring 28 connected to it moves to abut against the turntable 18 and puts the spring 25 in a compressed state. At this time, the motor 4 works and drives the small gear 5 to rotate, thereby driving the large gear 6 to rotate. When the large gear 6 rotates, it drives the rotating rod 7 to rotate and drives the winding roller 8 to rotate, thereby winding the wire rope 9. Under the action of the wire rope 9, the height of the lifting platform is slowly raised. At the same time, the rotating rod 7 rotates, driving the rotating rod 8 to rotate. As the turntable 18 rotates, the second slot 30 moves. Under the action of the support mechanism, the inclined surface of the second slot 30 gradually separates from the second limiting block 29 until the second limiting block 29 abuts against the surface of the turntable 18. The turntable 18 continues to rotate, and under the action of the support mechanism, the second limiting block 29 re-enters the second slot 30. The above steps are repeated until the lifting platform moves to the required position. Under the action of the gravity of the lifting platform, the turntable 18 will rotate in the opposite direction by a small angle, causing the second limiting block 29 to move to the end of the stroke of the second slot 30, thereby fixing the turntable 18. When the rotating rod 7 rotates, it drives the guide roller 11 to rotate through the belt 10, thereby driving the guide groove 12 to rotate.

[0047] The guide groove 12 can be divided into four parts: the first part is the first spiral groove; the second part is the first annular groove connected to the first spiral groove; the third part is the second spiral groove connected to the first annular groove and intersecting with the first spiral groove; and the fourth part is the second annular groove connected to both the first and second spiral grooves. Initially, the rhombus block 15 is located on the first spiral groove. When the guide groove 12 rotates, it drives the rhombus block 15 to move, causing the guide sleeve 14 to move along the length of the guide rod 13. Because the limiting groove engages with the limiting rod, the guide sleeve 14 does not rotate during movement, ensuring that the rhombus block 15 remains within the guide groove 12. When the rhombus block 15 moves to the position where the first and second spiral grooves connect, its rhombus shape ensures that it will not detach from the first spiral groove. When the rhombus block 15 moves into the second annular groove, the guide... When the sleeve 14 moves to the end of its stroke, the diamond block 15 continues to move and enters the second spiral groove. At this time, the guide sleeve 14 moves toward the initial position. Under the action of the lead rod 16, the wire rope 9 winds toward the initial position. When the diamond block 15 moves into the first annular groove, the guide sleeve 14 moves back to the initial position. The above steps are repeated to ensure that the wire rope 9 is neatly wound on the take-up roller 8. When it is necessary to descend, under the action of the cylinder 23, the second movable ring 28 separates from the turntable 18 and drives the first movable ring 26 to abut against the turntable 18. As mentioned above, at this time, the turntable 18 drives the first slot 19 to move, so that the inclined surface of the first slot 19 gradually separates from the first limit block 27. After the lifting platform descends to the required height, the first limit block 27 re-enters the first slot 19 and is located at the end of the stroke of the first slot 19, thereby fixing the turntable 18.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A boiler furnace overhauling platform, comprising a base, a fixed plate and a working box symmetrically arranged on the base, characterized in that, The boiler furnace maintenance platform further comprises: A stretching mechanism is arranged on the fixed plate, the stretching mechanism comprises a stretching assembly and a steel wire rope, the stretching assembly can wind or release the steel wire rope, a guide mechanism connected with the stretching assembly is further arranged on the fixed plate, the guide mechanism comprises a guide assembly and a lead wire rod, the steel wire rope passes through the lead wire rod, and the stretching assembly drives the lead wire rod to move through the guide assembly; A locking mechanism is arranged in the working box and connected with the stretching assembly, the locking mechanism can fix the steel wire rope through the stretching assembly after the stretching assembly stops moving, and a supporting mechanism connected with the locking mechanism is further arranged in the working box, the supporting mechanism can adjust the position of the locking mechanism according to the winding or releasing of the steel wire rope; The stretching assembly comprises a motor mounted on the working box, a pinion gear rotatably mounted in the working box and connected with the output shaft of the motor, and a winding structure arranged on the fixed plate, the winding structure is provided with a large gear meshing with the pinion gear, the winding structure is connected with the steel wire rope and the guide assembly, and the winding structure is further connected with the locking mechanism; The winding structure comprises a rotating rod rotatably mounted on the fixed plate, the rotating rod is provided with a winding roller, a pulley connected with the steel wire rope is rotatably mounted on the base, the winding roller is wound with the steel wire rope, and the rotating rod is connected with the guide assembly and the locking mechanism; The locking mechanism comprises a rotating disc fixedly mounted on the rotating rod, a plurality of groups of first clamping grooves and second clamping grooves are arranged on the rotating disc in a circumferential equidistant manner, a clamping assembly connected with the first clamping grooves and the second clamping grooves is arranged in the working box, and the clamping assembly is connected with the supporting mechanism; The clamping assembly comprises a first movable ring mounted on the supporting mechanism, a plurality of groups of first limiting blocks mounted on the first movable ring and arranged in a circumferential equidistant manner, and a second movable ring mounted on the supporting mechanism, the second movable ring is provided with a plurality of groups of second limiting blocks arranged in a circumferential equidistant manner, and the first limiting blocks and the second limiting blocks are clamped with the first clamping grooves and the second clamping grooves respectively; The supporting mechanism comprises a plurality of groups of fixed sleeves mounted in the working box and arranged in a symmetrical manner, a sliding groove is arranged on the fixed sleeve, a driven assembly connected with the fixed sleeve and the sliding groove is arranged in the working box, a spring is arranged in the driven assembly, and the driven assembly is connected with the first movable ring and the second movable ring.

2. A boiler furnace access platform according to claim 1, characterised in that, The guide assembly comprises a guide roller rotatably mounted on the fixed plate, a guide groove is arranged on the guide roller, a belt connected with the rotating rod is sleeved on the guide roller, a guide structure connected with the guide groove is arranged on the fixed plate, and the guide structure is connected with the lead wire rod.

3. A boiler furnace access platform according to claim 2, characterised in that, The guide structure comprises a guide rod mounted on the fixed plate, a guide sleeve movably mounted on the guide rod, a rhombic block rotatably mounted on the guide sleeve and clamped with the guide groove, a limiting groove is arranged on the guide sleeve and connected with the lead wire rod, and a limiting rod clamped with the limiting groove is arranged on the guide rod.

4. A boiler furnace access platform according to claim 1, wherein, The driven assembly comprises a hollow rod movably mounted in the fixed sleeve, a movable rod movably mounted in the hollow rod, a pneumatic cylinder penetrating through the sliding groove is arranged on the hollow rod, the spring is arranged in the hollow rod, and the movable rod is connected with the first movable ring and the second movable ring and abuts against the spring.

5. A method of inspecting a boiler furnace by using the boiler furnace inspection platform according to claim 1, characterized by, The method comprises the following steps: Step one: the steel wire rope is connected with a lifting platform, in the initial state, the lifting platform is on the ground, the maintenance personnel stand on the lifting platform; Step two: according to the position of the furnace required for maintenance, the height of the lifting platform is adjusted, the stretching assembly moves, and the lifting platform is pulled up through the steel wire rope, at the same time, the stretching assembly also drives the guide assembly to move, and the position of the steel wire rope is adjusted through the guide rod; Step three: the stretching assembly also drives the locking mechanism to move, and drives the supporting mechanism to move, when the lifting platform moves to the required position, the stretching assembly stops moving at this time, and the stretching assembly is fixed through the locking mechanism under the action of the supporting mechanism.

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