Lifting platform for overhauling boiler equipment in power plant

Abstract

The invention provides a power plant boiler equipment overhaul lifting platform, and relates to the technical field of financial management equipment.The power plant boiler equipment overhaul lifting platform comprises a base, a protection mechanism is fixedly arranged on the surface of the base and comprises a supporting frame and a mounting frame, and a first supporting rod and a second supporting rod are arranged on the surface of the mounting frame; the surface of the first supporting rod and the surface of the second supporting rod are slidably connected with sliding blocks, first springs are arranged between the sliding blocks and the mounting frame, the surface of the second supporting rod is slidably sleeved with a plurality of connecting rings, one connecting ring is fixedly connected with the sliding blocks, and the tops of the connecting rings are fixedly connected with a protective net. A first connecting rope is arranged on the upper surface of the sliding block, a limiting frame is arranged on the surface of the base, a lifting table is slidably connected to the surface of the limiting frame, the other end of the first connecting rope is fixedly connected with the lifting table, a lifting mechanism is arranged on the lower surface of the lifting table, and the lifting mechanism can rapidly and safely ascend and descend by the target height.

Description

Technical Field

[0001] The present invention relates to the technical field of financial management equipment, and in particular to a lifting platform for maintenance of boiler equipment in a power plant. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The original meaning of a pot refers to a water container heated on fire, and a furnace refers to a place where fuel is burned. A boiler includes two major parts: a pot and a furnace. The hot water or steam produced in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. A boiler that provides hot water is called a hot water boiler, which is mainly used for life and has a small number of applications in industrial production. A boiler that produces steam is called a steam boiler, often referred to as a boiler, and is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises. A lifting device for boiler maintenance is a mechanical device that helps maintenance personnel rise to the maintenance site during boiler maintenance. For long-term use of a boiler, it is necessary to regularly inspect the various components of the boiler to ensure the normal operation of the boiler.

[0003] When a power plant boiler breaks down, maintenance personnel usually have to climb up a ladder to inspect the boiler, but it is impossible to quickly rise to inspect the boiler.

[0004] The existing power plant boiler equipment maintenance lifting platform drives the staff to the specified height through the lifting platform to complete the maintenance work. However, during the work process, the staff may step on empty space when moving back and forth along the lifting platform, which may easily cause harm to the staff and has a low safety factor. For this reason, we propose a power plant boiler equipment maintenance lifting platform. Summary of the invention

[0005] The present invention provides a lifting platform for overhauling boiler equipment in a power plant, which is used to solve the technical problems raised by the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides a power plant boiler equipment maintenance lifting platform, including: a power plant boiler equipment maintenance lifting platform, characterized in that it includes: a base, a protective mechanism is fixedly provided on the surface of the base, the protective mechanism includes a support frame and a mounting frame, a first support rod and a second support rod are provided on the surface of the mounting frame, a sliding block is slidably connected to the surfaces of the first support rod and the second support rod, a first spring is provided between the sliding block and the mounting frame, a surface sliding sleeve of the second support rod is provided with a plurality of connecting rings, one of the connecting rings is fixedly connected to the sliding block, the top of the connecting ring is fixedly connected to the protective net, a first connecting rope is provided on the upper surface of the sliding block, a limiting frame is provided on the surface of the base, a lifting platform is slidably connected to the surface of the limiting frame, the other end of the first connecting rope is fixedly connected to the lifting platform, and a lifting mechanism is provided on the lower surface of the lifting platform.

[0007] Preferably, the bottom end of the base is respectively fixed with a support frame and a mounting frame; the first spring is sleeved on the surface of the first support rod, the other ends of the first support rod and the second support rod are fixedly connected to the support frame, the first support rod limits the first spring, and the first support rod and the second support rod are installed on the support frame.

[0008] Preferably, the surface of the mounting frame is rotatably connected to a rotating rod via a damping bearing, and winding wheels are provided at both ends of the rotating rod. A second connecting rope is wound around the surface of the winding wheel, and the other end of the second connecting rope is fixedly connected to the sliding block. The winding wheel is used to wind up the second connecting rope, and the winding wheel is provided with a damping bearing.

[0009] Preferably, a plurality of guide rollers are provided on the surfaces of the base and the lifting platform, and the first connecting rope is slidably connected to the guide rollers.

[0010] Preferably, the lifting mechanism includes: a first fixed seat, the first fixed seat is fixedly connected to the left side of the top of the base, the center of the first fixed seat is rotatably connected to the first support plate via a rotating shaft, a pair of first slide rails along the left and right directions are fixedly arranged on the top of the base, a first sliding seat is slidably connected to the first slide rails left and right, the center of the first sliding seat is rotatably connected to the second support plate via a bearing, a pair of second slide rails along the left and right directions are fixedly arranged at the bottom end of the lifting platform, a second fixed seat is fixedly arranged on the left side of the bottom end of the lifting platform, and the second slide rails are slidably connected to the second sliding seat left and right.

[0011] Preferably, the first support plate is rotatably connected to the second sliding seat via a rotating shaft, the second support plate is rotatably connected to the second fixed seat via a rotating shaft, the center of the first support plate is rotatably connected to a connecting rod via a bearing, the connecting rod is used to connect the first support plate and the second support plate, the front and rear ends of the connecting rod are rotatably connected to the second support plate via bearings; the top of the base is fixedly connected to a positioning seat, the surface of the positioning seat is rotatably connected to a threaded rod via a bearing, the threaded rod is threadedly connected to a threaded seat, and the threaded seat is fixedly connected to the first sliding seat.

[0012] Preferably, a motor is fixedly installed on the top left end of the base, and the output end of the motor is fixedly connected to the threaded rod; the center of the rotating rod is fixedly connected to the first gear, and the center of the bottom of the base is fixedly connected to a mounting seat, and the center of the mounting seat is rotatably connected to a positioning rod through a bearing, the rear end of the positioning rod is fixedly connected to the second gear, and the second gear is meshingly connected to the first gear, and the front end of the connecting rod is fixedly connected to a rotating handle, and the diameter of the second gear is larger than the diameter of the first gear.

[0013] Preferably, a positioning block is provided on the lower surface of the base, a second spring is provided on the surface of the positioning block, a trapezoidal block is provided at the other end of the second spring, a slot for the trapezoidal block to be engaged is provided on the upper surface of the sliding block, and the arranged trapezoidal block can be engaged in the slot of the sliding block;

[0014] Preferably, it also includes:

[0015] Angle sensor, used for the working angle between the first support plate and the second support plate and the base plane;

[0016] The pressure sensor is used to detect the load pressure value in the vertical direction when the lifting platform surface is working;

[0017] A distance sensor, used for detecting a sliding distance value of the first sliding seat on the first sliding rail;

[0018] An alarm module for responding to alarms in abnormal situations;

[0019] Create a coordinate module to establish a coordinate system, define the positive direction of the x-axis from left to right and the positive direction of the y-axis from bottom to top;

[0020] A calculation module 1 is used to calculate the actual support force of the threaded rod and the Euler critical force of the lifting mechanism in the x-axis direction based on the angle value of the angle sensor and the load pressure value of the pressure sensor;

[0021] The calculation module 2 is used to calculate the abnormal evaluation value of the load strength of the lifting mechanism based on the calculation module 1;

[0022] A comparison processing module is used to compare the result obtained by the calculation module 2 with the real-time flow rate of the cooling water;

[0023] The control judgment module, when the abnormal load strength evaluation value of the lifting mechanism is greater than 0, the device works normally, and when the abnormal load strength evaluation value of the lifting mechanism is less than or equal to 0, the control alarm module sounds an alarm.

[0024] Preferably, including:

[0025] The calculation module 1 calculates based on the following formula 1:

[0026] Where: F is the actual support force of the threaded rod on the lifting platform during operation, N is the vertical load pressure on the lifting platform surface detected by the pressure sensor, m1 is the mass of the lifting platform itself; g is the acceleration of gravity, which is 9.81; α is the working angle between the first support plate and the second support plate and the base plane detected by the angle sensor; m l is the total mass of the first support plate and the second support plate; l is the length of the first support plate and the second support plate, cos is the cosine function; L is the sliding distance value of the first sliding seat detected by the distance sensor; N Ex is the Euler critical force of the lifting mechanism in the x-axis direction, E is the elastic modulus of the support plate, λ h is the equivalent slenderness ratio, S is the sum of the cross-sectional areas of the support plates in the lifting mechanism;

[0027] The calculation module 2 is calculated based on the following formula 2:

[0028] Where: K is the abnormal load strength assessment value of the lifting mechanism, [σ] is the theoretical stress strength value of the first support plate and the second support plate 300MPa, C 1x , C 1y N is the reduction factor of the bending moment at the end of the lifting platform, which is always 1; Ey is the Euler critical force in the y-axis direction of the lifting mechanism, N Ey =1.5N Ex ;M 1x 、M 1y W is the bending moment at the connection between the upper end of the lifting platform and the support plate; 1x is the bending modulus of the support plate in the x direction, W 1y is the bending modulus of the lifting mechanism in the y direction; C my is the bending moment stability coefficient, which is taken as 1, γ is the stability coefficient of the lifting platform when it is under pressure, ψ is the correction coefficient, which is taken as 1, and sin is the sine function.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention proposes a lifting platform for overhauling boiler equipment in a power plant. By setting a protective mechanism, during the lifting platform ascending, the first spring pushes the sliding block to move and drives the connecting ring to move. At this time, the protective net can be opened. The protective net can protect the staff on the lifting platform and improve the overall safety of the device.

[0031] 2. The present invention provides a lifting mechanism, and the lifting platform is pushed up and down by the first support plate and the second support plate, so that the staff on the lifting platform can be quickly raised to a designated position, which is convenient for the staff to inspect and repair the boiler equipment at different heights, and the operation is simple and fast;

[0032] 3. The present invention proposes a lifting platform for the maintenance of boiler equipment in a power plant. By arranging a trapezoidal block on the positioning block, the trapezoidal block can be pushed away from the slot when the lifting platform is just rising, so that the protective net can be quickly opened, thereby further improving the protective effect and preventing the staff from falling from both sides of the device due to unstable center of gravity during the rising process, thereby preventing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a schematic diagram of the main structure of the lifting platform for overhauling boiler equipment in a power plant according to the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the power plant boiler equipment maintenance lifting platform of the present invention when viewed from above;

[0036] Figure 3 It is a top-sectional schematic diagram of a lifting platform for overhauling boiler equipment in a power plant according to the present invention;

[0037] Figure 4 for Figure 1 The enlarged structural diagram at A in the middle;

[0038] Figure 5 It is a partial cross-sectional structural schematic diagram of the positioning block of the power plant boiler equipment maintenance lifting platform of the present invention.

[0039] Reference numerals:

[0040] 1. Base; 2. Protection mechanism; 201. Support frame; 202. Mounting frame; 203. First support rod; 204. Second support rod; 205. Sliding block; 206. First spring; 207. Connecting ring; 208. Protection net; 209. First connecting rope; 210. Limiting frame; 211. Lifting platform; 3. Rotating rod; 4. Winding wheel; 5. Second connecting rope; 6. Guide roller; 7. Lifting mechanism; 701. First fixed seat; 702. A support plate; 703, a first slide rail; 704, a first sliding seat; 705, a second support plate; 706, a second slide rail; 707, a second fixed seat; 708, a second sliding seat; 8, a connecting rod; 9, a positioning seat; 10, a threaded rod; 11, a threaded seat; 12, a motor; 13, a first gear; 14, a mounting seat; 15, a positioning rod; 16, a second gear; 17, a rotating handle; 18, a positioning block; 19, a second spring; 20, a trapezoidal block. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The present invention provides the following embodiments

[0045] Embodiment 1, the present invention provides a power plant boiler equipment maintenance lifting platform, such as Figure 1-5As shown, it includes: a base 1, a protective mechanism 2 is arranged on the surface of the base 1, the protective mechanism 2 includes a support frame 201 and a mounting frame 202, a first support rod 203 and a second support rod 204 are arranged on the surface of the mounting frame 202, the surfaces of the first support rod 203 and the second support rod 204 are slidably connected with a sliding block 205, a first spring 206 is arranged between the sliding block 205 and the mounting frame 202, a surface sliding sleeve of the second support rod 204 is provided with a plurality of connecting rings 207, one of the connecting rings 207 is fixedly connected with the sliding block 205, a protective net 208 is arranged on the surface of the connecting ring 207, a first connecting rope 209 is arranged on the upper surface of the sliding block 205, a limiting frame 210 is arranged on the surface of the limiting frame 210, a lifting platform 211 is slidably connected with the surface of the limiting frame 210, the other end of the first connecting rope 209 is fixedly connected with the lifting platform 211, and a lifting mechanism 7 is arranged on the lower surface of the lifting platform 211.

[0046] The working principle and beneficial effects of the above technical solution are as follows: when the first connecting rope 209 pulls the sliding block 205, the first spring 206 pushes the sliding block 205 to move, so that the connecting block close to the sliding block 205 moves quickly, and the sliding block 205 drives one of the connecting rings 207 to move, and the protective net 208 can be opened at this time. During the opening process of the protective net 208, the multiple connecting rings 207 support the protective net 208, thereby improving the receiving effect of the protective net 208. The set limit frame 210 can limit the lifting platform 211, so that the lifting platform 211 can rise stably, and the overall safety performance of the device is improved, and the use effect of the device is increased;

[0047] The present invention provides a power plant boiler equipment maintenance lifting platform, which is provided with a protection mechanism. During the lifting process of the lifting platform, the first spring pushes the sliding block to move, and drives the connecting ring to move. At this time, the protection net can be opened. The provided protection net can protect the staff on the lifting platform, thereby improving the overall safety of the device.

[0048] The present invention provides a lifting mechanism, and the lifting platform is pushed up and down by the first support plate and the second support plate, so that the staff on the lifting platform can be quickly lifted to a designated position, which is convenient for the staff to inspect and repair the boiler equipment at different heights, and the operation is simple and fast.

[0049] The present invention proposes a lifting platform for maintenance of boiler equipment in a power plant. A trapezoidal block is arranged on a positioning block so that when the lifting platform is just rising, the trapezoidal block can be pushed away from a slot, so that a protective net can be quickly opened, thereby further improving the protective effect and preventing workers from falling from both sides of the device due to unstable center of gravity during the rising process, thereby preventing safety hazards.

[0050] Embodiment 2, on the basis of embodiment 1, as Figure 1-Figure 3As shown, the bottom end of the base 1 is fixedly mounted with a support frame 201 and a mounting frame 202 respectively; the first spring 206 is sleeved on the surface of the first support rod 203, the other ends of the first support rod 203 and the second support rod 204 are fixedly connected to the support frame 201, the first support rod 203 limits the first spring 206, and the first support rod 203 and the second support rod 204 are mounted on the support frame 201;

[0051] The surface of the mounting frame 202 is rotatably connected with a rotating rod 3 via a damping bearing, and winding wheels 4 are provided at both ends of the rotating rod 3. A second connecting rope 5 is wound around the surface of the winding wheel 4, and the other end of the second connecting rope 5 is fixedly connected to the sliding block 205. The winding wheel 4 is used to wind up the second connecting rope 5, and the winding wheel 4 is provided with a damping bearing;

[0052] The lifting mechanism 7 includes: a first fixed seat 701, the first fixed seat 701 is fixedly connected to the left side of the top of the base 1, the center of the first fixed seat 701 is rotatably connected to the first support plate 702 through a rotating shaft, a pair of first slide rails 703 along the left and right directions are fixedly arranged on the top of the base 1, a first sliding seat 704 is slidably connected to the first slide rail 703, the center of the first sliding seat 704 is rotatably connected to the second support plate 705 through a bearing, a pair of second slide rails 706 along the left and right directions are fixedly arranged at the bottom end of the lifting platform 211, a second fixed seat 707 is fixedly arranged on the left side of the bottom end of the lifting platform 211, and the second slide rail 706 is slidably connected to the second slide seat 708

[0053] The first support plate 702 is rotatably connected to the second sliding seat 708 through a rotating shaft, the second support plate 705 is rotatably connected to the second fixed seat 707 through a rotating shaft, the center of the first support plate 702 is rotatably connected to a connecting rod 8 through a bearing, the connecting rod 8 is used to connect the first support plate 702 and the second support plate 705, and the front and rear ends of the connecting rod 8 are rotatably connected to the second support rod 204 through bearings; the top of the base 1 is fixedly connected to a positioning seat 9, the surface of the positioning seat 9 is rotatably connected to a threaded rod 10 through a bearing, the threaded rod 10 is threadedly connected to a threaded seat 11, and the threaded seat 11 is fixedly connected to the first sliding seat 704. .

[0054] The working principle and beneficial effects of the above technical solution are as follows: the first support rod 203 can limit the first spring 206, so that the first spring 206 is more stable when it is extended and retracted, and the first support rod 203 and the second support rod 204 are installed on the support frame 201, so that the supporting effect is better, the support frame 201 and the mounting frame 202 are installed below the base 1, which can improve the neatness of the device surface and avoid damage to parts during construction. The winding wheel 4 can wind up the second connecting rope 5, and a damping bearing is provided, so that when the rotating rod 3 is not rotated by external force, the self-rotation of the rotating rod 3 can be reduced, the storage effect of the second connecting rope 5 is improved, and the practicality of the device is improved. The guide roller 6 is provided to facilitate controlling the direction of the connecting rope, so that the first connecting rope 209 is close to the device, so that the space utilization rate is improved, and the damage of the first connecting rope 209 is effectively avoided. The lifting mechanism 7 is provided, through the first support rod 2 03 and the second support plate 705 rotate, which can drive the lifting plate to rise and fall, which is convenient for adjusting the height of the lifting platform 211 and improving the maintenance effect of the staff. The connecting rod 8 can connect the first support plate 702 and the second support plate 705, so that it is more stable when rotating. The threaded rod 10 can drive the threaded seat 11 to move when it rotates, so as to push the first sliding seat 704 to move. The first sliding seat 704 drives the bottom of the second support plate 705 to move. Through the cooperation of the first support plate 702, the second support plate 705 can be driven to rotate. The motor 12 can drive the threaded rod 10 to rotate, which improves work efficiency and saves time and effort in operation. The rotating handle 17 is convenient for driving the positioning rod 15 to rotate. Through the cooperation of the second gear 16 and the first gear 13, the rotating rod 3 can be driven to rotate. The diameter of the second gear 16 is larger than the diameter of the first gear 13, thereby improving the winding efficiency, so that the second connecting rope 5 can be quickly collected.

[0055] Embodiment 3, on the basis of embodiment 2, as Figure 1-Figure 5 As shown, a motor 12 is fixedly installed at the top left end of the base 1, and the output end of the motor 12 is fixedly connected to the threaded rod 10; the center of the rotating rod 3 is fixedly connected to the first gear 13, and the center of the bottom of the base 1 is fixedly connected to the mounting seat 14, and the center of the mounting seat 14 is rotatably connected to a positioning rod 15 through a bearing, and the rear end of the positioning rod 15 is fixedly connected to a second gear 16, and the second gear 16 is meshed and connected with the first gear 13, and the front end of the connecting rod 8 is fixedly connected to a rotating handle 17, and the diameter of the second gear 16 is larger than the diameter of the first gear 13;

[0056] A positioning block 18 is provided on the lower surface of the base 1, a second spring 19 is provided on the surface of the positioning block 18, a trapezoidal block 20 is provided at the other end of the second spring 19, and a slot for the trapezoidal block 20 to be engaged is provided on the upper surface of the sliding block 205, and the set trapezoidal block 20 can be engaged in the slot of the sliding block 205.

[0057] The working principle and beneficial effects of the above technical solution are as follows: the set trapezoidal block 20 can be stuck in the slot of the sliding block 205. When the lifting platform 211 rises, the first connecting rope 209 pulls the sliding block 205, which can push the trapezoidal block 20 away from the slot, so that the protective net 208 can be quickly opened, further improving the protection effect. When the sliding block 205 moves to the bottom of the positioning block 18, the edge of the positioning block 18 drives the trapezoidal block 20 to move upward. At this time, the second spring 19 is compressed. When the sliding block 205 moves to the bottom of the trapezoidal block 20, the second spring 19 drives the trapezoidal block 20 to re-enter the slot opened on the sliding block 205 to achieve a storage effect. At this time, multiple connecting rings 207 are close together and the protective net 208 is folded. The folded protective net 208 is stored at the bottom of the base 1, which can prevent the protective net 208 from being damaged by the outside when not in use, thereby improving the storage effect.

[0058] After the staff member stands on the lifting platform 211, the motor 12 drives the threaded rod 10 to rotate, the threaded rod 10 drives the threaded seat 11 to move, and the threaded seat 11 drives the two first sliding seats 704 to move along the two first slide rails 703, at which time the second support plate 705 can be driven to rotate, and the second support plate 705 can drive the first support plate 702 to rotate synchronously through the rotating rod 3. At this time, the second support plate 705 and the first support plate 702 drive the second fixed seat 707 and the second sliding seat 708 to move upward, and the second fixed seat 707 and the second sliding seat 708 drive the lifting platform 211 along The limit frame 210 moves upward to a required height, which is convenient for the staff to inspect the boiler equipment at different heights and improve the work efficiency. When the lifting platform 211 rises, the first connecting rope 209 is guided by multiple guide rollers 6 to drive the sliding block 205 to move along the direction of the first support rod 203 and the second support rod 204. Since the side of the trapezoidal block 20 is arranged in a cross-section, when the first connecting rope 209 pulls the sliding block 205, the trapezoidal block 20 can be pushed out of the inside of the card slot. At this time, the first spring 206 set pushes the sliding block 205 to move, so that the sliding block 205 is close to the sliding block 205. The connecting block moves quickly, and the protective net 208 can be opened at this time to improve the safety of the device. When the staff leaves the device, by turning the rotating handle 17, the positioning rod 15 is driven to rotate, the positioning rod 15 drives the second gear 16 to rotate, the second gear 16 drives the first gear 13 to rotate, the first gear 13 drives the rotating rod 3 to rotate, and the rotating rod 3 can drive the winding wheels 4 on both sides to reel in the second connecting rope 5. When the sliding block 205 moves to the bottom of the positioning block 18, the edge of the positioning block 18 drives the trapezoidal block 20 to move upward, and the second spring 19 is compressed at this time, and the sliding block 20 When the sliding block 205 moves to the bottom of the trapezoidal block 20, the second spring 19 drives the trapezoidal block 20 to re-enter the slot on the sliding block 205 to achieve the storage effect. At this time, the multiple connecting rings 207 are close together and the protective net 208 is folded. The folded protective net 208 is stored at the bottom of the base 1, which can prevent the protective net 208 from being damaged by the outside when not in use, thereby improving the storage effect. At the same time, the rotating rod 3 is installed on the mounting frame 202 through the damping bearing, which can prevent the rotating rod 3 from rotating when the device as a whole moves, causing the second connecting rope 5 to be loosened.

[0059] Embodiment 4, based on embodiment 1, further includes: an angle sensor for detecting a working angle between the first support plate 702 and the second support plate 705 and the plane of the base 1;

[0060] A pressure sensor is used to detect the load pressure value in the vertical direction when the lifting platform 211 is working;

[0061] A distance sensor, used for detecting a sliding distance value of the first sliding seat 704 on the first sliding rail 703;

[0062] An alarm module for responding to alarms in abnormal situations;

[0063] Create a coordinate module to establish a coordinate system, define the positive direction of the x-axis from left to right and the positive direction of the y-axis from bottom to top;

[0064] A calculation module 1 is used to calculate the actual support force of the threaded rod 10 on the lifting platform 211 and the Euler critical force in the x-axis direction of the lifting mechanism 7 based on the angle value of the angle sensor and the load pressure value of the pressure sensor;

[0065] A calculation module 2 is used to calculate the abnormal load strength evaluation value of the lifting mechanism 7 based on the calculation module 1;

[0066] A comparison processing module is used to compare the result obtained by the calculation module 2 with the real-time flow rate of the cooling water;

[0067] The control judgment module, when the abnormal load strength evaluation value of the lifting mechanism 7 is greater than 0, the device works normally, and when the abnormal load strength evaluation value of the lifting mechanism 7 is less than or equal to 0, the control alarm module sounds an alarm;

[0068] The calculation module 1 calculates based on the following formula 1:

[0069] Where: F is the actual supporting force of the threaded rod 10 on the lifting platform 211 during operation, N is the vertical load pressure on the surface of the lifting platform 211 detected by the pressure sensor, m1 is the mass of the lifting platform 211 itself; g is the acceleration of gravity, which is 9.81; α is the working angle between the first support plate 702 and the second support plate 705 and the plane of the base 1 detected by the angle sensor; m l is the total mass of the first support plate 702 and the second support plate 705; l is the length of the first support plate 702 and the second support plate 705, cos is the cosine function; L is the sliding distance value of the first sliding seat 704 detected by the distance sensor; N Ex is the Euler critical force of the lifting mechanism in the 7x axis direction, E is the elastic modulus of the support plate, λ h is the equivalent slenderness ratio, S is the sum of the cross-sectional areas of the support plates in the lifting mechanism 7;

[0070] The calculation module 2 is calculated based on the following formula 2:

[0071] Where: K is the load strength abnormality evaluation value of the lifting mechanism 7, [σ] is the theoretical stress strength value of the first support plate 702 and the second support plate 705 300MPa, C 1x , C 1y N is the reduction coefficient of the bending moment at the end of the lifting platform 211, which is 1; Eyis the Euler critical force of the lifting mechanism 7y-axis direction, N Ey =1.5N Ex ;M 1x 、M 1y W is the bending moment at the connection between the upper end of the lifting platform 211 and the support plate; 1x is the bending modulus of the support plate in the x direction, W 1y C is the bending modulus of the lifting mechanism 7 in the y direction; my is the bending moment stability coefficient, which is equal to 1, γ is the stability coefficient of the lifting platform 211 when it is under pressure, ψ is the correction coefficient, which is equal to 1, and sin is the sine function.

[0072] The working principle and beneficial effects of the above technical solution are as follows: the working angle between the first support plate 702, the second support plate 705 and the plane of the base 1 is detected by an angle sensor; the load pressure value in the vertical direction when the surface of the lifting platform 211 is working is detected by a pressure sensor; a distance sensor is used to detect the sliding distance value of the first sliding seat 704 on the first slide rail 703; a coordinate system is established by establishing a coordinate module, and the positive direction of the x-axis is defined from left to right, and the positive direction of the y-axis is defined from bottom to top; a calculation module one is used to calculate the actual supporting force of the threaded rod 10 and the Euler critical force in the x-axis direction of the lifting mechanism 7 based on the angle value of the angle sensor and the load pressure value of the pressure sensor; and then a calculation module two is used to calculate the positive direction of the x-axis of the lifting mechanism 7 The abnormal load strength evaluation value of the lifting mechanism 7 is calculated based on the result of the calculation module 1; then, through the comparison processing module, the result obtained by the calculation module 2 is compared with the real-time flow rate of the cooling water; through the alarm module, an alarm response is made in abnormal situations; when the control judgment module determines that the abnormal load strength evaluation value of the lifting mechanism 7 is greater than 0, the device works normally, and when the abnormal load strength evaluation value of the lifting mechanism 7 is less than or equal to 0, the control alarm module sounds an alarm to promptly remind the staff that the surface load of the lifting platform 211 is overloaded, and the weight is reduced in time, which ensures the health and safety of the operator at work, avoids safety accidents caused by the lifting platform 211 being overloaded and unable to bear the weight, and also improves the service life of the equipment.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lifting platform for maintenance of boiler equipment in a power plant, characterized in that: include: A base (1), a protective mechanism (2) is fixedly provided on the surface of the base (1), the protective mechanism (2) comprises a support frame (201) and a mounting frame (202), a first support rod (203) and a second support rod (204) are provided on the surface of the mounting frame (202), a sliding block (205) is slidably connected to the surface of the first support rod (203) and the second support rod (204), a first spring (206) is provided between the sliding block (205) and the mounting frame (202), and a plurality of connecting sleeves are slidably provided on the surface of the second support rod (204). A ring (207), one of the connecting rings (207) is fixedly connected to the sliding block (205), the top of the connecting ring (207) is fixedly connected to the protective net (208), the upper surface of the sliding block (205) is provided with a first connecting rope (209), the surface of the base (1) is provided with a limit frame (210), the surface of the limit frame (210) is slidably connected to a lifting platform (211), the other end of the first connecting rope (209) is fixedly connected to the lifting platform (211), and the lower surface of the lifting platform (211) is provided with a lifting mechanism (7).

2. A power plant boiler equipment maintenance lifting platform according to claim 1, characterized in that: include: The bottom end of the base (1) is respectively fixedly mounted with a support frame (201) and a mounting frame (202); the first spring (206) is sleeved on the surface of the first support rod (203); the other ends of the first support rod (203) and the second support rod (204) are fixedly connected to the support frame (201); the first support rod (203) limits the first spring (206); and the first support rod (203) and the second support rod (204) are mounted on the support frame (201).

3. A power plant boiler equipment maintenance lifting platform according to claim 2, characterized in that: include: The surface of the mounting frame (202) is rotatably connected to a rotating rod (3) via a damping bearing, and winding wheels (4) are provided at both ends of the rotating rod (3). A second connecting rope (5) is wound around the surface of the winding wheel (4), and the other end of the second connecting rope (5) is fixedly connected to a sliding block (205). The winding wheel (4) is used to wind up the second connecting rope (5), and the winding wheel (4) is provided with a damping bearing.

4. A power plant boiler equipment maintenance lifting platform according to claim 3, characterized in that: include: A plurality of guide rollers (6) are provided on the surfaces of the base (1) and the lifting platform (211), and the first connecting rope (209) is slidably connected to the guide rollers (6).

5. The power plant boiler equipment maintenance lifting platform according to claim 1 is characterized in that: The lifting mechanism (7) comprises: a first fixed seat (701), the left side of the top of the base (1) is fixedly connected to the first fixed seat (701), the center of the first fixed seat (701) is rotatably connected to a first support plate (702) via a rotating shaft, a pair of first slide rails (703) along the left and right directions are fixedly arranged on the top of the base (1), a first sliding seat (704) is slidably connected to the first slide rails (703) left and right, the center of the first sliding seat (704) is rotatably connected to a second support plate (705) via a bearing, a pair of second slide rails (706) along the left and right directions are fixedly arranged on the bottom end of the lifting platform (211), a second fixed seat (707) is fixedly arranged on the left side of the bottom end of the lifting platform (211), and the second slide rail (706) is slidably connected to the second slide seat (708) left and right.

6. A power plant boiler equipment maintenance lifting platform according to claim 5, characterized in that: include: The first support plate (702) is rotatably connected to the second sliding seat (708) via a rotating shaft, and the second support plate (705) is rotatably connected to the second fixed seat (707) via a rotating shaft. The center of the first support plate (702) is rotatably connected to a connecting rod (8) via a bearing. The connecting rod (8) is used to connect the first support plate (702) and the second support plate (705). The front and rear ends of the connecting rod (8) are rotatably connected to the second support plate (705) via bearings. The top of the base (1) is fixedly connected to a positioning seat (9), and the surface of the positioning seat (9) is rotatably connected to a threaded rod (10) via a bearing. The threaded rod (10) is threadedly connected to a threaded seat (11), and the threaded seat (11) is fixedly connected to the first sliding seat (704).

7. A lifting platform for maintenance of boiler equipment in a power plant according to claim 6, characterized in that: include: A motor (12) is fixedly mounted on the left top end of the base (1), and the output end of the motor (12) is fixedly connected to the threaded rod (10); the center of the rotating rod (3) is fixedly connected to the first gear (13); the center of the bottom of the base (1) is fixedly connected to a mounting seat (14); the center of the mounting seat (14) is rotatably connected to a positioning rod (15) via a bearing; the rear end of the positioning rod (15) is fixedly connected to a second gear (16), and the second gear (16) is meshingly connected to the first gear (13); the front end of the connecting rod (8) is fixedly connected to a rotating handle (17), and the diameter of the second gear (16) is larger than the diameter of the first gear (13).

8. The power plant boiler equipment maintenance lifting platform according to claim 2 is characterized in that: include: The lower surface of the base (1) is provided with a positioning block (18), the surface of the positioning block (18) is provided with a second spring (19), the other end of the second spring (19) is provided with a trapezoidal block (20), and the upper surface of the sliding block (205) is provided with a slot for clamping the trapezoidal block (20), and the arranged trapezoidal block (20) can be clamped in the slot of the sliding block (205).

9. The power plant boiler equipment maintenance lifting platform according to claim 5, characterized in that: Also includes: An angle sensor, used to detect a working angle between the first support plate (702) and the second support plate (705) and the plane of the base (1); A pressure sensor, used to detect the load pressure value in the vertical direction when the lifting platform (211) is working; A distance sensor, used for detecting a sliding distance value of the first sliding seat (704) on the first sliding rail (703); An alarm module for responding to alarms in abnormal situations; Create a coordinate module to establish a coordinate system, define the positive direction of the x-axis from left to right and the positive direction of the y-axis from bottom to top; A calculation module 1 is used to calculate the actual support force of the threaded rod (10) on the lifting platform (211) and the Euler critical force of the lifting mechanism (7) in the x-axis direction based on the angle value of the angle sensor and the load pressure value of the pressure sensor; A calculation module 2, used for calculating an abnormal load strength evaluation value of the lifting mechanism (7) based on the calculation module 1; A comparison processing module is used to compare the result obtained by the calculation module 2 with the real-time flow rate of the cooling water; The control judgment module is configured to control the device to work normally when the abnormal load strength evaluation value of the lifting mechanism (7) is greater than 0, and to control the alarm module to sound an alarm when the abnormal load strength evaluation value of the lifting mechanism (7) is less than or equal to 0.

10. A lifting platform for overhauling boiler equipment in a power plant according to claim 9, characterized in that: include: The calculation module 1 calculates based on the following formula 1: Wherein: F is the actual supporting force of the threaded rod (10) on the lifting platform (211) during operation; N is the vertical load pressure on the surface of the lifting platform (211) detected by the pressure sensor; m1 is the mass of the lifting platform (211); g is the acceleration of gravity, which is 9.81; α is the working angle between the first support plate (702) and the second support plate (705) and the plane of the base (1) detected by the angle sensor; m l is the total mass of the first support rod (203) and the second support rod (204); l is the length of the first support plate (702) and the second support plate (705); cos is the cosine function; L is the sliding distance value of the first sliding seat (704) detected by the distance sensor; N Ex is the Euler critical force in the x-axis direction of the lifting mechanism (7), E is the elastic modulus of the support plate, λ h is the equivalent slenderness ratio, S is the total cross-sectional area of ​​the support plates in the lifting mechanism (7); The calculation module 2 is calculated based on the following formula 2: Where: K is the load strength abnormality evaluation value of the lifting mechanism (7), [σ] is the theoretical stress strength value of the first support plate (702) and the second support plate (705) 300MPa, C 1x , C 1y N is the reduction factor of the bending moment at the end of the lifting platform (211), which is 1; Ey is the Euler critical force in the y-axis direction of the lifting mechanism (7), N Ey =1.5N Ex ;M 1x 、M 1y W is the bending moment at the connection between the upper end of the lifting platform (211) and the support plate; 1x is the bending modulus of the support plate in the x direction, W 1y C is the bending modulus of the lifting mechanism (7) in the y direction; my is the moment stability coefficient, which is equal to 1, γ is the stability coefficient of the lifting platform (211) when it is under pressure, ψ is the correction coefficient, which is equal to 1, and sin is the sine function.

Images