Auxiliary device for overhauling tail flue of power station boiler

Abstract

The embodiment of the invention provides an auxiliary device for overhauling a tail flue of a power station boiler. The auxiliary device comprises a bottom plate, a driving mechanism, a lifting mechanism and a working platform. The bottom plate is used for being placed at a preset maintenance position of a tail flue; the working platform is used for bearing maintainers; the lifting mechanism is connected between the bottom plate and the working platform; the driving mechanism provides a power source for the lifting mechanism, and the lifting mechanism can enable the working platform to ascend and descend so as to adjust the height of the working platform. The auxiliary device solves the problem of inconvenience in inspection and subsequent maintenance of a tail flue of a high-capacity unit at present, the height and the position of the working platform can be flexibly adjusted according to different working requirements, the working platform can be lowered to the lowest height in a non-working state so that the working platform and the bottom plate can be compressed together, and the auxiliary device is convenient to carry. And meanwhile, the device also has the characteristics of being light, easy to carry, small in size and flexible, can effectively reach the detection position, expands the detection range, and is convenient for subsequent maintenance and replacement.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of auxiliary equipment for boiler maintenance, and particularly relate to an auxiliary device for overhauling the tail flue of a power station boiler. Background Art

[0002] In the context of energy transformation, although new energy has received sufficient attention and development, in the short and medium terms, thermal power generation still accounts for the main part of the power generation proportion. With the breakthrough of thermal power unit construction technology and the limitation of land resources, most power plants tend to choose to build higher-capacity generating units, such as 660MW and 1000MW generating units. Under higher-capacity units, as the key channel for flue gas transportation, the tail flue serves under harsh working conditions such as high temperature, high humidity, corrosion, and soot blowing wear for a long time. At the same time, compared with lower-capacity units, the temperature and flow rate of the flue gas will increase, resulting in more prone to various defects such as wear and blow damage in the tail flue tubes. If the defective pipe sections are not discovered and processed in time, serious accidents such as leakage and pipe explosion may occur, endangering the safety of personnel and equipment and causing economic losses.

[0003] In the context of frequent peak shaving, defects are more likely to occur in various components of the power plant, which requires expanding the detection scope in the anti-wear and explosion-proof inspection. The tail flue tubes can be arranged in multiple layers in parallel in the height direction. For some million-kilowatt units, there are more than 10 layers. Taking the third layer upward as an example, its distance from the height where a person stands is about 2.0m. As the inspection continues to expand upward, the distance will continue to increase. Although in a relatively high space, the working environment of construction workers has been improved to a certain extent, it also causes troubles for the inspection and subsequent maintenance and replacement of the tail flue.

[0004] Generally, the method to solve this problem is to set up a scaffold board or find auxiliary items to pad the feet. Since the boiler tail flue is composed of multiple screens of tubes arranged, there are gaps between the tube screens and it is not a completely flat surface. In practical applications, it is found that using auxiliary items to pad the feet has safety and technical problems such as unstable support, non-adjustable height, and difficulty in obtaining. Although the scaffold board is stable, it is made by tying iron plates and tubes. On the one hand, it requires professional scaffolders to operate. On the other hand, it is relatively heavy and difficult to move. It is blocked when entering the manhole door, and there is also the problem of non-adjustable height. Currently, less attention has been paid to such problems, and there is no reliable, stable, portable, and flexible auxiliary device specifically for inspecting the boiler tail flue on the market.

[0005] In view of the above problems, it is necessary to propose an auxiliary device for overhauling the tail flue of a power station boiler with reasonable design and effective solution to the above problems. Summary of the Invention

[0006] The embodiments of the present disclosure aim to at least solve one of the technical problems existing in the prior art, and provide an auxiliary device for overhauling the tail flue of a power station boiler.

[0007] An embodiment of the present disclosure provides an auxiliary device for overhauling the tail flue of a power station boiler, which includes a bottom plate, a driving mechanism, a lifting mechanism, and a working platform;

[0008] The bottom plate is used to be placed at a preset overhaul position of the tail flue;

[0009] The working platform is used to carry overhaul personnel;

[0010] The lifting mechanism is connected between the bottom plate and the working platform;

[0011] The driving mechanism provides a power source for the lifting mechanism, and the lifting mechanism can lift the working platform to adjust the height of the working platform.

[0012] Optionally, the lifting structure includes a first lifting strut and a second lifting strut, and the first lifting strut and the second lifting strut are cross-actively connected;

[0013] The first end of the first lifting strut is fixedly connected to the working platform, and the second end of the first lifting strut is slidably connected to the bottom plate;

[0014] The first end of the second lifting strut is fixedly connected to the bottom plate, and the second end of the second lifting strut is slidably connected to the working platform.

[0015] Optionally, the maximum sliding displacement of the second end of the first lifting strut and the second end of the second lifting strut does not exceed half of the length of the working platform.

[0016] Optionally, a first limiting groove is provided on the top wall of the bottom plate at the position corresponding to the second end of the first lifting strut;

[0017] A first roller is provided at the second end of the first lifting strut;

[0018] The first roller is rotatably arranged in the first limiting groove, and the first limiting groove can limit the first roller to reciprocally roll only in a first direction.

[0019] Optionally, a second limiting groove is provided on the bottom wall of the working platform at the position corresponding to the second end of the second lifting strut;

[0020] A second roller is provided at the second end of the second lifting strut;

[0021] The second roller is rotatably arranged in the second limiting groove, and the second limiting groove can limit the second roller to reciprocally roll only in a first direction.

[0022] Optionally, the driving mechanism includes a hand-operated turntable and a lead screw;

[0023] The hand-cranked turntable is disposed at the first end of the lead screw, and the second end of the lead screw is fixedly connected to the second end of the second lifting strut.

[0024] Optionally, the base plate includes a first sub-base plate and a second sub-base plate, and the first sub-base plate and the second sub-base plate are connected by a support beam.

[0025] Optionally, the length of the working platform is the same as the length of the base plate.

[0026] Optionally, the length range of the working platform is 100 cm to 120 cm, the width range of the working platform is 50 cm to 60 cm, and the thickness range of the working platform is 8 cm to 10 cm;

[0027] The maximum rising height range of the working platform is 70 cm to 80 cm.

[0028] Optionally, the base plate, the driving mechanism, the lifting mechanism, and the working platform are all made of nylon material.

[0029] In the maintenance auxiliary device for the tail flue of a power station boiler according to the embodiment of the present disclosure, the lifting mechanism is connected between the base plate and the working platform, and the lifting mechanism can lift the working platform to adjust the height of the working platform, solving the inconvenience encountered in the inspection and subsequent maintenance of the tail flue of large-capacity units. In the face of different work requirements, the height and position of the working platform can be flexibly adjusted, and in the non-working state, the working platform can be lowered to the lowest height so that it is compressed together with the base plate, which is convenient to carry. At the same time, the device also has the characteristics of being light, easy to carry, small in size, and flexible, and can effectively reach the detection position, expand the detection range, and facilitate subsequent maintenance and replacement. Brief Description of the Drawings

[0030] Figure 1 It is the front view of a maintenance auxiliary device for the tail flue of a power station boiler according to an embodiment in the embodiment of the present disclosure;

[0031] Figure 2 It is the side view of a maintenance auxiliary device for the tail flue of a power station boiler according to an embodiment in the embodiment of the present disclosure;

[0032] Figure 3 It is the working schematic diagram of the maintenance auxiliary device for the tail flue of a power station boiler according to an embodiment in the embodiment of the present disclosure. Detailed Description of the Embodiment

[0033] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the following further describes the embodiments of the present disclosure in detail in conjunction with the drawings and specific embodiments.

[0034] At present, in the inspection and maintenance of the tail flue of large-capacity units, existing devices have problems such as being bulky and not easy to carry, requiring specialized technicians to set up scaffolding boards, having non-adjustable working heights, and posing safety hazards.

[0035] In view of the problems existing in the prior art, such as Figures 1 to 3 As shown, an auxiliary device 100 for overhauling the tail flue of a power station boiler is provided in an embodiment of the present disclosure, especially for the tail flue of a power station boiler of a large-capacity unit. The auxiliary device 100 for overhauling the tail flue of a power station boiler includes a bottom plate 110, a driving mechanism 120, a working platform 130, and a lifting mechanism 140.

[0036] The bottom plate 110 is used to be placed at a preset overhaul position of the tail flue.

[0037] The working platform 130 is used to carry maintenance personnel.

[0038] The lifting mechanism 140 is connected between the bottom plate 110 and the working platform 130.

[0039] The driving mechanism 120 provides a power source for the lifting mechanism 140, and the lifting mechanism 140 can lift the working platform 130 to adjust the height of the working platform 130.

[0040] Before overhauling the tail flue of a power station boiler, the working platform 130 is lowered to the lowest height through the lifting mechanism 140 so that it is compressed together with the bottom plate 110, with a small volume and convenient for placement at the preset overhaul position of the tail flue. When it is necessary to overhaul the tail flue of a power station boiler, the auxiliary device 100 for overhauling the tail flue of a power station boiler is placed at the preset overhaul position of the tail flue, and the working platform is adjusted to the preset height through the lifting mechanism 140, and maintenance personnel stand on the working platform 130 to carry out the overhaul work of the tail flue.

[0041] For the auxiliary device for overhauling the tail flue of a power station boiler in an embodiment of the present disclosure, the lifting mechanism is connected between the bottom plate and the working platform, and the lifting mechanism can lift the working platform to adjust the height of the working platform, solving the inconveniences encountered in the current inspection and subsequent maintenance of the tail flue of large-capacity units. Facing different working needs, the height and position of the working platform can be flexibly adjusted, and in the non-working state, the working platform can be lowered to the lowest height so that it is compressed together with the bottom plate, which is convenient to carry. At the same time, the device also has the characteristics of being light, easy to carry, small in volume, and flexible, and can effectively reach the detection position, expand the detection range, and facilitate subsequent maintenance and replacement.

[0042] Exemplarily, such as Figure 1As shown, the lifting structure includes a first lifting strut 141 and a second lifting strut 142, and the first lifting strut 141 and the second lifting strut 142 are cross-actively connected. Specifically, in this embodiment, the first lifting strut 141 and the second lifting strut 142 are hinged.

[0043] The first end of the first lifting strut 141 is fixedly connected to the working platform 130, and the second end of the first lifting strut 141 is slidably connected to the bottom plate 110. Specifically, in this embodiment, the first end of the first lifting strut 141 is fixedly connected to the working platform 130 through a fixing block A.

[0044] The first end of the second lifting strut 142 is fixedly connected to the bottom plate 110, and the second end of the second lifting strut 142 is slidably connected to the working platform 130. Specifically, in this embodiment, the first end of the second lifting strut 142 is fixedly connected to the bottom plate 110 through a fixing block B.

[0045] In this embodiment, the first lifting strut 141 and the second lifting strut 142 together form a scissor-shaped support frame, and the height of the working platform 130 is adjusted by operating the scissor-shaped support frame, which is simple and convenient to operate.

[0046] Exemplarily, the maximum sliding displacement of the second end of the first lifting strut 141 and the second end of the second lifting strut 142 cannot exceed half of the length of the working platform 130. This can ensure the stability of the auxiliary device 100 for overhauling the tail flue of the power station boiler.

[0047] Exemplarily, as Figure 1 shown, a first limiting groove 111 is provided on the top wall of the bottom plate 110 corresponding to the second end of the first lifting strut 141.

[0048] A first roller 151 is provided at the second end of the first lifting strut 141.

[0049] The first roller 151 is rotatably arranged in the first limiting groove 111, and the first limiting groove 111 can limit the first roller 151 to reciprocally roll only along the first direction. Among them, the length of the first limiting groove 111 cannot exceed half of the length of the working platform 130.

[0050] Exemplarily, as Figure 1 shown, a second limiting groove 131 is provided on the bottom wall of the working platform 130 corresponding to the second end of the second lifting strut 142.

[0051] A second roller 152 is provided at the second end of the second lifting strut 142.

[0052] The second roller 152 is rotatably arranged in the second limiting groove 131, and the second limiting groove 131 can limit the second roller 152 to reciprocally roll only in the first direction. Among them, the length of the second limiting groove 131 shall not exceed half of the length of the working platform 130.

[0053] Among them, the first roller 151 and the second roller 152 roll simultaneously and in the same direction.

[0054] Specifically, as Figure 1 and Figure 3 shown, when the first roller 151 and the second roller 152 move leftward along the first limiting groove 111 and the second limiting groove 131 respectively, the working platform 130 is driven to rise; when the first roller 151 and the second roller 152 move rightward along the first limiting groove 111 and the second limiting groove 131 respectively, the working platform 130 is driven to descend.

[0055] Exemplarily, as Figure 1 shown, the driving mechanism 120 includes a hand-cranked turntable 121 and a lead screw 122. The hand-cranked turntable 121 is arranged at the first end of the lead screw 122, and the second end of the lead screw 122 is fixedly connected to the second end of the second lifting strut 142.

[0056] Specifically, by rotating the hand-cranked turntable 121, the lead screw 122 can be extended or retracted, thereby controlling the movement of the second end of the second lifting strut 142 in the second limiting groove 131. Since the second lifting strut 142 is movably connected to the first lifting strut 141, the second end of the first lifting strut 141 is simultaneously driven to move in the first limiting groove 111, thereby driving the lifting of the working platform 130.

[0057] In this embodiment, the driving mechanism 120 includes a hand-cranked turntable 121 and a lead screw 122 to drive the first lifting strut 141 and the second lifting strut 142, and the lifting of the working platform 130 is realized by manual operation, with a simple structure and convenient operation.

[0058] Exemplarily, as Figure 2 shown, the bottom plate 110 includes a first sub-bottom plate 112 and a second sub-bottom plate 113, and the first sub-bottom plate 112 and the second sub-bottom plate 113 are connected by a support beam 114. The support beam 114 can increase the stability of the bottom plate 110. That is to say, the bottom plate 110 can be a complete plate or composed of two slender plates.

[0059] In this embodiment, the bottom plate 110 includes a first sub-bottom plate 112 and a second sub-bottom plate 113, and the first sub-bottom plate 112 and the second sub-bottom plate 113 are connected by a support beam 114, further reducing the weight of the entire device, improving the portability, and also ensuring the stability of the entire device, improving the safety during work.

[0060] Exemplarily, in order to further increase the stability of the entire device, the length of the working platform 130 is set to be the same as the length of the bottom plate 110.

[0061] Exemplarily, the length range of the working platform 130 is 100 cm to 120 cm, the width range of the working platform 130 is 50 cm to 60 cm, the thickness range of the working platform 130 is 8 cm to 10 cm. The maximum rising height range of the working platform 130 is 70 cm to 80 cm.

[0062] Specifically, in this embodiment, in combination with the working environment of the tail flue of the power station, the dimensions of the working platform 130 can be set as follows: the length of the working platform 130 is 100 cm, the width of the working platform 130 is 50 cm, and the thickness of the working platform 130 is 8 cm. The length range of the first limiting groove 111 and the second limiting groove 131 can be set to 0 cm to 40 cm. Under this condition, the maximum rising height of the working platform 130 is 70 cm.

[0063] In this embodiment, with the working platform 130 set with the above dimensions, on the premise of being able to carry maintenance personnel, the stability of the entire device can also be ensured.

[0064] It should be noted that there is no specific limitation on the dimensions of the working platform 130. If there are special needs, the dimensions of the working platform 130 can be changed proportionally. It should be further noted that when the length of the working platform 130 is relatively long and exceeds 150 cm, it is recommended to increase the thickness of the working platform as needed to ensure the bearing capacity.

[0065] Exemplarily, in this embodiment, the bottom plate 110, the driving mechanism 120, the working platform 130, and the lifting mechanism 140 are all made of nylon material. That is to say, the whole of the maintenance auxiliary device 100 for the tail flue of the power station boiler is made of nylon material.

[0066] In this embodiment, making the device with nylon material has the characteristic of being lightweight while ensuring the use strength compared with the steel grating.

[0067] As Figures 1 to 3 shown, the on-site implementation process of the maintenance auxiliary device 100 for the tail flue of the power station boiler according to the embodiment of the present disclosure is as follows:

[0068] The maintenance personnel bring the auxiliary device with the working platform 130 lowered to the lowest height into the workplace.

[0069] After the staff reach the designated preset maintenance position, the bottom plate 110 of the auxiliary device is stably placed at the preset maintenance position.

[0070] Further, visually determine the required working height, such as Figure 3 As shown, by rotating the hand-cranked turntable 121 clockwise, the lead screw 122 is driven to move horizontally. Since the lead screw 122 is fixedly connected to the second end of the second lifting strut 142, the second end of the second lifting strut 142 is rotatably connected to the working platform 130, and the first end of the second lifting strut 142 is fixedly connected to the bottom plate 110. At the same time, since the second lifting strut 141 is movably connected to the first lifting strut 141, the first end of the first lifting strut 141 is fixedly connected to the working platform 130, and the second end of the first lifting strut 141 is rotatably connected to the bottom plate 110. By retracting the lead screw 122, the first roller 151 and the second roller 152 are driven to roll to the left. Since the lengths of the first lifting strut 141 and the second lifting strut 142 remain unchanged, the angles between them and the bottom plate 110 continuously increase under the drive of the lead screw 122, driving the working platform 130 to rise to the preset height.

[0071] When the working platform 130 rises to the preset height, the staff stands on the working platform 130 for inspection or construction operations.

[0072] After the maintenance work is completed, the staff leaves the working platform 130.

[0073] By rotating the hand-cranked turntable 121 counterclockwise, the working platform 130 is lowered to the lowest height for easy carrying and leaving the site. Thus, a flexible and safe maintenance work process can be achieved.

[0074] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the embodiments of the present disclosure. However, the embodiments of the present disclosure are not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the embodiments of the present disclosure.

Claims

1. A power station boiler tail flue maintenance auxiliary device, characterized in that: It includes a base plate, a driving mechanism, a lifting mechanism and a working platform; The bottom plate is used to be placed at a preset maintenance position of the tail flue; The working platform is used to carry maintenance personnel; The lifting mechanism is connected between the base plate and the working platform; The driving mechanism provides a power source for the lifting mechanism, and the lifting mechanism can lift and lower the working platform to adjust the height of the working platform.

2. The device according to claim 1, characterized in that The lifting structure comprises a first lifting support rod and a second lifting support rod, wherein the first lifting support rod and the second lifting support rod are cross-movably connected; The first end of the first lifting support rod is fixedly connected to the working platform, and the second end of the first lifting support rod is slidably connected to the bottom plate; The first end of the second lifting support rod is fixedly connected to the bottom plate, and the second end of the second lifting support rod is slidably connected to the working platform.

3. The device according to claim 2, characterized in that The maximum sliding displacement of the second end of the first lifting support rod and the second end of the second lifting support rod cannot exceed half of the length of the working platform.

4. The device according to claim 2, characterized in that The top wall of the bottom plate is provided with a first limiting groove at the second end corresponding to the first lifting support rod; A first roller is disposed at the second end of the first lifting support rod; The first roller is rotatably disposed in the first limiting groove, and the first limiting groove can limit the first roller to reciprocate and roll only along a first direction.

5. The device according to claim 4, characterized in that The bottom wall of the working platform is provided with a second limiting groove at the second end corresponding to the second lifting support rod; A second roller is disposed at the second end of the second lifting support rod; The second roller is rotatably disposed in the second limiting groove, and the second limiting groove can limit the second roller to reciprocate and roll only along the first direction.

6. The device according to any one of claims 2 to 5, characterized in that The driving mechanism includes a hand-cranked turntable and a lead screw; The hand-cranked turntable is arranged at the first end of the lead screw, and the second end of the lead screw is fixedly connected to the second end of the second lifting support rod.

7. The device according to any one of claims 1 to 5, characterized in that The base plate includes a first sub-base plate and a second sub-base plate, and the first sub-base plate and the second sub-base plate are connected by a support beam.

8. The device according to any one of claims 1 to 5, characterized in that The length of the working platform is consistent with the length of the base plate.

9. The device according to any one of claims 1 to 5, characterized in that: The length of the working platform ranges from 100 cm to 120 cm, the width of the working platform ranges from 50 cm to 60 cm, and the thickness of the working platform ranges from 8 cm to 10 cm; The maximum rising height of the working platform is in the range of 70 cm to 80 cm.

10. The device according to any one of claims 1 to 5, characterized in that The bottom plate, the driving mechanism, the lifting mechanism and the working platform are all made of nylon material.

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