CN209890199U - Movable type square-shaped maintenance platform for heating screen in circulating fluidized bed boiler hearth - Google Patents
Movable type square-shaped maintenance platform for heating screen in circulating fluidized bed boiler hearth Download PDFInfo
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- CN209890199U CN209890199U CN201920119426.7U CN201920119426U CN209890199U CN 209890199 U CN209890199 U CN 209890199U CN 201920119426 U CN201920119426 U CN 201920119426U CN 209890199 U CN209890199 U CN 209890199U
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Abstract
The scheme relates to a movable type square-shaped maintenance platform for a heating screen in a hearth of a circulating fluidized bed boiler, which comprises a base, an air bag group and a square-shaped workbench, wherein the base, the air bag group and the square-shaped workbench are sequentially arranged from bottom to top; the base comprises supporting legs and a supporting platform which is arranged and fixed on the upper parts of the supporting legs; the air bag group is in a shape of a Chinese character 'hui', the air bag group in the shape of a Chinese character 'hui' is formed by butt joint of two U-shaped air bags, and the end parts of the two U-shaped air bags are detachably connected through two rigid connecting pipes; the utility model has convenient construction and disassembly, short time, low cost, safety and reliability, and greatly reduces the maintenance cost of the heated screen in the hearth of the circulating fluidized bed boiler; the base is movable, can accomplish the maintenance to all heated screens once putting up to there is better adaptability to the heated screen that has the deformation.
Description
Technical Field
The utility model belongs to the technical field of the boiler overhauls, concretely relates to portable shape maintenance platform that returns that is used for the interior heated screen of circulating fluidized bed boiler furnace.
Background
At present, boiler furnace maintenance platforms are adopted for the maintenance of most of boiler furnaces of thermal power plants in China. The conventional maintenance platform is built layer by adopting scaffold steel pipes, then bamboo raft or fixed grid plates are laid on the conventional maintenance platform to form an operation plane, and an operator moves back and forth between different operation planes to maintain the conventional maintenance platform. The boiler furnace overhaul platform has the characteristics of convenience in use, high safety and the like.
Coal-fired boilers are classified according to their types, and can be classified into pi-type coal-fired boilers, tower-type boilers, W-flame boilers, and circulating fluidized bed boilers. As the insides of the Pi-shaped coal-fired boiler, the tower furnace and the W flame furnace are all hollow structures, the maintenance platform is convenient to build.
The maintenance working surface built by the scaffold outside the boiler is very simple, and if the boiler furnace is required to be maintained, the maintenance is very troublesome by building the scaffold, as people or objects are transferred in and out of the boiler through the manhole with the diameter of about 450MM, a plurality of tons or even tens of tons of scaffold steel pipes are conveyed into the boiler, and then the steel pipes are built and connected one by one to build a suspended working surface with the height of a plurality of meters or even tens of meters, narrow and small closed in the boiler, illumination is not good and have under the environment of more outstanding sharp portion, this kind of work of setting up is time-consuming, hard and dangerous work, and a little carelessly, the scaffold steel pipe falls or touches water-cooling wall or other devices in the boiler, all will probably cause the boiler in the device damage or the just wear-resisting anticorrosive protective layer damage of water-cooling wall face, operating personnel if fall carelessly, probably cause serious injury.
Under the environment of the boiler internal overhaul, a scaffold overhaul platform with a cubic size of about 600 is generally built for 2 days, and the time for dismantling is at least one day, and the boiler can cause great economic loss to manufacturers every time the boiler is shut down for one day; and, the price of asking the engineering team to build the scaffold steel pipe is also not trivial.
After the scaffold maintenance platform is built, an operator moves back and forth on different operation levels to carry out maintenance operation, which is dangerous and inconvenient, and due to the shielding of the scaffold steel pipe, the operations of spraying a wear-resistant layer, repairing and welding defects and the like of the maintainer can be influenced; because gaps and unevenness exist among the bamboo raft or the grid plates laid on the working surface, when the working surface moves large or heavy equipment, the bamboo raft or the grid plates do not move smoothly on the working surface or are easy to be blocked, and operators can be tripped when moving the bamboo raft or the grid plates on the working surface.
In addition, compared with other types of boilers, the circulating fluidized bed boiler often has several to tens of heated screens suspended and distributed in the hearth, occupies the interior of the boiler hearth, is difficult to reasonably build a suitable maintenance platform, and causes inconvenience in maintenance; and because the length of the heating screen is longer, and the width is comparatively single thin, after the boiler is heated and used, the boiler is easy to generate larger deformation, and various maintenance platform structures can not completely and conveniently maintain the heating screen. Therefore, the heating screen is generally inspected by sampling inspection or small scaffolds are erected for inspection, but the inspection is incomplete and defects are easy to remain through sampling inspection of the heated hanging screen in the hearth of the circulating fluidized bed boiler, and part of fixed platforms are inflexible to inspect, so that the continuous inspection is difficult after the deformed heating screen is met.
In view of the above, there is a need for a mobile rectangular maintenance platform for a heated screen in a furnace of a circulating fluidized bed boiler, which has a simple structure, a fast construction speed, and good adaptability and safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a movable type that returns shape maintenance platform that is used for the interior heated screen of circulating fluidized bed boiler furnace simple structure, builds rapidly, with low costs.
Another object of the utility model is to provide a portable shape maintenance platform that returns that is used for the interior heated screen of circulating fluidized bed boiler furnace that portable, the security is good, can independently control the lift.
In order to solve the technical problem, the utility model discloses a movable type square-wave maintenance platform for a heated screen in a circulating fluidized bed boiler furnace, which comprises a base, an air bag group and a square-wave workbench which are arranged from bottom to top in sequence;
the base comprises supporting legs and a supporting platform which is arranged and fixed on the upper parts of the supporting legs;
the air bag group is in a shape of a square circle, the air bag group in the shape of the square circle is formed by butting two U-shaped air bags, the end parts of the two U-shaped air bags are detachably connected through two rigid connecting pipes, and the U-shaped air bags are flexible hollow bodies;
the upper side and the lower side of the U-shaped air bag are respectively provided with an upper joint surface and a lower joint surface, and the upper joint surface and the lower joint surface are light semi-rigid plates capable of bearing pressure; the air bag groups are stacked up and down;
the square-shaped workbench is a square-shaped flat plate formed by splicing;
the boiler is characterized by further comprising an air pump, wherein the air pump is arranged outside the boiler and used for inflating the air bag set through a hose.
Preferably, universal wheels capable of being clamped and stopped are installed at the bottoms of the supporting legs.
Preferably, an air duct is connected between the two U-shaped air bags, and the air duct is in a spiral shape with variable length.
Preferably, an inflation nozzle and a pressure relief nozzle are arranged on the outer side of the U-shaped air bag.
Preferably, the surface of the U-shaped air bag is subjected to wear-resistant and high-temperature resistant treatment, the air pressure which can be borne by a single U-shaped air bag is not less than 0.2MPa, and the height of the single U-shaped air bag after inflation is not less than 500 mm.
Preferably, the weight of the single U-shaped air bag is less than 10kg, and the total weight of the workbench does not exceed 200 kg.
Preferably, the periphery of the workbench is provided with detachable guardrails, and magic tapes or buckles are arranged at the bottom of the workbench and the upper part of the supporting table.
Preferably, the upper and lower engaging surfaces of the U-shaped air bag are provided with hook and loop fasteners for connecting and fixing adjacent air bag units to each other, thereby forming a three-dimensional structure with a certain supporting strength.
Preferably, a plurality of telescopic loop bars which are uniformly distributed are arranged on the supporting table, and the telescopic loop bars are sequentially sleeved by a plurality of metal pipes with gradually reduced inner diameters; flexible loop bar one end is fixed with the perpendicular installation of a supporting bench, and the other end passes the shape middle part of returning of gasbag group and is fixed with the shape middle part lateral wall installation of returning of workstation: the length of the telescopic sleeve rod is changed along with the lifting of the workbench.
The utility model discloses a portable shape maintenance platform that returns that is used for in circulating fluidized bed boiler furnace to receive heat screen has following advantage at least:
1. through the telescopic sleeve rods which are spliced, a three-dimensional structure which has certain supporting strength and can change the height along with the number of the inflatable air bag groups is formed, and the supporting workbench reaches a required working layer without the need of making operators strenuously move up and down or move the maintenance device.
2. The building of the base and the workbench and the inflation of the air bag group can be rapidly completed, and the building time of the movable type square-shaped maintenance platform for the heating screen in the hearth of the circulating fluidized bed boiler is greatly shortened.
3. The U-shaped air bag in the pressure relief state can be folded into a smaller volume, so that the air bag can conveniently enter and exit from a narrow manhole.
4. The air bag groups are independently inflated, so that even if individual air bag groups are damaged and leaked during maintenance operation, the height of the workbench only slowly decreases in a small range, the workbench does not rapidly and greatly decrease or seriously incline, and the safety of operators is well ensured; the air bag group in the shape of a Chinese character 'hui' is formed by butt joint of two U-shaped air bags and is detachably connected through the connecting pipe, so that the air bag group in the shape of a Chinese character 'hui' is variable in the length direction, and has better adaptability.
5. The construction cost is low, and the maintenance cost of the heating screen in the hearth of the circulating fluidized bed boiler is greatly reduced.
6. The workbench is free of shielding, smooth maintenance of a boiler furnace is facilitated, the heating screen can penetrate through the middle of the workbench through the clip-shaped air bag and the clip-shaped maintenance platform, operation personnel can maintain at 360 degrees without dead angles, and maintenance is greatly facilitated.
7. Through the telescopic loop bar and the reasonable setting of the air pressure in the air bag, the stability of the workbench is ensured, and the smooth overhaul of the boiler furnace is facilitated.
8. The base is movable, and the maintenance of all heated screens can be accomplished to once building.
9. The square-shaped maintenance platform has better adaptability to the deformed heated screen.
Drawings
FIG. 1 is a schematic view showing a structural dispersion of a mobile rectangular maintenance platform for a heated screen in a hearth of a circulating fluidized bed boiler.
FIG. 2 is a schematic cross-sectional view of a mobile rectangular maintenance platform for a heated screen in a furnace of a circulating fluidized bed boiler (with an air bag group removed).
Fig. 3 is a schematic view of a structure of an airbag unit.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," when used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
As shown in fig. 1-3, a movable type square-wave maintenance platform for a heated screen in a hearth of a circulating fluidized bed boiler comprises a base 1, an air bag group 2 and a square-wave workbench 3 which are sequentially arranged from bottom to top;
the base 1 comprises supporting legs 101 and a supporting platform 102 which is arranged and fixed on the upper parts of the supporting legs;
the air bag group 2 is in a shape of a square circle, the air bag group 2 in the shape of the square circle is formed by butting two U-shaped air bags 201, the end parts of the two U-shaped air bags 201 are detachably connected through two rigid connecting pipes 202, and the U-shaped air bags are flexible hollow bodies;
the upper side and the lower side of the U-shaped air bag 201 are respectively provided with an upper joint surface 203 and a lower joint surface 204, and the upper joint surface and the lower joint surface are light semi-rigid plates capable of bearing pressure; the airbag group 2 is provided with a plurality of vertically stacked airbag groups; the length of the connecting pipe 202 is changed to adapt to the heated screens with different widths; by changing the stacking number of the air bag groups 2, the maximum height which can be reached by the workbench is changed so as to adapt to boilers of different models.
The square-shaped workbench 3 is a square-shaped flat plate formed by splicing; the rectangular flat plate can enable the heating screen to penetrate through the middle of the rectangular flat plate, so that workers can conveniently and comprehensively overhaul around the heating screen.
The boiler is characterized by further comprising an air pump, wherein the air pump is arranged outside the boiler and used for inflating the air bag set through a hose. The air pump is usually big and heavy, is unfavorable for the manhole, and the peripheral hardware is more reasonable.
The universal wheel 103 that can block is installed to supporting leg 101 bottom, makes things convenient for the fixed of base and removes.
An air duct 205 is connected between the two U-shaped air bags 201, and the air duct is in a spiral shape with variable length.
An inflating nozzle 206 and a pressure relief nozzle 207 are arranged on the outer side of the U-shaped air bag 201.
The surface of the U-shaped air bag 201 is subjected to wear-resistant and high-temperature resistant treatment, the air pressure borne by a single U-shaped air bag is not less than 0.2MPa, and the height of the inflated single U-shaped air bag is not less than 500 mm. Because repair welding operation may need to be carried out on facilities such as the inner wall of the boiler or a water-cooled wall during maintenance, in order to prevent welding slag from burning the air bag, wear-resistant and high-temperature-resistant treatment is carried out on the surface of the air bag, the service life of the air bag is prolonged, and if necessary, a protective cover can be added on the outer side of the whole air bag to play a role in isolation protection.
The weight of the single U-shaped air bag 201 is less than 10kg, and the total weight of the workbench does not exceed 200 kg. The worktable should be made of light material to reduce the pressure of the air bag.
The upper and lower engaging surfaces of the U-shaped airbag 201 are provided with hook and loop fasteners for connecting and fixing the adjacent airbag groups 2 to each other, thereby forming a three-dimensional structure with a certain supporting strength. The inner side edge of the clip-shaped three-dimensional structure is adapted to the inner diameter of the boiler as much as possible, so that operators can conveniently overhaul any place in a short distance.
A plurality of telescopic loop bars 104 which are uniformly distributed are arranged on the supporting table 102, and the telescopic loop bars 104 are formed by sequentially sleeving a plurality of metal pipes with gradually reduced inner diameters; telescopic sleeve 104 one end and a supporting bench 102 vertical installation are fixed, and the other end passes the shape middle part of returning of gasbag group 2 and is fixed with the shape middle part lateral wall installation of returning of workstation 3: the telescopic sleeve rod 104 changes the length thereof along with the lifting of the workbench 3. Because the air bag has certain elasticity after being inflated, when an operator moves or shakes on the workbench, the whole cylindrical air bag can slightly vibrate up and down or left and right, the slight vibration up and down does not influence normal operation, and the slight vibration left and right can cause the operator to feel uneasy.
Example 2
A use method of a movable type square-shaped maintenance platform for a heating screen in a hearth of a circulating fluidized bed boiler comprises the following steps:
s1, budget: before the construction, the number of the airbag groups 2 and the length of the connecting pipes, the sizes of the base 1 and the workbench 3 and the number of accessories are determined according to the height and the width of the heated screen in the hearth of the circulating fluidized bed boiler;
s2, base building: sending each component of a mobile type square-wave maintenance platform for a heated screen in a hearth of a circulating fluidized bed boiler into the boiler through a manhole on the boiler, and building a base under the heated screen to be detected; sharp objects such as slag and the like may exist at the bottom of the boiler, and in order to ensure the safety of the air bag and the overall convenient movement, a solid and flat movable base needs to be built to form reliable support for the air bag and the workbench.
S3, constructing an air bag group: splicing the U-shaped air bags 201 into the air bag groups 2 through the connecting pipes 202, and then sequentially connecting the upper connecting surfaces and the lower connecting surfaces on the adjacent air bag groups 2, and ensuring that the stacked air bag groups 2 are aligned up and down; the width of the middle part of the assembled air bag group in the shape of a circle is larger than that of the heated screen to be detected, so that the heated screen to be detected can smoothly pass through the middle part of the group of the air bag in the shape of a circle;
s4, building a workbench: assembling the workbench 3 according to the size of the air bag group 2, after the workbench 3 is assembled, connecting and fixing the workbench with the air bag group at the uppermost part through a magic tape or a buckle at the bottom of the workbench, installing a telescopic loop bar 104, and placing a required maintenance instrument on the workbench;
s5, inflating: starting the air pump, sequentially inflating downwards from the air bag group at the uppermost part, inflating the next air bag group after each air bag group is inflated to the rated air pressure, lifting the workbench 3 along with the inflation of the air bag group 2, and stopping the inflation when the height of the workbench reaches the required working layer; in the lifting process of the workbench, the horizontal position of the base is properly adjusted, so that the middle of the square of the workbench is opposite to the heated screen to be detected; after the inflation is stopped, the universal wheels 103 are blocked to prevent the base 1 from moving; for safety reasons, the operator should not be on the bench when initially inflating.
S6, maintenance operation: an operator enters the workbench from a ladder stand or a ladder formed along the connecting pipe to start the maintenance operation of the working layer; after the maintenance of the working layer is finished, one or a plurality of uninflated air bag groups 2 are inflated to ensure that the working platform 3 rises again, and then the maintenance is continued; this operation is repeated;
s7, mobile maintenance: after the maintenance of one heated screen is finished, sequentially releasing pressure from the bottommost airbag group 2 to reduce the height of the workbench until the workbench is completely separated from the heated screen, pushing the base to move to the position right below the other heated screen to be detected, fixing the support table, and repeating the S6 operation;
s8, disassembling: after all the heated screens are overhauled, the operator withdraws from the workbench, the air bag group 2 at the bottommost part is decompressed in sequence, and after all the decompression is finished, the air bag group is dismantled from the workbench in sequence and is sent out through a manhole for arrangement. The magic tape or the buckle ensures that the air bag groups can be conveniently connected or detached.
Example 3
For the selection of the air bag group, the outer diameter of the air bag group 2 should be adapted to the inner diameter of the boiler as much as possible when the budget is made. After the air is inflated, the distance between the outer wall of the air bag group and the inner wall of the boiler is required to be as small as possible so as to facilitate close-range maintenance.
Example 4
When a heated screen with small deformation is encountered, the air bag group with elasticity after inflation can be tightly attached to the outer wall of the heated screen, so that the deformation can be well adapted, and meanwhile, the shape of the workbench can be adaptively adjusted. In addition, when the base is detached or moved, the pressure of the air bag group is released from the upper part of the air bag group which is in contact with the heated screen, so that the damage to the air bag group caused by the friction of the heated screen is avoided.
When a heated screen with larger deformation is encountered, an air bag group with a larger square-shaped middle part is selected for maintenance and construction.
While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields suitable for the invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and embodiments shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a platform is overhauld to portable shape of returning that is used for heating screen in circulating fluidized bed boiler furnace which characterized in that: comprises a base, an air bag group and a clip-shaped workbench which are arranged from bottom to top in sequence;
the base comprises supporting legs and a supporting platform which is arranged and fixed on the upper parts of the supporting legs;
the air bag group is in a shape of a square circle, the air bag group in the shape of the square circle is formed by butting two U-shaped air bags, the end parts of the two U-shaped air bags are detachably connected through two rigid connecting pipes, and the U-shaped air bags are flexible hollow bodies;
the upper side and the lower side of the U-shaped air bag are respectively provided with an upper joint surface and a lower joint surface, and the upper joint surface and the lower joint surface are light semi-rigid plates capable of bearing pressure; the air bag groups are stacked up and down;
the square-shaped workbench is a square-shaped flat plate formed by splicing;
the boiler is characterized by further comprising an air pump, wherein the air pump is arranged outside the boiler and used for inflating the air bag set through a hose.
2. The mobile square-shaped maintenance platform for the heated screen in the hearth of the circulating fluidized bed boiler as claimed in claim 1, wherein universal wheels capable of being clamped are installed at the bottoms of the supporting legs.
3. The mobile rectangular maintenance platform for the heated screen in the furnace of the circulating fluidized bed boiler according to claim 2, wherein a gas-guide tube is connected between the two U-shaped air bags, and the gas-guide tube is a spiral shape with variable length.
4. The mobile rectangular maintenance platform for the heated screen in the furnace of the circulating fluidized bed boiler according to claim 3, wherein an inflation nozzle and a pressure relief nozzle are arranged outside the U-shaped air bag.
5. The mobile rectangular maintenance platform for the heated screen in the hearth of the circulating fluidized bed boiler according to claim 4, wherein the surfaces of the U-shaped air bags are subjected to wear-resistant and high-temperature resistant treatment, the air pressure borne by a single U-shaped air bag is not less than 0.2MPa, and the height of the inflated single U-shaped air bag is not less than 500 mm.
6. The mobile rectangular maintenance platform for a heat shield in a furnace of a circulating fluidized bed boiler according to claim 5, wherein the weight of a single U-shaped air bag is less than 10kg, and the total weight of the platform is not more than 200 kg.
7. The mobile rectangular maintenance platform for the heated screen in the circulating fluidized bed boiler furnace according to claim 6, characterized in that the periphery of the workbench is provided with detachable guardrails, and the bottom of the workbench and the upper part of the supporting platform are provided with magic tapes or buckles.
8. The mobile maintenance platform of claim 7, wherein the U-shaped air bags have hook and loop fasteners on their upper and lower engaging surfaces for connecting and fixing the adjacent air bag sets to each other to form a three-dimensional structure with a certain supporting strength.
9. The mobile rectangular maintenance platform for the heated screen in the circulating fluidized bed boiler furnace according to claim 8, wherein a plurality of uniformly distributed telescopic rods are arranged on the supporting platform, and the telescopic rods are formed by sequentially sleeving a plurality of metal pipes with gradually decreased inner diameters; flexible loop bar one end is fixed with the perpendicular installation of a supporting bench, and the other end passes the shape middle part of returning of gasbag group and is fixed with the shape middle part lateral wall installation of returning of workstation: the length of the telescopic sleeve rod is changed along with the lifting of the workbench.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920119426.7U CN209890199U (en) | 2019-01-24 | 2019-01-24 | Movable type square-shaped maintenance platform for heating screen in circulating fluidized bed boiler hearth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920119426.7U CN209890199U (en) | 2019-01-24 | 2019-01-24 | Movable type square-shaped maintenance platform for heating screen in circulating fluidized bed boiler hearth |
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| CN209890199U true CN209890199U (en) | 2020-01-03 |
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| CN201920119426.7U Expired - Fee Related CN209890199U (en) | 2019-01-24 | 2019-01-24 | Movable type square-shaped maintenance platform for heating screen in circulating fluidized bed boiler hearth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109694025A (en) * | 2019-01-24 | 2019-04-30 | 江苏能建机电实业集团有限公司 | The back-shaped inspection platform of movable type and application method for heating screen in boiler hearth of circulating fluidized bed |
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- 2019-01-24 CN CN201920119426.7U patent/CN209890199U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109694025A (en) * | 2019-01-24 | 2019-04-30 | 江苏能建机电实业集团有限公司 | The back-shaped inspection platform of movable type and application method for heating screen in boiler hearth of circulating fluidized bed |
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Granted publication date: 20200103 |