KR102344668B1 - Lifting apparatus for thermal power plant - Google Patents

Abstract

The present invention relates to a lifting device for a thermal power plant, for lifting a lifting subject located in a boiler furnace of a thermal power plant. The lifting device for a thermal power plant comprises: a telescoping body part having a plurality of booms and having a variable length in one direction; a rotating member disposed at one end of the booms and rotatably formed in the left and right directions from the booms; and at least one lifting member connected to the rotating member so as to be tension-controlled, and having a coupling member for coupling with the lifting subject at one end.

Description

Lifting apparatus for thermal power plant

The present invention relates to a lifting device for a thermal power plant for lifting a lifting object located in a boiler furnace of a thermal power plant, and more particularly, by providing a variable length of a portion inserted into the furnace of a boiler, so that the It relates to a lifting device for a thermal power plant with improved space utilization and easy storage after completion of work.

In general, a thermal power plant is a power generation facility that produces electric energy by rotating a turbine with high-temperature and high-pressure steam generated by burning fuel such as coal, oil, and natural gas in a boiler.

On the other hand, if the boiler is operated for a long time, soot is generated and attached to the furnace or TUBE of the boiler. If this attached suit is not removed from time to time, a huge amount of soot will continue to attach to the heat transfer tube, significantly reducing the steam generation efficiency and at the same time blocking the passage of combustion gas, making the boiler operation unstable.

To solve this problem, a soot blower is installed in the boiler. A soot blower is a device that uses a lance tube to inject high-pressure steam and blows away fly ash to restore heat transfer efficiency and clean the passage of combustion gas. It is an essential element for the operation of coal fired power. to be.

Recently, as the boiler capacity of a thermal power plant is gradually enlarged, the length of the lance tube is also increasing, and due to this increase in length, the sagging and deformation of the lance tube are increased, and there is a problem in that the connection part is damaged. In addition, during the combustion process, sulfur dioxide (H2SO3) or rust (NOX) is generated as moisture and sulfur dioxide contained in the combustion gas react, thereby causing corrosion of the lance tube.

When the lance tube is damaged or corroded in this way, the lance tube must be lifted in the furnace of the boiler using a lifting device. However, in the case of the conventional lifting device, the length of the body part inserted into the furnace is provided in a thrust type that cannot be adjusted, and when the long lance tube is lifted, a part of the lance tube is cut and lifted. Therefore, after the lance tube is repaired, the lance tube is inserted into the furnace again and then the cut portion has to be welded.

In addition, in the case of a trust-type lifting device, since it is stored as it is installed when not in use, it occupies a large storage area, and there is a problem that interference with surrounding lifting objects occurs during overhaul. Therefore, after use, each member must be disassembled and stored, which causes unnecessary waste of manpower and increases work cost.

Registered Patent Publication No. 10-2095125 (2020.04.23 Announcement)

An object of the present invention is to provide a lifting device for a thermal power plant with improved space utilization and easy storage after completion of a lifting operation by providing a variable length of a portion inserted into a furnace of a boiler.

A lifting device for a thermal power plant according to the present invention for achieving the above object is a lifting device for lifting a lifting object located in a boiler furnace of a thermal power plant, a plurality of booms having a variable length in one direction Possible expansion and contraction body portion; a rotation member disposed at one end of the boom and rotatably formed in the left and right directions from the boom; and at least one lifting member connected to the rotation member so as to be tension-controlled, and having a coupling member for coupling with the lifting object at one end.

In addition, the lifting object may be provided as a lance tube (Lance Tube) formed long in one direction.

In addition, the lifting member may be combined with a jig for preventing sagging coupled to the lance tube to lift the lance tube.

In addition, the telescoping body portion may include a boom body having an accommodating space therein so that the boom can be drawn in and out, and the boom body may be provided to be tiltable upward.

In addition, the plurality of boom bars may be inserted into the boom body by overlapping each other during storage after the lifting of the lifting object is completed.

In addition, the rotating member includes a turntable rotatably formed on the uppermost part of the boom stand among the plurality of booms, and coupled to the turntable to be interlocked with the turntable, and a portion of the turntable is formed in a direction in which the boom is drawn out. It may include a protruding connection member, coupled between the connection member and the lifting member, and at least one driving wheel for adjusting the tension of the lifting member.

In addition, the lifting member may include a wire wound around the driving wheel and connected so as to adjust the tension, and to which the hook-shaped coupling member is coupled to one end.

In addition, an outrigger disposed under the elastic body part to support the elastic body part on the ground when the lifting object is lifted, and coupled between the outrigger and the elastic body part, the elastic body part from the outrigger It may further include a tilting member for tiltably supporting.

In addition, the lifting device may further include a bogie configured to be drivable by a pair of crawler.

In addition, a camera module and a lighting device may be installed at one end of the boom stand.

In addition, the telescopic body portion provided with a plurality of booms, the length in one direction is variable; a rotation member disposed at one end of the boom and rotatably formed in the left and right directions from the boom; at least one lifting member connected to the rotation member so as to be tension-controlled, and having a coupling member for coupling with the lifting object at one end; an outrigger disposed under the telescoping body to support the telescoping body to the ground when the lifting object is lifted; and a tilting member coupled between the outrigger and the telescoping body and supporting the telescoping body in a tiltable manner from the outrigger, wherein the plurality of booms are protruded from the lower side, and the tilting member is the It includes; a connecting bar coupled to the upper side of the outrigger, a moving bar hinged to the connecting bar and supporting the telescopic body, and a cylinder coupled to the moving bar to rotate the moving bar upward or downward.

According to the present invention, as the telescopic body part inserted into the furnace of the boiler has a variable length boom, there is an advantage that storage becomes easy after the lifting operation is completed. That is, in the case of the conventional thrust-type lifting device, it is difficult to adjust the length of the body part, so it occupies a large storage area. However, according to the present invention, space utilization can be improved because only the boom stand needs to be overlapped and stored inside the boom body during storage.

In addition, in the case of a conventional thrust-type lifting device, it is difficult to adjust the length of the body portion, so each member has to be disassembled and then stored.

In addition, when the length and number of booms are adjusted as necessary, the lifting operation may be performed in response to the length of the lance tube that changes according to the capacity of the boiler.

In addition, as the boom body is provided to be tiltable upwards, it is possible to compensate for the phenomenon of the boom sagging when lifting a long and heavy lance tube.

In addition, it is possible to prevent an accident of overturning when lifting through the outrigger, and since it is provided to be drivable using a bogie, the lifting device can be transferred from the storage place to the lifting place, so there is an advantage of facilitating the operation.

1 is a perspective view of a lifting device for a thermal power plant according to an embodiment of the present invention.
Figure 2 is a perspective view showing an extended state of the boom of the lifting device shown in Figure 1;
3 is a perspective view of a lifting device for a thermal power plant according to another embodiment of the present invention.
FIG. 4 is a view showing a process of lifting the lance tube using the lifting device of FIG. 1 .

Hereinafter, with reference to the accompanying drawings, a detailed description of the lifting device for a thermal power plant according to a preferred embodiment is as follows. Here, the same reference numerals are used for the same components, and repeated descriptions and detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the invention will be omitted. The embodiments of the present invention are provided in order to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clearer description.

1 is a perspective view of a lifting device for a thermal power plant according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an extended state of the boom of the lifting device shown in FIG. 1 .

1 to 2, the lifting device 100 for a thermal power plant is for lifting a lifting object located in a boiler furnace (Furnace, 10) of a thermal power plant, and a new body part 110 and a rotating member 120 ), and a lifting member 130 may be included.

The lifting object in this embodiment is installed inside the furnace 10 of the boiler, and may be provided as a lance tube (Lance Tube, 20) elongated in one direction. However, the type of the lifting object is not limited, and any structure that is located inside the furnace 10 of the boiler and needs to be lifted is applicable. In the following description, for convenience, the lifting object will be described by applying the lance tube 20 .

The telescoping body 110 is a portion to be inserted into the furnace 10 , and may be provided with a plurality of booms 111 to have a variable length in one direction. In this way, since the length of the telescopic body part 110 can be stretched and contracted as necessary by providing a plurality of booms 111, the lifting operation can be performed in response to the length of the lance tube 20 that varies according to the capacity of the boiler. be able to

For example, the boom 111 may be stretched and contracted using a hydraulic power pack (HPU), and may be manufactured using ATOS 80, a high-strength steel for vehicles. The number and length of these booms 111 are not limited, but considering the capacity of the boiler and the length of the lance tube 20, six booms 111 are formed to be overlapping with each other and can be extended to a maximum length of about 13m. can

The telescoping body 110 may include a boom body 112 having an accommodating space therein so that the boom 111 can be drawn in and out. Accordingly, the plurality of boom rods 111 may be inserted into the boom body 112 by overlapping each other during storage after the lifting of the lance tube 20 is completed. In this way, after the lifting operation is completed, the plurality of boom stands 111 can be overlapped and inserted into the boom body 112 to be stored. can In addition, when storing the lifting device 100, in the case of the thrust-type lifting device, it was difficult to adjust the length of the body part, so each member had to be disassembled and then stored. There are advantages.

On the other hand, the boom body 112 may be provided to be able to tilt upward (tilting). For example, the boom body 112 may be tilted at an angle of about 5 to 15˚, and this tilting function compensates for the phenomenon in which the boom 111 sags when lifting the long and heavy lance tube 20 can do.

The rotation member 120 is for adjusting the direction of the lance tube 20 when the lance tube 20 is lifted, is disposed at one end of the boom stand 111 and is rotatably formed from the boom stand 111 in the left and right direction. can For example, the rotation member 120 may include a turntable 121 , a connection member 122 , and a driving wheel 123 .

The turntable 121 may be rotatably formed on an upper portion of the boom 111 located at the most distal end among the plurality of booms 111 . For example, the turntable 121 may be coupled to the uppermost end of the boom 111 , and may be formed to rotate in the left and right directions from the boom 111 .

The connecting member 122 is coupled to the turntable 121 to be interlocked with the turntable 121 , and a part thereof may protrude in the drawing-out direction of the boom 111 . That is, the connecting member 122 may be rotated in the left and right directions on the boom 111 in conjunction with the turntable 121 .

The driving wheel 123 is coupled between the connecting member 122 and the lifting member 130 , and is formed to be rotatable to adjust the tension of the lifting member 130 . For example, at least one driving wheel 123 may be provided, and a wire 132 of a lifting member 130 to be described later may be wound around each driving wheel 123 . Accordingly, when the wire 132 is released or wound according to the rotational direction of the driving wheel 123 , the tension of the wire 132 can be adjusted, and the tension of the wire 132 is adjusted to be coupled to the lifting member 130 . The lance tube 20 can be moved upward or downward.

The lifting member 130 is connected to the rotation member 120 so that tension can be adjusted, and may include a coupling member 131 for coupling with the lance tube 20 at one end. For example, the lifting member 130 may include a wire 132 wound around the driving wheel 123 and connected to a tension controllable connection member 131 coupled to one end of the hook-shaped coupling member 131 . At this time, the lance tube 20 may be coupled to a jig 30 for preventing sagging to prevent sagging due to a long length, the coupling member 131 is coupled to the jig 30 for preventing sagging and the lance tube 20 can be salvaged.

The lifting device 100 for a thermal power plant according to the present invention may further include an outrigger 140 and a tilting member 150 .

The outrigger 140 is for preventing the lifting device 100 from overturning when the lance tube 20 is lifted. (110) can be supported on the ground. For example, the outrigger 140 may include articulated legs 142 coupled to both sides of the frame 141 in pairs. That is, a total of four legs 142 can be provided so that their ends can be supported on the ground, and their positions in the vertical direction can be adjusted using joints. In this way, as the outrigger 140 is installed in the lifting device 100 , it is possible to secure safety during lifting, thereby preventing an accident of life from occurring.

The tilting member 150 may be coupled between the outrigger 140 and the telescoping body 110 and support the telescoping body 110 from the outrigger 140 to be tiltable in an upward direction. For example, the tilting member 150 includes the connecting bar 151 , the moving bar 152 , and the cylinder 153 , and may tilt the telescopic body 110 at an angle of about 5 to 10°. .

The connecting bar 151 may be vertically connected to the frame 141 of the outrigger 140 , and the moving bar 152 may be hinged to the upper portion of the connecting bar 151 in a horizontal direction. At this time, the boom body 112 is coupled to the upper portion of the moving bar 152 , so that the boom body 112 may be interlocked with the moving bar 152 .

The cylinder 153 may be coupled between the connecting bar 151 and the moving bar 152 , and the moving bar 152 may be rotated upward or downward by using the extension and contraction of a piston provided in the cylinder 153 . have. For example, when the piston is extended, the front end of the moving bar 152 may rotate upward, and the boom body 112 may also rotate upward by the rotation of the moving bar 152 . That is, the boom body 112 may be provided to be tiltable by the driving of the cylinder 153 .

3 is a perspective view of a lifting device for a thermal power plant according to another embodiment of the present invention.

Referring to FIG. 3 , the lifting device 200 for a thermal power plant may further include a bogie 160 configured to be drivable by a pair of crawlers. Accordingly, when the lifting device 200 is transported from the storage place to the lifting place, the lifting device 200 can be more easily transported when the cart 160 is used.

Meanwhile, although not shown, a camera module and a lighting device may be installed at one end of the boom 111 . For example, the camera module and the lighting device may be coupled to the front end of the boom 111, and may be controlled from the outside using a communication module. Accordingly, when the lifting operation is performed while monitoring the image captured by the camera module after driving the lighting device in the furnace 10 of the dark boiler, it is possible to lift without the operator directly observing the inside of the furnace 10 . This has the advantage of facilitating the operation.

FIG. 4 is a view showing a process of lifting the lance tube using the lifting device of FIG. 1 . The lifting process of the lance tube 20 using the lifting device 100 will be described with reference to FIG. 4 as follows.

A lance tube 20 for removing the soot adhering to the water pipe of the boiler may be installed on the inner bottom of the furnace 10 (see FIG. 4A ). A plurality of injection holes through which steam can be injected are perforated in the lance tube 20, so that the soot adhering to the water pipe can be removed with high-pressure steam.

On the other hand, in order to repair or replace the lance tube 20 due to corrosion or deformation of the lance tube 20 , the lance tube 20 must be lifted from the inside of the furnace 10 and taken out. To this end, first, the lifting device 100 is moved to the vicinity of the furnace 10 using the cart 160 , and then the boom 111 is introduced into the doorway 10a formed on one surface of the furnace 10 . The boom stand 111 is drawn out from the boom body 112 (see FIG. 4b ).

After that, when the end of the boom body 112 coincides with the center of the lance tube 20, the drive wheel 123 is rotated in one direction to release the wire 132 located at the end of the boom body 112 (see FIG. 4c). ).

Then, the coupling member 131 located at the end of the wire 132 is caught by the jig 30 for preventing sagging fastened to the lance tube 20, and then again by rotating the drive wheel 123 in the opposite direction to the wire 132. wraps the Accordingly, the lance tube 20 coupled to the coupling member 131 moves upward (see FIG. 4d ).

When the lance tube 20 moves upward and is arranged in parallel with the position of the entrance 10a, the lance tube 20 is rotated 90° from the boom 111 using the rotation member 120 . Then, the end of the lance tube 20 is disposed to face the entrance (10a) (refer to FIG. 4e).

After that, the boom body 111 drawn out from the boom body 112 is overlapped and introduced into the boom body 112 again (see FIG. 4f ). Accordingly, the boom stand 111 is contracted and the end is moved out of the doorway 10a, and the lance tube 20 can be safely withdrawn out of the doorway 10a in conjunction with the boom stand 111.

As described above, in the lifting device 100 for a thermal power plant, as the telescopic body part 110 inserted into the furnace 10 of the boiler is provided with a variable length boom 111, after the lifting operation is completed It has the advantage of being easy to store. That is, in the case of the conventional thrust-type lifting device, it is difficult to adjust the length of the elastic body part 110 and occupies a large storage area. Therefore, space utilization can be improved.

In addition, in the case of a conventional thrust-type lifting device, it is difficult to adjust the length of the body portion, so each member has to be disassembled and then stored.

In addition, if the length and number of the boom stand 111 is adjusted as needed, the lifting operation may be performed in response to the length of the lance tube 20 that changes according to the capacity of the boiler.

In addition, as the boom body 112 is provided to be tiltable upward, it is possible to compensate for the phenomenon in which the boom stand 111 sags when the long and heavy lance tube 20 is lifted.

In addition, it is possible to prevent an accident from overturning when lifting through the outrigger 140 , and it is provided to be drivable using the bogie 160 so that the lifting device 100 can be transferred from the storage place to the lifting place. This has the advantage of being facilitated.

Although the present invention has been described with reference to an embodiment shown in the accompanying drawings, which is merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. will be able Accordingly, the true scope of protection of the present invention should be defined only by the appended claims.

110: elastic body part
120: rotation member
121: turntable
122: connecting member
123: drive wheel
130: lifting member
131: hook
132: wire
140: outrigger
150: tilting member
151: connection bar
152: move bar
153: cylinder
160: bogie

Claims (10)

In a lifting device for lifting a lifting object located in a boiler furnace of a thermal power plant,
a telescoping body having a plurality of booms having a variable length in one direction;
a rotation member disposed at one end of the boom and rotatably formed in the left and right directions from the boom;
at least one lifting member connected to the rotation member so as to be tension-controlled, and having a coupling member for coupling with the lifting object at one end;
an outrigger disposed under the telescoping body to support the telescoping body to the ground when the lifting object is lifted; and
Including; a tilting member coupled between the outrigger and the telescoping body part, and tiltably supporting the telescoping body part from the outrigger;
A plurality of the boom is formed with a lower side protruding,
The tilting member includes a connecting bar coupled to the upper side of the outrigger, a moving bar hinged to the connecting bar and supporting the telescopic body, and a cylinder coupled to the moving bar to rotate the moving bar upward or downward. Useful lifting device.
According to claim 1,
The lifting object is a lifting device for a thermal power plant provided as a lance tube (Lance Tube) formed long in one direction.
3. The method of claim 2,
The lifting member is a lifting device for a thermal power plant in combination with a jig for preventing sagging fastened to the lance tube to lift the lance tube.
According to claim 1,
The lifting device for a thermal power plant including a boom body having an accommodating space therein so that the telescopic body part can be drawn in and out of the boom.
5. The method of claim 4,
A lifting device for a thermal power plant that is inserted into the boom body by overlapping with each other during storage after the lifting of the lifting object is completed.
According to claim 1,
The rotating member is
a turntable rotatably formed on the uppermost part of the boom stand among the plurality of boom stands;
a connecting member coupled to the turntable and formed to be interlocked with the turntable, a part of which protrudes in the direction of drawing out the boom;
A lifting device for a thermal power plant coupled between the connection member and the lifting member, and comprising at least one driving wheel for adjusting the tension of the lifting member.
7. The method of claim 6,
The lifting member is wound on the driving wheel and connected to a tension controllable, and the lifting device for a thermal power plant includes a wire to which the hook-shaped coupling member is coupled to one end.
delete According to claim 1,
The lifting device is a lifting device for a thermal power plant further comprising a bogie formed to be drivable by a pair of crawler.
According to claim 1,
A lifting device for a thermal power plant in which a camera module and a lighting device are installed at one end of the boom.

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