CN111675111A

CN111675111A - Boiler hoisting sling in closed plant area and construction method

Info

Publication number: CN111675111A
Application number: CN202010558947.XA
Authority: CN
Inventors: 肖俊; 杨龙
Original assignee: Hubei Industrial Building Group Installation Engineering Co ltd
Current assignee: Hubei Industrial Building Group Installation Engineering Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-09-18

Abstract

The invention relates to a boiler hoisting sling in a closed factory, which comprises an underframe, fixed track beams, a movable track beam, a cat-head crane and a hoist, wherein the underframe is fixed on the ground, the top of the underframe is provided with a plurality of fixed track beams, the movable track beam is suspended below the fixed track beams through the cat-head crane, and the hoist is arranged on the movable track beam. A construction method for lifting a boiler in a closed factory comprises the following steps: hardening the ground foundation; leveling the ground foundation, and mounting a bottom layer frame on the ground foundation after the levelness meets the requirement; installing 6 stand columns on the bottom layer frame, and calibrating the verticality; and installing a fixed track beam, and sequentially installing, hanging a cat head, moving the track beam and a hoist after the fixed track beam is installed and qualified through inspection. In the process of hoisting in a closed factory building, the hoisting process is flexible to rotate, safe and reliable, the manpower input is effectively reduced, the labor production efficiency is improved, and the construction progress is accelerated.

Description

Boiler hoisting sling in closed plant area and construction method

Technical Field

The invention relates to the field of lifting appliances, in particular to a boiler lifting appliance in a closed factory and a construction method.

Background

With the rapid development of the building industry in China, the extension projects are gradually increased, and the extension projects refer to that main vehicles or engineering projects are newly built in original factory areas in order to expand original production capacity (or benefit) of original enterprises and public institutions. In an extension project, large-scale member hoisting construction in a building is inevitably carried out, the space is closed, the construction requirements of large-scale hoisting equipment such as a truck crane and a crawler cannot be met, the large-scale member hoisting construction can only be carried out by manual assistance through a winch, the construction efficiency is low, the large-scale member hoisting construction is limited by the position of a hoisting point of a hanging hoist, and the operation safety risk of workers is high.

For example, a municipal domestic waste incineration power generation environmental protection project in a certain city is to expand a waste incineration production line with a rated waste treatment capacity of 500 tons/day in an original factory area, each waste incineration production line is provided with a flue gas purification device of a combined process of 'SNCR + rotary spray semi-dry desulfurization + lime nitrate and activated carbon injection + bag type dust remover', and a waste heat boiler with a rated evaporation capacity of 44t/h and a suction condensing steam turbine generator set with a rated output of 15MW are constructed in a matched manner.

The boiler of the project is installed as an extension project in an old factory building, the periphery and the top of the factory building are sealed, a steel frame, a steam drum and various large-scale equipment are required to be carried out in a narrow and limited closed space, the operation environment is complex, and the space is narrow.

Disclosure of Invention

The invention aims to solve the technical problem of providing a boiler hoisting sling in a closed factory and a construction method, so as to overcome the defects in the prior art.

The technical scheme for solving the technical problems is as follows: the utility model provides a boiler hoist and mount hoist in closed factory, includes chassis, fixed track roof beam, removal track roof beam, cat head hangs and calabash, and the chassis is fixed in subaerially, and the top of chassis is provided with many fixed track roof beams, and the removal track roof beam hangs in the below of fixed track roof beam through cat head, installs the calabash on the removal track roof beam, and the moving direction of calabash on the removal track roof beam is perpendicular mutually with the moving direction of cat head on the fixed track roof beam.

The invention has the beneficial effects that: the equipment is transferred to the hoist operation range, the hoist is used for lifting the equipment to a safe height, the hoist travels on the movable track beam, the movable track beam travels on the fixed track beam, the equipment is lifted to a designated position and then is placed, binding is removed, and the hoist is hooked back; the hoisting sling is flexible and changeable, the overall size of the sling can be properly adjusted according to the specific space of the current factory building and the boiler to be hoisted, so that the current use environment is better matched, the action range is wide, and the practicability is high; the lifting appliance with the structure is convenient for covering the whole boiler, so that during lifting, no dead angle can be realized at any corner of the boiler, the safety coefficient is high, repeated disassembly and assembly are not needed, and the boiler equipment is better protected; the underframe is used as a self bearing steel frame, and a steel frame of a boiler is not needed, so that the boiler is safer.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the number of the fixed track beams arranged on the underframe is three.

Furthermore, the number of the cat head cranes is three, the three cat head cranes are respectively arranged on the three fixed track beams, and the movable track beam is suspended below the three fixed track beams through the three cat head cranes.

Furthermore, the fixed track beam is made of HW440 x 300 x 11 x 18I-steel and is made of Q235.

Further, I45A I-shaped steel is adopted by the movable track beam.

Further, the cat head crane adopts a 10T cat head crane.

Further, the hoist adopts a 10T electric hoist.

The beneficial effect of adopting the six steps is as follows: can effectively meet the hoisting requirement and ensure the normal hoisting.

Further, the underframe comprises a bottom layer frame, upright posts, inclined struts and cross beams, wherein the bottom layer frame is provided with two rows of upright posts, each row comprises three upright posts, the upright posts in the same row are connected through the inclined struts, and the upright posts in the same row are connected through the cross beams; two ends of the fixed track beam are respectively connected with the top ends of the two upright posts.

Furthermore, the bottom layer frame is formed by splicing HW 440H-400H-13H-shaped steel, and the material is Q235 steel; the inclined strut is made of HW 200X 8X 12H-shaped steel and is made of Q235 steel; the cross beam is made of HW 200X 8X 12H-shaped steel and is made of Q235 steel; the upright column is made of phi 377 multiplied by 10 seamless steel pipes and is made of Q235 steel.

The beneficial effects of the two steps are as follows: can be effectual for hoist and mount provide stable support.

A construction method for lifting a boiler in a closed factory comprises the following steps:

s100, hardening the ground foundation;

s200, leveling the ground foundation, and mounting a bottom layer frame on the ground foundation after the levelness meets the requirement;

s300, installing 6 upright posts on the bottom layer frame, and calibrating the verticality;

s400, mounting the fixed track beam, and sequentially mounting, hanging the cat head, moving the track beam and the hoist after the fixed track beam is mounted and accepted.

Drawings

FIG. 1 is a side view of a boiler lifting sling in a closed factory floor in accordance with the present invention;

FIG. 2 is a top view of a boiler lifting sling in a closed factory floor in accordance with the present invention;

fig. 3 is a partial structural view of a boiler lifting sling in a closed factory area according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the movable track beam comprises an underframe, 110, a bottom layer frame, 120, upright columns, 130, inclined struts, 140, cross beams, 2, a fixed track beam, 3, a movable track beam, 4, a cat-head crane, 5 and a hoist.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1-3, a boiler hoisting sling in a closed factory area comprises an underframe 1, a fixed track beam 2, a movable track beam 3, a cat-head crane 4 and a hoist 5, wherein the underframe 1 is fixed on the ground, the top of the underframe 1 is provided with a plurality of fixed track beams 2, the movable track beam 3 is suspended below the fixed track beam 2 through the cat-head crane 4, the hoist 5 is mounted on the movable track beam 3, the moving direction of the hoist 5 on the movable track beam 3 is perpendicular to the moving direction of the cat-head crane 4 on the fixed track beam 2, during hoisting operation, the hoist 5 moves on the movable track beam 3, and the movable track beam 3 moves on the fixed track beam 2, so that the hoisting requirement in a hoisting operation area is met.

Due to other reasons, the roof of the factory building cannot be dismantled, so that a hoisting tool cannot be erected outside the factory building; because of the hoist and mount operation region is in closed factory building, crane operation space can not be ensured, uses this hoist, accords with the regional internal environment requirement of operation promptly, also can ensure hoist and mount demand in the construction, and in addition, this hoist still is applicable to the work such as the hoist and mount of all equipment such as boiler steelframe, water-cooling wall, steam pocket in the closed factory, can extend even for transportation and installation of all kinds of main equipment in the confined space, all has the guide effect to other traditional main equipment hoist and mount constructions in addition.

Example 2

As shown in fig. 1 to fig. 3, this embodiment is a further improvement on embodiment 1, and is specifically as follows:

the number of the fixed track beams 2 arranged on the underframe 1 is three.

Furthermore, the number of the cat-head cranes 4 is three, the three cat-head cranes 4 are respectively mounted on the three fixed track beams 2, and the movable track beam 3 is suspended below the three fixed track beams 2 through the three cat-head cranes 4.

Of course, the number of the fixed track beams 2 can also be multiple, such as four, five, two, etc., and the number of the cat-head cranes 4 is at least two, preferably, the number of the cat-head cranes 4 is equal to the number of the fixed track beams 2.

Example 3

As shown in fig. 1 to fig. 3, this embodiment is a further improvement on embodiment 1 or 2, and is specifically as follows:

the fixed track beam 2 adopts HW440 x 300 x 11 x 18I-steel, and is made of Q235; the movable track beam 3 is made of I45A I-steel; the cat head crane 4 adopts a 10T cat head crane 4; the hoist 5 adopts a 10T electric hoist, the 10T electric hoist is used, the load of the electric hoist is 10T, and the load of the electric hoist on the movable track beam 3 is G-13T-130 KN by considering the factors such as the self weight of the electric hoist, the lifting acceleration and the like; the hoisting requirements can be effectively met, and the hoisting requirements such as shearing resistance, bending resistance, tensile strength, maximum load and the like are particularly met.

Example 4

As shown in fig. 1 to 3, this embodiment is a further improvement on any one of embodiments 1 to 3, and specifically includes the following steps:

the underframe 1 comprises a bottom layer frame 110, upright posts 120, inclined struts 130 and cross beams 140, wherein two rows of upright posts 120 are arranged on the bottom layer frame 110, three upright posts are arranged in each row, the upright posts 120 in the same row are connected through the inclined struts 130, and the upright posts 120 in the same row are connected through the cross beams 140; the two ends of the fixed track beam 2 are respectively connected with the top ends of the two upright posts 120.

The bottom layer frame 110 is formed by splicing HW440, 400, 13, 21H steel sections, and is made of Q235 steel; the inclined strut 130 is made of HW 200X 8X 12H-shaped steel and is made of Q235 steel; the beam 140 is made of HW200 × 8 × 12H steel, and is made of Q235 steel; the upright post 120 is made of phi 377 multiplied by 10 seamless steel pipes and is made of Q235 steel.

s100, hardening the ground foundation;

s200, leveling the ground foundation, and installing the bottom layer frame 110 on the ground foundation after the levelness meets the requirement;

s300, installing 6 upright posts 120 on the bottom layer frame 110, and calibrating verticality;

s400, installing the fixed track beam 2, and sequentially installing, the cat head crane 4, the movable track beam 3 and the hoist 5 after the fixed track beam 2 is installed and accepted.

The reasons for hardening the ground foundation are:

the underframe 1 is divided into a fixed load and a movable load for the ground load, the movable load is larger than the fixed load, and in order to ensure the safe use of equipment, the uneven settlement of the foundation in the use process is avoided, so that the ground foundation needs to be hardened.

S100, the concrete construction steps are as follows:

in order to ensure the foundation strength under the underframe 1, the soil under the underframe needs to be treated, a groove is excavated according to the field conditions, the excavation width of the groove is not less than 1 meter, the depth of the groove is not less than 1.5 meters, the groove is backfilled after excavation is finished, pseudo-ginseng gray soil can be used for backfilling (if the original soil meets the requirements, the original soil can be used for backfilling), the thickness of each layer of the backfilled gray soil cannot exceed 250mm, each layer of backfilled gray soil is allowed to be compacted by a machine tool, and the compacting times are 3-5 times;

after the groove is backfilled, reserving 150-grade and 200-mm thick sand for concrete pouring, wherein the thickness grade of the poured concrete is not less than C25, the pouring thickness is not less than 150mm, the pouring width is not less than 1m, the surface of the concrete is plastered after the concrete pouring is finished, then the concrete is maintained, after the maintenance period is finished, the foundation can be accepted, and after the acceptance is qualified, the next procedure can be carried out.

The leveling treatment in the S200 comprises the following specific steps:

before the bottom layer framework 110 is installed, the ground foundation plane needs to be leveled, so that the levelness of the foundation can meet the requirement; selecting two ends and three middle points in the leveling process, measuring the height difference between the three points by using a level gauge, selecting and polishing the surface of the concrete foundation according to the measurement result to ensure that the surface of the foundation meets the installation requirement of the bottom layer framework 110, checking and accepting after the surface treatment is finished, extracting a plurality of points on any surface of the foundation, measuring the elevation by using the level gauge, and ensuring that the height difference between the extracted points is not more than 10 mm;

after the surface treatment of the foundation is finished, the bottom layer framework 110 is installed, all side frames are installed firstly, and after all the side frames are welded, all the side frames are connected; the acceptance of the bottom layer frame 110 is required after completion, and the acceptance requirements are as follows: measuring four corners of the frame by using a level meter, and ensuring that the height difference of the four corners is not more than 10 mm; detecting the contact condition of the bottom layer frame 110 and the surface of the foundation, detecting by using a feeler gauge to ensure that the contact surface of the frame and the surface of the foundation exceeds 80 percent, and filling the suspended section by using steel plates of 1mm and 2 mm; and measuring the diagonal line of the frame to ensure that the error of the diagonal line does not exceed 20 mm.

S300, the concrete construction steps are as follows:

after the construction of the bottom layer frame 110 is completed, the upright columns 120 are installed, the construction can be performed by using a truck crane when the upright columns 120 are installed, the inspection and acceptance are required after the installation of the upright columns 120 is completed, and the verticality of the six upright columns 120 is detected by using a theodolite, so that the levelness of the upright columns 120 meets the requirement (the verticality deviation is less than one thousandth of the length of the upright columns and less than 15 mm); the appearance inspection is carried out on the connection welding at each position, the welding has no defects of slag inclusion, undercut, air holes, incomplete penetration and the like, the welding seam is well formed, and each connection welding seam is ensured to meet the requirements; checking the center deviation of the butt joint surface at the butt joint position to ensure that the center deviation of the butt joint surface is less than 1.5 mm; checking the connecting plate to ensure that the connecting plate is flat, correct in position and clings to the component; the beams 140 are inspected to ensure that the difference in height of the beams 140 is less than 10 mm.

S400, the concrete construction steps are as follows:

firstly, mounting a fixed track beam 2, and mounting a movable track beam 3 after the fixed track beam 2 is mounted and accepted; in the process of checking and accepting the fixed track beams 2, the elevations of the three fixed track beams 2 need to be checked, and the difference of the elevations of the three fixed track beams 2 is ensured to be less than 10 mm; checking the connecting plate of the fixed track beam 2 to ensure that the connecting plate is flat, correct in position and clings to a component; the joint of the upright post 120 and the fixed track beam 2 is checked to ensure that the weld joint at the joint has no defects of slag inclusion, undercut, air holes, incomplete penetration and the like, and the weld joint is well formed;

after the fixed track beam 2 is installed, the cat-head crane 4 is installed, after the cat-head crane 4 is installed, the cat-head crane needs to travel on the fixed track beam 2 once, the cat-head crane 4 is ensured to smoothly travel on the fixed track beam 2, the movable track beam is installed, and the centers of the 3 cat-head cranes are ensured to be on the same straight line when the movable track beam is installed; after the movable track beam 3 is installed, checking a connecting plate at the joint of the movable track beam 3 to ensure that the connecting plate is flat and is attached to a component in a correct position; the welding seam at the connecting plate is checked, the welding seam at the connecting position is ensured to have no defects of slag inclusion, undercut, air holes, incomplete penetration and the like, and the welding seam is well formed; the connecting lifting lugs on the movable track beam 3 are checked, the appearance size of the lifting lugs is ensured to meet the requirements, and the lifting lugs and the cat-head crane 4 are ensured to be connected and fastened reliably; and (4) checking the height difference of the movable track beam 3, wherein the error of the height difference of the movable track beam 3 is within +/-10 mm.

Electric hoist mounting

According to GB50278-2010 hoisting equipment installation engineering and acceptance criteria; and (4) installing the electric hoist, checking and accepting the electric hoist according to the standard after the electric hoist is installed, performing overall checking and accepting after the electric hoist is qualified, and performing an electric hoist load test after all checking and accepting are completed.

Electric hoist load test

Before the load test, the mechanical and electrical parts of the electric hoist are comprehensively checked according to the product specification, a power supply is switched on after the electric hoist is detected to be completed, whether the steering directions of the traveling mechanism motor and the hoisting mechanism motor are correct or not is checked, and whether the manipulator is consistent with the actual operation or not is checked.

The method comprises the steps of firstly carrying out empty load test run, operating the electric hoist to run back and forth on the whole track, checking whether the machine is jammed or abnormal sound or not, and whether the electric element has poor contact. The lifting hook rises and falls three times up and down, and whether the upper part and the lower part of the limiter are good or not is checked. During the static load test, the electric hoist lifts the rated load, is 100mm away from the ground, statically hangs 10 minutes, and checks that cracks, damages and abnormal phenomena cannot occur at each part. In an overload test, an electric hoist lifts a rated load which is 1.25 times of the rated load, lifts the electric hoist 100mm away from the ground, hangs the electric hoist for 10 minutes, and checks whether the track and the lifting hook deform or not; finally, the action is in accordance with the test, the electric hoist is hoisted by 1.1 times of rated load, whether the brake is reliable or not, whether the steel wire rope is loosened or not and whether the lifting hook is deformed or not are checked, and then the electric hoist runs on the whole track for several times to see whether the electric hoist runs stably or not, whether friction and impact sound exists or not and whether the limiting is accurate or not; meanwhile, a walking conformance test of the cat-head crane 4 is carried out, and whether the walking of the cat-head crane 4 on the fixed track beam 2 is stable, whether friction and impact sound exist or not and whether the limiting is accurate or not are checked when the walking conformance test is carried out.

After the electric hoist is qualified after the test is met, the electric hoist can be put into engineering for use.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a boiler hoist and mount hoist in closed factory, its characterized in that, includes chassis (1), fixed track roof beam (2), removes track roof beam (3), cat head and hangs (4) and calabash (5), chassis (1) is fixed in subaerially, the top of chassis (1) is provided with many fixed track roof beam (2), remove track roof beam (3) hang through cat head hang (4) in the below of fixed track roof beam (2), install on removing track roof beam (3) calabash (5), calabash (5) in remove the moving direction on track roof beam (3) with cat head hang (4) the moving direction on fixed track roof beam (2) mutually perpendicular.

2. The boiler lifting sling according to claim 1, wherein the number of the fixed track beams (2) arranged on the base frame (1) is three.

3. The boiler hoisting sling according to claim 2, wherein the number of said cat-head cranes (4) is three, three of said cat-head cranes (4) are respectively mounted on three of said fixed track beams (2), and said movable track beam (3) is suspended below said three fixed track beams (2) by means of three cat-head cranes (4).

4. A boiler lifting sling according to claim 1, wherein said fixed track beam (2) is made of HW440 x 300 x 11 x 18 i-steel and is made of Q235.

5. A boiler lifting sling according to claim 1, wherein the movable rail beam (3) is I45A I-steel.

6. A boiler lifting sling according to claim 1, wherein the cat-head sling (4) is a 10T cat-head sling (4).

7. A boiler lifting sling in a closed factory area according to claim 1, wherein the hoist (5) is a 10T electric hoist.

8. The boiler hoisting sling in a closed factory area according to claim 1, wherein the underframe (1) comprises a bottom frame (110), columns (120), diagonal braces (130) and cross beams (140), wherein two rows of the columns (120), three in each row, are arranged on the bottom frame (110), the columns (120) in the same row are connected through the diagonal braces (130), and the columns (120) in the same row are connected through the cross beams (140); and two ends of the fixed track beam (2) are respectively connected with the top ends of the two upright posts (120).

9. The boiler lifting sling according to claim 8, wherein the bottom framework (110) is assembled from HW440 x 400 x 13 x 21H-section steel, and is made of Q235 steel; the inclined strut (130) is made of HW 200X 8X 12H-shaped steel and is made of Q235 steel; the cross beam (140) is made of HW 200X 8X 12H-shaped steel and is made of Q235 steel; the upright post (120) is made of phi 377 multiplied by 10 seamless steel pipes and is made of Q235 steel.

10. A construction method for lifting a boiler in a closed factory is characterized by comprising the following steps:

s100, hardening the ground foundation;

s200, leveling the ground foundation, and installing a bottom layer frame (110) on the ground foundation after the levelness meets the requirement;

s300, installing 6 upright posts (120) on the bottom layer frame (110), and calibrating verticality;

s400, installing the fixed track beam (2), and sequentially installing the fixed track beam (2), the cat head crane (4), the movable track beam (3) and the hoist (5) after the fixed track beam is installed and accepted.