RU20067U1 - INSTALLATION DEVICE FOR TECHNICAL EQUIPMENT - Google Patents

Description

Fixture for the installation of technical equipment.

This technical solution relates to the field of devices used for the installation of technical equipment, and in particular, to the installation of steam boilers for combined cycle plants of thermal power plants.

The usual means for mounting heavy large-sized modules of technical equipment are bridge cranes, for which production facilities where this equipment is to be installed must be equipped, such as, for example, the lifting device disclosed in application RU 95110942/11.

However, far from always equipping production facilities on an ongoing basis with expensive bridge cranes is economically feasible, since in many cases a crane is not used in the normal operation of the equipment.

An alternative to overhead cranes is self-propelled, including automobile cranes. But the use of such cranes inside production facilities is associated with significant inconvenience due to lack of space. Particular difficulties in using universal lifting equipment arise when installing equipment inside the supporting frame of a mounted technical object.

The latter, in particular, relates to combined cycle plants

(CCGT) thermal power plants. An important element of CCGT is

steam boiler in which heat is exchanged between

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boilers to steam, which, in turn, is used to propel steam turbines that also generate electricity. LGU steam boilers are assembled from modules mounted in a suspended state inside the boiler frame. Inside the frame, the modules are parallel to each other in several vertical rows, and in each vertical row the upper module is attached from below to the upper beams of the supporting frame, and each subsequent one to the module located above it. The weight of each module is several tens of tons.

Also known are hydraulic lifts used for the installation of large-sized technical facilities, including LGU boilers. A number of hydraulic lifts differing in the amount of generated force (up to 1000 tons) are supplied, in particular, by the British company PSC Freyssinet Ltd.

A feature of the hydraulic lift is a special piston of the hydraulic cylinder having an axial channel for the passage of a power cable through it. At the outer end of the piston and from the opposite end, on the body of the hydraulic elevator, alternately working cable fixing devices are fixed. The hydraulic lift is mounted on a support platform above the load to be lifted. The end of the cable passed through the axial channel of the hydraulic lift is fixed to the load and, with the piston fully retracted into the hydraulic cylinder, clamp the cable with a locking device mounted on its outer end located on top. Then, liquid is supplied to the hydraulic cylinder, and accordingly, the piston makes a direct stroke, lifting the load. When the hydraulic lift piston is fully extended from

housing, the lower fixing device fixed to the housing, in turn, fixes the cable, and the upper one releases the cable and the piston returns to the retracted position. Then, the upper locking device clamps the cable again, and the lower one releases it, allowing the lift to lift the load to a new step in height equal to the length of the piston stroke of the hydraulic lift. Further, the cycles are repeated until the load rises to the required height. The cable coming out of the hydraulic lift is directed through the kink down to the receiving coil, which is installed at ground level, or the floor of the room in which the equipment is mounted. Hydraulic lifts provide lifting speeds of up to 1 m / min.

Closest to the present technical solution is the device for mounting modules of the LGU steam boiler described in the brochure of PSC Freyssinet Ltd. The device contains a hydraulic lift and a temporary support platform for it, which is fixedly mounted on the upper beams of the steam boiler frame directly above the seat of the mounted vertical row of modules. The module delivered to the boiler assembly site on the vehicle is placed under its seat and lifted by a hydraulic lift to a height sufficient to bring the vehicle under it with the second module from the mounted vertical row. The second module is fixed from the bottom to the first using standard mounts and the described procedure is repeated until the assembly of the entire vertical row is completed. Then, the assembled row is raised until the upper module reaches the level of the upper beams of the frame and the standard fastenings are fixed on them

top module. To assemble the next vertical row of modules, the support platform of the hydraulic lift is dismantled and fixed on the frame in a new place.

The use, when installing CCGT boilers, of a support platform that provides only a fixed position of the hydraulic elevator during the lifting of the modules places high demands on the accuracy of installation of the support platform, since the installation error can lead to the inability to fix the already assembled vertical row of modules in the frame.

In addition, the hydraulic lifts themselves are expensive, require automated control of the process of lifting the load and the use of special rigid lifting cables, the design of which provides for their protection from damage by cable fixing devices. At the same time, for used hard and thick cables, a considerable height space is required above the upper mark to which the installed equipment rises. The latter can create difficulties during installation inside production facilities.

The objective of this technical solution is to create such a lifting device for the installation of equipment of a technical facility, which would be inexpensive and convenient to operate and would provide low labor costs when carrying out work on lifting equipment inside the frame of a technical facility.

The problem is solved in that in the device for lifting equipment mounted inside the frame of a technical object, including at least one cable-containing lifting device configured to be mounted on the frame from above

and capable of lifting the load attached to the cable vertically below it, according to the technical solution, the device contains at least two lifting devices, while it is made with the possibility of horizontal movement of the lifting devices in the process of lifting the load.

An important feature of the proposed device, which distinguishes it from an overhead crane, is the use of the frame of a technical object as a support for lifting devices, which simplifies and cheapens the installation of technical equipment. Such a device allows not only to lift the mounted equipment in a vertical direction, but also to move it horizontally in a raised state, if necessary according to the installation conditions.

It is advisable that the device contains a rigid support for the lifted equipment, substantially protruding beyond the overall dimensions of the equipment in at least one horizontal dimension while the support is made to be lifted together by all lifting devices.

A rigid support having a predetermined configuration such that it stands for the overall dimensions of the equipment allows the installation of lifting devices at the top of the frame in places where their cables can be freely passed down to secure them to the support. This extends the capabilities of the device, as it allows for installation in conditions where there is no free space above the seat of the equipment being mounted.

the trolley carrying it, as well as at least one rail track that can be mounted on the frame for moving the trolley along it with at least one lifting device in the process of lifting the load. In particular, both lifting devices can use one rail common to them. In another embodiment, lifting devices can be installed each on its own rail track. In another case, it may be desirable to permanently fix one of the lifting devices on the frame of the mounted technical object and install another on a rail track also fixed to the frame.

In the implementation of the device for mounting the steam boiler modules of the combined cycle gas turbine power plant installation, the seats of which are located inside the steam boiler frame arranged in horizontal rows one above the other, the device contains one rail track common for lifting devices, which can be mounted on the steam boiler frame above the landing rows places of modules, longitudinally in rows, while the rail track allows you to install lifting devices at a distance from each other exceeding the lengths number of seats modules so that their cables are being lowered down, are outside the opposite ends of the rows of seats modules. That is, the lifting devices are placed on the frame of the technical object in places where their cables can be passed, while the modules are mounted close to each other so that there is no free space directly above the seats of the lower rows of modules.

In this case, it is advisable that the support contains two identical, made of rigid rods in the form of isosceles triangles, each of which is adapted for connection at the top of the triangle with the cable of the lifting device, the support also contains two transverse beams made with the possibility of bringing from below under the module, mounted on a vehicle, the length of the transverse beams exceeds the length of the row of seats of the modules, while the rods traverse lying at the base of the triangles and the transverse beams the ends are connected to each other so that they form a rectangular frame to support the lifting module, resting on the transverse beams.

For reliable fixation of the module on the support, it is also advisable that the distance between the transverse beams of the support is at least half the length of the module.

In the future, the proposed technical solution and the features of its application are discussed in detail on the example of the installation of the steam boiler modules of the Leningrad State University of thermal power plants with reference to the drawings, on which:

Fig, 1 depicts a side view of a device for mounting technical equipment, containing lifting devices installed on the frame of the steam boiler of Leningrad State University, and a rigid support to support the lifting technical equipment, elements external to the device are shown by dashed lines;

FIG. 2 is a front view of a fixture for mounting technical equipment in the setting shown in FIG. 1;

FIG. 3 is a front view of a lifting device in the device shown in FIG. 1;

FIG. 4 is a perspective view of a rigid support for supporting technical equipment to be lifted in the fixture shown in FIG. 1;

FIG. 5 illustrates the installation procedure of a steam boiler module lifted on a rigid support. FIG. 2.

The composition of the device in its preferred implementation when installing the modules of a steam boiler of a CCGT unit is illustrated in FIG. 1 and 2. The device contains two identical lifting devices 1, made with the possibility of horizontal movement along the rail 2. Each lifting device 1 contains a cable 3, mounted on the load to be lifted.

The rail 2, formed by rail beams 4, and the transverse beams connecting them 5. Rail beams 4 are detachably fixed, for example, with bolts to the beams 5. In turn, the beams 5 are fastened, for example, also with bolts on the frame external to the adaptation 6 steam boiler CCGT. The frame 6 has side walls 7, which play the role of a support for lifting devices 1.

The device also contains a rigid support 8, designed to support the mounted module 9 of the steam boiler CCGT. In the initial position, the module 9 is mounted on the vehicle 10 used to deliver the module 9 to the place of its installation. The weight of one module is 70 tons.

12 has two rows of wheels 13 for moving the lifting device 1 along the rail track. The movement of the lifting device 1 sets the motor 14, transmitting the rotation force to the wheels 13.

The winch 11 contains a cable drum 15. The drum 15 is driven into rotation by an electric motor 16 through a gear reducer (not shown). A cable 3 is fixed on the drum 15, which, for lifting the load, is wound on the drum 15 during its rotation. With the opposite direction of rotation of the drum 15, the cable 3 is issued from the lifting device 1. With the cable 3 is connected a means 17 for connecting the cable 3 with the load, equipped with a hook 18.

The operation of the lifting device 1 is controlled by applying electrical signals from a hand control panel (not shown). The operation of both lifting devices can be synchronized when controlling them from one remote control.

In the preferred, from the point of view of cost, implementation of the device, which also minimizes the cost of installing a CCGT steam boiler, the lifting capacity of each lifting device 1 is designed to lift one module of the steam boiler, i.e., can not exceed 70 tons, or be selected with a small by stock.

A number of such lifting devices of various load capacities are offered for sale, for example, by the Finnish company KONE OY. Other hoisting devices of a similar principle of operation, as well as the PSC Freyssinet Ltd hydraulic hoists mentioned above, can be used, provided that their support platforms are made in the form of trolleys adapted to move along a rail track.

FIG. 4 illustrates the construction of a rigid support for the steam boiler modules of a CCGT boiler. The support 8 includes support beams 19 and a beam 20. The beam 20 is formed by rigid rods 21 and a beam 22, preferably of steel or other material suitable for strength, taking into account the weight of the module 9. The rods 21 and the beam 22 are connected, for example, by welding in the form of an isosceles triangle, the base of which is a beam 22.

The support 8 is made with the possibility of lifting it simultaneously by both lifting devices 1 (Fig. 3), for this each of the traverses 20 comprises, fixed to the rods 21, for example, by means of welding, an eye 23 adapted for engagement with a hook 18 of the lifting device 1. The ends of the beams 19 are detachably, for example, bolted to the ends of the beam 20 so that the beams 19 and beam 20 form a rectangular frame to support the module 9, as shown in FIG. 2.

The dimensions of the traverses 20 are selected taking into account the dimensions of the module 9. For reliable support of the module 9, it is preferable that the distance between the beams 19 of the support 8 is at least half the length of the module 9, as illustrated in FIG. 2. The height of the yoke 20 should be chosen so that the eyes 23 of the yoke 20 are above the center of gravity of the module 9 when it is mounted on the support 8. It is preferable that the eyes 23 are located flush with the upper edge of the module 9 without protruding . These characteristics of the traverse 20 provide good conditions for the stability of the module 9 when it is lifted, while the support 8 cannot interfere with the fixing of the module 9 in its seat.

The design feature of the CCGT steam boiler is that its modules 9 are located inside the frame b in several horizontal rows, three in a row, as shown by dashed lines in FIG. 1. In this case, the modules 9 are placed in each row close to each other so that the cables of the lifting devices 1 cannot be passed between them.

The design of the support 8 provides the installation sequence of the steam boiler, in which the modules are installed on their seats one at a time, starting from the top row, for this the length of the beams 19, which determines the size of the support 8 in the direction transverse to the traverse 20, is selected to exceed the length of the horizontal row of modules, but less than the distance between the side walls 7 of the frame 6 so that the cables 3 of the lifting devices 1 extend along the walls 7 inside the frame 6, as shown in FIG. 1. Thus, in the present example of the implementation of the device, the support 8 stands for the overall dimensions of the module 9 mounted on it in the transverse direction.

Installation of a steam boiler CCGT is as follows. On the frame b (Fig. 1) of the CCGT steam boiler, upon completion of its assembly, rail 2 is mounted, for which transverse beams 5 are temporarily mounted on top of frame b and rail beams 4 are fixed on them. At the opposite ends of rail 2, lifting devices are installed 1 so that the cables 3 pass inside the frame b at a distance from each other, equal to the distance between the eyes 23 of the support 8. The installation of the rail 2 and the installation of lifting devices 1 can be performed, for example, using a conventional truck crane with an arrow sufficient Noah length. Rise of these

elements of the device on the frame 6 does not present a technical problem due to their low weight. After installing the lifting devices 1 on the track 2, the device is ready for mounting modules 9 of the steam boiler.

The first of the mounted modules 9 is fed inside the frame b on the vehicle 10 so that it occupies its original position directly vertically under its seat and marking the module 9, marking the places with which it will rest on the beams 19 of the support 8.

FIG. 5 illustrates the preparation for lifting the module 9. Under the module 9, mount the support 8. For mounting the support 8, the device may contain special goats 24. The rolls 19 are mounted on the goats 24 on the side of the module 9 and are advanced or, for example, pulled through an auxiliary winch through a free winch the gap between the frame of the vehicle 10 and the module 9 mounted on it so that the ends of the beams 19 are on opposite sides of the module 9. The traverses 20 for the eyes 23 (Fig. 3) are hung on the hooks 18 of the lifting devices 1 and bring them to the ends b 19. Next, a lock support assembly 8, connecting the ends of the beams 19 with the ends of beams 22 traverse 20. The assembled bearing 8 is lifted slightly lifting devices 1 so that it is hanging freely under the module 9 by means of wires 3, which in this case take a vertical position. By moving the vehicle 10 in the direction across the horizontal rows of the module seats, the position of the module 9 is achieved, in which the position of the beams 19 of the support 8 coincides with the markings on the module 9 and the support 8 is raised until it contacts the module 9, simultaneously

finally correcting the position of the support 8 relative to the module, its deviation in the desired direction. Then the module 9 is lifted from the vehicle 10 to the seat. Correction of the position of the module 9 in the direction along the horizontal row of module seats is performed, with the module 9 raised, by moving the lifting devices 1 along the rail 2. After that, the first of the mounted modules 9 is fixed on its seat suspended from the upper beams of the frame 6. Installation of the next module 9 is performed in the same sequence as the first, with the only difference being that module 9 on the vehicle 10 is set relative to the starting position with a slight offset along Horizontal row (along the track 2) away from the already established the adjoining unit 9 and then raised into position. The raised mounted module 9 is brought to the already installed module by moving the lifting devices 1 along the rail 2 and fixed on the seat. The last module of the upper row is also raised in an offset position as the second. The lower rows of the CCGT steam boiler modules are mounted alternately from top to bottom, each in the same order as the upper row.

The installation of the CCGT steam boiler modules can be performed in another sequence, in particular, the assembly sequence described above with respect to hydraulic lifts can be used, in which the upper module is gradually lifted as the modules forming a vertical row are fastened to it from below. This installation sequence requires

the use of lifting devices with a lifting capacity many times greater than the weight of one module.

As applied to the installation of steam boilers of CCGT, various modifications of the device that are obvious to the specialist are possible that do not go beyond the scope of this technical solution, which is determined by the attached formula of the utility model. In particular, the device may contain its own track for each of the two lifting devices. In this case, the support for the module is performed protruding beyond its dimensions from the ends, and the rail tracks are installed on the frame of the steam boiler longitudinally to horizontal rows from opposite ends of the module seats.

Claims (6)

1. A device for lifting equipment mounted inside the frame of a technical object, comprising at least one lifting device including a cable, configured to be mounted on the frame from above and capable of lifting a load attached to the cable vertically below it, characterized in that it contains at least at least two lifting devices, while it is made with the possibility of horizontal movement of the lifting devices in the process of lifting the load.  2. The device according to claim 1, characterized in that it further comprises a rigid support for the equipment to be lifted, which substantially stands for the overall dimensions of the equipment in at least one horizontal dimension, while the support is made to be lifted together by all lifting devices.  3. The device according to claim 1 or 2, characterized in that it contains two lifting devices, each of which contains a winch and a trolley carrying it, the device also contains at least one rail track that can be mounted on the frame for moving the trolley at least one lifting device in the process of lifting the load.  4. The device according to claim 3, characterized in that for mounting modules of the steam boiler of the combined cycle gas turbine power plant, the seats of which are located inside the frame of the steam boiler, horizontal rows arranged one above the other, the device contains one rail track common to lifting devices, made with the possibility of fixing on the frame of the steam boiler above the rows of seats of the modules, longitudinally to the rows, while the rail track allows you to install lifting devices at a distance from each other, p overshooting the length of the row of module seats so that their cables, being lowered down, extend outside the opposite ends of the rows of module seats.  5. The device according to claim 4, characterized in that the support contains two identical, made of rigid rods in the form of isosceles triangles of the beam, each of which is adapted for connection at the top of the triangle with the cable of the lifting device, the support also contains two transverse beams made with the possibility of bringing the bottom under the module mounted on the vehicle, the length of the transverse beams exceeds the length of the row of seats of the modules, while the rods traverse lying in the base of the triangles and along erechnye beams are made connectable to each other the ends so as to form a rectangular frame for supporting the lifted module resting on transverse beams. 6. The device according to claim 5, characterized in that the distance between the transverse beams of the support is at least half the length of the module.