CN113137060A

CN113137060A - Water tank hoisting device of water tower and construction method thereof

Info

Publication number: CN113137060A
Application number: CN202110444468.XA
Authority: CN
Inventors: 叶志钢
Original assignee: Wuhan Jingye Zhongcheng Construction Co ltd
Current assignee: Wuhan Jingye Zhongcheng Construction Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-07-20
Anticipated expiration: 2041-04-23
Also published as: CN113137060B

Abstract

The invention discloses a water tank hoisting device of a water tower, which comprises a support cylinder and a water tank, wherein a stabilizing device is arranged between the support cylinder and the water tank, the stabilizing device comprises an inner steel ring, an outer steel ring and an annular plate, the inner wall of the inner steel ring is tightly propped against the outer wall of the support cylinder, the outer steel ring is arranged on the water tank, the annular plate is arranged between the outer wall of the inner steel ring and the inner wall of the outer steel ring, and a steel strand is connected with the annular plate; the construction method of the water tower comprises the steps of installing a stabilizing device and manufacturing a lifting device; the invention has the beneficial effects that: the hoisting device is provided with the stabilizing device, the stabilizing device can effectively avoid the possibility that the water tank and the support cylinder are damaged due to collision in the hoisting process, so that the engineering quality is influenced and potential safety hazards are caused.

Description

Water tank hoisting device of water tower and construction method thereof

Technical Field

The invention belongs to the field of construction facilities and methods of water towers, and particularly relates to a water tank hoisting device of a water tower and a construction method thereof.

Background

The water tower is a high-rise structure for storing water and distributing water, used for keeping and regulating the water quantity and water pressure in a water supply pipe network, mainly comprising a water tank and a support or a bracket for connecting the water tank and the support. And (4) sliding and lifting the template after each layer of concrete is poured until the pouring of the structure is finished.

In the existing construction method, after the slip form construction of a support cylinder is completed, a slip form device is usually removed, then a water tank is cast on the outer side of the support cylinder, and after the water tank is cast and placed for a period of time, the water tank is hoisted along the support cylinder by a crane or a pulley block hoisting device arranged at the top of a straight-through passage; in the existing water tank hoisting mode, shaking can be caused in the hoisting process, so that the water tank is rubbed and collided with the support cylinder in the hoisting process, the water tank and the support cylinder are easily damaged, the engineering quality is influenced, and potential safety hazards exist; meanwhile, if the sliding mode device needs to be disassembled when the hoisting devices such as the pulley hoisting set and the like are installed at the top of the supporting cylinder, the time for disassembling the sliding mode device and installing the hoisting device also needs to be set, and a large amount of construction period and waste of human resources can be caused.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a water tank hoisting device of a water tower and a construction method thereof.

The technical scheme adopted by the invention is as follows:

a water tank hoisting device of a water tower comprises a hoisting device and a stabilizing device, wherein the hoisting device and the stabilizing device are connected through a plurality of steel strands; the water tank is arranged at the top of the support cylinder through a hoisting device, the lifting device is arranged at the top of the support cylinder, and the stabilizing device is arranged between the support cylinder and the water tank;

the stabilizing device comprises an inner steel ring, an outer steel ring and an annular plate, the inner wall of the inner steel ring supports against the outer wall of the supporting cylinder, the outer steel ring is installed on the water tank, the annular plate is arranged between the outer wall of the inner steel ring and the inner wall of the outer steel ring, and the steel strand is connected with the annular plate.

Furthermore, a plurality of first vertical supports are further arranged between the outer wall of the inner steel ring and the inner wall of the outer steel ring and are uniformly distributed at the bottom of the annular plate.

Further, a filling layer is arranged between the inner steel ring and the outer wall of the support cylinder.

Furthermore, a force guide plate is arranged on the upper shell of the water tank, and one end of the force guide plate is arranged on the annular plate.

Furthermore, the shape of the force guide plate is matched with that of the upper shell, and a second vertical support is arranged between the annular plate and the force guide plate.

Furthermore, a plurality of first hoisting holes are formed in the annular plate, and the steel strand penetrates through the first hoisting holes.

Further, hoisting device includes lower steel ring, well steel ring and the last steel ring that from the bottom up set gradually, and lower steel ring is installed at a section of thick bamboo top, is provided with the bracket support down between steel ring and the well steel ring, is connected through hydraulic lifting system between well steel ring and the last steel ring.

Furthermore, a plurality of second hoisting holes are formed in the middle steel ring, a plurality of third hoisting holes are formed in the upper steel ring, the second hoisting holes and the third hoisting holes are coaxially arranged, and the steel strands sequentially penetrate through the third hoisting holes and the second hoisting holes.

Furthermore, a plurality of first hoisting holes and second hoisting holes are coaxially arranged, the steel strand sequentially passes through the third hoisting hole, the second hoisting hole and the first hoisting hole, and the lower end of the steel strand is connected to the annular plate.

Further, the construction method comprising the water tank hoisting device comprises the following steps:

a) the foundation construction comprises the following steps: measuring and positioning, leveling a field, measuring and lofting, excavating earth and stone, treating a substrate, testing a groove of a foundation and pouring a cushion layer;

b) assembling a slip form device, wherein the slip form device comprises a template, a surrounding ring, a lifting frame, an operating platform, a supporting rod and a hydraulic lifting system;

c) constructing the supporting cylinder main body, namely constructing the supporting cylinder main body through a slip form device to reach the design height;

d) on-spot prefabrication of water tank and maintenance and the installation of securing device, the on-spot prefabrication of water tank includes with the maintenance: installing a template scaffold of the water tank, installing an outer template of the shell, binding reinforcing steel bars, sequentially combining inner concrete pouring, curing concrete, dismantling the template and decorating the outer surface of the water tank; after the water tank is formed, placing for a period of time, installing a stabilizing device on the inner side of the water tank, firstly installing an outer steel ring along the inner side wall of a middle ring beam of the water tank, then installing a force guide plate along an upper shell of the water tank, then installing an annular plate at a designed position, then installing a first vertical support and a second vertical support, and finally installing an inner steel ring;

e) the slipform device is demolishd and hoisting device preparation, and the slipform device is demolishd and is included: removing the template, the enclosure and the supporting rod; the manufacturing of the lifting device comprises the following steps: installing a lower steel ring on the operating platform, using an upper support and a lower support of the lifting frame as an upper steel ring and a middle steel ring respectively, installing a bracket support between the lower steel ring and the middle steel ring, and then enabling the steel strand to pass through a hydraulic lifting system;

f) lifting and mounting the water tank, namely mounting the steel strand on the annular plate, lifting the water tank to a designed position through a lifting device, then pouring a ring joist, and mounting the lower shell of the water tank on the ring joist;

g) the engineering is ended, and the engineering end includes: the pipeline electrical installation and the test of water tank, the construction of dormer top cap, door and window construction, decoration construction and anticorrosive construction, hoisting device and securing device demolish, finish and deal with and check and accept.

The invention has the beneficial effects that:

the invention provides a water tank hoisting device of a water tower and a construction method of the water tower.

Drawings

FIG. 1 is a schematic view of the installation of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the water tank and the stabilizer;

FIG. 3 is a schematic view of a view of the stabilizer;

FIG. 4 is a schematic structural view of another view of the stabilization device;

in the figure: 1-supporting cylinder, 2-water tank, 21-lower shell, 22-middle ring beam, 23-upper shell, 3-lifting device, 31-lower steel ring, 32-bracket support, 33-middle steel ring, 34-hydraulic lifting system, 35-upper steel ring, 4-stabilizing device, 41-first vertical support, 42-annular plate, 421-first hoisting hole, 43-guide plate, 44-second vertical support, 45-inner steel ring, 46-outer steel ring, 5-steel strand and 6-filling layer.

Detailed Description

The first embodiment is as follows:

in this embodiment, as shown in fig. 1, a water tank hoisting device for a water tower comprises a supporting cylinder 1 and a water tank 2, wherein the supporting cylinder 1 is manufactured by a slip form construction method, the water tank 2 is installed at the top of the supporting cylinder 1 through the hoisting device, the hoisting device comprises a hoisting device 3 and a stabilizing device 4, the hoisting device 3 is connected with the stabilizing device 4 through a plurality of steel strands 5, the hoisting device 3 is installed at the top of the supporting cylinder 1, and the stabilizing device 4 is installed between the supporting cylinder 1 and the water tank 2;

in this embodiment, as shown in fig. 1 to 4, the securing device 4 includes an inner steel ring 45, an outer steel ring 46 and an annular plate 42, the inner wall of the inner steel ring 45 tightly supports the outer wall of the support tube 1, the outer steel ring 46 is installed on the water tank 2, the annular plate 42 is disposed between the outer wall of the inner steel ring 45 and the inner wall of the outer steel ring 46, the plurality of steel strands 5 are connected to the annular plate 42, and the whole water tank 2 is lifted by driving the annular plate 42, specifically, the inner steel ring 45 surrounds the outer wall of the support tube 1, the diameter of the inner steel ring 45 is smaller than the upper and lower outlets of the tank 2, the outer steel ring 46 is installed inside the water tank 2, the annular plate 42 connects the inner steel ring 45 and the outer steel ring 46 and plays a buffering role, when the hoisting process shakes, the inner steel ring 45 first contacts with the support tube 1, the collision force is transmitted to the annular plate 42 through the inner steel ring 45, and then the annular plate 42 is partially deformed to unload the impact force, meanwhile, the annular plate 42 is connected with the outer steel ring 46, and the outer steel ring 46 transmits the impact force to the water tank 2 synchronously, so that the impact force at a certain point is dispersed to be born at most, and the phenomenon that the branch cylinder 1 and the water tank 2 are damaged due to stress concentration can be effectively avoided.

In this embodiment, the lifting device 3 is provided with 12 steel strands according to the design requirements and relevant standards of this embodiment.

Example two:

in this embodiment, as shown in fig. 1 to 4, in the embodiment, a first vertical support 42 is added on the basis of the first embodiment, a plurality of first vertical supports 41 are further disposed between the outer wall of the inner steel ring 45 and the inner wall of the outer steel ring 46, the plurality of first vertical supports 41 are uniformly distributed at the bottom of the annular plate 42, the first vertical supports 42 are used for reinforcing the connection between the inner steel ring 45, the outer steel ring 46 and the annular plate 42, and meanwhile, when the annular plate 42 is lifted by the steel strand 5, the annular plate 42 is reinforced, so that the annular plate 42 is prevented from being damaged by pulling in the process of lifting the water tank 2 again due to insufficient rigidity.

Example three:

in this embodiment, as shown in fig. 1, in the second embodiment, a filling layer 6 is added on the basis of the second embodiment, the filling layer 6 is disposed between the inner steel ring 45 and the branch cylinder 1, and the filling layer 6 is mounted on the inner steel ring 45 for further buffering the impact force and avoiding the direct contact friction between the inner steel ring 45 and the branch cylinder 1, and the surface of the branch cylinder 1 is damaged by the contact, so that the filling layer 6 should be made of a material having a lower strength, hardness and rigidity than the materials of the branch cylinder 1 and the inner steel ring 45 and having a stronger wear resistance, specifically, the branch cylinder 1 is concrete, the inner steel ring 45 is Q235-B material, and preferably, the filling layer 6 is made of polytetrafluoroethylene.

Example four:

in the present embodiment, as shown in fig. 1 to 4, a force guide plate 43 is added to the second embodiment, the force guide plate 43 is mounted on the upper housing 23 of the water tank 2, one end of the force guide plate 43 is mounted on the annular plate 42, and the force guide plate 43 is used for further dispersing the collision force at multiple positions.

Example five:

in this embodiment, as shown in fig. 1 to 4, the present embodiment is a further supplement to the fourth embodiment, the shape of the force guide plate 43 is matched with the upper housing 23, the force guide plate 43 and the upper housing 23 should be attached as much as possible to prevent stress concentration, a second vertical support 44 is disposed between the annular plate 42 and the force guide plate 43, and the second vertical support 44 makes the installation of the force guide plate 43 more stable.

Example six:

in this embodiment, as shown in fig. 1 to 4, which is a further supplement to the first embodiment, the annular plate 42 is provided with a plurality of first hoisting holes 421, the steel strand 5 passes through the first hoisting holes 421, the other end of the steel strand 5 should be connected to a baffle (not shown in the figure) that cannot pass through the hoisting holes 421, and specifically, the annular plate 42 is provided with 12 first hoisting holes 421.

Example seven:

in this embodiment, as shown in fig. 1, this embodiment is a further supplement to the first embodiment, the lifting device 3 sequentially includes, from bottom to top, a lower steel ring 31, a middle steel ring 33 and an upper steel ring 35, the lower steel ring 31 is installed on the top of the support tube 1, a bracket 32 is disposed between the lower steel ring 31 and the middle steel ring 33, the middle steel ring 33 and the upper steel ring 35 are connected by a hydraulic lifting system 34, specifically, the upper steel ring 35, the middle steel ring 33, the lower steel ring 31 and the bracket 32 are made of Q235-B, and are manufactured strictly according to the construction scheme and design requirements, 12 jacks are uniformly disposed between the middle steel ring 33 and the upper steel ring 35, the hydraulic lifting system 34 is internally installed with steel strands 5, according to the design requirements and related standards of this embodiment, the hydraulic lifting system 34 is a 100t hydraulic jack, and a hydraulic control console (not shown in the figure) is further provided in this embodiment, the hydraulic control platform is used for controlling a plurality of hydraulic jacks to act or stop simultaneously, and the water tank 2 is prevented from inclining in the hoisting process.

Example eight:

in this embodiment, as shown in fig. 1, this embodiment is a further supplement to embodiment seven, a plurality of second hoisting holes are provided on the middle steel ring 33, a plurality of third hoisting holes are provided on the upper steel ring 35, the plurality of second hoisting holes and the third hoisting holes are coaxially arranged, anchor clips are installed in the second hoisting holes and the third hoisting holes, the steel strand 5 sequentially passes through the third hoisting holes and the second hoisting holes, specifically, 12 second hoisting holes are provided on the middle steel ring 33, and 12 third hoisting holes are provided on the upper steel ring 35.

Example nine:

in this embodiment, as shown in fig. 1, this embodiment is a further supplement to embodiment eight, where a plurality of first hoisting holes 421 and second hoisting holes are coaxially disposed, the steel strand 5 sequentially passes through the third hoisting hole, the second hoisting hole and the first hoisting hole 421, and the lower end of the steel strand 5 is connected to the annular plate 42, specifically, the installation process of the steel strand 5 includes locking the anchor clamping piece on the annular plate 42, striking the anchor clamping piece with a hammer to make the end flat, and pressing the clamping piece with a limiting plate. Tensioning the steel strands 5 by using 1t of pretightening force through a 20t of penetrating type jack on the upper steel ring 35, clamping the steel strands on the anchor of the middle steel ring 33 one by one, pre-threading the steel strands 5 symmetrically according to the group, pulling the steel strands by hand to determine whether the stress is uniform or not, pre-tightening the steel strands again if the stress is not uniform, and after the pre-tightening operation is finished, well clamping the upper steel ring 35 on the anchor, clamping the steel strands, and adjusting all the anchors to form the limiting plates.

So far, the working mode of the water tank hoisting device of the water tower provided by the invention is as follows: jacking by 12 100t hydraulic jacks to act between the upper steel ring and the middle steel ring, enabling the upper steel ring beam and the lower steel ring beam to act alternately through retraction and jacking of the jacks, driving the water tank to ascend gradually by an anchorage device and steel strands, and calculating the ascending distance according to actual conditions when the water tank ascends for a certain distance each time.

Example ten:

the embodiment describes a construction method of a water tower to which the water tank hoisting device of the water tower is applied, and comprises the following steps:

a construction method of a water tower comprises the following steps:

a) the method comprises the following steps The foundation construction comprises the following steps: measuring and positioning, leveling a field, measuring and lofting, excavating earth and stone, treating a substrate, testing a groove of a foundation and pouring a cushion layer;

specifically, measurement positioning: the project is an independent circular structure, the position is not closely related to other projects, so the construction measurement control is relatively simple, 2 plane control points can be arranged in an encrypted manner near a construction site and also used as reconciliation control points according to measurement control network information provided by an owner, each control pile is arranged at a position which is not interfered by construction and has good visibility, simultaneously, an obvious mark is made at the periphery, the control points are arranged to be convenient and easy for lofting work, and the measurement precision is required to accord with the regulations of engineering measurement Specifications (GB 50026-93) and design requirements;

leveling the field: firstly, surveying a construction site, finding out the actual condition of a project, leveling the site according to the elevation required by the design, removing all barriers on the ground and underground in a construction area, well performing drainage work of the construction site, and arranging intercepting ditches and drainage ditches around the site to ensure that the site does not accumulate water;

measuring and lofting: two professional pay-off measurers with proficient business are equipped, two auxiliary staff are equipped, the measurement positioning work is specially carried out, and the verticality and detail lofting work are controlled by adopting a J2-1 high-precision theodolite; the main task of construction measurement is to set up the central position of the water tower and the elevation of each subsection; before and after partial project construction such as foundation trench excavation, foundation cushion, foundation bottom plate and the like, laying out the center of the water outlet tower and relevant side lines thereof according to field control points respectively, and timely guiding elevation to a structure at different stages and layer heights of construction; the measurement work needs to be carried out by personnel and instruments, and needs to be careful, tight and quick, so that the construction precision and quality are ensured, and the requirements of on-site continuous operation are met;

excavating earth and stone: according to actual conditions on site, the excavated earthwork is stacked at a site designated place or transported to an off-site designated soil piling field by a dump truck, so as to prevent over excavation and slope stabilization;

substrate treatment: mechanically excavating to reach the elevation close to the bottom of the designed pit, reserving a protective layer with the thickness of more than 300mm, and manually removing the protective layer before paving the cushion layer;

testing a groove on the foundation: making concealed acceptance work of foundations and the like, and removing sundries, accumulated water, silt, floating soil, weeds and the like in the foundation pit;

pouring a cushion layer: and backfilling and tamping the bedding course earthwork in sections and layers, digging the joint portion into a step shape, wherein the step height is 25cm, the width is not less than 100cm, and tamping by using a frog rammer when backfilling the step portion. In the backfilling process, when the rubber soil phenomenon occurs, the tamping work is stopped, the rubber soil is timely dug out, and the rubber soil is replaced by good soil. After each layer of backfilled soil is tamped, sampling and detecting in time, and after the backfilled soil is qualified, backfilling the next layer, wherein the compactness is more than 0.94, and then pouring according to a design file.

b) The method comprises the following steps Assembling a slip form device, wherein the slip form device comprises a template, a surrounding ring, a lifting frame, an operating platform, a supporting rod and a hydraulic lifting system;

assembling a template: the independent foundation is formed by splicing and nailing four side plates in principle, two side plates are equal to corresponding structural sizes, and the other two side plates are 150-200 mm longer than the designed side and are the same in height. The periphery of the square frame is spliced by wood plates, and the periphery of the square frame is firmly fixed by inclined struts and flat struts;

a hoisting frame: the lifting frame is in an open shape, and the beam is a channel steel with the length of 1m and the money of 12 cm;

support bar and hydraulic lifting system: the supporting rods are steel pipes with the diameter of 48.3 multiplied by 3.5mm, the supporting rods penetrate into the hydraulic lifting system 34, the supporting rods are welded between two channel steels, the notches of the channel steels face the steel pipes, the hydraulic lifting system 34 adopts 12 hydraulic jacks, each jack works and lifts by 60kN, and the hydraulic jacks fall on the cross beam;

operating the platform and the enclosure: operation platform divide into interior operation platform and outer operation platform, and interior operation platform's crossbeam adopts wide 14 cm's channel-section steel, and the vertical and horizontal interval of crossbeam is 0.6m, links to each other with the channel-section steel enclosure that the hoisting frame passes through wide 12, and the enclosure sets up along the hoop logical length, and the angle steel bearing of every length 0.42m75 degree angle holds in the palm the enclosure. A5 cm-thick wood springboard is fully paved on the platform, the cross beam of the outer operating platform adopts 12 channel steel with each length of 2.5m, and the cross beam is welded on the lifting frame upright post. The width of the external operating platform is 1.5m, and the end of the beam is stretched and hung with a dense mesh type safety net which is connected with the bottom of the lower hanging ladder. The dense mesh type safety net is arranged along the circumferential through length to prevent sundries from falling to the ground, the elevation of an internal and external operation platform is flush with the elevation of the top of the steel formwork, angle steel with the length of 1.5m and the angle of 75 degrees is welded between the cross beam and the vertical column of the lifting frame to be used as an inclined strut,

c) the method comprises the following steps Constructing a main body of the support cylinder 1, and constructing the main body of the support cylinder 1 to reach a design height through a slip form device; the slip form construction comprises three stages of initial lifting, normal sliding lifting and final lifting. After the normal sliding is carried out, if the sliding is required to be suspended (such as water cut, power cut or wind power reaching six levels), sliding stopping measures are required; before slip form construction, the following slip form equipment is overhauled;

initial rising: before the template slides up, concrete with the height of 60cm is poured on the bottom layer, and the template slides after the stopping time is 3-5 hours until the strength of the concrete at the bottom reaches 0.3-0.4 MPa required by the specification;

normal sliding: the normal slip form mainly comprises steel bar binding, concrete warehousing and slip form lifting, wherein the height of each slip form is about 30cm, the slip form lifting is carried out after the steel bar binding and before the concrete pouring according to the working procedures, and the transition platform of the tower body and the inlet hole and the lower cylinder body are continuously constructed.

Final liter: and (3) sliding to a position close to the top (elevation), measuring the elevation of the concrete and making a corresponding mark, accelerating the pouring speed as much as possible when the last layer of concrete is poured, leveling the concrete in the mold in time, lifting the template by 30cm after the last layer of concrete is poured, and vibrating the template once in a support cylinder to ensure the width of the section.

d) 2 on-spot prefabrications of water tank and maintenance and the installation of securing

device

4, 2 on-spot prefabrications of water tank include with the maintenance: installing a template scaffold of the water tank 2, installing an outer template of the shell, binding reinforcing steel bars, sequentially combining inner concrete, curing concrete, dismantling the template and decorating the outer surface of the water tank; after the water tank 2 is formed, the water tank is placed for a period of time, the stabilizing device 4 is installed on the inner side of the water tank 2, an outer steel ring 46 is installed along the inner side wall of the middle ring beam 22 of the water tank 2, then a force guide plate 43 is installed along the upper shell 23 of the water tank 2, then an annular plate 42 is installed at a designed position, then a first vertical support 41 and a second vertical support 44 are installed, and finally an inner steel ring 45 is installed;

e) the method comprises the following steps The slipform apparatus is dismantled and the hoisting device 3 is made, and the slipform apparatus is dismantled and includes: removing the template, the enclosure and the supporting rod; the manufacturing of the lifting device 3 comprises the following steps: installing a lower steel ring 31 on the operating platform, using an upper bracket and a lower bracket of the lifting frame as an upper steel ring 35 and a middle steel ring 33 respectively, installing a bracket support 32 between the lower steel ring 31 and the middle steel ring 33, and then passing the steel strand 5 through a hydraulic lifting system 34;

f) the method comprises the following steps Lifting and mounting the water tank 2, mounting the steel strand 5 on the annular plate 42, lifting the water tank 2 to a designed position through the lifting device 3, then pouring a ring joist, and mounting the lower shell 21 of the water tank 2 on the ring joist;

g) the method comprises the following steps The engineering is ended, and the engineering end includes: the pipeline electrical installation and test of the water tank 2, the construction of the top cover of the clerestory, the door and window, the decoration, the anticorrosion construction, the removal of the lifting device and the stabilizing device, the finishing and the delivery inspection and acceptance, and the project finishing is carried out according to the relevant standard, which is not repeated herein.

The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.

Claims

1. A water tank hoisting device of a water tower is characterized by comprising a hoisting device (3) and a stabilizing device (4), wherein the hoisting device (3) is connected with the stabilizing device (4) through a plurality of steel strands (5); the water tank is characterized by further comprising a supporting cylinder (1) and a water tank (2), wherein the water tank (2) is mounted at the top of the supporting cylinder (1) through the hoisting device, the lifting device (3) is mounted at the top of the supporting cylinder (1), and the stabilizing device (4) is mounted between the supporting cylinder (1) and the water tank (2);

the stabilizing device (4) comprises an inner steel ring (45), an outer steel ring (46) and an annular plate (42), the inner wall of the inner steel ring (45) is tightly abutted to the outer wall of the support cylinder (1), the outer steel ring (46) is installed on the water tank (2), the annular plate (42) is arranged between the outer wall of the inner steel ring (45) and the inner wall of the outer steel ring (46), and the steel strand (5) is connected with the annular plate (42).

2. The water tank lifting device of a water tower as claimed in claim 1, wherein a plurality of first vertical supports (41) are further provided between the outer wall of the inner steel ring (45) and the inner wall of the outer steel ring (46), and a plurality of first vertical supports (41) are uniformly distributed at the bottom of the annular plate (42).

3. The water tank lifting device of a water tower as claimed in claim 1, wherein a filling layer (6) is arranged between the inner steel ring (45) and the outer wall of the branch pipe (1).

4. The water tank lifting device of a water tower as claimed in claim 1, wherein a force guide plate (43) is installed on the upper shell (23) of the water tank (2), and one end of the force guide plate (43) is installed on the annular plate (42).

5. The water tank lifting device of a water tower according to claim 4, characterized in that the force guide plate (43) is shaped to match the upper housing (23), and a second vertical support (44) is arranged between the annular plate (42) and the force guide plate (43).

6. The water tank lifting device of the water tower as claimed in claim 5, wherein a plurality of first lifting holes (421) are formed in the annular plate (42), and the steel strand (5) passes through the first lifting holes (421).

7. The water tank hoisting device of the water tower according to claim 6, wherein the lifting device (3) comprises a lower steel ring (31), a middle steel ring (33) and an upper steel ring (35) which are sequentially arranged from bottom to top, the lower steel ring (31) is installed on the top of the support tube (1), a bracket support (32) is arranged between the lower steel ring (31) and the middle steel ring (33), and the middle steel ring (33) and the upper steel ring (35) are connected through a hydraulic lifting system (34).

8. The water tank lifting device of a water tower as claimed in claim 7, wherein a plurality of second lifting holes are formed on the middle steel ring (33), a plurality of third lifting holes are formed on the upper steel ring (35), a plurality of second lifting holes and third lifting holes are coaxially arranged, and the steel strand (5) sequentially passes through the third lifting holes and the second lifting holes.

9. The water tank hoisting device of the water tower as claimed in claim 8, wherein the first hoisting holes (421) and the second hoisting holes are coaxially arranged, the steel strand (5) sequentially passes through the third hoisting hole, the second hoisting hole and the first hoisting hole (421), and the lower end of the steel strand (5) is connected to the annular plate (42).

10. A construction method comprising the water tank lifting device of claim 1, characterized by comprising the steps of:

c) constructing a main body of the support cylinder (1), and constructing the main body of the support cylinder (1) to reach a design height through a slip form device;

d) water tank (2) field prefabrication and maintenance and securing device (4) installation, water tank (2) field prefabrication and maintenance include: installing a template scaffold of the water tank (2), installing a shell outer template, binding reinforcing steel bars, sequentially combining inner concrete pouring, curing concrete, dismantling the template and decorating the outer surface of the water tank; after the water tank (2) is molded, the water tank is placed for a period of time, the stabilizing device (4) is installed on the inner side of the water tank (2), the outer steel ring (46) is installed along the inner side wall of the middle ring beam (22) of the water tank (2), then the force guide plate (43) is installed along the upper shell (23) of the water tank (2), then the annular plate (42) is installed at a designed position, then the first vertical support (41) and the second vertical support (44) are installed, and finally the inner steel ring (45) is installed;

e) the slipform device is dismantled and hoisting device (3) is made, and the slipform device is dismantled and includes: removing the template, the enclosure and the supporting rod; the manufacturing of the lifting device (3) comprises the following steps: installing a lower steel ring (31) on the operation platform, wherein the upper support and the lower support of the lifting frame are respectively used as an upper steel ring (35) and a middle steel ring (33), installing a bracket support (32) between the lower steel ring (31) and the middle steel ring (33), and then passing the steel strand (5) through a hydraulic lifting system (34);

f) lifting and installing the water tank (2), installing the steel strand (5) on the annular plate (42), lifting the water tank (2) to a design position through the lifting device (3), then pouring a ring joist, and installing a lower shell (21) of the water tank (2) on the ring joist;

g) the engineering is ended, and the engineering end includes: the pipeline electrical installation and the test of water tank (2), the construction of clerestory top cover, the door and window construction, decoration construction and anticorrosive construction, hoisting device and securing device demolish, finish and deal with and accept.