CN108506568B - Traction device and traction method for hoisting pipeline in vertical shaft - Google Patents
Traction device and traction method for hoisting pipeline in vertical shaft Download PDFInfo
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- CN108506568B CN108506568B CN201810681199.7A CN201810681199A CN108506568B CN 108506568 B CN108506568 B CN 108506568B CN 201810681199 A CN201810681199 A CN 201810681199A CN 108506568 B CN108506568 B CN 108506568B
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- pipeline
- steel cable
- crane
- butt joint
- fixed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C25/00—Cranes not provided for in groups B66C17/00 - B66C23/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/09—Accessories therefor, e.g. anchors for bringing two tubular members closer to each other
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supports For Pipes And Cables (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a traction device for hoisting a pipeline in a vertical shaft, which comprises a butt joint support, a winch, a steel cable limiting piece, a limiting slide block and a crane, wherein the butt joint support is connected with the winch through a connecting piece; the butt joint support is used for being fixed on the top stepping platform and is provided with a fixed pulley; a steel cable of the winch bypasses the fixed pulley, and the free end of the steel cable extends into the bottom of the vertical shaft and is hung with a tensioning counterweight; the steel cable limiting piece is fixed on the inner wall of the vertical shaft or the platform in the vertical shaft and is also connected with the steel cable to limit the steel cable to shake along the horizontal direction; the limiting slide block is used for being fixed on a pipeline to be hoisted, can be detachably clamped on the steel cable and can slide up and down along the steel cable; the crane is used to hoist and transport the pipe down the wireline to an installation location within the shaft. The traction device utilizes the steel cable limiting piece to limit the steel cable to shake along the horizontal direction, so that the steel cable is used as a guide rail to guide a pipeline to be conveyed to the lower part of the vertical shaft, the workload can be reduced, and the construction difficulty can be reduced. The invention provides a traction method which is applied to the traction device.
Description
Technical Field
The invention relates to the technical field of mechanical industry, in particular to a traction device for hoisting a pipeline in a vertical shaft and a traction method for hoisting the pipeline in the vertical shaft.
Background
In large hydropower stations and nuclear power projects, pipeline equipment is often installed in a vertical shaft, particularly in a high-fall vertical shaft, pipeline bus sections with the length of about 12 meters and the diameter of about 400-800 mm are sequentially and vertically hung into the vertical shaft in a vertical shaft with the fall of hundreds of meters and the diameter of about 10m, are butted end to end, are fixed through a well wall, are connected out of the well from the bottom of the well, and are electrically connected with underground equipment and underground equipment.
In the prior art, when a pipeline is hoisted, a rigid guide rail, such as an H-shaped steel guide rail, needs to be installed at a specific position of a shaft wall from top to bottom, a pre-installation support is established on a step platform at the top of the shaft and used for completing pre-butt installation of 2-3 sections of pipelines, the pre-installation section is hoisted by a top bridge crane and translated to the rigid guide rail, two ends of the pre-installation support are buckled on the rigid guide rail by sliders, when the bridge crane is slowly released downwards, the pipeline slides downwards along the rigid guide rail through the limiting sliders, when the installation height layer is reached, the limiting sliders are detached from the rigid guide rail, and the top bridge crane translates to move the pipeline to a butt.
However, in the mode, a vertical rigid guide rail needs to be installed in the vertical shaft, so that the workload is large and the construction difficulty is high.
In addition, the installation of the rigid guide rail needs to consume more materials and increase the cost. Moreover, in order to take into account the later maintenance of the pipeline equipment, the rigid guide rail needs to be permanently reserved, so that a descending channel where the rigid guide rail is located cannot be reused, and the space in the well is wasted; meanwhile, the top bridge crane needs to hoist pipelines to be translated to each installation position in the well from the rigid guide rail, so that each platform in the well cannot be directly built to the pipeline installation position, only the pipelines are hoisted in place and then the temporary operation platform is built to the installation position, equipment installation and temporary platform building are conducted alternately, and the installation quality and progress of pipeline equipment are not guaranteed; in consideration of future maintenance, the platform in each well cannot occupy the translation channel, and the utilization of the space in the well is limited; because platform and piping installation are separated above-mentioned translation passageway in the well, cause the inspection personnel can not be close piping installation, also do not be favorable to operation maintenance and maintenance in the future.
In conclusion, how to avoid installing a vertical rigid guide rail when hoisting a pipeline in a vertical shaft, reduce the workload and reduce the construction difficulty is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a traction device for hoisting a pipeline in a shaft, which utilizes a steel cable to guide the hoisted pipeline to be conveyed downwards to the shaft, avoids mounting a vertical rigid guide rail on the inner wall of the shaft, and has the advantages of less workload and low construction difficulty. The invention also provides a traction method for hoisting the pipeline in the shaft, which is applied to the traction device and has the effects of less workload and low construction difficulty.
In order to achieve the purpose, the invention provides the following technical scheme:
a traction apparatus for hoisting a pipeline in a shaft, comprising:
the butt joint support is used for being fixed on a top step table of the vertical shaft, and a fixed pulley is arranged on the butt joint support;
the steel cable of the winch bypasses the fixed pulley, and the free end of the steel cable extends into the bottom of the vertical shaft and is hung with a tensioning counterweight;
the steel cable limiting piece is fixed on the inner wall of the vertical shaft or the inner platform of the vertical shaft and is connected with the steel cable so as to limit the steel cable to shake in the horizontal direction;
the limiting sliding block is used for being fixed on a pipeline to be hoisted; the limiting slide block is detachably clamped on the steel cable and can slide up and down along the steel cable;
a crane for hoisting a pipe and transporting the pipe down the cable to an installation location within the shaft.
Preferably, in the above traction apparatus, the docking bracket is used for providing an operating platform for pre-docking installation to a plurality of sections of pipelines to be hoisted, and the docking bracket includes:
the fixed pulley can be arranged on the bracket body in a rotating mode around the axis of the fixed pulley;
the first supporting plate is fixed on the bracket body;
the second supporting plate is fixed on the bracket body;
wherein a fixed position of at least one of the first support plate and the second support plate on the stent body is adjustable; when a plurality of sections of pipelines to be hoisted are installed in a butt joint mode, the first supporting plate and/or the second supporting plate are/is located at a first fixed position, and the two supporting plates support flanges at the end portions of the pipelines; after the flange butt joint installation of two pipelines is accomplished, first backup pad and/or the second backup pad is in second fixed position, and the clearance between two backup pads increases, makes the pipeline of butt joint installation pass through first backup pad with clearance between the second backup pad is carried downwards.
Preferably, in the above traction device, the wire rope limiter comprises
The fixing support is used for being fixed on the inner wall of the vertical shaft or an inner platform of the vertical shaft;
the mounting plate is fixed on the fixed support;
and the clamping ring is arranged on the periphery of the steel cable and is detachably fixed on the mounting plate.
Preferably, in the above traction apparatus, the restricting slider includes:
the pipeline connecting support is used for being fixedly connected with the pipeline to be hoisted;
and the mounting block is fixed on the pipeline connecting support and forms a steel cable clamping groove together with the pipeline connecting support.
Preferably, in the above traction apparatus, the limiting slider further includes a shifting block disposed on the pipe connecting bracket; the shifting block is provided with a closing state and an opening state, and in the closing state, the shifting block blocks the opening of the steel cable clamping groove to prevent the steel cable from falling off from the opening of the steel cable clamping groove; in the opening state, the shifting block is separated from the opening of the steel cable clamping groove, so that the mounting plate passes through the steel cable clamping groove when the limiting slider slides downwards along the steel cable and reaches the mounting plate.
Preferably, in the traction device, the limiting slider further includes an elastic member, and the elastic member is connected to the shifting block and the pipeline connecting bracket and drives the shifting block to maintain a closed state; when the limiting sliding block slides downwards along the steel cable and passes through the mounting plate, the mounting plate tightly props against the shifting block and drives the shifting block to overcome the resistance of the elastic piece to move and switch to an opening state.
A traction method for hoisting a pipeline in a vertical shaft is used for the traction device in any one of the technical schemes, and comprises the following steps:
(1) installing a butt joint support, a winch and a steel cable limiting piece;
(2) making the steel cable of the winch pass around the fixed pulley, making the free end of the steel cable extend into the bottom of the vertical shaft, and suspending a tensioning counterweight at the free end of the steel cable to connect the steel cable limiting piece with the steel cable;
(3) enabling a crane to hoist the pipeline, assembling a limiting slide block on the pipeline, hoisting the pipeline to a position close to the steel cable by using the crane, clamping the limiting slide block on the steel cable, and conveying the pipeline downwards to the vertical shaft along the steel cable by using the crane until the pipeline reaches the position for installing the pipeline in the vertical shaft;
(4) and (3) detaching the limiting slide block from the steel cable, translating the pipeline to a butt joint installation position by using a crane, detaching the limiting slide block on the pipeline, assembling the hoisted pipeline and the pipeline in the shaft in a butt joint mode, and fixing the hoisted pipeline on the shaft wall.
Preferably, in the above pulling method, the step (3) includes:
(31) assembling a first limiting sliding block on a flange at one end of a first section of pipeline, and vertically hoisting the pipeline from the other end of the pipeline by using a crane so as to enable the flange assembled with the first limiting sliding block to be positioned at the lower end; conveying the pipeline to the butt joint support by using a crane, and enabling the first limiting slide block to be close to the steel cable;
(32) clamping the first limiting slide block on a steel cable, and then enabling a crane to convey a pipeline downwards until an upper end flange of the pipeline is placed on the first supporting plate and the second supporting plate; connecting the upper end flange with the first supporting plate and the second supporting plate respectively by bolts;
(33) hoisting the next pipeline by using a crane and conveying the next pipeline to the upper part of the butt joint support, removing the bolts for connecting the upper end flange of the previous pipeline with the first support plate and the second support plate, enabling the crane to lower the pipeline, aligning the lower end flange of the pipeline with the upper end flange of the pipeline on the butt joint support and connecting the two flanges by using the bolts;
(34) lifting the pipeline by using a crane to separate the flange of the pipeline from the first support plate and the second support plate, adjusting the first support plate and/or the second support plate to be at a second fixed position on the butt joint support, lowering the pipeline by using the crane until the flange at the upper end of the pipeline positioned at the upper side is close to the first support plate and the second support plate through a gap between the first support plate and the second support plate, and adjusting the first support plate and/or the second support plate to be at a first fixed position on the butt joint support;
(35) enabling the crane to convey the pipeline downwards until the upper end flange of the pipeline positioned at the upper end is placed on the first supporting plate and the second supporting plate; the upper end flange is respectively connected with the first supporting plate and the second supporting plate by bolts;
(36) fixing a second limiting slide block on an upper end flange of the butt joint support, enabling the crane to lift the pipeline again, adjusting the first support plate and/or the second support plate to be at a second fixed position on the butt joint support, enabling the crane to lower the pipeline until the second limiting slide block is close to the steel cable, and clamping the second limiting slide block on the steel cable;
(37) the pipeline is conveyed downwards to the shaft along the steel cable by a crane until reaching the position for installing the pipeline in the shaft.
Preferably, in the above pulling method, between the step (35) and the step (36), further comprising:
(356) and (6) repeating the step (34) until a preset number of joints of pipelines are installed in a butt joint mode, and then entering the step (36).
Preferably, in the above-mentioned pulling method, after the step (4), the method further includes:
(5) repeating the step (3) until the installation of the pipeline in the vertical shaft is finished;
(6) the steel cable is disassembled by the steel cable limiting piece, so that the winch drives the steel cable to fall to the bottom of the vertical shaft until the tensioning balance weight falls to the ground and the tensioning balance weight is disassembled; and lifting the winch to recover the steel cable, and detaching the butt joint support and the steel cable limiting piece.
The invention provides a traction device for hoisting a pipeline in a vertical shaft, which comprises a butt joint support, a winch, a steel cable limiting piece, a limiting slide block and a crane, wherein the butt joint support is fixedly connected with the winch; the butt joint support is used for being fixed on a top step table of the vertical shaft, and a fixed pulley capable of rotating around the axis of the butt joint support is arranged on the butt joint support; a steel cable of the winch bypasses the fixed pulley, and the free end of the steel cable extends into the bottom of the vertical shaft and hangs the tensioning counterweight; the steel cable limiting piece is fixed on the inner wall of the vertical shaft or an inner platform of the vertical shaft, and is also connected with the steel cable to limit the steel cable to shake along the horizontal direction; the limiting slide block is used for being fixed on a pipeline to be hoisted, can be detachably clamped on the steel cable and can slide up and down along the steel cable; the crane is used to hoist and transport the pipe down the wireline to an installation location within the shaft.
When the traction device is applied, the limiting slide block is fixed on the pipeline and clamped on the steel cable, the pipeline is hoisted by the crane and conveyed downwards to the installation position in the vertical shaft along the steel cable, the limiting slide block is disassembled from the steel cable, the hoisting pipeline is horizontally moved to the pipeline in the vertical shaft, the limiting slide block is disassembled from the pipeline, and the hoisting pipeline and the pipeline in the vertical shaft are in butt joint installation and are fixed on the inner wall of the vertical shaft.
The traction device provided by the invention utilizes the steel cable limiting piece to limit the steel cable to shake along the horizontal direction, so that the steel cable is used as a guide rail to guide the pipeline to convey to the lower part of the vertical shaft, and compared with the mode of installing a vertical rigid guide rail on the inner wall of the vertical shaft in the prior art, the traction device can reduce the operation amount and reduce the construction difficulty.
In addition, the traction device provided by the invention utilizes the steel cable and the steel cable limiting piece to replace the rigid guide rail, so that the raw materials can be saved, and the cost can be reduced.
Moreover, the traction device provided by the embodiment of the invention is convenient to disassemble and assemble, pipelines in the vertical shaft can be disassembled after being butted and installed, permanent retention is not needed, the space in the vertical direction in the vertical shaft can be saved, a hoisted descending channel in the vertical shaft can be conveniently recycled, and the traction device can be reinstalled during the subsequent pipeline equipment maintenance; meanwhile, the steel cable limiting piece can be fixed on the in-well platform, the pedal corresponding to the position on the platform in the well can be detached and the steel cable limiting piece can be assembled as required when the traction device is installed, a downlink channel for hoisting a pipeline is formed, the condition that the pipeline crosses the platform in the well to be translated to the installation position in the well is avoided, the problem that the platform blocks a hoisting pipeline translation path is avoided, the platform in the well can be directly built to the pipeline installation position, a temporary operation platform is not required to be built, the installation quality and the progress of pipeline equipment are guaranteed, the pipeline translation channel is not required to be reserved for future maintenance, a user of the pipeline equipment is convenient to use the space in the well, the platform in the well, built to the pipeline equipment, is convenient for maintenance of the pipeline equipment.
The invention also provides a traction method for hoisting a pipeline in a vertical shaft, which is used for the traction device and comprises the following steps: (1) installing a butt joint support, a winch and a steel cable limiting piece; (2) making the steel cable of the winch pass around the fixed pulley, making the free end of the steel cable extend into the bottom of the vertical shaft, and suspending a tensioning counterweight at the free end of the steel cable to connect the steel cable limiting piece with the steel cable; (3) enabling a crane to hoist the pipeline, assembling a limiting slide block on the pipeline, hoisting the pipeline to a position close to the steel cable by using the crane, clamping the limiting slide block on the steel cable, and conveying the pipeline downwards to the vertical shaft along the steel cable by using the crane until the pipeline reaches the position for installing the pipeline in the vertical shaft; (4) and (3) detaching the limiting slide block from the steel cable, translating the pipeline to a butt joint installation position by using a crane, detaching the limiting slide block on the pipeline, assembling the hoisted pipeline and the pipeline in the shaft in a butt joint mode, and fixing the hoisted pipeline on the shaft wall.
The traction method provided by the invention is applied to the traction device and has the characteristics of less workload and low construction difficulty.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a docking cradle according to an embodiment of the present invention;
FIG. 2 is a schematic top view of the docking cradle of FIG. 1;
FIG. 3 is a schematic view of a cable restraint according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a limiting slider according to an embodiment of the present invention;
fig. 5 is a schematic view of the assembly of the traction device and the shaft according to the embodiment of the present invention;
fig. 6 is a schematic view of the assembly of the cable restraint with the shaft platform of fig. 5;
fig. 7 is a top view of the assembly of the traction device and the shaft provided by the embodiment of the invention;
fig. 8 is a schematic view of another angle fitting of the traction device and the shaft according to the embodiment of the present invention;
wherein, in fig. 1-8:
a docking cradle 01; a left frame 1; a right frame 2; a cross beam 3; a first support plate 4; a second support plate 5; a pulley bracket 6; a fixed pulley 7; a wire rope limiter 02; a fixed bracket 8; a mounting plate 9; a restricting slider 03; a pipe connection bracket 10; a mounting block 11; a shifting block 12; a hoist 04; a wire rope 13.
Detailed Description
The embodiment of the invention discloses a traction device for hoisting a pipeline in a vertical shaft, which utilizes a steel cable to guide the hoisted pipeline to be conveyed downwards to the vertical shaft, avoids mounting a vertical rigid guide rail on the inner wall of the vertical shaft, and has the advantages of less workload and low construction difficulty. The embodiment of the invention also discloses a traction method for hoisting the pipeline in the shaft, which is applied to the traction device and has the effects of less workload and low construction difficulty.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a vertical shaft of a large hydropower station, nuclear power and other projects, a top tread platform is erected at the wellhead and serves as an operation platform; the ground platform outside the vertical shaft mouth is a top platform; an operation platform is laid at each installation height position in the shaft, and is an in-shaft platform, and a layer of in-shaft platform is generally arranged at intervals of 10-40 m along the height direction of the shaft according to requirements.
Referring to fig. 1 to 8, an embodiment of the present invention provides a traction apparatus for hoisting a pipeline in a shaft, which includes a docking bracket 01, a winch 04, a cable limiter 02, a limiting slider 03, and a crane; the butt joint support 01 is used for being fixed on a top step table of the vertical shaft, and a fixed pulley 7 capable of rotating around the axis of the butt joint support 01 is arranged on the butt joint support 01; a steel cable 13 of the winch 04 passes around the fixed pulley 7, the free end of the steel cable 13 extends into the bottom of the vertical shaft and hangs a tensioning counterweight, and the winch 04 is used for being fixed on the top platform; the steel cable limiting piece 02 is used for being fixed on the inner wall of the vertical shaft or the platform in the vertical shaft, and the steel cable limiting piece 02 is also used for being connected with the steel cable 13 so as to limit the steel cable 13 from swinging in the horizontal direction; the limiting slide block 03 is used for being fixed on a pipeline to be hoisted; the limiting slider 03 can be detachably clamped on the steel cable 13 and can slide up and down along the steel cable 13; the crane is used to hoist and transport the pipe down the steel cable 13 to a mounting location within the shaft.
When the traction device is applied, the limiting slide block 03 is fixed on a pipeline and clamped on the steel cable 13, the pipeline is hoisted by using a crane and is conveyed downwards to a mounting position in the vertical shaft along the steel cable 13 to the vertical shaft, the limiting slide block 03 is dismounted from the steel cable 13, the hoisting pipeline is horizontally moved to the pipeline in the vertical shaft, the limiting slide block 03 is dismounted from the pipeline, and the hoisting pipeline and the pipeline in the vertical shaft are butt-jointed, mounted and fixed on the inner wall of the vertical shaft.
The traction device provided by the embodiment of the invention utilizes the steel cable limiting piece 02 to limit the steel cable 13 to shake along the horizontal direction, so that the steel cable 13 is used as a guide rail to guide a hoisting pipeline to be conveyed to the lower part of the vertical shaft, and compared with the mode of installing a vertical rigid guide rail on the inner wall of the vertical shaft in the prior art, the traction device can reduce the workload and reduce the construction difficulty.
In addition, the traction device provided by the embodiment of the invention utilizes the steel cable 13 and the steel cable limiting piece 02 to replace a rigid guide rail, so that the raw materials can be saved, and the cost can be reduced.
Moreover, the traction device provided by the embodiment of the invention is convenient to disassemble and assemble, pipelines in the vertical shaft can be disassembled after being butted and installed, permanent retention is not needed, the space in the vertical direction in the vertical shaft can be saved, a hoisted descending channel in the vertical shaft can be conveniently recycled, and the traction device can be reinstalled during the subsequent pipeline equipment maintenance; meanwhile, the steel cable limiting part 02 can be fixed on an in-well platform, the pedal of the corresponding position on the platform in the well can be detached and the steel cable limiting part 02 can be assembled as required when the traction device is installed, a downlink channel of a hoisting pipeline is formed, the condition that the pipeline crosses the platform in the well to be translated to the installation position in the well is avoided, the problem that the platform blocks the translation path of the hoisting pipeline is avoided, the platform in the well can be directly built to the pipeline installation position, a temporary operation platform is not required to be built, the installation quality and the progress of pipeline equipment are guaranteed, the pipeline translation channel is not required to be reserved for future maintenance, a user is convenient to use the space in the well, the platform in the well, built to the pipeline equipment, is convenient for maintenance of the pipeline equipment to be utilized by patrol personnel.
Specifically, above-mentioned steel cable restriction member 02 sets up to a plurality ofly, and each steel cable restriction member 02 can be according to the mounted position of pipeline in the shaft to and the position of well platform, set up to fixing on the well platform of difference entirely, fix on the shaft inner wall of co-altitude not, perhaps the part is fixed on the well platform of difference, the part is fixed on the shaft inner wall of co-altitude not, this embodiment does not do the injecion, only need ensure that each steel cable restriction member 02 sets gradually along vertical direction, make steel cable 13 keep vertical can.
Among the above-mentioned draw gear, the hoist can be used to hoist a section of pipeline to the mounted position in the well at every turn, and is corresponding, docking support 01 is as the mounting platform of fixed pulley 7, but in order to improve the assembly efficiency of the interior piping arrangement of well, the hoist sets up to be used for hoisting the pipeline of multisection butt joint installation in advance to the mounted position in the well at every turn, and is corresponding, docking support 01 removes the mounting platform as fixed pulley 7, still is used for providing the operation platform of butt joint installation in advance to the pipeline of multisection waiting to hoist, and docking support 01 specifically includes:
the fixed pulley 7 can be arranged on the bracket body in a way of rotating around the axis of the fixed pulley; the support body includes: a pulley bracket 6, and a left frame 1 and a right frame 2 which are respectively fixedly connected with the top tread platform; the left frame and the right frame are fixedly connected through a cross beam 3; the pulley bracket 6 is respectively fixedly connected with the left frame and the right frame, and the fixed pulley 7 can be arranged on the pulley bracket 6 in a way of rotating around the axis of the fixed pulley;
a first support plate 4 fixed on the bracket body; the first supporting plate 4 is specifically fixed on the left frame 1;
a second support plate 5 fixed to the bracket body; the second support plate 5 is fixed on the right frame 2;
wherein at least one of the first support plate 4 and the second support plate 5 has an adjustable fixed position on the bracket body; when the pipelines to be hoisted are installed in a butt joint mode, the first supporting plate 4 and/or the second supporting plate 5 are/is located at a first fixed position, and the two supporting plates support flanges at the end portions of the pipelines; after the flanges of the two pipes are installed in a butt joint mode, the first supporting plate 4 and/or the second supporting plate 5 are/is located at a second fixing position, so that the pipes installed in a butt joint mode can be conveyed downwards through a gap between the first supporting plate 4 and the second supporting plate 5.
In the above solution, both the first and the second support plates are preferably configured such that only one of the fixing positions on the bracket body is adjustable, so as to avoid the user from adjusting the fixing positions of the two support plates, thereby simplifying the user operation procedure. The first supporting plate 4 and the second supporting plate 5 are fixed on the support body through bolts respectively, the first supporting plate 4 and/or the second supporting plate 5 can be set to have a plurality of assembling holes, the fixing position of the first supporting plate 4 and/or the second supporting plate 5 can be adjusted through adjusting different assembling holes and matching with the bolts, or the assembling holes matched with the bolts on the first supporting plate 4 and/or the second supporting plate 5 are set to be strip holes, as shown in fig. 2, a user can adjust the fixing position of the first supporting plate 5 and/or the second supporting plate 5 through adjusting the positions of the bolts in the strip holes.
Specifically, in the above traction apparatus: the steel cable limiting piece 02 comprises a fixed bracket 8, a mounting plate 9 and a clamping ring; the fixed bracket 8 is used for being fixed on the inner wall of the shaft or the shaft platform of the shaft; the mounting plate 9 is fixed on the fixed bracket 8; the snap ring is arranged on the periphery of the steel cable 13 and is detachably fixed on the mounting plate 9. The mounting plate 9 is arranged to be fixed to the bracket 8 by bolts, as shown in fig. 3; the snap ring is "C" shape, and its both ends pass through bolt detachably to be fixed on mounting panel 9.
As in the above traction apparatus, the restricting slider 03 includes a pipe connecting bracket 10 and a mounting block 11; the pipeline connecting support 10 is used for being fixedly connected with a pipeline to be hoisted, and a mounting hole is formed in the pipeline connecting support 10 and is used for being fixedly connected with a flange at the end part of the pipeline through a fixing piece; the mounting block 11 is fixed on the pipeline connecting bracket 10 and forms a steel cable clamping groove together with the pipeline connecting bracket 10; wherein, the installation piece 11 passes through the fix with screw on pipeline linking bridge 10, and installation piece 11 is rectangular hole with screw complex pilot hole, clamp restriction slider 03 in steel cable 13 time, loosen the screw earlier, draw installation piece 11 to keeping away from pipeline linking bridge 10, so that installation piece 11 avoids the installation space of steel cable 13, then press close to steel cable 13 with pipeline linking bridge 10, again with installation piece 11 push back the normal position, make steel cable 13 be located the steel cable clamping groove that installation piece 11 and pipeline linking bridge 10 enclose just, it can to tighten the screw at last. The procedure for detaching the restraining slider 03 from the cable 13 is the reverse of the above-described clamping procedure and will not be described in detail.
Furthermore, the limiting slide block 03 also comprises a shifting block 12 arranged on the pipeline connecting bracket 10; the shifting block 12 has a closing state and an opening state, and in the closing state, the shifting block 12 blocks the opening of the steel cable clamping groove to prevent the steel cable 13 from falling off from the steel cable clamping groove; in the open position, the catch 12 is disengaged from the opening of the cable-catch groove, so that the mounting plate 9 of the cable stop 02 passes through the cable-catch groove when the stop block 03 slides down the cable 13.
Specifically, the state of the shifting block 12 can be changed by manual driving of a user, but in order to simplify user operation and improve pipeline hoisting efficiency, the limiting slider 03 further comprises an elastic member, and the elastic member is respectively connected with the shifting block 12 and the pipeline connecting bracket 10 and is used for driving the shifting block 12 to be maintained in a closed state; when the limiting slider 03 slides downwards along the steel cable 13 and passes through the mounting plate 9, the mounting plate 9 tightly pushes the shifting block 12 and drives the shifting block 12 to move against the resistance of the elastic piece so as to switch to an open state, and the mounting plate 9 passes through the steel cable clamping groove; after the mounting plate 9 is separated from the restricting slider 03, the shifting block 12 returns to the closed state under the driving action of the elastic element until the restricting slider 03 reaches the mounting plate 9 of the next cable restricting member 02. Specifically, the shifting block 12 is hinged on the pipeline connecting bracket 10, and the free end of the shifting block 12 is driven by the elastic piece to be buckled at the opening of the steel cable clamping groove. In particular, the finger 12 is located on the upper surface of the pipe coupling bracket 10 to ensure that the mounting block 11 pushes the free end of the finger 12 out of the opening of the cable trap slot as the restraint slider 03 slides down the cable 13. The elastic member can be a torsion spring sleeved on the hinge shaft of the shifting block 12, and two ends of the torsion spring respectively support against the shifting block 12 and the pipeline connecting bracket 10.
In the traction device provided by this embodiment, the limiting slider 03 not only ensures that the steel cable 13 does not deviate from the steel cable limiting groove, but also ensures that the limiting slider 03 can automatically avoid and smoothly pass through the mounting plate 9 when passing through the steel cable limiting part 02 along with the pipeline.
The two winches 04 are respectively provided with one steel cable, and correspondingly, the two fixed pulleys 7 are respectively matched with the steel cables 13 of the two winches 04; the limiting slide blocks 03 are clamped on the steel cables 13 of the two windlasses 04 at the same time, the number of the mounting blocks 11 of the limiting slide blocks 03 is two, the two mounting blocks 11 and the pipeline connecting bracket 10 enclose a steel cable clamping groove matched with the two steel cables 13 respectively, and the two steel cable clamping grooves are symmetrically arranged and jointly form a mounting plate channel so that the mounting plate 9 can pass through the mounting plate channel; the two shifting blocks 12 are respectively matched with the two cable clamping grooves, as shown in figure 4.
The crane may be configured as a shaft on-site equipped top bridge crane, or may be additionally configured as another type of crane, and the present embodiment is not limited to the type of crane.
The traction device provided by the embodiment is particularly suitable for a vertical shaft with high fall, ensures that the pipeline is stably conveyed downwards along the vertical direction in the vertical shaft, is convenient to assemble and disassemble, and can be disassembled and recycled.
The embodiment of the invention also provides a traction method for hoisting a pipeline in a vertical shaft, which is used for the traction device provided by the embodiment and comprises the following steps:
(1) installing a butt joint bracket 01, a winch 04 and a steel cable limiting piece 02;
when the step is carried out, fixing a winch 04 on a top platform of the vertical shaft; fixing a butt joint support 01 on an H steel beam of a top tread platform of a vertical shaft by using a fixing piece (the H steel beam is provided with a pre-processed fixing piece mounting hole), and removing a pedal of the top tread platform before fixing, particularly removing a position where a pipeline needs to be laid and a pedal within a range of 1.5 times of the diameter of the pipeline at the front end of the position; the steel cable limiting piece 02 is installed on the inner wall of the vertical shaft and/or an inner platform of the well as required, when the steel cable limiting piece is installed on the inner platform of the well, pedals which correspond to the butt joint support 01 up and down on the inner platform of the well are firstly removed, and then the steel cable limiting piece 02 is fixed on a steel beam of the inner platform of the well by using bolts;
a top bridge crane is generally configured on the shaft site, and when the hoisting height or load of the top bridge crane does not meet the requirements, the step (1) is carried out, and top bridge cranes of other types or cranes of other types can be installed as required;
(2) the wire rope 13 of the winch 04 is wound around the fixed pulley 7, the free end of the wire rope 13 extends into the bottom of the vertical shaft, and a tension counterweight is hung at the free end of the wire rope 13, so that the wire rope limiting piece 02 is connected with the wire rope 13;
the two winches 04 are provided, the corresponding fixed pulleys 7 are provided, and after the steel cables 13 on the two winches 04 are released, the two steel cables 13 are respectively wound around the two fixed pulleys 7; after the tension weight is hung and the steel cable limiting piece 02 is connected with the steel cable 13, whether the tension of the steel cable 13 is effective or not is checked in a mode of manually horizontally pulling the steel cable 13, if the steel cable 13 is softer, the tension weight can be increased;
(3) enabling a crane to hoist the pipeline, assembling a limiting slide block 03 on the pipeline, hoisting the pipeline to a position close to a steel cable 13 by using the crane, clamping the limiting slide block 03 on the steel cable 13, and conveying the pipeline downwards to the vertical shaft along the steel cable 13 by using the crane until the pipeline reaches the position for installing the pipeline in the vertical shaft;
(4) the limiting sliding block 03 is detached from the steel cable 13, the pipeline is translated to the butt joint installation position by using a crane, the limiting sliding block 03 on the pipeline is detached, and then the hoisted pipeline is butt-jointed and assembled with the pipeline in the shaft and is fixed on the shaft wall.
In the step (3), the crane can be set to hoist one pipeline to be conveyed to the position of the pipeline to be installed in the shaft according to the load of the crane, the size and the weight of the pipeline, and correspondingly, the step (3) is specifically as follows:
the method comprises the steps of respectively assembling limiting sliders 03 on flanges at two ends of a pipeline, hoisting the pipeline to a position where a lower end flange of the pipeline is close to a steel cable 13 by using a crane, clamping the limiting sliders 03 on the lower end flange on the steel cable 13, then lowering the pipeline to a position where an upper end flange of the pipeline is close to the steel cable 13 by using the crane, clamping the limiting sliders 03 on the upper end flange on the steel cable 13, and conveying the pipeline downwards to a vertical shaft along the steel cable 13 by using the crane until the position where the pipeline is installed in the vertical shaft is reached.
In the case that the crane load allows, the crane is preferably configured to perform step (3) to hoist each time the plurality of lengths of previously butt-installed pipes to the position of the pipe to be installed in the shaft, and accordingly, step (3) includes:
(31) assembling a first limiting sliding block on a flange at one end of a first section of pipeline, and vertically hoisting the pipeline from the other end of the pipeline by using a crane so as to enable the flange assembled with the first limiting sliding block to be positioned at the lower end; the pipeline is conveyed to the butt joint bracket 01 by a crane, and the first limiting slide block 03 is close to the steel cable 13;
(32) clamping the first limiting slide block 03 on the steel cable 13, and then enabling the crane to convey the pipeline downwards until the upper end flange of the pipeline is placed on the first supporting plate 4 and the second supporting plate 5; the upper end flange is respectively connected with the first supporting plate 4 and the second supporting plate 5 by bolts;
(33) hoisting the next pipeline by using a crane and conveying the next pipeline to the upper part of the butt joint support 01, removing the bolts for connecting the upper end flange of the previous pipeline with the first support plate and the second support plate, lowering the hoisting pipeline by using the crane, aligning the lower end flange of the hoisting pipeline with the upper end flange of the pipeline on the butt joint support 01 and connecting the two flanges by using the bolts;
(34) lifting the pipeline by using a crane to separate the flange of the pipeline from the first support plate 5 and the second support plate 5, adjusting the first support plate 4 and/or the second support plate 5 to be at a second fixed position on the butt joint support 01, lowering the pipeline by using the crane until the flange at the upper end of the pipeline positioned at the upper side is close to the first support plate 5 and the second support plate 5 through a gap between the first support plate 5 and the second support plate 5, and adjusting the first support plate 4 and/or the second support plate 5 to be at a first fixed position on the butt joint support 01;
(35) enabling the crane to convey the pipeline downwards until the upper end flange of the pipeline positioned at the upper end is placed on the first supporting plate 4 and the second supporting plate 5; the upper end flange is respectively connected with a first supporting plate 4 and a second supporting plate 5 by bolts;
(36) fixing the second limiting slide block 03 on the flange at the upper end of the butt joint support 01, enabling the crane to lift the pipeline again, adjusting the first support plate 4 and/or the second support plate 5 to be at a second fixed position on the butt joint support 01, then enabling the crane to lower the pipeline until the second limiting slide block 03 is close to the steel cable 13, and clamping the second limiting slide block 03 on the steel cable 13;
(37) the pipe is transported down the shaft along the wire rope 13 by the crane until the point in the shaft where the pipe is installed is reached.
Further, as in the above-mentioned traction method, step (3) is to make the crane hoist two pipes which are installed in a butt joint manner to the position of the pipe to be installed in the shaft each time, and when hoisting 3 or more pipes which are installed in a butt joint manner each time, the method further includes between step (35) and step (36):
(356) and (6) repeating the step (34) until a preset number of joints of pipelines are butted, and then entering the step (36).
Specifically, in the above-mentioned pulling method, after the step (4), the method further comprises:
(5) repeating the step (3) until the installation of the pipeline in the vertical shaft is finished;
(6) detaching the steel cable 13 from the steel cable limiting piece 02, so that the winch 04 drives the steel cable 13 to descend towards the bottom of the shaft until the tensioning weight descends and the tensioning weight is detached; lifting the winch 04 to recover the steel cable 13, and disassembling the butt joint support 01 and the steel cable limiting piece 02;
the step is carried out by reassembling the disassembled footsteps of the top footstep, and if the footsteps of the well platform are disassembled in the step, the footsteps of the well platform are reassembled in the step.
And (3) repeating the step (1) when the pipeline device is required to be installed at other positions in the shaft.
The traction method provided by the embodiment of the invention is applied to the traction device and has the characteristics of less workload and low construction difficulty. Of course, the traction method provided in this embodiment also has other effects of the traction device provided in the above embodiments, and is not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The method disclosed by the embodiment corresponds to the device disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the device part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a draw gear of hoist and mount pipeline in shaft which characterized in that includes:
the butt joint support is used for being fixed on a top step table of the vertical shaft, and a fixed pulley is arranged on the butt joint support;
the steel cable of the winch bypasses the fixed pulley, and the free end of the steel cable extends into the bottom of the vertical shaft and is hung with a tensioning counterweight;
the steel cable limiting piece is fixed on the inner wall of the vertical shaft or the inner platform of the vertical shaft and is connected with the steel cable so as to limit the steel cable to shake in the horizontal direction;
the limiting sliding block is used for being fixed on a pipeline to be hoisted; the limiting slide block is detachably clamped on the steel cable and can slide up and down along the steel cable;
a crane for hoisting a pipe and transporting the pipe down the cable to an installation location within the shaft.
2. The towing attachment in accordance with claim 1 wherein the docking cradle is adapted to provide a pre-docked mounted operating platform for a plurality of lengths of pipe to be hoisted, the docking cradle comprising:
the fixed pulley can be arranged on the bracket body in a rotating mode around the axis of the fixed pulley;
the first supporting plate is fixed on the bracket body;
the second supporting plate is fixed on the bracket body;
wherein a fixed position of at least one of the first support plate and the second support plate on the stent body is adjustable; when a plurality of sections of pipelines to be hoisted are installed in a butt joint mode, the first supporting plate and/or the second supporting plate are/is located at a first fixed position, and the two supporting plates support flanges at the end portions of the pipelines; after the flange butt joint installation of two pipelines is accomplished, first backup pad and/or the second backup pad is in second fixed position, and the clearance between two backup pads increases, makes the pipeline of butt joint installation pass through first backup pad with clearance between the second backup pad is carried downwards.
3. A traction device as claimed in claim 1, wherein the cable restraint comprises a fixing bracket for fixing to an inner wall of the shaft or to an internal platform of the shaft;
the mounting plate is fixed on the fixed support;
and the clamping ring is arranged on the periphery of the steel cable and is detachably fixed on the mounting plate.
4. The towing attachment in accordance with claim 3 wherein the limit slider includes:
the pipeline connecting support is used for being fixedly connected with the pipeline to be hoisted;
and the mounting block is fixed on the pipeline connecting support and forms a steel cable clamping groove together with the pipeline connecting support.
5. The draft gear according to claim 4, wherein said restricting slider further comprises a paddle disposed on said pipe connecting bracket; the shifting block is provided with a closing state and an opening state, and in the closing state, the shifting block blocks the opening of the steel cable clamping groove to prevent the steel cable from falling off from the opening of the steel cable clamping groove; in the opening state, the shifting block is separated from the opening of the steel cable clamping groove, so that the mounting plate passes through the steel cable clamping groove when the limiting slider slides downwards along the steel cable and reaches the mounting plate.
6. The draft gear according to claim 5, wherein said restricting slider further comprises an elastic member connected to said shifting block and said pipe connecting bracket and driving said shifting block to be maintained in a closed state; when the limiting sliding block slides downwards along the steel cable and passes through the mounting plate, the mounting plate tightly props against the shifting block and drives the shifting block to overcome the resistance of the elastic piece to move and switch to an opening state.
7. A method of towing a hoisted pipeline in a shaft for use in a towing installation as claimed in any one of claims 1 to 6, comprising:
(1) installing a butt joint support, a winch and a steel cable limiting piece;
(2) making the steel cable of the winch pass around the fixed pulley, making the free end of the steel cable extend into the bottom of the vertical shaft, and suspending a tensioning counterweight at the free end of the steel cable to connect the steel cable limiting piece with the steel cable;
(3) enabling a crane to hoist the pipeline, assembling a limiting slide block on the pipeline, hoisting the pipeline to a position close to the steel cable by using the crane, clamping the limiting slide block on the steel cable, and conveying the pipeline downwards to the vertical shaft along the steel cable by using the crane until the pipeline reaches the position for installing the pipeline in the vertical shaft;
(4) and (3) detaching the limiting slide block from the steel cable, translating the pipeline to a butt joint installation position by using a crane, detaching the limiting slide block on the pipeline, assembling the hoisted pipeline and the pipeline in the shaft in a butt joint mode, and fixing the hoisted pipeline on the shaft wall.
8. The pulling method as recited in claim 7, wherein the step (3) includes:
(31) assembling a first limiting sliding block on a flange at one end of a first section of pipeline, and vertically hoisting the pipeline from the other end of the pipeline by using a crane so as to enable the flange assembled with the first limiting sliding block to be positioned at the lower end; conveying the pipeline to the butt joint support by using a crane, and enabling the first limiting slide block to be close to the steel cable;
(32) clamping the first limiting slide block on a steel cable, and then enabling a crane to convey a pipeline downwards until an upper end flange of the pipeline is placed on the first supporting plate and the second supporting plate; connecting the upper end flange with the first supporting plate and the second supporting plate respectively by bolts;
(33) hoisting the next pipeline by using a crane and conveying the next pipeline to the upper part of the butt joint support, removing the bolts for connecting the upper end flange of the previous pipeline with the first support plate and the second support plate, enabling the crane to lower the pipeline, aligning the lower end flange of the pipeline with the upper end flange of the pipeline on the butt joint support and connecting the two flanges by using the bolts;
(34) lifting the pipeline by using a crane to separate the flange of the pipeline from the first support plate and the second support plate, adjusting the first support plate and/or the second support plate to be at a second fixed position on the butt joint support, lowering the pipeline by using the crane until the flange at the upper end of the pipeline positioned at the upper side is close to the first support plate and the second support plate through a gap between the first support plate and the second support plate, and adjusting the first support plate and/or the second support plate to be at a first fixed position on the butt joint support;
(35) enabling the crane to convey two connected pipelines downwards until the upper end flange of the pipeline positioned at the upper end is placed on the first supporting plate and the second supporting plate; the upper end flange is respectively connected with the first supporting plate and the second supporting plate by bolts;
(36) fixing a second limiting slide block on an upper end flange of the butt joint support, enabling the crane to lift the pipeline again, adjusting the first support plate and/or the second support plate to be at a second fixed position on the butt joint support, enabling the crane to lower the pipeline until the second limiting slide block is close to the steel cable, and clamping the second limiting slide block on the steel cable;
(37) the pipeline is conveyed downwards to the shaft along the steel cable by a crane until reaching the position for installing the pipeline in the shaft.
9. The pulling method as set forth in claim 8, further comprising, between the step (35) and the step (36):
(356) and (6) repeating the step (34) until a preset number of joints of pipelines are installed in a butt joint mode, and then entering the step (36).
10. The pulling method as set forth in claim 7, wherein step (4) is further followed by:
(5) repeating the step (3) until the installation of the pipeline in the vertical shaft is finished;
(6) the steel cable is disassembled by the steel cable limiting piece, so that the winch drives the steel cable to fall to the bottom of the vertical shaft until the tensioning balance weight falls to the ground and the tensioning balance weight is disassembled; and lifting the winch to recover the steel cable, and detaching the butt joint support and the steel cable limiting piece.
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| CN201810681199.7A CN108506568B (en) | 2018-06-27 | 2018-06-27 | Traction device and traction method for hoisting pipeline in vertical shaft |
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| CN201810681199.7A CN108506568B (en) | 2018-06-27 | 2018-06-27 | Traction device and traction method for hoisting pipeline in vertical shaft |
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| CN109537851B (en) * | 2018-11-30 | 2020-09-29 | 中建八局第一建设有限公司 | Prefabricating method of assembled pipe well |
| CN110005354B (en) * | 2019-04-12 | 2021-06-22 | 山东黄金矿业股份有限公司新城金矿 | Method for lowering pipes in vertical drilling holes through multiple pipelines |
| CN111792544B (en) * | 2020-06-18 | 2022-04-08 | 中交一公局集团有限公司 | Shield tunneling machine downhole installation method and installation frame used by same |
| CN113371581B (en) * | 2021-06-02 | 2022-04-19 | 中国长江电力股份有限公司 | Hoisting and overhauling method for 500kV welded GIL vertical section pipeline |
| CN117419218B (en) * | 2023-10-18 | 2024-06-25 | 中建四局安装工程有限公司 | Method for installing prefabricated pipe in vertical shaft |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354150A (en) * | 1993-02-08 | 1994-10-11 | Canales Joe M | Technique for making up threaded pipe joints into a pipeline |
| US6969217B1 (en) * | 2004-06-17 | 2005-11-29 | Basinger Jon E | Pipe puller |
| NL1026458C2 (en) * | 2004-06-18 | 2005-12-20 | Itrec Bv | Cranes and offshore vessel. |
| DE602005012805D1 (en) * | 2005-05-10 | 2009-04-02 | Itrec Bv | System for laying underwater pipes and lifting device |
| CN203128099U (en) * | 2013-03-14 | 2013-08-14 | 潍坊昌大建设集团有限公司 | Slipping type pipeline lifting device |
| GB2545702B (en) * | 2015-12-22 | 2020-01-15 | Gately Pearse | Pipe laying apparatus |
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Effective date of registration: 20200806 Address after: 710077 509 Daqing Road, Lianhu District, Xi'an, Shaanxi Co-patentee after: CHINA XD ELECTRIC Co.,Ltd. Patentee after: XI'AN XD SWITCHGEAR ELECTIC Co.,Ltd. Co-patentee after: THREE GORGES ELECTRICAL AND MECHANICAL ENGINEERING TECHNOLOGY Co.,Ltd. Address before: 710077 509 Daqing Road, Lianhu District, Xi'an, Shaanxi Co-patentee before: CHINA XD ELECTRIC Co.,Ltd. Patentee before: XI'AN XD SWITCHGEAR ELECTIC Co.,Ltd. |
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