51results about How to "Reduce lifting difficulty" patented technology

The invention discloses a port fixture for steel pipe hoisting. The port fixture for steel pipe hoisting comprises a motor cover, a connection cross rod, a fixing block and a second slide block, wherein a screw rod is rotationally installed at the middle position in the connection cross rod, four first slide grooves are symmetrically formed in the connection cross rod and around the screw rod, thesecond slide block is of a cross-shaped structure, and the middle position of the second slide block is in threaded connection with the screw rod; and the fixing block is fixedly installed at the right end of the connection cross rod, four slide rods are symmetrically installed around the fixing block, a slide sleeve is arranged on the slide rod, a second slide groove is formed in one end away from the fixing block, of the slide sleeve, a first slide block is slidably installed in the second slide groove, and a press plate is fixedly installed at the other end of the first slide block. According to the port fixture for steel pipe hoisting, the cross-shaped second slide block is driven to slide through the screw rod, so that the four slide sleeves are driven to slide; and the inner wall ofthe steel pipe is extruded and fixed through the press plate provided with anti-slide lines, so that the stability during the steel pipe hoisting is improved.

The invention belongs to the floating bridge field and in particular relates to a concrete floating bridge of a floating wharf. The concrete floating bridge of the floating wharf comprises a main bridge box, an auxiliary bridge box, a connecting rack and a pile type abutment; the main bridge box and the auxiliary bridge box are fixedly lapped on a seafloor pile by use of the connecting rack. The pile type abutment comprises a pile, a pile holder and a bridge box; the pile holder is fixed with the pile and comprises a pile holder main part, a pile holder auxiliary part, a roller and a roller bracket; the roller is fixed on the roller bracket and horizontally fixed on the pile holder. Six faces of the bridge box are all formed by use of reinforced concrete slabs and the reinforced concrete slabs of the bridge box are all coated with a silane anticorrosive material. The concrete floating bridge of the floating wharf is low in cost, high in safety performance, good in wave resistance, good in stability, excellent in durability, high in resistance to freezing and thawing, movable according to requirements and wide in application fields; the concrete floating bridge can be slightly modified into a floating airport for helicopters and a temporary floating wave barrier dam.

The invention discloses cofferdam equipment applied to a diversion canal and an assembly method thereof. The cofferdam equipment comprises a longitudinal cofferdam, transverse cofferdams, a power boat, anchoring devices and supporting trusses, wherein the longitudinal cofferdam is pressed on a canal bottom lining board; the transverse cofferdams are pressed on a canal slope lining board and are separately connected to the two ends of the longitudinal cofferdam to form a U-shaped cofferdam; the restored board to be lined of the diversion canal is positioned within an envelope range of the U-shaped cofferdam; the two supporting trusses are separately mounted between the two transverse cofferdams; the two or more anchoring devices are fixedly arranged on a canal embankment; each anchoring device is connected to the longitudinal cofferdam or the transverse cofferdams through anchoring chains; and the power boat is positioned at the water side of the longitudinal cofferdam. The longitudinalcofferdam and the transverse cofferdams are assembled on water, are injected with water to sink, are positioned by the anchoring chains, float after water pumping, and are dismounted, so that zero emission of the canal can be realized.

The invention relates to the technical field of cold smelting lifting, in particular to a rotary fine-adjustment lifting appliance capable of arranging a negative plate. A transverse lead screw is rotationally connected to the position, located at the middle section, of the inner side of a main beam frame, a transverse sliding plate is arranged on the inner side of the main beam frame, the transverse lead screw is rotationally connected with the interior of the transverse sliding plate through a thread, two transverse guide rods are slidably connected to the two ends of the interior of the transverse sliding plate in a penetrating mode, the two ends of the two transverse guide rods are fixed to the inner side of the main beam frame, and a transverse servo motor is installed at the position, corresponding to the transverse lead screw, of one end of the main beam frame. Through an arranging driving mechanism, an arranging rotating shaft is driven to rotate synchronously, so that a rotating rod is driven to rotate synchronously, arranging rollers are attached to the surfaces of the cathode plates on the two sides of the arranging rollers, the cathode plates can be positioned in a horizontal direction, and the phenomenon that acid liquor on the surfaces of the cathode plates is splashed due to collision between the cathode plates during hoisting can be prevented.

The invention discloses a steel arch frame assembling and transverse moving system and method for an upper bearing type arch bridge construction. The system comprises an arch frame assembling device for assembling a steel arch frame and an arch frame supporting and transverse moving device for supporting and transversely moving the assembled steel arch frame. The method comprises the following steps that 1, a bridge lower supporting structure and steel arch frame support are constructed, and a horizontal moving slide way and a lifting device are installed; 2, a cable crane and the arch frame are transferred to the device in section for construction; 3, the steel arch frame is assembled; 4, an arch supporting frame is jacked; 5, the arch supporting frame is lowered; 6, a transverse moving driving device is installed; 7, the arch supporting frame is transversely moved; and 8, the arch supporting frame is jacked. The steel arch frame assembling and transverse moving system and method forthe upper bearing type arch bridge construction are reasonable in design, convenience and simple are realized, the use effect is good; the arch frame assembling device and the arch frame supporting and transverse moving device are matched and used, the steel arch frame assembling process can be completed simply and quickly, the steel arch frame can be transversely moved through the arch support and the transverse moving device, and the purpose of constructing the two arch ribs through the steel arch frame is achieved.

The invention provides an adjustable track beam girder erection platform. The adjustable track beam girder erection platform comprises a base and a positioning and storing device; the base can be arranged on a bridge pier, and the positioning and storing device is used for allowing a track beam to be placed; the adjustable track beam girder erection platform further comprises at least two sets ofadjusting mechanisms arranged on the base, wherein each adjusting mechanism supports and fixes the positioning and storing device and is distributed between the base and the positioning and storing device at intervals, each adjusting mechanism comprises a sliding assembly capable of moving in a bridge clockwise direction and a bridge transverse direction, and the sliding assembly supports the positioning and storing device. The invention further provides a track beam girder erection method, and the girder erection platform is adopted. The girder erection platform can accurately control the attitude of the track beam on the bridge pier, the track beam does not need to be precisely controlled when the track beam is hoisted and constructed, the hoisting difficulty of the track beam can be greatly reduced, the installation precision requirement of the track beam can be met, the control is easy, the adjustment is convenient, in addition, the girder erection platform can be reused, and the economical efficiency is also good.

The invention discloses a vertical rotating and lifting construction method of a steel structure arch rib. The vertical rotating and lifting construction method of the steel structure arch rib comprises: constructing bridge piers and each temporary foundation, installing temporary rotating hinges on arch springing embedded sections of the bridge piers, erecting a tower and arranging lifting devices at the top of the tower; assembling first main arch sections and second main arch sections, installing main body sections of the second main arch sections, and hinging one ends of the first main arch sections and one ends of the second main arch sections to the corresponding temporary rotating hinges; installing an anchorage, synchronously vertically rotating and lifting the first main arch sections, and monitoring the horizontal displacement of the tower; supplementarily installing interference sections, connected with the main body sections, of the second main arch sections; synchronouslyvertically rotating and lifting the second main arch sections, and carrying out monitoring; installing closure sections, and supplementarily installing the temporary rotating hinges; uninstalling thelifting devices; and constructing concrete side arches. According to the vertical rotating and lifting construction method, a bridge rib is divided into five sections and assembly is carried out on the ground, the installation quality is high, a main arch is divided into two sections for vertical rotating and lifting, the stress of each stress point and the tower is constantly monitored during thevertical rotating process, the difficulty of lifting is reduced, the construction is easy, the construction period can be effectively shortened, and the safety and stability of the lifting process are guaranteed.

The invention discloses an adjustable double-fulcrum electronic module pulling tool. The adjustable double-fulcrum electronic module pulling tool consists of a supporting frame, a lifting bracket, sliding support legs and a sliding hook; the supporting frame consists of a supporting top plate and a supporting frame retaining block; the lifting bracket consists of a lifting plate and a lifting retaining block; each sliding support leg is composed of a supporting frame fixing U-shaped clamp, a lifting limiter, a sliding strut and a support leg limiting block; the sliding hook is composed of a lifting bracket upper shoulder baffle, a hook strut and a lifting bracket lower shoulder baffle; the supporting frame fixing U-shaped clamp on each sliding support leg is clamped inside a groove of thesupporting frame; the lifting limiter of each sliding support leg is clamped in an open hole of the lifting bracket; and the sliding hook is clamped inside the open hole of the lifting bracket and isarranged between the sliding support legs. The adjustable double-fulcrum electronic module pulling tool disclosed by the invention can be used for reducing the pulling difficulty of electronic modulesand the damage risk of the equipment, is also applicable to different types of electronic equipment, is good in universality and provides great conveniences for engineering maintainers.

The invention discloses a deck type box arch bridge reconstruction method. The method comprises the steps: 1 first-dismantled arch bridge dismantling; 2 first-constructed arch bridge constructing, wherein the steps comprises 201 bridge lower portion support structure constructing, 202 arch rib constructing and 203 follow-up constructing; 3 later-dismantled arch bridge dismantling; 4 later-constructed arch bridge constructing, wherein the steps comprises 401 bridge lower portion support structure constructing, 402 arch rib constructing and 403 follow-up constructing. The method has the advantages that the step design is reasonable in step design, construction is simple and convenient, the using effect is good, two to-be-dismantled arch bridges of a reconstructed deck type arch bridge are dismantled first and later, and the later-dismantled arch bridge of the reconstructed deck type arch bridge is dismantled after construction of a first-constructed arch bridge in a newly-built arch bridge is completed to meet the smooth traffic requirement; and in addition, two arch ribs are constructed first and later by adopting one steel arc frame, the steel arch frame is supported and transversely moved by adopting an arch frame supporting and transverse moving device, and therefore the reconstruction efficiency of the deck type arch bridge can be effectively improved.

The invention discloses an operating device for power grid configuration. The device comprises an insulating operating rod and a grounding wire clamp. The upper end of the insulating operating rod isprovided with a connecting female end. The lower end of the insulating operating rod is provided with a connecting male end corresponding to the connecting female end, the connecting male end is usedfor splicing more than two insulating operating rods, the lower end of the grounding wire clamp is provided with a mounting column, and a locking prompter is arranged in the mounting column and used for prompting the clamping state of the grounding wire clamp; a magnetic joint is arranged at the lower end of the mounting column; a magnetic male end is arranged between the magnetic joint and the connecting female end; a magnetic attraction rod matched with the magnetic attraction joint is arranged at the upper end of the magnetic attraction male end; the lower end of the magnetic attraction male end is provided with a first connecting rod matched with the connecting female end, and the first connecting rod is used for connecting the grounding wire clamp to the insulating operating rod through the magnetic attraction male end, so as to solve the problems that a worker often needs to climb the grounding wire clamp when the grounding wire clamp is used for hanging a wire, and certain potential safety hazards exist when the insulating operating rod is used.

The invention discloses a special purpose machine tool for circular mold drilling. The special machine tool comprises a machine tool bed body, wherein main shaft seats are arranged on the two sides ofthe top end of the machine tool bed body, and the two sides of the top ends of the two main shaft seats are correspondingly provided with main shafts; the middle part of the top end of the machine tool bed body is provided with a hydraulic telescopic rod, the middle part of the top end of the hydraulic telescopic rod is provided with a rotating table, and the middle part of the top end of the rotating table is provided with a clamping jaw; and a groove is formed in the middle end of the outer surface of the rotating table, and the middle part of the inner wall of the groove is provided with apositioning mechanism. The special purpose machine tool for the circular mold drilling is scientific and reasonable in structure, and safe and convenient to use; a bugle ring, a connecting ring, a connecting rod, a circular ring, a positioning rod, a limiting plate, a vertical plate, a fixing plate and the hydraulic telescopic rod are arranged, so that the lifting of the clamping jaw can be facilitated, and the lifting difficulty of the clamping jaw is lowered; and meanwhile, the clamping jaw can be positioned, the positioning difficulty between the clamping jaw and the main shafts is reduced, and the drilling machining of a circular mold on the clamping jaw can be further facilitated.

The invention discloses a steel arch frame section moving and hoisting system and method for construction of an upper bearing type arch bridge. The system comprises a cable crane for hoisting arch frame splicing sections and an arch frame sectional transferring device for moving the arch frame splicing sections one by one; and the arch frame sectional transferring device comprises a splicing section moving device for horizontally moving the arch frame splicing sections one by one and a horizontal moving channel for horizontally moving the splicing section moving device, and the horizontal moving channel is arranged on a rear side beam section supporting structure. The method comprises the following steps of 1, constructing a bridge lower supporting structure; 2, constructing the cable crane and the arch frame sectional transferring device; and 3, assembling the steel arch frame. According to the system, the design is reasonable, the using effect is good, the arch frame sectional transferring device is used in cooperation with the cable crane, the arch frame sectional transferring device moves the arch frame splicing section to the hoisting region of the cable crane, the cable cranehoists the arch frame splicing section into place, and the steel arch frame assembling process can be simply and rapidly completed.

The invention discloses an oil pipe carrying device for oil reservoir engineering. The oil pipe carrying device comprises vertical columns, a top plate, a first fixed plate, a second fixed plate, connection plates, placing plates, plug pins, first motors, rotating wheels, digging ropes, fixed blocks, sliding blocks, guide plates, bearing plates, position-limiting blocks, hydraulic rods, supportingplates, idler wheels, second motors, gears, position-limiting plates, toothed plates, moving plates, guide rods, extending plates, second hydraulic rods and support plates. The oil pipe carrying device for the oil reservoir engineering is simple in structure and convenient to operate, short-distance carrying can be conveniently performed on oil pipes, inconvenience brought by needing to use transport vehicle carrying or manpower carrying is avoided, and the labor force is greatly reduced; the oil pipe carrying device can realize simultaneous storing of the multiple oil pipes through rotationand fixation of the placing plates, the transfer efficiency is improved when the carrying is performed, the operating time is reduced, and convenience is brought to the oil reservoir engineering; andby means of the arrangements of the support plates and the supporting plates, quick supporting can be performed on the oil pipes, operations are conveniently performed when oil pipe hoisting is performed, and the oil pipe hoisting difficulty is reduced.

The invention relates to a split-type hydraulic press rack comprising a first frame, a second frame, locating keys, a supporting leg, supporting leg anchoring parts, pull rods and pull rod anchoring parts; the first frame is vertically mounted on the top end of the supporting leg; one side of the first frame is provided with the locating keys; locating key holes are formed in one side of the second frame; the first frame is fitted with the second frame by fitting the locating keys with the locating key holes; and the first frame and the second frame are vertically fixed on the supporting leg by the supporting leg anchoring parts. By changing the structure of the split-type hydraulic press rack, the rack is not needed to be hoisted again after being assembled, so that the problem that an ultralarge hydraulic press rack cannot be wholly hoisted because of being ultraheavy is solved; and the whole hoisting of the rack is simplified to form only single frame hoisting, so that the hoisting difficulty is lowered, it is convenient for production staff to operate equipment, the production cost is reduced, the service life of the rack is prolonged, and the market prospect is wide.

The invention provides a vertical water turbine upper frame lifting device. The device comprises a base, a frame support column, a coiling mechanism, a transverse bracket, a lifting frame and fixtures; the frame support column is fixedly mounted on one side of the base; the transverse bracket is mounted above the frame support column, and is vertically connected with the frame support column; an electric block is connected under a free end of the transverse bracket; the lifting frame is connected under the electric block; multiple fixtures are uniformly mounted at the bottom of the lifting frame; the transverse bracket is provided with a slide rail in the length direction; an electric slide block is connected above the electric block; the electric slide block is mounted on the slide rail;and a hydraulic lifting rod is arranged between the frame support column and the transverse bracket. The device solves the difficulty of no special lifting tool for upper frames, greatly reduces the lifting difficulty of the upper frames, realizes stable lifting and mounting of the upper frames by using the lifting frame and the fixtures, eliminates potential safety hazards, shortens the maintenance period, and greatly saves the manpower and material resources.

The invention discloses a gear-rack bolt lifting system and a lifting method thereof. The gear-rack bolt lifting system is arranged on a pile leg in a sleeving way, and comprises a moving ring beam, alifting rack, a lifting unit, a lifting foundation and a bolt mechanism, wherein the lifting foundation is arranged on a deck of an offshore platform; the lifting unit is arranged on the lifting foundation; the bottom end of the lifting rack penetrates through the lifting foundation; and the lifting rack meshes with a lifting gear. The intermittent lifting of the offshore platform is realized; and compared with a hydraulic bolt lifting system, the average lifting speed is faster, the gear-rack bolt lifting system is stable and reliable, the use of a lifting oil cylinder easy to leak and difficult to maintain is avoided, the lifting efficiency is high, and the average lifting speed can reach to 30m / h. The lifting rack is arranged on the bottom part of the moving ring beam, and no pile fixing chamber and a fixed ring beam is needed to be used, so that the structure is simplified, the cost is greatly saved, and the lifting difficulty is reduced.

The invention provides a large-diameter long-pipe-segment circulating water pipeline crossing construction method which comprises the steps of cutting and blanking; excavating a welding pit, hoistinga steel outer sleeve pipe into a circulating water pipe ditch; fixing a support roller device on the outer wall of the front end of a first section of branched circulating water pipeline; hoisting thefirst section of branched circulating water pipeline into the circulating water pipe ditch, inserting the front end of the first section of branched circulating water pipeline into the steel outer sleeve pipe, utilizing a roller for supporting the front end of the first section of branched circulating water pipeline, and pushing the first section of branched circulating water pipeline to enter the steel outer sleeve pipe; hoisting a second section of branched circulating water pipeline into the circulating water pipe ditch, butt-welding the second section of branched circulating water pipeline and the first section of branched circulating water pipeline, and then pushing the second section of branched circulating water pipeline into the steel outer sleeve pipe; and installing rest branched circulating water pipelines in place according to a method in C3. According to the large-diameter long-pipe-segment circulating water pipeline crossing construction method provided by the invention,rolling friction replaces sliding friction, so that an outer anti-corrosion layer of a circulating water pipeline can be effectively prevented from being damaged; and in addition, the resistance of rolling friction is low, so that the construction can be carried out in an effort-saving way.

The invention relates to the technical field of architectural design and construction, and particularly discloses a truss type steel reinforced concrete beam with full bolted connection and a construction method. The truss type steel reinforced concrete beam comprises a concrete beam body and truss type profile steel arranged in the concrete beam body, wherein the truss type profile steel comprises first steel plates, second steel plates and connecting assemblies, and the connecting assemblies are connected to first webs of the first steel plates and second webs of the second steel plates. By adopting the way, since the profile steel in the truss type steel reinforced concrete beam is transformed from traditional integrated profile steel into the truss type profile steel which is formed by splicing the first steel plates, the second steel plates and the connecting assemblies, the truss type profile steel can be lifted in sections, the weight of the profile steel which needs to the lifted is effectively reduced, and the difficulty of lifting is reduced; and moreover, since the truss type profile steel is formed by connecting the first steel plates and the second steel plates through the connecting assemblies, the height of the truss type profile steel can be adjusted according to the height of the beam section so as to meet different use requirements.

The invention discloses a construction method of arch ribs of a deck type box arch bridge. The constructed deck type arch bridge comprises the two arch ribs which are symmetrically arranged on the left and right sides. During the construction of the arch ribs of the deck type arch bridge, the construction method comprises the following steps: (1) performing the construction of a lower supporting structure of the bridge; (2) performing the construction of the arch ribs. The process of the construction of the arch ribs comprises the steps of performing the construction of steel arch supports, mounting translation slideways and lifting devices, assembling a steel arch, lifting up an arched support frame, performing the construction of the earlier-construction arch rib, laying the arched support frame downward, mounting transverse-movement driving devices, transversely moving the arched support frame, lifting up the arched support frame, performing the construction of the later-construction arch rib, and removing the arched support frame. The construction method of the arch ribs of the deck type box arch bridge is reasonable in design, simple in construction and good in application effect. The two arch ribs are constructed one after the other by virtue of the steel arch, and the steel arch is supported and transversely moved by virtue of an arch supporting and transverse-movement device, so that the construction process of the two arch ribs can be completed simply and quickly. The construction process is safe and reliable. The construction efficiency of the deck type arch bridge can be effectively improved.

The invention discloses a climbing type scaffold and a climbing and mounting method thereof and a construction method of a fabricated building. The climbing type scaffold comprises anti-overturning supports arranged on a wall body in at least two rows, guide rails, a frame body, an upper lifting steel beam, a lower lifting steel beam, and an electric hoist; each row of supports comprise a plurality of anti-overturning supports longitudinally distributed along the wall body; the guide rails are embedded in each row of anti-overturning supports, and the guide rails ascend or descend relative to the anti-overturning supports; the frame body is arranged on the guide rails; the upper lifting steel beam is arranged on the wall body and is positioned at the upper end of the frame body; the lower lifting steel beam is arranged at the lower end of the frame body, and the lower lifting steel beam and the upper lifting steel beam are correspondingly arranged; and the electric hoist is arranged on the upper lifting steel beam, and a suspension wire of the electric hoist is connected to the lower lifting steel beam. According to the climbing type scaffold and the climbing and mounting method thereof and the construction method of the fabricated building, the lifting difficulty of the scaffold is reduced, the safety risk is reduced, the construction efficiency is improved, cracks generated at the joint between the frame body and the building structure are reduced, the construction quality is improved, and the cost is reduced.

The invention relates to a waggle-preventing device for a crane. The waggle-preventing device for the crane comprises an inhaul cable mechanism, a loading cable mechanism, a towing cable mechanism, aloading cable actuating device, a towing cable actuating device, a pulling block, a pulling block movable pulley and a loading pulley, wherein the loading cable mechanism comprises a loading cable fixed pulley, a loading cable pinch roller, a loading cable actuating device, a loading cable driving device and a loading cable; the towing cable mechanism comprises a towing cable driving device, a wing-shaped supporting rack, a towing cable, a towing cable pinch roller, a towing cable fixed pulley and a towing cable actuating device; the inhaul cable mechanism, the loading cable mechanism and thetowing cable mechanism jointly control the position of a weight in a space, and waggle of the weight is inhibited synchronously depend on a loading cable actuator and two towing cable actuators on thewing-shaped supporting rack. The waggle-preventing device for the crane provided by the invention is large in load and wide in hoisting spatial domain, can play a role of reducing waggle of the hoisted weight along the direction vertical to a lazy arm and the direction of the lazy arm quickly to a great extent, and can meet the demands in a long and narrow cargo placing environment.

The invention discloses an annular platform for bridge laying column construction and a construction method. The annular platform comprises a supporting ring base poured outside a laying column through an inserting rod, a plurality of supporting components are fixedly installed on the two sides of the supporting ring base correspondingly, the tops of the supporting components are rotatably connected with top platform components, a surrounding mechanism is fixedly installed in each top platform component through a light platform component, and the bottom of the surrounding mechanism is movably connected with one side of the corresponding supporting component. Through cooperation of extrusion rollers and triangular plates, the direction adjusting difficulty caused by the weight of the top platform components is reduced, and the angle adaptive steering capacity of an external assembly component is improved; the platform components can be limited and fixed in the deflection direction through insertion of clamping rods, so that the safety of construction is improved; the multi-axis expansion capacity in the annular direction is improved through multiple supporting bottom plates and platform side plates, extension assembly of an elevator frame and a supporting frame is facilitated, and the diversified expansion requirement of the construction platform is met.

The invention discloses a transport cart under a well, and belongs to the field of transport equipment under the well. The transport cart solves the technical problems and is short in distance from the ground, low in lifting and transporting difficulty and capable of providing convenience during carrying. In the technical scheme, the transport cart under the well comprises a cart hopper and a carthead connected with the cart hopper, wheels are arranged on the two sides of the rear of the cart hopper, the distance between the lower portion of the cart hopper and the ground is 20-30 cm, and a walking mechanism is arranged on the lower portion of the cart hopper. Since the distance between the lower portion of the cart hopper and the ground is short, lifting or carrying is convenient, and the structure is simple; the transport cart can be widely applied to the field of transport under the well.

The invention discloses a concrete vertical lifting device for chimney construction. The concrete vertical lifting device comprises a fixed hanging bracket, a fixed table, a first cantilever, a crawling ladder, a concrete piston pump and a third hydraulic driving device, a base is fixedly welded to the bottom of the fixed hanging bracket, and the base is fixedly installed on the upper surface of the ground through embedded bolts; and a plurality of extending hanging brackets are sequentially installed at the top of the fixed hanging bracket, and connecting sleeves are fixedly welded to the upper side in the fixed hanging bracket and the upper sides and the lower sides in the extending hanging brackets. The concrete vertical lifting device for chimney construction is provided with a sliding frame, a first rack and a first driving device, when the positions of the first cantilever and the second cantilever are adjusted, the first driving device is matched with the first rack to push a sliding table to slide along the sliding frame, the position of the balance weight can be conveniently adjusted in real time according to the operation state of the vertical concrete lifting device, the balance weight can be hoisted on a lifting hook, the balance weight effect is further improved, and the stability of the concrete vertical lifting device for chimney construction is greatly improved.

The invention provides a special-shaped joint pipe. The special-shaped joint pipe comprises a steel plate, a foam plate and strong adhesive, wherein the steel plate comprises a hollow part; the foam plate is fixed on the steel plate through the strong adhesive; and the steel plate comprises a lifting lug. According to the special-shaped joint pipe, a convex joint is formed by combining a hollow steel plate pile with the foam plate, so that a turbulent flow path is increased compared with an arc-shaped joint of a circular joint pipe, and therefore, anti-permeability is strengthened. The foam plate is used for replacing steel, so that manufacturing cost is reduced; meanwhile, weight of the whole joint pipe is reduced, so that perpendicularity can be controlled very well in a lowering process; and a contact area between the hollow steel plate and concrete is reduced compared with that of a circular locking hole pipe, so that holding force, on the joint pipe, of the concrete is reduced, difficulty in a pulling process is reduced, construction speed of a ground wall is increased to a certain extent, and a construction period is shortened.

The invention discloses a fixing piece for a deep-well pump and a lifting device comprising the fixing piece. The fixing piece for the deep-well pump comprises a hoisting fixture and limiting pieces;a clamping part and a hoisting part are arranged on the hoisting fixture; the clamping part is used for clamping a delivery lift pipe on the deep-well pump; the hoisting part is connected with a traction mechanism; and the limiting pieces are arranged on the hoisting fixture, and can make reciprocating motion along the hoisting fixture to get close to or far from the hoisting part, so as to seal or open the hoisting part. According to the fixing piece for the deep-well pump and the lifting device comprising the fixing piece, the deep-well pump is integrally hoisted away from an underground well, so that the lifting difficulty is lowered; and the deep-well pump is tightly connected with the hoisting fixture, so that the situation that the deep-well pump is unhooked from the hoisting fixturein the hoisting process is avoided and a safe working environment is provided for maintainers.

The present invention provides a waterproof lightweight type pulling rod case, which comprises a box, wherein a front row of rollers and a rear row of rollers are respectively arranged on the front side and the rear side below the box, the interior close to the rear side inside the box is provided with vertical gas cylinders symmetrically arranged on the left and the right, the middle portion of the gas cylinder is separated to form an upper portion gas cylinder and a lower portion gas cylinder, the uppermost end and the lowermost end of the upper portion gas cylinder are communicated to the uppermost end and the lowermost end of the lower portion gas cylinder respectively through a first gas pipe and a second gas pipe, the upper portion roller seat of the rear row of the rollers is connected to a wheel rod upwardly extending into the lower portion gas cylinder, an upper sliding plug is arranged in the upper portion gas cylinder and is connected to an upwardly extending pulling rod, a lower sliding plug is positioned at the upper end of the lower portion gas cylinder when the upper sliding plug is positioned at the lower end of the upper portion gas cylinder, and the upper sliding plug and the lower sliding plug always maintain reverse movement. According to the present invention, the pulling rod case can be normally pulled in the case of the water on the road surface, and the assisting function can be provided during the climbing of the steps.

The invention discloses a deck type arch bridge construction method based on a steel arch support. The constructed deck type arch bridge comprises a left arch rib and a right arch rib which are symmetrically arranged. When the constructed deck type arch bridge is constructed, the method comprises the steps of 1, constructing a bridge lower supporting structure; 2, constructing the arch ribs, wherein a steel arch support bearing is constructed, a translation sliding way and a lifting device are installed, the steel arch support is assembled, an arch supporting frame is jacked, the arch ribs areconstructed at first, the arch supporting frame is placed down, a translation drive device is installed, the arch supporting frame is moved transversely, the arch supporting frame is jacked, and post-construction arch ribs are constructed; 3, performing follow-up construction. The deck type arch bridge is reasonable in design, easy and convenient to construct and good in using effect; the steel arch support is adopted for constructing the arch ribs in success, an arch support bracket and the translation device are adopted for supporting and transversely moving the steel arch support, the construction process of the two arch ribs can be easily, conveniently and rapidly completed, the construction process is safe and reliable, and the construction efficiency of the deck type arch bridge canbe effectively improved.

The invention discloses a lifting platform for lifting a large-span high-altitude corridor truss. The lifting platform comprises supporting steel plates, a reinforced concrete pier is arranged at thetop surface of a building, and a ground anchor steel plate is embedded in the reinforced concrete pier. Seismic isolation supports are arranged on the supporting steel plates, and an end truss is located on the seismic isolation supports. A cross beam at the rear end of the end truss is connected with the ground anchor steel plate through a ground anchor tie rod. Hoisting platforms are separatelyinstalled on both sides of the top of the end truss. The hoisting platforms include support columns, and the bottom ends of the support columns and stand columns on both sides of the front end of theend truss are connected in a welded mode. The rear sides of the top ends of the support columns are connected with the cross beam at the rear end of the end truss in a welded mode through diagonal tierods. Horizontal suspension beams are welded to the front sides of the top ends of the support columns, and the bottoms of the horizontal suspension beams are connected with the bottoms of stand columns on the front side of the end truss in a welded mode through support rods. The inner sides of the horizontal suspension beams are connected with the middle part of a cross beam at the top of the end truss in a welded mode through diagonal ligaments. The lifting platform has good stability, can reduce the total weight of lifting, reduces the difficulty of lifting, and facilitates the butt jointafter lifting. The lifting platform is convenient to erect and dismantle, and is beneficial to controlling the construction cost.