118results about How to "Guarantee smooth construction" patented technology

The invention relates to the technical field of raw material management systems, in particular to a raw material management system for building engineering construction. The management system comprises a raw material information management module, a purchase management module, an inventory management module, a use management module, an optimization allocation module, a raw material quality evaluation module, an environmental impact evaluation and material selection module, a supply chain transparency module, a life cycle management module and a raw material demand prediction and inventory optimization module. An automatic purchase and supplier collaborative optimization module; the system uniformly manages data information of links of raw material purchasing, inventory, use and the like through a centralized data platform, forms a complete material management chain, avoids information dispersion and lag, realizes real-time sharing of data of each link, improves transparency of management and accuracy of decision making, and meanwhile, greatly improves management efficiency. The complexity and error rate of manual operation can be remarkably reduced through automatic purchase order generation, intelligent inventory management and supplier collaboration.

The invention relates to a ring structure betaine and double-tailed hydrophobic association polymer fracturing thickening agent and a preparation method thereof. The thickening agent is formed by copolymerization of four monomers, namely acrylamide, 2-allyl methylamino sodium ethanesulfonate, methyl diallyl sulfoethyl betaine and hydrophobic monomer double-tailed long-chain alkyl methyl allyl ammonium chloride. The preparation method comprises the following steps: firstly adding distilled water, then sequentially adding acrylamide, 2-allyl methylamino sodium ethanesulfonate, methyl diallyl sulfoethyl betaine and a hydrophobic monomer double-tailed long-chain alkyl methyl allyl ammonium chloride, adjusting the total concentration, introducing N2 to remove oxygen, adding an initiator, and reacting to prepare an AM / AMES / MDASBA / DCnMAAC quadripolymer, namely the polymer fracturing thickening agent. The thickening agent provided by the invention has good water solubility, and shows good salt resistance in mixed brine with the mineralization degree of greater than or equal to 30000 mg / L. The prepared linear solution and gel formed after crosslinking have high viscosity retention capacity at the temperature of 150 DEG C and the shearing rate of 170 s <-1 >, and the actual construction requirement for fracturing yield increase with the on-site mineralization degree larger than or equal to 30000 mg / L is met.

The invention relates to the technical field of concrete preparation, in particular to moisturizing anti-cracking high-ductility concrete and a preparation method thereof. The moisturizing anti-cracking high-ductility concrete is prepared from the following components: 350 to 450 parts of ordinary Portland cement, 200 to 300 parts of fly ash, 30 to 50 parts of silica fume, 250 to 350 parts of quartz sand, 0.5 to 1 part of a water reducing agent, 10 to 20 parts of an expanding agent, 0.1 to 0.3 part of a retarder, 0.5 to 1 part of a thixotropic lubricant, 0.2 to 0.7 part of a modified nano material, 0.7 to 3 parts of a modified composite curing agent, 5 to 10 parts of an anti-cracking agent, 5 to 12 parts of polymer fiber and 180 to 220 parts of water. The high-moisture-retention high-water-retention concrete has the characteristics of high moisture retention and high water retention, is beneficial to maintaining the internal humidity balance, reducing cracks generated by drying shrinkage, improving the durability of the concrete, and remarkably reducing the cracking risk of the concrete in the hardening process, so that the concrete structure is more complete, the safety of the structure is improved, and the service life of the structure is prolonged.

The invention provides a crane hook target motion trail control system and a control method thereof.The crane hook target motion trail control system comprises a pressure control system, a winch system, a power source system and a sensing system.The pressure control system is used for monitoring the state of a clutch, controlling the winch speed of the winch clutch and feeding back pressure data in real time; one end of the winch system is connected with the pressure control system, and the other end of the winch system is connected with the power source system; the power source system is connected with the winch system and is used for providing power for the operation of the crane hook; the sensing system is connected with the controller through a signal transmission line and used for detecting pressure and rotating speed data in the operation process of the lifting hook and transmitting the pressure and rotating speed data to the controller for analysis. According to the invention, speed trajectory path planning and preventive real-time control can be carried out when the crawler crane does a free hook falling working condition, so that stable braking can be realized when the lifting hook lifts different weights of loads, and a winding drum can be effectively braked.

The invention discloses an intelligent beam field construction management system based on BIM and GIS, and relates to the technical field of beam field construction management. Main parameters of a beam field construction environment can be fully covered by deploying a temperature and humidity sensor, an air quality sensor, a noise sensor, a wind speed and direction sensor and a rainfall sensor; spatial data association is performed on the BIM model by using a spatial analysis tool in a GIS platform, geographic information and construction in the BIM model are subjected to geographic space matching, and the accuracy of an association result is ensured through verification, so that data integration and sharing are facilitated, the use efficiency of the data is improved, and the method is suitable for popularization and application. A construction supervisor can monitor the construction progress according to the tracking data recorded in real time, a construction plan is adjusted in time, and smooth construction is ensured.

The invention relates to a betaine type double-tailed hydrophobic association polymer fracturing thickening agent and a preparation method thereof. The thickening agent is prepared by the following steps: copolymerizing four monomers, namely acrylamide, 2-allyl methylamino sodium ethanesulfonate, methyl diallyl hydroxypropyl sulfobetaine and double-tailed long-chain alkyl allyl sulfoethyl betaine to form gel, chopping, hydrolyzing, neutralizing and purifying. The preparation method comprises the following steps: firstly adding distilled water, adding acrylamide, 2-allylmethylamino sodium ethanesulfonate, methyldiallyl hydroxypropyl sulfobetaine and other remaining raw materials, adjusting the total concentration, introducing N2 to remove oxygen, adding an initiator, reacting to prepare gel, chopping the gel, and hydrolyzing to obtain the water-soluble polymer. The fracturing thickening agent has good water solubility and shows good salt resistance in mixed saline water with the mineralization degree larger than or equal to 30000 mg / L, a prepared linear solution and jelly formed after crosslinking have high viscosity retention capacity at the temperature of 150 DEG C and the shearing rate of 170 s <-1 >, and the actual construction requirement for fracturing yield increase with the on-site mineralization degree larger than or equal to 30000 mg / L is met.

The invention provides a karst tunneling method and related equipment, and the method comprises the steps: carrying out the information extraction according to the obtained line plane and longitudinal plane data of a target region, the mileage of a current tunnel face, and a geological radar interpretation map, and obtaining the three-dimensional space coordinates of all vertexes on the geometric boundary of a karst region, so as to obtain a longest axis of the center of gravity; rotating the geometric boundary by taking the axis with the longest center of gravity as a rotating axis to form a three-dimensional boundary of the karst area; a three-dimensional karst cave model under the geodetic coordinate system is generated through the three-dimensional space coordinates of the vertexes on the geometric boundary and the three-dimensional boundary of the karst area, karst area treatment measures are subjected to animation production and then imported into a U3d file to be bound with the three-dimensional karst cave model, and a U3d project file is obtained; performing animation display on the U3d project file on the tunnel face of the target area through mixed reality, and performing karst tunneling according to the animation display condition; and the construction safety problem caused by karst collapse and underground water inrush in the tunnel construction tunneling process can be effectively prevented.

The invention belongs to the technical field of engineering project material intelligent distribution management, and discloses an intelligent building material distribution management system, which comprises a monitoring area division module, a construction progress analysis module, a material demand identification module, a distribution route planning module, a distribution sequence planning module, a distribution process monitoring module and a distribution abnormity identification module. Whether material distribution needs to be carried out or not is judged based on the construction progress of each construction unit, smooth construction can be guaranteed through the analysis mode, material supply and construction requirements can be accurately matched, resource allocation is greatly optimized, and inventory overstock is reduced. According to the invention, during material distribution, the abnormal material weight condition and the abnormal equipment operation condition in the material distribution process corresponding to each target construction unit are analyzed, whether the material distribution process corresponding to each target construction unit is abnormal is judged, the weight abnormity can be accurately identified, the material allocation can be optimized, the supply and demand balance is ensured, and the material distribution efficiency is improved. Stock overstock and waste are reduced, and cost is reduced.

The invention belongs to the technical field of railway foundation pit construction safety monitoring, and discloses an intelligent monitoring and analyzing system for railway construction safety. Comprising a supporting structure safety analysis module, a geologic structure safety analysis module, a self-structure safety analysis module, an external factor data analysis module, a foundation pit safety problem identification module, an influence area data acquisition module and an influence area abnormity identification module. According to the method, the structure safety is comprehensively evaluated by integrating the supporting structure safety, the geologic structure safety and the self structure safety, and meanwhile, the abnormal conditions of external factors of the target foundation pit are analyzed by monitoring other behaviors influencing railway driving; the invention further relates to monitoring of construction equipment in the possible influence area of the target foundation pit, and further analysis of the construction safety abnormal condition of the influence area of the target foundation pit, so that the foundation pit construction safety management level and the overall construction efficiency are improved, smooth foundation pit construction is effectively guaranteed, and potential risk hazards are reduced.

The invention discloses a jacking pipe joint stress monitoring method based on a mechanoluminescent material. The jacking pipe joint stress monitoring method comprises the following steps: step A, obtaining a stress-wavelength curve graph of the mechanoluminescent material; step B, spraying a mechanoluminescent material on the inner wall of the pipe joint along the circumferential direction; and C, in the pipe jacking construction process, the wavelength of light emitted by the mechanoluminescent material on the inner wall of the pipe joint is collected and analyzed, and the stress size corresponding to the wavelength of the light is determined in combination with the stress-wavelength curve graph obtained in the step A. In the jacking process of the pipe joint, the mechanoluminescent material can emit light due to stress, the wavelength of light emitted by the mechanoluminescent material on the inner wall of the pipe joint is collected and analyzed by means of an optical analysis system, data are transmitted to a computer, and the stress corresponding to the wavelength of light can be determined by combining a stress-wavelength curve graph obtained previously. According to the method, the stress state of each position of the pipe joint is judged, the stress of the pipe joint in the jacking process is monitored, the error is small, and the pipe clamping position can be rapidly determined.

The invention discloses a railway tunnel intelligent construction method and system based on axial plane collaboration, and relates to the technical field of railway tunnel construction.The method comprises the steps that geological exploration data and tunnel face and drilling data of a construction area are collected, and a geological model is established; determining stratum characteristics based on the field data, and reconstructing a geologic body through a Monte Carlo simulation method; geological information and drilling data in the reconstructed geologic body are verified, and a reconstructed reference image is generated; repairing the image by means of an AI model until a reconstruction requirement is met, and generating a blasting section reconstruction geology; finally, according to the reconstructed geology and geologic model, a blasting construction scheme is formulated, and automatic operation of construction machinery is guided. According to the method, the geological exploration data and the tunnel face and drilling data are utilized to predict and complement the front stratum geology, so that the blasting and construction design is more reasonable.

The utility model relates to the technical field of building curtain walls, and discloses a hoisting device for building curtain wall construction, which comprises a placing frame, a door plate hinged on one side of the placing frame, a building curtain wall placing groove arranged on the inner side of the placing frame, a fixed arm fixed on the top of the placing frame, a hoisting ring fixed on the top of the fixed arm, and a warning lamp arranged on one side of the fixed arm. Through holes are formed in one side of the containing frame and one side of the door plate, a buffering assembly is arranged on one side of the containing frame, a push plate is pushed through the elastic force of a first spring connected to the outer side of a sliding rod in a sleeving mode to clamp the building curtain wall, and the situation that when the building curtain wall shakes at will in the lifting process and the impact force is large, the push plate abuts against a contact of a switch at the moment is prevented; when the building curtain wall is hoisted, the warning lamp generates sound and light prompts, so that a worker can be actively informed that the building curtain wall is subjected to large external force impact during hoisting and needs to be checked, potential safety hazards can be found and treated in time, and smooth construction can be ensured.

The invention discloses a shield construction method for a sand-pebble stratum tunnel, comprising the following steps: reinforcing an end portal and installing a starting bracket; installing a reaction frame support system; installing the shield in slag, extending a portal steel ring and a seal, optimizing shield excavation parameters, measuring and adjusting the shield, etc., thereby ensuring that the shield construction is safe, smooth and fast, and achieving an ideal working condition when the shield is excavating in the sand-pebble stratum.

The invention discloses an environment-friendly polyurethane adhesive which comprises a component A and a component B. The component A is prepared from the following raw materials in parts by weight: 10-50 parts of vegetable oil, 5-30 parts of polyether polyol, 0.1-0.5 part of a chain extender, 40-70 parts of solid filler, 0.1-1 part of an auxiliary agent and 5-20 parts of an adsorbent. And the component B comprises a curing agent. According to the environment-friendly adhesive, the polyether polyol with the hydroxyl value of 270-290 mgKOH / g, the viscosity of 40-140 mPa.s at the temperature of 25 DEG C and the K < + > value content smaller than or equal to 3 ppm is adopted, and the environment-friendly adhesive can have long-term tensile shear strength and peel strength. The epoxy group-containing silane coupling agent 3-glycidyl ether oxypropyl trimethoxy silane is adopted, so that the service life of the polyurethane adhesive can be prolonged, the influence of external environment humidity on the adhesive is avoided, and the long-term peel strength and tensile shear strength of the adhesive are maintained.

The utility model relates to the technical field of water conservancy construction, and discloses a river channel intercepting device for water conservancy construction, which comprises an intercepting table, the intercepting table is of a concave structure, a front intercepting mechanism and a rear intercepting mechanism are arranged on the intercepting table, and each intercepting mechanism comprises a first intercepting assembly and a second intercepting assembly. The first intercepting assembly comprises a first intercepting baffle and water flow holes transversely formed in the two sides of the first intercepting baffle, a flow limiting cavity is formed in the top of the first intercepting baffle, and a semi-cylindrical rotating shaft column is rotationally arranged in the flow limiting cavity; according to the utility model, due to the arrangement of the water flow hole transversely formed in the first intercepting baffle and the flow limiting cavities, the flow of water flowing through the space between the two flow limiting cavities can be accurately controlled through the control of the rotating shaft column and the motor, and the accurate adjustment and control of the water flow are realized; the first closure assembly is designed to adapt to different water flow conditions, the water flow is adjusted by controlling the rotating shaft column, and the device is suitable for different water conservancy construction scenes.

The invention relates to the technical field of building construction, and discloses a deep foundation pit single-side formwork structure and a construction technology, and the deep foundation pit single-side formwork structure comprises a deep foundation pit body, a cement pouring slope poured on the deep foundation pit body, a formwork foundation poured on the outer surface of the deep foundation pit body, and a cement pouring formwork fixedly installed on the formwork foundation. And a plurality of positioning columns which are distributed at equal intervals are fixedly mounted on the outer surface of the cement pouring inclined plane. According to the deep foundation pit single-side formwork supporting structure and the construction technology, through the design of the bottom moving wheels, the position of the formwork supporting frame can be adjusted more flexibly in the installation process, the installation efficiency and convenience of the whole formwork supporting structure are improved, the first connecting steel frame and the second connecting steel frame in the formwork supporting assembly are connected through the connecting bolts and the limiting sleeves, assembling and disassembling are convenient, and the construction cost is reduced. And flexible adjustment can be achieved according to actual construction requirements, inclined rod connection is achieved through cooperation of a first connecting base, a second connecting base, a bolt rod, a first limiting groove and a second limiting groove in the connecting assembly, and the construction efficiency is improved.

The present application relates to high pier construction technical field, specifically a kind of roller mould device for high pier construction, including main mould frame, several equipment supports being arranged on main mould frame, rolling device being arranged on equipment support;Rolling device includes the roller body assembly being arranged in the front of rolling device, and the recovery assembly being arranged in the rear of roller body assembly;Roller body assembly includes support frame, roller body being arranged on support frame, and the material scraping frame being erected on support frame;Material scraping frame is provided with material scraping machine piece, material scraping machine piece is inclined to the roller surface of roller body, and the side of roller body is moved towards material scraping machine piece;Recovery assembly includes the material receiving box being arranged in the rear of material scraping frame, the rear of material scraping frame is provided with guide frame plate, and guide frame plate is used to connect material receiving box and material scraping machine piece.The present application designs material scraping machine piece to separate the concrete on the roller surface of roller body, and concrete is collected in time, so that the construction process of overall high pier roller mould is more smooth.

The invention relates to the technical field of submerged dike construction, in particular to a fine placement construction process for an accropode group under large water depth. The construction method comprises the following steps: S1, construction preparation: prefabricating an accropode group, and transporting the accropode group to a construction site; s2, underwater measurement and positioning: measuring the underwater topography to obtain underwater topography data, and arranging a positioning system; s3, hoisting: performing real-time monitoring and position adjustment by using an underwater visual monitoring system, and accurately sinking the accropode group to a preset position; s4, checking after sinking: collecting sinking data of the accropode group, and carrying out quality checking; s5, adjusting the sinking position: correcting the position according to the inspection result to ensure the stability of the accropode; according to the technology, by comprehensively applying high-precision positioning, real-time monitoring and intelligent adjusting technologies, the hoisting precision and construction efficiency of the accropode group in the large water depth environment are remarkably improved, and the quality problem caused by position deviation is effectively solved.

The present invention relates to the technical field of lining with building materials, and discloses a method for constructing an underground cavern lining that passes through existing waste piles. The method first performs grouting around the waste piles to form a pile-holding tube, and then integrates the waste piles with a portion of the lining grid into a ring structure that supports the underground cavern according to the different positions of the waste piles. This not only ensures that the ground at the waste pile positions will not sink, but also enables the lining at the positions where the waste piles interfere to form a ring to resist the formation pressure. After the first lining construction is completed, the portion of the waste piles located in the underground cavern is removed. At this time, due to the grip of the pile-holding tube and the support of the first lining, the waste piles will not sink after being broken, and the lining portion that does not form a ring due to the removal of the waste piles will not affect the support effect, so that the portion that does not form a ring in the first lining can be easily supplemented and the construction of the second lining can continue. The above content ensures that the lining is smoothly constructed without causing settlement.

The BIM-based pipeline comprehensive support comprises a base plate fixed to a wall surface, a plurality of fixing mechanisms are fixed to the base plate, each fixing mechanism comprises a main supporting pipe fixedly connected to the base plate, and an adjusting screw rod is slidably arranged in each main supporting pipe; the ends, away from the base plate, of the adjusting screws are fixedly connected with clamp assemblies used for fixing the pipelines, and the pipelines correspond to clamps one to one. The pipeline collecting and arranging device has the effect that pipelines can be collected and arranged more neatly.

The utility model relates to a positioning device for a drainage blind pipe of a tunnel side wall. An existing side wall drainage blind pipe construction method has the problem that the installation quality is difficult to guarantee. The device comprises a blind pipe positioning clamp and an orifice sealing pipe, the blind pipe positioning clamp is of a tubular structure and located at the preset position of the side wall drainage blind pipe within the side wall lining pouring range, and the side wall drainage blind pipe is inserted into the blind pipe positioning clamp and extends into the outer side of the side wall lining pouring range. And the orifice sealing pipe is inserted into the side wall drainage blind pipe from the inner end of the blind pipe positioning clamp. The blind pipe positioning clamp is used for positioning the side wall drainage blind pipe, a traditional simple positioning mode is replaced, so that the installation quality such as slope and orifice elevation control of the side wall drainage blind pipe is guaranteed, welding operation of site positioning steel bars and damage to a side wall arc-shaped formwork are reduced, electric welding sparks are reduced in gas tunnel construction, and the construction efficiency is improved. The safety risk is reduced, meanwhile, the time of the blind pipe positioning procedure is shortened, and the operation cost is reduced.

The utility model relates to an intelligent slip form machine for a road shoulder, and belongs to the technical field of road and bridge construction machinery. Comprising a rack with walking wheels, and a discharging bin and a slip form forming plate which are arranged on the rack; the discharging bin is arranged at the front end of the advancing direction of the rack, and a plurality of vibrating rods are arranged in the discharging bin; the slip form forming plate is correspondingly arranged behind a discharging port in the lower end of the discharging bin, so that concrete materials enter the slip form forming plate from the lower end of the discharging bin. And liftable slurry baffles are arranged on the two sides of the slip form forming plate. The machine is positioned using an RTK control system. The utility model relates to an intelligent road shoulder slip form machine which can be suitable for construction of road shoulders and guardrail bases, can achieve one-time slip form forming construction of concrete materials, achieves intelligent and mechanical construction of the road shoulders and the guardrail bases, and improves construction efficiency and construction quality.

The utility model discloses a device for preventing an electric power tube bank from floating during pouring, and relates to the technical field of electric power construction. The device comprises a groove, a formwork is fixedly connected to the inner bottom wall of the groove, a plurality of first mounting grooves are formed in the inner bottom wall of the formwork at equal intervals, a power calandria body is arranged in the first mounting grooves, a first connecting plate is arranged above the power calandria body, and a plurality of second mounting grooves are formed in the two sides of the first connecting plate at equal intervals; a second connecting plate is arranged above the first connecting plate, a plurality of third mounting grooves are formed in the bottom of the second connecting plate at equal intervals, a pressing mechanism is arranged above the electric power calandria body, and a handle is rotated to drive an abutting plate to clamp and fix the two faces of a pressure block, so that the risk that one end of the electric power calandria body is tilted and staggered during concrete pouring is reduced; therefore, the construction quality of the electric power calandria body is guaranteed, the risk of waste of manual equipment and materials caused by secondary reinforcement of the calandria is reduced, and the construction cost is reduced.

The invention provides a method for repairing cracks of a carborundum floor, and relates to the technical field of floor repairing. The repairing method comprises the following steps that S1, the surface of the carborundum floor is cleaned, and the position of a crack is determined and marked; s2, cutting the crack at the ground mark to form a V-shaped notch; s3, putty and a curing agent are selected to manufacture a filling material, and the putty and the curing agent are blended according to the mass ratio of 100: (1.5-3); s4, the V-shaped notch is filled with the blended filling material, and the V-shaped notch is scraped to be flat; s5, forming a filling layer after the filling material of the V-shaped notch is completely dried, and polishing the surface of the filling layer; and S6, epoxy paint with the same color as the carborundum floor is selected and sprayed to the surface of the filling layer. According to the repairing method, the problems that traditional anti-crack mortar is prone to cracking, serious in color difference, poor in impression and the like after repairing are effectively solved, and a reliable and efficient solution is provided for repairing the carborundum terrace.

The invention discloses a system for reducing the temperature of aggregate in a material yard of a mixing plant by using ice water spray, the system comprises a spraying module and a monitoring module, the spraying module is used for spraying and cooling the aggregate, and the monitoring module is used for monitoring the temperature of an aggregate pile in the material yard; the spraying module is arranged in the stock yard, the spraying module comprises a settling pond, a water pond and a spraying module, the settling pond is communicated with the water pond through a pipeline, the spraying module is arranged above the stock yard, the water pond is communicated with the spraying module through a water pipe, the monitoring module comprises an infrared temperature probe, and the infrared temperature probe is arranged at the top of the stock yard. According to the invention, ice cubes are put into the spraying water tank, so that the temperature of spraying water is greatly reduced, the temperature of aggregate can be quickly and efficiently reduced, the used spraying water is saved, and meanwhile, the recycled water of the three-stage sedimentation tank is used for cooling, so that the consumption of water resources is saved again.

The application relates to the technical field of bridge erecting machine construction, in particular to a bridge erecting machine and a construction method thereof. The bridge erecting machine comprises a main beam, the longitudinal ends of the main beam are respectively provided with a front guide beam and a rear guide beam, the front guide beam and / or the rear guide beam comprises a plurality of jointed assembling units, and any two adjacent jointed assembling units are detachably connected; a main crane is movably arranged on at least one of the main beam, the front guide beam and the rear guide beam; a plurality of groups of hanging devices are movably connected to the main crane and are selectively hung on the main beam, the other ends of the hanging devices are fixedly connected with segment beams, and any group of the hanging devices is adapted to be cross-layer hung with adjacent hanging devices so that the segment beams are arranged in a staggered mode along the height direction; and the main crane is adapted to drive the hanging devices to move longitudinally, transversely, vertically or rotate. The bridge erecting machine can be used to successfully complete the erection of a bridge in a narrow construction site with obstacles at the bridge head.

The utility model relates to a transverse supporting system, and belongs to the technical field of formwork supporting, in particular to a reinforced aluminum alloy formwork splicing transverse supporting system which comprises a plurality of pairs of U-shaped steel, an aluminum alloy formwork is fixedly installed on the groove side of each U-shaped steel, and steel plates are fixedly installed on the two sides of each U-shaped steel through bolts. A plurality of transverse supporting plates are arranged on the outer sides of each pair of aluminum alloy formworks; the utility model achieves the effects of improving the stability and the construction efficiency of a template system and ensuring the construction quality and safety, and solves the problems that although the stable supporting effect can be realized in the prior art, a single supporting mode is similar to a common construction mode, the supporting effect is poor, and the construction cost is low. And adjustment according to the height and the length of the template is not facilitated.

The utility model relates to the technical field of track equipment, and discloses a track short-circuit copper conductor mounting device, which comprises a pair of buckles which are used for being meshed on two sides of a single track and are adjustable in relative position, and the relative position of the pair of buckles is controlled by an adjusting mechanism; the adjusting mechanism comprises a rack arranged on one buckle and a pushing mechanism which is arranged on the other buckle and operates on the rack to push the buckle to move. According to the rail short-circuit copper wire installation device, the novel two-side occlusion buckles are adopted, the adjustment mechanism controls the occlusion position and the occlusion tightness, operation is more convenient, installation is quite stable, and smooth construction can be more effectively guaranteed.

A return towing head for directional synchronous crossing of a main pipeline and an outer casing, relating to the field of pipeline crossing technology, includes an outer casing, a main pipeline, and a return towing head. Reinforcing plates are welded to the outer wall of the outer casing at equal intervals along the circumference. The return towing head includes a main body, with tie rods evenly spaced along the circumference at the ends of the main body. The tie rods can extend between two reinforcing plates, and a limiting plate is provided at the end of the tie rod. When the outer casing and the return towing head need to connect, the limiting plate is placed horizontally on the reinforcing plates on both sides, thus forming an effective connection. A central cylinder is provided inside the main body, and a top block is slidably mounted radially upward on the central cylinder. One end of the top block can abut against the inner wall of the main pipeline. A drag rod is slidably mounted axially upward on the central cylinder, and the drag rod has a conical portion. The other end of the top block can abut against the conical portion of the drag rod. When the drag rod is dragged outward, the conical portion pushes the top block out and presses it tightly against the inner wall of the main pipeline. Thus, this application achieves synchronous dragging of the outer casing and the main pipeline by the return towing head.

This utility model relates to the field of engineering machinery technology, providing a split-type power supply device and an excavator. The split-type power supply device includes: a fixed base and an assembly base; the fixed base is configured to be fixed to the excavator, and the fixed base has a first inner cavity and a cable inlet communicating with the first inner cavity; the assembly base is detachably connected to the fixed base, and the assembly base has a second inner cavity and a cable outlet communicating with the second inner cavity; the first inner cavity and the second inner cavity are sequentially connected to form a channel for external cables to pass through. This utility model's split-type power supply device, by fixing the fixed base to the excavator and detachably connecting the fixed base and the assembly base to form a complete support structure, provides support and protection for external cables; at the same time, the fixed base and the assembly base can be disassembled, allowing construction personnel to disassemble, assemble, and replace the assembly base according to the on-site working conditions, avoiding any impact on construction operations and making construction operations smoother.