51results about How to "Improve ergonomics" patented technology

The utility model provides a kind of formwork for station internal stand column diameter expansion construction, including steel hoop assembly and wooden formwork assembly;The wooden formwork assembly includes two semicircular templates, and two semicircular templates are formed into a whole circle by surrounding and splicing;The template includes melamine board layer, plywood layer, support batten layer and assembled batten layer from inside to outside in turn;The melamine board layer and plywood layer are fixed by adhesive method, for making the template inner surface even;The support batten layer is arranged around the outer periphery of the plywood layer by adhesive method, for whole circle support;The assembled batten layer is wrapped outside support batten layer for constraining the overall shape of the template;The steel hoop assembly includes a pair of semicircular steel hoops arranged in pairs, a pair of semicircular steel hoops are used for locking outside wooden formwork assembly, and each steel hoop assembly is arranged equidistantly along the length direction of wooden formwork assembly.The template has the advantages of improving construction efficiency and ensuring the appearance quality after stand column diameter expansion.

This utility model relates to a quick-release formwork support for large-span prestressed concrete beams, comprising: multiple bases arranged side-by-side on a hardened ground; multiple vertically distributed columns on each base; a top support on each column; a connecting plate fixed vertically at four equidistant angles on the side of each column; multiple bolt holes vertically formed on each connecting plate; two horizontal braces and diagonal braces, each bolted to the connecting plates on the sides of two adjacent columns on the same base; and two horizontal braces and diagonal braces, each bolted to the connecting plates on the sides of two adjacent columns on the same row between two adjacent bases. The advantages are: the bolted connection facilitates rapid assembly and disassembly, resulting in high efficiency; the horizontal and diagonal braces connect the columns into a whole, ensuring stability.

The invention provides a stirring structure and a fluidized stabilized soil pulping station. The stirring structure comprises a stirring frame, a stirring cavity fixedly arranged on the stirring frame, a stirring assembly rotationally arranged in the stirring cavity, a first driving mechanism for driving the stirring assembly to rotate, and a second driving mechanism for driving the stirring assembly to be separated from the stirring cavity; the stirring assembly comprises a stirring cavity and a stirring assembly, the stirring cavity is provided with a hemispherical bottom surface, the stirring assembly comprises a stirring shaft and a hollow hemispherical stirring part which is concentrically and fixedly connected with the stirring shaft and matched with the hemispherical bottom surface, and a plurality of filtering holes are formed in the stirring part. And the grinding action is realized in the pulping process by matching the spherical surface, so that the particle size is smaller, and mud and water are more uniformly mixed.

The application relates to the technical field of industrial waste gas purification, and discloses an activated carbon adsorption industrial volatile gas purification equipment, which comprises an industrial volatile gas purification cabinet, a partition plate is fixedly installed in the industrial volatile gas purification cabinet, a waste gas inlet pipe located below the partition plate is fixedly communicated with the left side of the industrial volatile gas purification cabinet, two volatile gas purification treatment boxes located above the partition plate are fixedly installed in the industrial volatile gas purification cabinet, and the sides, away from each other, of the two volatile gas purification treatment boxes both extend to the outside of the industrial volatile gas purification cabinet. The application has the following advantages and effects: the two volatile gas purification treatment boxes are alternately used to comprehensively and efficiently adsorb and purify volatile gas in industrial waste gas, the activated carbon particles in the volatile gas purification treatment boxes can be replaced without stopping the machine, the work efficiency is improved, and the continuity of industrial production and waste gas purification treatment is ensured.

The utility model provides a cable bridge modular structure connecting and installing device in an electrical vertical shaft, which comprises a frame body, the frame body is of a hollow structure, the size of the frame body is matched with the size of a reserved hole for a cable bridge to penetrate through, and the frame body is provided with a connecting hole; the connecting lugs are arranged around the outer wall of the frame body, the connecting lugs are located on the same plane, and at least one through hole is formed in each connecting lug; and the first fastener is used for penetrating through the through hole to be connected with the floor template. The device is easy to install, after the device is installed, concrete can be poured on a floor formwork, after the concrete is solidified, the device can form a reserved hole without being disassembled, the construction process is simple, the construction technical difficulty is reduced, the processes of secondary formwork erecting, fireproof blocking, root closing-up and the like of the cable bridge are omitted, and the construction efficiency is improved. The construction cost is reduced, and the work efficiency is improved.

An integrated assembly finishing forming tool for left and right foot air duct components of an automobile, first and third supporting plates (9) and (11) are respectively arranged at the top surface of the workbench (1) at both ends, and the second supporting plate (10) is arranged at the middle of the top surface of the workbench (1); according to the extension direction of the two components of the product (1), the product is supported by multiple flat seat cavities, manual loading and unloading, multiple tool clamps, punching punches and cutting tools are driven by multiple cylinders to execute processing actions in coordination, and each station is coordinated to complete cutting, punching or pressing shaping, so that the foot air duct components can be conveniently, safely, orderly and efficiently assembled. Manual assistance, semi-automatic working mode is adopted to complete component finishing assembly, clamping and fixing force is balanced, product sliding is prevented, and component accidental damage is avoided. Compared with pure manual assembly, work efficiency and yield are significantly improved; compared with fully automatic assembly equipment, it is simple, easy, economical and practical; the assembly quality and efficiency between the upper and lower shells of the foot air duct are improved.

This utility model discloses a lawnmower with a telescopic structure, including a lawnmower and a first handle connected to the lawnmower; the first handle is provided with a second handle that can be telescopically extended; the second handle is provided with a sliding sleeve that is slidably connected to the first handle, and the sliding sleeve is provided with a locking pin; the first handle is provided with a locking hole group that cooperates with the locking pin in the axial direction, and the locking hole group is arranged in several groups around the circumference of the first handle; this utility model can drive the locking pin to disengage from the locking hole group by rotating the second grip, realizing quick unlocking with one hand, significantly simplifying the adjustment steps of the handle length and angle, and greatly improving the operating efficiency.

This invention belongs to the field of exterior wall construction technology, specifically relating to an adjustable leveling installation system and method for integrated thermal insulation and decorative panels for building exterior walls. The system includes an integrated panel fixing and positioning mechanism and an auxiliary positioning mechanism. The integrated panel fixing and positioning mechanism includes a clamping unit for clamping the integrated thermal insulation and decorative panel and a detection unit for detecting the position of the integrated thermal insulation and decorative panel. The auxiliary positioning mechanism works in conjunction with the detection unit to construct a unified coordinate plane for the installation and positioning of the integrated thermal insulation and decorative panel. The integrated thermal insulation and decorative panel also has positioning components and anchoring components that cooperate with the wall surface to be constructed. The method includes processes such as panel clamping, positioning, and fixing. This invention can effectively improve the installation accuracy of the panels, reduce construction difficulty, and increase construction efficiency.

The application discloses a steering column structure and an agricultural machine in the field of agricultural machinery, and relates to the technical field of agricultural machinery.The steering column structure comprises a pivotally arranged column mechanism assembly; a steering mechanism, wherein the steering mechanism comprises a first connecting rod and a second connecting rod, a connecting joint is arranged between the first connecting rod and the second connecting rod, the connecting structure is configured to realize the functions of active connection and mutual torque transmission of the first connecting rod and the second connecting rod; the rod body of the first connecting rod is arranged in a cavity of the column mechanism assembly, and the first connecting rod can rotate axially around the column mechanism assembly; a telescopic piece, one end of the telescopic piece is hingedly connected to the column mechanism, and the other end is hingedly arranged; wherein the telescopic piece realizes back-and-forth swinging of the column mechanism assembly around the hinge through telescopic movement; during use, the upper part of the steering mechanism is driven to swing back and forth through the telescopic piece, that is, the angle adjustment is quickly realized, the height of the steering wheel is adjusted according to different body sizes of users, and thus the users can conveniently drive the vehicle.

The application discloses a portable harvesting device and relates to the technical field of harvesting. The portable harvesting device comprises a fixed bottom shell, two symmetrically arranged synchronous deflection frame mechanisms arranged on the fixed bottom shell, a first driving mechanism arranged on the fixed bottom shell, a driving shaft mechanism arranged on the synchronous deflection frame mechanism, a second driving mechanism arranged on the fixed bottom shell, a plurality of variable-position rotating mechanisms connected with the driving shaft mechanism, a first harvesting mechanism connected with the driving shaft mechanism, a second harvesting mechanism connected with the variable-position rotating mechanism, a linkage lifting wheel mechanism arranged between the fixed bottom shell and the synchronous deflection frame mechanism, two hand-held handles arranged on the fixed bottom shell, and a controller arranged on the hand-held handle. The first driving mechanism can drive the two synchronous deflection frame mechanisms, so that the cutting interval is adjusted, the interval between the adjacent first harvesting mechanism and the second harvesting mechanism is adjusted, and the folding state of the device is adjusted, thereby increasing the portability of the device.

The application discloses a three-engine / two-engine configuration helicopter engine power balancing method and device, which utilizes an engine power control system to realize balancing; the method comprises the following steps: a cockpit power balancing switch is in a torque balancing gear by default; when a pilot observes engine operation, if a difference between gas turbine outlet temperatures ITT of two engines / three engines is less than a preset temperature threshold and a percentage difference between Ngs is less than a preset speed threshold, the cockpit power balancing switch is not operated, and a current torque balancing state is maintained; when the pilot observes that the difference between the ITT of different engines is greater than the preset temperature threshold and the percentage difference between the Ngs is greater than the preset speed threshold, it is considered that the performance difference between the different engines is large, and then the cockpit power balancing switch is manually switched to an Ng balancing gear; after the engine electronic controller receives the Ng balancing gear information, Ng balancing is performed.

The application provides a trimming tool. The trimming tool comprises a housing, a cutting mechanism and a driving mechanism, wherein the cutting mechanism has a cutting plane, the driving mechanism is configured to drive the cutting mechanism to operate, and a guard plate is arranged on the housing; an indicating mechanism is arranged on the guard plate, and the indicating mechanism is configured to indicate a deflection state of the cutting plane relative to a reference plane; wherein a straight line extending along the length direction of the cutting plane and parallel to the reference plane is taken as a deflection axis, and the deflection state is a state that the cutting plane is deflected relative to the reference plane around the deflection axis.

This invention discloses a multi-position independently controllable device and method for testing the lifespan of buttons in household appliances. The device includes a movable base, a dual-rotation support mechanism, a lifting adjustment unit, and a multi-cylinder independent testing unit. The dual-rotation structure allows for 180° forward / backward and 90° left / right posture adjustment, with a lifting stroke of 75mm~530mm. Each cylinder is independently equipped with a pressure regulating valve, a solenoid valve, and a counting unit, allowing for individual adjustment of force, frequency, and counting. The power supply system is independently isolated. The method employs upright product clamping, multi-position alignment, and parallel testing of multiple buttons; a single button failure does not affect the overall operation. This invention eliminates the need for inverting the product, realistically simulates usage posture, has a wide range of applications, allows for rapid product changeover, and offers high testing accuracy and efficiency, making it suitable for button lifespan testing in various household appliances.

An online dry powder bag leak detection device includes: an adjustable clamp, a spacing positioning component, a pressure gauge, a pressure tube, and a pressure tapping tube. The adjustable clamp includes first and second pressure plates arranged in parallel, connected by an adjustable connector, and the spacing between the two pressure plates is adjustable. A slot is provided on the first pressure plate. The online dry powder bag is placed between the two pressure plates, with the online connector located in the slot and protruding upwards from the first pressure plate. The spacing positioning component includes a positioning body and spacing positioning platforms of different thicknesses disposed on the positioning body. The spacing positioning platforms can be inserted between the first and second pressure plates to position the spacing between them. One end of the pressure tube is connected to an external air source, and the other end is connected to the liquid inlet pipe of the online connector. One end of the pressure tapping tube is connected to the liquid outlet pipe of the online connector, and the other end is connected to a pressure sensor. This invention improves the accuracy and ease of operation for leak detection of online dry powder bags with welded online connectors.

The invention discloses a tunnel full-process mechanical building construction method and system, is used for solving the technical problems related to back break control, primary support flatness, lining compactness and process cooperation efficiency in tunnel construction, and belongs to the technical field of tunnel and underground engineering construction. The method comprises the following steps that firstly, a tunnel is excavated; tunnel excavation is carried out by using a synchronous benching method in tunnel excavation based on large machine operation space optimization; 2, controlling over-break and under-break of the tunnel; intelligent control over back break of the drill jumbo is carried out through multi-mode cooperation; thirdly, tunnel primary supporting is carried out; the sprayed concrete in the primary support of the tunnel is subjected to three-time spraying, two-time scraping and one-time surface sweeping, so that precise layered forming is facilitated; fourthly, tunnel lining is conducted; the quality of the tunnel lining is guaranteed through integration of anti-disengaging double control and longitudinal pouring.

The utility model discloses a kind of efficient brushless hollow cup DC motor stator, including the stator core made of high saturation soft magnetic material, the middle part of the stator core is equipped with core inner hole, the inside of the core inner hole is equipped with cup type winding, and the inside of the core inner hole is attached with insulating film, the cup type winding is by several sheet hexagonal winding column and is rolled by coiling machine, the cup type winding is fixed on the inner wall of core inner hole by high temperature epoxy adhesive layer;The utility model not only guarantees the electrical insulation between stator core and winding cup, but also reduces the inconvenience caused by artificial paste insulating film, improves the quality reliability of stator, shortens manufacturing cycle, improves work efficiency;Relative to filling process, manufacturing cycle is shortened by 2 / 3.

The application discloses a steel strand inclined cable intermediate tensioning and dismantling method, which adopts a method of tensioning and dismantling steel strands one by one to realize cable force tensioning of the whole cable; one steel strand to be dismantled is divided into an upper segment L1, a middle segment L2 and a lower segment L3 by two sets of clamping devices; two tool steel strands are correspondingly passed through left and right holes of the two clamping devices and anchored by clamping pieces; the middle segment L2 of the steel strand to be dismantled between the two clamping devices is gradually loosened and cut by a jack tensioning; the upper segment L1 and the lower segment L3 of the steel strand to be dismantled outside the clamping devices are loosened, and a crane hoists away the upper and lower steel strand cable bodies respectively. The application solves technical problems of the prior art, such as insufficient length of old steel strands in long-span cable-stayed bridge steel strand cable replacement construction, high safety risk of high-altitude tower operation, great construction difficulty and low economic applicability.

The present application relates to wharf cast-in-situ unloading plate auxiliary support technical field, especially in a kind of wharf cast-in-situ unloading plate liftable steel bottom mould system of adjusting, including tripod, jacking screw, crossbeam, adjusting seat, steel bottom mould and first adjusting device.Adjusting seat has multiple adjusting rods.First adjusting device includes first fixed frame, first worm shaft and multiple drive gears.First, jacking screw is connected tripod and crossbeam, steel bottom mould is installed on crossbeam, first fixed frame is assembled on tripod and multiple drive gears are engaged with multiple adjusting rods respectively, first worm shaft is driven by tool, multiple drive gears are driven simultaneously by multiple adjusting seats, so as to drive jacking screw to drive crossbeam to move up and down.Jacking screw telescopic adjustment can quickly control steel bottom mould to lift, ensure that unloading plate appearance size and flatness meet design requirements, effectively ensure that concrete component surface quality.

The invention relates to the technical field of granite ice crack laying, in particular to a granite ice crack laying tool and a modular construction method.The granite ice crack laying tool comprises a plurality of nesting boxes, the shapes of the nesting boxes are different, the number of edges of each nesting box is larger than four, and the number of the edges of each nesting box is larger than four. Every two adjacent nested boxes are connected through a connecting mechanism, and the width of an abutted seam between every two adjacent nested boxes ranges from 5 cm to 15 cm. The method has the advantages that the broken splicing units are designed in advance through drawing software, subjective influence is reduced through construction with modules as units, the seam width is controlled through the nested box set, falling plate positioning is facilitated, the quality control difficulty is reduced, the complex on-site splicing process is converted into assembling of the fixed units, and the production efficiency is improved. The design of the nesting box group further reduces the process of repeated adjustment after plate falling, improves the work efficiency and reduces the cost.

This utility model discloses a quick-connect seepage prevention structure for waterstops in underpass structures at road-bridge junctions, including adjacent overlapping waterstop bodies, pressing components, and a cold-bonded seepage prevention layer. The advantages of this utility model are: (1) Improved connection strength: The composite seepage prevention structure with cold bonding and pressing ensures stability under water pressure and structural deformation force, and the cold-bonded seepage prevention layer improves the seepage prevention effect of the joint; when subjected to 1.2MPa water pressure and ±20% structural deformation, no structural damage or leakage will occur; (2) Excellent sealing performance: It fills the transverse and longitudinal gaps tightly, and the formed cold-bonded seepage prevention layer fills the gaps that will inevitably form between the lower waterstop and the upper waterstop, as well as between the waterstop and the concrete structure, reducing the risk of leakage and ensuring waterproofing and structural safety; (3) Convenient and efficient construction: The construction method is clear and easy to operate, and the material cools down quickly, ensuring the safety of the underpass structure at the road-bridge junction.

The utility model relates to the technical field of tractors, in particular to a multifunctional armrest box and a tractor, the multifunctional armrest box is used for being installed on the side portion of a seat of an agricultural machine, and the multifunctional armrest box comprises a base, a main handle, an auxiliary handle, an operation panel and a multi-way valve switch; wherein the main handle and the auxiliary handle are respectively arranged on two opposite sides of the base; the operation panel and the multi-way valve switch are both arranged in the area, located between the main handle and the auxiliary handle, of the base. According to the multifunctional armrest box, the operation panel and the multi-way valve switch are integrated between the main handle and the auxiliary handle, keys or the multi-way valve switch and the like can be operated more easily, convenience is improved, by limiting the angle and distance between the main handle and the auxiliary handle and the elbow supporting cover plate, a driver can operate the handles more conveniently, and operation is more convenient. And in addition, the use requirements of drivers with different body types can be met, and man-machine engineering is better and more comfortable.

The invention relates to the technical field of building construction, in particular to an underground diaphragm wall device suitable for complex geological conditions and a construction method.The device comprises a steel reinforcement cage, guide boxes are symmetrically arranged on the two sides of the top and the two sides of the bottom of the steel reinforcement cage, and pulleys capable of adjusting the extending length are arranged on the outer sides of the guide boxes; an adjusting assembly composed of a worm gear, a worm, a threaded sleeve and an adjusting rod is arranged in the box to control the pulleys to stretch out and draw back. The bottom of the guide box is fixedly connected with a mounting box, a clamping jaw is rotationally connected in the guide box through a first rotating shaft, and a locking assembly comprising a [-shaped locking block, a spring and a push plate is arranged. During construction, the clamping jaw and the locking assembly are used for automatically clamping the reinforcement cage, and after the reinforcement cage is hoisted into the groove, the pulley is adjusted to be tightly attached to the groove wall so as to guide the reinforcement cage to be centered; when the reinforcement cage is lowered to the bottom of the groove, the locking assembly automatically relieves locking in stages, the clamping jaw retracts under the action of the torsional spring, and the device is separated from the reinforcement cage. The clamping device has the advantages that the groove wall is protected, automatic centering is achieved, clamping is stable, and automatic unhooking can be achieved.

The invention relates to a cutting device and method for fusion shrinkage and stretching of an optical fiber preform. The device comprises a stand column, an up-down lifting device and a lifting seat are arranged on the stand column, the up-down lifting device is connected with a lifting driving device, an annular guide rail is arranged on the lifting seat, a rotating seat is arranged on the annular guide rail, and the rotating seat is connected with the lifting driving device. And a laser cutter is arranged on the rotating seat. Through laser automatic annular layered cutting, a notch of the glass optical fiber preform is straight and smooth, glass burrs and microcracks are avoided, the adverse effect of cutting of other cutters on the cutting part of the preform is avoided, and the perpendicularity of the cutting surface and the preform can be ensured through synchronous downward movement of the laser and the optical fiber preform; the cutting quality is obviously improved, and the device can be used for cutting solid-core optical fiber preforms and is more suitable for cutting hollow-core optical fiber preforms; cutting is conducted in a mode synchronous with melting shrinkage stretching, stretching is not affected, the cutting speed is high, and the stretching cutting work efficiency is effectively improved.

This invention discloses a method for treating abandoned culverts, comprising: sealing the abandoned culvert in sections; pre-burying a delivery pipe and a grouting pipe in each section of the culvert, with one end of the delivery pipe located at the lower part of the section and one end of the grouting pipe located at the upper part of the section; injecting foamed lightweight soil into the section of the culvert through the delivery pipe, so that the foamed lightweight soil fills the section of the culvert; after the foamed lightweight soil in the section of the culvert has initially set, injecting cement slurry into the section of the culvert under high pressure through the grouting pipe, the cement slurry penetrating and reinforcing the foamed lightweight soil to form a composite reinforcement layer. This invention solves the problems of water and soil pollution, high treatment costs, and high settlement risks associated with traditional culvert demolition during urban road renovation and upgrading.

The utility model relates to a kind of end face tool setting instrument support for numerical control cylindrical grinder, it include: oil cylinder body, instrument seat, rotating shaft, gear, clamping block and tool setting instrument, the rotating shaft rotation is arranged in the instrument seat, the gear is set on the rotating shaft, the instrument seat is fixed in the one end of rotating shaft, the oil cylinder body is fixed in one side of instrument seat, the piston rod one end of the oil cylinder body is provided with gear face and is inserted into the instrument seat, the gear face is engaged with the gear each other, the tool setting instrument is fixed on the clamping block.The utility model is rotated by oil cylinder drive gear, to drive clamping block rotation, realize the position adjustment of tool setting instrument.The utility model structure compact, novel, cost-effective, easy to operate, save auxiliary time, improve work efficiency, improve the practicality and application universality of numerical control cylindrical grinder.

The utility model discloses a rapid steel wire rope winding and unwinding device which comprises a base plate (1), a rotating disc (2), a guiding device (3) and a rope winding and unwinding cage (4). The turntable (2) is located at the upper part of the chassis (1) and is rotationally connected with the chassis (1), the guide device (3) comprises a guide pulley (3-1) for guiding a steel wire rope, the rope winding and unwinding cage (4) is fixed on the turntable (2) and is formed by connecting a plurality of pipes, a rope winding space is formed in the rope winding and unwinding cage (4), and an opening is formed in the top of the rope winding and unwinding cage (4). And the steel wire rope can be wound outside the rope winding and unwinding cage (4), and when the rope is wound, the steel wire rope can be stored in the rope winding space through the opening. The steel wire rope replacing device is convenient to operate, saves manpower, effectively reduces the labor amount of personnel, shortens the replacing time, improves the replacing efficiency and reliability, and effectively prolongs the service life of the steel wire rope.

The utility model relates to a portable distance fixing device which comprises a horizontal support, two hole opening cups are arranged on the horizontal support in a sleeved mode, one hole opening cup is fixed at one end of the horizontal support, the other hole opening cup is connected with the horizontal support in a sliding mode and located through a bolt extending in the radial direction, and the tops of the hole opening cups are coaxially arranged on the horizontal support in a sleeved mode through sleeves. Wherein a through pipe is fixedly arranged at the top of a sleeve of the hole opening cup fixed to the end of the horizontal support, an L-shaped distance fixing rod is arranged in the through pipe in a penetrating mode, the end of the horizontal section of the distance fixing rod penetrates into the through pipe, is connected with the through pipe in a sliding mode and is positioned through a bolt extending in the radial direction, and the vertical section of the distance fixing rod vertically extends downwards to be in the same level with the bottom end of the hole opening cup. The efficiency is high.

The present application relates to the technical field of hub bearing machining, particularly to a lathe machining equipment and method for hub bearing outer ring, comprising a lathe main body, characterized in that: the lathe main body comprises a lathe shell, an operation panel is connected to one side of the outer wall of the lathe shell, a lathe hatch is arranged on the outer wall of the lathe shell, a lathe bed is arranged in the lathe shell, a large apron and a lead screw driving unit for driving the large apron to move along the bed rail in the axial direction are arranged on the lathe bed; a tool holder base is arranged on one side of the top of the large apron, a turret tool holder is connected to one side of the tool holder base, a cutting fluid spray pipe is connected to one side of the tool holder base, the present application integrates double-spindle driving and a composite clamp system, solves the problems of poor cutting rigidity of thin-walled parts and difficult clamping deformation: double-spindle synchronous transmission + limiting ring constraint, inhibits chatter, ensures roundness and coaxiality; integrated chain-type chip removal + magnetic separation closed-loop cooling, automatically separates and circulates chips and cutting fluid, reduces cleaning intensity.

The utility model provides a kind of cable trench support and its prefabrication device.The prefabrication device of cable trench support includes pedestal, main frame positioning assembly, cross bracing positioning assembly and cross bracing balancing assembly.Main frame positioning assembly, cross bracing positioning assembly and cross bracing balancing assembly are fixed on pedestal.Main frame positioning assembly includes first main frame positioning part and second main frame positioning part, the distance between the two is consistent with the width of main frame, to position main frame.Cross bracing positioning assembly is multiple, multiple cross bracing positioning assembly is spaced, each cross bracing positioning assembly corresponds a cross bracing, for positioning cross bracing.Cross bracing balancing assembly is set away from main frame positioning assembly relative to cross bracing positioning assembly, the height of cross bracing balancing assembly is consistent with the height of main frame, and cross bracing can be placed on cross bracing balancing assembly.The prefabrication device of above-mentioned cable trench support can improve work efficiency and save cost.