98results about How to "Shorten retrofit time" patented technology

The invention provides a self-adapting method and device for a base band unit equipment RRU interface protocol based on an FPGA. The FPGA comprises a type register. The method comprises the steps that an RRU loads the FPGA; the FPGA comprises one or more interface protocol types; the RRU has the access to a BBU by adopting any interface protocol type; the RRU detects the current interface protocol type of the BBU; the RRU records corresponding type marks in the cache type register according to the current interface protocol type; the RRU carries out configuration according to the interface protocol types corresponding to the type marks. The method and device are used for detecting and adjusting the interface protocol, guaranteeing uniformity of the protocol and an opposite-end equipment interface protocol, lowering complexity for achieving normal communication, shortening the transformation time that a TD-SCDMA base station is evolved to a TD-LTE base station, and guaranteeing the normal communication of equipment in common networking.

The invention discloses a wireless traffic signal control system, implementing the control of a traffic signal controller on a counting-down board in a wireless transmitting mode, and particularly making real-time self-adapting control according to the traffic flow signal of each crossing. The invention constructs a traffic signal control system in a wireless accessing mode, and can set several crossings as a traffic signal control system, even some region or city as a traffic signal control system, thus reducing the cost and able to orderly, and systemically control the traffic at each crossing. Besides, the invention solves the problem that the exiting self-adapting traffic signal control system is unable to control the counting-down board in time, and implements the function of controlling the counting-down board, wirelessly.

The invention discloses a 40 DEG C high-specific-activity xylanase mutant and a construction method and application thereof, and relates to the fields of genetic engineering and heredity engineering.An N terminal truncate mutant XYL10C-delta N of GH10 family high temperature xylanase XYL10C from Bispora sp.MEY-1 is used as a female parent, and a molecular biology technique is adopted for performing fixed point mutation after-expression on amino acids. Under a reformation condition, the specific activity of the xylanase variant under the 40 DEG C is notably improved compared with the specificactivity of wild type. The heat stability of the mutant is improved, resisting of enzymes to high-temperature granulation process is facilitated, and finally, inactivation cannot be caused. The condition is created for application to feeds. Under the acid environment, the stability is improved, degradation of lignocellulose to reducing sugar is facilitated, and the application prospect is widened.

The invention provides a method and system for collecting substation area protection data based on telecontrol equipment. The method comprises the steps that the telecontrol communication equipment collects the substation area protection data in a station, the substation area protection data are encapsulated into data messages according to an IEC104 communication protocol, and the data messages are sent to a substation area protection control device through the Ethernet; the data messages are received by the substation area protection control device and are analyzed according to the IEC104 communication protocol, and the corresponding substation area protection data are obtained and are written in an internal shared memory. A primary device and a secondary device for collecting information are prevented from being added to a transformer substation, and implementation cost for substation area protection is lowered; the substation area protection control device can efficiently acquire data information from the telecontrol communication equipment at high speed, and the change on the internal structure of the transformer substation and the influence on the operation of the transformer substation are avoided.

The invention discloses an acid-resistant amylase mutant and a preparation method thereof, belonging to the field of genetic engineering. In the invention, by using Bacillus subtilis amylase as a female parent, the Bacillus subtilis amylase sequence is subjected to site-directed mutagenesis by a molecular biology technique, and the optimum reaction pH value of the Bacillus subtilis amylase is converted into 4.5 from 7.0 of the control (before mutagenesis) sample under such transformation conditions; and after the mutagenesis, the catalytic efficiency of the amylase is enhanced by 5 times under the pH value of 4.5. The scheme disclosed by the invention can greatly enhance the acid resistance of the amylase, and provides foundation for industrial production. The mutagenesis has important instruction meanings for transforming properties of other enzymes.

The invention discloses a high-catalytic-efficiency xylanase mutant as well as a construction method and an application thereof, which relate to the field of gene engineering and genetic engineering.The method comprises the following steps: GH10 family high-temperature xylanase derived from Bispora sp. MEY-1 is taken as a male parent, gH10 family xylanase XylE derived from Penicillium canescens is used as a female parent, a molecular biological technology is adopted to replace a segment corresponding to the female parent with a segment in a male parent, and then segment combination and expression are carried out. Under the modification condition, the specific activity and the thermal stability of the xylanase mutant are remarkably improved compared with those of a wild type (before mutation). According to the method, the catalytic efficiency and temperature tolerance of xylanase are greatly improved, and conditions are created for the method in the field of industrial production.

The invention discloses a thermostable amylase mutant and a preparation method and application thereof, belonging to the field of genetic engineering. Bacillus stearothermophilus amylase is taken as a female parent, the N-terminal area of the bacillus stearothermophilus amylase and oligopeptide are connected through PT-linker so as to obtain the mutant, and the amino acid sequence of the oligopeptide is shown as SEQIDNO.1. Under the transformation condition, the bacillus stearothermophilus amylase is improved to be 7h from 4h of a comparison example (before mutation) in half-life period at 95DEG C. The method remarkably improves the thermostability of the amylase and provides a foundation for industrial production of the amylase.

The invention discloses an on-line visual remote control terminal and method used for transformer station background upgrading. First, an original background of a transformer station sends remote control selection and execution commands to a measuring and control device and whether parameter configuration of a remote control debugging terminal is normal is determined; then a new background of the transformer station sends remote control selection and execution commands to the same remote control object of the measuring and control device; whether the remote control function of the new background is normal is determined through a voice broadcast function of the remote control debugging terminal, a liquid crystal display screen and an LED indicating lamp; the above steps are repeated, and therefore on-line remote control debugging of each remote control object of the transformer station is completed. Remote control accuracy and reliability can be raised, reconstruction time can be saved greatly, therefore reconstruction cost is saved, and good technical and economic meanings can be achieved.

The invention discloses a manufacturing method of a tyre with colorful patterns, comprising the following steps of manufacturing a tyre body of the tyre by adopting the prior art; printing or coating colorful printing ink on the outer side of the tyre body according to set patterns; carrying out low-energy electron beam radiation on the colorful printing ink to make the colorful printing ink solidify at the tyre sides. The invention also discloses an automatic production line of the tyre with the colorful patterns. The automatic production line of the tyre comprises an automatic control system, a production transmission line, a printing or coating device and an irradiation solidification device. According to the manufacturing method and the automatic production line of the tyre with the colorful patterns, the existing tyre production facility does not need to be remoulded, the remoulding time of the production facility of a tyre manufacturer is short, the economic cost is small, the production cost of the colorful tyre is low, the degree of automation is high, the whole production efficiency is high, important social and economic benefits are realized, and the manufacturing method and the automatic production line of the tyre are worth of popularization and application.

The invention discloses a comprehensive improvement device for saline-alkali land. The device comprises a rack, a topsoil extraction mechanism, a topsoil backfilling mechanism, a spreading material adding mechanism and a pressing mechanism, wherein the topsoil extraction mechanism comprises a shovel plate arranged on the front side of the rack and a soil conveying device arranged on the rack and connected to the rear side of the shovel plate; the topsoil backfilling mechanism comprises a sieve plate arranged on the rack and connected to the rear side of the soil conveying device; the spreadingmaterial adding mechanism comprises a storage bin arranged on the rack and located above the sieve plate and a discharge box arranged on the rack and located on the lower side of the sieve plate; thestorage bin and the discharge box are arranged at an interval vertically and communicated through a plurality of pipes; the pressing mechanism comprises a first pressing roller, a second pressing roller and a third pressing roller, the first pressing roller and the second pressing roller are arranged on the rack and located on the front side and the rear side of a discharge opening of the discharge box, the third pressing roller is arranged on the rack and located on the rear side of the sieve plate, the first pressing roller is located below the soil conveying device, and the second pressingroller is located on the front side of the sieve plate below the discharge box. The device has high automation degree, and can quickly and efficiently finish saline-alkali land reconstruction work.

The invention discloses an oxidation-resistant amylase mutant and a preparation method thereof, and belongs to the field of genetic engineering. The preparation method of the invention adopts Bacillus alcalophilus JN21 (CCTCC NO: M 2011231) amylase as a female parent, and performs site-directed mutagenesis of the Bacillus alcalophilus amylase sequence by molecular biology technology. Under the reconstruction conditions, the Bacillus alcalophilus amylase is treated at 40 DEG C in 500 mM H2O2 environment for 30 min, and the enzymatic activity residue is increased from 18% of a control (before mutation) case to 92%; with the strategy, the oxidation resistance of the amylase is greatly increased, which lays a foundation for the application of the amylase in industrial production fields of weaving desizing, washing agent additives, and the like. The strategy has important guidance meaning for the reconstruction of oxidation resistance of amylase and other enzymes.

The invention discloses a method for implementing reading and writing of an IC card, which comprises the following steps: judging whether a maximum storage limit value and a target storage limit value are set in the standard of the IC card or not before carrying out appreciation or depreciation operation on the IC card, and leading an offline card reader to only carry out one-way depreciation command operation on the maximum storage limit value in the IC card when implementing a depreciation operation command on the IC card if the maximum storage limit value and the target storage limit valueexist, or leading the online card reader to only carry out one-way depreciation command operation on the target storage limit value in the IC card when implementing an appreciation operation command on the IC card. The invention further discloses the corresponding card reader, the IC card and a system, the adoption of the scheme provided by the invention can realize online appreciation by only adjusting the exiting storage way of key data of the IC card and increasing a small amount of storage content and simultaneously transforming the appreciation card reader to the online card reader; and other devices and the system only need to carry out software updating, thereby reducing the transformation cost and the time.

The invention discloses a method for transforming a shield tunneling system adapting to 36-degree pipe segments into a shield tunneling system adapting to 22.5-degree pipe segments. Original propulsion cylinder arrangement which adopts 30 odd-numbered and even-numbered cylinders distributed at an interval of 18 degrees and adapts to 36-degree pipe segments is divided into four quadrants according to two axes. First, second, third and fourth support shoes in the first quadrant of propulsion cylinders are transformed to form four new sets of support shoes, and transformation in the symmetrical positions of the other three quadrants is the same with transformation on the first quadrant, so that there is a cylinder corresponding to the position where a 22.5 pipe segment capping block appears in all 16 adjusting positions within 360 degrees of the circumference. The problem that a shield adapting to 36-degree pipe segments cannot adapt to assembling of 22.5-degree pipe segments is solved, the transformation time is shortened, the period in which shield equipment stops waiting due to project continuing interval is shortened, and the adaptability of equipment is enhanced.

The invention discloses a conducting wire taking-up and paying-off device of a power supply circuit and a taking-up and paying-off method, and relates to the taking-up and paying-off device for taking up and paying off a power supply conducting wire, corresponding shaft holes are formed at the centers of an inner side plate and an outer side plate, a rotating shaft is arranged in the shaft holes,a plurality of connecting rod holes are correspondingly arranged on the inner side plate and the outer side plate, connecting rods are arranged in the connecting rod holes, a plurality of symmetricalfixing holes are arranged on the inner side plate, and screw threads in the fixing holes are connected on a driving wheel hub of a tractor or a vehicle. In addition, the inner side plate, the outer side plate, the rotating shaft and the connecting rods are in a detachable connecting structure; and a plurality of support rods are arranged outside the inner side plate and the outer side plate alongthe longitudinal direction, and edge rings are connected outside the support rods. The taking-up and paying-off device has the characteristics of being simple in structure, low in cost, fast for taking up and paying off, convenient for operation, convenient for disassembly and assembly, strong in practicability, low in failure rate, high in safety and strong in maneuverability, and can fully utilize a small four-wheel tractor which is common in rural areas as power for mechanically taking up and paying off.

The invention relates to a ship thrust distribution method capable of being used in different navigational speed modes. The ship thrust distribution method comprises the following steps: (1) establishing thrust calculation mathematical models of various propellers of a ship; (2) establishing a rudder force calculation mathematical model of the ship; (3) establishing a ship stress model based on the thrust calculation mathematical model and the rudder force calculation mathematical model of various propellers of the ship; (4) establishing an optimization objective function based on the optimalpower consumption and distribution effect of various propellers, and establishing corresponding constraint conditions based on the mechanical properties of various propellers and the ship stress model; and (5) solving the optimization objective function by using an optimization algorithm to obtain an actual thrust value of each thruster. Thrust distribution optimization in low-speed and medium-high-speed modes can be achieved through the combination of double propellers, double rudders and lateral propellers.

The invention relates to a single-column pier beam bridge and a reinforcement and transformation method of the single-column pier beam bridge, and belongs to the technical field of bridge reinforcement and transformation. The method comprises the following steps: (1) measuring an inclination angle between a main beam side part and a pier side part; (2) prefabricating an anti-overturning device, wherein the anti-overturning device comprises a wedge-shaped mother plate, a pull rod clamping groove and a pull rod; (3) driving anchor bolts into the preset positions of the side surface parts, and fixing the upper wedge-shaped mother board and the lower wedge-shaped mother board on the corresponding side surface parts by using nuts; (4) the two expansion ends of each pull rod are clamped into thegroove cavities of the upper pull rod clamping groove and the lower pull rod clamping groove from the open ends of the clamping grooves, and movable gaps can be reserved between the two expansion ends of each pull rod and the cavity walls of the corresponding clamping groove cavity; and (5) filling a groove cavity of the pull rod clamping groove with a non-hydrophilic lubricant, and sealing the groove cavity of the pull rod clamping groove to form a sealed cavity. The reinforcement and transformation method is convenient to construct, low in cost and convenient to replace in the subsequent maintenance process, and can be widely applied to the field of bridge reinforcement and transformation.

The invention discloses a conductive core plate and a manufacturing method. The conductive core plate comprises an insulating material layer, a metal conductive circuit layer, a packaging adhesive film layer and a back plate layer in sequence from top to bottom, wherein all the layers are bonded in a low-temperature heating mode; the metal conductive circuit layer and the packaging adhesive film layer are compounded and bonded, and a conductive circuit diagram is arranged on the metal conductive circuit layer; a plurality of small holes are formed in the insulating material layer, and the positions of the holes correspond to the positions of electrode points on the battery piece; the conductive circuit diagram takes set unit patterns as a basis, and the unit patterns are arranged above thebattery piece in an array manner. According to the invention, the conductive core plate adopts a longitudinal cardinal number column 13*12 half-cut battery arrangement mode, and the cardinal number column battery arrangement is achieved; meanwhile, the number of the batteries connected with the diodes is equal, the installation direction of a junction box is parallel to the short edges of the assembly and is the same as the position of a junction box of a conventional assembly, and if the connection mode is a solder strip assembly, the connection mode is hardly achieved, and the equipment transformation cost can be effectively reduced at the same time.

The invention discloses an amylase mutant having improved heat stability, a construction method and application of the amylase mutant, belonging to the genetic engineering field. The sequence which is shown by SEQ ID NO.1 is a starting sequence, the 193rd asparagine is replaced by phenylalanine, or the 206th methionine is replaced by phenylalanine, or the 240th lysine is replaced by arginine, or the 242nd serine is replaced by glutamine or alanine, or the 180th glycine and the 181st isoleucine are missed, or the above methods are combined freely to obtain the amylase mutant. Under a transformation condition, the half-life period of thermophilic fat bacillus amylase at 95 DEG.C is increased to 240 min from 10 min which is the half-life period of the contrast example before mutation, the heat stability of the amylase is significantly improved, and the amylase mutant lays the foundation for industrial production.

The invention discloses a cooling power source control system for exciting power cabinets. The cooling power source control system for the exciting power cabinets comprises the power cabinets, an excitation regulator control cabinet and power supplies and the power supplies comprise the working power supply and the emergency power supply; each power cabinet comprises a plurality of working fans, a plurality of standby fans and a power-down alarming circuit; the working power supply is connected with the working fans after being connected with a voltage relay K20, a breaker Q11 and a relay K11 and the standby power supply is connected with the standby fans after being connected with a voltage relay K21, a breaker Q12 and a relay K12; the power-down alarming circuit is connected with the excitation regulator control cabinet. The cooling power source control system for the exciting power cabinets guarantees that when the main power supply breaks down, the power supply of the cooling fan is rapidly switched to the emergency power supply or the working fan is switched to one standby fan for work, frequent switching caused by shaking of the power supplies is avoided, and the hidden danger that due to instability of the power supplies, the working power supply and the emergency power supply compete with each other in the process of frequent switching of the working power supply and the emergency power supply and a short circuit of the working power supply and the emergency power supply is generated is eradicated.

The invention discloses a D,D-carboxypeptidase DacA mutant with improved catalysis efficiency and a preparation method thereof, belonging to the fields of genetic engineering and enzyme engineering. D,D-carboxypeptidase DacA from Escherichia coli BL21 is used as a female parent, key sites and a mutation manner are determined based on enzyme structure analysis, and the DacA mutant with improved catalysis efficiency is obtained through fixed point mutation by using a molecular biological technology. Under the modification condition, the catalysis efficiency constant k<cat> of E.coli D,D-carboxypeptidase DacA mutant K113G is improved at most, from 6543.4s<-1> to 9428.1s<-1>. Due to adoption of the method, the catalysis efficiency of the D,D-carboxypeptidase DacA is improved remarkably, layinga foundation for the application of metabolizing and modifying E.coli to improve exocytosis level and the like. The method has an important guiding significance in property modification of other enzymes.

The invention provides a high-specific-activity high-catalytic-efficiency amylase mutant and a preparation method and application thereof and relates to the field of gene engineering. Acid amylase derived from Talaromyces leycettanus JCM12802 is used as a female parent, and the wild type is subjected to site-directed mutagenesis by means of molecular biological techniques. Under the modification condition, the amylase mutant has significantly higher catalytic efficiency and specific activity than the wild (before mutation) female parent. By using the scheme, it is possible to greatly increase the specific activity and acting conditions of amylase, and basis is provided for the amylase in industrial production field. The scheme is of important guidance for increasing the catalytic efficiency and specific activity of amylase and other enzymes.

The embodiment of the invention provides an applet updating method and device. The method comprises: obtaining an applet file corresponding to a to-be-converted target applet; obtaining all global variables contained in the applet file; and updating all the global variables so as to connect the target applet to a service platform. According to the embodiment of the invention, the global variable in the applet file is updated to connect the applet to the service platform, so that only the global variable of the applet needs to be redefined in the process of converting the applet into the appletof the service platform, the service amount of service personnel is reduced, and the modification time of the applet is shortened.

The invention discloses a method for modifying a shield driving system adapting to 22.5-degree duct pieces to adapt to 36-degree duct pieces. An original oil cylinder arrangement of a propulsion oil cylinders adopting evenly distributed 32 oil cylinders and adapting to 22.5-degree duct pieces is divided into four quadrants according to two axes, first, second, third and fourth supporting shoes in the first quadrant of the propulsion oil cylinder are modified to form five sets of new supporting shoes, the modification of the symmetrical positions of the other three quadrants is the same with the first quadrant, and ten adjustment positions in the circumferential direction of 360 degrees are each provided with a set of oil cylinder corresponding to the occurrence position of a top sealing block of a 36-degree duct piece. The method solves the problem that a shield adapting to the 22.5-degree duct pieces can not adapt to the 36-degree duct pieces, the modification time is shortened, the waiting period when the shield equipment stops in the project continuing interval is shortened, and the equipment adaptability is enhanced.

The invention provides a quick coupling for fluid loading and unloading. The quick coupling comprises a valve, a fixed inner ring, a guide inner ring, an outer ring, a nut flange and a hand wheel, wherein the valve is arranged in the guide inner ring, the guide inner ring is connected with the fixed inner ring, and the outer ring and the hand wheel are respectively connected with the nut flange; the rear end of the valve is of a screw structure, and thread is arranged in the nut flange and matched with a thread on the screw structure; guide holes are formed in the edge of the end surface of the fixed inner ring, or guide holes are correspondingly formed in the edge of the end surface of the fixed inner ring and the edge of the end surface of the guide inner ring; an interlocking limiting guide rod is arranged in each guide hole; a guide centre is fixed to the rear end of each interlocking limiting guide rod, a spiral groove is formed in the outer surface of the outer ring, and the guide centres are located in the spiral groove; the thread of the spiral groove is opposite to the thread of the screw structure in rotating direction; a sliding-moving device is fixed to the valve and can drive the valve to slide in the guide inner ring along the axis. and a limiting structure is arranged on the fixed inner ring. The quick coupling has the advantages that a tank car does not need tobe transformed, and operation is easy.

The invention relates to the technical field of outdoor electrical devices, in particular to a ring main unit distribution automation reconstruction device. The ring main unit distribution automation reconstruction device comprises a secondary electric power supply device, an automation device and a switch cabinet electric operation mechanism, wherein a small CT passive electricity obtaining device serves as the secondary electric power supply device, the small CT passive electricity obtaining device is composed of an open-type electricity obtaining CT, a current-to-voltage device and a lithium iron phosphate storage battery, and the automation device is composed of a GPRS module, a communication manager and a small distributed FTU device. Due to the fact that the small CT passive electricity obtaining device is used instead of a PT to provide a secondary electric power supply, the small CT passive electricity obtaining device is small in occupied space, reconstruction can be directly carried out in an original outdoor box, and the time for reconstruction is greatly shortened; due to the fact that the small distributed FTU device is used, the defect that a centralized DTU screen is overlarge in size and cannot be installed in internal space of the original outdoor box is overcome; the ring main unit distribution automation reconstruction device can be universally applied to all the ring main units in the market. The ring main unit distribution automation reconstruction device has high practicability and universality, and is not limited by space.

The invention belongs to the technical field of aircrafts, and discloses a helicopter flight driving robot system. The helicopter flight driving robot system comprises a fuselage hanging frame, a fuselage bottom plate, a servo mechanism, a robot control box and a visual perception module, and the servo mechanism comprises a six-degree-of-freedom manipulator, a steering engine mechanical arm and a steering engine mechanical leg; the fuselage hanging frame is installed on a cockpit seat, and a space for containing the robot control box is formed in the fuselage hanging frame; the fuselage bottom plate is horizontally placed on the helicopter cockpit seat; the six-degree-of-freedom manipulator is used for controlling a helicopter steering column; the steering engine mechanical arm is used for controlling a helicopter collective pitch rod; the steering engine mechanical leg is used for controlling a helicopter rudder; and the visual perception module is used for monitoring the environment of a cockpit and the scene outside the cockpit. The robot system can be installed in the helicopter cockpit, the helicopter is independently piloted by connecting a robot executing mechanism and a helicopter control mechanism, and rapid switching between a manned mode and an unmanned mode of the helicopter can be achieved under the condition that the helicopter is not modified.

The invention discloses a power distribution overhead transmission line live laying wrapping insulating layer robot, and belongs to the field of electric power and power grid. The power distribution overhead transmission line live laying wrapping insulating layer robot comprises a moving mechanism, a lift control mechanism, an insulated leather transmission device, an insulated wrapping transmission device, a data transmission module, a self-diagnosis system, a power supply system and a display system; wherein the moving mechanism is connected with the lift control mechanism, the moving mechanism is used for horizontal movement, the lift control mechanism is used for vertical movement, so as to drive the insulated leather transmission device and the insulated wrapping transmission device to connect displacement, the insulated leather transmission device is used for transmitting insulated leathers to the insulated wrapping transmission device, the insulated wrapping transmission deviceis used for wrapping the insulated leathers around wires, and performing sealing. The power distribution overhead transmission line live laying wrapping insulating layer robot of the invention effectively solves the problems of insulated transformation cost and power failure, and greatly saves transformation time and funds investment in comparison with a conventional power distribution line insulated transformation.

The invention is suitable for the technical field of materials, and provides double-effect modification slurry for a seabed hydrate reservoir, application and an application method.The double-effect modification slurry is prepared from, by mass, 10-25% of a reaction base solution A, 10-20% of a reaction base solution B, 40-60% of a permeation enhancer, 0.1-1% of a reaction control agent, 0.3-2% of a reinforcing agent, 5-10% of a viscosity reducer and 1-5% of a clay stabilizer. According to the present invention, the rapid curing can be performed in the seabed hydrate reservoir temperature pressure environment to form the stable porous support network skeleton with characteristics of high flow conductivity and high strength, and the strong cementation effect with the sediment can be provided, such that the reservoir permeability is improved, the reservoir stability is increased, the double-effect modification of the natural gas hydrate reservoir is achieved, and the construction cost is reduced. Safe and efficient development of the natural gas hydrate is facilitated. In addition, the slurry can also be applied to the field of transformation and yield increase of soft and loose reservoirs such as coal seams, mud layers and weak cemented sand layers, the problems of crack closure, support failure and the like in the transformation process of the loose or soft unconventional oil and gas reservoir can be effectively solved, the purposes of yield increase, stable yield and high yield are achieved, and the development period is prolonged.

The invention discloses a ditch cover plate for supporting underground transportation of a railless rubber-tyred vehicle. The ditch cover plate for supporting underground transportation of the railless rubber-tyred vehicle comprises a plurality of fixed cover plate sets and a plurality of movable cover plate sets; each fixed cover plate set comprises a plurality of cover plates, each movable coverplate set comprises a plurality of cover plates; the fixed cover plate sets and the movable cover plate sets are arranged at intervals along the length direction of a ditch; the movable cover plate sets are detachably arranged above the underground ditch and are used for cleaning the underground ditch after being disassembled; each cover plate is formed by connecting a plurality of ground rail tracks side by side; and the ground rail tracks are ground rail tracks disassembled in underground auxiliary transportation railless transformation. The ditch cover plate is formed by transforming the waste ground rail tracks, waste resources are well utilized while load bearing of the ditch cover plate is guaranteed, waste is turned into wealth, the transformation process is simplified, the transformation time and capital investment in transformation are greatly saved, waste ground rail track accumulation is avoided, and the transformation time is saved.