117results about How to "Prevent impact" patented technology

A hinge (1) for a door opening over a horizontal axis, of the type comprising first and second supports (2, 3) that can be fixed to a compartment structure and to a door, at least rotatably constrained to each other through a pin (10). The hinge (1) comprises a fluidic cylinder-piston damper (9) of the type with internal flow leakage of the fluid contained therein. The damper (9) has a piston (18, 19) with a through-hole (20). The piston (18, 19) can have an appendix (19) that non-sealingly engages a chamber (17) when the door is closed, to increase the dampening. The hinge (1) has elastic means (7) such as a spring, to counteract the falling movement of the door when it is opened. The hinge (1) can be of the cam type, with a cam (4) and an abutment (5).

The invention relates to a big data processing technology in intelligent information processing of a computer and particularly relates to an intelligent analysis early warning method for a dangerousness tendency of prison persons serving sentences. The intelligent analysis early warning method comprises the following steps: carrying out efficient collection and extraction on information of persons serving sentences in a prison information system to obtain basic data of behavior characteristics of the persons serving sentences; carrying out analysis judgment and early warning on the dangerousness tendency of the persons serving sentences by adopting a cost sensitive multi-stage semi-monitoring analyzing method. The intelligent analysis early warning method has the beneficial effects that 1, a lot of monitoring data of the persons serving sentences, which are provided by an existing system, are sufficiently utilized to automatically find potential behavior characteristics and behavior models of the abnormal persons serving sentences; the construction cost of the system is smaller and the feasibility is strong; 2 the method considers a cost problem of incorrect judgment of an early warning system and the influences caused by the early warning incorrect judgment are reduced to the greatest extent so as to meet actual requirements; 3 the method provided by the invention has a stronger self-adaptive ability; the early warning accuracy of the established early warning system is higher and the influences caused by the incorrect judgment are small.

An MEMS accelerometer comprises a substrate, an acceleration sensitive chip and an integrated circuit, wherein the acceleration sensitive chip and the integrated circuit are arranged on the substrate, a temperature sensor is further arranged on the substrate and is adjacent to the acceleration sensitive chip, and the acceleration sensitive chip comprises a plurality of measurement bodies. Each measurement body comprises a mass block and a comb tooth structure, wherein the comb tooth structure comprises movable comb teeth extending from the mass block and fixed comb teeth, the movable comb teeth and the fixed comb teeth are arranged at intervals and form a difference detection capacitor, the comb tooth structure is divided into multiple groups, the multiple groups of comb teeth structures are divided into a first part and a second part, the variation direction of movable intervals of the comb tooth structure of the first part and the variation direction of movable intervals of the comb tooth structure of the second part are opposite, and one group of the comb tooth structure and one group of the comb tooth structure of the second part respectively output an electric signal. The MEMS accelerometer resolves the problems that a traditional MEMS accelerometer is large in temperature factor and large in temperature hysteresis.

A superimposed braking driver of a normally closed type brake comprises a driver (1), the external end of a push rod (7) is used for connecting a driving arm (8) in a braking part by hinge shaft so as to act on the braking part (9), a superimposed braking mechanism which can lead the braking part to realize superimposed braking is arranged, and the superimposed braking mechanism acts on the braking arm (10) in the braking part (9) by a corresponding component; the superimposed braking mechanism can adopt a plurality of structures like a superimposed braking mechanism (11a) or a superimposed braking mechanism (11b) or a superimposed braking mechanism (11c). By operating the driver (1) individually, the openness and restoration of the normally closed brake can be realized, and according to requirement, the superimposed braking mechanism can be operated individually to realize the superimposed brake; and the working process of the openness and restoration of the normally closed brake can be applied to a working condition with frequent braking individually to lead the normally closed brake and the superimposed brake to be in a working process of a braking mode, and can be applied to a more stable and reliable braking.

The invention relates to an orthodontic molar C-shaped open band ring and a manufacturing method thereof. The orthodontic molar C-shaped open band ring is an orthodontic molar anchorage device and consists of a cheek side face, a tongue side face, a distal surface, a section extending from a mesiobuccal axis angle position to a mesial surface, a section extending from a near tongue axis angle position to the mesial surface, a buccal tube and an overflow hole. The orthodontic molar C-shaped open band ring has a C-shaped band ring structure. The orthodontic molar C-shaped open band ring is combined with teeth by adhesive, and surrounds the dental crowns of the molars. The orthodontic molar C-shaped open band ring is available in big, middle and small sizes and can be fit with the shape of the crowns of the molars easily and can be regulated according to the micro shape differences between the teeth. When the orthodontic molar C-shaped open band ring is used, the complex and pain caused by tooth separation before orthodontic fixing can be avoided, the adhesion strength of the band ring and the crowns of the molars can be improved, the fixing is permanent, the loosening of the band ring is prevented, diagnosis times are reduced, the problem of tooth gap residue when the band ring is removed after the treatment is accomplished is solved, and blockage by food is avoided.

The invention relates to a printed matter surface automatic laminating robot. The printed matter surface automatic laminating robot comprises a bottom plate, a mounting frame, a conveying device, a fixing device and a laminating device. The conveying device is mounted on the bottom plate, the fixing device is arranged on the front side of the conveying device, the mounting frame is arranged on theupper side of the conveying device, an auxiliary sliding groove is formed in the mounting frame, both the fixing device and the mounting frame are mounted on the bottom plate, and the laminating device is mounted at the lower end of the mounting frame. The conveying device comprises a conveyor, a fixing plate, a positioning air cylinder, a positioning plate, a spring and an auxiliary frame. The fixing device comprises a telescopic lifting plate, a fixing mechanism and a rotating mechanism. The problems that in the existing prismatic product laminating process, the laminating difficulty is high, the laminating effect is not ideal, and the working stability and the adjustability are poor can be solved, the function of automatic laminating of prismatic products can be achieved, and the printed matter surface automatic laminating robot has the beneficial effects that the laminating difficulty is low, the laminating effect can be improved, and the stability and the adjustability are good.

The invention provides a shock-absorbing base, which includes a bottom surface and a side wall. A lower support plate is provided on the upper end of the bottom surface, and the lower support plate and the side wall are connected by a plurality of transverse compression springs; the lower support plate A groove is arranged on the groove, and a lower magnet is arranged on the groove, and the lower support plate is connected with the upper support plate through a longitudinal compression spring, and the upper support plate is connected with the side wall; the lower part of the upper support plate An upper magnet is provided, a gap is provided between the upper magnet and the lower magnet, and the upper magnet and the lower magnet are arranged opposite to each other with the same magnetic poles. The invention can reduce the vibration from the horizontal and vertical directions, and reduce the noise when the equipment is running; it can bear heavy weight, is not easy to break, and has a simple and reasonable structure.

The invention relates to a composite material closed boxcar which comprises a box body, wherein the box body consists of an outer layer, a middle layer and an inner layer. The outer layer consists of a gel coat layer and a structure layer, wherein the middle layer consists of a metal frame and a sandwich glass steel plate, the inner layer is the structure layer, and the structure layer consists of a plurality of polyester resin layers and a fiber layer; and all the layers are connected by using adhesive layers. The composite material closed boxcar has good luster, is colorable, simultaneously has the good performances of water resistance, chemical resistance, corrosion resistance, abrasion resistance, impact resistance and the like, further has toughness, rebound elasticity and good corrosion resistance, light weight and collision rebound elasticity, can effectively prevent small collision and also has the good functions of heat preservation, thermal insulation or anti-freezing property, impact mitigation and noise isolation. The composite material closed boxcar has the advantages of reasonable design, low production cost, easy fabrication, good effects of heat preservation and thermal insulation, strong anti-collision capacity and a wide range of applications.

The invention belongs to the technical field of information display, and particularly relates to a production sample making method of a flexible display panel. The production sample making method includes: adhering a flexible substrate and a carrier substrate, cutting the adhered combined substrate, primarily cutting the combined substrate with a pad flexibly and rigidly and secondarily cutting the edge of the same through an angle fixing device to obtain a production sample product. The production sample product is cut twice, so that no air gap is generated at the edge, adhering strength of the substrates during technical process is unaffected, and affection on production process of the substrates from edge burrs can be eliminated.

The invention discloses a window control system and method. The system comprises a sunroof motor, a sunroof control module, a body control module and a sunlight rain sensor. the sunroof control moduleis used for detecting the state of a sunroof through the sunroof motor, and for controlling the sunroof to be closed through the sunroof motor when receiving the sunroof closing signal sent by the body control module, and controlling the sunroof to be opened through the sunroof motor when receiving the sunroof opening signal sent by the body control module; the sunlight rain sensor is used for detecting the weather condition; the body control module is used for inputting the sunroof closing state signal / sunroof opening signal to the sunroof control module according to weather conditions. Thesystem can control the sunroof to be open when the weather is good, to keep the vehicle ventilated, and to control the sunroof to close when the weather is rainy and snowy, to prevent the impact of rain and snow on the vehicle.

A rotating cutting tool includes a single or multi-piece support part which has a cutting insert (14) fastened thereto and at least one guide insert (18) disposed on a circumferential wall (16). The at least one guide insert (18) has a plurality of guide sections (22) protruding furthest radially. A holding device (20) is at the height of the guide sections (22) axially and is offset from the guide sections circumferentially. The invention also provides the corresponding guide insert.

The invention relates to the technical field of bridge pier collision avoidance, and especially relates to a gravity type self-resetting pier anti-collision device structure. The anti-collision devicestructure comprises a bearing platform arranged outside a pier in a sleeving mode, a main body steel shell arranged on the edge of the top of the bearing platform, an anti-collision steel block, a supporting steel column and a weight block, the outer side wall and the upper surface of the main body steel shell are provided with a groove used for allowing the anti-collision steel block to be inserted in and an opening used for allowing the supporting steel column to be inserted in respectively, and the opening communicates with the groove; the top of the inner end of the anti-collision steel block is provided with a slope inclining downwards; the top of the supporting steel column is connected with the bottom of the weight block, and the bottom of the supporting steel column is provided with a first pulley which slides in cooperation with the slope; and at least one extension spring is arranged between the weight block and the upper surface of the main body steel shell. The device structure has the advantages of being low in material price, simple in structure, convenient to construct, suitable for old bridges and new bridges, capable of being repeatedly used, easy to detect and maintain, convenient to disassemble and the like.

The invention relates to the technical field of SQL databases, in particular to a multi-dimensional comprehensive database SQL auditing and optimizing method and system. The system comprises a WEB front end, a service background and a database, the WEB front end comprises a work order submitting module, a work order auditing module, an optimization recording module, a standard configuration moduleand a quality visualization module. The service background comprises an API service module, a data acquisition module, an SQL management module, an auditing engine module, an optimization engine module and a task scheduling module. The database comprises an audit intermediate library module, a test database module and an online database module, the SQL audit speed, the database structure optimization speed and the SQL optimization speed can be greatly increased, the daily work pressure of database DBA is reduced, and the influence of SQL performance hidden danger on the online environment iseffectively prevented.

The invention provides a feedforward feedback simulation method for a TRT blast furnace top pressure control stamping process. Through establishing a feedforward feedback simulation system and utilizing a simulation method for the blast furnace stamping process, the rating curve of a stationary guide blade is utilized in advance for feedforward control of the opening degree of the stationary guide blade during stamping, the set value of the top pressure and the feedback value are compared, a controlled variable is output for feedback control of the stationary guide blade, and commissioning in the simulation system can ensure a more reasonable control scheme, so that the influence of direct online testing of different control schemes on the normal operation of the blast furnace can be avoided.

The invention relates to a projector with an anti-blocking function. The projector comprises a main body, a lens and four supporting blocks, and further comprises an anti-blocking mechanism and a protection mechanism, the anti-blocking mechanism comprises a heat dissipation assembly and two auxiliary assemblies, and the protection mechanism comprises a protection plate, a rotating shaft, a connecting block, a supporting rod, two second bearings and two connecting assemblies. Each connecting assembly comprises a power rod, a gear, a rack and two movable rods. According to the projector with the anti-blocking function, through the anti-blocking mechanism, the function of cleaning a filter screen is achieved, the probability of blockage of the filter screen is reduced, the influence on heat dissipation work is prevented, and the reliability of equipment is improved; and through the protection mechanism, the function of shielding a lens is achieved, the probability that the lens is scratched is reduced, and the projection effect is prevented from being influenced, so that the reliability of equipment is improved.

A multiple variable valve lift apparatus may include a camshaft rotating by drive of an engine, at least two cam portions slidably disposed on the camshaft and rotatable together with the camshaft, and forming a high cam and a low cam, a valve opening / closing unit operated by one of the high or low cams, at least two operating unit movable along the camshaft to move the at least two cam portions along the camshaft, a control portion selectively moving the operating unit along the camshaft, a pin disposed at the control portion, and a guide rail formed in a groove shape on an exterior circumference of the operating unit such that the pin is insert therein and guiding relative movement of the pin according to rotation of the camshaft and the operating unit such that the operating unit is moved along an axial direction of the camshaft by the pin.

A cable-base sensor can detect a material level and temperatures of a material stored in a silo. The cable-base sensor comprises an electronic box, a cable, a stopper, and a signal processing module. The electronic box comprises a base and a space for containing the signal processing module, and a hole is formed through a bottom of the electronic box. The base is mounted in the bottom, and a tapered hole is formed through the base. A first end of the cable extents into the tapered hole and the hole, and spreads to form a cable bud. The stopper is a tapered block and pressed into the tapered hole for enforcing the cable bud to be sandwiched between the stopper and the base. The cable bud strengthens a connection between the electronic box and the cable for preventing damages from solid materials.

The invention relates to a compound rear protective plate of a truck. The rear protective plate is composed of a collision bumper and at least two steel plates, wherein the outermost layer of the steel plate consists of a gel coat layer, a structural layer, a gluing layer, a base coat layer and a steel plate layer; the steel plates are parallel to each other and gaps are arranged among the steel plates, and the gaps are larger than 2cm and smaller than 8cm; the gel coat layer is of neopentyl glycol-o-phthalate resin, the structural layer is composed a plurality of epoxy furan resin layers and fibrages, and both the gluing layer and the base coat layer take the epoxy furan resins as the major material; and the collision bumper is a hydraulic buffer. The rear protective plate has favorable gloss, colorableness and favorable properties such as water proofing, chemical resistance, corrosion resistance, wear resistance, impact resistance and the like, is light in weight and favorable in collision rebound resilience, can effectively prevent small impact and buffer huge impact and vibration, and simultaneously protects the collision bumper. To sum up, the compound rear proactive plate of the truck has the advantages of safety, high efficiency, light weight, corrosion resistance and beautiful appearance.

The invention discloses a repairing method of carved stone cave eaves of a stone cave temple. The repairing method of the carved stone cave eaves of the stone cave temple includes following steps: performing cleaning treatment on the damaged cave eaves of the stone cave temple; pouring grout into cracks of the damaged cave eaves and performing maintenance; inserting carbon fiber anchor rods into the damaged cave eaves; inserting stainless steel anchor rods into the damaged cave eaves; using stainless steel wires to lay a net on external reserved portions of a plurality of the stainless steel anchor rods so as to form an internal net; casting a formwork in situ and performing maintenance on the internal net area; using other stainless steel wires to lay the other net on the stainless steel anchor rods on the exterior of the internal net so as to form an external net; filling the external net area with antique mortar, and performing maintenance on the external net area; performing water prevention treatment on the surface of the external net area after being maintained so as to complete repair for the damaged of the damaged cave eaves of the stone cave temple. The repairing method of the carved stone cave eaves of the stone cave temple follows the principle of not changing original shapes of historic relics, and minimizing intervention and reversibility, patches and repairs the damaged carved stone cave eaves of the stone cave temple, effectively prevents a water disaster from influencing carved stone of the stone cave temple, and has significance for reducing weathering speed of the carved stone of the stone cave temple.

The invention discloses a protective pier for a highway bridge and a using method thereof. The protective pier comprises a first fixing ring, a second fixing ring, a connecting rod, two clamping rings and an inflation mechanism, and the bottom of the first fixing ring and the top of the second fixing ring are fixedly mounted through the connecting rod. According to the protective pier for the highway bridge, when a flood disaster occurs in an urban area, water enters the storage pipe fitting and chemically reacts with the effervescent disintegrant, a large amount of carbon dioxide gas is rapidly generated and enters each compression part, and the compression air bags extend outwards after being inflated and expanded to surround the outer side of the bottom of the pier; and when an automobile or other sundries floating along with water flow in flood collides towards the pier, the automobile or other sundries can be bounced away by the inflated and expanded compressed air bag, the problem that the pier is damaged due to collision of the automobile floating along with the flood is greatly avoided, and the expanded compressed air bag can also provide a safe shelter for nearby victims. And people falling into the flood can be rescued by the expanded compressed air bag.

The invention relates to a metal plate wire drawing system and a wire drawing technology of the system. The system comprises a bottom plate, a mounting frame, a conveying device and a wire drawing device, a mounting frame is installed on the bottom plate, and the wire drawing device is arranged on the mounting frame; the conveying device is arranged at the lower end of the wire drawing device, theconveying device is installed on the bottom plate, and the conveying device comprises a workbench, a guide rail, an electric sliding block, a storage frame, an extruding air cylinder, an extruding plate, a fixing plate, a lifting telescopic plate, a lifting air cylinder, an auxiliary frame and a limiting telescopic plate; the wire drawing device comprises a driving mechanism and a wire drawing mechanism. The metal plate wire drawing system can solve the problems that in an existing metal plate wire drawing process, only one metal plate can be processed at a time, the work efficiency is low and the moving stability is poor, the automatic wire drawing function of metal plates can be achieved, and the system has the advantages that two plates can be processed at a time, the work efficiency is high and the moving stability is high.

A mirror image shielding structure is provided, which includes an electronic element and a ground shielding plane below the electronic element. The shape of the ground shielding plane is identical to the projection shape of the electronic element, and the horizontal size of the ground shielding plane is greater than or equal to that of the electronic element. Thus, the parasitic effect between the electronic element and the ground shielding plane is effectively reduced, and the vertical coupling effect between electronic elements is also reduced. Furthermore, the vertical impact on the signal integrity of the embedded elements caused by the layout of the transmission lines is prevented.

The invention relates to a drilling system for a numerically-controlled machine tool spindle box and a heat dissipating method of the drilling system. The drilling system comprises a rack and a movingmechanism used for controlling the spindle box to move, and is characterized by further comprising a drilling device and a heat dissipating device, wherein the drilling device is mounted on the rack,controlled by a lifting module to rise and fall, and used for drilling holes in the spindle box; the heat dissipating device is mounted on the rack, and comprises a heat dissipating cavity, a heat dissipating body, at least one cooling cavity, a liquid injecting circulation port and a liquid discharging circulation port; the heat dissipating cavity is used for the movement of the output end of the drilling device; the heat dissipating body is provided with the heat dissipating cavity; the cooling cavity is arranged in the heat dissipating body; and the liquid injecting circulation port and the liquid discharging circulation port are arranged outside the heat dissipating body and communicate with the cooling cavity. The drilling system and the heat dissipating method have the beneficial effects that the use is stable and the precision is high.

The invention discloses an occlusion device for a porcelain tooth false tooth. The occlusion device comprises a base; a bottom tooth mold is arranged on the top surface of the base; a supporting seatis fixedly arranged on the side, located on the bottom tooth mold, of the base; a connecting block is fixedly arranged at the top end of the supporting seat; a movable groove is formed in one side ofthe connecting block; fixing rods are fixedly arranged on the two sides of the inner wall of the movable groove; and the bottom tooth mold and a top tooth mold are cobalt-chromium alloy porcelain teeth. Therefore, whether the bottom tooth mold is accurately matched with the top tooth mold or not can be conveniently inspected; the chewing process of a human body is simulated, the structure is simpler, operation is more convenient; and meanwhile, rare earth casting metal is added into the cobalt-chromium alloy porcelain teeth, so that the ductility is better, the friction force between an innercrown and an outer crown is better, sand holes are reduced, the surface is smoother, gingival tissue stimulation is reduced, and gingival atrophy and food impaction are effectively avoided, and abutment teeth are effectively protected.

The invention relates to a multifunctional sight protection device and an application method thereof, belongs to the technical field of sight protection devices, and aims at providing a hardware structure of the multifunctional sight protection device and improving an application method of the device. The device comprises a device casing, a light sensing module is arranged in the top of the devicecasing, an LCD display screen is arranged in the front side of the device casing, a supersonic range finding module and an acousto-optic alarm module are arranged under the LCD display screen, and control buttons and a power supply module are arranged in the bottom of the device casing; a control circuit board is arranged in the device casing, and a central controller is integrated on the controlcircuit board, and connected with the LCD display screen and control buttons via leads; the signal input end of the central controller is connected with the supersonic range finding module; and the signal output end of the central controller is connected with the acousto-optic alarm module.

The invention relates to the technical field of an advertisement board, in particular to intelligent typhoon-proof advertisement equipment and a control system thereof. The intelligent typhoon-proof advertisement equipment comprises an advertisement board, an advertisement post and a base, wherein the advertisement post is arranged on the base; the advertisement board is arranged on the top end ofthe advertisement post; the advertisement post is of a hollow post body structure; the advertisement board is foldable; and the advertisement board can be contracted into the advertisement post afterbeing folded. The intelligent typhoon-proof advertisement equipment and the control system have the advantages that the automation degree is high; the prediction is accurate; the response is fast andtimely; the work efficiency is high; the typhoon disaster can be intelligently detected; disaster protection can be automatically performed; and the influence of the disaster on the advertisement board can be effectively prevented.

The invention relates to guiding and draining side ditches made from building blocks. The guiding and draining side ditches are arranged on two sides of a road. Each guiding and draining side ditch atleast comprises a ditch bottom and ditch walls. The ditch bottom and the ditch walls form a side ditch with a cross section which is substantially trapezoidal. The ditch bottom forms a short edge, and the ditch walls form bevel edges of the side ditch. The side ditch is characterized in that each ditch wall comprises a ditch top and a side wall, wherein plants are planted in the ditch top facingthe side of the road and the ditch top far away from the side of the road in a staggered manner in a manner that the plants are irrigated conveniently. The ditch wall is formed by at least two types different building blocks. The two types of building blocks are capable of preventing a liquid from entering soil on a back side of the side ditch. The upper surfaces, protruding into the side ditch, of one type of building blocks are capable of absorbing and storing and keeping the liquid. The upper surfaces, protruding into the side ditch, of the other type of building blocks have structures thatdo not absorb the liquid but drain the liquid toward other building blocks on two sides, so that the ecological side ditch can adsorb harmful substances under a circumstance of leakage of the harmfulsubstances or can block and intercept the harmful substances when a lot of hazardous goods are leaked.

A Construction waste improved expansive soil roadbed structure comprises a roadbed surface layer and an expansive soil filling layer under the roadbed surface layer, wherein the expansive soil fillinglayer is arranged on a construction waste pore water protective cushion filling layer, inverted filter layers are arranged on both sides of the construction waste pore water protective cushion filling layer, and a construction waste improved soil filling layer is filled on both sides and above the expansive soil filling layer. The roadbed structure is reconstructed by adopting the mixed modification of construction waste in the expansive soil area and utilizing the non-uniform characteristics of the particle size of the broken construction waste, thereby reducing the engineering cost of the roadbed capillary water protection of the urban expressway, effectively utilizing the construction waste and reducing the environmental pollution at the same time.

The invention relates to a sand blasting machine with the impurity removal function. The sand blasting machine comprises a main body and a sand blasting device and further comprises an impurity removal mechanism and a drying mechanism, the impurity removal mechanism comprises a filter screen, a rotating ring, two shaking assemblies, two driving assemblies and a plurality of smashing assemblies, each smashing assembly comprises a nozzle, a fixing pipe and a plurality of sawteeth, and the drying mechanism comprises a rotating assembly, a stirring assembly, a connecting box, an impurity removal net, a power assembly, an air inlet pipe, an air outlet pipe and a plurality of heating rods. The sand blasting machine with the impurity removal function achieves the impurity removal purpose through the impurity removal mechanism, the probability that the sand blasting device is blocked by impurities is reduced, and therefore the sand blasting work cannot be affected, and the reliability of equipment is improved; and by means of the drying mechanism, the drying function is achieved, the situation that the sand blasting device is blocked due to the fact that materials affected with damp cake is prevented, and therefore the influence on normal sand blasting is avoided, and the reliability of the equipment is improved.

The invention provides a feedforward control simulation method for a TRT blast furnace top pressure control material distribution process and a system therefore. Blast furnace material distribution is a disturbance that can be known in advance, so that the opening degree of a stationary guide blade can be controlled in advance through the analysis of the material distribution process to eliminate the influence of material distribution on the blast furnace top pressure. During material distribution, the porosity of a material surface is reduced when a furnace material reaches the material surface, so that the air permeability of the material surface is decreased, and coal gas flow resistance is increased. Therefore, the flow of coal gas reaching the furnace top is reduced, and a plunge in the furnace top pressure occurs if the opening degree of the stationary guide blade is unchanged. Feedforward control includes the parallel steps of calculating the decrease in coal gas flow according to furnace material type, the timing, gear and interval of material distribution and the like and calculating the opening degree of the stationary guide blade corresponding to the decrease in coal gas according to the rating curve of the stationary guide blade. The curve is utilized to control the opening degree of the stationary guide blade in advance during material distribution, so that the influence of material distribution on the furnace top pressure can be eliminated.