47results about How to "Avoid structural deformation" patented technology

The utility model relates to the technical field of tower cranes, and discloses a telescopic external hanging beam of an internal climbing type tower crane, which comprises a crane standard knot and a connecting frame fixedly arranged at the outer edge of the crane standard knot, and one end of the connecting frame far away from the crane standard knot is movably connected with a telescopic rod. A main connecting piece is fixedly mounted at the end, away from the connecting frame, of the telescopic rod, a first mounting piece is movably connected to the end, away from the telescopic rod, of the main connecting piece, and a side connecting piece is fixedly mounted on the side, away from the telescopic rod, of the connecting frame. According to the telescopic external hanging beam of the internal climbing type tower crane, in the construction process, according to the actual operation requirement, the telescopic length of the side telescopic column is adjusted, then the side telescopic column and the side telescopic column are welded or limited through other fixing pieces, and the lateral supporting range of the external hanging beam can be changed; and the included angle between the side telescopic column and the connecting frame can be reduced, so that multidirectional fixation can be provided, and the deformation resistance of the side telescopic column can be improved.

This invention discloses a double-helix composite blade long-diameter-maintaining coring drill bit and its manufacturing method, belonging to the field of geological drilling coring equipment. The drill bit includes a drill bit steel body, double-helix composite blades, and a coring inner cylinder. The double-helix composite blades are arranged in a double-helix staggered distribution, including polycrystalline diamond cutting blades and surface-impregnated diamond grinding blades. The polycrystalline diamond cutting blades have a three-dimensional helical forward-inclined structure, embedded with frustum-shaped polycrystalline diamond sheets and triangular polycrystalline diamonds. The surface-impregnated diamond grinding blades have an axial helical structure, equipped with low-temperature surface-impregnated matrix blocks and surface-impregnated large diamond particles. The outer wall surface of the blades is equipped with a helical long-diameter-maintaining structure. The manufacturing method integrates three processes: pressureless impregnation, hot-pressing sintering, and brazing, to prepare the blade matrix base and the surface-impregnated matrix blocks respectively, and then weld them into shape. This invention, through optimized structural design and multi-process synergy, significantly improves the coring efficiency, wear resistance, and structural stability of the drill bit in complex formations, achieving long-term diameter maintenance and high-efficiency drilling.

The utility model belongs to the technical field of petroleum workover equipment, concretely relates to a hydraulic tong station adjusting device and workover equipment, including the adjusting frame and the chassis, the longitudinal beam that sets up two hydraulic cylinders in the middle part of chassis is hinged, the piston rod end of two hydraulic cylinders all is hinged on the adjusting frame, the adjusting frame is driven its rotation around the axis of articulation shaft and drives hydraulic tong swing relative to the chassis by the piston rod telescopic drive of hydraulic cylinder, when the adjusting frame swings to the second end of chassis, and the limit support that this end of chassis is perpendicular fixed limits the contact. The utility model has realized the continuous, stable and automatic swing switching of hydraulic tong from the work position to the retreat position, reduced the strength of manual operation, improved the operation efficiency, reduced the operation error and the security risk caused by human factor, ensured that the hydraulic tong in non - working state, the equipment can absolutely stably keep in the retreat position, satisfied the extreme requirement of safety of wellhead unmanned operation.

The utility model discloses a power device double-string crimping structure for a converter valve, which relates to the field of flexible direct-current power transmission and comprises an IGBT (insulated gate bipolar transistor) voltage string and a diode voltage string, the IGBT voltage string is composed of a plurality of IGBTs and a first radiator which are stacked in a staggered manner, and the diode voltage string is composed of a plurality of diodes and a second radiator which are stacked in a staggered manner. The IGBT voltage string and the diode voltage string are parallel to each other and are connected through a supporting structural member to form a double-string crimping structure, the second radiator is provided with a protruding structure, the protruding structure is located on the outer side of the bottom of the double-string crimping structure, the first copper bar and the voltage-sharing resistor are installed on the protruding structure, and the second copper bar and the voltage-sharing resistor are installed on the protruding structure. The second copper bar is installed between the first radiator and the second radiator and corresponds to the installation position of the first copper bar, the third copper bar and the laminated busbar are sequentially installed on the side face of the double-string crimping structure in an overlapped mode, the third copper bar corresponds to the installation position of the first copper bar, the pipeline assembly is connected with the adjacent first radiator, and the pipeline assembly is connected with the second radiator. And the adjacent second radiators are connected.

The application discloses a 505 / 95R29 special high-load radial tire for nonferrous mine and a production process thereof, and relates to the technical field of tires. The application is characterized in that a concave V-shaped structure is arranged at the tire shoulder and the tire side, the transverse pattern groove of the tire tread extends to the tire side and is provided with a heat dissipation groove; the ring part is designed with full interference and is provided with anti-skid protrusions; a five-layer belt structure is adopted, the B1 belt layer is a two-piece small-angle split structure, and nylon reinforcing layers are arranged on both sides of the tire body. The application fills the design and development blank of the 505 / 95R29 special high-load radial tire for nonferrous mine by developing a new 505 / 95R29 special high-load radial tire for nonferrous mine and adopting a new production process, and solves the problems of insufficient load capacity of the current product of the large-tonnage wide-body vehicle and high failure.

The utility model discloses a single-position lazy sofa. The single-position lazy sofa comprises a lazy sofa main body, by adopting the contact cloth, the hook-and-loop fastener thorn surface and the hook-and-loop fastener loop surface, the replaceable contact cloth is adhered to the outer side of the air bag through the hook-and-loop fastener structures of the hook-and-loop fastener thorn surface and the hook-and-loop fastener loop surface during use, and the contact cloth can be made of different fabrics such as fluff fabrics or breathable fabrics. The detachable structure not only facilitates subsequent cleaning and maintenance of the sofa by personnel, but also can meet the requirements of the personnel in different seasons, the relatively thick fabric is selected in winter to prevent the personnel from catching cold and improve the warm keeping effect, and the breathable fabric is adopted in summer to facilitate heat discharge and avoid discomfort of the personnel. The whole sofa is matched by multiple groups of different structures, so that the use requirements of personnel can be enriched, the use effect is improved, better popularization and use are facilitated, and the sofa has the advantages that the contact layer is replaced, and the sofa is convenient to clean.

The utility model relates to a water supply sewage treatment filtering device which comprises a supporting assembly and a filtering barrel rotationally arranged on the supporting assembly, a barrel is coaxially arranged in the filter barrel, an annular filter cavity is formed between the barrel and the filter barrel, an annular sealing plate is arranged above the cavity, a plurality of layers of concentric circle filter materials are arranged in the cavity in the radial direction, and through holes communicated with the annular filter cavity are formed in a barrel body of the filter barrel and the barrel. 4-12 blades are arranged on the upper portion of the inner wall of the barrel in a circumferential array mode, an end cover is coaxially arranged above the barrel through a bearing, a water inlet is formed in one side of the end cover and connected with a water pipe, the water outlet direction of the water pipe is tangent to the inner wall of the side face of the end cover, and tangential water outlet is matched with the blades to drive the filtering barrel to rotate. The bottom of the filter barrel is conical or arc-shaped, and a drain outlet is formed in the center. The device solves the problems that a traditional filtering device is low in efficiency and needs extra power, hydraulic self-rotation driving and multi-stage annular filtering without external power are achieved, the filtering effect is remarkably improved, and the operation and maintenance cost is reduced.

This utility model discloses an electric vertical takeoff and landing manned aircraft, including an aluminum alloy frame, a vibration damping assembly, a right guardrail connected to one side of the aluminum alloy frame, and a left guardrail connected to the other side via a pivot seat. The vibration damping assembly includes a first carbon fiber tube and a vibration damping seat fitted on the first carbon fiber tube. The upper and lower vibration damping seats are fastened with bolts through the penetration between the first carbon fiber tube and the aluminum alloy frame. The rubber vibration damping pad absorbs high-frequency vibration energy through its own elastic deformation, effectively blocking the direct transmission of vibration to the frame. The axial anti-roll bracket forms an elastic clamp on the sleeve through rubber clips. This clamping force can be flexibly adjusted by the hardness of the rubber clips, which greatly reduces the vibration felt in the cockpit area. Both the first and second carbon fiber tubes are made of carbon fiber composite material, which has a weak ability to reflect sound waves and can reduce the transmission efficiency of propeller aerodynamic noise.

The present invention provides a battery pack, the structure of the battery pack, and a method for manufacturing the same. The battery pack includes: a battery module; a battery pack housing defining an internal space for accommodating the battery module; a first valve disposed in the battery pack housing to selectively connect the interior and exterior of the battery pack housing; and a support member supporting the battery pack housing from the interior. The battery pack housing is sealed such that when the first valve is closed, gas is prevented from entering and leaving the battery pack housing.

The utility model discloses a special lifting appliance for an emergency rescue small car, and relates to the technical field of emergency rescue equipment. The clamp comprises a hanging belt and a clamp, the clamp comprises a lower clamp and an upper clamp, the lower clamp and the upper clamp are symmetrically distributed, the opposite sides of the lower clamp and the upper clamp are provided with belt penetrating grooves, one end of the hanging belt movably penetrates through the belt penetrating grooves, the end, close to the clamp, of the hanging belt is sleeved with a hanging ring, and a wooden wedge is movably inserted into the hanging ring; a lifting opening is formed in the end, away from the clamp, of the lifting belt. The situation of secondary damage caused by traditional clamping hoisting is avoided through non-contact geometric connection, loads are dispersed through a wide contact surface of the clamp, the hoisting belt does not make contact with a vehicle body frame, in this way, structural deformation of a vehicle is avoided, the hoisting belt, the clamp, the hoisting ring and other modular independent design can shorten the installation time of the hoisting belt, and the hoisting efficiency is improved. And meanwhile, the working conditions of narrow spaces such as narrow channels are modularly adapted, so that the application range of the lifting appliance can be expanded.

The utility model discloses a tobacco clamp tobacco hanging frame which comprises a tobacco hanging frame assembly, supporting frames and supporting plates, the supporting frames are arranged at the lower end of the rear side of the tobacco hanging frame assembly, and the supporting plates are arranged at the front end of the tobacco hanging frame assembly at equal intervals. According to the tobacco clamp tobacco hanging frame, through mutual structural combination of the main frame body and the inclined supporting components, the overall structural strength of the device can be guaranteed, meanwhile, the whole tobacco hanging frame assembly can be fixed to the inner ground of a curing barn as much as possible in cooperation with the auxiliary supports and the stable angle plates at the bottoms of the side edges, and the curing barn is more convenient to use. According to the tobacco hanging frame assembly, the supporting frame is arranged to ensure the hanging stability and the structural supporting performance of the tobacco clamps, the structural stability of the whole tobacco hanging frame assembly can be further guaranteed through the supporting frame, the supporting frame provides supporting, meanwhile, the bearing performance of the tobacco hanging frame assembly is guaranteed, meanwhile, the structures have convenient structural splitting performance, and the tobacco hanging frame assembly is convenient to use. Structural adjustment and combination can be carried out according to selection, so that the use convenience and flexibility of the whole device are ensured.

The utility model relates to the technical field of building construction, and disclose a kind of side-mounted no column stair aluminum alloy glass handrail fixing device. The device adopts modular design, including glass handrail fixed plate, clamping groove, middle decorative cover plate, lower decorative cover plate, U-shaped rubber pad, wedge-shaped rubber strip, and is connected with wall body by expansion bolt to form stable support structure. The device takes aluminum alloy fixed plate as main force component, combines A / B double-piece hollow clamping groove and plum-blossom-shaped expansion bolt layout, realizes the balance of light weight and high strength. The wedge-shaped rubber strip and the self-adapting clamping system formed by U-shaped rubber pad of the device can compensate for glass thickness tolerance and effectively reduce metal collision noise. The device uses welding-free installation process, and is matched with anodized decorative cover plate. It is suitable for various architectural styles, maintenance is more convenient, and safety and aesthetic evaluation are better.

The utility model relates to the technical field of decoration, and provides an integral corner profile structure suitable for multiple working conditions of a wallboard, when a corner is closed up, the part of a closed-up edge at a bending area can be bent according to the size of the corner, so that the bending area can cover the corner, and a locking piece is propped against a wall surface at the corner; meanwhile, the first fixing edge and the second fixing edge are attached to the two adjacent wall faces of the corner respectively; then, one end of the wall plate is clamped into the insertion grooves in the two sides, and the locking piece is fixed to the end face of the wall plate. Therefore, by means of bending of the closing edge in the bending area, the sectional material structure can be suitable for closing of different corners, and extra cutting and splicing are not needed. Therefore, the construction operation difficulty is reduced, material waste is reduced, and the closing-in delivery requirement is met. Meanwhile, in the fixing process, the wallboard is rapidly and stably installed on the sectional material structure through the inserting grooves and the locking pieces, and therefore the construction time is shortened, and the rework rate is reduced.

The utility model discloses a lighthouse hoist device, including hoist subassembly, box and support subassembly, hoist subassembly is located on the box, and the box is located on the support subassembly, hoist subassembly includes support frame, connecting frame and hoist connecting piece, and the bottom end of support frame is fixedly through the inner chamber of box, and connecting frame is fixed to the top of support frame's outer surface. Through the integration design of hoist subassembly and box, utilize the triangular support structure that L shape support frame formed with the inner wall of box, will traditional single point stress mode convert into three -dimensional face load conduction, the utility model makes the anti -overturning performance of device promotion when hoisting operation, effectively avoid the structural deformation caused by uneven force, guarantee the safety of hoisting process, the fixed mode of L shape support frame through the box and the stepped layout of connecting frame, form short path, low -loss force transmission system.

The utility model relates to the technical field of building construction, in particular to an outer wall window construction node structure which comprises an outer wallboard, an outer window and a reinforced concrete floor, a positioning column is installed on the surface of the side, facing the outer wallboard, of the reinforced concrete floor, and a buffer layer is installed between the reinforced concrete floor and the outer wallboard. The buffer layer is arranged to actively absorb stress, direct acting force on the external wall board is reduced, and therefore the cracking risk of the mortar layer is reduced.

This utility model relates to the field of waterproofing technology, specifically a drainage structure for walls. It includes a triangular waterproofing body cast at the base of the outer wall, with a right-angled triangle vertical cross-section. The longer right-angled face is connected to the wall sidewall via a waterproof coating layer. A stepped water-retaining reinforcement plate is inserted into the foundation soil at the bottom of the triangular waterproofing body. Multiple parallel inclined water-guiding channels are formed inside, with a waterproof layer on the inner wall of each channel. The bottom connects to a transfer chamber, which is connected to an external drainage system via a drainage pipe. This utility model uses the stepped water-retaining reinforcement plate to block water and enhance stability, while the water-guiding channels collect seepage water and actively discharge it through the drainage pipe. Combined with multiple waterproof layers and a waterproof coating layer, it solves the problem of wall seepage at its source, improving waterproofing durability and structural stability.

The invention provides a waterproof marine communication cable and a preparation method thereof, and belongs to the technical field of cable processing, the waterproof marine communication cable comprises a conductor and the following functional layers sequentially coating the conductor from inside to outside: a polyethylene composite insulating layer, a rubber composite waterproof layer, a modified filling layer, a compatible flame-retardant layer, a low-temperature toughening lining layer and a salt mist resistant outer sheath layer; the method comprises the following steps: respectively performing premixing and secondary blending granulation on raw materials of each functional layer, and then performing synchronous co-extrusion coating, vacuum filling compaction, hot-pressing compounding, layered coating, segmented cooling and performance testing, and screening to obtain a qualified cable. The marine communication cable effectively solves the problems of moisture invasion, interlayer stripping, structural deformation, low-temperature embrittlement, salt mist resistance, imbalance in flame retardance and the like of an existing marine communication cable, the comprehensive service performance and reliability of the cable are remarkably improved, and the marine communication cable adapts to the harsh use environment of a ship.

The utility model relates to the technical field of roadbed engineering, concretely relates to a truss type help wide structure of roadbed, including support truss and replacement foundation, support truss sets up in one side of existing roadbed and with the existing roadbed is adapted, replacement foundation sets up in the below of support truss, replacement foundation is used for carrying support truss to avoid the settlement of support truss, support truss can bear upper load to avoid structural deformation. The utility model uses the support truss of rigid frame structure as the main frame of help wide structure, has enough rigidity to resist upper load, can avoid structural deformation, and then avoids the settlement due to the insufficient rigidity of structure itself, adopts the replacement foundation of light replacement material, and the bearing capacity of support truss and its upper load is better, can avoid the settlement of support truss and its upper load compression replacement foundation to the greatest extent.

A vertical shaft ring-shaped steel support structure, including support ring, the outer side of support ring is fixedly installed multiple support legs, the bottom end of support leg is fixedly installed bottom plate, the top end of bottom plate is fixedly installed U-shaped seat, the U-shaped seat is rotatably installed threaded rod between support ring, the threaded rod is threadedly installed sliding plate, one side of sliding plate is fixedly installed support rod, one end of support rod is slidably penetrated in support ring and is fixedly installed support plate, one end of threaded rod is installed with drive assembly. The vertical shaft ring-shaped steel support structure can solve the poor adaptability, the difficulty of flexible adjustment of the scraper and the inconvenience of replacement, limit the construction quality and efficiency, flexible connection with the main equipment, height adjustable; can adapt to different road width and corner scene, can quickly replace different material, shape scraper, adapt to various concrete finishing needs.

This utility model discloses a fluid pump control box and its mounting structure with the pump body, belonging to the field of pump units. In the control box of this utility model, a mounting recess area is provided on the bottom wall of the box body, recessed towards the box cover. The mounting recess area is used for the mounting end of the pump base to fit into. The shaped wall surface of the mounting recess area forms an upwardly protruding inner boss in the inner cavity of the box body. A low mounting area is formed between the inner boss and the box cover, and a high mounting area is formed between the area outside the inner boss and the box cover. The low mounting area is used for the distribution of small-volume components on the power control board, and the high mounting area is used for the distribution of large-volume components on the power control board. This utility model breaks through the limitations of the traditional stacking mode of the control box and pump base, helping to reduce the overall size of the pump and improve space adaptability and installation convenience.

The utility model discloses a movable smoke hood lifting mechanism of converter relates to movable smoke hood lifting mechanism technical field of converter, include: converter platform, the outer surface top rear part of converter platform is installed with the sealed cabin, the outer surface of sealed cabin is provided with ceramic coating, and the inside bottom of sealed cabin is provided with the notched, the inside front section of sealed cabin is installed with the hydraulic cylinder, the outer surface top of hydraulic cylinder electrically installs hydraulic drive unit, through the full -seal hydraulic drive and chain drive design, effectively avoids the problem that traditional screw rod is easy to jam. The sealed cabin is covered with ceramic coating, the hydraulic cylinder and the hydraulic drive unit form the full -enclosed structure in the inside, the high temperature dust erosion is isolated, compared with exposed type drive motor, the service life is prolonged, adopts chain cooperation double runner (first runner, second runner) transmission simultaneously, eliminates the risk of occlusion of screw pair because of dust accumulation, ensures that still can steady operation under 1200 DEG C flue gas environment.

The utility model discloses a copper-nickel composite busbar of a high-power lithium battery pack of a cross-country motorcycle, which comprises a copper-nickel composite busbar body, a connecting component is arranged on the copper-nickel composite busbar body, and a protective component is arranged on one side of the copper-nickel composite busbar body. According to the copper-nickel composite busbar, the connection stability is ensured, the connection looseness is effectively prevented, the connection reliability can be kept even in the severe environment of vibration or impact, meanwhile, the protection assembly arranged on the copper-nickel composite busbar body can effectively absorb vibration and impact, buffer protection is provided for the busbar, and the service life of the busbar is prolonged. Connection looseness or structural damage caused by external impact is prevented, the stability of the busbar in a severe environment is ensured, and damage of excessive vibration to the busbar is avoided.

The application discloses a super-deep buoyancy type large double-wall steel hanging box in severe sea conditions, which comprises A section wall body, B section buoyancy cabin and C section wall body which are rigidly connected in sequence from bottom to top, and watertight sealing structures are arranged between the sections. A construction method of the super-deep buoyancy type large double-wall steel hanging box in severe sea conditions comprises the following steps: S1, prefabrication and processing; S2, section assembly; S3, floating and positioning; S4, bed fixation; S5, tide adaptation debugging; S6, bottom sealing concrete construction; S7, buoyancy conversion; S8, completion detection. The application effectively resists the erosion of high-speed water flow in super-deep water area to the base; four groups of pressure sensors arranged at the bottom can monitor the base contact stress in real time, ensure that the steel hanging box is uniformly stressed after bed fixation, and significantly improve the anti-sliding and anti-inclination stability of the structure in severe sea conditions, and reduce the safety hidden danger caused by the base erosion.

The invention discloses a forming mold and an exposure lamp shell production line, and belongs to the technical field of exposure lamp production. The exposure lamp shell production line comprises a conveying mechanism, a machining mechanism and a forming mold. The forming die comprises an upper die, a middle die and a lower die, the upper die is provided with a first forming part serving as a male die, the middle die is clamped with the lower die, and a second forming part of the middle die and a third forming part of the lower die form a female die; the conveying mechanism comprises a rotating table, and eight lower dies are evenly arranged at the top end of the rotating table in the circumferential direction. The machining mechanism comprises a feeding unit, a pressing unit, a cooling unit and a discharging unit which are sequentially arranged in the rotating direction of the rotating table. The discharging unit and the cooling unit are located on the same diameter of the rotating table, and the pressing unit is provided with a water cooling valve, so that semi-finished products are subjected to water cooling, air cooling and air cooling. By optimizing the forming process and the mold structure, the product consistency and the yield are effectively improved while the operation efficiency of a production line is improved.

This utility model relates to a novel automated continuous solid waste feeding system. The system includes a crushing device, a material conveying device, a pushing device, and a discharge device. The material conveying device transports the crushed material to the pushing device, which then pushes the material to the discharge device. The discharge device includes a discharge housing with a vertical discharge chamber inside. A vertical push cylinder is installed at the top of the discharge chamber, and a push plate is installed at the lower end of the push cylinder. A level detection device and a spray device are installed inside the discharge chamber. The spray device includes a temperature sensor and a spray system. The lower end of the discharge chamber is a discharge outlet for connecting to an incinerator. A discharge valve for opening and closing the discharge outlet is installed at the discharge outlet, and the level detection device is electrically connected to the discharge valve. The temperature sensor, spray system, and push cylinder improve safety. The level detection device, in conjunction with the discharge valve, enables orderly and automatic feeding, solving problems such as material jamming and backfire ignition during the feeding process.

The utility model relates to the technical field of preparation mould, disclose a preparation mould of integral type seat surface cover, including open and close upper die and lower die, the upper die and the lower die close form the cavity for foaming forming, be equipped with the positioning structure for fixed surface cover peripheral on the lower die, just be equipped with the compaction structure between the upper die and the lower die, the compaction structure is along the cavity peripheral arrangement, and has the compaction surface that is located the cavity outer periphery and extends continuously along the periphery, when the upper die and the lower die close, the compaction surface and the lower die peripheral surface or the upper die peripheral surface jointly hold the surface cover peripheral area, and form continuous surface contact with the surface cover peripheral, the utility model has the advantages of accurate positioning, reliable sealing and convenient operation maintenance.

The universal power saver comprises a machine body and cables inserted into the two ends of the machine body, pressing plates are movably connected to the four corners of the front face of the machine body through pin shafts, and the sides, away from the machine body, of the pressing plates extend to the two ends of the machine body and make contact with the surfaces of the cables. A transmission structure is arranged on the front face of the machine body, the transmission structure can control a pressing plate to swing and extrude and fix a cable, the transmission structure comprises a connecting frame fixedly connected to the front face of the machine body, the interior of the connecting frame is movably connected with a two-way screw through a bearing, and the two sides of the surface of the two-way screw are both in threaded connection with threaded sleeves. The pressing plates exert physical clamping force on the cable through swinging, compared with a traditional inserting mode, cable falling caused by vibration of a welding machine can be resisted, symmetrical clamping force is formed by the pressing plates distributed at the four corners, and cable deflection or local abrasion caused by uneven single-point stress is avoided.

The utility model discloses a swing arm dismounting and mounting device of a vibrating conveyor, and relates to the technical field of tobacco machinery, the swing arm dismounting and mounting device comprises a base, a clamping mechanism and two groups of symmetrically arranged tensioning mechanisms; the clamping mechanism comprises a fixed clamping plate and a movable clamping plate which are stacked; each tensioning mechanism comprises a supporting seat connected with the base, a tensioning arm arranged on the supporting seat in a sliding mode and an adjusting assembly connected with the tensioning arm. In the using process, a clamping space formed by the fixed clamping plate and the movable clamping plate clamps a rack, the free ends of the two tensioning arms abut against the end faces, close to each other, of the groove body and the balance body correspondingly to form limiting, dynamic supporting is provided in the whole swing arm disassembling and assembling process, the three centering states are kept, and the traditional knocking and crowbar force applying mode is thoroughly abandoned; and equipment structure deformation caused by external force impact is avoided.