37results about How to "Reduce side to side swing" patented technology

This is a method used to produce long span spread chord truss. It contains: To weld the belly rod on the upper spread chord rod, put the formed upper chord rod on the wording platform, fix the two ends of this chord rod on the fixed seat, then connect lower end of the belly rod with cover joint pipe, and between two cover pipes beforehand put a lower chord steel pipe. The steel rope pierce through every joint cover pipe and every lower chord steel pipe, then to spread out the steel rope, on the steel rope at the spreading straight, state weld every lower steel pipe with every joint cover pipe, keep the steel rope spread out straightly, then loose the two ends of the upper chord rod from platform, then long span spread chord truss is finished.

The invention discloses a building damping device. The building damping device comprises a damping structure. The damping structure comprises a base which is embedded into the inner central position of a certain section inside a building and a swing assembly which is hung on the base. The swing assembly comprises a swing arm which is connected with the base in a rotating mode and a pendulum bob which is mounted beneath the swing arm. The building damping device further comprises an energy dissipation mechanism which is connected with the pendulum bob. The building damping device is simple in structure, convenient to manufacture and construct, and capable of achieving the purposes of balancing the building and reducing the left-right swing scope of the building and consumed energy under the condition that earthquakes are small.

Provided is a method for manufacturing an optical film having such a double refraction as can be used as the polarizing plate protecting film or the like for a liquid crystal display device (LCD). Even in case a wide belt support is used for the film production, the optical film manufacturing method can keep a less meandering stable transfer state to eliminate the poor drying of cast film (or web) end portions or the deterioration of a film flatness thereby to achieve a stable high productivity. In the manufacture of the optical film according to a solution-casting film forming method, the belt support has a width of 1.8 m or more, and the thickness (Te) of the two right and left end portions having a width (We) of 2 to 25 % of the whole belt support width (W) from the two side edges is smaller by 5 to 20 % than the thickness (T) of the remaining portion containing the widthwise central portion of the belt support. Alternatively, the modulus (Ee) of longitudinal elasticity of the two right and left end portions of the belt support is smaller by 5 to 20 % than the modulus (E) of longitudinal elasticity of the remaining portions containing the widthwise central portion of the belt support.

The invention discloses a support structure ofa seat, which comprises a tray bracket and a seat plate arranged on the tray bracket.A swing assembly is arranged between the tray bracket and the seat plate and characterized in that the swing assembly comprises an upper substrate and a lower substrate arranged in an up-and-down mode, the upper substrate is fixedly connected with the bottom of the seat plate, the lower substrate is fixedly connected with the top of the tray bracket, an elastic member and a plurality of connecting members are arranged between the upper substrate and the lower substrate, the upper ends of the connecting members penetrate the upper substrate and limit the upward movement of the upper substrate, the lower ends of the connecting members penetrate the lower substrate and limit the downward movement of the lower substrate, the plurality of connecting members are arranged in a straight line front and back, and the elastic member is arranged around the connecting members.The plurality of connecting members are arranged onthe swing assembly of the support structure of the seat, the plurality of connecting members are arranged in a straight line front and back, so that the seat can be swung left and right, the front and rear swing of the seat can be limited, and thus the front and rear swing of the seat is reduced.

The invention discloses a back pressure valve and belongs to the technical field of drilling equipment. The back pressure valve comprises a valve body, a valve element, a bearing seat and a valve seat and is characterized in that the bearing seat and the valve seat are arranged in the valve body, the bearing seat is located below the valve seat, a piston is arranged in the valve body and sleeves the valve element, a slurry return hole is formed in the valve body and located between the valve seat and the piston, and the slurry return hole is communicated with the inner cavity of the valve body. The back pressure valve has the advantages that slurry in a well can be automatically filled into a drill pipe, a slurry filling device needs not to be connected to fill the slurry into the drill pipe after each drill pipe part is descended, work amount is reduced greatly, time and labor are saved, slurry filing cost is lowered effectively, the slurry in the well can be prevented from being reversely sprayed into drill pipe through the inner cavity of the valve body, and safety accidents are avoided.

The invention discloses a truss string structure internally provided with inclined guy ropes. The truss string structure comprises a top chord, a web member, knot sleeves, a lower cable and the inclined guy ropes, wherein the top chord is connected with the web member in a penetrating manner by way of welding, the lower end of the web member is connected with the knob sleeves, the lower cable penetrates through both rear ends of each knob sleeve and is fixed on support knobs at both ends respectively, the inclined guy ropes are symmetrically arranged, the lower ends of the inclined guy ropes are fixed on the support knobs and the upper ends of the inclined guy ropes are connected with the fixed knot of an upper cable; the fixed knot of the upper cable can be any intersection point between the top chord and the web member in a span scope of the truss string structure which is 1 / 5 to 1 / 3 far from adjacent support knobs. A pre-tress system which can provide bidirectional resistance is formed by the lower cable and the inclined guy ropes and the system can be suitable for wind suction loads. The truss string structure disclosed by the invention further has the advantages of small use level of steel products, simple structure, low preparation cost, good performance, easy construction and the like.

The invention discloses a backpressure valve capable of achieving automatic slurry injecting, and belongs to the technical field of drilling equipment. The backpressure valve comprises a valve body, a valve element and a support base and a valve base which are arranged in the valve body, wherein the support base is located under the valve base. The backpressure valve is characterized in that a piston is arranged in the valve body and arranged on the valve element in a sleeving mode, the valve base comprises an upper valve base body and a lower valve base body, the upper valve base body is located between the piston and the valve body, a slurry reflux tank hole is formed in the upper valve base body and communicated with an inner cavity of the valve body, and a slurry reflux hole is formed in the valve body and communicated with the slurry reflux tank hole. According to the backpressure valve, due to the fact that slurry in a well can be automatically injected into a drill pipe and does not need to be injected into the drill pipe by connecting a slurry injection device to the drill pipe whenever a part of the drill pipe is put down, the work amount is greatly decreased, the slurry injecting cost is effectively reduced, the condition that the slurry in the well is reversely sprayed into the drill pipe through an inner cavity of the valve body is effectively prevented, and then well drilling safety is guaranteed.

The invention discloses a movement control method and device, a storage medium and computer equipment, relates to the technical field of artificial intelligence, and mainly aims to obtain actual linear speed data and actual angular speed data by utilizing actual speed data of double-wheel movement and correct the double-wheel speed data, so that speed errors are reduced, and left-right swing in the moving process is reduced. The method comprises the following steps of receiving a movement control request, and generating a movement control path according to destination coordinates carried in the request; respectively comparing actual linear speed data and actual angular speed data obtained by processing the acquired double-wheel actual speed data with ideal linear speed data and ideal angular speed data obtained by analyzing the movement control path to obtain a comparison result; and correcting the double-wheel moving speed data according to the comparison result so as to control the double wheels to move to the destination along the moving control path. The method is suitable for mobile control.

A removable limiting device of a furniture drawer comprises a drawer body pushed and pulled on a furniture body through a sliding rail assembly to be closed and opened. The drawer body comprises a left side plate, a right side plate, a rear back plate, a bottom fixing device and a front face plate; the left end and the right end of the rear back plate are each provided with a removable limiting unit, and alternatively the rear end of the left side plate and the rear end of the right side plate are each provided with a removable limiting unit; each limiting unit comprises a rolling wheel clamping mechanism and an adjusting mechanism, each rolling wheel clamping mechanism is clamped on the corresponding adjusting mechanism in a removable mode, each rolling wheel clamping mechanism at least comprises a rolling wheel, and the rolling wheel clamping mechanisms at least are in coupling connection with the left sidewall and the right sidewall of the furniture body in a rolling limiting mode when the drawer body is pushed and pulled to be closed and opened. By means of the structural improvement, the removable limiting device has the advantages of being simple and reasonable in structure, reliable in performance, low in manufacturing cost, rapid to operate, convenient to maintain, high in universality, smooth and free of swing in the push-pull process and high in practicability.

The invention relates to the technical field of marine fishery breeding equipment, in particular to a universally-connected floating deepwater net cage which comprises a netting, a buoyancy device and an anchoring module, the netting is fixedly installed on the buoyancy device, the buoyancy device is fixedly connected with the anchoring module, the buoyancy device comprises four cross beams, eight cross beam columns and four floating blocks, and the four cross beams are fixedly connected with the anchoring module. The cross beams are connected end to end through cross beam columns and floating blocks to define a rectangle, the two ends of each cross beam are hinged to the upper ends of the cross beam columns respectively, and the floating blocks are rotationally connected with the two corresponding side faces of every two adjacent cross beam columns respectively; according to the universally-connected floating deepwater net cage, the effect that the floating blocks only transmit upward buoyancy to the cross beams of the net cage can be achieved, the cross beams of the net cage are not affected by moments of the floating blocks in other directions when the floating blocks swing along with waves, and the net cage is high in stability and safety.

The invention discloses a device and a method for measuring the adhesion strength of a gel type plugging material and a rock wall surface. The device comprises a rotating component and a measuring shell connected with the rotating component, a hollow rock core is arranged in the measuring shell, a T-shaped stop lever is arranged in the hollow rock core, and one end of the T-shaped stop lever penetrates out of one side of the measuring shell and is provided with a displacement measuring part for measuring the displacement of the T-shaped stop lever; and a sealing plate is arranged on the other side of the measuring shell. According to the invention, the hollow rock core is used as a container and is in direct contact with the to-be-tested gel type plugging material, the internal direct pressurization is carried out by injecting the oil liquid, so that the to-be-tested gel type plugging material obtains the pushing force, and when the to-be-tested gel type plugging material moves relative to the hollow core, the adhesion strength of the to-be-tested gel type plugging material and the rock wall surface can be calculated; the device and method are of great significance to clarify the plugging mechanism of gel plugging materials and solve the problem of well leakage.

The invention belongs to the technical field of circuit board delivery, and particularly relates to a PCB circuit board delivery device. The device comprises a box body, a box cover, box feet and a PCB circuit board placing unit, the box cover is hinged to the upper end of the box body, the box cover fits the box body, strip-shaped ribs are arranged on the box cover, and the strip-shaped ribs areused for preventing the direct rigid collision of the PCB circuit board and the box cover; the box feet are located at the four corners of the box body, Lello triangular wheels used for the moving ofthe box body are installed on the box feet, the up and down vibration amplitude of the PCB circuit board delivery device can be improved by the Lello triangular wheels to facilitate the rapid inflation of an inflation module; a PCB circuit board placing unit is fixed to the interior of the box body; the PCB circuit board placing unit comprises an installing body, an inflation module, an anti-collision module, a jacking module and a controller. By means of the device, the damage degree of PCB circuit boards in the transportation process can be reduced, and the transportation efficiency of the PCB circuit boards transported by a transportation vehicle can be improved.

The invention discloses a flexible damping automobile chassis structure which comprises a rear axle, a transverse swing arm and a hanging device. The center of the rear axle is connected with a longitudinal thrust pipe in the forward direction, the upper portion of the longitudinal thrust pipe is provided with a transverse swing arm, the transverse swing arm comprises a left pull rod, a right pullrod and a central rocker arm, the lower end of the central rocker arm is connected with the longitudinal thrust pipe through a pin shaft, and the upper end of the central rocker arm is connected to aframe; the two ends of the rear axle are respectively provided with a hub, a shock absorber and a helical spring; an upper end ring of each helical spring is connected with the frame through a connecting piece; a stabilizing rod is arranged between the connecting pieces, a hanging device is arranged on the stabilizing rod, and a mounting seat is arranged on the hanging device to enable the hanging device to be connected with the frame. The transverse swing arm device and the hanging device can effectively reduce vertical swing and transverse swing of an automobile chassis in driving, increaseflexibility and riding comfort of the automobile chassis, and improve stability and safety in the driving process of the automobile.

A stabilization structure used for a furniture drawer comprises a drawer body arranged on a furniture body through sliding rail assemblies in a push-pull opening and closing mode, the drawer body comprises side boards, a back board, a bottom board and a front panel, the sliding rail assemblies are arranged on the two sides of the drawer body in the left and right direction, and each sliding rail assembly is at least formed by assembling a fixed sliding rail and a movable sliding rail. The fixed rails are fixedly arranged on the side walls of the furniture body, the drawer body is detachably arranged on the movable sliding rails, the two ends of the back board are connected with the two side boards respectively, the bottom board is arranged between the two side boards, and stabilization devices are arranged on the outer sides of the two side boards or the left and right sides of the back board, and provided with rolling wheels. The rolling wheels are coupled with the side walls of the furniture body in a rolling and limiting mode at least when the drawer body is opened and closed in a push-pull mode so that the left and right swinging, relative to the two side walls of the furniture body, of the drawer body when the drawer body is opened and closed in the push-pull mode can be reduced. Through the improved structure, the stabilization structure has the advantages of being simple, reasonable, reliable in performance, low in manufacturing cost, convenient to operate and low in noise and achieving smoothness in the push-pull process without swinging.

A stabilizing structure of a furniture drawer comprises a drawer body formed in a furniture body and opened and closed through slide rail modules in a pushing and pulling mode, wherein the drawer body comprises side plates, a rear back plate, a base plate and a front side plate, the slide rail modules are arranged on two sides of the drawer body in a left-right mode, and each slide rail module is formed by assembling, at least, a fixed slide rail and a movable slide rail. The fixed slide rails are fixedly arranged on the side walls of the furniture body, the drawer body is detachably arranged on the movable slide rails, stabilizing devices are arranged on the left movable slide rail and the right movable slide rail and provided with rolling wheels, the rolling wheels are in coupled connection with the side walls of the furniture body in a rolling-limiting mode at least when the drawer body is opened and closed in a pushing and pulling mode, so that left-right swing relative to the two side walls of the furniture body is reduced when the drawer body is opened and closed in the pushing and pulling mode. By means of structural improvement, the stabilizing structure has the advantages of being simple and reasonable in structure, reliable in performance, low in manufacturing cost, convenient to operate, smooth to push and pull, swing-free, low in noise and the like and is high in practicability.

A stabilization structure of a furniture drawer comprises a drawer body which is pushed and pulled to be closed and opened on a furniture body through slide rail assemblies. The drawer body comprises side plates, a back plate, a bottom plate and a front face plate. The slide rail assemblies are horizontally arranged on the two sides of the drawer body. Each slide rail assembly is at least formed by assembling a fixed slide rail and a movable slide rail, wherein the fixed slide rail is fixedly arranged on the side wall of the furniture body, and the drawer body is detachably arranged on the movable slide rail. A cavity is formed in each side plate. A rear connection device and a front connection device which are used for connecting the back plate and the front face plate are arranged on each cavity. Stabilization devices are arranged on the left rear connection device and the right rear connection device and provided with wheels. The wheels and the side walls of the furniture body are coupled in a rolling and limited mode at least when the drawer body is pushed and pulled to be closed and opened, and therefore the horizontal swinging, relative to the two side walls of the furniture body, generated when the drawer body is pushed and pulled to be closed and opened is reduced, and practicability is high.

The invention provides a longitudinal two-way flow guide type bullet train head which comprises a fairing and a flow guide plate, and is characterized in that the fairing is in a duckbilled streamline shape which has the characteristics that the front end is transversely flat, the longitudinal diameter of the front end is gradually increased from front to rear, an upper arc is large, a lower arc is small and two sides are flat; the flow guide plate is a longitudinal vertical flat plate which blocks the two sides of the fairing and extends outwards. Comparedwith the prior art, air in front of a bullet train during running of the bullet train is diverted upwards and downwards by the fairing and the flow guide plate, so that transverse flow and eddy flow caused by compressed air are limited at the top of the bullet train in open space and the bottom of the bullet train in fixed space, less disturbed air is generated on the two sides of the bullet train, and the transverse width of air stream is relatively small; the air stream diverted to the upper part of the bullet train is relatively easy to disperse due to the open space; the air stream diverted to the bottom of the bullet train difficultly forms the transverse flow due to the ground effect, so that the bullet train is slightly jolted; the relatively high-speed air stream is reduced on the two sides of the bullet train, so that the influence of nearby dynamic and static large-sized objects is reduced, the left-right swing is slight, the bullet train is relatively stable, the attractionto nearly dynamic and static small-sized objects is reduced, and the bullet train is relatively safe.

The invention discloses a furniture drawer limiting device. The furniture drawer limiting device comprises a drawer main body, wherein the drawer main body is arranged on a furniture main body through a sliding rail component in a push-pull and open-close way; the sliding rail component is at least formed by fixed sliding rails and movable sliding rails; the fixed sliding rails are fixedly arranged on the left side wall and the right side wall of the furniture main body; the drawer main body is detachably arranged on the movable sliding rails; the drawer main body comprises a left side panel, a right side panel, a rear panel, a bottom panel and a front panel; the left side panel and the right side panel or two sides of the rear panel are respectively provided with a limiting device; the limiting devices are roller type limiting devices and are respectively arranged on the left side panel and the right side panel or the two sides of the rear panel; each limiting device comprises a roller and an adjusting component; the left side wall and the right side wall of the furniture main body are basically and parallelly arranged; the rollers are rotationally arranged on the adjusting components and are at least coupled to the left side wall and the right side wall of the furniture main body in a rolling and limiting way when the drawer main body is opened or closed in a push-pull way. The furniture drawer limiting device disclosed by the invention has the characteristics that the structure is simple and reasonable, the performance is reliable, the manufacturing cost is low, the operation is convenient, and a push-pull process is smooth, swinging-free and low-noise; the practicability is high.

The invention discloses a Ferris wheel. A balance box is arranged on each cage; a balance device is arranged in the balance box; when the cage is deflected to the right, a right pawl tip of a right ratchet pawl can leave a clockwise rotating ratchet wheel under the traction of a balance gravity hammer, so that the cage can rotate clockwise to reset under the action of gravity; when the cage is reset to the position perpendicular to the ground, the traction force of the balance gravity hammer to the right ratchet claw disappears, and the right ratchet claw is reset to be propped against the clockwise rotating ratchet wheel under the action of a right reset spring, so that the cage can continue swinging leftwards under the action of inertia; in a similar way, when the cage is deflected to the left, a left ratchet pawl can leave an anticlockwise rotating ratchet wheel under the traction of the balance gravity hammer, so that the cage can rotate anticlockwise to reset under the action of gravity; when the cage is reset to the position perpendicular to the ground, the traction force of the balance gravity hammer to the left ratchet claw disappears, and the left ratchet claw is reset to pressed against the anticlockwise rotating ratchet wheel under the action of the right reset spring, so that the cage can continue swinging rightwards under the action of the inertia; therefore, the left-right swinging of the cage can be effectively reduced, and the cage can be kept in a balanced state after being reset.

An intelligent parking garage. The intelligent parking garage is provided with a closed ring-shaped roulette. The roulette is provided with a plurality of outwardly protruding roulette brackets. A parking frame is set on each roulette bracket. When the parking frame is facing right Off, the right claw tip of the right pawl will leave the clockwise ratchet under the traction of the balance gravity hammer, so that the parking frame will rotate and reset under the action of gravity. When the parking frame is reset to be perpendicular to the ground, the balance gravity hammer will The traction force disappears, and the right pawl resets against the clockwise ratchet under the action of the right return spring, so that the parking frame cannot continue to swing to the left under the action of inertia. Similarly, when the parking frame is tilted to the left, the left pawl will Under the traction of the balance weight hammer, leave the reverse ratchet, so that the parking frame is reversed and reset under the action of gravity. When the parking frame is reset to be perpendicular to the ground, the parking frame cannot continue to swing to the right under the action of inertia, so that it can Effectively reduce the left and right swing of the parking rack, so that the parking rack can maintain a balanced state after reset.

The invention discloses a method for improving the stability of a material pile in a medicinal glass kiln. The method comprises the steps that S1, rapid correction of installation and debugging of a charging machine is achieved through a charging machine rapid correction device; and S2, through the feeding mechanism, angle adjustment is conducted on the feeding machine in the normal production process according to the condition of the material pile in the furnace, and the state of the material pile in the furnace is optimized. According to the method for improving the stability of the in-furnace material pile in the medicinal glass kiln, through implementation of a charging machine rapid correction device, an adjustable track, a charging opening cleaning method and other methods, the installation precision of the charging machine is improved, the influence of equipment deviation on the material pile is avoided, the maintenance and calibration efficiency of the charging machine is improved, and the practicability is high. The consistency of mounting and positioning of the charging machine is ensured, the phenomena of frequent left-right swinging of a material pile in the kiln, abnormal accumulation of raw materials and the like are effectively reduced, the stability of temperature change, liquid level fluctuation and process control parameters of the kiln is ensured, the homogenization effect of molten glass in the kiln is kept, and the stability of the melting quality of the molten glass in the kiln is improved.

The invention discloses a movement control method, device, storage medium and computer equipment, and relates to the technical field of artificial intelligence. The data is corrected to reduce the speed error and reduce the left and right swings during the movement. The method includes: receiving a movement control request, generating a movement control path according to the destination coordinates carried in the request; using the actual linear velocity data and the actual angular velocity data obtained by processing the acquired actual velocity data of the two wheels, respectively, and the analysis institute Compare the ideal linear velocity data and ideal angular velocity data obtained by the above-mentioned movement control path to obtain the comparison result; correct the two-wheel movement speed data according to the comparison result, so as to control the two-wheel to move to the destination along the movement control path . The invention is suitable for mobile control.

The invention discloses a wire withdrawing machine, and belongs to the technical field of mechanical equipment. The wire withdrawing machine comprises a transmission device and an unwinding device arranged on a main frame; the transmission device is connected with the unwinding device through a rotating shaft; the unwinding device comprises a guide roller set; the guide roller set comprises a first guide roller and a second guide roller; U type blocks are arranged on the two sides of the second guide roller, and are fixed on the main frame; springs and square blocks are arranged in grooves ofthe U type blocks; one ends of the springs are connected with the U type blocks, and the other ends are connected with square blocks; and the square blocks are connected with the end parts of a centershaft of the second guide roller. The wire withdrawing machine can control the fiber swing amplitude, solves the problem of more twists in a traditional wire withdrawing machine, and improves the product quality.

The invention discloses a feeding mechanism achieving continuous leather material guide and preventing a material from being stuck. The feeding mechanism comprises a feeding guide mechanism and pressplate guide mechanisms. The press plate guide mechanisms are used for pressing the edges of the leather material to sharp teeth of conveying chains with the sharp teeth, and therefore the leather material can be dragged by the conveying chains with the sharp teeth to move after the sharp teeth of the conveying chains with the sharp teeth pierce the edges of the leather material. Each press plate guide mechanism comprises a lower guide plate and an upper guide plate. The lower guide plates and the upper guide plates are installed on a lifting driving mechanism, and therefore the lower guide plates and the upper guide plates can be driven by the lifting driving mechanism to ascend and descend, and the piercing depths of the sharp teeth of the conveying chains with the sharp teeth are adjusted. According to the feeding mechanism, the upper guide plates and the lower guide plates in the press plate guide mechanisms ascend and descend to adjust the depths of the sharp teeth, piercing the leather material, of the conveying chains with the sharp teeth, and therefore the pull force of the conveying chains with the sharp teeth and on the two sides to the leather material is adjusted, and the frequency of the phenomenon that the leather material swings leftwards and rightwards is reduced; and the press plate guide mechanisms are combined with a series of limiting devices on the feeding guide mechanism, the phenomenon that the leather material swings leftwards and rightwards and fluctuates is avoided, and therefore the material is prevented from being stuck.

The invention discloses a grouting method for a drilling rod and belongs to the technical field of drilling. The grouting method is characterized by comprising the following steps: a, connecting the upper end of a back pressure valve with the drilling rod, and connecting the lower end of the back pressure valve with a drilling tool; b, tripping the drilling tool and the back pressure valve in a well, enabling slurry in the well to reflux into the drilling rod from bottom to top by a self-grouting channel of the back pressure valve, and finishing automatic grouting of the drilling rod; c, positively circulating the slurry, downwards moving a piston in the back pressure valve to block a slurry reflux groove hole and closing the self-grouting channel. According to the grouting method disclosed by the invention, reverse spraying of the slurry in the well can be prevented and the slurry in the well is enabled to automatically reflux into the drilling rod, and the operation that the grouting device is connected and pours the slurry into the drilling rod once a part of the drilling rod is laid down is not needed, so that the workload is greatly reduced, and the grouting cost is effectively reduced.

The invention discloses a truss string structure internally provided with inclined guy ropes. The truss string structure comprises a top chord, a web member, knot sleeves, a lower cable and the inclined guy ropes, wherein the top chord is connected with the web member in a penetrating manner by way of welding, the lower end of the web member is connected with the knob sleeves, the lower cable penetrates through both rear ends of each knob sleeve and is fixed on support knobs at both ends respectively, the inclined guy ropes are symmetrically arranged, the lower ends of the inclined guy ropes are fixed on the support knobs and the upper ends of the inclined guy ropes are connected with the fixed knot of an upper cable; the fixed knot of the upper cable can be any intersection point between the top chord and the web member in a span scope of the truss string structure which is 1 / 5 to 1 / 3 far from adjacent support knobs. A pre-tress system which can provide bidirectional resistance is formed by the lower cable and the inclined guy ropes and the system can be suitable for wind suction loads. The truss string structure disclosed by the invention further has the advantages of small use level of steel products, simple structure, low preparation cost, good performance, easy construction and the like.