242results about How to "Simple force" patented technology

The invention provides a tunnel double upper sidewall heading construction method. When a tunnel is excavated, the cross section of the tunnel is divided into a first heading, a second heading and an upper core soil; a No.1 lower step and a No.2 lower step are excavated in different time; and a boundary of the first heading and the No.1 lower step, and a boundary of the second heading and the No.2 lower step are springing lines. The method has the advantages that: the cross section of the tunnel is divided into an upper part and a lower part by taking the springing line as a boundary, wherein the upper part is constructed by an improved double sidewall heading method; the tunnel with a large section is divided into a left heading and a right heading to be constructed one after another immediately, and the core soil is excavated by sloping, so that the excavation section span is reduced and the supporting effect of the core soil is achieved; and the lower part is divided into a left part and a right part to be constructed one after another; an invert arch and a filler course are constructed timely; and the secondary linings of an arch wall and an arch crown are constructed finally so as to enter a common working condition together with surrounding rock and primary supports.

In a control device for a hydraulic actuator, one end of an oil passage that is provided through a connecting rod, a crankshaft and a crankcase supporting the crankshaft is connected to a hydraulic chamber of a hydraulic actuator provided in a piston connected to the crankshaft via the connecting rod with the other end of the oil passage being connected to an oil reservoir and a hydraulic pressure source via a main switching valve. An auxiliary switching valve is provided in the connecting rod. The auxiliary switching valve causes a downstream side of the oil passage that leads to the hydraulic chamber to open into the crankcase when the main switching valve allows the oil passage to communicate with the oil reservoir.

The invention provides flexible piezoelectric fiber thin film with high output and a preparation method thereof, and belongs to the technical field of electron composite materials and micro-nano function materials. An electrostatic spinning technology is adopted, and ceramic fibers, conductive fibers and other one-dimensional inorganic materials are taken as filler to prepare polymer-based composite film of a sleeve structure and in directional alignment. The filler core of the fiber composite thin film of the sleeve structure is barium titanate, barium strontium titanate, lead zirconate titanate and other piezoelectric ceramic fibers or silver nanofibers, multiwalled carbon nanotubes and other one-dimensional conductive fillers, and inorganic fillers are wrapped with polymer matrix fibers. The polymer matrix can be polyvinylidene fluoride, polyvinylidene fluoride-trifluoroethylene, polyvinylidene fluoride-trifluoroethylene-hexafluoropropylene and other materials. By adjusting contentand types of the filler, piezoelectric output voltage can reach 20 V, the output current can reach 250 nA. The cokmposite material has the advantages of good flexibility, high piezoelectric output, high sensitivity and light weight, and can be taken as a power supply of wearable equipment and a flexible sensor to detect human activities.

Disclosed are a self-travelling diamond-shaped pin-connected truss-type form traveler structure and a form traveler travelling and constructing method. A form traveler is mainly composed of a main truss system, a horizontal connection system, an internal formwork system, an external formwork system, a bottom formwork platform system, a hanging system, an anchoring system and a travelling system. The main truss system is composed of two main trusses and horizontal bracings, and each single main truss is composed of a lower chord, an upper chord, a diagonal rod and a vertical rod which are connected into a whole via single-hole bolt pins through joint boxes. The two main trusses are connected by the spacing-adjustable horizontal bracings. A rear anchoring system is connected to the rear of the lower chords of the main trusses. The travelling system comprises a section rail located under the main trusses, a left-handed wheel, rollers, a travelling pushing jack and the like. The self-travelling diamond-shaped pin-connected truss-type form traveler structure is quick to install, the spacing between the main trusses and the positions of hanging rods can be adjusted according to the section forms of different box girders on the basis that load bearing is satisfied, the optimal stress state is formed, universality is high, turnover rate of the form traveler is increased greatly, project cost is saved, and economical benefit is obvious.

The invention discloses a construction method and equipment for integrally mounting an offshore wind generating set. The construction method comprises three phases of loading, towing and mounting the fan. The equipment for integrally mounting the offshore wind generating set and consists of a barge and a fixed device on the barge, wherein the main body of the fixed device is a truss; a balance clamp is arranged at the top of the truss; a hydraulic cylinder hanging system is arranged in the middle of the truss; a U-shaped groove is arranged at the front end of the barge; a girder is arranged in the middle of the U-shaped groove; two ends of the girder are fixed on the barge; and an open hole with the size being the same as the diameter of a tower column at the bottom of the fan is arranged in the middle of the girder. In the construction method for integrally mounting the offshore wind generating set, a large-sized special floating crane and special equipment can be omitted; the construction method has simple process and low cost and can ensure the mounting requirement and regulation of the offshore wind generating set; and the equipment for integrally mounting the offshore wind generating set has simple structure and is convenient for operation.

A MacPherson air suspension comprises a cross stabilizer bar, two strut assemblies arranged on the left side and the right side of the cross stabilizer bar, a left steering knuckle, a right steering knuckle, a left lower suspension arm, a right lower suspension arm and a left-right stabilizer bar connection push rod connecting the cross stabilizer bar and the strut assemblies. Each strut assembly comprises a front shock absorber and an air spring assembly integrated on the front shock absorber, and the front shock absorber is fastened with the lower support of the front shock absorber through bolts. The upper ends of the left steering knuckle and right steering knuckle are respectively connected with the upper portion of the lower support of the front shock absorber through ball pin fittings, the lower portions of the left steering knuckle and right steering knuckle are connected with shaft sleeve connection plates of the steering knuckles through shaft pins and are connected with the lower portion of the lower support of the front shock absorber through the shaft sleeve connection plates, and the left steering knuckle and right steering knuckle respectively form an integrated frame structure with the lower support of the front shock absorber. The central connection line of the ball joints of the ball pin fittings and the shaft sleeves of the shaft sleeve connection plates of the steering knuckles is a main pin axis a. The MacPherson air suspension can meet the requirements of an automobile under various loading conditions, and ideal comfortable ride comfort can be obtained.

The invention relates to a centering adjustment method for wheel sets of a locomotive test stand and a traction force meter stand thereof. In order to enable all locomotive wheels of a locomotive to completely fall into corresponding rail wheels in foundation pits of the test stand, during test, the centers of the locomotive wheels are required to be kept perpendicularly centered with the centers of the rail wheels, and the locomotive is required to run in location mode in the horizontal direction, and thus the tested locomotive can be ensured to run stably and safely on the test stand. The centering adjustment method of the test stand of the locomotive comprises the following steps of 1 selecting the central lines of the foundation pits of the rail wheels to serve as location reference lines; 2 adopting a double-traction force meter stand to serve as the test stand; 3 performing secondary centering adjustment on the locomotive wheel sets and the rail wheel sets; and 4 providing the same pre-tightening force for a car coupler of the tested locomotive, and offsetting or reducing the horizontal displacement of the locomotive caused by deformation of the car coupler buffer. A speed reducer shaft of the traction force meter stand is parallel with a crew, a nut is screwed on the screw, a chain wheel on the speed reducer shaft is connected with a chain wheel on the nut through a chain, and one end of the screw is connected with a traction force measurement device.

An operated quantity of a brake pedal is detected based on a signal from a stroke sensor. A starting criterion to start brake assisting is determined with respect to an operational speed of the brake pedal in response to the operated quantity of the brake pedal. An operated-quantity change is calculated by differentiating the operated quantity of the brake pedal. It is determined whether the operated-quantity change exceeds the starting criterion. If the operated-quantity change exceeds the starting criterion, brake assisting is started by driving a pump to increase wheel cylinder pressure.

The invention relates to a direct drawing device and a direct drawing method for detecting compressive strength of concrete, and the direct drawing device comprises a standard part which is bonded with a detected concrete member and a drawing instrument connected with the standard part. The standard part is a cylindrical steel direct drawing standard part, a connecting head is arranged at the center of the cylinder bottom on the outer side of a cylinder, and the connecting head is connected with the drawing instrument. A drawing system consists of a tension sensor, the hydraulic drawing instrument and a load meter. When in use, a bonding agent is used for bonding the cylinder bottom of the cylinder of the steel direct drawing standard part and the inner wall of the cylinder on the detected concrete, the steel standard part is connected with the connecting head, the drawing system is started, and the tension value when the concrete is damaged is recorded, thereby calculating the strength of the concrete. The failure surface of the detected concrete caused by the device is very small and the detection precision is high.

The invention relates to a multifunctional automatic guide transport vehicle. The multifunctional automatic guide transport vehicle comprises a vehicle body, a vehicle driving system, a multi-point jacking device, two supporting plates, a bus system and a safety guide device, wherein the vehicle body is provided with a chassis, and the chassis is provided with two fork foot base frames which are arranged in parallel; the vehicle driving system is provided with two driving wheels, a plurality of universal wheels and two first driving devices used for correspondingly driving the two driving wheels to rotate; the two driving wheels are arranged on the lower portions of the two sides of the middle of the chassis in the front-back direction correspondingly; the multi-point jacking device is provided with a plurality of lifting devices and second driving devices used for correspondingly driving the plurality of lifting devices to perform lifting motion; each supporting plate is provided withat least two lifting devices; the bus system synchronously controls the plurality of second driving devices; and the safety guide device is provided with a solid state laser radar, a laser obstacle avoidance sensor, a contact type sensor, a mechanical anti-collision strip arranged in the vehicle body, a sound-light alarm and an emergency stop button. According to the multifunctional automatic guide transport vehicle, the height of a cargo fork can be reduced to the largest extent, and turning can be realized at the minimum radius.

A gap-adjustable guide track unit for the pre-stressed machine frame of large hydraulic press used for forging is composed of pull screw bolts, nuts, top and bottom transverse beams, square vertical posts between top and bottom transverse beams, movable transverse beam, regulating spacers, wedged guide plate, wedged pads and their fixing screw bolts, and slide plates for said square vertical posts.

The invention discloses a method for hoisting a steel dome of a nuclear power plant in a balance-keeping manner. The method is realized by cooperation of a balance hosting device of the steel dome of the nuclear power plant and hoisting machinery and comprises the steps of assembling in place, trial hoisting, hoisting and the like. A plurality of adjustments are carried out in each step to stress related components in a balance-keeping manner, so that the stability of the hoisting process is ensured. The method can ensure the balance of multi-point hoisting stress and accuracy of levelness of a lower opening of the dome, is applicable to hoisting and mounting of the dome of a containment of the nuclear power plant, is used for ensuring the balance of hoisting stress and accuracy of levelness of the lower opening of the dome, and is also applicable to the hoisting process of other spherical segment and spherical coronary objects.

The invention provides a prefabricated steel joint concrete slab-column structure and a hoisting method thereof. The prefabricated steel joint concrete slab-column structure comprises a concrete slab, concrete piles, energy dissipation support units and a plurality of deformation energy dissipation devices, wherein the bottom end of any one of the concrete piles is fixed on the ground foundation or the top end of the next concrete pile, the bottom end of any one of the concrete piles is fixed on the ground foundation or the concrete slab and arranged between every two adjacent concrete piles, and deformation joints are formed between the concrete slab at the top end and any one adjacent concrete pile; the deformation energy dissipation devices are arranged in the deformation joints and at two vertex angles of any one of the energy dissipation support unit. The steelwork joints are arranged at the joint of the concrete piles and the ground foundation or the concrete slab. Prefabrication efficiency is improved, anti-seismic function is realized, construction procedures are simplified, and construction cost is reduced.

The invention relates to a combined form of composite cross arms, which comprises a draw bar hoop and a cross arm hoop, wherein the draw bar hoop and the cross arm hoop are sleeved on a bar body in an up-and-down sequence, the upper and lower surfaces of a hanging point are respectively provided with a draw bar connecting hole and a conductor grip hanging hole, the left and right ends of the hanging point are respectively provided with a hanging point connecting hole, the two ends of a draw bar are respectively connected with the hanging point and the draw bar hoop, the two ends of a cross arm are provided with a link fitting, one end of the cross arm is hinged with the cross arm hoop, the other end of the cross arm is connected with the hanging point through the hanging point connecting hole, and two cross arms are hinged through a hinging hole. According to the invention, a three-hanging-shaft connecting structure is fixedly formed among two cross arms and a cross arm hoop, and the stability of the three-hanging-shaft connecting structure is strengthened by using a draw bar, so that the problem that an insulating composite cross arm is relatively heavy in tooling fittings and inconvenient to install is solved, meanwhile, when the requirements on compression strength, tensile strength and stability are satisfied, the cross sectional area of the composite cross arm is reduced, the material consumption is reduced, and the project cost is greatly reduced.

The invention provides a parametric modeling method of a folded plate reticulated shell based on grasshopper, which is used for solving the problems of modeling difficulty, low modeling efficiency andlow repetition utilization rate of the existing space folded plate reticulated shell with complex modeling. The invention comprises the following steps: expressing the geometrical parameters of a lattice shell model to be established by corresponding input plug-ins; generating a flap surface or quasi-spherical surface by using the application plug-ins according to geometrical relation; selectingone of the planes and using an isoparametric method or subdivision method to mesh a folded surface to generate local meshes; gridding all the planes by the circumferential array plug-in, and generating the single-layer folded latticed shell by connecting the bars with the plug-in. The invention has the advantages of simple design method, new model can be established by changing the parameter valuein the model, the modeling efficiency can be improved, the force analysis and the structural design optimization of the complex space reticulated shell structure under different types and different parameters are improved greatly and conveniently, and the use of the complex space reticulated shell structure is promoted.

The invention discloses an improved structure of a compact type wind power generating set. The improved structure comprises at least one rotor blade, a hub, a gear case, a generator, a transmission system shell, a yawing assembly and a cabin base. The rotor blades are connected with the hub through a variable pitch bearing. The hub is connected to an inner ring of a rotor bearing of the gear case through a wind wheel lock disc, a front end cover of the gear case and a bolt. A front end flange and the rotor bearing of the gear case and the transmission system shell are arranged between the hub and the cabin base, designed into load transmission components and connected through flange bolts. The gear case and the generator are arranged in the transmission system shell. The transmission system shell is connected to the cabin base through bolts. The cabin base is connected with a tower through yawing bearings of the yawing assembly, and he tower is matched with the wind power generating set. The improved structure is very compact, light and low in cost.

In a force sensor chip, a base member, to which an external force is applied, includes: an operating part provided in a central portion of the base member and having an external-force acting area section; a supporting part provided, in an outer peripheral portion of the base member, for supporting the operating part; an intermediate part provided between the operating part and the supporting part; a first connecting arm section connecting the operating part and the intermediate section; a second connecting arm section connecting the intermediate part and the supporting part; and at least one strain resistance element provided on each of respective deformation-generating portions of the first and the second connecting arm sections.

The invention discloses an inclined wedge regulating and spacing mechanism for an air conditioner fin die, which comprises a first inclined wedge block and a second inclined wedge block, wherein the first inclined wedge block and the second inclined wedge block are mutually cooperated; the second inclined wedge block is connected with a regulation screw; the regulation screw is installed on a regulation screw fixing block; one side of the regulation screw fixing block is provided with a display device; a banking pin fixing block is arranged above the regulation screw fixing block; the inside of the banking pin fixing block is provided with a banking pin; the banking pin is sheathed with an elastic component; and the upper end part of the banking pin is provided with a handle. According to the inclined wedge regulating and spacing mechanism for the air conditioner fin die, the banking pin is cooperated with a spring to reliably space the regulation screw, and the regulation screw is unlikely to loosen. The height of the inclined wedge can be vertically regulated by rotating the regulation screw while the handle is pulled up, thereby being simple to install and convenient to operate. Meanwhile, the regulation screw is unlikely to be stressed in the working process, and the integral structure is safe and has a high reliability.