44results about How to "Solve the deflection problem" patented technology

A precision rod type convergence gauge comprises anchor heads which are respectively fixed at two ends of a measured distance, a universal hook and a tubular connecting rod; the precision rod type convergence gauge also comprises a micrometer caliper, wherein one end of the micrometer caliper is connected with an extracting-pulling type distance-measuring gauge and the other end is connected with a pull rod benchmark device which consists of a telescopic rod fixed with the micrometer caliper into a whole, a force-measuring spring guide sleeve matched with the telescopic rod and a limit spring. The connecting part of the force-measuring spring guide sleeve and the micrometer caliper is provided with a benchmark window marked with a benchmark line; the ends of the pull rod benchmark device and the extracting-pulling type distance-measuring gauge can be respectively connected with a plurality of sections of tubular connecting rods by threads; and an alignment line which can be aligned to the benchmark line of the benchmark window is arranged on the telescopic rod. The precision rod type convergence gauge is applicable to the stability monitoring of military caves, railway tunnels, bridges, underground hydraulic buildings and mine tunnel chambers, and the deformation observation of earth structures. The precision rod type convergence gauge has the advantages of the structure convenient for observation, high precision, combination of a plurality of sections of measurement rod and strong adaptability.

The invention discloses a sample rod for a transmission electron microscope added with a magnetic field. The sample rod comprises a head frame, a carrier, a first magnetic coil and a second magnetic coil, wherein the head frame is provided with a first end part and a second end part along the length extending direction of the sample rod; the carrier is used for carrying a sample and is provided with a channel; an incident electron beam can pass through the channel; the carrier is arranged in the head frame and is close to the first end part of the head frame; the first magnetic coil is arranged in the head frame and is close to the second end part of the head frame; when the current is generated, a first magnetic field is generated by the first magnetic coil; the first magnetic field has a magnetizing effect on the sample; the second magnetic coil is arranged in the head frame and is close to the second end part of the head frame; the second magnetic coil is located under the first magnetic coil; when the current is generated, a second magnetic field is generated by the second magnetic coil; and under the action of the second magnetic field, the electron beam which deflects under the action of the first magnetic field deflects toward an incident direction. The sample rod provided by the invention can be used for researching the change in a magnetic domain of a magnetic material under the action of an externally added magnetic field.

The invention provides a machining method for parts with curved surfaces. The machining equipment is provided with a robot, a posture calibration block, a three-dimensional scanning device and a host computer, and the machining method comprises the following steps: scanning a part I with a curved surface I and the posture calibration block with the three-dimensional scanning device; sending the obtain image data I to the host computer, so as to conduct reverse modeling and data analysis on the image data I, and further obtain a first relative deflection value; machining the part I; replacing the part I with another part II with a curved surface II after the part I is machined; scanning the part II and the posture calibration block with the three-dimensional scanning device; sending the obtain image data II to the host computer, so as to conduct reverse modeling and data analysis on the image data II, and further obtain a second relative deflection value; calculating the deflection error between the second relative deflection value and the first relative deflection value; carrying out compensation on the robot with the host computer according to the deflection error; machining the part II; repeating the above steps till all the parts are machined. The invention further provides machining equipment for the parts with the curved surfaces.

The invention discloses a novel transmission system of an electric long sliding rail, The sliding rail assembly comprises a left rail assembly and a right rail assembly, the left rail assembly comprises a slidably connected upper left rail and a lower left rail, the right rail assembly comprises a slidably connected upper right rail and a lower right rail, and the system comprises a slidably connected bridge with left and right sides fixed above the upper left rail and the upper right rail, respectively; A rack horizontally fixed in the inner grooves of the left lower rail and the right lowerrail; A driving motor connected to a middle lower surface of the slide rail connecting bridge; A transmission rod with a middle part connected with an output end of the drive motor; The transmission module comprises a housing, a driving gear and an output gear, wherein the output gear comprises an integrally formed meshing gear and a transmission gear. The transmission module is fixed inside the left upper rail and the right upper rail, respectively. The invention avoids the deflection problem of the filament rod in the long-stroke transmission, and effectively avoids the generation of abnormal sound.

The invention provides a construction method of a middle-and-small-scale steel truss tied-arch bridge. The construction method comprises the steps that steel beams on the upper portion of a main bridge are installed from supporting points on the two side edges to the midspan; all components of a main structure of side spans are installed firstly, then steel truss arches of a middle span are installed, lifting levers are installed after midspans of the steel truss arches are combined, and finally middle span tie bars and a bridge deck system of the middle span are installed through a crane; hoisting towers are symmetrically installed in the positions, corresponding to the two ends of the middle span, of the ground, and the steel truss arches of the middle span are hoisted through the cooperative construction of the two hoisting towers; hoisting arms of the two hoisting towers can cover the whole construction area specific to the middle-and-small-scale steel truss tied-arch bridge, and construction is conducted on the two sides at the same time, so that the hoisting speed is increased, and application of other hoisting equipment is reduced; during the installation of steel truss arch cantilevers of the middle span, the capsizing moment at the cantilever ends are balanced by adopting a ballast counterweight mode on the side spans, and the effect that the anti-capsizing stabilizing coefficient is larger than 1.3 is guaranteed; and when a combined section of the middle span is installed, jacks are arranged through pier tops of side piers, the combination error is adjusted in the mode that caving is conducted through the side piers and main piers are fixed, and the effect that the combined section can be installed smoothly is guaranteed.

The invention discloses a double-pulley hanging method for synchronously unfolding an ultrahigh-voltage multi-bundled conductor. In the double-pulley hanging method, a connecting plate is used, wherein hanging holes with the same number of bundles of a conductor are formed on the outer periphery of the upper edge of the connecting plate; the hanging holes are used as hanging points; a hanging hole on the left side of the connecting plate and a hanging hole on the right side of the connecting plate are used as the hanging points for hanging two pulleys; the two hanging points have the same height; the hanging points are connected with the pulleys through parallel hanging plates; and the hanging points are connected and fixed with the parallel hanging plates through bolts. By the double-pulley hanging method, when a linear tower has an angle and the linear tower is adjacent to a tension tower, the pulleys deflect towards the inner corner sides and the two parallel hanging plates rightly clamp the connecting plate, so as not to affect flexible deflection of the pulleys, and perfectly solve the problems of circuit steering and pulley deflection.

The invention provides a break-of-gauge beam for large and long foundation pits and a construction method thereof. The break-of-gauge beam comprises a matrix and steel sleepers for mounting gantry crane rails, wherein, the steel sleepers are fixed at the upper part of the matrix; and the matrix is formed by connecting a plurality of Bailey pieces via hinge pins. The construction method comprises the following steps: a. forming the matrix of the break-of-gauge beam by connecting a plurality of Bailey pieces via the hinge pins, and fixing two ends of the matrix into a concrete foundation provided with a U-shaped groove; b. mounting more than one supporting block below the middle part of the matrix, arranging a tray at the top of the supporting block and mounting steel plates between the tray and the matrix; and c. laying the steel sleeper for mounting the gantry crane rails at the upper part of the matrix to complete the construction of the break-of-gauge beam. The break-of-gauge beam for large and long foundation pits in the invention has the advantages of simple and compact structure, low cost, convenient construction, widely applicable range and high reliability.

The invention provides a surging molten iron slag-off method. Two air injection guns are perpendicularly inserted into molten iron from the top of a molten iron tank. The interval between the two guns is 1/2 of the radius of a tank opening, the insertion positions are located at the points 1/2 of the radius of the tank opening, and the insertion depth ranges from 0.5 m to 2.5 m; the air supply intensity is controlled to be larger than or equal to 2 NL/(min t) and the pressure is larger than 0.7 MPa; the air supply intensity of the air injection gun A is controlled to be 2 NL/(min t), the air supply intensity of the air injection gun B is gradually increased till the molten iron boiling exposed face makes contact with the wall of the molten iron tank, the air supply intensity of the air injection gun A is adjusted to be the same as that of the air injection gun B till the area of the molten iron boiling exposed face is larger than 1/2 of the tank opening of the molten iron tank, and therefore slag-off operation is started; after slag-off operation is finished, the air injection guns are pulled out of the molten iron and inject air continuously for over 30 s; and hoist cranes are used for lifting the air injection guns, so that locating pins are away from locating holes from 190 mm to 210 mm, the hoist cranes are transversely moved till the interval between the two guns reaches the length of the radius of the tank opening and then the hoist cranes fall, and the locating pins fall into new locating holes. By the adoption of the surging molten iron slag-off method, slag-off time can be shortened and iron loss and the converter resulfurization amount generated in the desulfuration slag-off process can be effectively reduced.

The invention discloses an outlet energy dissipation arrangement structure for centralized arrangement of different water release structures on the shore of a hydroelectric project. The included anglebetween the axis of a flood discharge tunnel and the axis of a spillway is small, the outlet portions of the flood discharge tunnel and the spillway share one stilling pool for energy dissipation, the stilling pool is arranged in an asymmetric horn shape on a plane, the bottom of the stilling pool is composed of a slope transition section and a horizontal section, and the auxiliary energy dissipation facility comprises a diversion pier, a submerged middle partition wall, a waveform reverse arc small flip bucket and an apron. The diversion pier is positioned on the slope transition section ofthe stilling pool, and the initial end of the diversion pier is positioned in the middle of the flood discharge tunnel outlet and the spillway outlet and is a widened equal-top-elevation isolation wall, and the submerged middle partition wall is located at the downstream of the diversion pier and is a variable-top-elevation partition wall with equal width and gradually increased height, and the stilling pool is divided into a left part and a right part by the diversion pier and the submerged middle partition wall. The waveform reverse arc small flip bucket is located at the slope transition section of the stilling pool. According to the outlet energy dissipation arrangement structure, the problems that when a same asymmetric energy dissipation pool is adopted for centralized energy dissipation at different flood discharge building outlets, rotation and energy dissipation of high-speed asymmetric water flow are not sufficient are solved, and engineering investment is saved.

The invention discloses a method for calculating the flexural rigidity of an externally-wrapped corrugated side plate-concrete composite beam. By means of the method, the flexural rigidity of the externally-wrapped corrugated side plate-concrete composite beam can be rapidly calculated. The method comprises the steps that the thickness and width of a steel top plate and a steel bottom plate of anexternally-wrapped corrugated side plate-concrete composite beam, the wave height of a corrugated side plate, the height and width of a beam section, the height and width of a concrete floor and the elasticity modulus of concrete and steel are obtained; according to elastic analysis, the average value of the widths of the wave crests and the widths of the wave troughs of the corrugated steel plateis obtained according to the effective section width of concrete in the corrugated steel plate; the section of the composite beam is converted into the section of the steel beam by adopting a section conversion method to calculate the equivalent section neutralization axis of the composite beam; and the centroid of the section of the steel beam is obtained through conversion of the elastic neutralization axis of the composite beam, the distance x between the centroid of the section of the steel beam and the topmost end of the section is calculated, moment taking is conducted on the neutralization axis through concrete and a steel component, and the flexural rigidity is calculated through the moment taking result.

The invention discloses an automatic valve cover ear milling machine. The machine is characterized in that the machine comprises a fixed seat and an overturning rack, the overturning rack is bidirectionally overturns on the fixed seat at 180DEG in a vertical direction and is promoted by an overturning mechanism, the overturned overturning rack is locked by an overturning locking mechanism, the overturning rack is provided with an upper workpiece positioning hole, a lower workpiece positioning hole, an upper workpiece clamping block and a lower workpiece clamping block, the upper portion of the fixed seat is provided with a clamping operating mechanism and a pre-positioning compaction mechanism, the lower portion of the fixed seat is provided with a milling power mechanism, the pre-positioning compaction mechanism pre-positions and compacts the workpiece in the upper workpiece positioning hole when the overturning rack is in an upward turning or downward turning position, the clamping operating mechanism operates the upper workpiece clamping block to act in order to clamp the workpiece in the upper workpiece positioning hole, and after the milling power mechanism is promoted by an upper swinging mechanism, two side ear milling of the workpiece in the lower workpiece positioning hole is carried out by a disk miller. The automatic valve cover ear milling machine can realize the automatic milling processing of two side ears of the valve cover, substantially improves the work efficiency, and improves the processing precision.

The invention relates to a vertical type suspension structure wind driven generator which comprises pneumatic devices, a power generation device, a suspension stand column, a suspension cross beam, bearing seats, a central stand column and a central stand column sleeve, wherein the top end of the suspension stand column is fixedly connected with the suspension cross beam, the central stand column is arranged on the outer side of the central stand column in a sleeved mode, the upper end of the central stand column sleeve is fixed on the suspension cross beam, a seam allowance is arranged on each section of the central stand column sleeve, multiple bearing seats are respectively arranged on the corresponding central stand column sleeve in a sleeved mode, and the lower end faces of bearings arranged in the bearing seats are pressed on the corresponding seam allowance. The pneumatic devices are arranged on the multiple bearing seats, and a power generator is connected with the pneumatic devices. By the technical scheme, tower type design is changed into hanging clock type design, so that bearing capacity of a whole wind driven generator is greatly improved, and the vertical type wind driven generator with the height of dozens of meters or even more can be manufactured. The vertical type suspension structure wind driven generator is simple in structure, and quite convenient to install and maintain, and greatly reduces manufacturing and maintenance cost.

The invention discloses a feeding and discharging method for PECVD surface coating. The feeding and discharging method comprises the steps of graphite boat positioning, feeding a graphite boat to a buffer frame, pushing the graphite boat onto a boat pushing mechanism, coating detection before boat feeding, feeding the graphite boat into a reaction chamber, discharging the graphite boat out of thereaction chamber, feeding the graphite boat on a conveying mechanism, coating detection before sheet taking, returning the graphite boat to a sheet inserting and taking machine and the like. Accordingto the invention, two coating detection steps are added on an inevitable path of the graphite boat; namely, firstly, a boat pushing detection mechanism detects whether a silicon wafer in a graphite boat which is about to enter a reaction chamber is coated or not, secondary coating in the reaction chamber is avoided; and secondly, whether the silicon wafer to enter the wafer inserting and taking machine on the conveying mechanism is coated or not is detected, and the silicon wafers which are not coated are prevented from flowing into the next process, so that each boat of silicon wafers are coated, repeated coating is avoided, the smoothness of a production process is guaranteed, the efficiency of the silicon wafers is more stable, and the quality of battery pieces is improved.