34results about How to "Adjustable span" patented technology

The invention provides a hydraulic double-type crane which comprises a gantry unit, a skidding unit and dismounting and mounting units, wherein the gantry unit comprises gantry top sections, at least one gantry standard section connected to the lower parts of the gantry top sections as well as gantry bases connected below the gantry standard section; the dismounting and mounting units are connected to the gantry bases and comprise gantry self-dismounting and mounting systems and jacking sleeve frames; and the skidding unit is connected above the gantry top sections and comprises a skidding beam, a skidding bearing beam and a skidding beam skidding mechanism which can drive the skidding beam to skid on the skidding bearing beam. According to the hydraulic double-type crane, no-load and loaded skidding of the skidding beam can be achieved, and the skidding beam span can be adjusted.

The invention discloses a long-slab-span steel beam cast-in-situ floor formwork system, which comprises a floor template, an adjustable truss and an adjustable placement support seat for supporting the adjustable truss, wherein a grille is laid on the adjustable truss; the floor template is laid on the grille; the adjustable placement support seat is arranged on a lower flange of a transverse H-shaped steel beam; and the adjustable truss is a telescopic combined truss and is connected with the upper end of the adjustable placement support seat. Compared with the conventional normal truss formwork system, the long-slab-span steel beam cast-in-situ floor formwork system provided according to the invention has the advantages of adjustable span, adjustable height and suitability for different beam heights; the adaptability of the truss is greatly improved; and the formwork cost is greatly lowered.

The invention discloses a portable luggable computer heat dissipation device which comprises a left base and a right base. A group of damping springs is arranged on the left base and the right base respectively, the upper ends of the damping springs are matched with lifting sleeves, one end of each lifting sleeve is in screwed connection with a lifting bolt, the end of each lifting bolt is rotatably matched with a lifting push block arranged inside the corresponding lifting sleeve, the lifting push blocks are matched with lifting frames arranged inside the lifting sleeves, a group of cooling fans and carriages is arranged on the left base and the right base respectively, the carriage on the left base is connected with the carriage on the right base through a carriage telescoping rod, refrigeration frames penetrate into the carriages, and a group of semiconductor refrigerating sheets are arranged on the refrigeration frames. The portable luggable computer heat dissipation device is stable to place, has the characteristic of stretchable extension, is wide in applicability, can provide good bottom ventilation conditions for a luggable computer, further has a local refrigeration role and has pertinence in heat dissipation.

The invention belongs to the field of agricultural and animal husbandry machinery, and particularly relates to an adjustable frame of a potato harvester. The adjustable frame of the potato harvester has functions that the span is adjustable, the frame is liftable, and operation requirements for different road conditions, work requirements and ground slopes are met. The adjustable frame of the potato harvester comprises a mounting frame, an adjusting rack, a right walking wheel axle, a seat equipped hoist cylinder, a front-rear adjusting rack welding piece, a front-rear adjuster and a span adjusting rack, wherein the adjusting rack is located on the right side of the adjustable frame ad are matched in two positions with the mounting frame for mounting and fixing; the seat equipped hoist cylinder is located on the right side of the adjusting rack, is hinged and fixed with the adjusting rack through a thick hinge pin and in rigid connection and fixation with the right walking wheel axle through a bolt B and a nut B, and a vertical shaft is welded on the seat equipped hoist cylinder and hinged and fixed with the front-rear adjusting rack welding piece; and the front-rear adjusting rack welding piece is located at the front lower part of the seat equipped hoist cylinder, and is connected and fixed in two positions with the mounting frame through the span adjusting rack and the front-rear adjuster.

The invention provides a large-truss-height adjustable suspended splicing combined type frame steel arch frame and an integrated large-span arch ring integral pouring process, the steel arch frame comprises an arch foot section, a standard section, an adjusting section, a closing section and a closing device which are sequentially connected in the arch arc line direction, and a plurality of sections arranged side by side in the arch width direction form an arch rib; the adjacent arch ribs are transversely connected through horizontal connecting pieces and vertical connecting pieces, the upper layer truss, the lower layer truss and the vertical frame are jointly spliced to form the overall stress type arch frame, and the connecting portion of the upper layer truss and the lower layer truss is located at the arc line of the middle of the arch. The process comprises the following steps: loading steel arch frame sections in a stacking manner, transporting the steel arch frame sections to a construction site, constructing arch foot sections, constructing standard sections, adjusting the sections, folding the sections, folding the steel arch frames, supporting an arch mold, and carrying out integral cast-in-place construction. The large-span steel arch has the advantages of being good in overall stability, uniform in stress, high in strength, adjustable in span, adjustable in arc, adjustable in breadth and the like, and the problems of transportation and construction of the large-span steel arch are solved.

The invention relates to construction protection equipment, in particular to a self-anchored adjustable pedal for erection of a high-altitude catwalk. Steel angles are arranged at two ends of each steel plate of the self-anchored adjustable pedal for erection of the high-altitude catwalk respectively, a plurality of vertical rods are arranged on the steel plate, and a lifeline is arranged between the vertical rods; self-anchored buckles are arranged on one steel angle at one end of each steel plate to form an anchoring end, and a combined sealable sliding chute is formed in the steel angle at the other end of each steel plate to form a sliding end; the anchoring ends and the sliding ends of a plurality of steel plates are mutually inserted and mutually spliced forwards and backwards to form the high-altitude catwalk. According to the self-anchored adjustable pedal for erection of the high-altitude catwalk, a few special requirements for erection of the catwalk on a structure cable are met, the span and the left-right height are adjusted, the structure cable can slide in the sealable sliding chute, the anchoring is reliable, and a flexible rubber cover for wrapping has an omnibearing protection function on the structure cable. The pedal is simple to process, firm to use, easy to mount and convenient to dismount.

The invention provides a hydraulic double-type crane which comprises a gantry unit, a skidding unit and dismounting and mounting units, wherein the gantry unit comprises gantry top sections, at least one gantry standard section connected to the lower parts of the gantry top sections as well as gantry bases connected below the gantry standard section; the dismounting and mounting units are connected to the gantry bases and comprise gantry self-dismounting and mounting systems and jacking sleeve frames; and the skidding unit is connected above the gantry top sections and comprises a skidding beam, a skidding bearing beam and a skidding beam skidding mechanism which can drive the skidding beam to skid on the skidding bearing beam. According to the hydraulic double-type crane, no-load and loaded skidding of the skidding beam can be achieved, and the skidding beam span can be adjusted.

The invention provides an arc-length-variable wire cutting saw for machining crisp and hard materials in the technical field of mechanical manufacturing and applied to extreme machining. The arc-length-variable wire cutting saw comprises a wire guide wheel drive mechanism, a wire cylinder and wire conveying mechanism, a wire tension adjusting and controlling mechanism, a driving and cutting mechanism, a stand column and beam and a workbench. The workbench is installed on a lower beam body of the stand column and beam. The wire cylinder and wire conveying mechanism is arranged on an upper beam body of the stand column and beam. The wire tension adjusting and controlling mechanism and the driving and cutting mechanism are arranged on a stand column of the stand column and beam. The wire guide wheel drive mechanism is fixed to the upper end of the stand column of the stand column and beam. A second lead screw is driven by a synchronous belt to rotate so as to drive a fist sliding base matched with the second lead screw to move up and down along a second guide rail. A first wire guide wheel and an adjusting wheel are fixed to the first sliding base through bearings. By means of the arc-length-variable wire cutting saw, the sawing wire can be much fine, and the saw seam width is lowered; the using rate is increased, and the span of cutting wheels of the wire saw is adjustable; and the wire cutting saw is small in saw shearing force, few in cuttings, low in noise, smooth and orderly in cut face, simple in structure and low in cost.

The invention discloses a transmission line release and withdrawal crossing speeder, which belongs to the field of installation, maintenance and repair equipment for overhead lines or cables, and is used to solve the need to lower the crossing 10kv line during the transmission line release and withdrawal process. ground, resulting in low work efficiency. The present invention comprises a bearing frame and two left-right symmetrical brackets; the bracket includes two bracket legs, the tops of the bracket legs are connected together, the two bracket legs form a triangular structure with the ground, and pulleys and fixed ropes are installed at the bottom ends of the bracket legs; the bearing frame includes A rotating rod and a fixed rod, the rotating rod is located between two support rods, pulleys are fixed at both ends of the rotating rod, and the fixed rod is fixedly connected with the bracket. The invention has a wide range of applications, can significantly improve the work efficiency of setting and withdrawing wires, and can protect the crossed wires at the same time.

The invention discloses a construction method of a reinforced concrete multi-span arch bridge or a continuous box structure bridge. The method is implemented according to the following steps: step 1) constructing the lower part structure of the arch bridge, wherein the lower part structure comprises a foundation, a middle pier and a bridge abutment; step 2) fixing flexible cables to piers of the arch bridge, fixing ground anchors through the flexible cables, and fixing the ground anchors to a ground to balance the horizontal force borne by the pier; step 3) erecting arch supports on each span of the bridge; step 4) constructing the upper part structure of the arch bridge on the arch supports; and step 5) removing the flexible cables and the arch supports. The construction method is simple in technology, reliable in quality, low in construction cost and rapider in construction speed, and the safety risk is lowered.

The invention discloses a multi-axis 3D printer with the adjustable span. The multi-axis 3D printer with the adjustable span comprises a guiding support body and a guide rail which is fixedly connected with the guiding support body and extends horizontally. The guiding support body is provided with a first communicating hole and a second communicating hole. The first communicating hole and the second communicating hole can receive molten raw materials and guide the molten raw materials to flow. The guiding support body is further provided with a guide groove which is arranged in the guide direction of the guide rail and arranged on the surface of the guiding support body in a penetrating manner. The bottom plane of the guide rail is higher than the bottom plane of the guiding support body in the vertical direction. The bottom discharging end of the second communicating hole is arranged on the bottom plane of the guide rail in a penetrating manner. The bottom discharging end of the first communicating hole is arranged on the bottom plane of the guiding support body in a penetrating manner. A first extrusion mechanism is connected with the lower side of the guiding support body and can receive the molten raw materials flowing out from the first communicating hole. A second extrusion mechanism is further connected to the guiding support body in a sliding manner and can move in the guiding direction of the guide rail and receive the molten raw materials flowing out from the second communicating hole.