38results about How to "Avoid eccentric force" patented technology

The invention provides a pavement material direct tensile test apparatus with eccentric tension avoided and method thereof, and the apparatus comprises a test part, a detected part installed in the test part, and electromagnetic force control part, wherein, the test part comprises a hinged base on the spherical shape, and a spherical lower hinged base matched with the spherical upper hinged base, and the spherical upper hinged base is installed with a upper link which is connected to a mechanics test and simulation testing machine, and the spherical lower hinged base is connected with a cast iron block by the lower pull bar, and the test part is installed between the spherical upper hinged base and the spherical lower hinged base; the electromagnetic force control part is connected with the cast iron block. Because of the flexibly rotary spherical hinged base, in the test process, when the test part is tensioned, the test part can naturally drop depending on gravity, thereby the eccentric force being effected on the detected part during tensile test is avoided, and the test result is more accurate, in addition, the invention has the advantages of simple structure, convenient operation, economic utility, reliable test data provision and minimized test error.

The invention provides a device used for testing interlaminar interfacial shear strength of a fiber composite material bar, and belongs to the technical field of devices used for testing interlaminarinterfacial shear strength of fiber composite material bars. The center of a bearing pedestal is provided with a cavity for a bar to be tested. The bearing pedestal below the cavity for the bar to betested is provided with a through hole. A fixing top cover is threaded to the bearing pedestal. The center of the fixing top cover is provided with a pressing bar hole. A force bearing pressing bar isconnected to the pressing bar hole in the fixing top cover in an up-down sliding manner. The top end of the force bearing pressing bar is fixed to a force bearing bar top disc. The inner hole diameter of the bearing pedestal and the height of the cavity can be designed according to different fiber bar diameters and testing heights, and shear strength of different cross sections can be obtained byadopting different pressing bar diameters, and therefore the application range of the device is wide. The fixing top cover firmly fixes the force bearing pressing bar to the bearing pedestal throughthreaded connection, thus ensuring vertical forcing applying on a fiber bar in a testing process of the device, and avoiding eccentric force applying.

The invention discloses a method for processing a piston inner cavity of a middle cylinder and belongs to the field of quartering hammer processing. The method comprises the steps as follows: firstly, a piston hole and an oil inflow hole are drilled on a boring machine; then, a middle cylinder fixing mechanism is used for location and fixing to guarantee that the middle cylinder is attached to the datum plane; next, static balance debugging is performed for processing; the piston hole is processed firstly, a valve hole and a step surface hole are then processed, and the oil inflow hole and an oil outflow hole are processed with a special tool on a lathe tool shaft bar. The piston inner cavity of the middle cylinder is processed in cooperation with a high-strength cylinder fixing mechanism, the weight of the middle cylinder can be balanced, and the processing precision is high; by means of the processed oil holes, the performance of the middle cylinder can be further improve, and accordingly, the processing quality is greatly improved.

The invention discloses an existing cutting broadening roadbed structure in a karst area. The structure comprises a basement karst cave area and a basement non-karst cave area. The basement karst cavearea is provided with long piles and short piles, the basement non-karst cave area is provided with short piles, the bottoms of the long piles are arranged in a stable stratum below the basement karst cave area, light replacement bodies are arranged on the tops of the long piles and the tops of the short piles and filled with soil fillers, and drainage ditches are formed in two sides of the lightreplacement bodies. The light soil material is low in density and high in pressure resistance, so that the additional stress for widening the roadbed is reduced; the light replacement body can improve the structural integrity, enables the load of an upper structure to be smoothly transmitted to the lower long pile and the lower short pile, so that the eccentric force is avoided; the load of an upper roadbed, a rail and a train is carried effectively, an equal-load replacement effect is realized, the additional stress acting on a karst cave top plate is reduced effectively, and deformation anddamage are avoided. On the basis of the structure, upward arching of an existing cutting caused by grouting can be avoided, and safe operation of a high-speed train is guaranteed; the structure is low in engineering cost, and engineering investment is effectively controlled.

The invention discloses a gantry type three-shaft numerical control riveting machine. The machine comprises a machine base, the bottom of the machine base is supported by an adjusting cushion iron, astand column and a cross beam are fixedly arranged on the upper end face of the machine base, and the machine base, the stand column and the cross beam form a gantry type structure; a workbench is further installed on the machine base, the workbench is positioned on the lower side of the gantry type structure which is composed of the machine base, the stand column and the cross beam, an X-shaft servo motor is fixedly installed on the machine base, and a rotating shaft of the X-shaft servo motor is fixedly connected with a X-shaft screw rod; and the X-shaft screw rod is in transmission connection with an X-shaft sliding plate on a X-shaft linear line rail, a Y-shaft servo motor is fixedly installed on the X-shaft sliding plate, a Y-shaft screw rod is fixedly connected to an electric rotating shaft of the Y-shaft servo motor, and the Y-shaft screw rod is in transmission connection with a Y-shaft sliding plate located on the Y-shaft linear guide rail. According to the machine, the gantrytype three-shaft numerical control riveting machine has the advantages of being labor-saving, energy-saving, high in efficiency, high in stability and high in precision, and is worthy of popularization and application.

The invention relates to a high-pressure single-guide natural gas trap. The high-pressure single-guide natural gas trap is characterized in that an upper shell 11 is provided with a liquid diversion component 31 penetrating the upper middle of the upper shell, one end of the liquid diversion component 31 penetrates a flange fixing plate 32, a water inlet adapter tube 38 is welded at the other end of a welding connecting plate 33, a single-guide limit component 12 is connected to a fixable gasket 7, and a double-float link component 5 moves in a guide sleeve 46. One end of a long lever 50 is connected with a spool support 51, and the other end of the long lever 51 is connected with double floats 41. One end of a short lever 54 is connected with the spool support 51, and the other end of the short lever 54 is connected with a buoyancy increaser 20. A spool 55 is disposed in the spool support 51. A valve seat 58 is connected to a valve seat fixing plate 57 in a threaded manner. A connecting shaft 60 sequentially penetrates a fixing block I59-1, a connecting block I56-1, a connecting block II56-2 and a fixing block II59-2 to connect the spool support 51 and the valve seat fixing plate 57 together. A valve seat component connecting plate 24 is connected below the valve seat fixing plate 57. An outlet adapter tube 25 is welded at the lower end of a middle hole of the valve seat component connecting plate 24 and penetrates a split cavity wall. The high-pressure single-guide natural gas trap is small in size and low in cost and meets the technical requirement for no leakage.

The invention provides a color plate reverse ceiling upper-air sliding device and a reverse ceiling construction method. As for a traditional roof color plate inner plate, mounting work procedures arecomplex, needed environment factors are many, and consumption in the aspects of manpower, funds and machines is over large. The color plate reverse ceiling upper-air sliding device comprises two hanging baskets (6), the hanging baskets are connected with idler wheels (1) through U-shaped connecting devices (2), and the two hanging baskets are connected together through the U-shaped connecting devices, bolts (4) and connecting square steel (3). The outer ends of the U-shaped connecting devices are provided with protecting sleeves, the side edges of the U-shaped connecting devices are providedwith fixed pulley sets A (5), and the U-shaped connecting devices are placed on Z-shaped purlines (9). The two ends of the Z-shaped purlines are welded to I-shaped steel (8). The invention discloses the color plate reverse ceiling sliding device and a using method.

The invention discloses a basic structure for extra-high-voltage single-column guyed tower V-shaped stayguys. The basic structure comprises stayguys, a tower column connected by the stayguys, and a plurality of basic structure main bodies, wherein each basic structure main body comprises a base plate, an inclined main column fixed on the top surface of the base plate, a U-shaped stayguy rod of which one end is embedded into the inclined main column and the other end is exposed out of the top surface of the inclined main column, and a triangular connecting plate fixed on the exposed end of the U-shaped stayguy rod, the stayguys are fixed on the triangular connecting plate, two stayguys are arranged between each basic structure main body and the tower column in a V shape, the U-shaped stayguy rod is bent in the inclined main column, a bending line of the lower section is parallel to a geometric center line of the inclined main column, and a bending line of the upper section is parallel to a plane on which the two stayguys on the basic structure main body are positioned. The basic structure can be preferably matched with a V-shaped stayguy arrangement structure, the bearing requirement of an extra-high-voltage guyed tower can be satisfied, the quantity of foundations is reduced, the form is simple, and the basic structure is easy to realize.

The invention discloses a punching bar for secondary preformation of an inner hexagonal cylinder head. A circular truncated cone-shaped protrusion part is arranged in the middle of the head of the punching bar, and an inverted circular truncated cone is arranged at the top of the protrusion part. The invention further discloses a die for secondary preformation of the inner hexagonal cylinder headand a forming method of the inner hexagonal cylinder head. The punching bar for secondary preformation is structurally modified, so that when the inner hexagonal punching bar makes contact with a workpiece, positioning is accurate, center deviation is avoided, the situation that the inner hexagonal punching bar is broken due to eccentric force generated by the punching bar is avoided, and thus, the service life of the inner hexagonal punching bar is prolonged; and the die cost is reduced, the operation and replacement time is shortened, and the production efficiency is improved.

The invention discloses a prestressed carbon fiber-reinforced plastic plate anchorage device and a manufacturing method thereof. The device comprises an upper steel plate and a lower steel plate and the upper and lower steel plates are used for clamping a plate. The manufacturing method comprises that multiple wedge-shaped grooves are arranged between the upper and lower steel plates, the surfaces of the wedge-shaped grooves are uniformly coated with a release agent, the grooves are filled with epoxy resin, the upper and lower steel plates are fastened through anchor bolts, the plate is slowly inserted into one end of the two steel plates from the other end along the surface groove, and after the epoxy resin is completely cured, the plate is anchored to a concrete member to be reinforced through anchor bolts. The prestressed carbon fiber-reinforced plastic plate anchorage device is prepared through the above method. The anchorage device has a simple design, reasonable force transmission, good reliability and good stability. The anchorage device has high efficiency anchoring performances. The plate does not slide or the anchorage device inner plate is not damaged even if the carbon fiber plate can be stretched until cracking.

The invention relates to the field of building construction, in particular to a reverse construction method one-pile one-column connecting structure which comprises a steel pipe column casing and a steel rib column arranged at the upper end of the steel pipe column casing, a connecting assembly is arranged between the steel pipe column casing and the steel rib column, and the connecting assembly comprises a first connecting plate fixed in the steel pipe column casing and a second connecting plate fixed on the steel rib column. The invention discloses a construction method for one-pile-one-column connection through a reverse building method. The construction method comprises the steps that S1, coordinates of a constructed steel pipe column casing are measured; s2, a post-cast strip space of at least 300 centimeters is reserved in the steel pipe column casing; s3, the steel reinforced column is hoisted, the first connecting plate is inserted into the steel pipe column cylinder, then the position of the steel pipe column is rechecked on site and is checked with the position of the drawing, and the position of the steel reinforced column is properly adjusted according to the deviation condition; s4, the two semicircular plates are installed at a cylinder opening of the steel pipe column cylinder; and S5, concrete is poured into the post-cast strip space reserved in the steel pipe column casing. The connecting structure has the effect of improving the structural strength of the one-pile-one-column connecting joint.

The invention discloses a direction-adjustable ratchet wheel type self-locking movable joint which comprises a movable end, a fixed end and a direction-adjustable ratchet wheel mechanism. The movableend mainly comprises a movable end flange, a movable end rib plate, a movable end steel pipe, a movable end embedded steel pipe, movable end wing plates and a rack. The movable end rib plate is arranged between the movable end flange and the movable end steel pipe, and the movable end wing plates are symmetrically arranged on the two sides of the movable end steel pipe. One side of the fixed end steel pipe is provided with an opening, the movable end embedded steel pipe is embedded in the side, and the other side is coaxially connected with the fixed end flange. Fixed end wing plates are symmetrically arranged on the two sides of the opening end of the fixed end steel pipe and correspond to the movable end wing plates. The ratchet wheel is engaged with the rack, and movement of the rack can drive the ratchet wheel to rotate. A direction-adjusting handle is arranged outside the fixed end steel pipe, and a connecting rod penetrates through the fixed end steel pipe and a spring in the fixed end steel pipe to connect the ratchet and the direction-adjusting handle. The movable joint is simple and convenient in structure, free of redundant accessories, capable of being self-locked, convenient to erect and disassemble and capable of bearing pressure and tension at the same time.

The invention provides a tubular pile joint slurry leakage repairing method. Resin and an initiator are adopted to prepare a repairing agent; the slurry leakage joint of the tubular pile is filled with the repairing agent, a slurry leakage gap is repaired, the advantages of the resin that is in liquid state, is good in permeability, has no granular impurities and the like are utilized, the repairing agent can quickly permeate into the slurry leakage gap of the tubular pile, and meanwhile, the initiator in the repairing agent plays a role in accelerating resin solidification, so that the repairing agent can be quickly solidified, pile sinking can be performed after 24 hours after repairing, the slurry leakage gap is effectively filled, and eccentric stress and pile explosion during pile sinking are avoided.

The invention discloses an extruding machine. The extruding machine is characterized by comprising a feeding driving motor, a feeding transmission system, an extrusion screw driving motor, an extrusion transmission system, a feeding cabin and an extrusion cabin; the feeding driving motor is connected with the feeding transmission system through a speed reducer, and an output end of the feeding transmission system is connected to the feeding cabin; and the extrusion screw driving motor is connected with an extrusion transmission system through a reduction gearbox, and an output end of the extrusion transmission system is connected with the extrusion cabin. According to the extruding machine, an operating mechanism is arranged on driven gears, the driven gears are connected to transmission shafts through transmission gear sleeves, and the transmission gear sleeves are operated through the operating mechanism so that the time can be shortened and the efficiency can be improved when the gears are disassembled or replaced; and a universal rod structure is adopted in the operating mechanism so that the problem that the service life of a connecting rod is reduced because a large amount ofeccentric force is generated in the process of using a common connecting rod can be solved.

The invention discloses a composite light pile group pile bearing capacity detection device, system and method. The detection device comprises a support subsystem, a loading subsystem and a test subsystem, wherein the detection device is used for detecting a composite light pile group; the support subsystem comprises connecting steel bars, a light subbase and a bearing platform; the loading subsystem comprises a loading device, a pressure sensor, a main beam and a counter-force device; and the testing subsystem comprises a dial indicator, a horizontal grating tension sensor, a load sensor, a soil pressure box and a composite reinforcement cage dynamometer. The connecting steel bars can improve the integrity of the composite light pile and the light subbase; the bearing platform can transmit the acting force of the loading device for simulating the real load of the roadbed to the light subbase; the detection system comprises the detection device and the composite light pile group, the detection requirement of the bearing capacity of the composite light pile group can be met, the detection system can also be used for researching the stress characteristic and the deformation control effect, the light subbase can well simulate the actual engineering situation, and the engineering detection requirement is met.