34results about How to "Improve jacking efficiency" patented technology

A multilevel speed regulation jack includes an input oil cylinder, an output oil cylinder, and a fluid conduit member between the cylinders. The output oil cylinder includes a cylinder body containing an annular space and a tube piston, which fits in the annular space. A sliding sleeve of the tube piston is movably positioned in the annular space. An annular in-flow oil chamber is formed between the end annular surface of the tube piston and the cylinder body, and a central in-flow oil chamber is formed between the inner central surface of the piston and the cylinder body. The fluid conduit member includes at least two parallel fluid channels connected to the central in-flow oil chamber and the annular in-flow oil chamber, respectively. A control valve in one of the fluid channels opens / closes the channel. The jack can automatically switch between different jacking speeds based on the load sensed by the system and therefore has a high jacking efficiency.

The invention provides a jacking mechanism, a jacking method and a tower crane with the jacking mechanism. The jacking mechanism comprises a climbing frame (11), a first jacking device (12) and a second jacking device (13), wherein the first jacking device (12) is fixedly connected to the climbing frame (11); and the second jacking device (13) is fixedly connected to the climbing frame (11) and enters a jacking readiness state when the first jacking device (12) jacks the climbing frame (11). The first jacking device (12) enters a jacking readiness state when the second jacking device (13) jacks the climbing frame (11), and the first jacking device (12) and the second jacking device (13) alternately jack the climbing frame (11). Jacking efficiency of the jacking mechanism can be effectively improved.

The invention provides a jacking mechanism, a jacking method and a tower crane with the jacking mechanism. The jacking mechanism comprises a climbing frame (11), a first jacking device (12) and a second jacking device (13), wherein the first jacking device (12) is fixedly connected to the climbing frame (11); and the second jacking device (13) is fixedly connected to the climbing frame (11) and enters a jacking readiness state when the first jacking device (12) jacks the climbing frame (11). The first jacking device (12) enters a jacking readiness state when the second jacking device (13) jacks the climbing frame (11), and the first jacking device (12) and the second jacking device (13) alternately jack the climbing frame (11). Jacking efficiency of the jacking mechanism can be effectively improved.

The invention discloses a gradient freezing storage device with a double-helix quick-freezing diversion function. The gradient freezing storage device comprises a fixing device, a transmission device, a quick-freezing device and a pre-cooling device, the transmission device is movably connected with the fixing device, the fixing device comprises a freezing chamber, a connecting pipe and a storage tank, and the freezing chamber is connected with the storage tank through the connecting pipe. The quick-freezing device is connected with the freezing chamber, the freezing chamber is provided with a freezing cavity, the pre-cooling device is connected with the freezing chamber in a fastened mode, one side of the freezing cavity is provided with a conveying outlet, the freezing cavity communicates with the conveying outlet, the storage tank is provided with a feeding port, the two ends of the connecting pipe communicate with the conveying outlet and the feeding port respectively, the storage tank is provided with a storage cavity, the feeding port communicates with the storage cavity, and the conveying outlet is located at the upper end of one side of the freezing cavity. The side, away from the conveying outlet, of the freezing cavity is provided with a conveying inlet, and the conveying inlet is located at the lower end of one side of the freezing cavity.

The invention belongs to the technical field of the automatic production of electronic connectors. A pin header clamping and inserting mechanism for pin header connecting terminal production comprisesa pin header cutting and inserting support, a pin header lifting module and a pin header clamping and inserting module. The pin header cutting and inserting support is arranged on a rack; a pin header clamping and inserting groove is formed in the top of the pin header cutting and inserting support; the pin header lifting module is located below the pin header cutting and inserting support, the pin header clamping and inserting module is located in the pin header clamping and inserting groove, and the pin header clamping and inserting module is used for clamping and inserting a set of cut-offpin header material strips into female headers. The pin header clamping and inserting mechanism has the advantages that the clamping firmness of pin headers is improved; the accuracy of pin header insertion positioning is improved; and the assembly quality of the pin headers and the female headers is improved.

The invention discloses a reinforcing device for a railway turnout area circuit during jacking for a frame bridge. The reinforcing device comprises a transversal beam and a longitudinal beam, wherein the transversal beam is placed right below a sleeper; a longitudinal steel plate is cushioned between the sleeper of a point rail switch part in a turnout area and the transversal beam; the transversal beam is connected with the sleeper by a U-shaped clamp, an overhead rail beam and a cover plate; and the steel plate is tightly clamped between the transversal beam and the sleeper. After the improvements aforementioned are performed for reinforcing the circuit, the steel plate is connected with the sleeper above the steel plate, the transversal beam below the sleeper and the overhead rail beam, so as to ensure that the whole point rail in a point rail range is located on one plane and then the point rail flexibly rotates in the plane and can be normally used; with the adoption of the reinforcing device disclosed by the invention, the situation that the railway turnout point-rail section circuit is reinforced into an integral structure which is stable and reliable can be effectively ensured, and normal use for a turnout during circuit reinforcement and frame bridge jacking construction is ensured, thus meeting the safety requirements of driving, and reducing the workloads of maintenance and repair.

The invention discloses a tower crane jacking anti-falling control device, which belongs to the technical field of tower cranes and comprises a climbing frame (1) and a step (6). The climbing frame includes an oil cylinder beam, a jacking oil cylinder, a jacking beam, and an oil cylinder beam Climbing claws (3) are installed on the top; the steps are installed on the outside of the standard section, and the climbing claws are suspension pawls, which are hingedly connected to the ear plate (2-1) welded on the cylinder beam through the pawl shaft (3-1). ), the distance between the center of the pawl shaft and the main chord of the standard section is less than the length of the suspension pawl; there is a fixing hole (6-1) in the middle of the step for supporting the support shaft (5-2) of the jacking beam, and the upper and lower Positioning slots (6-2) are provided at both ends; telescopic mechanisms are provided at both ends of the jacking beam. The climbing frame of the present invention does not need manual operation when stepping through the standard section. The jacking beam passes through the telescopic support shaft into the center hole of the standard section step, and uses the safety pin to position the telescopic support shaft, effectively preventing the oil cylinder from telescopic misoperation, safe and reliable high sex.

The invention relates to an integrated template type connection device for a jacking platform and a jacking method. The connection device comprises a connection plate and a first wall-attaching plate,wherein the connection plate is arranged at a corresponding position on a shear wall template; the first wall-attaching plate is fixedly arranged at one side on a lattice column, which is close to the shear wall template; the first wall-attaching plate is attached to the connection plate and is in detachable connection with the connection plate so as to fasten and connect the lattice column and the shear wall template. According to the connection device disclosed by the invention, the lattice column for supporting, which is arranged on the jacking platform, is directly attached to the shear wall template, and the lattice column is connected by a poured shear wall structure and the shear wall template which is not demoulded, so that in one aspect, powerful supporting is provided for the lattice column and use safety of the jacking platform is ensured, and in the other aspect, jacking efficiency of the jacking platform is improved, a user does not need to wait for a shear wall to be demoulded and reach set intensity, construction time can be shortened, and a construction period is saved.

The invention discloses a method for integrally jacking an airplane. The method comprises the steps that S1, the airplane is adjusted to be horizontal; S2, a tractor is used for dragging a plurality of jacks to the position, below corresponding top nests, of the airplane, and the centers of the top nests are positioned through a light beam emitter; S3, the jacks are adjusted to be horizontal, andthe positions of the jacks are finely adjusted to enable light beams emitted by the light beam emitter to vertically irradiate the centers of the corresponding top nests; S4, a power switch of each jack is turned on through an automatic control program, so that lifting cylinders of the jacks synchronously ascend, the airplane is lifted to the required target height, safety nuts on the lifting cylinders are driven to rotate through a motor while the lifting cylinders of the jacks ascend, and thus a constant distance is kept between the safety nuts and the outer cylinders of the jacks; and S5, the lifting cylinders of the jacks are synchronously descended until the jacks are separated from the top nests of the airplane after the airplane is maintained and detected, and the airplane is put down. The airplane jacking efficiency can be improved, and the labor intensity can be reduced.

The invention relates to the technical field of hydraulic equipment, and discloses a multi-oil-cylinder synchronous jacking system for a tower crane and the tower crane. The multi-oil-cylinder synchronous jacking system for the tower crane comprises an oil supply main oil path, a first reversing valve, at least two jacking oil cylinders, a first jacking control oil path, a second jacking control oil path and a speed adjusting valve, wherein the speed adjusting valve can control the flow of oil liquid entering the jacking oil cylinders, and accordingly the jacking oil cylinders can synchronously run. The multi-oil-cylinder synchronous jacking system effectively solves the technical problem that oil cylinder jacking of a double- cylinder jacking system is not synchronous, due to great improvement of the synchronous performance, the safety of the jacking system is enhanced, and the service life of guiding wheels is effectively prolonged. The jacking process is smoother, the operation timeis shortened, and efficiency is improved.

The invention relates to a construction method for auger jacking, which includes a screw jacking system. The screw jacking system includes a jacking device, a rotating device, a threaded pipe cap and a multi-section spliceable threaded pipe joint. The outer wall of the threaded pipe joint is Threads are provided, and a plurality of threaded pipe joints are spliced ​​head to tail to form a threaded pipe body, the threaded pipe cap is connected to the front end of the threaded pipe body, and the rotating device is arranged at the rear end of the threaded pipe body for In order to drive the threaded pipe body and the threaded pipe cap to rotate, the jacking device is arranged at the rear end of the rotating device to push the rotating device, the threaded pipe body and the threaded pipe cap forward During construction, there is no need to drill pilot holes, ream holes and discharge soil first, which can simplify the construction process, increase jacking efficiency, shorten the construction period, reduce construction safety and quality risks, reduce pipeline damage and overheating of jacking equipment The risk of damage, economic and social benefits are significantly improved.

The invention relates to a jacking jig frame for a main beam assembly. The jacking jig frame for the main beam assembly is characterized in that the jig frame comprises support frames, longitudinal jacking seats, jacking adjusting modules, jacking plates, a jacking cross beam and lateral jacking movement modules, wherein each jacking adjusting module adopts a lead screw transmission type structure, and adjusting handles can move horizontally, so that the longitudinal height adjustment is more convenient; and conveying rollers are arranged on the jacking cross beam, so that the lateral jackingmovement modules are capable of horizontally moving the main beam assembly with less labor and higher efficiency. The jacking jig frame for the main beam assembly is high in jacking efficiency, smallin occupied area, simple to operate and flexible to adjust.

The invention relates to a rapid overturning and tightly-abutting mechanism. An installation groove is formed in the top of the installation seat. An overturning block is hinged to the installation seat through small hinge shafts installed on side plates on the two edges of the installation groove. The small hinge shafts are installed on the side plates on the two edges of the installation groove. The overturning block can freely rotate with the small hinge shafts as the rotation center. When the overturning block is overturned to a limiting position, the overturning block abuts against the bottom of the installation groove. The overturning block is provided with a pin hole. A tightly-abutting shaft is assembled in the pin hole and can axially and freely move in the pin hole. A screwing-down handle is connected to threads at the left end of the pin hole in a threaded manner. The right end of the screwing-down handle is connected with the tightly-abutting shaft. The right end of the tightly-abutting shaft is used for tightly abutting against a workpiece and locating the workpiece. An overturning frame is hinged to the installation seat through hinge shafts. The hinge shafts are installed on the installation seat. The overturning frame can freely rotate with the hinge shafts as the rotation center. When overturning to the limiting position upwards, the overturning frame presses the overturning frame without exerting force. The rapid overturning and tightly-abutting mechanism is convenient to operate and capable of reliably and tightly abutting against the workpiece, rapidly leaving a workpiece machining area, expanding the machining range and shortening the operation time.

A rolling supporting type sealing device for an intermediate jacking station of a rectangular shield tube jacking machine comprises a supporting wheel device and an adjustable sealing device. The supporting wheel device and the adjustable sealing device are both arranged on a step face at the tail portion of a front casing, and the supporting wheel device and the adjustable sealing device are respectively fixed to the two ends of a blocking plate in a rear casing. The supporting wheel device comprises an external slide rail, a shield seal, a mandrel, an inner sliding beam, a stopping sealing cover and a puller bolt, wherein a supporting wheel is arranged on the inner sliding beam through the mandrel, the inner sliding beam is surrounded by the external slide rail, the stopping sealing cover is fixed to the external slide rail, and the puller bolt penetrates through an internal thread of the stopping sealing cover and is tightly attached to the top of the inner sliding beam. The supporting wheel device can roll relative to the tail portion of the front casing and can effectively guarantee the gap between the tail portion of the front casing and a foundation ring. Thus, the stability of the compression amount between the shield seal and the tail portion of the front casing is guaranteed, the service life of the shield seal is prolonged, the fitting degree between the jacking direction and the tunnel axis is improved, and the jacking efficiency is improved.

The invention belongs to the field of tower cranes, and particularly relates to an automatic jacking tower crane structure which comprises a jacking frame fixedly installed at the lower end of a tower crane rotary table, two hydraulic cylinders A, guide wheels, a tower section, an upward jacking mechanism and the like. The tail ends of the two hydraulic cylinders A are provided with push plates which are used for horizontally pulling the tower section which is hoisted to the platform through the hoisting trolley into the jacking frame; two hydraulic cylinders A can hoist a crane carriage to a tower section on a platform through a push plate to automatically pull the tower section into a jacking frame, and after the tower section is pulled into the jacking frame, an electric push rod B pushes a corresponding locking block to be inserted into a locking groove in a corresponding fixing block A to fasten and lock the tower section; and the reciprocating swing of the hydraulic cylinder B in the jacking process of the rotary table is completed by the electric push rod A, so that unmanned operation to a certain degree is realized, and effective technical support is provided for the subsequent intelligent unmanned operation of the tower crane.

The invention relates to a screw rod positioning mechanism for a hoisting machine. The accuracy of verticality of a screw rod in a pipe body of the hoisting machine is greatly improved by setting axial and radial positioning at the input end of the screw rod, so as to improve the jacking efficiency of the hoisting machine, prolong the service life and improve the convenience of operation.

The invention discloses a standard knot lead-in device for a self-lifting tower crane. The standard knot lead-in device comprises a top bearing base located at the upper end of a tower body, a cargo boom installed at the upper end of the top bearing base in a hinged mode, a peripheral sleeving frame installed between the lower end of the top bearing base and the upper end of the tower body in a sleeved mode, a front trolley, a rear trolley, a front pulley set and a rear pulley set, wherein the front trolley and the rear trolley are installed in the positions, at the bottom of the cargo boom, of a guide rail; the front pulley set is installed on the front trolley and composed of a front fixed pulley and a front movable pulley; and the rear pulley set is installed on the rear trolley and composed of a rear fixed pulley and a rear movable pulley. A space which is formed in an inner cavity of the peripheral sleeving frame and located between the two adjacent ends of the top bearing base and the tower body is an installation position of a to-be-led-in standard knot. The front and rear movable pulleys as well as the corresponding front and rear fixed pulleys are all provided with stand-by pin shaft holes. According to the standard knot lead-in device for the self-lifting tower crane, another equipment does not need to be arranged in the heightening process of the tower body, connection parts between the tower body and the top bearing base do not need to be disassembled and assembled repeatedly, continuous jacking operation is achieved, and the jacking efficiency is greatly improved; and meanwhile balance of the cargo boom of the tower crane is considered.