1368 results about "Jackscrew" patented technology

The invention provides PCB deviation detection equipment and a detection method, and relates to the technical field of PCB detection, a feeding arm and a carrying arm are matched with a partition adsorption and pressing assembly to be matched with a detection platform and a feeding platform, so that the problem of uneven adsorption of an FPC is effectively avoided; the detection platform adopts the adsorption assembly with adjustable spacing, and the levelness is accurately regulated and controlled by combining with the jackscrew adjusting piece, so that the detection platform can adapt to the layout of components on the back of the PCB to avoid interference, and can guarantee the bearing stability and eliminate the positioning deviation. Meanwhile, the detection method supports the combination of PCBs and FPCs with different characteristics in a terminal area, and by calculating X and Y bidirectional deviation values, the adaptive range is widened, the detection precision is improved, and the missing detection and false detection rate is reduced.

The invention discloses a large-diameter super-long permanent steel casing sinking positioning system and a construction method thereof. The large-diameter super-long permanent steel casing sinking positioning system comprises an adjustable lifting guide frame, an inner wall supporting component and a positioning monitoring and dynamic closed-loop deviation rectifying system. The guide frame is a double-layer guide frame with adjustable height so as to meet the sinking of steel casings with different lengths; transverse support members are arranged on the inner wall of the steel casing at equal intervals to prevent water pressure difference between the inside and outside of the steel casing at the deepwater position or local deformation under the action of impact load; the monitoring and dynamic closed-loop correction system comprises a total station scanner and a double-shaft inclinometer, the plane position and perpendicularity of the steel casing are fed back in real time, the steel casing is fixed through an automatic position adjusting jack and a V-shaped pressing block, the plane position and perpendicularity of the steel casing are dynamically corrected in real time, and it is ensured that the top face of the casing meets the construction standard. According to the positioning system and the construction method thereof, the technical problems of poor adaptability, low positioning precision, delayed deviation correction response and the like in the sinking process of a large-diameter super-long steel casing in a complex stratum in a deepwater area can be solved.

The utility model relates to a steel mould trolley for continuous pouring construction of a reinforced concrete structure of an electric power protective shed tunnel, which is characterized in that an internal mould trolley comprises two internal mould bottom beams, the tops of the two internal mould bottom beams are connected with an internal mould portal frame through internal mould lifting oil cylinders, and the internal mould portal frame is connected with an internal mould lifting oil cylinder; the top of the inner mold portal frame is fixedly connected with an inner top mold plate, the side portion of the inner mold portal frame is connected with an inner edge mold plate through a side mold oil cylinder, the inner edge mold plate is hinged to the inner top mold plate, the bottom of the inner mold bottom beam is connected with an inner mold wheel set, and the inner mold wheel set can enable an inner mold trolley to move along an inner rail through an inner mold driving mechanism. A jack is arranged at the bottom of the inner mold bottom beam, a plurality of supporting frames are further arranged below the inner mold bottom beam in the length direction of the inner mold bottom beam, each supporting frame comprises a first supporting beam and two second supporting beams, and the first supporting beams and the second supporting beams can be matched to form a triangular support. According to the steel mould trolley, lateral inclination or displacement of the trolley can be effectively avoided, and the pouring quality of a shed tunnel is guaranteed.

The invention is a jack base 10 of construction scaffolding which includes a base plate 20 that is fixed to the ground surface 1 and has a hole 21 formed through the center thereof; a screw shaft 30 whose lower end is engaged in the hinges 22,31 on opposite side of the periphery of the hole 21 on the base plate 20 and whose upper end is connected to the lower end of the vertical pipe 4; a support member 40 that is screwed to the screw shaft 30 and supports the vertical pipe 4 of the scaffolding 3; and a fixing bar 50 that penetrates the hole 21 in a swingable manner and is fixed by being embedded in a ground surface 1.

The invention discloses a variable-diameter drill bit for a rotary jet grouting anchor cable and a construction method, and the variable-diameter drill bit comprises a drill rod, an outer pipe, a jack, an adjustable drill bit and a supporting assembly; the fixed end of the jack is connected to the end of the drill rod, and the movable end of the jack is hinged to one end of the adjustable drill bit. A blade is arranged at the other end of the adjustable drill bit, and the cutting diameter of the adjustable drill bit can be adjusted through the jack; the supporting assembly is arranged on the outer side of the outer pipe. A supporting assembly is arranged on the outer side of the outer pipe, the movable end of the supporting assembly is connected with the adjustable drill bit, and when the adjustable drill bit conducts angle adjustment, the supporting assembly is configured to change the outer diameter of the supporting assembly, so that the hole channel is adaptively supported. The problems that in the prior art, the hole forming diameter of the rotary jet grouting anchor cable is uncontrollable, holes are prone to collapsing under the complex geology, the construction efficiency is low, and the anchor cable failure risk is high are solved, and the technical purposes of precise hole forming of the rotary jet grouting anchor cable and safe and efficient construction are achieved.

The invention belongs to the technical field of lifting tools, and particularly discloses a lifting device oil way system, a lifting device, a jack, a pressing machine and a crane. The oil way system of the lifting device comprises a lifting oil cylinder, an oil tank, a first oil inlet way, a second oil inlet way and an oil return pipeline, the first oil inlet path is an oil inlet path of the gear pump assembly; and the second oil inlet path is an oil inlet path of the plunger pump assembly. When the lifting device is in the no-load or low-pressure condition, the gear pump assembly can rapidly pump in much hydraulic oil with small pressure so that the lifting device can rapidly ascend or descend, the defect that in the prior art, the displacement speed of a hydraulic lifting pump is low under the no-load or low-pressure condition is overcome, and the user experience is improved; when the hydraulic lifting pump is in a high-pressure condition, the plunger pump assembly can pump high-pressure hydraulic oil into the lifting oil cylinder so that the lifting oil cylinder can ascend or descend slowly, the lifting device can move slowly, and the normal use requirement of a user is met.

The invention discloses an auxiliary dismounting mechanism for a transmission shaft sleeve, and relates to the technical field of transmission equipment overhaul, the auxiliary dismounting mechanism comprises a front clamping plate, a rear clamping plate, a connecting piece and fastening bolts, the front clamping plate is mounted on the front side of the shaft sleeve, and four holes for fixing the fastening bolts are formed in the front clamping plate; the rear clamping plate is installed on the rear side of the shaft sleeve, and four holes used for fixing the fastening bolts are formed in the rear clamping plate. The connecting piece is installed on the rear side of the shaft sleeve, and two holes used for fixing the fastening bolts are formed in the connecting piece. The shaft sleeve auxiliary dismounting device is simple in structure, convenient to mount and operate and suitable for dismounting shaft sleeves of different specifications, and the shaft sleeve dismounting efficiency is greatly improved while the jack is firmly fixed and convenient to operate by applying pre-tightening force to the bolt and the safety is ensured.

The invention discloses a self-adaptive rectification jacking pipe intermediate jacking station system and a construction control method thereof. The jacking pipe intermediate jacking station system comprises an intermediate jacking station cylinder, a propelling execution mechanism, a sensing monitoring module and a control module. The intermediate jacking station cylinder is formed by connecting a front shell and a rear shell through a sliding sealing structure. The propulsion actuating mechanism is mounted between the front shell and the rear shell and consists of a plurality of hydraulic jacks which are distributed circumferentially; and the control module is configured with a thrust distribution algorithm and is in communication connection with the propulsion execution mechanism and the sensing monitoring module. The output pressure of the hydraulic jacks in different directions is independently adjusted through the control module according to real-time data fed back by the sensing monitoring module, and automatic deviation correction and thrust compensation of the system are achieved; the problems that in the prior art, thrust distribution is not uniform, and deviation rectification control lags behind are effectively solved, and the track precision and safety of pipe jacking construction are remarkably improved.

The utility model relates to belt dismounting technical field, propose a kind of device for fixing adhesive tape conveyer belt, including bottom plate, the top of the bottom plate is fixedly connected with support rod, the top of the bottom plate is provided with support replacement subassembly, the support replacement subassembly includes fixed bolster, one end of the fixed bolster is fixedly connected in the top of bottom plate, the side of the fixed bolster is provided with adjustment bracket, the top of the fixed bolster is fixedly connected with jack, the side of the support rod is provided with tail wheel, the circumference of the tail wheel is provided with belt, the end of the jack away from fixed bolster is set in the bottom of adjustment bracket, the belt is located on the displacement locus of adjustment bracket, the fixed bolster is provided with two. Through the above technical scheme, the technical problem that it is difficult to provide larger working space in the prior art, so that the operator can more easily dismount the old belt, the tail wheel roller.

The invention relates to an overall system conversion process after accumulative slippage of a space pipe truss, and relates to the technical field of steel structure construction. According to the process, a supporting bracket and a jack system are installed, and a mode of combining graded unloading and lateral pushing is adopted, so that accurate conversion of a truss from a temporary supporting state to a design position is achieved. The method comprises the key steps of step-by-step unloading with 20 mm as a circulation unit, jack bottom supporting height adjustment, hydraulic synchronous control and lateral limiting measures. The method solves the problems of poor synchronism, stress concentration and the like in a traditional unloading method, has the advantages of high in-place precision, high in safety, high in construction efficiency and the like, and is suitable for construction of a large-span space pipe truss structure.

The invention belongs to the field of urban renewal construction, and relates to a method for adjusting elevation and landing in place in building translation construction. In the process that a building returns and resets to a newly-built basement top plate, firstly, a temporary platform composed of a heightening steel beam and a heightening steel cushion block is laid on the newly-built basement top plate in advance so as to solve the height difference problem existing between the newly-built basement top plate and a translation rail. Secondly, triangular haunching plates are additionally arranged at the corners of the wall clamping beams for supporting the building; and a landing jack is directly arranged below the haunching plate. By means of the arrangement mode, the eccentric bending moment borne by the underpinning structure is greatly reduced, and absolute safety in the landing process is ensured. And finally, a set of repeatable standardized circulating steps is designed, and the effect that the existing building is always reliably supported in the landing process is achieved. The invention aims to overcome the defects in the prior art, and provides the building translation landing method which is safe to operate, accurate to control and capable of effectively coordinating the foundation height difference and optimizing the landing stress path.

The invention belongs to the technical field of sail-shaped cable-stayed bridge construction, and relates to a long and thin structure arched steel tower installation method which comprises the steps that a bridge lower structure and a main tower are constructed, and an auxiliary tower root embedded section, a top connecting piece and related construction components are embedded in the main tower; during main tower construction, an attached tower fixing section and a main beam are synchronously installed, and the attached tower fixing section is fixedly connected with the main tower through welding and a steel truss set; a support is erected on a girder bridge floor, tower-attached sections are assembled according to the inverted arch posture, the pre-bias value and the pre-camber are preset, and rotating hinges are installed; a vertical rotating cable, a back cable and a cable wind cable which are made of steel strands are arranged, and testing is completed; one-time vertical rotation welding of one section of the attached tower is achieved through synchronous traction of a continuous jack, and then secondary vertical rotation is conducted on the whole section of the attached tower; after vertically rotating in place, welding and fixing, and dismounting related equipment and a bracket; the invention aims to solve the problems of high overhead operation risk, difficulty in control of construction precision, large temporary support investment, low work efficiency and insufficient adaptability of a traditional mounting method.

The utility model relates to the technical field of water conservancy pipeline construction, in particular to a water conservancy pipeline butt joint device. Comprising a connecting seat, two threaded rods are installed at the two ends of the connecting seat and rotationally connected with a first sliding seat and a second sliding seat correspondingly, a jack is installed in the second sliding seat, the output end of the jack is connected with a sliding block, supporting seats are installed above the first sliding seat and the sliding block correspondingly, and spiral springs are installed in the supporting seats; a top plate is connected to the top end of the spiral spring, an insertion rod is installed on the upper portion of the supporting base in an inserted mode, a rotating plate is installed on the upper portion of the insertion rod, a threaded column is welded to the end, away from the insertion rod, of the rotating plate, and a hoop is installed on the threaded column through a nut. When dislocation occurs during pipeline contact, the threaded rod is rotated to push the first sliding seat or the second sliding seat to move, then the two pipelines are pushed to be aligned, in this way, the positions of the pipelines can be accurately and reliably aligned, and the pipeline butt joint efficiency and effect are guaranteed.

The utility model relates to test fixture technical field, especially a solid state disk test fixture, including the bottom plate of horizontal setting, the top surface fixedly connected with frame of bottom plate, the top of frame is connected with the U type frame of sliding, the left and right sides of U type frame all are connected with two symmetrical settings locking bolt of rotation. The utility model's advantage lies in: this solid state disk test fixture drives the rotation of driving rod through motor, drives the cam to push the upward movement of lifting plate, makes the jackscrew steady and lifts the hard disk body. Spring provides the buffer force in the process of jacking, ensures that the separation process of hard disk body and test socket is even. This automatic ejection mechanism completely avoids the wear and tear problem of golden finger caused by uneven force when pulling out manually, and the accurate guidance of the jackscrew through the through hole makes the hard disk body keep vertical rising, protects the contact surface integrity of golden finger and test socket, and significantly improves the reliability and durability of test and plug.

The utility model discloses a dismounting tool for a valve guide pipe of a cylinder cover. The dismounting tool comprises a supporting frame, the lifting platform is vertically arranged in the supporting frame in a sliding mode, a jack is fixedly connected to the top of the lifting platform, an installation pipe used for installing an ejector rod is fixedly connected to the bottom of the lifting platform, and a reset piece is fixedly connected between the lifting platform and the connecting cross beam. Notches at the two ends are clamped on the outer side of the supporting frame, it is guaranteed that the lifting table can vertically slide, and operation is easy, convenient and stable. A reset piece (spring) is fixedly connected between the lifting table and the connecting cross beam, after the jack extends to eject the valve guide pipe out, the spring can drive the lifting table to automatically reset, a fixing plate in the clamping assembly is adjustably installed, and through arrangement of a rotating base and a limiting arc plate, the angle of a workpiece can be flexibly adjusted, so that the valve guide pipe corresponds to the position of an installation pipe.

The invention provides a bridge steel box girder linetype control method based on multistage monitoring and dynamic adjustment. The method comprises the steps that S1, inclination angle data, mileage data and section temperature difference of a bridge steel box girder and coordinate data of all control point positions continuously collected by a sensor network are obtained; s2, constructing a theoretical linear reference curve according to the inclination angle data, the mileage data and the section temperature difference, and generating a deformation vector according to the inclination angle data and the coordinate data; s3, generating an elevation variation vector according to the theoretical linear reference curve and the deformation vector, and introducing a shape function to solve the elevation variation vector so as to obtain a hydraulic adjustment amount; and S4, the hydraulic adjustment amount is input into a PID controller, and synchronous lifting control is conducted on the hydraulic jacks so that the supporting height can be adjusted. The method has the beneficial effects that dynamic lifting control over the hydraulic jack cluster can be achieved, and the control precision is improved.

The utility model discloses a prefabricating device of a pi-shaped beam plate, which comprises an outer side mold and an inner tube mold, a concrete pouring cavity is arranged between the inner tube mold and the outer side mold, and the inner tube mold is connected with the outer side mold through a support. The inner tube mold is provided with a bottom mold and at least two box-type bodies, each box-type body is composed of a top inner mold and four side inner molds, corner molds are arranged between the adjacent side inner molds and between the side inner molds and the top inner mold, the side inner molds are hinged to the bottom mold, the bottom mold is firmly fixed to the ground through foundation bolts, and the adjacent top inner molds are connected through connecting plates. The top inner mold, the side inner mold and the box-type body are arranged to form a closed box-type structure, the vertical linkage rod and the horizontal linkage rod are arranged to be matched with the hydraulic jack to form a hydraulic connecting rod type detachable split inner mold, and the situation that a mold plate is deformed due to high temperature and demolding adsorption force is generated is avoided.

The utility model relates to the technical field of airplane emergency rescue traction, in particular to an emergency runway separation device which comprises a hydraulic lifting device used for jacking airplane wheels and a trailer used for placing the airplane wheels, the hydraulic lifting device comprises an oil tank, a multi-stage hydraulic cylinder is installed at one end of the oil tank, a jacking head screw is installed on the multi-stage hydraulic cylinder, and the trailer is connected with the hydraulic lifting device. A hydraulic pump is installed at the other end of the oil tank, a low-pressure piston rocker and a high-pressure piston rocker are installed on the hydraulic pump, and handle temporary placing rods and inserting rods are installed on the two sides of the hydraulic pump; the trailer comprises a tire placing plate, and a front universal wheel is installed at one end of the tire placing plate. According to the device, the multi-stage hydraulic jack is adopted to quickly jack up the airplane wheels, the trailer can be conveniently placed below the airplane wheels, the airplane can slowly descend through the multi-stage hydraulic jack so that the airplane wheels can be placed on the trailer, and the airplane can be conveniently dragged and moved through the trailer.

The utility model discloses a cable T-shaped head dismounting tool, and relates to the cable prediction experiment detection auxiliary technology field, the cable prediction auxiliary equipment comprises a metal crossbeam, the middle part of the metal crossbeam is provided with a thread bushing, the thread bushing is internally in threaded connection with a jackscrew, and two sides of the metal crossbeam are respectively provided with a fixing member in a sliding manner. The cable T-shaped head is sleeved with the positioning assembly, the two sides of the positioning assembly are fixed through the two sets of fixing pieces, and the jackscrew is driven to rotate through an electric wrench. The clamping ring I and the clamping ring II are fixed on the cable T-shaped head, the positions of the two groups of metal rods are adjusted according to the sizes of the clamping ring I and the clamping ring II, the clamping ring I and the clamping ring II are hooked by the claw hook, the jackscrew is rotated through the electric wrench, and the metal cross beam drives the metal rods, the clamping ring I, the clamping ring II and the cable T-shaped head to move through the rotation of the jackscrew. And the step of using more disassembling tools in a traditional disassembling mode is omitted, and time and labor are saved.

The utility model relates to the technical field of jacks, and discloses an oil leakage prevention hydraulic jack which is characterized in that steel balls are connected to the outer walls of mounting rods on the two sides, first springs are arranged outside the mounting rods on the two sides, and connecting blocks are connected to the interiors of a first oil inlet and a second oil inlet; according to the oil leakage prevention hydraulic jack, when the piston block moves upwards, due to the fact that the lower portion of the sealing cover is fixed to the sealing sleeve, the sealing sleeve can contract along with the piston block, and the piston block can be prevented from leaking out of the piston block. In this way, the upper end of the pump body can be completely sealed through the sealing cover and the sealing sleeve, oil leakage of the pump body is effectively prevented, secondly, hydraulic oil is prevented from leaking from the abutting joint position of the piston rod and the inner wall of the cylinder body through the arrangement of the oil sealing rings on the two sides, backflow of the hydraulic oil during use is avoided, and therefore the safety and reliability of the hydraulic jack can be greatly improved.

An adjusting mechanism comprises at least one adjusting jackscrew and further comprises a flexible reed corresponding to the adjusting jackscrew, the adjusting jackscrew abuts against the flexible reed, and the shape of the flexible reed is changed by adjusting the adjusting jackscrew. The adjusting jackscrew acts on the flexible reed, and the adjusting precision is higher through deformation adjustment of the flexible reed.

A kind of whole lifting installation tool for ancient building bluestone well lid, including support frame, the middle part of support frame forms the opening area matching with the size of bluestone well lid body, the bottom surface of support frame is installed with the liftable travelling mechanism on the position of four corners, support frame is slidably equipped with multiple slide sleeves on the two beams oppositely arranged, slide sleeve is installed with locking mechanism for locking the position of its sliding on beam, vertical jacks and well lid lifting device matched with well lid lifting hole are installed on the bottom side of slide sleeve, the jacking section of jack is fixedly connected with the bottom side of slide sleeve, support section faces ground, outer frame top pressing mechanism is hinged on the side of opening area on the jacking section of jack, outer frame top pressing mechanism includes telescopic rod and support base plate, one end of telescopic rod is hinged on jack, and the other end is hinged with support base plate.The device is convenient to move, prevents outer frame from being lifted, lifting device is stable, is convenient to adjust, saves time and labor and improves efficiency.

The utility model discloses an adjustable pressure reducing valve structure of an airplane wheel jack, which relates to the field of pressure reducing valves and comprises a hydraulic manifold block, a one-way valve is arranged at the bottom of the hydraulic manifold block and comprises a one-way hole arranged at the bottom of the hydraulic manifold block, and a one-way valve steel ball and a one-way valve seat are sequentially arranged in the one-way hole from top to bottom. An overflow valve is arranged on one side of the hydraulic integrated block and comprises an overflow hole formed in one side of the hydraulic integrated block, and an overflow valve steel ball, an overflow valve seat, an overflow valve spring and an overflow valve element are sequentially arranged in the overflow hole from inside to outside. Compared with an existing pressure reducing valve, the pressure reducing valve has the advantages that the space of the pressure reducing valve is effectively saved, good pressure reducing performance is guaranteed, the pressure difference between the pressure of a low-pressure hand pump and the pressure of a high-pressure hand pump is reliable, pressure reduction is achieved, and the pressure reducing valve is compact in structure, light in weight and small in size.

The utility model discloses a rerailing bridge rescue device which comprises a motor vehicle, a rerailing bridge, a rotating assembly, a lifting assembly, a transverse moving oil cylinder and a jack. The rotating assembly is arranged on a motor vehicle and used for driving the re-railing bridge to rotate so that the re-railing bridge can be perpendicular to a rail. The lifting assembly is arranged on the rotating assembly, and the lifting assembly is used for driving the re-railing bridge to descend so that the re-railing bridge can fall onto a rail; the transverse moving oil cylinder is placed on the re-railing bridge and used for bearing the rail car. The rerailing bridge has the advantages that the rerailing bridge is installed on the motor vehicle in advance, the rerailing bridge can quickly reach a derailing site by means of maneuverability of the motor vehicle, extra hoisting equipment for transportation is not needed, construction efficiency is improved, and the rerailing bridge can be installed on the motor vehicle in advance and can quickly reach the derailing site by means of the maneuverability of the motor vehicle. And the construction cost is reduced.

The utility model discloses a stable installation's rail transit forging hoop structure belongs to the technical field of hoop, a stable installation's rail transit forging hoop structure, including U type hoop, the U type hoop is including base and top buckle, is provided with the lock groove between top buckle and base, the inside of lock groove is provided with the metal backing plate, the inside of base is provided with the oblique groove, and the oblique groove extends to the inside of lock groove, the inside of oblique groove is provided with the jackscrew subassembly. To solve the problem that the track is directly acted on the backing plate in the use process and is influenced by the vibration, and with the lapse of time, the backing plate and the hoop will be loose, thereby affecting the stability of the track, the counterbore of metal backing plate and the ball form spherical surface contact, and the backing plate is allowed to be fine in three -dimensional direction, and the supporting spring continuously provides the pre -tightening force, even if the backing plate produces abrasion because of long -term use, and the ball can still closely adhere to the counterbore, and the constant compression force is maintained.