2582 results about "Jackscrew" patented technology

A jack assembly that has a base member having a handle assembly extending therefrom, a remote control positioned in the handle assembly, a handle base section of the handle assembly that comprises a battery coupler and a control unit, an electric motor coupled to the base member and providing a torque to a gear assembly, the gear assembly coupled to a ball screw, a carriage slidably coupled to the base member, the carriage having a lift nut coupled thereto, the ball screw threaded through the lift nut such that rotation of the ball screw moves the lift nut, and carriage, linearly along the base member, and a lifting arm pivotally coupled to the carriage on one end and pivotally coupled to a pivot arm at an intermediate location.

The application provides a large-span bridge substructure vehicle-fire wind force real-time hybrid test platform and implementation method, the platform comprises a physical loading and transmission system, a T-shaped wind-fire coupling simulation system, a modularized prying integrated system, an intelligent control and calculation system and a multi-dimensional high-precision monitoring system. The method realizes real-time pre-test of the boundary displacement / force of the test piece through the construction of a numerical substructure fast calculation model based on LSTM and converts the boundary displacement / force into a loading instruction to drive the through core jack to realize thermal force coupling interactive loading; the T-shaped wind-fire coupling simulation system reproduces the real vehicle fire scene under the influence of the environmental wind. The test platform supports independent loading of any component of the cable system, can execute open space self-defined fire test and closed space standard fire test, and accurately analyzes the cable failure mode, critical temperature threshold and damage evolution law under fire through the multi-dimensional high-precision monitoring system, thereby providing a high-fidelity test platform and analysis method for fire resistance design of large-span bridges.

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 belongs to the technical field of bridge construction, and particularly relates to a single-point multiple-jack synchronous beam falling forced displacement method prestress applying method which comprises the steps that S1, a plurality of temporary supporting points are arranged beside a permanent support, and a self-locking type beam bearing mechanism is installed on each temporary supporting point; meanwhile, a hydraulic jack is arranged at each temporary supporting point, the multiple hydraulic jacks are connected to a PLC integrated hydraulic synchronous control system through hydraulic pipelines, and synchronous linkage mechanisms are arranged among the multiple hydraulic jacks. According to the single-point multiple-jack synchronous beam falling forced displacement method prestress applying method, when an inner jacking pipe sleeve pushes a supporting cushion block to ascend and descend, through meshing of a self-locking gear and two self-locking racks, a secondary telescopic block can be forcibly driven to move synchronously, so that continuous stretching and retracting of a bearing beam are achieved, the cushion block does not need to be manually replaced after single beam falling, and the working efficiency is improved. The system automatically adjusts the height to meet the multi-stroke circulating beam falling requirement, and the construction efficiency is improved.

The application relates to a combined device and method for vertical static load test of water anchor pile method. Two gantries are arranged at the two ends of a water bearing platform, a steel beam passes through the space of a to-be-tested foundation pile connecting assembly I and an anchor pile connecting assembly II in the shape of a Chinese character 'jing', and the two ends are respectively suspended below the cross beams of the gantries; the to-be-tested foundation pile connecting assembly I is arranged in the middle of the steel beam, two anchor pile connecting disc assemblies II are arranged at the two ends of the steel beam, the lower end surface of a connecting disc I of the to-be-tested foundation pile connecting assembly I and the lower end surface of a connecting disc II of the anchor pile connecting assembly II are located on the same horizontal plane; a pulling jack is arranged between an upper tensile small cross beam I of the to-be-tested foundation pile connecting assembly I and the steel beam; a compression jack is arranged between the steel beam and the connecting disc I of the to-be-tested foundation pile connecting assembly I; and a recording platform is arranged beside the to-be-tested foundation pile below the middle part of the steel beam. The application combines the compression and pulling static load test devices into one, can be easily converted, is quickly installed, and the test result is reliable.

Disclosed is a top-driven jack, including an outer pipe, an inner pipe, a lead screw, a nut, a fixed part, and a handle; the inner pipe extends into the outer pipe; the nut is fixedly mounted on the inner pipe; the lead screw is movably mounted in the outer pipe through the fixed part and extends into the inner pipe, and is engaged with the nut; the fixed part includes a fixed seat and a movable sleeve; a connecting hole and an accommodating hole are formed in the movable sleeve; a connecting section is arranged at one end of the lead screw; the movable sleeve is movably connected with the fixed seat and embedded into the connecting hole through the connecting section and synchronously moves with the lead screw in the circumferential direction around the central line of the lead screw.

The invention relates to a bridge abutment settlement deformation monitoring device and method, and belongs to the field of bridge monitoring, the bridge abutment settlement deformation monitoring device comprises two bearing frames arranged on one side of a bridge pier and a steel wire rope I arranged between the bearing frames and used for supporting a connecting support, and the top of the connecting support is provided with a monitoring mechanism; the monitoring mechanism comprises a plurality of piston cylinders adjustably arranged at the top of the connecting support, piston push rods are slidably arranged at the tops of the piston cylinders, extension rod pieces fixedly connected with the piston push rods are fixedly arranged on one side of the pier, and display sleeves are fixedly arranged on the two sides of the connecting support. The display sleeve is communicated with the piston cylinder body through a connecting pipeline and used for transmitting liquid prefabricated in the piston cylinder body, and a piston sliding block is arranged in the display sleeve in a sliding mode. The double steel wire ropes and the tension jack form an elastic supporting system to buffer vibration, the hydraulic linkage design converts tiny settlement into visual displacement, the spring reset mechanism is matched to improve data reliability, automatic reset is achieved, continuous monitoring is supported, and the monitoring range is expanded.

The utility model provides an adjusting device of a heavy load leveling mechanism of a track engineering vehicle, which comprises a jack, the bottom of the jack is rotatably connected with a rotating seat, the bottom of the rotating seat is fixedly provided with a bottom plate, the side surface of the bottom plate is fixedly provided with a side plate, the top of the side plate is fixedly provided with a threaded sleeve, and the threaded sleeve is fixedly provided with a threaded hole. The inner side face of the threaded sleeve is in threaded connection with a lead screw, a rotating handle is fixedly installed at the top of the lead screw, and a top plate is rotationally connected to the top of the rotating handle. The adjusting equipment of the heavy-load leveling mechanism of the rail engineering vehicle effectively solves the problems that due to the fact that the weight of leveling mechanism equipment and materials is large, the deflection change of a vehicle frame is large under the action of gravity, the positions of three installation bases and hinge pins are changed, the coaxiality of the hinge pins is out of tolerance, and the service life of the hinge pins is prolonged. And therefore, the leveling mechanism is blocked in rotation and even cannot rotate.

The invention relates to a sleeper lateral resistance testing device considering the service state change of a ballast track. The sleeper lateral resistance testing device comprises a suspension assembly, a loading assembly and a measuring assembly, the suspension assembly comprises a suspension steel frame cross beam, a suspension steel frame side beam and a supporting cross beam; the suspension steel frame cross beam is installed on a steel rail, the supporting cross beam is installed on a sleeper, the suspension steel frame side beam is installed on a sliding rail of the supporting cross beam, and the side face of the suspension steel frame side beam is connected with the suspension steel frame cross beam; a side beam lower pressure sensor is mounted below the sliding rail; the loading assembly comprises two jacks which are arranged at symmetrical positions relative to a sleeper, and the jacks are arranged on a steel rail; the measuring assembly comprises a laser displacement sensor, a jack pressure sensor, a pressure data acquisition instrument, a displacement data acquisition instrument and a notebook computer; and continuous measurement of transverse resistance and displacement is realized. Compared with the prior art, the real service state can be kept; displacement can be accurately controlled; disturbance is reduced, and data reliability is high.

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 invention relates to the technical field of pipe jacking construction, and provides a pipe jacking jacking iron rapid locking and retracting device which comprises a jacking mechanism and O-shaped jacking iron, the jacking mechanism comprises a plurality of jacking jacks, and the ends of jacking piston rods of the jacking jacks are connected with end sockets; a clamping ring is arranged at one end, corresponding to the jacking jack, of the O-shaped jacking iron, a clamping assembly is arranged in the clamping ring, and the clamping assembly comprises a mounting groove, a buckling piece and an elastic piece. When the end of the jacking jack extends into the clamping ring, the buckling piece and the elastic piece are pressed to enter the mounting groove, and when the end of the jacking jack moves to the clamping gap, the elastic piece drives the buckling piece to reset and clamp the end. The clamping ring is further provided with a limiting mechanism used for limiting retraction of the elastic piece. The limiting mechanism comprises a limiting base, a limiting ratchet wheel, a limiting pawl and a limiting driving piece. The pipe-jacking jacking iron and the jacking jack can be rapidly and stably connected, and the effect that in the pipe-jacking construction process, the O-shaped jacking iron needs to be frequently and secondarily hoisted is effectively improved.

The invention relates to the technical field of nuclear power construction, in particular to a tensioning jack with a three-layer automatic locking tool anchor and a using method thereof.The tensioning jack comprises an oil cylinder, the right end of the oil cylinder is in threaded connection with an end cover, and a sealing plate is fixedly installed at the end, located on the inner side of the oil cylinder, of the end cover and is in sealed connection with the inner wall of the oil cylinder; the right end of a center penetrating sleeve is fixedly connected between the end cover and the sealing plate, the left end of the center penetrating sleeve extends into the left side of an inner cavity of the oil cylinder, a piston is slidably connected into the oil cylinder in a sealed mode, and the right side of the piston sleeves and is slidably connected to the outer wall of the center penetrating sleeve in a sealed mode. A second oil cavity is formed between the outer wall of the piston and an inner cavity of the oil cylinder, a three-layer automatic locking tool anchor assembly used for automatically anchoring the prestressed steel strand is arranged on the left side of the inner wall of the center penetrating sleeve, and an automatic anchor withdrawing assembly is arranged at the left end of the piston. According to the tensioning jack and the using method thereof, operation is easy and fast, and the tensioning efficiency can be improved.

The utility model relates to the technical field of lifting tools, and discloses a hand-cranking jack which comprises an adjusting assembly, an inner supporting piece and a hollow outer supporting piece used for jacking an object, the outer supporting piece is arranged on the inner supporting piece in a sleeved mode and makes contact with the outer surface of the inner supporting piece, the adjusting assembly is used for driving the outer supporting piece to integrally slide up and down, and when the outer supporting piece integrally slides up and down, the outer supporting piece is in contact with the outer surface of the inner supporting piece. The inner wall and the outer wall of the inner supporting piece guide and support the outer supporting piece. The adjusting assembly comprises a first bevel gear arranged in the outer supporting piece, a second bevel gear meshed with the first bevel gear and a screw rod rotationally connected with the outer supporting piece, the upper end of the screw rod is fixedly connected with the second bevel gear, the lower end of the screw rod extends into the inner supporting piece and is in threaded connection with the inner supporting piece, and the first bevel gear rotates to drive the screw rod to rotate. The first bevel gear drives the second bevel gear to horizontally and circumferentially rotate, and the second bevel gear drives the screw to horizontally and circumferentially rotate. According to the utility model, the contact surface can be increased, and the stability of the jack during lifting is improved.

The invention discloses a steel wire rope splicing device and method for deepwater salvage, and relates to the technical field of salvage and salvage of offshore sunken ships, the steel wire rope splicing device comprises a sunken ship, a crane ship and a crane installed on a deck of the crane ship, a stern side jack is arranged at the stern of the deck of the crane ship, and a bow side jack is arranged at the bow of the deck; a 80t anchor gear is arranged at one end of the stern side jack, and a wave compensator is arranged at the other end of the stern side jack; one end of the bow side jack is provided with a rope container used for storing bow side steel wire ropes, the crane is provided with two main hook steel wire ropes, each main hook steel wire rope is provided with a triangular plate, the main hook steel wire ropes are spliced or disassembled through the bow side steel wire ropes and a second steel wire rope, and the triangular plates can achieve switching of lifting force when the steel wire ropes are spliced; the stern side jack is used for bearing ship sinking acting force when the steel wire rope is spliced or detached; the ship bow side jack plays a role in temporarily fixing the steel wire rope B in seawater when the crane of the crane ship is connected with or dismantled from the steel wire rope B.

The utility model relates to a pushing construction auxiliary device which comprises a connecting block, a supporting plate is arranged at the upper end of the connecting block, a hemispherical block is fixed to the middle of the lower end face of the supporting plate, a hemispherical groove is formed in the middle of the upper end face of the connecting block, a plurality of first blind holes are evenly formed in the upper end face of the connecting block along the circumference, and a pushing block is arranged in each first blind hole. A second blind hole is formed in the lower end face of the connecting block, a piston block is arranged in the second blind hole, the upper end of the second blind hole communicates with the lower end of each first blind hole, and a cavity between the piston block and each ejector block is filled with hydraulic oil. Hydraulic oil in the first blind hole cannot flow back into the second blind hole; the supporting plate and the hemispherical block can freely rotate on the groove, so that the supporting plate can be attached to the box girder under the condition that the lower end face of the box girder is uneven or low in levelness, the contact area between the supporting plate and the box girder is increased, and the jacking effect of the jack is more stable.

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 relates to the technical field of bridge jacking construction, in particular to a large-area special-shaped continuous beam asynchronous jacking system and a jacking construction method. According to the method, jacking force is pre-distributed based on a finite element model and a historical data training machine learning algorithm, and high-precision deformation coordination control is achieved through a hydraulic jack group and a multi-sensor cooperative monitoring network (including displacement, strain, inclination angle and deflection parameters) placed on a special-shaped beam in combination with an iteratively optimized graded jacking and dynamic compensation strategy. Comprising the steps that the total jacking height is constructed in a graded mode, and in each stage of jacking, output of all fulcrums is adjusted in real time through a PLC so that the displacement synchronization error can be kept to be smaller than or equal to 0.5 mm; when it is monitored that local stress exceeds the limit, a dynamic compensation mechanism is triggered, and secondary balance of the load is achieved by jacking and accelerating an overstress point and jacking adjacent fulcrums in a reinforcement mode. According to the method, the problems of stress concentration, local support disengaging and the like caused by uneven stress in the jacking process of the special-shaped continuous beam are solved.

The utility model provides an optimized detection device for the drawing force of a pipe seam anchor rod, and belongs to the field of pipe seam anchor rod drawing force detection. Comprising a hollow pipe seam anchor rod body, a stress clamping groove lantern ring arranged on the hollow pipe seam anchor rod body in a sleeving mode, a counter-force cone clamped into the stress clamping groove lantern ring, threaded steel bars screwed into the counter-force cone and the hollow pipe seam anchor rod body and a counter-force cylinder arranged on the periphery of the counter-force cone. A hydraulic jack and a pressure sensor are sequentially arranged above the counter-force cylinder; a pipe seam anchor rod gasket and an improved gasket are sequentially arranged below the counter-force cylinder; a cylindrical protrusion is arranged at the bottom of the improved gasket, and a groove is formed in the center of the improved gasket. The influence of the external environment on the hollow pipe seam anchor rod pull-out test is reduced by building the platform, and the stability and repeatability of the test are improved; by improving the design of the cylindrical protrusion and the groove of the gasket, the pull-out test force transmission structure is effectively attached to the uneven rock wall, and meanwhile the exposed end of the test anchor rod can be effectively protected through the device.

The invention discloses a three-degree-of-freedom adjusting mechanism for finely adjusting the normal direction of a reflecting mirror. The three-degree-of-freedom adjusting mechanism comprises a mirror frame, a translation table, a pitching table, a rotating table, a base and a translation table top seat, wherein the rotating table is rotatably mounted on the base; a rotating table is arranged on the base, a rotating protruding block is arranged on one side of the rotating table, two protruding bases are further arranged on the base, the rotating protruding block is located between the two protruding bases, rotating jackscrews are transversely arranged on the protruding bases in a threaded and penetrating mode, and the two rotating jackscrews abut against the two sides of the rotating protruding block respectively. The pitching table can be installed on the rotating table in an up-down overturning mode, a pitching jackscrew is further arranged on the pitching table in a threaded and penetrating mode, and the lower end of the pitching jackscrew abuts against the rotating table; the translation table is installed on the pitching table, the mirror frame is transversely arranged on the translation table in a sliding mode, a translation jackscrew penetrates through the translation table in a threaded mode, and one end of the translation jackscrew abuts against the mirror frame. According to the invention, the rotation angle and the pitching angle of the mirror surface of the reflector and the translation adjustment along the normal direction of the mirror surface can be completed.

The invention relates to the technical field of steel structure supporting, and discloses a self-leveling universal support for large-span steel structure temporary supporting and a construction method thereof.The self-leveling universal support comprises a mounting base, a shockproof and antiskid mechanism, a reinforcing lifting mechanism, a fixing mechanism and a stable placement mechanism, and a self-leveling supporting mechanism is arranged on the mounting base. According to the self-leveling universal support for temporary supporting of the large-span steel structure and the construction method of the self-leveling universal support, through the arrangement of the self-leveling supporting mechanism, a first electric push rod can be controlled to stretch out and draw back in a first mounting groove according to the actual state of the steel structure, meanwhile, a supporting plate can freely rotate and slightly move in the horizontal direction through a spherical hinge connecting structure of a ball head and a ball socket, and the self-leveling supporting mechanism is arranged; the jackscrew can be screwed into the connecting block to abut against the surface of the ball head during installation and debugging, the ball head is fixed and limited to a certain degree, the supporting requirements under different working conditions are met, in this way, the situation that additional stress is generated due to the fact that the interior of the structure cannot adapt to deformation is avoided, and installation precision and safety are improved.

The invention relates to the field of bridge construction, in particular to a turning and jacking integrated construction method and system for a T-shaped structure bridge without a closure segment, and the method comprises the following steps: S1, carrying out T-shaped structure construction in a full framing construction mode; s2, side pier construction is carried out, and jacking bracket devices are pre-buried on side piers; s3, adopting an intelligent swivel system, and monitoring the swivel operation of the T-structure bridge through a measurement monitoring system; s4, temporary buttresses are arranged on the side piers, and synchronous jacking of the main beam is conducted through a micro jack group; s5, after the main beam is jacked to reach the designed elevation, a support is installed, and then the beam is dropped; and S6, the temporary supporting system and construction auxiliary facilities are dismantled, and system conversion is completed. The construction period can be shortened, the construction quality is improved, the construction safety is enhanced, and the construction cost is reduced.

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 utility model discloses a steel-concrete box girder assembly jig frame, which relates to the technical field of steel-concrete box girder assembly and is characterized in that the top of a support frame is connected with a plurality of groups of limiting frames in a sliding manner, a plurality of groups of jacks are respectively positioned on the periphery of the support frame, the top ends of the jacks are fixedly connected with guide rods, and the top ends of the guide rods are fixedly connected with the support frame; the multiple sets of supporting columns are fixedly connected with the bottom end of the jack. The jack drives the guide rod to vertically move upwards so as to abut against the supporting frame to move to the position with the appropriate elevation of the steel-concrete box girders, and when the two steel-concrete box girders are placed on the supporting frame, the phenomenon that the height of the supporting frame is reduced due to the fact that the height of a ship is reduced is avoided; therefore, it is guaranteed that the reinforced concrete box girder is located at the designed elevation position when placed on the supporting frame, then the assembling accuracy of the reinforced concrete box girder is guaranteed, the periphery of the supporting frame can be adjusted through the four sets of jacks, and therefore the supporting frame is located at the horizontal position.

The invention relates to the technical field of diode detection, and particularly discloses a silicon carbide diode detection device which comprises a box body, a support, an input shaft, a power assembly and a first gear, the support is arranged on the left side of the top end of the box body, and the bottom end of the input shaft is rotatably arranged in the middle of the bottom end of an inner cavity of the box body through a bearing; the power assembly is arranged on the left side of the bottom end of the inner cavity of the box body and used for providing rotation power for the input shaft, and the first gear is connected to the bottom end of the outer wall of the input shaft in a sleeving mode and locked through a jackscrew. The device fills the blank in the aspects of packaging level thermal mechanical reliability acceleration test and service life prediction of the silicon carbide diode in the prior art, and has the remarkable advantages of short test period, real simulated working condition, comprehensive evaluation dimension, safe and reliable operation and the like; and a powerful tool is provided for product research and development, quality control and reliability evaluation of the silicon carbide diode.

A wheel assembly for use with a trailer jack includes an outer shell defining a main volume. The wheel assembly may further include a main ball configured to be at least partially contained within the main volume of the outer shell and to contact a ground surface. The wheel assembly may further include a bearing coupled between the main ball and the outer shell and configured to allow motion of the main ball relative to the outer shell. The wheel assembly may further include a coupler configured to couple the outer shell to a shaft of a trailer jack. The wheel assembly may further include a lock configured to retain the main ball in place relative to the outer shell.

This is a driving system for a hanging cage assembly platform in a truss track running. [Solution] This is a suspension cage assembly platform drive system fixed to a guide rail and truss. Front and rear mounts, each equipped with a jack and its support legs, are installed on the guide rail. A horizontal slide rail with a slider attached to it, on which a slide sheet slides vertically, is located within the front mount. Furthermore, a lifting member is attached to the jack's telescopic rod, and the lifting member and slide sheet are connected by an elastic telescopic rod. The slide sheet is positioned vertically between the slide sheet and the front mount, and is released from its position by horizontal movement of the slide sheet. Furthermore, rollers are installed below the slide sheet, and a damping positioning mechanism is installed that allows the slide sheet to pass only in one direction when it reaches the bottom of the slider along its sliding trajectory, thereby achieving full automation.

The utility model belongs to the technical field of foundation engineering structural members, and discloses a detachable device for providing pressing counter-force for a sinking structure, which comprises a counter-force anchor cable, the outer surface of the counter-force anchor cable is fixedly connected with a detachable steel corbel, one end of the detachable steel corbel is provided with a corbel pre-embedded component, and the other end of the detachable steel corbel is provided with a steel corbel pre-embedded component. The detachable steel corbel is fixedly connected with a quasi-sinking structure through a corbel pre-buried assembly, the corbel pre-buried assembly is composed of a plurality of pre-buried high-strength bolts and a pre-buried steel plate and is pre-buried in the structure, the detachable steel corbel is composed of a top steel plate, a back steel plate and two steel rib plates, the top end of the top steel plate is provided with a through type reserved anchor cable hole, and the top end of the back steel plate is provided with a through type reserved anchor cable hole. A plurality of reserved bolt holes are formed in the back steel plate, the reserved bolt holes completely correspond to the exposed positions of the embedded high-strength bolts, the center hole jack is arranged, upward anchor cable drawing is converted into downward pressure on the structure through the detachable steel corbel, and construction efficiency is effectively improved.

The invention discloses a collecting funnel wear-resistant lining type automatic deviation rectifying and distributing device, belongs to the technical field of mine and mineral processing production, and solves the problems of unbalance loading and deviation caused by deviation of a discharging point in multi-conveying-belt transportation and high maintenance cost of a wear-resistant lining plate. The device comprises a main body supporting and driving system (an integrated bracket, an air cylinder, a bracket and a jackscrew), a deviation monitoring and control system (a deviation sensor, a PLC (Programmable Logic Controller) control box and an electromagnetic valve) and a wear-resistant buffering system (a wear-resistant rubber buffering curtain), the deviation of the conveying belt is monitored in real time through the deviation sensor, the PLC control box drives the air cylinder to drive the support to move transversely, the angle of the buffer curtain is adjusted in combination with the jackscrew, a'monitoring-feedback-adjusting 'closed loop is formed, and dynamic deviation correction of a discharging point is achieved. The buffering curtain replaces a traditional metal lining plate, abrasion is reduced, and replacement is convenient. The device improves the stability of a transportation system, reduces the maintenance cost and adapts to severe working conditions of mines.

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.