765 results about "Kinetic friction" patented technology

The invention relates to the technical field of steel box girder welding, and particularly discloses a steel box girder welding device and method.The steel box girder welding device comprises a platform, a movable frame body and a welding mechanism, the movable frame body is provided with a bearing frame, and the bearing frame is provided with a rolling assembly and a first driving assembly for driving the rolling assembly to abut against the top face of a U-shaped rib of a steel box girder; the bearing frame is provided with two symmetrically-distributed clamping assemblies and a second driving assembly for driving the clamping assemblies to abut against the two side faces of the U-shaped rib, each clamping assembly comprises a mounting frame and a clamping plate connected to the mounting frame, a crawler belt is arranged on the periphery of each clamping plate, and the mounting frame is provided with a third driving assembly for driving the crawler belt to rotate; the third driving assembly drives the crawler belt to rotate to be matched with the moving speed of the moving frame body, so that sliding friction does not occur between the crawler belt and the U-shaped rib. According to the steel box girder welding device and the welding method, the abrasion of the U-shaped rib caused by sliding friction is avoided, and the stability of the moving process of the movable frame body and the continuous proceeding of the welding operation are ensured.

A method of additive manufacturing a part having integrated passages is provided. In one aspect, the method includes forming a part having a near net shape by moving a friction stir tool to deposit a filler material in a predetermined formation. The tool can include a rotating spindle having a channel configured to hold the filler material. The method can include machining the near net shape part to form a plurality of grooves extending into a surface of the part, the plurality of grooves sized and shaped to each receive a tube. The method can include placing a tube into each of the plurality of grooves and moving the tool across the surface of the part and depositing additional material configured to secure the tubes within the plurality of grooves. The method can include machining the additional material deposited over the tubes to a predetermined shape.

The invention relates to the technical field of friction coefficient measuring devices, and discloses a device for testing the friction coefficient of an anti-skid coating of a cultivation work ship deck. Comprising a testing platform, a friction coefficient testing mechanism arranged below the testing platform, a driving mechanism arranged on the testing platform and used for driving the friction coefficient testing mechanism to horizontally move, and a partition assembly and a water spraying assembly arranged in the middle of the lower surface of the testing platform; through the arrangement of the high-pressure nozzles, in the moving process of the testing platform, high-pressure gas can automatically clean a deck testing area through the high-pressure nozzles, dust attached to the surface of a deck is effectively removed, manual pre-cleaning is not needed, the testing efficiency is remarkably improved, meanwhile, seawater is sprayed to the designated testing area through the water spraying assembly, and the testing efficiency is improved. The environment of the residual seawater on the deck in the actual operation of the cultivation work ship is accurately simulated, and the technical problems that an existing portable sliding friction instrument needs to be manually cleaned and cannot simulate the residual seawater environment are solved.

The utility model discloses a recoverable swing column for shock resistance, relates to the technical field of shock resistance of constructional engineering, and adopts the technical scheme that the recoverable swing column comprises a stand column, two energy consumption dampers and a rotatable column foot, each energy consumption damper comprises a clamping plate, a bottom connecting piece, a top connecting piece, an SMA energy consumption metal rod, a friction plate and a fastener, the energy dissipation damper is connected with the stand column through the top connecting piece, one end of the clamping plate is connected with the top connecting piece through a fastener, the other end of the clamping plate is connected with the bottom connecting piece through a fastener, and the number of the friction plates is two. Rotation constraint of a connecting interface of the main body structure and the foundation slab is relaxed through the energy dissipation dampers and the rotatable column feet, so that the structure rotates and rubs in a limited mode to dissipate earthquake energy, the energy dissipation dampers generate up-down sliding friction to dissipate the earthquake energy, and damage and residual deformation of the main body structure are reduced.

The invention relates to the technical field related to conveying belts, in particular to a material conveying structure for a conveying belt detection machine table, which comprises a baffle plate, and a material blocking mechanism is arranged on the upper surface of the baffle plate. According to the material conveying structure for the conveying belt detection machine table, through the arrangement of the material blocking mechanism, when the material conveying structure is used, a rotating cylinder in the material blocking mechanism can rotate when making contact with materials, sliding friction between the materials and a check block is converted into rolling friction, the influence of friction force on the materials is greatly reduced, and the integrity of the materials is effectively protected; the speed of materials moving towards the material receiving box can be increased through rotation of the rotating cylinder, the materials are prevented from being detained and accumulated at the blocking position, the materials can quickly and smoothly pass through the material blocking area, continuity and smoothness of the whole material conveying process are guaranteed, the position of the material blocking mechanism can be flexibly adjusted according to the height of the materials, unqualified objects are accurately blocked, and production efficiency is improved. And the material detection accuracy and the separation efficiency are effectively improved.

The utility model discloses a ball mill lining plate for preparing superfine powder, which comprises a lining plate bottom plate, the top surface of the lining plate bottom plate is a grinding working surface, the lining plate bottom plate is provided with at least two grinding working surfaces, each grinding working surface is an involute arc-shaped curved surface, each grinding working surface is provided with a grinding medium lifting flow guide strip, and the grinding medium lifting flow guide strips are arranged on the lining plate bottom plate. Reinforcing ribs are embedded in the lining plate bottom plate, and positioning through grooves and positioning strips are arranged on the two side faces, arranged in the axial direction of the ball mill, of the lining plate bottom plate correspondingly. Materials on the grinding working face make full contact with grinding media, grinding is carried out by making full use of sliding friction between the grinding media and the grinding working face, the grinding media lift the flow guide strips to promote self-circulation of the grinding media and the materials, the contact face with the grinding media is changed into line contact from point contact, the grinding area is increased, and the grinding efficiency is improved. And a positioning strip, a positioning through groove, a positioning pin and a positioning circular groove are arranged, so that the lining plate bottom can be quickly and accurately positioned and spliced.

The invention relates to the field of low-temperature liquid conveying equipment, and discloses a rotor supporting system of a low-temperature liquid pump, which is arranged on a pump rotating shaft and is used for supporting a rotor. The system includes a fixed bearing bushing, a swivel bearing bushing, and a flexible coupling bushing ring. The fixed bearing bushing is fixedly mounted in a bearing supporting seat of the pump body; the rotating bearing bush is arranged on the pump rotating shaft in a sleeving mode, and a sliding friction pair is formed between the rotating bearing bush and the fixed bearing bush. And the flexible connecting bushing ring is arranged between the rotary bearing bushing and the pump rotating shaft and is in interference fit with the rotary bearing bushing and the pump rotating shaft respectively. Through the flexible connection bushing ring, the thermal deformation difference of materials in a low-temperature environment can be absorbed, starting impact and operation friction damage are reduced, and therefore stable supporting and long-term reliable operation of the low-temperature liquid pump rotor are achieved.

The invention relates to the technical field of stress detection equipment, and discloses building steel structural member stress detection equipment which comprises a base, an adjusting ring is fixedly arranged on the base, and a first detection piece for detecting stress at the two ends of a steel structural member is arranged on the adjusting ring; the adjusting ring is provided with a second inspection part for detecting the stress of the middle section of the steel structural part, and the adjusting ring is provided with a pushing part for enabling the steel structural part to move; the J-shaped connecting groove is matched with the pulley, non-impact conversion from horizontal movement to vertical movement is achieved, jumping generated during lifting of the placing piece is avoided, the size design of the avoiding groove provides an independent movement space for the first sensor, the movement interference risk is thoroughly eliminated, sliding friction is converted into rolling friction through bearing matching of the pulley and the rotating shaft, and the stability of the sensor is improved. And through the symmetrical layout of the connecting grooves, the stress on the two sides of the placing piece is balanced, side inclination during lifting is avoided, and it is ensured that the posture of the steel structural piece is stable.

The invention relates to the technical field of road and bridge construction, and particularly discloses road and bridge construction steel bar connecting equipment convenient to position, collecting parts are fixedly connected to the two sides of the middle of a main body, and a welding part is fixedly connected to the side, away from the collecting parts, of the middle of the main body. According to the road and bridge construction reinforcing steel bar connecting equipment convenient to position, the rotating wheels are arranged on the inner side of the feeding cylinder in a surrounding mode, and after reinforcing steel bars enter the feeding cylinder, the rotating wheels make multi-point contact with the surfaces of the reinforcing steel bars. The rotating wheels are uniformly distributed, not only convert sliding friction into rolling friction, but also play a role in auxiliary positioning. Due to the fact that the positions of the rotating wheels are relatively fixed, the reinforcing steel bars are jointly supported and guided by the rotating wheels in the moving process, and the position deviation of the reinforcing steel bars in the feeding cylinder is further limited. When the reinforcing steel bar moves forwards, if tiny radial deviation occurs, the rotating wheel can push the reinforcing steel bar back to the position relative to the center through contact force, and the reinforcing steel bar is always kept to move forwards stably in the axis direction of the feeding cylinder.

The invention discloses wear resistance detection equipment for carpet production and a detection method, and particularly relates to the field of carpet detection.The detection equipment comprises a machine body, a supporting seat is fixedly arranged in the machine body, the supporting seat is used for placing a carpet to be detected, and a fixing mechanism is further arranged in the machine body and used for fixing the carpet to be detected on the supporting seat; a grinding detection mechanism is arranged in the machine body, the grinding detection mechanism comprises a friction head capable of performing vertical linear motion and transverse reciprocating motion, and the grinding detection mechanism performs wear resistance detection by driving the friction head to perform transverse reciprocating motion on the upper surface of the carpet to be detected. The multi-point supporting assembly is arranged to disperse pressure, limit tensile strain, reduce vertical compression and provide additional support for the carpet to be detected, deformation of a surface layer material of the carpet to be detected when the surface layer material moves along with the friction head can be effectively reduced, and therefore the actual movement distance of the friction head can be closer to the theoretical movement distance; and the wear resistance detection precision is improved.

The invention discloses a detachable soft gasket and method for thin plate grinding deformation control. The soft gasket structurally comprises a friction adsorption enhancement layer, a micropore vibration reduction layer and an elastic supporting layer which are detachably connected in sequence from top to bottom. In the soft gasket, the elastic supporting layer provides flexible buffering, the micropore vibration reduction layer absorbs machining vibration through a closed-cell micropore structure, the friction adsorption enhancement layer enhances the adsorption force and stability through non-uniform waveform raised grains and conical grooves, the bottom of the friction adsorption enhancement layer is designed in a sealed mode, grinding fluid permeation is effectively prevented, and all the layers cooperate with one another to improve the machining precision. The soft gasket is designed to be of a multi-layer structure, machining deformation is effectively reduced by providing a positioning reference, and the problems of initial deformation, end face jumping and planeness out-of-tolerance of the thin plate caused by a traditional rigid fixing or adsorption mode can be remarkably solved.

The invention relates to a sawing and milling machining unit, a machining center and a working method suitable for curtain wall profiles, a milling machining mechanism is used for achieving sawing machining or milling machining, a sawing and milling clamp is used for clamping and fixing the profiles in the vertical direction and the horizontal direction, and a pressing block of the sawing and milling clamp is driven by an air cylinder to clamp the profiles in the vertical direction and the horizontal direction. The vertical pressing mechanism moves towards the fixed roller in the vertical direction to vertically press the profile to be machined; the cross section of each fixed roller is semicircular, a plurality of groups of air holes which are arranged in parallel are formed in the semicircular area, the connecting line of the plurality of groups of air holes is positioned on one side of the axis of the fixed roller, and the connecting line of the air holes in two adjacent groups of fixed rollers forms an angle alpha of 100-120 degrees in the cross section direction of the fixed roller. In the section feeding and processing period, air is sprayed out through the fixed roller, an air cushion is formed on the bottom face of the section, the pressure of the dead weight of the section on the surface of the fixed roller is reduced, meanwhile, aluminum skimmings on the bottom face of the section are blown away, and the scratch problem caused by sliding friction between the section and the fixed roller is solved.

The invention relates to the technical field of robot welding guns, in particular to a robot welding gun neck capable of reducing wire feeding resistance. The robot welding gun neck comprises an outer pipe and an inner pipe, the inner pipe is a special-shaped pipe, a wire feeding channel extending in the axial direction of the inner pipe is arranged on the upper portion of the inner pipe, and a notch is formed in the bottom side of the wire feeding channel; a set of idler wheels are arranged in the wire feeding channel, and welding wires can penetrate through cavities between the idler wheels and the notches. The structural form of the inner pipe and the outer pipe is adopted, the special grooves are designed in the inner pipe to serve as wire feeding channels, the roller sets are placed in the grooves, sliding friction with large resistance in the wire feeding process is changed into rolling friction with low resistance through the roller sets, and therefore the wire feeding stability is improved.

A cleaning apparatus, method, program product, medium and cleaning system, the cleaning apparatus including a cleaning member providing a forward force to the cleaning apparatus during forward movement of the cleaning apparatus and cleaning of a surface to be cleaned, and an assist member providing a forward force to the cleaning apparatus during forward movement of the cleaning apparatus and cleaning of the surface to be cleaned. And the power assisting piece provides backward speed reducing force for the cleaning equipment. In this way, in the process that the cleaning equipment moves forwards depending on the rolling friction force of the cleaning piece, the power assisting piece can be used for providing backward speed reducing force for the cleaning equipment to consume part of the rolling friction force, then the probability that a user is dragged forwards by the cleaning equipment in the process of using the cleaning equipment is reduced, user experience is improved, and user experience is improved. And meanwhile, the cleaning equipment is prevented from moving forwards too fast, and the use safety of a user is guaranteed.

The utility model discloses a shifting fork surface deburring device, which relates to the technical field of shifting fork production and comprises a workbench and a mounting rack, a first fixing die and a second fixing die are respectively and fixedly arranged at one ends of two sliding shafts, sleeve shafts are arranged at the other ends of the sliding shafts in a sliding manner, linkage plates are rotatably arranged on the sliding shafts, and the linkage plates are fixedly arranged on the workbench. The two-way screw is driven by the transmission shaft to rotate, so that the shifting fork is quickly clamped and fixed, the friction plate is driven to move when the mounting frame moves, the friction plate is driven to move when the friction plate moves, and the shifting fork can be quickly cleaned. The friction plate and the friction wheel are in friction to enable the friction wheel to rotate, the friction wheel is matched with the stop plate through the ratchet, the pawl and the ratchet to enable the worm to rotate in one direction, and therefore the uncleaned face of the shifting fork can be switched conveniently, and the other two faces of the shifting fork can be cleaned.

The utility model relates to the technical field of bridge construction, and discloses a reinforcement cage hanging bracket positioning device for bridge construction, which comprises a hanging bracket, grooves are arranged on four sides of an inner cavity of the hanging bracket, the hanging bracket is movably sleeved with pull rods through the four grooves respectively, one end of each pull rod is fixedly provided with a clamping plate, and the other end of each pull rod is fixedly provided with a clamping plate. The four clamping plates are all located in the hanging bracket. According to the reinforcement cage hanging bracket positioning device for bridge construction, clamping plates are fixed to one ends of four supporting rods, pull rods are fixed to one ends of the four clamping plates, grooves are formed in the four edges of an inner cavity of a hanging bracket, the four pull rods are movably connected with the hanging bracket in a clamped mode through the four grooves correspondingly, and mounting rods are fixed to inner cavities of the grooves at equal intervals; and the rollers are movably mounted on the outer sides of the mounting rods, so that when the pull rods on the periphery are pulled, the previous sliding friction force is replaced by the received rolling friction force, and the effect of conveniently pushing the supporting rods is achieved.

The invention relates to the technical field of belt conveyor rollers, in particular to a transmission roller structure and a belt conveyor thereof, the transmission roller structure comprises a rack, and the rack is connected with a roller body; the driving assembly is used for driving the roller main body to rotate; the friction assembly is used for enhancing the friction force between the belt and the roller; the tensioning force self-adjusting assembly comprises an inertia energy storage mechanism, a vibration energy storage mechanism, a storage mechanism and an adjusting mechanism; and the cleaning assembly is used for cleaning the friction assembly by using the air in the storage mechanism. Inertial energy and vibration energy of roller movement are converted into compressed air to be stored through the inertial energy storage mechanism and the vibration energy storage mechanism, the friction assembly is dynamically adjusted in combination with the adjusting mechanism, self-adaptive adjustment of friction force is achieved, belt slipping is effectively avoided, and the conveying reliability is improved.

The invention relates to the technical field of welding, in particular to a metal rod welding device for fitness equipment production, which comprises a workbench, a clamping assembly mounted on the workbench and used for clamping a weight piece, and a fixing assembly mounted on the workbench and used for fixing the weight piece, and the clamping assembly can move relative to the workbench. The fixing device is used for fixing the barbell rod; according to the metal rod welding device for fitness equipment production, the supporting frame is arranged between the clamping assembly and the fixing assembly, meanwhile, the polishing assembly is arranged on the supporting frame, and therefore when a weight piece and a metal barbell rod are welded, one end of the metal barbell rod can be polished in advance; according to the barbell rod friction welding device, the effect that the welding position of the barbell rod and the weight piece can be guaranteed to be flat before friction welding is conducted on the barbell rod is guaranteed, enough pressure can be applied when the weight piece conducts rotating friction welding along one end of the barbell rod, and therefore the barbell welding strength is guaranteed, and the defect of local welding cracks is overcome.

The invention provides a plate tension-compression buckling-restrained clamping device and a working method, relates to the field of tension-compression tests, and aims to solve the problem that data errors are easy to introduce by adopting a buckling-restrained structure during compression of a plate in a tension-compression cycle test. The elastic piece acts on the lower clamping plate through elastic force, so that the working area continuously restrains the parallel section of the sample, buckling instability of the parallel section in the thickness direction during compression is prevented, it is guaranteed that deformation is in-plane deformation all the time, the sample slides relative to the working area during tension and compression circulation, and sliding friction force can be reduced through the antifriction layer at the contact position of the lower clamping plate. The constraint force transmitted by the elastic piece is measured by the force sensor in real time, and the data can reflect the constraint strength and potential friction influence, so that subsequent correction of compression deformation data is facilitated, and errors are reduced.

The invention relates to the technical field of structural engineering, in particular to a stable friction damper with segmented positive and negative stiffness characteristics and a modeling method of the friction damper. The friction damper comprises supports, and a pre-compression spring assembly, a lever assembly, a viscoelastic damper assembly and a rotating friction assembly which are arranged between the supports; the pre-compression spring assembly is used for achieving the negative stiffness effect, the lever assembly plays a role in increasing the force and the negative stiffness effect, and the pre-compression spring assembly and the lever assembly form a stable triangular deformation structure. The rotating friction assembly is used for providing friction damping force and guaranteeing the stability of the structure when the pre-compression spring assembly and the lever assembly rotate relatively. The viscoelastic damper assembly is used for applying vibration reduction control force to the structure when small-amplitude vibration of the structure is not enough to drive the friction surface to slide. The invention further provides a corresponding modeling analysis method, and the dynamic behaviors of the device in different working stages are accurately described.

The present application relates to the technical field of energy storage products, and in particular to an installation support assembly and an energy storage device. The installation support assembly includes a first support member, a second support member and a product. The product is formed with a matching portion, and the matching portion is formed with intersecting matching horizontal surfaces and matching inclined surfaces; the second support member is arranged on the first support member, and it is formed with intersecting horizontal support surfaces and inclined support surfaces; the matching horizontal surface is formed with a first avoidance missing portion, and the matching inclined surface is provided with a first roller and can roll along the inclined support surface; the inclined support surface is provided with a second avoidance missing portion, and the horizontal support surface is provided with a second roller and can roll along the matching horizontal surface; along the pushing direction, the first roller and the first avoidance missing portion are located at both ends, and the second roller and the second avoidance missing portion are located at both ends. By designing the rollers, the sliding friction of the battery pack pushed in is converted into rolling friction, which saves time and effort, and after being in place, the rollers can be separated from their respective tracks to avoid sliding.

The roller type linear guide rail comprises a rail, a sliding block and the cylindrical roller, the sliding block slides in the length direction of the rail, a rail rolling channel is formed in the rail, a sliding block rolling channel is formed in the sliding block, and the roller comprises a roller rolling face, a first roller end face and a second roller end face. The rolling surfaces of the rollers correspond to the rail rolling channels and the sliding block rolling channels respectively, and are in contact fit with the rail rolling channels and the sliding block rolling channels respectively to bear external loads of the linear guide rail; the sliding block is further provided with a flange, the flange corresponds to the first roller end face of the roller, and the first roller end face makes contact with the flange so as to guide running of the roller and prevent the roller from inclining. And the flanges are in linear contact with the end surfaces of the first rollers. According to the linear guide rail, the rollers can be stably kept not to incline, meanwhile, the contact area between the end faces of the rollers and the flanges is effectively reduced, sliding friction is reduced, and therefore the operation performance is improved.

The invention discloses a hot die forging press with a pneumatic friction clutch, which relates to the technical field of hot die forging presses and comprises a machine body, the pneumatic friction clutch, a lower template, an upper template, a lower die, an upper die, a moving mechanism and a spraying mechanism. By arranging the moving mechanism and the spraying mechanism, formed materials can be automatically taken out conveniently, unprocessed materials can be automatically placed into an inner cavity of the lower mold, the material taking and placing process is automatic, a worker does not need to intervene between the upper mold and the lower mold of the equipment for dangerous operation, and production safety is guaranteed while the working efficiency is improved; and in the automatic material taking process, a release agent in a liquid inlet pipe is conveyed into a displacement plate and sprayed out through a spray head, the release agent is automatically sprayed to the lower mold and the upper mold, and the design is convenient for automatically spraying the release agent to the lower mold and the upper mold.

The invention relates to the technical field of steel plate flaw detection, and discloses a steel plate transverse-cutting flaw detection device and a using method thereof.The steel plate transverse-cutting flaw detection device comprises a main body, a motor is fixedly connected to the front face of the main body, a plurality of rotating rollers are rotatably connected to the interior of the main body, and the outer surfaces of the rotating rollers are sleeved with two connecting belts; and the output end of the motor penetrates into the main body and is fixedly connected with one of the rotating rollers. The rotation of the roller can change sliding friction during detection into rolling friction, so that the friction force between the flaw detection sensor and a steel plate during sliding can be reduced, and the situation that the surface of the steel plate is too rough and the friction force is relatively large during sliding detection is reduced; the ultrasonic energy emitted by the flaw detection sensor is difficult to be effectively transmitted into the steel plate due to the fact that the flaw detection sensor is scratched during sliding or the coupling effect between the flaw detection sensor and the steel plate becomes poor during sliding detection, so that the detection accuracy of the device can be improved.

The invention provides a preparation and application method of a solid super-lubricating two-dimensional material, the two-dimensional material is prepared through a one-dimensional amorphous crystal self-stripping layer, the preparation process is very simple and environment-friendly, water can be used as a solvent, low-cost large-scale preparation is easy to realize, and the solid super-lubricating two-dimensional material has very high quality and monolayer property. The two-dimensional material has extremely weak interlayer acting force, shows excellent solid super-lubrication performance, and can realize the super-lubrication behavior that the friction coefficient of a sliding part is lower than 0.01 in an atmospheric environment, and the interlayer adhesive force is 40-80% of that of graphite. The friction wear of the sliding part can be greatly reduced, and the friction material is suitable for various sliding friction parts, such as bearings, sliding blocks and micro-electro-mechanical systems.

The utility model provides a quick-release inclined hoisting device for a foundation pit engineering supporting pipe. Comprising an inclined hoisting body, a fixing assembly used for fixing the foundation pit engineering supporting pipe is arranged on one side of the inclined hoisting body, the distance between two fixing plates can be adjusted by rotating a first threaded rod, and a second threaded rod, a friction block, a limiting rod and a limiting plate are arranged; a second threaded rod is rotated, and a friction block is pushed to move in the direction of the foundation pit engineering supporting pipe through rotation of the second threaded rod, so that the foundation pit engineering supporting pipe is fixed through the two fixing plates, and the foundation pit engineering supporting pipe is further fixed through movement of the second threaded rod and the friction block; and a plurality of grooves are formed in the surface of the friction block, other objects can be better grasped through the rough surface, the friction force is increased, and the fastening effect on the foundation pit engineering supporting pipe is improved.

The utility model aims to provide a novel water cup holder with a 2K clamping jaw matched with a rubber spring for noise reduction. The novel water cup holder is used for solving the problems that an original center control water cup holder is large in noise and poor in stability, and vibration noise generated by vibration friction between the clamping jaw in the water cup holder and a cup stand movement area needs subsequent oil coating treatment. The highlight upper cover plate is connected with the water cup bracket through welding; the 2K clamping jaw is connected with the water cup bracket 4 in a clamping mode, meanwhile, the 2K clamping jaw can rotate around a shaft A on the 2K clamping jaw, and the rubber spring is connected with the 2K clamping jaw in a clamping mode and is clamped in the water cup bracket at the same time. The 2K clamping jaw has the advantages that the 2K clamping jaw has a buffering function, vibration noise generated when a cup and other used articles are fixed can be effectively reduced, and the soft material can guarantee better friction force to achieve the function of stabilizing the articles.

The invention discloses a construction method for a pull-out resistant prefabricated hollow pipe pile and foundation connection structure, comprising: a prefabricated hollow pipe pile (3) pre-buried under the foundation, a pull-out resistant rod (501); a steel bar stripping device, comprising: a base (1) placed above the ground, a stripping unit (230); a pipe pile self-rotation drive unit (4), comprising a self-rotation drive motor (406), a second self-rotation drive gear (405), a first self-rotation drive gear (404), and a rolling friction wheel (401). By proposing an auxiliary construction device that can perform steel bar stripping on the prefabricated hollow pipe pile in advance, the connection difficulty after the threaded section is completely cut off is further solved. During construction, the construction personnel only need to perform plane sawing on the prefabricated hollow pipe pile according to the construction length requirements, and then put the pipe pile into the steel bar stripping device to strip out the steel bar section in the end concrete separately.

The utility model relates to the technical field of mold guide pillars, in particular to a square guide pillar structure of a mold, which comprises a guide pillar body, a locking mechanism and a connecting mechanism, the center of the surface of the bottom end of the guide pillar body is provided with a first thread groove, and the locking mechanism is provided with a second thread groove. A locking mechanism is installed on the surface of the bottom end of the guide column body and can rapidly assemble and splice the square guide column, so that the square guide column is more convenient to assemble, and a connecting mechanism is installed on the surface of the outer side of the guide column body and adopts a rolling connection mode of rollers. Relative movement between connecting parts is achieved through rolling of the wheels, rolling friction is relatively small, and abrasion and energy loss are easier to reduce compared with sliding friction. According to the utility model, the square guide pillar can be quickly assembled through the matching of the locking mechanism and the connecting mechanism, and more stable and more accurate movement can be provided.