264results about How to "Turn easily" patented technology

The invention discloses polylactic acid polyol as well as a preparation method and application thereof. The preparation method comprises the following steps: performing a heating reaction on zinc salt, organic ammonium salt and bis (ethylene carbonate) ether to prepare an in-situ catalyst; anions of the organic ammonium salt are selected from any one of bromide ions, chloride ions and iodide ions; and adding a lactide monomer, and carrying out polymerization reaction to obtain the polylactic acid polyol. The polylactic acid polyol prepared by the invention has a flexible chain segment, can provide better flexibility, and can be applied to preparation of a polyurethane material.

The invention discloses a shutter and a shutter handrail, and relates to the technical field of building decoration. The window frame extends in the first direction and is provided with a window opening penetrating in the second direction. The louver blade assembly is arranged in the window and comprises a plurality of louvers arranged in the first direction, and the two opposite ends of each louver are rotationally connected with the window frame; in the driving mechanism, a rotating driving part is used for driving a transmission shaft to rotate, the transmission shaft is arranged on one side of the louver blade assembly in the first direction and extends in the length direction of the louver blades, the two opposite ends of the transmission shaft are rotationally connected with the window frame, and at least one end of the transmission shaft and at least one end of each louver blade are coaxially provided with rotating parts. Each rotating piece is provided with two connecting ends symmetrical about the rotating axis of the rotating piece, transmission rods are arranged on the two opposite sides of the transmission shaft in the second direction, and each transmission rod extends in the first direction and is hinged to all the connecting ends located on the same side of the transmission shaft and the rotating piece. The transmission mechanism is good in rotation synchronism, good in sunshade and ventilation effect and low in transmission noise.

The invention provides a rotation adjusting assembly, a spotlight and a lighting system.The rotation adjusting assembly comprises a lamp body, a lamp holder assembly, an axis bolt, a damping piece and a guide bolt, the lamp body is provided with a cavity, a first connecting hole is formed in the wall of the lamp body, the lamp holder assembly is provided with a connecting arm, and the connecting arm is inserted into the cavity from the upper side of the lamp body; a second connecting hole matched with the first connecting hole is formed in the connecting arm, and the axis bolt is connected with the first connecting hole and the second connecting hole; an arc-shaped groove is further formed in the wall of the lamp body, the damping piece is installed at the arc-shaped groove, a third connecting hole is formed in the arc-shaped groove of the connecting arm, the guide bolt penetrates through the arc-shaped groove and then is connected with the third connecting hole, the head of the guide bolt makes contact with the damping piece, and the guide bolt can move in the arc-shaped groove around the axis bolt along with the connecting arm. The lighting system comprises the spotlight, the spotlight comprises the rotation adjusting assembly, and the rotation adjusting assembly can ensure that the lamp holder assembly can smoothly rotate relative to the lamp body and is stably located at the set lighting angle.

The utility model discloses a building foundation reinforcing pile, and relates to the technical field of building foundations. Comprising a fixing frame body, supporting plates are installed at the bottoms of the peripheral side walls of the fixing frame body, fixing cones are arranged at the left end and the right end of the lower surface of each supporting plate, rectangular blocks are installed at the upper ends of the peripheral side walls of the fixing frame body, connecting blocks are movably installed in the middles of the rectangular blocks, and first fixing bolts are installed on the right sides of the rectangular blocks; a first connecting rod is mounted at the bottom end of the connecting block, a screw rod is in threaded connection with the lower end in the first connecting rod, a second connecting rod is in threaded connection with the lower end of the circumferential surface of the screw rod, a supporting block is mounted at the bottom end of the second connecting rod, and a second fixing bolt penetrates through the middle of the right side of the supporting block; two fixing blocks are installed at the upper end and the lower end of the inner wall of the periphery of the fixing frame body respectively, T-shaped clamping grooves are formed in the middles of the inward sides of the fixing blocks, T-shaped clamping blocks are installed in the T-shaped clamping grooves, and reinforcing plates are installed at the ends, away from the T-shaped clamping grooves, of the T-shaped clamping blocks.

The invention discloses an adjustable thrombus breaking guide wire, and belongs to the technical field of interventional therapy instruments, the adjustable thrombus breaking guide wire comprises a guide wire, a thrombus breaking guide wire and a controller, and the position, close to the far end of the guide wire, of the guide wire is provided with a limiter; the thrombus breaking guide wire is slidably connected with the limiter, the far end of the thrombus breaking guide wire is connected with the far end of the guide wire, and the area between the far end of the guide wire and the limiter is a deformation area of the thrombus breaking guide wire; the controller is connected with the thrombus breaking guide wire, and the controller is used for recovering or releasing the thrombus breaking guide wire. The thrombus breaking guide wire is bent and deformed at the position close to the far end of the thrombus breaking guide wire to form a thrombus breaking structure for breaking thrombus, or the thrombus breaking guide wire is used for bending the guide wire so as to turn in a blood vessel, and a simpler structure, richer functions, lower cost and higher flexibility and bending resistance are achieved; the accuracy and the safety of the operation can be improved, and the treatment requirements of more complex diseases can be met.

The present invention discloses a wheel-track composite deformable chassis, comprising a frame, a power device and an actuator, each power device corresponds to an actuator, the actuator comprises a wheel-track conversion mechanism and a wheel body, the wheel-track conversion mechanism is used to convert the wheel body between a circle and a triangle, the power device comprises a moving power mechanism and a deforming power mechanism, wherein: the moving power mechanism comprises a travel motor and a travel gear set, the travel motor is connected to the actuator through a travel gear shaft; the deforming power mechanism comprises a deforming motor and a deforming gear set, the deforming motor is connected to the wheel-track conversion mechanism through a deforming gear set; a sealing protection device is provided between the power device and the actuator. The advantage is that the power device of the present invention ensures the stability of the wheel-track composite deformable chassis and ensures the safety of the wheel-track composite deformable chassis when traveling in a cluttered environment.

The invention belongs to the technical field of unmanned aerial vehicles, and mainly relates to an unmanned aerial vehicle fixing and resetting device for a nest and the unmanned aerial vehicle nest, the fixing and resetting device comprises a door plate and a parking apron, a fixing mechanism is arranged on the parking apron, and a first rotating arm and a second rotating arm are hinged to the two sides of the interior of the nest; mounting seats are hinged to the first rotating arm and the second rotating arm, the parking apron is fixedly arranged on the two mounting seats, a linear driving part is hinged to the interior of the nest, a connecting arm is hinged to the second rotating arm, the connecting arm is hinged to the door plate, and meanwhile the door plate blocks the opening of the nest and the entrance and exit of the parking apron. When the unmanned aerial vehicle needs to be released and the door plate is opened, the parking apron can go out of the nest along with the door plate at the same time, when the unmanned aerial vehicle needs to be withdrawn, the parking apron is reset into the nest, the door plate can also be reset along with the parking apron, and the opening of the nest is blocked, the two actions are conducted at the same time, and the withdrawing or releasing time of the unmanned aerial vehicle is shortened; and release or recovery of the unmanned aerial vehicle is accelerated.

The utility model relates to the technical field of foundation pit monitoring devices, and discloses a foundation pit structure monitoring device which comprises a mounting plate and a sensor, fixing plates are fixedly connected to the two ends of the side, away from the sensor, of the mounting plate, a clamping plate is fixedly connected to one side of one fixing plate, a threaded sleeve penetrates through the other fixing plate, and the clamping plate is fixedly connected to the other side of the mounting plate. The threaded sleeve is in threaded connection with the fixed plate, a sliding rod penetrates through the threaded sleeve, the sliding rod is in sliding connection with the threaded sleeve, and one end of the sliding rod is rotationally connected with a movable plate; according to the foundation pit structure monitoring device, a threaded sleeve is arranged on a fixing plate, a sliding rod is connected to the threaded sleeve in a sliding mode, a supporting column can be clamped by two clamping plates by sliding the sliding rod, then the threaded sleeve and the sliding rod are fixed through a limiting assembly, and the supporting column can be further clamped by the two clamping plates by rotating a handle; by means of the arrangement, the foundation pit support structure monitoring device has the advantages that a worker can monitor the foundation pit support structure more conveniently, and the stability is higher when the device is used.

The invention belongs to the technical field of environmental protection, and particularly relates to a direct-fired incinerator based on environmental protection, which comprises a transfer component, and a feeding component is arranged at the top of the transfer component; the top of the incinerator is provided with an adapter sleeve box; the exhaust component is arranged at the bottom of the transfer component and is used for exhausting internal dried water vapor; the transfer part comprises a container, and transfer cutting grooves are formed in the left side and the right side of an inner cavity of the container. According to the device, most of water in collected garbage can be removed through an air blowing plate, then the garbage is subjected to fine drying treatment through an upper dryer, and at the moment, the garbage can be flatly laid on the upper surface of a built-in transmission belt under the vibration effect of an internal vibration component; therefore, the problem that residual water in the stacked garbage cannot be dried is solved, the garbage subsequently thrown into the incinerator is ensured to be in a relatively dry state, and the problem that the garbage cannot be fully combusted due to water interference is avoided.

The utility model relates to a pair of glasses capable of adjusting a glasses frame and automatically positioning, which comprises the glasses frame, a frame edge and a nose pad, a cross beam is arranged in the middle of the frame edge, a mounting block is connected to the cross beam, one side of the mounting block is connected with the nose pad, a U-shaped limiting groove is formed in the other side of the mounting block, a pin shaft is arranged at an opening of the limiting groove, and the pin shaft is connected with the nose pad. A shaft sleeve is arranged on the pin shaft, the side wall of the shaft sleeve is connected with the glasses frame, the shaft sleeve can rotate relative to the pin shaft and can be positioned, when a user needs to adjust the distance between the glasses frame and the eyes, the user can rotate the glasses frame to drive the shaft sleeve so as to adjust the glasses frame to be turned upwards to be positioned and far away from the eyes, the glasses do not need to be removed, and great convenience is achieved. The adaptability is good, and the structure is simple.

The utility model discloses a high-strength combined bolt and nut knob device, which belongs to the technical field of knob devices and comprises a grab handle, a square plate is fixedly connected to the top of the grab handle, a first clamping plate is fixedly connected to one side of the square plate, a first groove is formed in the square plate, and a second groove is formed in the first clamping plate. A first groove is formed in the base, a first threaded rod is rotatably connected to the interior of the first groove in a penetrating mode, a second clamping plate is connected to the first threaded rod in a threaded mode, and a first rotary knob is fixedly connected to one end of the first threaded rod. The distance between a first clamping plate and a second clamping plate is adjusted, a fourth clamping plate can be driven to slide in a second groove by rotating a second threaded rod, the distance between a third clamping plate and the fourth clamping plate is adjusted, and therefore the device can be suitable for bolts and nuts of different sizes, and the universality of the device is enhanced; and more labor can be saved when the nut is rotated under the action of the spring, so that the efficiency is improved.

The novel bone reamer comprises a bone reamer head, a bone reamer rod and a bone reamer handle which are fixedly connected with one another, cutting edges of the bone reamer head are blunt, the bone reamer handle is triangular, and the longer corner of the bone reamer handle is aligned to the direction of the cutting edges of the bone reamer head. Compared with the prior art, the invention has the following advantages: 1, safety: all sharpness of the cutting edge position is blunt, so as to prevent secondary damage in the use process; 2, the cutting edge is recognizable, the long handle of the reamer is opposite to the cutting edge of the reamer, and the direction of the cutting edge of the reamer can be recognized through the handle; 3, the operation performance is good, the handle is designed in a triangular mode, and the handle can be easily rotated in the using process;

The utility model relates to the technical field of vertical cable replacement, in particular to a hanger vertical cable rotating direction adjusting tool which comprises a rotating branch, a rotating upper portion is fixed to the bottom of the rotating branch, and a cable penetrating channel is formed in the middle of the rotating upper portion. Handles are installed at the two ends of the rotating branch part, and a cable clamping plate is installed on the side face of the rotating branch part. The device further comprises an annular base, and a supporting part is arranged on the top of the base. The tool for adjusting the rotation direction of the vertical cable of the lifting appliance has the advantages that the tool is simple in overall structure and convenient to use, the risk that the vertical cable falls off due to exhaustion of workers is avoided, the rotation direction and the number of rotation turns of the vertical cable can be adjusted only by rotating the handle by the workers in the using process, operation is convenient, and the vertical cable can be adjusted according to the lever principle of the handle. And the strength of workers can be saved, rotation is easier, the labor intensity of the workers is reduced, and the overall practicability is good.

The utility model relates to the technical field of air valve machining, and discloses an engine air valve machining tool, which solves the problem that the existing machining tool is inconvenient to automatically feed and discharge air valves, and comprises an air valve feeding assembly, an air valve discharging assembly, an air valve continuous transferring assembly and an air valve positioning and clamping assembly, the valve continuous transferring assembly is fixedly connected to the interior of the valve positioning and clamping assembly, the valve positioning and clamping assembly is located between the valve feeding assembly and the valve discharging assembly, and the valve feeding assembly and the valve discharging assembly are each composed of a supporting frame, a conveying belt, a first servo motor and a plurality of first valve positioning supports. The valve continuous transferring assembly is composed of a strip-shaped shell, a second servo motor, a lead screw, a sliding block, a first air cylinder, an I-shaped support, two second valve positioning supports and two third valve positioning supports. By means of the machining tool, automatic feeding and discharging of the air valves can be achieved, and the machining efficiency is improved.

The present invention discloses a rotary self-resetting bridge pier anti-collision guardrail structure, including an anti-collision mechanism and a buffer mechanism, wherein the buffer mechanism includes an inner rubber air cushion floating block, a groove steel block and a fixed steel plate which are sleeved on the outside of the pier, wherein the fixed steel plate is an annular structure fixed to the top inner end of the inner rubber air cushion floating block, and the inner wall of the fixed steel plate is arranged on the outside of the pier and a gap is arranged between the inner wall of the fixed steel plate and the pier; the anti-collision mechanism includes an annular anti-collision steel plate and an annular slider, wherein the inner wall of the anti-collision steel plate is connected to the outer wall of the slider by a plurality of steel columns, and the slider cooperates with the slide groove on the outer wall of the fixed steel plate to slide. The present invention adopts an external anti-collision mechanism and an internal buffer mechanism, and the two mechanisms can be rotated, so that the anti-collision guardrail structure has a strong ability to absorb energy, and can push the bow away, so that most of the energy is still retained on the ship.

The bearing bush machining tool comprises a base, a circular truncated cone is fixedly arranged at the upper end of the base, a cylindrical groove is formed in the center of the upper end of the circular truncated cone, a plurality of sliding grooves are formed in the upper end of the circular truncated cone and located on the peripheral side of the cylindrical groove, and the angles between every two adjacent sliding grooves are equal. A transmission rod is arranged in the sliding groove, a spiral groove is formed in the outer surface of the transmission rod, and two sets of sliding tables are arranged in the sliding groove. The utility model relates to the technical field of bearing bush machining. According to the bearing bush machining tool, a guide ball is controlled to be inserted into a spiral groove or retreat from the spiral groove through an electric telescopic rod, the purpose of controlling whether a sliding table is affected by rotation of a transmission rod or not is achieved, the moving flexibility degree of the sliding table is effectively improved, the tool can clamp bearing bushes with different radians, and the machining efficiency is improved. And the practicability of the device is effectively improved.

The utility model discloses a page turning type high-strength display cabinet, and relates to the technical field of display cabinets. The device comprises a frame, the bottom of the frame is provided with a first supporting plate and a second supporting plate located on one side of the first supporting plate, one side of the second supporting plate is rotationally matched with a threaded rod, the threaded rod is in threaded fit with a concentric-square-shaped plate, and the inner side wall of the concentric-square-shaped plate is provided with a toothed plate; the multiple display frames are rotationally matched in the frame, gears are arranged at the bottoms of the display frames, and the gears are matched with the toothed plates in a meshed mode. According to the display frame, through the arrangement of the concentric-square-shaped plate, the concentric-square-shaped plate drives the toothed plate to slide under the action of the threaded rod, so that the toothed plate drives the display frame to rotate in the frame through the gear, content on one side of the display frame is displayed, and the display frame is more convenient to rotate.

The invention discloses a transmission mechanism of a flat car position lock of an intelligent parking manager, and relates to the field of flat car position locks, the transmission mechanism comprises a mainframe box, shaft holes are formed in two sides of the mainframe box, rotating shafts penetrate through the shaft holes, and a motor is mounted in the mainframe box; the two ends of the screw rod are supported on the mainframe box, and one end of the screw rod is connected and driven by a motor; the transmission assembly is arranged between the screw and the rotating shaft and transmits power of the screw to the rotating shaft, the two ends of the rotating shaft are supported on the mainframe box, and one end of the rotating shaft penetrates out of the mainframe box and is used for driving the flat car position lock; the sealing assemblies are mounted on two sides of the mainframe box and correspond to the shaft holes, and seal two ends of the rotating shaft relative to the mainframe box; and the cover plate assembly is fixed at the top of the mainframe box. By means of the symmetrical and laminated arrangement design of the nut, the connecting rod and the rocker arm in the transmission assembly, the mechanism runs stably and smoothly, durability and stability are improved, overall rotation is simple and efficient, a cushion pad is arranged between the motor and the mainframe box, the motor is convenient to replace, and the mechanism is suitable for being used in the severe environment.

The utility model relates to the technical field of welding devices, and discloses an anti-dislocation welding device which comprises a workbench, a translation assembly, a mounting seat and a welding strip arranged in the mounting seat, and one side, far away from the translation assembly, of the top of the workbench is slidably connected with a movable shell. A plastic product body is placed on the top of the workbench and located between the translation assembly and the moving shell, one side of the plastic product body abuts against the moving shell, and the bottom of the side, away from the plastic product body, of the moving shell is fixedly connected with a fixing block. According to the welding device capable of preventing dislocation, a plastic product body can be clamped and fixed through the moving shell arranged on the workbench and the clamping assembly arranged on the moving shell, so that the plastic product body can be stably placed on the workbench, and dislocation between the plastic product body and the welding strip is effectively prevented; and the movable shell is in sliding connection with the workbench, so that the device can be suitable for plastic products of different sizes, and the practicability of the device is higher.

The present invention relates to the technical field of medical instruments, and discloses a thumbwheel assembly of an endoscope, an endoscope handle, and an endoscope. The thumbwheel assembly comprises a first thumbwheel body and a second thumbwheel body; the first thumbwheel body has a plurality of retractable first levers extending outward, and the second thumbwheel body has a plurality of retractable second levers extending outward; the plurality of first levers are configured such that when the elongation of one of the first levers is greater than the elongation of the other first levers, the free end of the first lever faces between the cable end and the gripping end of the endoscope handle; the plurality of second levers are configured such that when the elongation of one of the second levers is greater than the elongation of the other second levers, the free end of the second lever faces the button area of ​​the endoscope handle. The endoscope handle comprises a thumbwheel assembly. The endoscope comprises an endoscope handle. The present invention can solve the technical problem of the difficulty in rotating the thumbwheel in the endoscope in the related art through the above technical solution.

This utility model discloses a wire-laying device for power construction, applied in the field of power equipment technology. It includes two symmetrically arranged connecting seats, each with a bidirectional threaded rod rotatably connected inside. Each of the two connecting seats has a symmetrically arranged locking seat on its opposite side, with a rotatable alignment wheel rotatably connected to each locking seat. Each of the two locking seats has a fixed connecting block threaded to the bidirectional threaded rod on its opposite side. The utility model utilizes the bidirectional threaded rod installed inside the connecting seats. When the bidirectional threaded rod rotates, it can shorten the distance between the two locking seats under the action of the connecting blocks. The two alignment wheels on the two locking seats contact the surface of a circular winding reel. As the two alignment wheels continue to shorten the distance, the winding reel moves upward between the two alignment wheels, causing its bottom to move away from the ground, thereby achieving the purpose of feeding material and improving the convenience of feeding heavy winding reels.

The utility model relates to the technical field of eye medicine boxes, and discloses an eye nursing eye medicine box which comprises a storage box, a plurality of partition plates are fixed on the inner wall of the storage box, a placing area is arranged between every two adjacent partition plates, and a taking and placing structure is arranged in the storage box. According to the utility model, through the arrangement of the pick-and-place structure, the plurality of partition plates partition the storage area of the eye drop bottles, when a worker takes the eye drop bottles, the cover plate is rotated clockwise to rotate the pick-and-place notch to the first medicine taking position, the turnover cover is opened to take the eye drop bottles, and then the cover plate is rotated to move the pick-and-place notch to the next medicine taking position, so that the worker can take the eye drop bottles conveniently. A retaining shaft in a movable groove is inserted into a limiting groove under the action of a spring, so that the resistance of the cover plate during clockwise rotation is increased, the cover plate is prevented from rotating easily, the accuracy of a user during medicine taking is improved, meanwhile, the cover plate and a turnover cover are arranged in a matched mode, the risk that external impurities enter a storage area to pollute eye medicine storage is reduced, and the use safety of the user is improved. And the storage safety of the eye drops is improved.

The invention relates to a lathe with a concentric clamp, relates to the technical field of lathes, and aims to solve the problem that turning steps of workpieces are tedious. The lathe with the concentric clamp comprises a machine body used for machining a workpiece, a mounting base is arranged on the machine body, a clamping part used for clamping the workpiece is rotationally arranged on the mounting base, and a driving assembly used for driving the mounting base to move in the length direction of the machine body is arranged on the machine body. The turning device has the effect of improving the turning machining efficiency.

The utility model relates to the field of automobile parts, concretely relates to an electronic mechanical double unlocking structure, including handle seat, handle that rotates set on handle seat, micro -switch and be used for making handle reset's first gear spring, be equipped with rotation part on handle, and the probe of micro -switch is contacted with rotation part, still including swing claw that rotates set on handle seat, the second gear spring of swing claw rotation resistance, swing claw's end is the opposite end, and the opposite end is opposite with the tail end of handle, when handle rotates in the rotation range of electronic unlocking, the tail end of handle and the opposite end are in the separate state, when handle rotates in the rotation range of mechanical unlocking, the tail end of handle and the opposite end are in the opposite state, through the scheme of the application, realize first gear spring and second gear spring different shaft setting, facilitate electronic mechanical double unlocking structure's assembly, reduce assembly difficulty.

The present invention relates to a rolling robot with an external swing arm. The existing rolling robot has a built-in swing block that generates a small driving torque, insufficient driving force, and a problem of affected control accuracy. The device includes a rotatable shell, a horizontally arranged main shaft is set between the left and right side walls of the shell, the main shaft can rotate relative to the shell, a horizontally arranged secondary shaft is arranged at the center of the main shaft and is perpendicular to the main shaft, the secondary shaft can rotate and rotate with the main shaft, the two ends of the secondary shaft are suspended, and an inner swing block is fixedly suspended below the two ends of the secondary shaft, and the two ends of the main shaft are fixed with an external swing arm arranged outside the shell. The present invention arranges an external swing arm outside the shell to improve the overall driving torque, so that the robot control response speed is improved, and the control accuracy is more stable; the detection device is hung on the external swing arm, which is not only more convenient to disassemble and assemble, but also has a larger detection angle and detection range; the detection device is concentratedly arranged in the middle of the left and right directions on the external swing arm, which is more conducive to the stability of walking and turning.

This utility model discloses a quick-install butterfly valve, including a valve unit and an opening / closing unit. The valve unit includes a valve body, connecting ring seats on both sides, and a valve disc rotatably connected to the valve body. The opening / closing unit includes a sleeve, a rotating block rotatably connected inside the sleeve, a sleeve rod fixedly connected to one side of the rotating block, a telescopic rod slidably connected inside the sleeve rod, and a limiting component on the telescopic rod for fixing its position. The valve disc is fixedly connected to the rotating block via the valve rod, the sleeve is fixedly snapped onto the top of the valve body, the sleeve has a positioning hole, and the sleeve rod has multiple equidistant limiting holes. The limiting component fixes the position of the telescopic rod through a spring and a limiting block. This quick-install butterfly valve allows for easy adjustment of the telescopic rod's extension length by adjusting its position within the sleeve rod and fixing it using the limiting component. This allows for adjustment of the telescopic rod's length according to different strength levels, making it easier for the rotating block to rotate.

The utility model provides a rotary type polishing working table which comprises a working table top, a carrier roller and a rotating shaft, the carrier roller is horizontally arranged on the working table top through a support, a mounting seat is further arranged below the working table top, one end of the rotating shaft is fixedly connected with the working table top, and the other end of the rotating shaft is fixedly connected with the support. The other end of the rotating shaft is rotationally arranged in a mounting seat, an assembling panel is further arranged on the mounting seat, a mounting area is formed between the assembling panel and the working table top, at least one support is further arranged on the working table top, and the supports are located on the two radial sides of the carrier roller. The sand core polishing device has the advantages that the carrier roller is used for bearing the sand core, the carrier roller can adjust the sand core to incline leftwards and rightwards during polishing, meanwhile, the support supports the sand core, meanwhile, the sand core is rotated through the rotating shaft, carrying of the sand core is reduced, rotation is easy, and the sand core polishing device is simple in structure and convenient to use. And the labor intensity is also reduced while the mud core grinding quality is guaranteed.

The utility model discloses an electric angle adjusting mechanism of a straightening machine, which relates to the technical field of straightening machines and comprises a casing, a mounting plate is arranged in the casing, a core tube used for being connected with a straightening wheel is sleeved on the mounting plate, an angle adjusting ring is sleeved on the core tube, a mounting frame is arranged on one side of the angle adjusting ring, a worm is arranged on the mounting frame, and the worm is connected with the straightening wheel. A driving motor is arranged at one end of the worm, and a first worm gear part is arranged at the position, corresponding to the worm, of the angle adjusting ring in a matched mode; the driving motor drives the worm to rotate, the worm further acts on the first worm gear piece to drive the angle adjusting ring to rotate, the angle adjusting ring further drives the core barrel to rotate through the key block, and the angle of the straightening wheel is finally changed through the core barrel. Therefore, manual adjustment is replaced, the adjustment efficiency is improved, and meanwhile the labor intensity of workers is greatly reduced.

The utility model relates to the technical field of sluice valves, in particular to a sluice valve with good sealing performance, which comprises a device body, a valve rod, a valve rod, a valve rod, a valve rod, a valve rod, a valve rod and a valve rod, and is characterized in that the device body comprises a valve body, the two sides of the valve body are provided with butt-joint ports; a sealing structure is connected to the outer surface of the valve rod and comprises a supporting ring, and the outer wall of the supporting ring is sleeved with a sealing ring. The limiting plate is rotated to move towards the interior of the groove formed in the supporting ring, then the sealing ring is moved downwards so that the sealing ring can be connected to the outer surface of the supporting ring in a sleeved mode, and when the valve rod is moved towards the interior of the valve body to close the valve body, the sealing ring connected to the outer wall of the supporting ring in a sleeved mode is embedded into the sealing groove formed in the valve body. When the valve rod assists in sealing the valve body, the valve body and the valve rod are sealed through the sealing ring, and the problems that the sealing performance between the valve body and the valve rod is poor, dust and impurities are likely to enter gaps, and consequently the valve rod is difficult to rotate are solved.

The invention discloses an electric power construction wire tightening device, and relates to the technical field of electric power tools, the electric power construction wire tightening device comprises a wire tightening frame, a main shaft, a tightening wire and a mounting frame, the wire tightening frame is provided with two roll shafts, the roll shafts are provided with ratchet wheels, the ratchet wheels are provided with shaft grooves, the wire tightening frame is provided with pawls, and the pawls are inserted into ratchet wheel tooth grooves; the main shaft is arranged in the shaft groove in a sliding mode, a fastening groove is formed in the main shaft, a clamping groove is formed in the shaft groove, a spring connected with the clamping block is arranged in the fastening groove, and the clamping block is inserted into the clamping groove so that the main shaft and the roller shaft can rotate synchronously; the two ends of the fastening wire are arranged on the wire tightening frame and the roller shaft, a first movable pulley is arranged on the fastening wire in a sliding mode, and a hook is arranged on the first movable pulley; the mounting frame is arranged on two sides of the wire tightening frame, and a transmission mechanism for driving the main shaft to rotate is arranged on the mounting frame; the two side faces of the clamping block are inclined faces, a compression spring enabling the main shaft to move is arranged on the main shaft, and the main shaft can drive the roller shaft to wind the fastening line when rotating. The electric power construction wire tightening device provided by the invention has the advantage of tightening two wires at the same time.