33results about How to "Eliminate torque" patented technology

The invention provides a battery heating system of a vehicle, a control method and the vehicle. The system comprises a multi-phase inverter, a multi-phase winding, an energy storage device and a controller. Wherein a bus of the multi-phase inverter is correspondingly connected to a bus of a vehicle battery, one end of the multi-phase winding is correspondingly connected to a bridge arm of the multi-phase inverter, a neutral point of the multi-phase winding is connected to one of the buses of the battery, the energy storage device is connected to the battery, and the controller is connected to the multi-phase inverter; the controller is configured to determine a direct current duty ratio signal and an alternating current duty ratio signal according to the real-time heating requirement of the battery, and control the action of a bridge arm of the multi-phase inverter based on the direct current duty ratio signal and the alternating current duty ratio signal. And heating the battery by using the target alternating current corresponding to the real-time heating requirement of the battery formed at the neutral point of the multi-phase winding. The DC duty ratio signal and the AC duty ratio signal jointly control the action of the multi-phase inverter, so that the battery can be heated through the modulatable duty ratio signal.

The invention discloses carbon fiber impregnation equipment, which relates to the technical field of preparation of carbon fiber prepreg cloth and comprises a creel, a carbon fiber anti-twisting and wrinkle-reducing mechanism, a yarn spreading mechanism and an impregnation pressing mechanism which are sequentially arranged, the carbon fiber anti-twisting and anti-wrinkling mechanism is provided with an inlet horizontal shaping part for horizontally feeding the carbon fiber tows into the carbon fiber anti-twisting and anti-wrinkling mechanism, and an outlet horizontal shaping part for horizontally feeding the carbon fiber tows out of the carbon fiber anti-twisting and anti-wrinkling mechanism; the vertical shaping part is arranged between the inlet horizontal shaping part and the outlet horizontal shaping part and is used for jacking and tensioning the carbon fiber tows along the vertical direction; according to the carbon fiber twisting-preventing and wrinkle-reducing mechanism, the carbon fiber tows are horizontally shaped, and in the horizontal shaping process, the carbon fiber tows are vertically jacked, pressed and tensioned, so that twisting generated when the carbon fiber tows unwound from different unwinding positions reach the same horizontal position can be well weakened and eliminated.

The utility model discloses a stainless steel wire rope with an anti-twisting function, and particularly relates to the field of steel wire ropes, the stainless steel wire rope comprises a steel wire rope body, a plurality of fixing sleeves are sleeved in the middle of the steel wire rope body, connecting blocks are symmetrically arranged at two ends of the steel wire rope body, and a lock hook is arranged at one end of each connecting block. The opposite sides of the connecting block and the lock hook are fixedly connected with a fixing block and a connecting disc correspondingly. Firstly, the connecting block is connected with the steel wire rope body, and the lock hook is connected with the connecting block through the fixing block and the connecting disc, so that the stability of the steel wire rope body and the connecting block cannot be influenced when the lock hook rotates, and the lock hook can automatically rotate when the steel wire rope body is straightened from a winding state to generate torsion by pulling the lock hook; and the thread inserting rod is inserted into the thread hole and penetrates through the folded end of the steel wire rope body, so that the steel wire rope body and the connecting block can be conveniently connected and detached, and combined use is facilitated.

The invention discloses a supporting device and supporting combination equipment, and belongs to the technical field of petrochemical equipment, and the supporting device comprises a base component serving as an equipment connection foundation; the pre-embedded plate is used for being embedded in the ground of an equipment area; the sliding assembly is arranged between the pre-embedded plate and the foundation component, and the sliding assembly is connected with the foundation component or the pre-embedded plate; the limiting pieces are arranged on the periphery of the base component, and gaps are formed between the limiting pieces and the base component; the base component can slide relative to the embedded plate through the sliding assembly, and the multiple limiting pieces limit the periphery of the base component when the base component slides. The position of the equipment can be adjusted to a certain degree, additional force and torque are prevented from being generated between the equipment and a pipeline and between the equipment, the equipment is suitable for the condition of thermal expansion and cold contraction, and then the structural stability of the equipment is ensured.

The present invention discloses a center-of-gravity driven zero overhang CNC lathe, comprising a bed, a transverse guide rail, a longitudinal guide rail, a spindle unit, and a tool holder unit; the transverse guide rail is fixed to the top of the bed, the longitudinal guide rail is fixed to the side of the bed connected to the outside, the spindle unit is connected to the transverse guide rail for horizontal reciprocating motion, the tool holder unit is connected to the longitudinal guide rail for vertical reciprocating motion, and both the spindle unit and the tool holder unit are designed with zero overhang. Beneficial effects of the present invention: The present invention realizes the coordination of zero overhang and center-of-gravity drive, which can weaken the torque on the spindle unit during workpiece processing, reduce the relative vibration between the workpiece and the tool, improve processing accuracy and stability, and extend the service life of the tool.

This invention belongs to the field of motor technology and discloses a high-linearity finite-angle torque motor, comprising a cylindrical rotor and a cylindrical stator, with the rotor housed within the stator. The stator includes N coils and N constant magnetic circuit channels, where N is an even number of at least 2. The rotor's magnet portion has N polarities. The N coils of the stator are evenly arranged circumferentially on the inner side of the stator, with adjacent coils separated by constant magnetic circuit channels. The ends of all coil frames and the ends of the constant magnetic circuit channels together form the rotor's rotational track. Adjacent stator coils have opposite polarities after being energized, and adjacent rotor magnets also have opposite polarities. This invention employs a special stator lamination structure, theoretically eliminating stator cogging torque within the motor's operating angle range, thus improving the linearity of the motor's output torque. Compared to traditional slotted finite-angle torque motors, the output torque fluctuation is reduced by more than 70%.

This utility model discloses a rotary joint and a crane, relating to the field of hydraulic oil conveying technology. The rotary joint includes an oil delivery shaft, an oil supply sleeve, and an oil distribution sleeve. The oil delivery shaft has at least two independent oil delivery channels inside. The oil supply sleeve is rotatably fitted onto the first end of the oil delivery shaft and has oil supply channels corresponding to the corresponding oil delivery channels, which are connected to each other. The oil distribution sleeve is rotatably fitted onto the second end of the oil delivery shaft and has oil distribution channels corresponding to the corresponding oil delivery channels, which are connected to each other. The oil delivery shaft is used to convey hydraulic oil between the oil supply sleeve and the oil distribution sleeve. The pipe connected to the oil supply sleeve and the rotating mechanism connected to the oil distribution sleeve can both rotate coaxially relative to the oil delivery shaft, which can improve the problem in related technologies where the rotary joint is subjected to a counter-torque, causing fatigue stress in the connected fixed pipe, resulting in loosening or damage.

The invention relates to the technical field of optical fibers, and discloses a cable core back-twisting device and a cable core thereof, and the cable core back-twisting device comprises a main frame, a back-twisting assembly, a pay-off assembly and the cable core; the main frame comprises first plate bodies which extend along a first direction and are arranged at intervals and second plate bodies which extend along a second direction and are arranged at intervals, and the first plate bodies and the second plate bodies are connected with each other to form an untwisting space for placing a cable core; the back-twisting assembly is arranged in the back-twisting space and comprises a back-twisting frame and first rotating shafts, the back-twisting frame is arranged in the back-twisting space in the first direction, the two ends of the back-twisting frame are connected with the first rotating shafts correspondingly, and the end, away from the back-twisting frame, of each first rotating shaft is rotationally connected with the second plate body; the pay-off assembly is arranged in the back-twist frame and comprises a second rotating shaft and a reel, the second rotating shaft is arranged in the back-twist frame in the second direction, the reel is arranged on the periphery of the second rotating shaft in a sleeving mode, one end of the cable core is wound around the periphery of the reel, and the other end of the cable core extends out of the back-twist space.

The invention discloses a tail module for an underwater autonomous navigation unmanned platform towed linear array, which comprises a connecting piece, a rotating ring, a guide head and a guide rod, the connecting piece is connected to the tail of the towed linear array, the guide head is rotatably connected with the connecting piece through the rotating ring, the guide rod is arranged at the tail of the guide head, and the guide rod is connected with the connecting piece through the rotating ring. The sliding block is installed on the side wall of the guide rod in a sliding mode, the resistance body is fixedly arranged at the tail end of the guide rod, and the portion, between the sliding block and the resistance body, of the guide rod is sleeved with a spring. The diameter of the guiding head and the outer diameter of the sliding block are both smaller than the inner diameter of a platform tail pipe of the unmanned platform. The tail end of the sliding block extends to be provided with an expansion part, and the outer diameter of the expansion part is larger than the inner diameter of a platform tail pipe of the unmanned platform. The tail module can assist in completing initial active release of the towed linear array, and the complexity, the space size and the energy consumption requirements of the retracting and releasing device are reduced.

A mounting apparatus (100) comprising a housing adapted to be removably attachable to a support means, the mounting apparatus further comprising a platform (102) attached to a housing pivotally attached to the housing and rotatable relative thereto about an axis (O), where the housing has an annular cam (106) arranged therein, the annular cam (106) being adapted to engage with the platform (102), and the platform (102) being adapted to engage with the platform (102). The invention relates to a device (100) for operating a motor vehicle, comprising a cam (110, 116) arranged concentrically with said axis and having an inner cam surface (118), and comprising a cam follower (110, 116) comprising a cam engagement surface adapted to engage with and follow said inner cam surface upon rotation of said cam about said axis, said cam follower having a yoke engagement surface adapted to engage with and follow said inner cam surface upon rotation of said cam about said axis. The yoke engagement surface is adapted to engage with a yoke (136) and to transfer a force between the cam follower and the yoke. Rotation of the housing relative to the housing provides transmission of force between the platform and a spring arrangement.

This utility model relates to a photomask clamp for microscopic inspection, belonging to the field of electronic device manufacturing and processing. It includes: a substrate with a placement groove at its center for accommodating the photomask; several clamping blocks slidably connected to the substrate surface, each clamping block being evenly distributed along the periphery of the placement groove and sliding radially along the groove; an adjustment mechanism including a rotating ring rotatably connected to the substrate and guide lugs evenly distributed on the rotating ring; the rotating ring rotating coaxially with the placement groove; the guide lugs corresponding in number to the clamping blocks, and each guide lug having a guide groove inclined outwards from the rotating ring; and each clamping block having a guide rod extending into and slidably connected to the guide groove; and a locking mechanism for locking or releasing the rotating ring and the substrate. This utility model ensures that the photomask is always clamped at the absolute center position of the placement groove, eliminating offset or twisting caused by asynchrony on both sides, and achieving high-precision automatic centering and clamping of the photomask.

The application discloses a full-magnetic-force-supported rotor unmanned aerial vehicle and a flight control method thereof. The rotor unmanned aerial vehicle adopts a high-speed non-iron-core permanent magnet synchronous motor to realize driving rotation, eliminates iron core loss during high-frequency and high-speed operation of the motor, and directly connects the blade and the motor rotor. A Halbach permanent magnet array and an aluminum ring are respectively fixed in corresponding grooves of an outer ring frame of a shell and an outer ring frame of a rotor, so that axial suspension force and partial radial suspension force are generated, the main radial suspension force is provided by a radial passive permanent magnet ring, and the rotor blade system is fully suspended. The shell outer ring frame and the shell inner ring frame are fixed by spokes, so that the overall weight can be reduced while the mechanical strength is ensured. The motor rotating speed and the guide vane angle are adjusted by the flight control method, so that the vertical lifting, air hovering, horizontal flight and stable landing of the rotor unmanned aerial vehicle are realized. The full-magnetic-force-supported rotor unmanned aerial vehicle has small electromagnetic loss, no mechanical friction and high cooperativity, and can improve the system operation efficiency and stability.

The application provides a steel sheet pile cofferdam structure and belongs to the cofferdam building field.The steel sheet pile cofferdam structure comprises a plurality of steel sheet pile bodies which can be mutually inserted and assembled;the plurality of steel sheet pile bodies are driven into the deep bottom of a river channel by a pile driver, and two adjacent steel sheet pile bodies are mutually inserted;the plurality of steel sheet pile bodies cooperate with corner pieces to jointly form a rectangular cofferdam;the corner pieces are located at the four corner positions of the rectangular cofferdam;the inner wall of the rectangular cofferdam is provided with a plurality of surrounding purlin assemblies which are arranged from top to bottom and are rectangular;the surrounding purlin assemblies are uniformly provided with a plurality of support assemblies, and the support assemblies are in abutting cooperation with the inner wall of the rectangular cofferdam;the support assemblies in the surrounding purlin assemblies from top to bottom are jointly fixed and connected by bolt rods and nuts in one-to-one correspondence;the three-point support design, the adjustable assembly and the modular linkage structure are used to solve the problems of insufficient support strength, poor deformation adaptability and overall stability of the deep excavation cofferdam, and the construction safety and the structural reliability are significantly improved.

This solution discloses a cam-driven pressure-reducing mechanism, including a camshaft and a swing block. The swing block can swing from a pressure-reducing position to a release position under centrifugal force, and return from the release position to the pressure-reducing position under the action of a spring force parallel to the camshaft axis. The swing axis is perpendicular to the camshaft axis. A pin is fixed radially along the camshaft, and the swing block is pinned with the pin as the swing axis. A radially penetrating mounting hole for the swing block is provided on the camshaft, and the swing block passes through the mounting hole. With the pin as the boundary, one end of the swing block is the heavy part, and the other end is the light part, with the mass of the heavy part being greater than the mass of the light part. The beneficial effects of this solution are: 1. Higher sensitivity while meeting functional requirements; 2. Effective reduction of the weight of the swing block, meeting the requirements of lightweight design; 3. Setting the spring force direction parallel to the camshaft axis eliminates torque during high-speed rotation and extends the service life of the spring.

The utility model provides a cassava planter, include: main steel frame, walking wheel, cutter box, the both sides of main steel frame lower part are equipped with bearing seat respectively, is installed with first transmission shaft in bearing seat, walking wheel is connected with first transmission shaft one end, first transmission shaft other end is equipped with first sprocket, the cutter box has a plurality of, cutter box installs on the main steel frame respectively, be equipped with second transmission shaft on the cutter box, second transmission shaft penetrates cutter box, just second transmission shaft is connected with the gear inside cutter box, the second transmission shaft between cutter box is connected each other, be equipped with one -way sprocket on second transmission shaft, one -way sprocket is connected with first sprocket through first chain, the utility model discloses a one -way sprocket is set up on second transmission shaft, realizes the one -way transmission of power through one -way sprocket, can eliminate the torque that the speed difference of two walking wheels rotation speed is inconsistent causes second transmission shaft to improve the service life of second transmission shaft, improves the reliability of equipment.

The invention discloses a deep well liquid extractor water pipe pressure relief assembly and an application method thereof, and relates to the technical field of in-situ leaching uranium mining related machinery. A deep well liquid extractor water pipe pressure relief assembly comprises a component detection device. The component detection device comprises a hydraulic cylinder B, a piston cylinder B and a liquid path assembly; the liquid path assembly comprises a connecting pipe C, an adapter, an explosion valve, a three-way connector B, a one-way valve B, a manual ball valve and a water inlet pipe which are sequentially connected in a sealed mode. The deep well liquid extractor lifting method is based on a deep well liquid extractor collecting and releasing system. The method comprises the following steps: detecting an explosion valve; the water pipe is clamped and fixed; a water pipe decompresses and drains water; and coiling the water-oil pipeline. A water pipe pressure relief device and a part detection device are newly designed for a liquid extraction mechanism in CN116292220B, only the explosion valve passing detection is used as a component of the water pipe pressure relief device, and the reliability of the water pipe pressure relief function is greatly improved.

The utility model discloses a kind of outer hexagonal flange wire lifting screws, it includes link rope, outer hexagonal head and the stud being connected with the outer hexagonal head, the outer hexagonal head is formed flange by increasing radially near the stud side, the stud is equipped with baffle near the outer hexagonal head one end, annular rope groove is formed between the baffle and the flange, one end of the link rope is connected on the annular rope groove, and the other end is equipped with lifting ring. The utility model is reasonable in structure design, when installing, just use spanner to tighten outer hexagonal head once, installation can be completed, overcome the defect of traditional need twice height operation, installation is completed in one step, greatly improve aerial work efficiency;Moreover, link rope can freely slide in rope groove and self-adapting load angle change eliminates torque, effectively avoid link rope distortion or cause stud loosening, ensure firm installation, use safely.

The deep well liquid extractor retracting and releasing system and lifting method relate to the field of mechanical technology related to in-situ uranium leaching. The deep well liquid extractor retracting and releasing system includes a three-zone coil device, a water pipe pressure relief device and a water-oil pipeline restraint; the three-zone coil device includes a main frame, a water pipe coil mechanism and an oil pipe coil mechanism; the water pipe pressure relief device includes a hydraulic cylinder, a piston cylinder, an upper waterway assembly and a lower waterway assembly; the water-oil pipeline restraint is fixedly installed on the outside of a water pipe and two oil pipes at intervals. The deep well liquid extractor lifting method is based on the deep well liquid extractor retracting and releasing system, and the steps are as follows: clamping and fixing the water pipe; relieving the pressure of the water pipe and draining the water; coiling the water-oil pipeline. The present invention is used for the retracting and releasing operation of the liquid extractor in an in-situ uranium leaching mine, and has the characteristics of simple operation, stable retraction and release, and avoiding scratches or collisions with the well wall, and can effectively reduce the power requirements of the three-zone coil device.

The invention discloses a long-baseline deep-sea binocular measurement camera which comprises a control cabin, a deep-sea camera and a double-rod supporting assembly. The control cabin is used for camera control and a storage circuit; pressure-resistant fastening assemblies are symmetrically mounted at the two ends of the control cabin; the number of the deep sea cameras is two. The two deep sea cameras are installed at the ends, away from the control cabin, of the two pressure-resistant fastening assemblies correspondingly. The optical axes of the two deep sea cameras are located on the same plane, and the included angle between the two optical axes is 180 degrees to 2 alpha. The two deep sea cameras are electrically connected with the control cabin; the double-rod supporting assembly is installed between the two deep sea cameras. According to the invention, the binocular measurement camera has a long base line, can obtain a large public field of view, is small in deformation and stable in structure in a deep sea high-pressure environment, guarantees the constancy of internal and external parameters of the binocular measurement camera in the measurement process, and improves the measurement precision and accuracy.

The present invention relates to the technical field of packaging bag processing, specifically to a tear-resistant non-woven packaging bag production welding and forming device, comprising an aluminum profile frame and a welding assembly. Through the friction between the front and rear stretching wheels in the welding assembly and the surface of the non-woven packaging bag, the non-woven packaging bag is stretched forward and backward during the reverse rotation, eliminating the front and rear wrinkles of the non-woven packaging bag, and the reversing circular sleeve also drives the path groove to rotate together, so that under the sliding connection between the positioning pin and the path groove, the reversing circular sleeve generates a force to slide along the axial direction of the light rod, and further pulls the stretching wheel to move together through the connection of the anti-tear spring, exerting a straightening effect in the up and down directions on the non-woven packaging bag, and then combined with the straightening effect on the front and rear directions of the non-woven packaging bag, the horizontal and longitudinal wrinkles of the non-woven packaging bag can be eliminated, and wrinkle weld scars can be avoided at the welding point. At the same time, the anti-tear spring can prevent the bag body of the non-woven packaging bag from being torn.

The invention belongs to the technical field of marine equipment, and relates to an automatic steel wire rope tensioning mechanism, a suspension arm and a marine fender retracting and releasing device.The automatic steel wire rope tensioning mechanism comprises a fixed pulley block and a movable pulley block, and the fixed pulley block comprises a plurality of fixed pulleys arranged side by side and a fixed pulley supporting frame; the movable pulley block is located below the fixed pulley block and comprises a plurality of movable pulleys, a movable pulley supporting frame, a balance weight and a plurality of limiting wheels, the movable pulleys are installed on the upper portion of the movable pulley supporting frame side by side, the balance weight is installed on the lower portion of the movable pulley supporting frame, and the limiting wheels are installed on the side wall of the movable pulley supporting frame. The automatic steel wire rope tensioning mechanism adopts a pulley block form, automatically tensions the steel wire rope under the action of gravity, and is convenient to use; a movable pulley block adopts a self-aligning bearing, so that a movable pulley is automatically adjusted to the direction of a steel wire rope, the torsional moment is eliminated, a counterweight is prevented from being blocked in a slideway, and an automatic tensioning mechanism is mounted in a suspension arm of the marine fender retracting and releasing device, so that potential safety hazards are eliminated.

The invention discloses a deep well liquid extractor pipeline collecting and releasing assembly and an application method thereof, and relates to the technical field of in-situ leaching uranium mining related machinery. A pipeline collecting and releasing assembly of a deep well liquid extractor comprises a three-partition coil pipe device. The three-partition pipe coiling device comprises a main body rack, a water pipe coiling mechanism and an oil pipe coiling mechanism; the two sets of oil pipe coil pipe mechanisms are distributed on the two sides of the water pipe coil pipe mechanism, the water pipe coil pipe mechanism is detachably connected with the upper end opening of the water pipe, and the two sets of oil pipe coil pipe mechanisms are detachably connected with the upper end openings of the two oil pipes respectively. The deep well liquid extractor lowering method is based on a deep well liquid extractor pipeline retracting and releasing assembly and is used for lowering a liquid extractor from the outside of an in-situ uranium leaching mine to a preset depth in the well. The method comprises the following steps: suspending the liquid extractor; installing a liquid extractor guide device; and lowering the water-oil pipeline. The device has the advantages of being easy to operate, stable in folding and unfolding and capable of avoiding scratching or colliding with the well wall.

The utility model discloses a hinged shaft water passing pipeline switching device of a single cold cover plate for a pedestal pan, which is used for hinging a rear shell and a seat ring, and comprises a switching rotating piece, a bearing part fixed in a seat ring shaft hole, and a first pipe column and a second pipe column which are communicated with each other and are respectively arranged at two ends of the bearing part, the first pipe column is connected and installed to a water inlet adapter in the rear shell through the inner section of the main pipe shell, a plurality of avoiding notches are formed in the bearing part, and the avoiding notches are used for avoiding space and receding for a spray washing device arranged in the rear shell and a plurality of flexible rubber hoses of a control valve installation part arranged in the seat ring respectively; the adapting fixing piece comprises a socket barrel which is rotatably connected with the second pipe column and a third pipe column which is integrally formed and communicated with the socket barrel, and the third pipe column is connected with the control valve mounting part through the main pipe ring inner section. According to the closestool cover plate provided with the switching device, the torsion generated when the main water inlet pipe between the control valve mounting part on the seat ring and the spray gun assembly in the rear shell is twisted when the main water inlet pipe turns over along with the seat ring is eliminated through the structure.

The present invention provides a motion execution system and method based on negative pressure and friction. The system is based on the prior art self-sufficient device (100) and adds guide posts (200), friction parts (300), limit blocks (400) and other components. The friction between the friction parts (300) and the guide posts (200) is controlled to realize the movement of the linkage rod (130). The system realizes the process of changing from accelerated motion to uniform, accelerated or decelerated motion by increasing friction or active friction to balance the negative pressure that always exists, thereby satisfying the uniform or controllable feed force to achieve the purpose of controlling the speed of output liquid or gas, fluid metering, etc. The system can be applied to various devices such as thrust actuators, syringes, reciprocating motion devices, and injection pumps, and overcomes the previous method of changing the structure and components of the device by changing the diameter of the negative pressure tube or increasing or decreasing the number of negative pressure tubes to control the motion execution performance. A set of devices can form multiple execution behaviors.

The application discloses a high-strength steam turbine rotor blade and a processing method, and relates to the technical field of steam turbine rotor blades. The high-strength steam turbine rotor blade comprises a impeller, circular grooves are arranged on the two sides of the impeller, fixing structures are arranged on the two sides of the impeller, blades are arranged in the two circular grooves, the blades are provided in a plurality of groups, blade roots are welded on the sides of the blades, connecting portions are fixedly installed on the sides of the blade roots, limit grooves are arranged on the inner side walls of the circular grooves, and the limit grooves are provided in a plurality of groups. The connecting portions with special shapes and structures are arranged on the blade roots, so that the blade roots have better structural stability when being connected with the impeller or the rotating drum, the shape and the setting angle of the blades are changed, the blades are arranged in a circumferential direction, the axes of the blades and the rotor main shaft are perpendicular, the torque of the centrifugal force on the blades can be eliminated when the blades work, and the structural strength of the blades is improved.

The invention relates to the technical field of packaging bag processing, in particular to a tear-resistant non-woven fabric packaging bag production welding forming device which comprises an aluminum profile rack and a welding assembly. Through the friction force between a front cloth stretching wheel and a rear cloth stretching wheel in the welding assembly and the surface of the non-woven fabric packaging bag, the non-woven fabric packaging bag is straightened front and back in the front-back reverse rotation process, front-back wrinkles of the non-woven fabric packaging bag are eliminated, a reversing round sleeve further drives a path groove to rotate together, and under the sliding connection of a positioning pin and the path groove, the non-woven fabric packaging bag is straightened back and forth. The reversing round sleeve generates force which slides in the axial direction of the polish rod, the cloth stretching wheel is further pulled to move together through the connecting effect of the anti-tearing spring, the vertical stretching effect is exerted on the non-woven fabric packaging bag, and transverse and longitudinal wrinkles of the non-woven fabric packaging bag can be eliminated in cooperation with the stretching effect on the non-woven fabric packaging bag in the front-back direction. And meanwhile, the bag body of the non-woven fabric packaging bag can be prevented from being torn by the anti-tearing spring.

The utility model provides a neck posture nursing and correcting device which comprises a supporting assembly, a fixing assembly and a fixing assembly. The supporting assembly comprises a thoracic cavity supporting part and a lower jaw supporting part fixedly connected to one end of the thoracic cavity supporting part; the traction device comprises a traction belt, a first air bag and a second air bag, the two ends of the traction belt are connected with the thoracic cavity supporting part, the first air bag is installed on the traction belt, the second air bag is installed on the first air bag, and a plurality of massage heads are distributed on the second air bag; the fluid control device is respectively communicated with the first air bag and the second air bag through a first pipeline and a second pipeline, and is used for controlling the first air bag and the second air bag to charge and discharge fluid. The problem that the lower cervical vertebra is stressed excessively is solved, it is guaranteed that the sight of a user is in a horizontal state all the time, daily life, study and work are basically not affected, the use requirements of the user in all aspects are met, the structure is simple, carrying is convenient, regular massage can be conducted on the rear cervical vertebra of the human body, and the use effect is good. And the inconvenience of manual massage is solved.

The invention discloses a deep well liquid extractor collecting and releasing system and an extraction method, and relates to the technical field of in-situ leaching uranium mining related machinery. A deep well liquid extractor collecting and releasing system comprises a three-partition coil pipe device, a water pipe pressure relief device and a water-oil pipeline restraint device. The three-partition pipe coiling device comprises a main body rack, a water pipe coiling mechanism and an oil pipe coiling mechanism; the water pipe pressure relief device comprises a hydraulic cylinder, a piston cylinder, an upper waterway assembly and a lower waterway assembly. The water-oil pipeline constraining devices are fixedly installed outside the water pipe and the two oil pipes at intervals. The deep well liquid extractor lifting method is based on a deep well liquid extractor retracting and releasing system and comprises the following steps that a water pipe is clamped and fixed; a water pipe decompresses and drains water; and coiling the water-oil pipeline. The device is used for collecting and releasing the liquid extractor in the in-situ uranium leaching mine, has the advantages of being easy to operate, stable in collecting and releasing and capable of avoiding scratching or colliding with the well wall, and can effectively reduce the power requirement of the three-partition coil pipe device.

The application discloses a product detection equipment, and particularly relates to the technical field of product detection, which comprises a detection rack, a workpiece and a suction device, the inside of the detection rack is sequentially provided with a work station clamping block, a multi-motion transfer frame and a positioning plate, the work station clamping block and the multi-motion transfer frame are used for stably placing the workpiece inside the positioning plate, the inside of the positioning plate is provided with a clamping assembly, and the clamping assembly is used for applying constant pressure to the workpiece inside the positioning plate and lifting the workpiece to observe the sample surface change during the detection process; after the positioning plate carries the workpiece and moves to a preset detection position, the clamping claw opens in an eight-shaped arc line movement along the bottom of the workpiece, the claw body retracts along an arc line track, still slides along the arc surface of the bottom of the workpiece in the initial stage of separation, gently weakens the lifting force, avoids instantaneous separation of the two, the top convex frame pushes the workpiece upward, the bottom of the workpiece is lifted away from the position of the claw tip, and the workpiece presents a low-obstruction suspended support state in the detection station.

The utility model provides a permanent magnet synchronous speed reducer for intelligent storage, which comprises a permanent magnet synchronous motor, a speed reducer connected with the permanent magnet synchronous motor and an inverter connected with the permanent magnet synchronous motor, and three groups of output ports of the inverter are respectively connected with three-phase winding interfaces of the permanent magnet synchronous motor. The direct-current power supply is used for converting direct-current power into alternating-current power supplied to the permanent magnet synchronous motor; a first current sensor and a second current sensor are arranged on two branches of the inverter. According to the utility model, the inverter is additionally arranged, and the A-phase branch and the B-phase branch of the inverter are provided with the first current sensor and the second current sensor; the three-phase current is further used for adverse effects caused by current measurement errors, so that true values of the three-phase current equivalently have approximately equal gains, balanced three-phase current is obtained, and torque and rotating speed fluctuation caused by the current measurement errors is eliminated; safe and reliable operation of the system is improved, and personal economic safety is improved.