3424 results about "Torsion spring" patented technology

The invention relates to the technical field of welding devices, and discloses a low-alloy structural steel welding device capable of cleaning surface welding slag, which comprises a welding frame, a rotating frame is rotatably mounted on the welding frame, a driving gear ring is rotatably mounted on the rotating frame, and a feeding and discharging station, a preheating station, a welding station and a slag cleaning station are sequentially arranged on the welding frame in the anticlockwise direction. A guide shaft is rotationally mounted at the position, corresponding to the slag removal station, of the welding frame, a guide gear meshed with the driving gear ring is mounted on the guide shaft, and four welding systems are mounted on the welding frame. Through differential meshing design of the fan gear and the driven gear and in combination with an elastic reset mechanism of the torsional spring, the cleaning frame generates a circulating switching mode of'high-frequency small-amplitude vibration 'and'low-frequency large-amplitude vibration' at the slag cleaning station, the high-frequency vibration can accurately crush loose welding slag, the low-frequency vibration can effectively shake off the firmly attached welding slag, and therefore the welding slag cleaning efficiency is improved. And the two modes alternately act to cover welding slag characteristics generated by different welding processes.

The invention belongs to the technical field of heat exchange, and particularly relates to a wall scraping type film evaporator for concentrated liquid based on a hydraulic support, the wall scraping type film evaporator comprises an evaporation cylinder, angle control units are uniformly arranged in the evaporation cylinder in the circumferential direction, and a displacement adjusting unit is arranged at one end of each angle control unit; through toothed belt transmission between toothed belt wheels, the torque between a torsion spring and an angle rod is dynamically adjusted, the vertical dip angle between a scraping plate and the barrel wall of an evaporation barrel is linearly adjusted, and meanwhile the compression amount between a ball head and an eccentric wheel is changed through eccentric interaction between an end ring and the eccentric wheel when the end ring rotates; after the vertical inclination angle of the dynamic adaptive scraper is adjusted, the gap between the scraper and the wall of the evaporation cylinder is constant, the film thickness is stabilized, and the heat transfer uniformity of unit area is improved; the number of teeth and the modulus between the control gear ring and the end dividing gear are linearly adjusted, the steering difference between the steering ring pipe and the angle pipe is dynamically adjusted, the horizontal dip angle between the scraper and the barrel wall of the evaporation barrel is linearly matched, and material flowing and film uniformity are optimized.

The invention discloses an air jet loom reed defect detection device, and relates to the technical field of detection, the air jet loom reed defect detection device comprises a support table, a rotating shaft is rotatably connected in the support table, the surface of the rotating shaft is fixedly sleeved with a clamping gear, and the surface of the rotating shaft is movably sleeved with two torsion springs; the opposite ends of the two torsion springs are fixedly connected with the two sides of the clamping gear, so that the upward moving distance of the lifting rack is larger than the upward moving distance of the telescopic outer rod, then the lifting rack drives the rotating gear to rotate in a large range, a worker is conveniently reminded of unevenness of a reed wire on the reed, the reed is conveniently detected, and the working efficiency is improved. And meanwhile, a user can conveniently amplify detection data, so that a slight height difference can be conveniently amplified, a worker can be conveniently assisted in watching, the detection convenience is improved, the phenomenon of omission is prevented, and unqualified reeds are prevented from flowing into the market to the maximum extent.

The application discloses a kind of automobile seat slide rail structures, it is related to the technical field of automobile accessories, it includes outer rail, inner rail, rocker mechanism and guiding limiting mechanism;Rocker mechanism includes the rod body being arranged in inner rail, the proximal end of rod body is connected with crank after extending out of inner rail, the distal end of rod body is provided with locking plate and torsion spring;The side of locking plate is connected with rod body, the other side of locking plate is provided with several clamping teeth;The side wall of outer rail is provided with locking hole compatible with clamping tooth;Guiding limiting mechanism includes fixed plate, limiting pin and limiting block;Fixed plate is arranged in inner rail and below rod body, the middle part of fixed plate is provided with guiding slot along the axial direction of inner rail;The lower end of limiting pin is connected with the inner bottom wall of outer rail, the upper end of limiting pin is passed through guiding slot and then abuts on rod body;Limiting block is provided with through hole for rod body to pass through, and the upper end of limiting block is connected with inner rail, the lower end of limiting block is connected with fixed plate;Limiting pin and limiting block are made of rubber material.

The invention provides a coil winding machine for transformer production, and belongs to the technical field of transformer production. The winding machine comprises a tension adjusting frame, a torsion spring, a winding frame, a force application column and a tight supporting plate. An enameled wire is wound on the tension adjusting frame, and the tension adjusting frame adjusts the conveying tension of the enameled wire through swinging; the torsion spring is connected with the tension adjusting plate and used for adjusting the swing angle of the tension adjusting frame. The winding frame is used for mounting an iron core and is configured to be rotationally arranged; the force application column penetrates through and is arranged on the side wall of the winding frame in a sliding manner; the tight supporting plate is used for tightly supporting an iron core nested on the winding frame, the tight supporting plate is connected with the force application column, and the distance between the tight supporting plate and the winding frame is adjustable through sliding driving of the force application column. According to the coil winding machine for transformer production, the winding tension can be automatically adjusted, and an iron core can be conveniently disassembled and assembled.

The invention belongs to the technical field of plastic recovery, and discloses a plastic part recycling processing device which comprises a processing frame, a conveying mechanism is fixed to the top end of the processing frame, and a vibration mechanism is installed at one end of a crushing mechanism. The device can extrude an extension rod through a second pressing rod, so that the extension rod drives a first connecting rod and a guide plate to rotate, an injection molding part conveyed to the top end of the guide plate rotates downwards, and after the second pressing rod is separated from the extension rod, a torsional spring resets the first connecting rod and the guide plate through the restoring force of the torsional spring; according to the device, the guide plate is arranged, so that the injection molding parts falling on the guide plate are shaken, the injection molding parts which are clamped together and are different in size are separated in advance, the injection molding parts are divided into three types from small to large and fall into the guide box at the bottom to be guided, and therefore the purpose that the device can conveniently separate the injection molding parts which are clamped together and are different in size through double vibration is achieved.

The invention provides a centrifugal machine rotor identification and control method and system, and relates to the field of centrifugal machines. The method comprises the steps that experimental data are input, sensing data are collected for comparison and verification, centrifugal parameters are generated, and the centrifugal parameters comprise the type, the volume, the mass and the concentration of a centrifugal tube and a solution; scanning a rotor ID and calling historical data, constructing a rotating speed-centrifugal parameter curve model, and determining a target rotating speed according to centrifugal parameters; real-time state data of a main shaft in the double-bearing structure of the rotor are monitored, implicit association between the real-time state data is analyzed, a constraint rule is generated, and the real-time state data comprise the physical state of the main shaft, the pawl-torsion spring mechanism state, the state of the double-bearing structure and the wind speed; and the real-time rotating speed of the rotor is obtained, and the real-time rotating speed of the rotor is adjusted in real time based on the constraint rule The technical problem that the centrifugal machine is low in precision, safety and efficiency due to the fact that the rotor rotating speed is preset depending on fixed single data is solved.

An interlock assembly for securing a passenger seat tray table including a mounting block mountable to a passenger seat, a catch pivotally mounted to the mounting block and configured to pivot about a first pivot axis, a handle pivotally mounted to the mounting block and configured to pivot about a second pivot axis, a first torsion spring biasing the catch open, and a second torsion spring biasing the handle closed. In use, the handle and the catch are configured to close and interlock to secure the passenger seat tray table, and disengage and open to release the passenger seat tray table. The interlock assembly may be a line replaceable unit, a component of a tray table assembly, a component of a passenger seat assembly, etc.

The invention discloses a dose adjustment forward and reverse rotation structure of a medicine delivery device, and belongs to the technical field of medical instruments, the dose adjustment forward and reverse rotation structure comprises a knob, a ratchet seat, ratchet teeth, jumping teeth and an injection spring, the ratchet seat is connected with the ratchet teeth through a forward sound generating part, and the ratchet teeth and the jumping teeth are connected through a reverse sound generating part in a clutch mode; a first forward rotation cooperation part and a first reverse rotation cooperation part are arranged on the rotary knob, a second forward rotation cooperation part and a second reverse rotation cooperation part are arranged on the jumping teeth, and the injection spring is used for enabling the ratchet wheel teeth to be connected with the jumping teeth. The device is simple in structure, convenient to install and good in stability, the preset dosage can be adjusted through clockwise rotation, the force stored by the torsion spring can be clamped, the preset dosage can be reduced through anticlockwise rotation until the preset dosage returns to the zero position, forward rotation is converted into radial elastic tooth jumping meshing sound production, and reverse rotation is converted into axial tooth jumping meshing sound production.

A hood hinge includes a hood mounting bar, a housing tube having first and second open ends, and a first bracket fixedly connecting the hood mounting bar to the housing tube. A rubber insulator is disposed within each of the first and second ends of the housing tube, and a self-lubricated bushing is disposed within each rubber insulator. A first torsion spring is disposed around the housing tube proximate to the first end of the housing tube. A second bracket has a base and first and second flaps extending from the base over the first and second ends of the housing tube, respectively, and a hinge pin is disposed through the first and second flaps, the self-lubricated bushings, and the housing tube.

The invention discloses a wheel-legged robot for teenager education and a control system thereof.The wheel-legged robot comprises a vehicle-mounted frame and a driving assembly arranged on the outer wall of the vehicle-mounted frame, and the driving assembly comprises a joint motor, a driving arm, a torsion frame, a torsion spring, a first lifting rod, a second lifting rod, a driving wheel, a limiting shaft, a driving motor and a control assembly; the joint motors are fixedly arranged on the two sides of the outer wall of the vehicle-mounted frame. A four-connecting-rod and torsion spring balance mechanism is used as a core, smooth wheel-leg switching, easy obstacle crossing, LQR and reinforcement learning fusion, online self-adaption, more stable and more power-saving movement and voice, vision and gesture multi-mode interaction facing teenagers are achieved, complex tasks can be completed by speaking sentences and moving hands, a low-cost motor is developed by itself, a full-open-source design is adopted, and the robot is more convenient to use. Students can disassemble, assemble, expand and re-create, mechanical, electronic and programming knowledge is communicated in practical practice, and the education of department and creations is really extended from class to family and future.

The invention relates to the technical field of insulin pumps, in particular to a simple needle assisting module for an insulin pump, which comprises a bottom shell, and a fluid pushing module, a percutaneous insertion module and a reciprocating driving module which are arranged in the bottom shell, a mounting groove is formed in the bottom shell, the reciprocating driving module comprises a torsion spring, a guide block and a driving block, and the torsion spring has pre-torsion amount; one end of the torsion spring extends outwards and forms a connecting arm, a first limiting groove and a second limiting groove are formed in the installation groove, a strip-shaped groove is formed in the guide block, the driving block comprises a first sliding block used for fixing a needle body and a second sliding block used for fixing a sleeve, the guide block is arranged above the torsion spring, and the connecting arm of the torsion spring is movably arranged in the strip-shaped groove of the guide block. And in the process that the torsional spring releases the pre-torsion amount, the connecting arm drives the guide block to move in the mounting groove in the insertion or retraction direction. The insulin pump achieves needle assisting operation through cooperation of the extension arm at the end of the torsional spring and the guide block, and is simple in structure, convenient to install, good in stability and low in cost.

A scalable mobile phone case, comprising: an upper shell and a lower shell, wherein the upper shell and lower shell combine to form a cavity capable of holding a mobile phone. The upper shell has an upper connecting portion, and the lower shell has a lower connecting portion that interfaces with the upper connecting portion. The upper and lower connecting portions are connected via a sliding mechanism, enabling reciprocating sliding along the longitudinal axis of the mobile phone case. A torsion spring is positioned between the upper and lower connecting portions. Through the interaction between the upper and lower connecting portions, the upper and lower shells can slide relative to each other, allowing the case to switch between a separated state and a closed state. The elastic force of the torsion spring ensures that the upper and lower shells remain stable in either the separated or closed state.

The utility model discloses a dish-washing machine dish basket safety lock mechanism which is characterized in that the dish-washing machine dish basket safety lock mechanism comprises a dish basket installation base, an unlocking lever, a lock pin connecting rod connected with a dish basket lifting hinge, a sliding rail support assembly and a torsion spring, the dish basket installation base is connected to the sliding rail assembly, and a dish basket fixing piece is arranged on the sliding rail support assembly; a lock pin I and a lock pin II are respectively arranged on two end sides of the lock pin connecting rod; the bowl basket mounting seat is provided with a slot corresponding to the unlocking lever, a lever shaft is arranged in the slot, and the unlocking lever is rotationally connected with the bowl basket mounting seat through the lever shaft; the bowl basket mounting seat is provided with a first retaining lock groove and a second retaining lock groove, the end of the unlocking lever extends to the first retaining lock groove, the first retaining lock groove corresponds to the first lock pin, and the second retaining lock groove corresponds to the second lock pin. The bowl basket fixing piece is provided with a bowl basket fixing piece lock pin groove and a torsion spring shaft, the torsion spring is wound on the torsion spring shaft, and one end of the torsion spring abuts against the first lock pin. The device is simple in structure, good in stability and easy and convenient to operate.

A luggage compartment hinge having a first hinge leaf with one bearing bush arranged between two second hinge leaf bushes. In an axle tube, non-rotatably connected to the first hinge leaf bush and rotatable in the second hinge leaf bearing bushes, there is a torsion spring, fastened at its first end to the axle tube and at its second end to a pretensioning adjusting element. A pivoting-movement damping element is arranged between the first and second hinge leaves. The adjusting element includes: a latching element in the second hinge leaf second bush with a ratchet wheel having an outer gear rim; a locking pawl mounted on the second bush for engagement in the outer gear rim; and a stop element which limits the rotation angle of the adjusting element. This arrangement allows the locking effect of the locking pawl to be ensured even without axial pretensioning of the torsion spring.

The invention discloses a safety hammer for laminated glass, and relates to the field of automobile safety instruments, the safety hammer comprises a grab handle and a hammer head fixed at one end of the grab handle, the front end of the hammer head is provided with a conical tip, one side, facing the grab handle, of the hammer head is provided with an overturning cutting piece, the overturning cutting piece is rotatably connected with the hammer head through a rotating shaft, and a torsional spring is arranged between the overturning cutting piece and the hammer head; and the torsion spring drives the turnover cutting piece to rotate towards the conical tip. A limiting part is arranged on the hammer head or the rotating shaft and used for limiting the unfolding angle of the overturning cutting piece. The overturning cutting piece is provided with a retracting position and an unfolding position, the overturning cutting piece is attached to the hammer head at the retracting position, the torsional spring stores energy, and the overturning cutting piece abuts against the limiting part and is unfolded towards the conical tip at the unfolding position. A cutting edge and / or a hook part are / is arranged on the side, away from the conical tip, of the overturning cutting piece. The elastic overturning cutting piece is automatically unfolded after penetrating through the glass, the glass and the adhesive film can be efficiently pulled, cut and broken when the elastic overturning cutting piece is pulled back, the structure is simplified, machining is easy, operation is convenient and fast, and the automobile emergency escape device is suitable for automobile emergency escape.

The invention provides a high-current pulse injection type contact resistance monitoring type grounding rod which comprises a glass steel pipe with one end sleeved with an insulating handle and the other end fixed with a hook, a groove is formed in the inner side wall of the hook, a conductive tongue and an insulating tongue which are arranged in a spaced mode are arranged on the inner side of the hook in a back-to-back mode, and placement grooves are formed in the inner sides of back arches of the conductive tongue and the insulating tongue. A piezoresistive sensor is arranged in the placement groove or the groove and connected with one elastic arm of a double-torsion spring located between the placement groove and the groove in a pressing mode, the other elastic arm of the double-torsion spring is pressed in the groove in the inner side of the hook or the placement groove, a bent groove is formed in the outer side of the back arch of the insulation tongue, and a copper plate is fixedly embedded in the bent groove. In a non-working state, the copper plate is not in contact with the conductive tongue, and a monitoring box is further arranged on the glass reinforced plastic pipe. The high-current pulse injection mode is adopted to monitor the contact resistance between the grounding rod hook and the conductor to be grounded, monitoring is more direct, and under mutual cooperation of contact pressure detection, contact state feedback is clear.

The invention discloses a multi-dose injection pen, and relates to the technical field of medical instruments, the multi-dose injection pen comprises a pen body, a dose adjusting assembly and a driving assembly, the dose adjusting assembly and the driving assembly are installed in an inner cavity of the pen body, a dose indicator is rotated when injection dose is adjusted, dose readings on the outer surface of the dose indicator directly face a reading window, and a sleeve rotates synchronously. Further, the torsion of the torsion spring is increased, and pre-stress is accumulated for injection; during injection, the driving assembly is pressed in the axial direction, the torsion of the torsion spring is released, and the torsion spring recovers to the initial torsion state after a set medicine dosage is injected; the torsion spring comprises the first spiral section and the second spiral section, one end of each spiral section is connected to the shell cover, the other end of each spiral section is connected to the sleeve, compared with a traditional structure, larger torsion can be generated when the torsion spring rotates by the same angle, and the number of rotation turns needed by the torsion spring with the same prestressing force is reduced.

The utility model discloses a defect detection device for the surface of a metal pipeline part, and relates to the technical field of pipeline detection.The defect detection device comprises a detection device body and a self-patrol detection mechanism, the self-patrol detection mechanism is arranged below the detection device body, and the self-patrol detection mechanism comprises a clamping moving assembly installed at the bottom end of the detection device body; detection pressing assemblies are installed on the front side and the rear side of the detection device body. Auxiliary moving wheels are driven by electric control lifting rods to be adjusted up and down, after the auxiliary moving wheels are descended to the two sides of a pipeline, the auxiliary moving wheels are driven by electric control telescopic rods to clamp the pipeline, the moving stability of the device is improved, and then the device is driven to move on the pipeline through rotation of electric control driving wheels; meanwhile, the pipeline is continuously detected when the ultrasonic detection probe integrally moves, and then downward rotating torsion is provided for the detection pressing rod through the torsion spring shaft, so that the detection pressing rod can be stably pressed on the pipeline, and the stability of pipeline detection is ensured.

The invention discloses a compact five-degree-of-freedom teleoperation hand of a series-parallel structure and a control mapping method of the compact five-degree-of-freedom teleoperation hand. The teleoperation hand comprises a base, a wire guiding device, a fixing sleeve, a rotary encoder, a driving arm, a spherical hinge butt joint device, a driven arm, a torsional spring, a movable platform, a front-end operation series connection platform and two angular displacement sensors. The rotary encoder is fixed to the wire guiding device through the fixing sleeve and used for measuring the rotation angle of the driving arm in real time. One end of the driving arm is fixedly connected with a rotor of the rotary encoder, and the other end of the driving arm is hinged with one end of the driven arm; the other end of the driven arm is hinged to the movable platform, and the two angular displacement sensors are used for measuring the pitch angle and the yaw angle of a handle of the front-end operation series platform. The front-end operation series platform is hinged to the movable platform and used for adjusting the posture of the teleoperation hand. The device is simple and compact in structure, low in cost and small in size; through combination of series connection and parallel connection, the rigidity requirement is guaranteed, and meanwhile the flexibility of the device is guaranteed.

A closure device for a container that defines a neck and an annular flange. The closure device comprises a cap body, a tamper evidence (TE) band positioned below the annular flange, a tongue that extends from the cap body towards the tamper evidence band and first and second leashes positioned on either side of the tongue. The first and second leashes connect the cap body to the tamper evidence (TE) band, and allow the cap body to be removed from the neck of the container while remaining attached to the tamper evidence (TE) band. When the cap body is actuated to a fully open position the first and second leashes act as a torsion spring for causing the tongue to exert a force against the neck of the container for retaining the cap body in the fully open position.

An electronic lockbox uses a rotary actuator with multiple positions to achieve multiple locking states. Multiple positions of the actuator are detected, using optical sensors. The locking mechanism includes an outer sleeve and an inner cylindrical barrel that are coupled with torsion springs. The lockbox has a shackle and a key bin that are retained by the inner barrel when in the locked state, and the barrel can be rotated to either release the shackle or to release the key bin that typically holds a building's key.

This invention discloses a scraper-type permanent magnet synchronous electromagnetic pump. The pump body has a pump chamber with an opening at one end. An end cover is sealed and fixed to the opening end of the pump chamber. A cam rotor is installed in the pump chamber. The rotating shafts at the front and rear ends of the cam rotor are rotatably connected to the end cover and the pump body, respectively. One end of the upper scraper and the lower scraper are fixed to the inner wall of the pump chamber by upper and lower torsion springs, respectively, dividing the pump chamber into a low-pressure chamber on the left and a high-pressure chamber on the right. The upper and lower torsion springs apply a spring force pointing towards the axis of the cam rotor to the upper and lower scrapers, respectively. The volume of the low-pressure chamber is larger than that of the high-pressure chamber. A winding is embedded in the inner wall at the bottom of the pump chamber or the inner surface of the end cover. Correspondingly, a pair of permanent magnets is embedded in the end face of the cam rotor near the winding. When the cam rotor rotates, the upper and lower scrapers swing, and their free ends always press against the outer circumferential surface of the cam rotor, scraping the fluid on the surface of the cam rotor. The cam-blade rotor, in cooperation with the upper and lower scrapers, improves the overall stability.

The invention discloses a space false target system based on an inflatable structure and a deployment method thereof. Relates to the technical field of spacecraft protection, and the system comprises a load cabin and a storage cabin, the storage cabin is internally provided with a camouflage module, and the load cabin is internally provided with an inflation module used for inflating the camouflage module, a power supply module used for supplying power and a posture regulation and control module used for controlling the posture; the storage cabin is composed of a plurality of folding plates and can be automatically unfolded so as to release the camouflage modules in the storage cabin. According to the deployment method, satellite release is carried out along with the following steps of attitude adjustment, inflation and the like. Rapid unfolding is achieved through the folding type storage cabin and the torsional spring hinge, rapid deployment and stable control are achieved in combination with the inflation module and the posture regulation and control module, and the problems that a traditional system is complex in deployment, low in unfolding efficiency and insufficient in posture adjustment are solved; the system has the advantages of rapid deployment, compact structure, stable and reliable attitude and suitability for a dynamic space environment.

The invention relates to the technical field of conveying devices, and discloses an intelligent suspension conveying device for waterproof polyester fabric production, which comprises a support frame, the inner wall of the support frame is rotatably connected with an output shaft, the circumferential surface of the output shaft is fixedly connected with a delivery wheel, and the inner wall of the delivery wheel is in transmission connection with a chain. The front portion of the chain is fixedly connected with a fixing block, the bottom of the fixing block is fixedly connected with a fixing frame, the inner wall of the fixing frame is rotationally connected with a rotating rod through a torsional spring, and the inner wall of the rotating rod is slidably connected with a first elastic rod through a spring. Damage caused by cloth displacement is effectively avoided, the cloth is prevented from falling off accidentally in the conveying process, safety accidents caused by the fact that the cloth winds equipment or falls to a production area are avoided, and stable and safe operation guarantee is provided for intelligent automatic production.

An anti-accidental-touch chest drainage tube fixing device, which effectively solves the problems of existing chest drainage tubes, including an insufficient shock absorption and buffering effect, the lack of a mechanism for isolating external drainage-tube shaking, inconvenience for patients to get out of bed due to the absence of a temporary opening-closing and sealing mechanism, an insufficient anti-accidental-pulling mechanism, inadequate buffering capacity, and the lack of a self-sealing mechanism. The technical solution provided herein is an anti-accidental-touch chest drainage tube fixing device, comprising a self-adhesive patch (1) applied to a wound, and a drainage tube (2), wherein a rectangular box (3) is provided above the self-adhesive patch (1), a winding roller (4) is provided in the rectangular box (3), the ends of the winding roller (4) are articulated to side plates of the rectangular box (3) by means of torsion springs, and a cylindrical block (5) is provided in the middle of the winding roller (4); two transmission rollers (6) are provided on the lower side of the winding roller (4); two longitudinal shafts (7) are provided in the cavity of the rectangular box (3); a double-ended lead screw (8) is provided in the cavity of the rectangular box (3), and two sliders (9) are screwed on the double-ended lead screw (8); a gear (10) is provided at the right end of the double-ended lead screw (8), a swing rod (11) is provided on the self-adhesive patch (1), and a ring gear (12) is provided at the upper end of the swing rod (11); and an arc-shaped rack (13) with a downward opening is provided on the self-adhesive patch (1), and when the swing rod (11) drives the rectangular box (3) to swing back and forth, the gear (10) can rotate under the action of the rack (13).

This application relates to the field of sludge scraper technology, specifically disclosing a non-metallic chain-plate type sludge scraper, comprising: a chain; a power mechanism for driving the chain to rotate; a scraper plate including a fixed part and a movable part, wherein the fixed part is fixedly connected to the chain, and the movable part is rotatably connected to the side of the fixed part away from the chain, and a torsion spring connects the fixed part and the movable part; a mounting base fixedly disposed on the wall of a sedimentation tank; and a cleaning plate fixedly connected to the mounting base, wherein the cleaning plate is inclined, and the end of the cleaning plate away from the mounting base is used to abut against the scraping surface of the movable part, so that when the chain rotates, the cleaning plate pushes the movable part to rotate to one side until the cleaning plate disengages from the movable part, and the torsion spring drives the movable part to rotate to a state of abutting against the fixed part. The cleaning plate in this application can scrape off the sludge adhering to the scraping surface of the movable part, thereby preventing sludge accumulation on the movable part and helping to ensure the cleaning effect of the scraper plate on the sludge at the bottom of the tank.

The utility model provides a manual double-pull front cover lock which comprises an upper cover plate, the upper cover plate is matched with a lock body and a lock bottom plate to form a closed whole, a u-shaped notch is formed in the upper cover plate, and first through holes used for riveting a first installation shaft sleeve and a second installation shaft sleeve are formed in the two sides of the u-shaped notch respectively. A second through hole and a third through hole for mounting the pawl shaft and the ratchet shaft are formed below the first through hole; the ratchet shaft is sleeved with a ratchet through a ratchet lantern ring, the pawl shaft is sleeved with a pawl through a pawl lantern ring, and the ratchet is matched with a limiting hook of the pawl to lock the front cover. According to the utility model, the torsion spring is arranged inside, noise caused by resonance generated when the tension spring rebounds is avoided, the edges of the lock bottom plate and the upper cover plate are riveted with each other to form a closed whole, the internal structure is protected, the strength and durability of the lock body are enhanced, the structure is simple, and the service life is long.

A dynamic balance adjusting structure used for a tripod head is provided. The dynamic balance adjusting structure includes a main body arranged on a tripod head. One side of the main body is provided with a rotatable side cover, and the outer side of the side cover is provided with a rotatable knob. The main body is internally provided with an inner torsion spring seat, a first torsion spring and a second torsion spring are arranged between the inner torsion spring seat and the side cover, and inner ends of the first torsion spring and the second torsion spring are fixed on the inner torsion spring seat. The inner side of the side cover is provided with a first outer torsion spring seat and a second outer torsion spring seat which are rotatable, an outer end of the first torsion spring is fixed on the first outer torsion spring seat, and an outer end of the second torsion spring is fixed on the second outer torsion spring seat. The side cover is provided with a first substrate component and a second substrate component. According to the provided dynamic balance adjusting structure used for a tripod head, through the unique structure with double torsion springs, the gear can be selected, multi-gear balance force can be provided to achieve a better dynamic balance effect, and the operation is convenient.