40results about How to "Avoid dust" patented technology

The utility model discloses an overwater cast-in-place simply supported beam dismantling device which is suitable for the field of bridge dismantling. Comprising a buoyancy tank platform for providing overwater operation support and transportation in the overwater cast-in-place simply supported beam dismantling process, an SPMT module transport vehicle capable of adjusting the height of a vehicle body, a bracket with the bottom capable of allowing the SPMT module transport vehicle to enter, and a hydraulic lifting device with the height capable of being increased to a preset height so that the to-be-dismantled cast-in-place simply supported beam can be separated from a support. Compared with an existing blasting device or a floating crane dismantling device, the device has the advantages that modular design and assembly are efficient, the device can be repeatedly used for other bridge engineering, the construction cost is low, the whole beam body is dismantled through hydraulic synchronous jacking, chippings are prevented from polluting water, and environmental protection and construction safety are both achieved.

The utility model relates to a kind of vertical screw material cutting door mechanisms, including first pusher, the discharge pipe of the first pusher acting end, the material pipe being communicated with the discharge pipe, the moving piece of moving material evenly and the sealing piece of sealing or opening the discharge pipe;Discharge groove is opened in the discharge pipe;One end of the material pipe is communicated with the discharge groove, and other end is connected with bunker;The moving piece rotates in the discharge pipe;The bottom of the discharge groove is open in shape;The sealing piece is arranged on the discharge pipe, and the acting end of the sealing piece corresponds with the bottom of the discharge pipe.Solved movable gate by manual operation, its opening degree is controlled depending on operator experience, not only labor intensity is big, and discharge speed and flow are difficult to accurately control, it is extremely easy to lead to powder uneven discharge, affect the precision and efficiency of material packaging.

The utility model discloses a kind of feeding devices for light calcium production and manufacture, including in the lower part of base, and the lower opening of directly facing hopper placing cavity, is provided with protective structure. The protective structure mainly includes two symmetrically arranged collection plates;One end of collection plate is hinged to the bottom of base by hinged shaft. Hinged shaft is internally provided with torsion spring. The utility model in use, if there is scattered material falling into hopper placing cavity when hopper is in the process of rising, the scattered material falling is directly on the collection plate, the collection plate holds the material falling, avoids scattered material scattering;When the hopper empties material, again fall into hopper placing cavity, the bottom of hopper is against scattered material and moves downward, when moving a certain distance, collection plate is forced to open, material falls and is collected, to reduce falling distance, avoid dust raising, simultaneously avoid the problem that hopper cannot be placed.

The utility model relates to an engine fan dust-raising-preventing fan cowl device, an engine and a vehicle. A wind shield is connected to the side, facing the ground, of a fan cowl body and located on the peripheral side wall of a cowl ring of the fan cowl body. In the axial direction of the cover ring, the side, close to the fan, of the wind shield extends in the axial direction to form a wind shielding area, the projection, in the axial direction of the cover ring, of the fan is located in the wind shielding area, air generated by rotation of the fan and blown to the ground is blocked, and waste soil, dust, dust, catkin and other easily-drifting objects on the ground are prevented from being blown up. And meanwhile, a protection effect is achieved, and the dust raising phenomenon of the whole vehicle is avoided.

A moving frame is connected in a hollow brush handle in an up-down sliding mode, bristles are arranged at the upper end of the moving frame, a rotating frame capable of rotating in the brush handle is connected below the moving frame in a rotating mode, a blocking portion for blocking the rotating frame from moving downwards is arranged in the brush handle, and a through hole is formed in the blocking portion. The rotating frame is provided with a projecting shaft which penetrates through the through hole and extends below the blocking part, a knob connected with the projecting shaft is arranged below the brush handle, the rotating frame is provided with a rotating shaft, the moving frame is provided with a sleeve arm, the rotating shaft is provided with a groove which is obliquely arranged from top to bottom along the outer surface of the rotating shaft, and the inner side of the sleeve arm is provided with a convex point which protrudes inwards in the groove. The protruding point is matched with the groove and moves along the groove to drive the moving frame to slide upwards or downwards in the brush handle when the rotating shaft rotates, the moving frame and the bristles are located in the brush handle when the protruding point is located at the lower end of the groove, the moving frame drives the bristles to extend upwards to the upper portion of the brush handle when the rotating shaft rotates to enable the protruding point to move towards the upper end of the groove, and the toothbrush is simple in structure and convenient to use.

This invention provides an automated feeding device for food seasoning production, relating to the technical field of conveying and feeding equipment. It includes: a tilting support plate; two downward-supporting mounting rods, perpendicularly welded to the tilting support plate, are symmetrically arranged on both sides of the middle portion of the tilting support plate; two rod sleeves are symmetrically slidably mounted on the two mounting rods; a collar is welded to the bottom end of each rod sleeve; a large-diameter tension roller is rotatably mounted between the two collars; two small-diameter tension rollers are symmetrically rotatably arranged on both sides of the large-diameter tension roller; and two tensioning wheels are symmetrically rotatably arranged above the space between the two small-diameter tension rollers and the large-diameter tension roller; the lower layer of the skirt conveyor belt passes through the small-diameter tension rollers, tensioning wheels, and large-diameter tension rollers. This invention can shake off and clean the material adhering to the bottom skirt conveyor belt placed at the bottom of the tilting support plate after unloading, preventing the adhering material from falling from the bottom skirt conveyor belt and causing dust and waste.

The invisible fan lamp comprises a circular-truncated-cone-shaped fan base, a fan motor and fan blades are fixed to the top face of the circular-truncated-cone-shaped fan base, and a center light source plate and a circular lampshade are fixed to the bottom face of the circular-truncated-cone-shaped fan base. An annular lifting air guide table is further arranged, and a horn-shaped convex cylinder is integrally formed on the inner wall of the annular lifting air guide table; a lifting driving structure is arranged between the edge of the circular-truncated-cone-shaped fan base and the annular lifting air guide table; the side wall of the horn-shaped protruding cylinder is provided with a lifting receding groove hole. An annular air outlet is formed between the edge of the circular-truncated-cone-shaped fan base and the inner wall of the horn-shaped protruding cylinder. The lifting driving structure drives the circular-truncated-cone-shaped fan base to ascend and descend, and the size of the annular air outlet is changed. The fan is reasonable in structural arrangement, the lifting driving structure drives the circular-truncated-cone-shaped fan base to ascend and descend, the size of the air outlet is adjusted, adjusting operation is convenient and fast, cleaning and maintaining operation is convenient, and the blowing requirements of different air volumes can be met.

The utility model discloses a district wheel hub driving motor protection structure system meeting IP requirements, which comprises a casing, a support arm arranged on the top of the casing, an end cover arranged between the casing and the support arm and arranged on the lower portion of the support arm, an aluminum support fixedly arranged on the inner side of the end cover, and a rotating shaft arranged in the middle of the casing. The upper and lower ends of the rotating shaft are respectively sleeved with a front-end bearing and a rear-end bearing. The utility model has the beneficial effects that a first heavy labyrinth structure full of grease is formed between the oil storage tank of the aluminum bracket and the groove on the back surface of the end cover, and a second heavy labyrinth is formed between the annular upright post of the supporting arm and the annular upright post of the end cover, so that the grease in the first heavy labyrinth cannot be damaged by splashed water, and the dustproof and waterproof effects are further achieved.

The hidden fan lamp comprises a circular-truncated-cone-shaped fan base, a fan motor and fan blades are fixed to the top face of the circular-truncated-cone-shaped fan base, and a center light source plate and a circular lampshade are fixed to the bottom face of the circular-truncated-cone-shaped fan base. An annular lifting air guide table, a mounting seat, a control motor, a transmission screw rod and a sliding block body are further arranged; a horn-shaped protruding cylinder is integrally formed on the inner wall of the annular lifting air guide table, and a lifting receding groove hole is formed in the side wall of the horn-shaped protruding cylinder. An annular air outlet is formed between the edge of the circular-truncated-cone-shaped fan base and the inner wall of the horn-shaped protruding cylinder. The mounting seat is fixed on the annular lifting air guide table, and the sliding block body is fixed on the circular-truncated-cone-shaped fan seat and is in threaded connection with the transmission lead screw. The fan is reasonable in structural arrangement, the motor, the transmission lead screw and the sliding block body are controlled to be matched, the circular-truncated-cone-shaped fan base ascends and descends in the horn-shaped protruding cylinder, the size of an air outlet is adjusted, the overall appearance attractiveness can be improved, and the air blowing requirements of different air volumes are met.

This utility model discloses a pulse backflushing cleaning device, relating to the field of pulse cleaning technology. It includes a housing and an isolation plate, the isolation plate being fixedly connected inside the housing and dividing the housing into upper and lower parts. The portion of the housing located at the top of the isolation plate is configured as a clean air chamber. This pulse backflushing cleaning device is equipped with an air supply structure. When high-pressure gas enters the impact tube, the gas inside the impact tube will be discharged to the outside of the impact tube through multiple vents. The gas discharged through the vents will pass between two guide plates, which guide the gas discharged from the impact tube. This ensures that the downward angle of the gas flow after exiting the impact tube forms an acute angle with the impact tube, allowing the gas to impact the dust on the outside of the filter cartridge at a certain angle during the impact process inside the filter cartridge, thereby improving the dust removal effect of the pulse gas.

The utility model discloses a kind of material supplementing device of intermittent ball mill, switch cover is installed at the feeding opening of ball mill by bolt, the upper portion of ball mill is provided with operating platform, material conveyor, water replenishing pipe and crane of slurry discharger, material conveyor is installed with downcomer, operating platform is provided with the operating port of switch cover for facilitating assembly and disassembly, quick coupling is provided on the downcomer with water replenishing pipe, the lower portion of downcomer is also connected with telescopic pipe that can be inserted into the feeding opening of ball mill;The utility model has the beneficial effect that: in the process of feeding, water and material enter the new downcomer after improvement simultaneously, and enter the inside of ball mill along telescopic pipe, not only eliminate dust, but also eliminate the possible material jamming phenomenon of original downcomer.

This utility model provides a three-proof, fully enclosed frequency converter, belonging to the field of frequency converter technology. It includes a protective assembly comprising a base, a housing fixedly connected to the end of the base, a flange plate fixedly connected to the side wall of the housing, and a cover plate fixedly connected to the side wall of the flange plate. The frequency converter assembly includes a heat sink fixedly connected to the middle of the housing, fins adapted and installed on the side wall of the heat sink, a frequency converter main unit fixedly connected to the middle of the heat sink, and an operation panel adapted and installed on the side wall of the frequency converter main unit. The advantages of this utility model are: it can resist high-intensity water spray and dust intrusion, making it suitable for humid and dusty industrial environments. The explosion-proof design meets the requirements for use in hazardous areas, and the explosion-proof glass plate and explosion-proof switch ensure safe operation in flammable and explosive environments. The frequency converter maintains good heat dissipation performance even in a fully enclosed state, extending the service life of electronic components. Operation and monitoring can be performed without opening the cover plate, reducing maintenance time and risks.

This utility model discloses a toner separation device, including a screening chamber. A first fixing ring is welded to the surface of the screening chamber, a spring is welded to the bottom of the first fixing ring, a second fixing ring is welded to the other end of the spring, a support leg is welded to the bottom of the second fixing ring, a vibration motor is welded to the bottom of the screening chamber, a filter screen is installed inside the screening chamber, and a discharge pipe is fixedly connected to the bottom of the screening chamber. This toner separation device, by welding a first fixing ring to the surface of the screening chamber and a spring to the bottom of the first fixing ring, with a second fixing ring welded to the other end of the spring and a support leg welded to the bottom of the second fixing ring, ensures that the toner is contained within a sealed space during use. Furthermore, the funnel-shaped inlet and discharge pipe prevent toner from generating dust or overflowing outside the device, making it very convenient to use.

This utility model relates to the field of louvers, specifically a sliding curtain wall ventilation louver device. It includes a window frame, ventilation opening, rotating shaft, flip-up baffle, driven gear, sliding groove, rack, filter frame, filter screen, and placement slot. Using this utility model, air can be purified while keeping the ventilation opening open, significantly reducing the rate of indoor dust accumulation and decreasing daily cleaning workload.

The utility model discloses a special vehicle hydraulic folding roof, including car, two roof and two oil jar, the front end surface of car is fixed with two oil jar base, characterized by: two oil jar all drive two roof to open and close through triangular block connecting arm, and the triangular block connecting arm is triangle shape, when the roof is in the closed state: two triangular block connecting arms are arranged in the splay shape on the front end surface of car, and the top corner of the lowermost triangular block connecting arm is hinged on the front end surface of car through the lower pin shaft, and the top corner of the uppermost triangular block connecting arm is hinged with the inner end of roof through the upper pin shaft, and the top corner of the middle part of triangular block connecting arm is hinged on the oil jar cylinder rod of oil jar through the middle pin shaft. The utility model discloses a special vehicle hydraulic folding roof, and the oil jar drives the roof to open and close through a triangular block connecting arm, and compared with the driving structure of the structure of multiple links of the prior art, has the advantages of simple structure, stable and reliable and not easy to damage.

The application discloses a mine exploitation drilling machine with a drilling direction guiding device, and belongs to the technical field of mine exploitation equipment. The mine exploitation drilling machine comprises a first guiding device and a second guiding device. The first guiding device comprises a first guiding rod, and a fiber torque sensor and a guide bead are mounted on the inner wall of the first guiding rod. The second guiding device comprises a second guide rod, one end of the second guide rod is fixedly connected with a rotating ball, the other end of the second guide rod is provided with a blocking ring, a guide sleeve is sleeved on the second guide rod, sliding grooves are uniformly distributed on the outer side of the guide sleeve, first sliding blocks are arranged in the sliding grooves, and the first sliding blocks are hingedly connected with first hydraulic cylinders. The mine exploitation drilling machine with the drilling direction guiding device is provided, the first direction guiding device and the second direction guiding device are arranged to guide the drilling direction, the second hydraulic cylinder and the third hydraulic cylinder are arranged to adjust the initial drilling angle of the drilling machine, the dust collecting cover and the dust collecting box are arranged to prevent dust raising, and the water mist spraying system can form larger particle groups from dust particles.

The application discloses a kind of feed equipment with filtering function for rare earth polishing powder production, including feeding assembly, filtering assembly is installed in the feeding assembly, the feeding assembly includes outer cylinder, first clamping part is installed on one end of the outer cylinder, the filtering assembly includes inner cylinder, first clamping piece is installed on the outer side surface of the inner cylinder.The application is provided with feeding assembly, filtering assembly, driving assembly and lifting assembly, so that the feed equipment has two working conditions of filtering feed and discharging unqualified material according to different inclination states, so it can not only filter and screen rare earth material according to particle size, but also further process unqualified material by means of reprocessing cylinder during filtering and screening process, improve processing efficiency, and finally discharge the remaining unqualified material conveniently.

The application discloses a kind of intelligent uniform soil test device and use method, device includes soil mixing box, bulldozer equipment, moisture content soil mixing equipment, water pump, modifier soil mixing equipment, modifier delivery pump, vibrating base and intelligent control system, bulldozer equipment, moisture content soil mixing equipment and modifier soil mixing equipment are located inside soil mixing box;Soil mixing box is fixed on vibrating base;Soil mixing box is divided into moisture content soil mixing area, modifier soil mixing area and connecting area in, moisture content soil mixing area upper portion is equipped with soil inlet, modifier soil mixing area front side is equipped with soil outlet, lower rear side is equipped with bulldozer equipment, connecting area is respectively provided with water pump pipe and modifier pump pipe, water pump pipe and moisture content soil mixing equipment are communicated in connecting area;Modifier pump pipe and modifier soil mixing equipment are communicated in connecting area.It can greatly improve single soil mixing quality, save manpower, material resources and financial resources, guarantee soil mixing uniformity, improve test accuracy, improve laboratory environment, and ensure the health of test personnel.

This invention discloses a dust-proof and environmentally friendly construction waste recycling device in the field of construction waste recycling technology. It includes a magnetic mechanism and a crushing mechanism inside the outer shell. The crushing mechanism includes a cylindrical lifting block with multiple open cylindrical lifting block grooves at its bottom. The magnetic mechanism includes a cross-shaped magnetic suction frame. Both the lifting block grooves and the cross-shaped magnetic suction frame have independently controlled electromagnets built into them. This invention uses the magnetic suction mechanism and the crushing mechanism to lift and drop the cylindrical lifting block onto the concrete, effectively crushing it. Then, by raising the cross-shaped magnetic suction frame from the cylindrical lifting block and rotating it, the top layer of concrete is dispersed, and metal waste in the concrete is adsorbed layer by layer. This process is repeated until all the metal waste in the concrete is adsorbed, solving the problem of separating concrete and metal waste through crushing.

The utility model relates to packing machine technical field, and disclose a kind of jujube powder automatic screening packaging machine, including powder packing main body, spiral feeding mechanism, screening mechanism, powder mechanism and raw material bin.Using this structure, through the linkage of each component, the storage, feeding, screening, coarse powder crushing, packaging and other processes of jujube powder are realized, manual intervention is reduced, labor intensity is reduced, and production efficiency is improved;At the same time, each component is directly connected, and the closed conveying mode is used to prevent jujube powder from contacting the external environment, avoid jujube powder from being contaminated and dust, and improve product quality;And the jujube powder that does not meet the screening requirement will be crushed by the powder mechanism and then fed into the raw material bin again, ensuring the circulation of the product and avoiding waste of jujube powder.

The utility model discloses a kind of screening devices of tungsten molybdenum powder production convenient cleaning, including box, material duct and material box and matching mouth are distributed through, the rear side edge of the box is equipped with connecting hinge, and the other side of connecting hinge is installed with maintenance cover plate, the other side of maintenance cover plate rear side is installed with locking knob, the lower end of the front side of the box is fixedly connected with ramp. This kind of screening device of tungsten molybdenum powder production convenient cleaning can be double set stable feeding by material duct and auger, and can be adapted to close by closing cover and matching mouth, avoid dust raising, and can be completely matched sweep by brush and second rotating motor to screen mesh, screening effect is better, and screen mesh is independently pulled out and disassembled by positioning pull-out slot, positioning pull-out block, impurity is cleaned conveniently, and maintenance cover plate can be opened as a whole by connecting hinge, it is convenient to clean and use inner wall, more use.

The utility model relates to drying equipment technical field, concretely is a kind of drying oven for newborn alpaca, including main body: main body, the front side of main body is equipped with door, and door front is equipped with handle;The device passes through drying machine and air outlet pipe, when hot air enters the inside of air outlet pipe, the hot air of this time passes through the inside of compression plate, and hot air can be compressed by the compression plate being set as wide in two ends and narrow in middle, and the hot air after compression forms rapid discharge to the body of alpaca, and then can carry out drying effect to the wool inside the body of alpaca.

This invention provides a solid-liquid composite adsorbent for carbon dioxide capture, its preparation method, and its application, specifically relating to the field of carbon dioxide capture materials technology. The solid-liquid composite adsorbent of this invention includes a shell and a core; the shell comprises hydrophobic SiO2 and hydrophobic modified biochar; the core is an acidic gas absorbent. This invention utilizes a unique solid-liquid structure to combine the high specific surface area and low corrosivity of the solid adsorbent with the high adsorption capacity and high selectivity of the acidic gas absorbent, thereby improving the adsorption capacity of the adsorbent; by using a hydrophobic solid particle shell to encapsulate the acidic gas absorbent core, the contact area between the acidic gas absorbent and the capture equipment is reduced, preventing corrosion of the equipment by the acidic gas absorbent. As shown in the examples, the solid-liquid composite adsorbent provided in this application has a CO2 adsorption capacity of 1.5–5 mmol / g.

This utility model relates to the field of powder metallurgy equipment technology, and in particular to a magnesium oxide powder tableting device, including a base, with an operating table fixedly connected to the top of the rectangular base; it also includes a mold hole, with a mold hole circumferentially formed near the center of the top of the operating table, a spiral groove formed on the inner wall of the mold hole, and a dust outlet hole formed at one end of the spiral groove near the bottom of the mold hole, the dust outlet hole connecting to a dust collection tank along the radial direction of the operating table, the dust collection tank being located on the upper part of the operating table surrounding the mold hole; compared with traditional magnesium oxide powder tableting devices, this utility model adds a dust collection mechanism, effectively reducing the escape rate of magnesium oxide powder during tableting, reducing production costs, and utilizing the dust outlet hole to allow dust of different particle sizes to pass through, effectively preventing dust from being generated by the tableting device itself, eliminating the need for external equipment, reducing the size of the tableting device, and lowering manufacturing costs, and by adding a micro heat pipe, effectively preventing the high-temperature phase transformation of magnesium oxide powder during tableting.

The utility model discloses a half bare formula screw conveyor belongs to dust transport technical field, including screw conveyor and half bare shell, the half bare shell is arc, the arc boundary department of half bare shell is provided with shielding device, the shielding device includes connecting plate and light shielding board, the connecting plate fixed setting in the arc boundary department of half bare shell, light shielding board with connecting plate swing joint. The middle part of connecting plate is provided with the groove and the suspension strip of intercommunication, the suspension strip sets up the top of groove. The top of light shielding board is provided with the lug, the lug inserts the groove and the suspension strip department of connecting plate. The utility model uses above -mentioned structure, solves the problem that the dust is big in the process that current utilizes the conveyer belt to scatter powder, and it is difficult to scatter the even powder under, utilizes the rotation blade of screw to push and lets the powder move upwards, and under the double effect of centrifugal force and gravity, evenly scatters the powder.

The present application relates to the technical field of mechanical transmission, and particularly relates to a tongue joint type low-friction and low-dust drag chain link unit, a first connecting part of the link unit is suitable for being inserted into a second connecting part of an adjacent link unit; the first connecting part and the second connecting part are both provided with a pivot passage for a flexible connecting pivot to pass through, and a limiting protruding structure limits the rotation center between the link units to the axis of the flexible connecting pivot; a non-contact avoidance gap is formed between the first connecting part and the second connecting part, when being bent, the adjacent link units rotate around the flexible connecting pivot clamped by the radial limiting protruding structure as the only rotation center; when the first connecting part rotates in the second connecting part, the outer wall surface of the first connecting part always keeps a non-contact state with the inner wall surface of the second connecting part, the design converts the traditional'surface contact friction' into 'point contact friction' and introduces a non-contact avoidance gap, thereby significantly reducing the particulate matter generated due to mutual extrusion and friction between the link bodies and reducing the operation noise.

The utility model discloses an edge grinding device for plastic tableware processing, including edge grinding support, dust collecting room and the edge grinding machine of right end before and after of dust collecting room, and the right end of edge grinding support is provided with spacing unit, and is constituted by the edge grinding support platform of rotation in the right upper end of edge grinding support and the pressing piece of setting on the upper end of edge grinding support platform, the left upper end fixed connection of edge grinding support has dust collecting room, and the left side of dust collecting room is equipped with the suction fan of installing, and the middle part of dust collecting room is equipped with the dust screen of inserting and installing. The edge grinding device for plastic tableware processing, through the setting of spacing unit, can be stable and tightly fixed to the rotation of plastic tableware, improve the stability of plastic tableware in the edge grinding process, and can prevent the plastic tableware from being pressed and deformed in the process of pressing, and the setting of dust collecting room, suction fan and dust screen, the dust generated in the edge grinding process is collected and cleaned, and dust raising is avoided.

The utility model discloses a hot melting kettle device for hot melting road marking, which comprises a hot melting module, the hot melting module comprises an outer shell, an inner kettle body, a stirring mechanism and a heating mechanism, the hot melting kettle device also comprises a material storing and feeding module, the material storing and feeding module comprises a material storing box and a feeding machine, the material storing box is internally provided with a material storing bin, the top of the material storing bin is provided with a feeding port, and the feeding machine is provided with a feeding port. The bottom of the storage bin is communicated with the lower portion of the corresponding feeding machine, a butt joint opening is formed in the upper portion of the outer shell and is in butt joint with the feeding machine, the inner kettle body is arranged in the outer shell, an output opening is formed in the rear portion of the outer shell, and the inner side of the output opening is communicated with the inner kettle body; the door opening and closing assembly comprises a door frame, a door plate and a driving mechanism, the door frame is fixedly arranged at the output port of the outer shell, the door plate movably abuts against the output port, the door plate is driven to be opened and closed through the driving mechanism, and the power module comprises a diesel engine, a generator, an oil pump and a flow control valve and is controlled by the controller.

This invention relates to the field of feeding equipment technology, specifically to an adjustment device for a high-density integrated circuit lead frame reel. It includes a support shaft, with a sleeve fitted around the outside of the support shaft to support the reel. The sleeve is divided by a limiting plate and a clamping element. The clamping element is detachably fitted over the sleeve. The sleeve and the limiting plate are fixed to each other. The limiting plate and the sleeve can move axially along the support shaft and are circumferentially limited. A rotatable adjusting element is provided at the outer end of the support shaft. The adjusting element is axially restricted within the support shaft and is threadedly connected to the sleeve. Rotating the adjusting element causes the sleeve and the limiting plate to move axially along the support shaft, preventing the material strip on the reel from scraping against the limiting plate and avoiding dust and deformation problems. Even without stopping the machine, the position of the limiting plate can be finely adjusted via the adjusting element, making adjustment convenient and simple. Furthermore, the adjusting element is located at the outer end of the support shaft, providing greater operating space.