174results about How to "Normal rotation" patented technology

The invention discloses a pipe robot. The pipe robot comprises a bracket, at least two driving devices rotationally arranged on the bracket, and a controller fixedly arranged on the bracket; each driving device is divided into three sections in the length direction, and comprises a driving drum and driving rollers arranged at the two ends of the driving drum; the driving rollers arranged at one ends of the driving drums are Mecanum wheels, and the driving rollers arranged at the other ends of the driving drums are Mecanum wheels or wheels; the driving drums comprise inner cylinders, outer cylinders rotationally sleeving the inner cylinders, and shells fixedly arranged at the externals of the outer cylinders; spiral blades are fixedly arranged on the outer peripheral surfaces of the shellsin the length directions; motors are fixedly arranged in the inner cylinders; and at the lower ends of the driving devices, the lower edges of the spiral blades are higher than the edges of the Mecanum wheels and the wheels. The motors are fixedly sealed in the inner cylinders to achieve good waterproof performance; the inner cylinders and the outer cylinders are rotationally connected through first connecting pieces and second connecting pieces; and the shells with the spiral blades sleeve the outer cylinders.

The invention provides a hinge assembly for a refrigerator. The hinge assembly comprises a first hinge structure and a second hinge structure, a first hinge shaft is arranged at the first end of the first hinge structure and used for being connected to a rotating shaft hole of a door body, a first through hole penetrating through the first hinge shaft along the axis of the first hinge shaft is formed in the first hinge shaft and used for allowing part of pipelines connected with the door body or a refrigerator body to penetrate, and the second end of the first hinge structure is used for beingfixed to the refrigerator body; the second hinge structure comprises a base and a connecting part which are used for being fixed to the refrigerator body, wherein the first end of the connecting partis provided with a second hinge shaft, the second hinge shaft is used for being connected to a pipe inlet hole formed in the door body, a second through hole penetrating through the second hinge shaft along the axis of the second hinge shaft is formed in the second hinge shaft and used for allowing the other part of pipelines connected with the door body or the refrigerator body to penetrate, andthe second end of the connecting part is connected to the base and configured to slide along the base when the door body rotates around the first hinge shaft. The pipelines penetrate into the door body from the refrigerator body of the refrigerator through the two hinge structures correspondingly, and thus the technical problem that the pipelines difficultly enter the door body simultaneously from one hinge structure is solved.

The invention relates to a turning and milling composite functional unit for a numerical control machine, in particular to a modularized B-axis turning and milling composite functional unit, which comprises a B-axis module and a turning and milling head module, wherein the B-axis module comprises a driving device, a three-fluted-disc indexing structure and a brake structure, the turning and milling head module comprises a motor driving device and a three-fluted-disc fixing device, the turning and milling head module id driven by a built-in motor, and is provided with a three-fluted-disc locking structure, during turning, three fluted discs are locked to ensure structure rigidity, during milling or drilling, the three fluted discs are loosened, and a main shaft rotates to drive a cutter to carry out processing. The B-axis module is driven by the built-in motor, during indexing processing, the three-fluted-disc locking structure is adopted to ensure the structure rigidity and the indexing accuracy; and during processing at any angle, the brake mechanism is adopted to ensure the processing rigidity. The B-axis module and the turning and milling head module are connected through screws, and according to processing requirements, different turning and milling heads are replaced so as to expand processing capability.

The invention discloses a waveguide switch with a heat dissipating device, and aims to effectively solve the problem of heat dissipation when the waveguide switch transmits high-power radio frequency signals. The heat dissipating device comprises an inner ring, an outer ring and a heat dissipating wire. The heat dissipating device is mounted at the bottom of the waveguide switch, can quickly transmit heat generated by high-power radio frequency signals to an outer casing of a guided stator of the waveguide switch, effectively reduce the temperature difference between a guided rotor and the guided stator, and avoid rotational failures of the waveguide switch, due to expansion of parts caused by over temperature. The waveguide switch provided by the invention has the advantages of simple structure and light weight, unnecessary nonmetallic materials are not used, the heat dissipation potential of the waveguide switch under high-power working conditions is effectively improved, and the overall high-power reliability of the waveguide switch is improved.

The prevention discloses a vertical disk plastic injection molding machine and includes a dial device, an injection device and a molding device. The dial device comprises a rotary disk and a drive device driving the rotation of the rotary disk. The injection device comprises an injection rack and a vertical preplasticizing device, an injection fuel tank and an injection head arranged on the injection rack. The molding device comprises a molded rack and a molded fuel tank positioned on the molded rank and under the disk. A molded fuel tank piston can be moved up and down. The molded fuel tank piston and the injection head is fixedly connected through the injection rack. The molded fuel tank piston drives the injection head to do the up-and-down movement through the injection rack. The invention can reduce a travel path of the molded fuel tank piston, reduce the travel time and thereby, and effectively enhance the production efficiency.

The invention relates to a rotary lifting parking device and an operation method thereof. The rotary lifting parking device comprises a fixed base assembly used for supporting the whole device. A swing rod lifting mechanism used for rising and falling is mounted at one end of the fixed base assembly, and a parking supporting plate device capable of rotating is mounted at the top of the swing rod lifting mechanism in a supporting mode. A rotary power device used for driving the parking supporting plate device to rotate is mounted at the connected position of the parking supporting plate deviceand the swing rod lifting mechanism. A triangular supporting mechanism used for supporting swing rods is mounted between the two swing rods of the swing rod lifting mechanism and fixedly mounted on the fixed base assembly. The swing rod lifting mechanism is connected with a winch mechanism used for driving the swing rod lifting mechanism to rise and fall. The rotary lifting parking device can be placed on the two sides of a road and does not occupy the lane space.

A horizontal disc type injection moulding machine is composed of a rotary disc unit, a injection moulding unit and a mould closing unit. Said injection moulding unit consists of a horizontal injection part and an injection jointer for allowing the fused plastic fluid to flow through it. Said mould closing unit comprises and mould closing cylinder with piston moving up and down, and an injection head fixed to the lower end of said piston for injecting the fused plastic fluid into moulding cavity of mould.

The invention discloses a mooring pipe. The shapes of an inner-layer shell and an outer-layer shell of the mooring pipe are manufactured through simulating the outline curve of a goose egg, steel balls serving as rollers in a friction reducing device are embedded between the inner-layer shell and the outer-layer shell, and the steel ball rollers are lubricated. The mooring pipe of the structure has the advantages of being smaller in size, free from reinforcing ribs, good in mechanical property and the like, and the mooring pipe is internally provided with a mechanism used for reducing the friction between the mooring pipe and a mooring rope, and the mechanism can be lubricated.

The invention belongs to the field of household electrical appliances and particularly provides a fine adjustment method for the position of an inner drum of an open-top type clothes treatment device.The method aims at solving the problems that since clothes in the inner drum is too heavy at the beginning of laundering in an open-top type roller washing machine, stress is performed on the side face of a spring bolt of a positioning lock and correspondingly the spring bolt cannot be retracted. In order to solve the problems, the fine adjustment method mainly includes the following steps of judging whether or not the spring bolt is retracted for the first time; if not, making the inner drum clockwise rotate by a first angle; judging whether or not the spring bolt is retracted for the secondtime; if not, making the inner drum counterclockwise rotate by a second angle. According to the steps above, when the spring bolt is retracted, the inner drum is allowed to rotate normally, and thusthe open-top type roller washing machine is allowed to start a washing program. By means of the fine adjustment method, the situation that stress is performed on the side face of the spring bolt and correspondingly the spring bolt cannot be retracted since the clothes in the inner drum are placed at a leaning position can be avoided, and the situation that the spring bolt is broken during rotationof the inner drum is thus avoided.

The invention discloses a torque overload protection tool. The torque overload protection tool is characterized by comprising an outer power cylinder, an overload protection device, a bearing assembly, a sealing assembly and an output shaft. The overload protection device comprises a center shaft, an upper spline, a lower transmission device, a spring and a lock nut; the upper spline, the lower transmission device, the spring and the lock nut are coaxial with the center shaft; torque is transmitted between the upper spline and a first lower spline through a transmission spline; the outer power cylinder is connected with the overload protection device, the lower portion of the overload protection device is sequentially connected with the bearing assembly and the sealing assembly, and the center shaft is connected with the output shaft. Due to sliding contact of contact faces between the upper spline and the lower transmission device, the torque value is controlled by compressing force of the spring; when rotating torque exceeds set overload torque, internal rotation is achieved, and damage caused by excessive torque to a downhole tool connected with the center shaft is avoided; when the rotating torque does not exceed set separation torque, the torque can be output continuously, and working is completed.

The invention discloses a juicer capable of automatically discharging residues. The juicer comprises a seat, a juice collecting disc, an upper cover, a cutter head and a filtering part, wherein the juice collecting disc and the upper cover are arranged on the seat; and the cutter head and the filtering part are driven by a motor arranged in the seat. The juicer is characterized by also comprising a residue discharging device which is arranged inside the filtering part and moves relative to the filtering part, wherein the residue discharging device comprises a fixing rack and residue discharging strips; and the residue discharging strips are arranged in an inclined mode. Due to the arrangement of the residue discharging strips, the juicer is not required to be stopped, and the fruit residues can be timely discharged, so that the juicer can continuously work, and the working efficiency is improved; the juice yield can be effectively improved under the condition that the nutrition and mouthfeel are not influenced, and the practicality of the juicer is improved; and moreover, due to the residue discharging device, a juice throwing barrel is cylindrical, and a residue basket is arranged in the juice throwing barrel, so that the juicer is rapidly and conveniently cleaned, water and electricity can be saved, and the requirements of low carbon and environment friendliness are met.

The invention discloses a full-face stirring and cutting wall construction machine. The full-face stirring and cutting wall construction machine mainly comprises a crawler crane, a pulley block, a chain rotating device and a grouting pipe, wherein the chain rotating device mainly comprises a rectangular chain support, a chain, a plurality of knives and a motor; the grouting pipe is arranged on the rectangular chain support; chain wheels are arranged at four corners of the rectangular chain support; a plurality of guiding wheels are distributed on the two sides and the bottom of the rectangular chain support; the chain is arranged on chain wheels and the guiding wheels; the knives are distributed on the surface of the chain at intervals; a crawler crane drives the rectangular chain support to move up and down; the motor drives the chain wheels at the two corners of the upper end of the rectangular chain support to rotate; the chain wheels drive the chain; the chain drives the knives; the knives continuously cut off and stir a rock fracture face; and a plurality of knife dropping preventing mechanisms are distributed on the chain at intervals. The full-face stirring and cutting wall construction machine has the advantages that the full-face stirring and cutting wall construction machine is simple in structure, low in cost, easy to operate, high in efficiency and wide in application range and can adapt to change of rock surfaces of strata.

The invention discloses a teaching projector capable of being conveniently carried by teachers. The teaching projector comprises a shell. Four fixing rods are welded at the bottom of the inner wall ofthe shell, first telescopic rods are inserted in the upper ends of the fixing rods, a body is arranged at the upper ends of the first telescopic rods, two push rod motors are mounted at the bottom ofthe inner wall of the shell via screws, and the upper ends of the push rod motors are connected with the body by damping hinges. The teaching projector has the advantages that the body can be liftedby the aid of the push rod motors at first when the teaching projector is used, lenses of the body are higher than the shell, the damping hinges can prevent the body from easily shaking, then a knob can rotate, a rotary rod can be driven by a speed reducer via a gear to slowly rotate at the moment, a stud can be ultimately driven by the rotary rod via a second telescopic rod to rotate and can be upwardly or downwardly used under the matching effect of a support, the body can be ultimately driven by a fixture block and a clamp groove to rotate, angles of the lenses of the body can be adjusted,accordingly, good projection effects can be realized by the body, and adjustment procedures are convenient and simple.

The invention discloses a water-saving drippy washing type rotary plate apple washing machine. The apple washing machine comprises a fixing main shaft and a first supporting rod arranged on the fixing main shaft. The fixing main shaft further comprises a drive plate driven by a motor. The drive plate comprises evenly-formed concave drive grooves and first supports rotating in the drive grooves. The drive plate is further fixedly connected with second supports corresponding to the first supports. The end of each first support comprises a cleaning bottom plate provided with a rack. The end of each second support comprises a gear and a cleaning butt connection plate corresponding to the corresponding cleaning bottom plate. The problem that a large number of water resources are wasted due to pond cleaning or sprayer spraying can be further reduced, and the aim of saving water is further achieved.

The invention discloses a marine propeller. The marine propeller comprises a propeller, a movable cover ring, a transmission mechanism and a net entangling prevention device. The transmission mechanism is connected with the propeller through a transmission rod, the net entangling prevention device is connected with the movable cover ring through a rod, the propeller comprises paddle blades and endcutting blades, end cutting edges are arranged on the movable cover ring, and the end cutting blades and the end cutting edges combine to form shearing edges. When the propeller on a ship is entangled by weeds or fishing nets, the end cutting blades on the propeller and the end cutting edges on the movable cover ring combine to form the shearing edges to cut the weeds and the fishing nets into pieces; when the end cutting blades on the propeller and the end cutting edges on the movable cover ring are not sharp enough, a user can remove the end cutting blades and the end cutting edges, and theend cutting blades and the end cutting edges can be used again by replacing with new end cutting blades and end cutting edges; when the movable cover ring is not entangled by junks such as the weedsor the fishing nets and the like, the movable cover ring is away from the paddle blades on the propeller, and the paddle blades are not confined by the movable cover ring; and when the movable cover ring is entangled with junks such as the weeds and the fishing nets, the movable cover ring surrounds one side of the propeller to guarantee that the paddle blades are not affected by the junks.

The invention provides a double-driving variable speed gate hoist; the hoist comprises a high-speed motor, a low-speed motor, a bearing nut, a threaded rod, a planetary gear speed reduction component, a multi-stage speed reduction gear unit and a few teeth difference speed reduction gear unit; the planetary gear speed reduction component, the multi-stage speed reduction gear unit and the few teeth difference speed reduction gear unit are arranged in a transmission case; the few teeth difference speed reduction gear unit is composed of a first flow dividing gear, an idle wheel meshed with the first flow dividing gear, a second flow dividing gear meshed with the idle wheel, and a cam mechanism arranged outside the bearing nut; the cam mechanism is connected with a transmission shaft of each of the first flow dividing gear and the second flow dividing gear by a cam transmission shaft; the first flow dividing gear is meshed with a tail end gear of the planetary gear speed reduction component; the high-speed motor is connected with the input end of a planetary carrier of the planetary gear speed reduction component; the low-speed gear is connected with the input end of the planetary gear speed reduction component by the multi-stage speed reduction gear unit. According to the double-driving variable speed gate hoist disclosed by the invention, the problem that the current worm wheel and worm hoisting mechanism cannot hoist a pressure gate under a large capacity is solved, and the maintenance cost is reduced.

The invention discloses a waste slag processing device convenient in use for blast furnace ironmaking equipment. The waste slag processing device comprises a supporting plate, wherein the upper surface of the supporting plate is fixedly connected with a blast furnace body; the right side of the lower surface of the blast furnace body is fixedly connected with two supporting legs; in addition, thetwo supporting legs are respectively positioned on the front side and the back side of the lower surface of the blast furnace body; a first electric push rod is fixedly connected below the right sidesurface of the supporting plate. According to the waste slag processing device convenient in use for the blast furnace ironmaking equipment, the first electric push rod is arranged to enable the blastfurnace body to drive a box body to rightwards move to the right side of the blast furnace body through a rotation device, a second electric push rod is arranged and extends to drive the box body torotate around a second spindle through the flexible rotation of a first spindle and a movement device, waste slag in the box body can fall into a prepared small cart from the box body, so that the labor intensity of people for cleaning waste slag is lightened, and convenience is brought to people to clean the waste slag.

The invention discloses a wind power water motion system, which comprises a wind power rotation mechanism, helical blades, a fixing mechanism and a water level lifting mechanism, wherein the fixing mechanism is vertically arranged; the lower end of the fixing mechanism is arranged in water; the wind power rotation mechanism is arranged at the top end of the fixing mechanism; the helical blades are helically-ascendant sheets; the helical blades and the water level lifting mechanism are arranged at the bottom of the fixing mechanism; the wind power rotation mechanism comprises a frame, a pair of rotation blades and a pair of blade rotation shafts; the frame is vertically arranged; the pair of blade rotation shafts is arranged on the frame respectively; one end of each rotation blade is correspondingly fixed on each blade rotation shaft; and the rotation blades are rotated around the blade rotation shafts, and are extended from the blade rotation shafts to the outer side of the frame. In the invention, wind power is used to make still water flow and ensure the invariability of water flow directions, so that the still water is changed into flowing water; and the system does not consume energy sources, does not generate pollution and noise, has low cost and a simple structure and is suitable for the still water or stagnant water.

The invention discloses a marine anti-net-twining propeller. The marine anti-net-twining propeller comprises a propeller body, a movable cover ring, a transmission mechanism and an anti-net-twining device; the transmission mechanism is connected with the propeller body through a transmission rod, the anti-net-twining device is connected with the movable cover ring through a rod, and the propellercomprises propeller blades and a first cutting edge opening; and the movable cover ring is provided with a second cutting edge opening, and the first cutting edge opening and the second cutting edge opening form a shear opening. When weed or a fishing net is twined around the propeller body on a ship, the weed or the fishing net is cut up though the shear opening formed by the first cutting edge opening in the propeller body and the second cutting edge opening in the movable cover ring; when the first cutting edge opening in the propeller body and the second cutting edge opening in the movablecover ring are not sharp, a user can remove and replace the first cutting edge opening and the second cutting edge opening with the new one and use again; when the weed or the fishing net or other sundries is not twined around the movable cover ring on the propeller body, the movable cover ring is away from the propeller blades on the propeller body, and the propeller blades cannot be limited bythe movable cover ring; and when the weed or the fishing net or other sundries is twined around the movable cover ring, the movable cover ring surrounds on one side of the propeller body to ensure that the propeller blades are affected by the movable cover ring.

The invention provides a fire-fighting waterway system and an operating vehicle. The fire-fighting waterway system comprises a main water outlet pipeline assembly, a first branch water outlet pipelineassembly and at least one second branch water outlet pipeline assembly, wherein the main water outlet pipeline assembly comprises a main water outlet pipeline; the second branch water outlet pipelineassemblies are connected with the water outlet ends of pipelines, and each second branch water outlet pipeline assembly comprises a second water outlet end; and each second branch water outlet pipeline assembly comprises a second branch water outlet pipeline connected with the water outlet end of the corresponding pipeline and a flow control valve arranged on the second branch water outlet pipeline, and the flow control valves are used for controlling the flow of the second branch water outlet pipelines. According to the technical scheme, the flow control valves can control the flow of fire-fighting water at a discharge port in a third branch water outlet pipeline, so that the water outlet pressure value of the fire-fighting water at the discharge port is a constant value, the working pressure requirement of the second water outlet end is met, the problem that the second water outlet end is damaged due to the fact that the water outlet pressure at the discharge port is too large is avoided, therefore, the second water outlet end can work normally, and then the fire-fighting waterway system can work normally.

The invention discloses a rotary textile wastewater treatment device and a use method, belongs to the field of sewage treatment, and can realize that textile wastewater is injected into a reaction treatment bin by technicians, then a rotary ring sleeve is arranged on a treatment stand column in a sleeving manner, the rotary ring sleeve falls down along with gravity, a water dissolving block is dissolved firstly, quicklime particles react with water to release heat, heat transfer accelerates movement of substances around textile wastewater, then a heat collecting plate is used for covering to transfer heat to enable an expansion air bag to expand, then the internal pressure of a compressed air film is increased, when a second dissolving block is dissolved, oxygen in the compressed air filmis jetted out due to increase of the pressure, the rotating ring sleeve is driven by a power paddle to rotate, oxygen is uniformly dispersed in the textile wastewater in order to increase the oxygen content of a water body and supply oxygen for subsequent purification of microorganisms, fibrous impurities in the textile wastewater are connected through an arc-shaped intercepting hook and a side branch hook to be wound and recycled, and collection and filtration are completed.

The invention discloses a self-power-generating energy-saving pruning shear, comprising a first rotating arm and a second rotating arm which are hinged to each other, and the first rotating arm and the second rotating arm are provided with a first cutting edge and a second cutting edge. First springs are arranged on hand-held portions, the first rotating arm is provided with a power generating component, the second rotating arm is provided with a curved rack, and the first rotating arm is provided with a battery connected with the power generating component. A winding motor is disposed on thefirst rotating arm, a winding wheel is disposed on the winding motor, and a pulling rope is connected between the winding wheel and the second rotating arm. The first cutting edge is rotatably connected to the first rotating arm, the first rotating arm is provided with a limiting protrusion, and a second spring is disposed between the limiting protrusion and the first cutting edge. One side of therotation center of the first cutting edge abuts against the other side of the second spring and against the limiting protrusion, and the limiting protrusion is provided with a contact switch. This pruning shear not only achieves the requirements of light weight, but also enhances the endurance ability and achieves the purpose of saving energy.

The invention provides a B-ultrasonography probe disinfecting device convenient to use. The device comprises a clamping beam unit, a dustproof case, a concave type frame, supporting foot stands, a disinfection box unit, a B-ultrasonography probe, a control box and a disinfectant storage case, wherein the clamping beam unit is installed on the upper portion of the dustproof case in a bolted mode, and the dustproof case is installed in the middle in the concave type frame in a bolted mode. By arranging a clamping beam body, a motor, a motor installation plate, an adjustable clamp rod unit, an installation wheel, a sliding rail and a B-ultrasonography probe chuck unit, the probe can be driven by the motor to rotate in all directions, so that the probe can be completely disinfected so as to be normally used in the later stage, and disinfection efficiency is improved. By arranging an adjustable clamp rod body, an installation groove, a probe clamping block, fastening screws and a rubber mat, the probe can be clamped quickly, clamping and cleaning of probes in different specifications can be achieved, using is more convenient, and application and popularization can be achieved easily.

The invention relates to a perforating machine, and in particular, to a four-hole button uniform perforating machine for clothes. The four-hole button uniform perforating machine for the clothes, which can automatically perforate a button for multiple times, and can further fix the button, is provided. The four-hole button uniform perforating machine for the clothes comprises a bottom plate, second supporting columns, and a feeding frame, wherein first supporting columns are symmetrically and fixedly connected to one side of the top of the bottom plate; the second supporting columns are symmetrically and fixedly connected to the side, away from the first supporting columns, of the top of the bottom plate; and the feeding frame is connected between the tops of the second supporting columns.By using the four-hole button uniform perforating machine, the effects of automatically perforating the button for the multiple times and further fixing the button are achieved; after an electric drill bit descends and perforates the button, the button can be rotated by a quarter of a circle under the cooperation of a second sliding rod and a grooved wheel; and four holes can be uniformly formedin the button by repeating the operation for four times in this way.

The invention provides a mark printing mechanism based on a linkage mechanism. A vertical plate is fixedly mounted on a mounting base; a linkage mounting platform is mounted at the side wall of the vertical plate and supported by triangular brackets; a rotating shaft mounting base is fixed on the linkage mounting platform; a rotating shaft is supported and mounted on the rotating shaft mounting base; a crank is fixedly mounted on the rotating shaft; the other end of the crank is hinged with a first link; the other end of the first link is hinged to the middle of a second link; one end of the second link is hinged to the side wall of a side plate through a first connecting shaft; the other end of the second link is hinged to one end of a third link; the other end of the third link is hingedto the center of the upper half of a crank arm; and the top end of the crank arm is hinged with a fourth link.

The invention discloses a crusher rotor and hammer arrangement structure which comprises a spindle; the spindle is supported on a crusher rack through a bearing seat component; side discs are symmetrically arranged at the two ends of the spindle and in a crushing tank body; a plurality of middle discs are installed between the side discs through positioning disc components which are arranged at anequal interval in a positioning manner; a plurality of pin shafts are uniformly distributed on each of the side discs and the positioning disc components; a hammer and a protective sleeve used for protecting each pin shaft is selectively installed on each pin shaft and between two adjacent middle discs; and the side discs, the middle discs and the positioning disc components are installed on thespindle through first flat keys in a matching manner. A crusher rotor can be used for a crusher, so that the crushing efficiency is greatly improved, and the crushing ability is improved; and in addition, by adopting different hammer arrangement modes, the crushing effect is ensured to a certain extent.

The invention relates to the field of woven bag printing, and specifically relates to a woven bag printing device that comprises a woven bag roll rotationally mounted on a rack, and a triangular supporting roller set is arranged in a continuous cylindrical woven bag led out of the woven bag roll. The upper face and the lower face of the woven bag are separated through the triangular supporting roller set, two rollers at the bottom of the triangular supporting roller set are supported by the corresponding supporting rollers in a rolling mode across the woven bag, a printing assembly capable ofascending and descending is arranged on rollers at the top of the triangular supporting roller set across the woven bag, and a driving roller set for driving the woven bag to move is arranged behind the triangular supporting roller set. The printing device has the advantages that the printing ink on the upper layer cannot permeate to the lower layer, the printing quality is further ensured, and asthe woven bag is propped open by the triangular supporting roller set, the printed woven bag pattern can be dried quickly, and the defects of painting and the like caused by the fact that the printing ink is not dry are overcome.

The invention provides a clamping tool for automobile repair and maintenance. The clamping tool for automobile repair and maintenance comprises a rack and a working table, the upper part of the working table is fixedly connected with a dust removal cover shell, a dust removal mechanism is arranged inside the dust removal cover shell, front and rear sliding rails are arranged on the left and rightsides of the working table, a front and rear adjusting bracket is erected at the upper end of the working table, both ends of the front and rear adjusting frame are slidably connected with the front and rear sliding rails through sliding block mechanisms correspondingly, one end of the front and rear adjusting frame is fixedly connected with a horizontal motor, the output end of the horizontal motor is connected with a horizontal lead screw in a driving mode, the other end of the horizontal lead screw is rotatably installed on the front and rear adjusting frame, the horizontal lead screw is connected to two clamping plates through connecting pieces, the two clamping plates move on the horizontal lead screw in the opposite direction, the lower part of the working table is fixedly connectedwith a connecting frame, the upper part of the rack is fixedly connected with a vertical motor, the output end of the vertical motor is connected with a vertical lead screw, the connecting frame is provided with a threaded hole allowing the vertical lead screw to penetrate. The clamping angle of the clamping tool and the orientations of up and down, left and right, and front and rear are adjustable.

The invention belongs to the field of plastic pipe manufacturing, and particularly relates to a double-wall corrugated pipe. The double-wall corrugated pipe comprises a pipe body, corrugated rings, rotating rings and guide plates, wherein the pipe body is made of a high-strength PVC material; the outer surface of the pipe body is uniformly and fixedly connected with the corrugated rings at intervals; the inner wall of the pipe body is uniformly and rotatably connected with the rotating rings at intervals; the inner surface of each rotating ring is arc-shaped; the guide plates are fixedly arranged at the inner wall surfaces of the rotating ring; and the inclination angles of the guide plates are gradually increased from bottom to top. The double-wall corrugated pipe mainly solves the problems that sludge is easily accumulated at the bottom of a pipeline and cannot be cleaned when a double-wall corrugated pipe is used in a sewer, a large amount of dirty materials are easily accumulated at the turning position of the pipeline, and leakage is easily caused by oxidation corrosion of the outer surface of the double-wall corrugated pipe due to the fact that the double-wall corrugated pipeis laid underground and the underground environment is moist.