33results about How to "Won't cause tangling" patented technology

The invention discloses a special automatic packaging equipment for polyester yarn, which belongs to the technical field of polyester yarn packaging. A special automatic packaging equipment for polyester yarn, comprising a box body, the top of the box body is provided with a through groove, and the box body is provided with two symmetrical first grooves, and the inner walls of the two first grooves are respectively rotated and connected with a first rotating shaft and the second rotating shaft, the outer wall of the first rotating shaft is respectively slidably connected with a first rotating disc, the outer wall of the first rotating disc is fixedly sleeved with a second rotating disc, and a roller is fixedly connected between the two fixed discs, and a roller is provided on the roller. Two sets of first chute staggered with each other, the second rotating disk cooperates with the first chute; the present invention is simple in structure, easy to operate, does not need manual operation, reduces labor intensity, avoids potential safety hazards, and at the same time, the packaging tube It can move when turning, which increases the aesthetics of the packaging, avoids the messy winding of polyester filaments on the packaging tube, and is convenient to use.

The invention discloses a center flushing device for a center-closed cutter. The center flushing device for the center-closed cutter comprises a small swivel joint, a large swivel joint, a transition piece, a cutter flange and nozzles. The small swivel joint is connected to the large swivel joint and is in series connection with the large swivel joint, the large swivel joint is fixed on the transition piece, the transition piece is fixed on the cutter flange, the nozzles are arranged on the cutter flange, a channel I of the small swivel joint is abutted with a channel II of the large swivel joint, and the channel II is abutted with a channel III in the transition piece, and the channel II is connected with the nozzles. According to the center flushing device for the center-closed cutter, a water source enters from the inlet of the small swivel joint, passes the channel, the channel II and the channel III and then is sprayed from the nozzle I and the nozzle II, residual soil in the closed cutter center is improved, the residual soil is effectively prevented from being incrusted, and the work efficiency is improved. Furthermore the center flushing device for the center-closed cutter rotates along with the cutter flange entirety, thus winding of a pipeline is not caused, and the occurrence rate of faults is reduced. The center flushing device for the center-closed cutter is convenient to use, easy in manufacturing and good in use effect.

The invention discloses a test assembly and a test method for dynamic tension-shear mechanics parameters of brittle materials. The test piece assembly includes an oblique cylinder test piece body and a test piece fixture. The test piece fixture includes an incident rod with a ring disk at one end, a transmission rod and The incident rod joint and the transmission rod joint are respectively connected with the incident rod and the transmission rod through the coupling structure. The specimen body is fixedly clamped between the incident rod joint and the transmission rod joint, and the outer surfaces of the incident rod and the transmission rod are also equipped with strain gauges. . This test method only needs to record the incident strain, reflected strain and transmitted strain in the whole process from the impact to the failure and fracture of the specimen through the data acquisition system of the Hopkinson tension rod device, so as to calculate the tensile force of the brittle material during dynamic loading. Stress and shear stress and other mechanical parameters can provide effective data support for the study of mechanical properties of brittle materials, so it has strong practicability.

The invention relates to the field of plasma cutting, and particularly discloses a bottom-driven-type double-parallelogram unlimited rotation bevel cutting head. The bottom-drive-type double-parallelogram unlimited rotation bevel cutting head comprises a horizontal rack, a double-parallelogram mechanism, driving devices and a cage protection connecting piece, wherein the bottom of the double-parallelogram mechanism is movably connected with the horizontal rack through swinging connecting pieces; a horizontal connecting shaft group and a vertical rod group of the double-parallelogram mechanism are connected through revolute pairs to form a horizontal parallelogram mechanism; a vertical connecting rod group and a horizontal connecting shaft group are connected through revolute pairs, and the vertical connecting rod group, the horizontal connecting shaft group and the vertical rod group form a vertical parallelogram mechanism; the driving devices are used for driving the double-parallelogram mechanism to swing vertically and horizontally; the cage protection connecting piece is in movably connected with vertical connecting rods trough pin shafts. The vertical deflection as well as the leftwards and rightwards deflection of the bevel cutting head can be independently controlled through the double-parallelogram mechanism, so that winding between cables and pipelines can be avoided; the bevel cutting head has a simple structure, and is light in weight, lower in manufacturing cost, and more energy-saving.

The invention provides a long-span welding strip threading mechanism. The long-span welding strip threading mechanism comprises a middle beam, an input guide mechanism and an output guide mechanism, wherein a plurality of containing grooves for containing welding strips are formed in the upper surface of the middle beam along the length direction of the middle beam; the input guide mechanism is also provided with a plurality of inlet guide grooves for containing the welding strips; the output guide mechanism is also provided with a plurality of outlet guide grooves for containing the welding strips. According to the long-span welding strip threading mechanism provided by the invention, the grooves with certain depth are formed in the middle beam, and the grooves for containing the welding strips are also formed in the input guide mechanism and the output guide mechanism; the depth of the grooves of the input guide mechanism and the depth of the grooves of the output guide mechanism are set according to the depth of the grooves of the middle beam, so that the welding strip is controlled to be transported at upper ends of bottom surfaces of the grooves in the middle beam all the time; when the welding strip is loosened or after the welding strip is used up, the welding strip is located in the grooves of the middle beam all the time and mutual winding is not caused.

The invention discloses an explosion-proof heating device which comprises a heating controller, a connecting wire, a heating component and an electrochemical sensor. The heating controller is connected with the heating component through the connecting wire. The electrochemical sensor is disposed on the upper portion of the heating component. The explosion-proof heating device further comprises a thermocouple which is disposed inside the heating component. The heating controller judges whether to supply power to a heating strip in the heating component for heating or not according to the temperature fed back by the thermocouple disposed in the heating component. The explosion-proof heating device has the advantages that certain temperature around the electrochemical sensor can be kept, and electrochemical sensor detecting equipment can effectively detect the concentration of poisonous and harmful gases and give out alarms; whether heating is needed or not can be judged accurately to save resources; the heating component is of a reasonable integral structure; the deep thread structure of the inner wall of a heat guide pipe facilitates heat transferring; a locking sleeve is used as a connecting part, and safety and reliability are achieved; a blown fuse is used as the secondary guarantee of the heating device, and explosion accidents can be prevented.