31results about How to "Prevent unraveling" patented technology

A gland packing is braided in a state where, in crossing angles of yarns which are exposed on four side surfaces of a string-like member, crossing angles in adjacent side surfaces of the four side surfaces are different from ch other. The string-like member is looped so that the crossing angle on the side surface in the four side surfaces, the side surface being to function as an inner circumferential surface, is larger than the crossing angles on side surfaces which are to function as side circumferential surfaces adjacent to the inner circumferential surface.

A fine steel cord for the reinforcement of synchronous belts is presented. The fine cord has a distinct load elongation curve characterized by a very low structural elongation (below 0.09% preferably below 0.06%), and a high equivalent modulus between 0.2 and 20% of the breaking ', load. The favorable results are maintained when the cords are coated with an elastomer coating. Such a fine steel cord reduces the geometrical spread on the tooth pitch of the synchronous belts during use. A method to produce such a fine steel cord is also presented.

The present invention relates to a dental implant, and more particularly, to a dental implant in which a fixture and an abutment are together by a separate screw post so as to prevent the breakage of an implant screw tightening part and uniformly transmit forces over the entirety of a contact surface, to thereby prevent stresses from being partially concentrated, and in which the screw-tightening direction between the fixture and the abutment is variable so as to improve the coupling force between the fixture and the abutment and fundamentally prevent a screw from becoming loosened. The dental implant of the present invention comprises said fixture and abutment, the abutment including a lower abutment to be fitted onto the fixture, and an upper abutment connected to an upper portion of the lower abutment, the lower abutment and the upper abutment being separate from each other. The upper abutment and the fixture are coupled and fixed by the screw post.

The invention discloses a comprehensive warning device for road traffic. A protective warning assembly is arranged on the outer side of a base, a horizontal plate is slidably installed in a counterweight groove, warning belts are evenly distributed on the side face of a fixed supporting rod, a conical warning assembly is arranged in the base, and the bottom end of a warning lamp is sleeved with a conical outer layer. The protective warning assembly is small in occupied space and easy to carry when being folded, the protective warning assembly can be used as a guardrail with the adjustable shape after being unfolded, the conical warning assembly and the ground marking warning assembly can be stored in the protective warning assembly. Extra space is not occupied, the conical warning assembly and the ground marking warning assembly can be used in cooperation with the protective warning assembly, warning is performed through different methods, the overall warning effect is improved, the limiting and cleaning effects are achieved when the protective warning assembly is stored and unfolded through the limiting and cleaning assembly, and use convenience is improved.

The invention discloses a manufacture method of a single side ridge type water retaining rubber plate of an airplane tire. According to the manufacture method, one side with the water staining rubber plate is designed at a lower mold of a vulcanization mold in advance for vulcanization; an extruding opening model is designed according to the shape of the designed water retaining rubber plate and is used for extruding out a rubber strip of the water retaining rubber plate; and during the tire vulcanization, the rubber strip subjected to pretreatment is put in a groove of a lower mold to be integrally vulcanized and formed with a pretreated forming tire blank. The manufacture method mainly belongs to the method that before the vulcanization, a rubber strip semi-finished product is preset in the mold, and the forming and the fixation in the mold are realized through vulcanization. The method has the advantages that the problem that the water retaining rubber plate position generates the defects of rubber lack, tire cavity thread exposing and the like after the airplane tire vulcanization of the single side ridge type water retaining rubber plate can be effectively solved, and the product quality is improved; and the water retaining rubber plate is prevented from being thrown away in the tire use process, the number of use times can be increased by more than ten times, the service life of the tire is prolonged, and the safety performance of an airplane is improved.

The invention discloses a comprehensive warning device for road traffic. A protective warning assembly is arranged on the outside of the base, a horizontal plate is slidably installed inside the counterweight groove, warning tapes are evenly distributed on the side of a fixed support rod, and a tapered warning assembly is arranged inside the base. , the bottom end of the warning light is sleeved with a tapered outer layer, the bottom of the storage box is equipped with a ground marking warning component, and the side of the storage box is equipped with a limited cleaning component. The protective warning component of the present invention takes up little space when folded and is easy to carry. Used as an adjustable guardrail, both the cone warning component and the ground marking warning component can be stored inside the protective warning component without taking up extra space, and the cone warning component and the ground marking warning component can be used together with the protective warning component , Use different methods to warn and improve the overall warning effect. The limit cleaning component plays the role of limiting and cleaning when the protective warning component is stored and unfolded, and improves the convenience of use.

The invention relates to an ultra-fast cooling technology of an ultra-thick hot-rolled coil and a coiling method. The ultra-fast cooling technology is characterized by comprising the steps that strip steel which is 25.4 mm thick and has the specification of X70 is rolled through a finishing mill and cooled to 500-550 DEG C through an ultra-fast cooling section, air cooling is conducted for 2 s, and cooling is conducted through a normal layer to reach the coiling temperature ranging from 400 DEG C to 450 DEG C; strip steel head coiling machine pinch roll position control time is 0.03 s, and the strip steel is fixed in advance; the number of coiling turns of the strip steel head is increased to five turns, a wrapper roll makes contact with the strip steel head continuously till a coiling block load torque is 12.66 KN.M, the wrapper roll is opened normally, when the head coils tightly and the strip steel is close to the tail, the pressure of the wrapper roll is increased to 750 KN, and it is guaranteed that the tail strip steel coils stably; the tail-holding time of an ultra-thick strip steel tail wrapper roll is 8-12 s, and the tail strip steel shape is fixed. According to the ultra-fast cooling technology of the ultra-thick hot-rolled coil and the coiling method, the steel coil strength is guaranteed, and the DWTT fracture toughness is effectively improved. The low-temperature coiling temperature of 400-450 DEG C far exceeds the design capacity of equipment coiling this type of steel, and a major breakthrough to the prior art is achieved.

The invention discloses a manufacture method of a single side ridge type water retaining rubber plate of an airplane tire. According to the manufacture method, one side with the water staining rubber plate is designed at a lower mold of a vulcanization mold in advance for vulcanization; an extruding opening model is designed according to the shape of the designed water retaining rubber plate and is used for extruding out a rubber strip of the water retaining rubber plate; and during the tire vulcanization, the rubber strip subjected to pretreatment is put in a groove of a lower mold to be integrally vulcanized and formed with a pretreated forming tire blank. The manufacture method mainly belongs to the method that before the vulcanization, a rubber strip semi-finished product is preset in the mold, and the forming and the fixation in the mold are realized through vulcanization. The method has the advantages that the problem that the water retaining rubber plate position generates the defects of rubber lack, tire cavity thread exposing and the like after the airplane tire vulcanization of the single side ridge type water retaining rubber plate can be effectively solved, and the product quality is improved; and the water retaining rubber plate is prevented from being thrown away in the tire use process, the number of use times can be increased by more than ten times, the service life of the tire is prolonged, and the safety performance of an airplane is improved.

Described herein is a novel method and apparatus for preventing spark propagation from a hydraulic joint (110) to a surrounding medium, such as a fuel source. The hydraulic joint (110) includes a fitting (112) and tubes (114, 116). A tip seal (122) may be placed about the edge of the hydraulic fitting (112) or a sleeve (118) may be placed about the joint (110), each resulting in an independent mechanical barrier between the joint (110) and surrounding medium, thereby preventing spark propagation to the surrounding medium.

The invention discloses a multi-strip paper roll roll-loosening-preventing device which comprises a base, a front guide rail and a back guide rail. The front guide rail and the back guide rail are arranged on the base in parallel, a plurality of movable pressing plate mechanisms are movably installed on the front guide rail, and air cylinder supporting mechanisms are movably installed at the positions, corresponding to the movable pressing plate mechanisms, of the back guide rail; and the air cylinder supporting mechanisms are hinged to the back portions of the movable pressing plate mechanisms, the movable pressing plate mechanisms are controlled by air cylinders to rotate, and therefore the upper surfaces of the movable pressing plate mechanisms press paper rolls all the like, and the paper rolls are prevented from loosening. By means of the provided multi-strip paper roll roll-loosening-preventing device, uniform pressing on multiple paper rolls is achieved, the degree of tightness of interleaving paper is guaranteed, and the roll loosening condition is prevented.

The invention relates to the technical field of fire disaster rescue, in particular to a high-rise fire disaster escape method. The method comprises the following steps that firstly, a trapped personuses a wet towel to cover the mouth and the nose, and smoke is prevented from entering the respiratory tract; secondly, the trapped person in the first step rapidly approaches a high-rise escape device; and thirdly, the trapped person escapes through the high-rise escape device in the second step. A storage mechanism of the high-rise escape device adopted in the method is fixed to the wall througha supporting frame, an installing mechanism and a lifting mechanism are arranged at the top end of the storage mechanism, a rope droops from a floor through rotation of the lifting mechanism, a connecting mechanism is arranged in the storage mechanism, the person and the rope are fixed together through the connecting mechanism, people slide down from the rope, and people can conveniently escape from the fire disaster.

The invention discloses an automatic safety belt. The automatic safety belt includes a seat, the seat includes a seat cushion and a backrest, and a rotating shaft is installed in the seat cushion; theautomatic safety belt further comprises a rotating frame disposed outside the backrest, a gear motor and a cover cap, wherein the gear motor and the cover cap are fixedly mounted on both sides of theseat cushion correspondingly; one end of the rotating shaft is connected to the gear motor, and the other end of the rotating shaft is fixedly connected with a rotating disc disposed in the cover cap; a first micro switch and a second micro switch are arranged in the cover cap; a sliding groove formed between two belt wheels is internally provided with a plurality of guiding wheels for guiding abelt; a sliding block is mounted on a groove opening of the sliding groove, and the sliding block is fixedly connected with the belt, and a third micro switch and a fourth micro switch are mounted onguide rails at both ends of the sliding groove correspondingly; and drive motors are mounted on one ends of the guide rails. The automatic safety belt further comprises a single chip microcomputer. The first micro switch, the second micro switch, the third micro switch and the fourth micro switch transmit signals to the single chip microcomputer, and the single chip microcomputer controls the gearmotor and the drive motors. The automatic safety belt can automatically bind passengers forcibly to ensure the safety of the passengers.

Described herein is a novel method and apparatus for preventing spark propagation from a hydraulic joint to a surrounding medium, such as a fuel source. The hydraulic joint includes a fitting and a tube. A tip seal may be placed about the edge of the hydraulic fitting or a sleeve may be placed about the joint, each resulting in an independent mechanical barrier between the joint and surrounding medium, thereby preventing spark propagation to the surrounding medium.

The invention relates to a steel coil unfolding assistant device, which is characterized in that: two symmetrically structured mechanisms are respectively installed at the left side and the right side in front of a steel coil of an uncoiler, material retaining rolls are utilized to exert a force on the steel coil surface to control the looseness of the steel coil; each of the mechanisms has a structure that: a pedestal is fixed on the ground, a laterally shifting oil cylinder and a sliding frame are arranged on the pedestal, the laterally shifting oil cylinder drives the sliding frame to make horizontal movement; and a material retaining oil cylinder and a material retaining frame are mounted on the sliding frame, the material retaining frame is provided with a material retaining roll and a hydraulic motor, the material retaining oil cylinder pushes the material retaining frame so as to further push the material retaining roll to be retained on the external surface of the steel coil, the hydraulic motor drives the material retaining roll to rotate so as to assist coil unfolding, and the top of the material retaining frame is equipped with an approach switch for detecting and controlling the distance between the material retaining roll and the steel coil external surface. Being able to effectively prevent a steel coil scatter phenomenon and enhance the production efficiency, the assistant device has the characteristics of simple structure, low cost, easy realization of installation and operation.

The invention relates to the technical field of fire rescue, in particular to a high-rise fire self-rescue rescue device, which includes a support frame, a storage mechanism, an installation mechanism, a connection mechanism, a partition, a limit mechanism, a water storage mechanism, a lifting mechanism, a closing mechanism and The fixing mechanism, the storage mechanism is fixed on the wall through the support frame, the installation mechanism and the lifting mechanism are installed on the top of the storage mechanism, the lifting mechanism is rotated to make the rope hang down from the floor, and the connecting mechanism is installed inside the storage mechanism, and the connecting mechanism fixes the person and the rope together. Make people slide down from the rope, which is convenient for people to escape from fire; a partition is installed inside the storage mechanism, masks and other items are placed in the partition, and a water storage mechanism is installed above the partition, and the water storage mechanism is opened to make the water inside the water storage mechanism Sprinkle on the mask, wet the mask to prevent smoke and dust from entering the mouth; install a limit mechanism on the side wall of the lifting mechanism, and the limit mechanism engages with the installation mechanism to fix the lifting mechanism inside the installation mechanism to prevent the rope from being untied.

A button and button hole structure (10) is configured so that parts (24, 44) linking each of a pair of buttons (22, 42) and a section of fabric (12) on one side are positioned at the distal ends or proximal ends of a pair of button holes (32, 42) provided to a section of fabric (14) on the other side. Therefore, when the buttons (22, 42) are buttoned, it is possible to have the buttons (22, 42) move less, relative to the button holes (32, 52), than in the past, and the buttons (22, 42) can stay buttoned more stably. As a result, the buttons are less likely to come undone inadvertently, and increasing the size of the button holes (32, 42) facilitates buttoning and unbuttoning of the buttons (22, 42).

A steel cord is composed of three to six steel filaments each having a filament diameter of from 0.25 to 0.45 mm, the three to six steel filaments including shaped filaments and twisted together, wherein the shaped filaments are, before twisted together, coiled to be set in a form of coil having a coil diameter of less than 5 mm and a coil pitch of more than 5 mm, the shaped filaments include at least two kinds of shaped filaments which are different in respect of the form of coil, the shaped filaments are twisted together while the coil diameter is reduced, the elongation of the cord at 50N load is less than 0.2 %, and the cord strength is in a range of from 2500 to 3500 N / sq.mm.

The gland packing is composed of a ribbon-shaped body braided with a plurality of yarns, and is set to have a square cross-section on which the direction of the yarns is parallel to a diagonal line, and the direction of the yarns is The number of moving paths is four, and among them, through further research, the sealing performance was improved as a structure that is less likely to leak. The gland packing G is woven so that the intersection angles (α) of the yarns (1) exposed on the sides (2a-2d) of the strip (2) are adjacent to each other among the four sides (2a-2d). In the state where the sides are different from each other, the intersection angle (α) of the side surface (2c) which becomes the inner peripheral surface among the four side surfaces (2a-2d) is compared with the angle of intersection (α) of the side surfaces (2b, 2d) which become the adjacent side peripheral surface The strip-shaped body (2) is curled so that the crossing angle (α) is large.