49results about How to "Not easy to trip" patented technology

The invention provides a yellowing process of viscose production. The process comprises the following steps: (A) after yellowing reaction is ended, adding primary dissolution alkali and secondary dissolution alkali into a yellowing machine successively, and adding primary dissolution water while adding secondary dissolution alkali; (B) opening a discharging valve to enable cellulose sulfonate in the yellowing machine to flow to a grinding machine from a discharging pipeline, and adding secondary dissolution water into the discharging pipeline while opening the discharging valve; (C) when the discharging rate is more than 90%, adding flushing alkali into the yellowing machine, and fully discharging, namely ending a yellowing cycle. According to the process, the dissolution water is added while the dissolution alkali is added, so that the time for separately adding the dissolution water is saved and the purposes of shortening the production cycle of the yellowing machine, increasing the production capacity of the yellowing machine, improving the operating stability of equipment and reducing the current consumption of the equipment and the energy consumption are achieved.

The invention provides a yellowing system for viscose fiber production. The yellowing system comprises a yellowing machine, a discharging valve, a discharging pipeline and a pulverizer, wherein the yellowing machine, the discharging pipeline and the pulverizer are sequentially connected to one another, and the discharging valve is arranged between the yellowing machine and the discharging pipeline. The yellowing system is characterized in that the discharging pipeline is connected to a liquid inlet pipe; after yellowing reaction ends, dissolved alkali and primary dissolved water are added to the yellowing machine, after addition ends, the discharging valve is opened, meanwhile, secondary dissolved water is added to the discharging pipeline through the liquid inlet pipe, when discharging reaches above 90%, flushing alkali is added to the yellowing machine, and after flushing ends, the discharging valve is closed, and the pulverizer is stopped. The yellowing system has the advantages that the production cycle of the yellowing machine is effectively shortened, the capacity of the yellowing machine is improved, the operational stability of equipment is improved, the operating current of the equipment is reduced, and the energy consumption is reduced.

The invention discloses a clip-on insulating protective cover. The clip-on insulating protective cover comprises a sheet-shaped body, a buckle and a neck. The sheet-shaped body wraps a cable; the buckle is matched with the neck; one end of the sheet-shaped body is connected with the buckle, and the other end of the sheet-shaped body is connected with the neck; the buckle is in clearance fit with the neck; the opening of the neck and the bump of the buckle are arranged at the same side of the sheet-shaped body. The present invention provides the clip-on insulating protective cover. The clip-oninsulating protective cover is simple in structure, not easy to trip and resistant to drop and shock, can protect the normal work of the cable in the protective cover, and has a very good promotion value.

The invention relates to a special-thread gas seal oil sleeve joint for ultra-deep wells. The special-thread gas seal oil sleeve joint comprises a pipe portion and a coupling portion. The joint is composed of two main seals (conical / conical sealing structure and spherical / conical sealing structure), three auxiliary seals (-15-degree-angle torque shoulder and two right-angle torque shoulders), a deformation release space, a tool withdrawal groove and a connecting thread. The technical problem that an ultrahigh-pressure oil-gas well threaded joint is prone to thread gluing, sealing invalidation and torque shoulder shearing invalidation, low in resistance to stress corrosion and threaded connection strength and nonuniform in stress distribution is solved, and the special-thread gas seal oil sleeve joint can be used for high-temperature high-pressure oil-gas wells, deep wells, the ultra-deep wells, directional wells and horizontal wells.

The invention discloses a self-tapping lock screw, comprising a screw head, a middle thread lock section and a tail guide section. The self-tapping lock screw is characterized in that the cross-section with a large thread diameter of the thread lock section is a pentagon consisting of five large arc-shaped edges and lines. A small arc-shaped line transition is arranged between every two adjacent large arc-shaped edges and lines. The guide section is provided with a taper in the axial direction and also provided with a thread; the cross-section with the large thread diameter thereof is also a pentagon consisting of five large arc-shaped edges and lines; and the small arc-shaped line transition is arranged between every two adjacent large arc-shaped edges and lines. The invention provides aself-tapping lock screw which has small screwing moment and strong locking force and is not easy to be loosened, is particularly applicable to materials with bad ductility such as aluminium magnesiumalloy or non-ferrous metal, and the like, and can be widely applied to the fields such as aviations, automobiles, electric apparatuses, precise machines, etc.

The invention discloses a compact type energy-saving electromagnetic operating mechanism which comprises an electromagnetic mechanism, a counter-force spring and a switch-on and switch-off assembly. The switch-on and switch-off assembly comprises a lever support and a fixed pivot, wherein the lever support is arranged above the electromagnetic mechanism and extends in the horizontal direction, and the fixed pivot enables the lever support to rotate around the lever support. The counter-force spring is connected to one side of the lever support in a hung mode. A movable iron core is connected with the middle appropriate position of the lever support through a matching and connecting structure, and therefore the lever support drives the movable iron core to carry out rectilinear motion without interference through rotation motion. The overall height of the electromagnetic operating mechanism is reduced greatly through the ingenious design of the lever support, and therefore a multifunctional terminal electric appliance using the electromagnetic operating mechanism can be mounted in an electric meter box easily. The compact type energy-saving electromagnetic operating mechanism further comprises an energy-saving mechanism which comprises a lock catch unit and an energy-saving unit. The lock catch unit is used for locking the movable iron core moving to a pull-in position. Meanwhile, the energy-saving unit controls a coil to be powered off, the purpose that the coil of the electromagnetic operating mechanism does not need to be powered on when the electromagnetic operating mechanism is switched on, and a large amount of electric energy is saved.

The invention discloses a mechanical interlocking device applied to an air breaker, which structurally comprises a breaker, a secondary loop, a protecting cover, a mechanical interlocking device, a second breaker, a lock catch, and a signal lamp; the breaker is a rectangular block, and the outer part sleeves with the protecting cover; the secondary loop is mounted at the upper part of the breaker,and the protecting cover is a concaved shape and its inner part is provided with the breaker; the mechanical interlocking device is fixed at the front part of the breaker and connected with a lead ofan external motor, and the second breaker is arranged at the left end face of the breaker, its shape and dimension are equal to that of the breaker; the lock catch is fixed between the breaker and the second breaker and the connection is locked; the signal lamp is mounted at the lower part of the breaker and electrically connected. The mechanical interlocking device has the beneficial effects that the mechanical interlocking device of the air breaker can apply a ball method so that the overall connection is tight and not easy to release; the breaker cannot be closed for the gravity principleat the same time; the mechanical interlocking device is strong in practicability, high in safety performance, and convenient to use.

A jointed spearhead assembly can include a base portion that is adapted to be connected to a down-hole object and a spearhead portion having a first end and a second. The second end includes a follower tab with a non-convex first follower interface. The spearhead portion can be pivotally coupled to the base portion.

The invention discloses a method for fastening a member with high strength and low riveting force and a 10.9-level short-tail pulling rivet. The method comprises the following steps that: 1) the rivet consists of a rivet head, an unloading groove, a polished rod, a locking ring groove section, a threaded section and a tail thin short ring groove section; the radius of the inner curved surface of a locking groove is reduced from front to back; the angle of the inner inclined plane of the tail is reduced from front to back; a lantern ring is provided with a convex point, and a latch is arranged in an inner hole; 2) the rivet penetrates, the latch is screwed into the threaded section, and the lantern ring is hooked with the rivet; 3) the rivet extends into a riveting device, and a clamping jaw clamps the tail; 4) the riveting device is started, the lantern ring is extruded to deform to lock a ring groove, and the lantern ring moves forwards to break the convex point; and 5) the riveting device retreats, and fastening is finished. The unloading groove can eliminate stress concentration in riveting and use. The locking groove promotes metal flowing of the lantern ring during riveting and blocks metal flowing of the lantern ring in vibration or separation after riveting, so that fastening property and loosening resistance are improved. Due to the tail groove shape, the clamping jaw is engaged with the tail without releasing, and riveting with low riveting force is promoted. Due to the latch, the lantern ring is convenient to hook, install and operate. The rivet is applied to railway vehicles and heavy trucks with high requirements for fastening property and reliability.

The device 1 is formed from an array of generally rectangular apertures 2, each of which is formed by two long tubes 3 and two short tubes 4 of plastics material mounted to a loop of fishing net 5. Each loop of fishing net 5 is formed by crimping the ends of the loop by means of a metal crimp 6. Each of the tubes 3, 4 can rotate freely about its longitudinal axis, so that a fish brushing against a tube 3, 4 will cause the tube to rotate, and will therefore avoid becoming snagged on the tube. When such a fish grading device 1 is included in a fishing net and the net is dragged through the water, small fish are able to swim through the rectangular apertures 2, whereas larger fish are not. Thus only fish of a desired minimum size are caught.