81 results about "Spiral joint" patented technology

The spiral window curtain holder includes upper and lower parallel spiral steel wires, slide rod and seats at two ends. The riigd steel wires in the shape of spring can be rotated by the drive mechanisms inside the seats. The slide rod has several curtain ring seats capable of shifting along the slide rod, at least one guide seat connected with the ring seats and two upwards rotating roll needles clamped onto the spiral joints. Compared with available technology, the present invented curtain needs very small drive force to be driven and is light and low noisy. In addition, the present invention has relatively lower cost.

The invention discloses a spiral steel pipe with reinforcing rings and a manufacturing method of the spiral steel pipe. The steel pipe comprises a spiral pipe body formed by spirally winding main steel strips; spiral joints are formed between the adjacent main steel strips of the spiral pipe body; the reinforcing rings are spirally wound on and locked to the outer wall or the inner wall of the spiral pipe body; at the spiral joints, the reinforcing rings are formed by bending narrow steel strips and the sections of the reinforcing rings are circular-arc-shaped, square or trapezoidal. The reinforcing rings are capable of enhancing the overall annular strength of the pipe, the thickness of the pipe can be reduced by more than a half, and the cost can be greatly reduced; meanwhile, the inertia moment of the circumferential section of the pipe is increased exponentially; as a result, the effect of the reinforcing rings is much better than that of a common reinforcement way, and consequently, the deformation problem of a large-diameter steel pipe, in particular a steel pipe of which the diameter is greater than 4m, during production is solved, and a steel pipe with an ultra-large diameter (10m or above) can be produced. Besides, the spiral joints formed between the adjacent sections of the spiral steel pipe are capable of surrounding the reinforcing rings so that the leakage protection at the joints can be strengthened.

The invention discloses a locally abandoned agent-tube cylinder, which comprises the following parts: running hollow injection cylinder, handle pivoted at back end of the injection cylinder, push rod in the injection cylinder and handle, wherein the injection cylinder, handle and push rod are stainless steel material; the front end of the injection cylinder is a spiral joint end with a perspective cylinder which is made of transparent or perspective material; one needle joint and through-hole are set at the front end of the perspective cylinder; the needle joint connects a double-head needle which contains needle seat to connect the needle and injection rod throughout the needle seat. The inveniton can observe liquid condition in the cylinder sufficiently, which can judge the exertion and optimum stopping point precisely.

The invention discloses a dumbbell capable of preventing dumbbell discs to rotate. The dumbbell comprises a dumbbell rod and the dumbbell discs. The dumbbell discs are fixedly installed on the inner sides of the two ends of the dumbbell rod through limiting sleeve discs, and the dumbbell discs are isolated and limited through a bolt bar, the bolt bar penetrates through threaded hole in the dumbbell rod and the limiting sleeve discs to be connected with a limiting nut, the two ends of the limiting sleeve disc are each provided with a dumbbell rod stop piece and a nut lantern ring plate respectively, a grip cover is installed between the dumbbell rod stop pieces on the left and right sides, a plurality of sweat absorption groove holes are formed in the outer side of the grip cover, the dumbbell rod is of a cylindrical structure with spiral joints at the two ends, limiting pin shafts are symmetrically installed at the two ends of the dumbbell rod, rotation of the dumbbell discs is greatly avoided, and the use safety of a user is improved.