35results about How to "Avoid the situation of pulling off" patented technology

The invention relates to a method for using a deblocking water-swellable packer. The technical scheme of the method is that an upper center pipe and a lower center pipe are movably connected through adeblocking liner pipe, the upper center pipe is fixed to the middle of the deblocking liner pipe through an upper deblocking shear pin, the lower center pipe is fixed through a lower deblocking shearpin, an upper blocking ring is fixed to the outer wall of the middle of the upper center pipe, the outer end of the upper center pipe is provided with an upper connector, a lower blocking ring is fixed to the outer wall of the middle of the lower center pipe, and the outer end of the lower center pipe is provided with a lower connector. Water-swellable rubber is processed on the outer wall. The method for using the deblocking water-swellable packer has the advantages that by design of the deblocking structure, contraction of the water-swellable rubber can be achieved, deblocking is achieved,the conditions of failure in pulling caused by high resistance of the water-swellable rubber during well repair can be avoided, a huge collapsing force on a stratum caused by a suction effect of the packer when a tensile force is reinforced in a forced mode for pulling is also avoided, and the problems of high cost and long operation cycle caused by milling operation through milling shoes are alsosolved.

The invention discloses a high-voltage and low-voltage switchgear with the function of removing condensation, which belongs to the technical field of switchgears. When condensation occurs on the inner wall of the top of the cabinet, the condensation will drop on the collection ball through the deflecting effect of the deflector. Above, the condensation on the collection ball will flow to the position of the water-absorbing layer along the outer wall of the collection ball. At this time, the condensation will be attracted to the inner side of the expansion layer through the function of the water guide wire, and the expansion layer will expand after absorbing water. The ball is squeezed, and when the liquid storage ball is compressed and contracted, the elastic ball will expand. After the elastic ball expands and the heating frame sticks to it, the touch switch is triggered to start the electric heating wire. At this time, the electric heating wire heats the heating frame, and the heating frame generates heat. Finally, the heat is transferred to the elastic ball, and the heat on the elastic ball is transferred to the liquid storage ball through the tube, and the liquid storage ball can heat the expansion layer, accelerate the evaporation of condensation in the expansion layer, and pass through the connecting tube. Tube discharge reduces the waste of electric energy and will not affect the components in the cabinet.

The invention provides a device and method integrating polishing and tapering for preparing D-shaped and tapered optical fibers. The device includes a platform main body, a lifting module, an optical fiber polishing module, an optical fiber transmission module, a fixture module, and an optical fiber heating module. and fiber optics. The first end of the lifting module is fixedly connected to the lower end of the platform main body, and the second end of the lifting module is fixedly connected to the optical fiber polishing module. The optical fiber polishing module, optical fiber transmission module, real-time monitoring module and optical fiber heating module are located at the upper end of the platform main body. In addition, the optical fiber transmission module and the optical fiber heating module are located between the optical fiber polishing module and the real-time monitoring module. The groove of the flange slider is fixed. The invention cleverly solves the problem of relative movement of the optical fiber and the polishing wheel through the design of the flange slider, and can implement both side polishing of the optical fiber and tapering of the optical fiber.

Th invention provides a bending die for a clamp. The bending die for the clamp is composed of two portions of a female die and a male die. Two or more grooves are formed in the lower portion of the female die. A protruding block is arranged in the middle of the lower portion the male die. T-shape grooves are formed in two sides of the protruding block correspondingly. Moving protruding blocks aremovably arranged in the T-shape grooves. According to the bending die for the clamp, a combined forming die is adopted, bending forming of a part is divided into two steps and completed, the circumstance caused by one-time forming that the part is snapped in the deforming process is avoided, the problem of bending forming of new parts in the new product development stage is solved, and developmentof the new products is guaranteed to be conducted continuously.

The invention discloses a high-elasticity fitness chest expander, which comprises multiple strands of steel wires and an elastic filling layer, wherein the multiple strands of steel wires are bent and are arranged in groups side by side; the elastic filling layer consists of natural rubber, nitrile rubber, vinyl resin, a polyurethane composite emulsion, high active polymer polyol, ethylene glycol, diethanol amine, triethylenediamine, a silicane surfactant, diphenylmethane diisocyanate and a prepolymer of polyether polyol; and the steel wires are covered in the elastic filling layer. Compared with the prior art, the chest expander disclosed by the invention has the advantages of high elasticity and sufficient tension, and the elasticity is not easy to decline; by internally arranging the steel wires, the circumstance that the steel wires are broken by pulling is avoided; and the chest expander is convenient to use and has values of popularization and application.

The invention discloses a wind force damping device, and belongs to the field of damping devices in an aviation drag system. The wind force damping device comprises air inlet dampers, fan impellers, an impeller shaft, exhaust air dampers, a cabin body, a decoy, a traction cable, a transmission steering device and an impeller shaft support, wherein the air inlet dampers are arranged at the front end of the cabin body; the fan impellers are arranged at the rear end of the air inlet dampers; one end of the impeller shaft is connected with the fan impellers and the other end of the impeller shaftis connected with the transmission steering device; the impeller shaft is fixed to the impeller shaft support; two ends of the impeller shaft are fixed to the cabin body; the decoy is released and isconnected with the transmission steering device through the traction cable, and the fan impellers are driven to rotate through the impeller shaft; and the air inlet dampers and the exhaust air dampersare opened at the same time, so that airflow which acts on the surfaces of the fan impellers is formed, torque for allowing the fan impellers to reversely rotate is generated, and the decoy can be decelerated or recovered. According to the wind force damping device disclosed by the invention, by using the wind force simply, the damping effect of slowing down the releasing speed of the traction cable can be generated and the situation that the traction cable is broken by pulling at the end of releasing can be effectively avoided.

The invention discloses an adjustable welding strip feeding device which is characterized by comprising a welding strip cushioning supplying device, a welding strip feeding device and a welding strip laying device. The welding strip cushioning supplying device, the welding strip feeding device and the welding strip laying device are arranged on a mounting platform, the welding strip feeding device is arranged between the welding strip cushioning supplying device and the welding strip laying device, the welding strip cushioning supplying device comprises a winding unit and a cushioning unit, the front surface of the cushioning unit is connected with the winding unit, the welding strip laying device comprises a welding strip straightening and shaping unit, a welding strip cut-off unit and a welding strip stretching unit, and the welding strip cut-off unit is arranged between the welding strip straightening and shaping unit and the welding strip stretching unit. The adjustable welding strip feeding device has the advantages that welding strips can be quickly and effectively stretched and fed under the matching effects of the winding unit and the cushioning unit, and problems of loose winding of existing welding strips and breakage of the existing welding strips in stretching procedures can be solved; the multiple welding strips can be conveniently and quickly automatically initially fed by the welding strip feeding device instead of labor and can be simultaneously laid, and accordingly the flexibility of the adjustable welding strip feeding device can be improved.