30 results about "Internal mouth" patented technology

The invention provides a method for welding an anticorrosion steel pipeline with no internal repaired mouth, which is applicable to the anticorrosion treatment of a steel pipeline welding connector with an anticorrosion coating in the petroleum industry and the chemical industry. The method is characterized in that a groove with a certain length and depth is machined on a position which is at a certain distance from the end part of the steel pipe, an anticorrosion alloy material is surfaced on the groove, the end part of the surfaced steel pipe is machined into a V-shaped groove, an anticorrosion coating with sufficient thickness is coated on the inner wall of the steel pipe, the anticorrosion coating covers sufficient length of the anticorrosion alloy surfacing layer, then two steel pipes are in butt connection with each other, layering welding is carried out after the two steel pipes are fixed on one point, an argon tungsten-arc welding method is adopted, the anticorrosion alloy material which is identical to that of the surfacing is selected as the filling material, and argon is filled into the pipe to protect the pipe in the welding process. Due to the adoption of the novel technology for welding the anticorrosion steel pipeline with no internal repaired mouth, the corrosion resistance of the inner wall and a weld mouth of the pipeline can be guaranteed, the internal mouth repairing technology on the spot after the welding can be avoided, characteristics such as simplicity in construction and reliability in performance can be realized, and the method is suitable for the real engineering application of the petroleum and chemical industry fields.

The invention relates to a die head structure with the adjustable molten blank radial wall thickness. The die head structure comprises a lower pressing disc and an upper pressing disc, the lower pressing disc is provided with a mouth model containing cavity, and the upper pressing disc is stacked on the lower pressing disc and is provided with an upper pressing disc guiding cavity; the upper portion of an outer opening die extends into the opening die containing cavity and is supported on the upper portion of the lower pressing disc, the lower portion of the outer opening die extends to the position below the lower pressing disc, an inner opening die is located in the outer opening die, the upper portion of the inner opening die is matched with the lower portion of a mandrel sleeve, the lower portion of the inner opening die extends to the position below the lower pressing disc, a melt guiding and feeding cavity is formed between the outer wall of the mandrel sleeve and the inner wallof the upper portion of the outer mouth model, and space between the inner wall of the inner mouth model and the inner wall of the lower portion of the outer mouth model forms a molten blank runner; and the die head structure is characterized by further comprising an inner mouth model anti-deformation supporting mechanism and a plurality of molten blank radial wall thickness adjusting mechanisms,the inner mouth model anti-deformation supporting mechanism is fixed to the bottom of the mandrel sleeve, the molten blank radial wall thickness adjusting mechanisms are fixed to the outer wall of thelower pressing disc, and the molten blank radial wall thickness adjusting mechanisms are sleeved with an inner mouth mold cover. A good supporting condition can be provided for the inner mouth mold;and the requirement for radial change adjustment on the wall thickness of a molten blank is met.

A device for measuring cervical dilation, comprising an airway, a waterway and a scale, the airway is used for vacuuming to absorb on the surface of the internal os of the cervix, the waterway is set in the airway for providing buffering and indicating pressure changes, the scale The scale is sleeved outside the airway, and the outer wall of the airway is provided with a scale, and the end edge of the scale cooperates with the scale to indicate the degree of dilatation of the cervix. It can be used to measure cervical dilation, is convenient to use, can replace digital examination and avoid individual deviation and inconsistency of digital examination, and does not need to adopt complicated mechanical / electronic system.

The invention discloses a drainage device for postoperative anastomotic fistula and a negative pressure drainage device, which relate to the technical field of medical devices and include a dressing, a cavity drainage tube and an angiographic drainage tube. The dressing is used to fill the incision of a patient, and the dressing can absorb The patient's body fluid, the cavity drainage tube passes through the dressing along the thickness direction of the dressing, the cavity drainage tube points to the anastomotic sinus, the angiographic drainage tube runs through the cavity drainage tube along the length direction of the cavity drainage tube, the angiographic drainage tube and the cavity One end of the drainage tube extending out of the patient's body can be communicated with the negative pressure device. In the present invention, the cavity drainage tube can guide the angiographic drainage tube, so that the angiographic drainage tube can extend into the outer orifice of the anastomotic sinus, which is convenient for angiography of the anastomotic sinus to confirm the structure of the sinus. When it extends into the internal opening of the anastomotic sinus, the contrast agent is pushed again and angiography is performed to confirm whether the contrast drainage tube is extended in place, so that the anastomotic leakage can be accurately drained and the anastomotic leakage can be quickly cured.