5results about How to "Realize the blocking effect" patented technology

The freeze dryer vacuum pump comprises an end cover body, a pump body assembly and a motor assembly which are in transmission connection are arranged at the two ends of the end cover body respectively, an oil tank shell in sealing connection with the end cover body is further arranged on the end cover body, and the oil tank shell communicates with an inner cavity of the pump body assembly; an exhaust assembly connected with the oil tank shell in a sealed mode is arranged at the top of the oil tank shell and comprises a valve block capable of moving up and down. The end cover body is provided with a gas ballast assembly used for controlling the communication state of a flow channel in the end cover body and the pump body assembly, and the gas ballast assembly comprises a rotary knob body capable of rotating relative to the end cover body. The gas ballast assembly is matched with the exhaust assembly for exhausting, the gas ballast assembly is good in sealing performance and stable in structure, the sealing and filtering effects of the exhaust assembly are good, and the overall exhaust effect is greatly improved.

The invention discloses a carbon dioxide triggered expanded graphite channeling inhibitor and a preparation method, and belongs to the technical field of oil-gas field development, and the preparation method comprises the following steps: dispersing aminated graphite in distilled water to obtain aminated graphite dispersion liquid, adding nitrite into the aminated graphite dispersion liquid, and uniformly stirring to obtain the carbon dioxide triggered expanded graphite channeling inhibitor. The mass ratio of the nitrite to the aminated graphite in the S1 is (8-12): (5-10), and the carbon dioxide triggered expanded graphite anti-channeling agent solves the problem that solid-phase residues generated after degradation of the anti-channeling agent permanently block reservoir pores and cause productivity reduction, after nitrogen in a graphite layer completely escapes, the plugging effect on cracks is weakened, unblocking of the plugging agent is achieved, and the problem that the productivity is reduced is solved. And the problem of permanent loss of rock stratum permeability does not exist.

The utility model discloses an internal expansion type sealing plug which comprises an installation disc, a first extrusion disc and a second extrusion disc, the left side and the right side of the installation disc are respectively provided with a convex structure protruding outwards, the peripheral face of each convex structure is fixedly connected with a rubber ring in a sleeved mode, and the interior of each rubber ring is hollow. The first extrusion disc and the second extrusion disc are arranged on the left side and the right side of the mounting disc correspondingly, grooves matched with the convex structures are formed in the sides, facing the mounting disc, of the first extrusion disc and the second extrusion disc correspondingly, and the convex structures on the two sides of the mounting disc slidably extend into the grooves of the first extrusion disc and the second extrusion disc correspondingly. A plurality of annularly-distributed sliding holes are formed in the two sides, facing the groove, of the installation disc. The rubber ring, the extrusion disc and other mechanisms are ingeniously combined, the pipeline plugging effect is achieved, the structural design is simple and clear, use is convenient and fast, production and maintenance cost is remarkably reduced, and good market popularization and application value is achieved.

This application relates to an emergency disconnect valve for automated loading arms, belonging to the technical field of loading arm accessories. It includes a valve seat with fixed plates on the inner walls of both ends. Each fixed plate has a flow hole extending through it along its thickness direction for fluid passage. Two flow-blocking plates are positioned between the two fixed plates, each with a through hole extending along its axis. Two flow-blocking blocks are positioned between the two flow-blocking plates, with the diameter of each block gradually increasing from the end closest to the adjacent flow-blocking plate towards the other. An inclined surface is formed on the inner wall of the through hole. An elastic member is positioned between the two flow-blocking blocks. Two sets of limiting mechanisms are provided within the valve seat corresponding to the flow-blocking blocks to restrict the movement of the flow-blocking blocks by the elastic member. A triggering mechanism is also provided within the valve seat to release the limiting mechanisms and allow the elastic member to move the flow-blocking blocks. A reset window is hinged to the surface of the valve seat. This application improves the convenience and economic efficiency of reusing emergency disconnect valves.

The utility model discloses a shielding door easy to maintain, which relates to the technical field of shielding doors and comprises a shielding wall, a door hole is arranged on the shielding wall, a horizontal slide rail is fixedly mounted on one side of the shielding wall and positioned below the door hole, shielding doors are symmetrically mounted at the top of the slide rail in a sliding manner, and when the sides, close to each other, of the two shielding doors are attached to each other, the sliding rail is fixed on the sliding rail. The door hole is blocked by the two shielding doors; when the motor and the transmission mechanism need to be overhauled, maintained or replaced, a maintainer only needs to detach the bolts by means of a ladder or lifting equipment, separate the two connecting pieces from the two connecting columns respectively, and then cancel the positioning between the fixing plate and the connecting plate by the positioning mechanism, so that the fixing plate can be detached; the motor and the transmission mechanism can be detached and placed on the ground for maintenance or replacement, maintenance personnel do not need to stand at a high position for a long time for maintenance and replacement, and potential safety hazards are reduced.