4results about How to "Guaranteed extension" patented technology

The present application relates to a kind of coal mine mining roadway type coal seam gas fracturing device, belong to coal mine gas extraction and fracturing technical field;Including pump truck body, main machine and high-pressure pump are fixedly arranged on pump truck body, the output end of high-pressure pump is provided with the first fracturing pipe and the second fracturing pipe of mutual docking, the outer side of the end of first fracturing pipe and second fracturing pipe away from each other is fixedly sleeved with packer, inner sleeve for shunting is inserted into first fracturing pipe, inner sleeve extends to the inside of second fracturing pipe, and disturbance mechanism is arranged on the outside of first fracturing pipe and second fracturing pipe;Top extension mechanism is arranged on pump truck body, and the chassis of pump truck body is lowered by top extension mechanism;Support mechanism is also arranged on pump truck body, and the support mechanism includes four telescopic arms, and the pump truck body is more stable by the unfolding of four telescopic arms;The problem that the existing roadway type fracturing device is poor in fracturing effect and lacks stability is solved.

A distributed intelligent optical fiber temperature sensing system of a cable bridge is characterized in that the bridge is provided with a bridge top, a bridge bottom, a bridge left side wall and a bridge right side wall, regular matrix type stacked cables fixed by clips are arranged in the bridge, a single optical fiber is planned according to a continuous path, and the temperature of the cable is measured through a mode of in-layer transverse column-by-column traversal of the matrix type stacked cables to interlayer longitudinal transition. Performing full-coverage temperature measurement on each cable in the stacked cables; the continuous path planning comprises repeated arrangement of a plurality of basic winding units, and each basic winding unit comprises a plurality of cable detection sections, interlayer crossing sections and calibration sections. According to the scheme, through the optical fiber length corresponding to the abnormal temperature, the database can be quickly and reversely checked to determine the cable layer and column number to which the abnormal point belongs, the purposes that one optical fiber covers the whole matrix and one hot spot is accurately positioned to a single cable are achieved, and the space positioning problem of stacked cable temperature measurement is solved.

This utility model discloses a core extraction structure for a multi-cavity mold, including a core fixing guide block, a hydraulic cylinder mechanism, and a hydraulic cylinder connecting block, all fixedly connected to the core. One end of the hydraulic cylinder connecting block is a T-shaped insertion block, and the other end is a C-shaped limiting groove. The T-shaped insertion block is positioned within a groove between the core fixing guide blocks. The end of the hydraulic cylinder rod of the hydraulic cylinder mechanism is vertically embedded in the C-shaped limiting groove, thereby connecting the hydraulic cylinder mechanism to the core fixing guide block. This utility model, by incorporating the hydraulic cylinder connecting block, facilitates the disassembly and installation of the hydraulic cylinder, improving production efficiency. Furthermore, the connecting block can connect hydraulic cylinder rods of different diameters, broadening its applicability.

The utility model relates to a window cleaning robot related technical field, especially a new window cleaning robot's adsorption cleaning mechanism, including fills the shell body, the side of shell body is equipped with drive wheel, the inside connection of shell body has the inner shell, the surface of shell body is provided with adsorption mechanism, the bottom of inner shell is provided with cleaning mechanism. This new window cleaning robot's adsorption cleaning mechanism, by separating the setting of adsorption mechanism and cleaning mechanism, avoid the interference of cleaning wheel rotation to the air flow of air inlet hole, ensure that the negative pressure produced by centrifugal fan is stable and undulation, the adsorption force always keeps constant, the cleaning mechanism is independent of adsorption frame operation, the eccentric circumferential motion of four groups of second cleaning brush and the central rotation of first cleaning brush do not influence each other, guarantee the cleaning coverage expansion times above, and also eliminate the adsorption force attenuation caused by cleaning action, realize the synchronous promotion of adsorption stability and cleaning efficiency.