Abstract: Disclosed are a method and a device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock, which is capable of solving the problem of inaccurate arrangement of blasting hole points in tunnel excavation engineering, including following steps: establishing a three-dimensional finite element model based on a blasting section design of a tunnel; performing a simulation with the three-dimensional finite element model based on blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from multiple groups of the blasting design parameters as target blasting design parameters, wherein the preset quality parameter is an acceptance grade standard of the tunnel; obtaining first thermal imaging information of a first hot spot of a surface to be blasted; calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters.

Abstract: A fracturing pump spacer frame includes a hydraulic end connecting plate and a crosshead box connecting plate that are disposed spaced apart in parallel. The hydraulic end connecting plate and the crosshead box connecting plate are fastened by a support sleeve. The fracturing pump spacer frame further includes a leg. The hydraulic end connecting plate, the crosshead box connecting plate, the support sleeve, and the leg are integrally formed. The leg includes a first vertical supporting plate and a second vertical supporting plate that are vertically disposed and a first bottom supporting plate that is horizontally disposed. The first vertical supporting plate is located below the hydraulic end connecting plate. The second vertical supporting plate is located below the crosshead box connecting plate. Two sides of the first bottom supporting plate are respectively connected to lower ends of the first vertical supporting plate and the second vertical supporting plate.

Abstract: A fracturing pump spacer frame includes a hydraulic end connecting plate and a crosshead box connecting plate that are disposed spaced apart in parallel. The hydraulic end connecting plate and the crosshead box connecting plate are fastened by a support sleeve. The fracturing pump spacer frame further includes a leg. The hydraulic end connecting plate, the crosshead box connecting plate, the support sleeve, and the leg are integrally formed. The leg includes a first vertical supporting plate and a second vertical supporting plate that are vertically disposed and a first bottom supporting plate that is horizontally disposed. The first vertical supporting plate is located below the hydraulic end connecting plate. The second vertical supporting plate is located below the crosshead box connecting plate. Two sides of the first bottom supporting plate are respectively connected to lower ends of the first vertical supporting plate and the second vertical supporting plate.

Abstract: The present disclosure relates to a crosshead box, which is a substantially rectangular box body formed by an integral forming process and is provided with a front end surface, a rear end surface, an upper end surface, a lower end surface, and a side end surface, and the crosshead box is provided with: a plurality of crosshead cavities, each of the crosshead cavities extending in a longitudinal direction of the crosshead box and running through the box body, and the plurality of crosshead cavities being arranged in a transverse direction of the crosshead box. The crosshead box is further provided with a plurality of exhaust chambers, each of the exhaust chambers running through the crosshead box in the longitudinal direction of the crosshead box and being in communication with the corresponding crosshead cavity. The present disclosure further relates to a plunger pump provided with the crosshead box described above.

Abstract: The present application provides a detection chip assembly tool, a liquid injection apparatus and method, an electronic device, and a medium. The tool is mounted on a vacuumizing assembly, and comprises: a base mounted on a detection chip. The base is provided with a reaction cavity covering the detection chip and a fluid channel communicated with the reaction cavity, and is further provided with a liquid inlet groove structure communicated with the fluid channel and having a buffer solution injected. When the detection chip is filled with the buffer solution, the vacuumizing assembly is started to discharge air in the detection chip assembly tool, in response to the vacuumizing assembly vacuumizing, pressure relief is performed, and the buffer solution in the liquid inlet groove structure flows into the reaction cavity along the fluid channel under the action of negative pressure so as to fill the detection chip.

Abstract: A notification method includes obtaining, according to period t1, coordinates a1 and a speed v1 of a device after a first geo-fence is set, setting a second geo-fence in response to coordinates a1 being outside the first geo-fence and v1 exceeding a threshold, where the initial radius of the second geo-fence is greater than that of the first geo-fence and a center point of the second geo-fence is the same as that of the first geo-fence, obtaining, according to t1, coordinates a2 and a speed v2 of the device after the second geo-fence is set, adjusting period t1 to a period t2 in response to the coordinates a2 being within the second geo-fence and outside the first geo-fence, obtaining, according to the period t2, coordinates a3 and speed v3 of the portable electronic device, and outputting a notification when the geographical coordinates a3 are located within the first geo-fence.

Abstract: A notification method includes obtaining, according to period t1, coordinates a1 and a speed v1 of a device after a first geo-fence is set, setting a second geo-fence in response to coordinates a1 being outside the first geo-fence and v1 exceeding a threshold, where the initial radius of the second geo-fence is greater than that of the first geo-fence and a center point of the second geo-fence is the same as that of the first geo-fence, obtaining, according to t1, coordinates a2 and a speed v2 of the device after the second geo-fence is set, adjusting period t1 to a period t2 in response to the coordinates a2 being within the second geo-fence and outside the first geo-fence, obtaining, according to the period t2, coordinates a3 and speed v3 of the portable electronic device, and outputting a notification when the geographical coordinates a3 are located within the first geo-fence.