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This invention discloses a rib-connection detection device and a rib-cutting device, relating to the field of semiconductor rib-cutting technology. The rib-connection detection device includes a frame, a drive mechanism, a detection rod, a transmission mechanism, and a sensor. The transmission mechanism is movably mounted on the frame, with one end connected to the detection rod and the other end engaging with the sensor. The drive mechanism is mounted on the frame and is used to feed the product towards the detection rod. The detection rod extends into the rib-cutting groove of the product and slides within the groove. When ribs remain in the groove, the detection rod, under the resistance of the ribs, drives the transmission mechanism to move, enabling the sensor to detect rib-cutting defects in the product. The rib-connection detection device provided by this invention can accurately detect rib-cutting defects in products, with high detection precision and good detection effect, and can effectively reduce detection costs, making it practical and reliable.

This invention belongs to the field of buffer material technology, specifically disclosing a buffer block for a pump air bag, its preparation method, and its application. The raw materials for preparing the core layer of the buffer block include a polyurethane prepolymer and a chain extender composition A, and the raw materials for preparing the shell layer of the buffer block include a polyurethane prepolymer and a chain extender composition B. By weight, the chain extender composition A includes 60-80 parts of MOCA chain extender, 40-60 parts of hexanediol, 2-5 parts of epoxidized soybean oil, 3-5 parts of water, 0.5-1 parts of antioxidant, 0.5-2 parts of catalyst, and 0. 5-2.5 parts; Chain extender composition B includes 100-120 parts of MOCA chain extender, 10-15 parts of modified calcium carbonate whiskers, 1-1.5 parts of hydrolysis resistant agent, 0.5-1 part of antioxidant, 0.5-2 parts of catalyst and 0.5-2.5 parts of foam stabilizer. The buffer block as a whole can effectively stabilize the pressure, adapt to complex conveying media, and has excellent dynamic fatigue performance. Its application in the air jacket structure of mud pumps helps to effectively stabilize the pressure of mud pumps for a long time, and its application prospects are good.

The application relates to the technical field of expansion bolts, and particularly provides a high-strength expansion bolt which comprises a screw rod, an expansion sleeve, a gasket pipe, a flat washer and a nut, the expansion end of the screw rod is provided with a 2-stage or more than 2-stage circular truncated cone body, the other end of the screw rod is provided with a thread, the expansion sleeve, the gasket pipe, the flat washer and the nut are sequentially arranged on the screw rod, the expansion sleeve is provided with a 2-stage or more than 2-stage circular truncated cone cavity, the circular truncated cone cavity of the expansion sleeve corresponds to the circular truncated cone body of the expansion end of the screw rod, and the inclined surface of the circular truncated cone cavity of the expansion sleeve corresponds to the inclined surface of the circular truncated cone body of the screw rod; the expansion sleeve is an axial split structure and is composed of two or more than two expansion pieces. The stress span between the high-strength expansion bolt and the wall of a drill hole of a base body is large, the stress contact area is large, stress is dispersed, the wall of the drill hole of the base body is not easily damaged, the anti-seismic performance is good, the bearing capacity is strong, and the high-strength expansion bolt can be normally installed and anchored even when the base body is relatively soft.