Abstract: A film winding assembly for use in FRP tank production includes a pedestal, two supporting bases are slidingly provided on the pedestal, translation assemblies engaging with the two supporting bases are provided on the pedestal, the two support bases are configured to be hollow, sliding plates are slidably connected in the two supporting bases, a plurality of cushioning springs are connected in between the sliding plates and the two supporting bases, fixing seats are connected on the sliding plates. With the winding assembly according to the present invention, vibration generated during winding can be efficiently cushioned, users can lock the tank body quickly, tediousness and manpower consumption due to manual locking can be avoided, furthermore, with the present assembly, during winding of the tank body, particles stained on the plastic film can be cleanly timely.

Abstract: The present disclosure discloses a fiber reinforce plastic (FRP) composite material pile prepared by an FRP composite material. The FRP composite material pile includes: an FRP winding pipe, an FRP pultrusion hollow profile, and a connecting device. The FRP pultrusion hollow profile includes an outer ring pipe, an inner ring pipe, and a plurality of reinforcing bars. The FRP pultrusion hollow profile is pultruded at one time by pultrusion equipment, and fiber materials thereof are arranged in the longitudinal direction of the pipe. The FRP winding pipe is provided with circumferential fiber materials by taking the FRP pultrusion hollow profile as a membrane, and forms a composite pipe section with the FRP pultrusion hollow profile. The inner ring shape of the cross section of the FRP winding pipe is matched with the FRP pultrusion hollow profile. The FRP connecting device includes connecting plates, connecting bars, and connecting pins.

Abstract: The present invention relates to the technical field of pharmaceutical synthesis, and in particular, to a method for preparing 6-amino-4-[[3-chloro-4-(pyridin-2-ylmethoxy)phenyl]amino]-7-ethoxylquinoline 3-carbonitrile. In the present invention, Compound 3 and Compound 2 react in the presence of a sulfonic compound to give Compound 4; Compound 4, 4-nitro-3-ethoxylphenylamine and triethyl orthoformate react by heating at reflux to give a solid intermediate; the solid intermediate and a Lewis acid are heated for a ring-closing reaction to give Compound 5; Compound 5, hydrazine hydrate and activated carbon react in the presence of a catalyst to give Compound 1, which is (6-amino-4-[[3-chloro-4-(pyridin-2-ylmethoxy)phenyl]amino]-7-ethoxylquinoline 3-carbonitrile). The present invention has advantages of a short reaction route, a high yield and simple procedures, requires no extreme reaction condition, and features higher cost-efficiency and suitability for industrial manufacture.

Abstract: The present invention relates to the technical field of pharmaceutical synthesis, and in particular, to a method for preparing 6-amino-4-[[3-chloro-4-(pyridin-2-ylmethoxy) phenyl]amino]-7-ethoxylquinoline 3-carbonitrile. In the present invention, Compound 3 and Compound 2 react in the presence of a sulfonic compound to give Compound 4; Compound 4, 4-nitro-3-ethoxylphenylamine and triethyl orthoformate react by heating at reflux to give a solid intermediate; the solid intermediate and a Lewis acid are heated for a ring-closing reaction to give Compound 5; Compound 5, hydrazine hydrate and activated carbon react in the presence of a catalyst to give Compound 1, which is (6-amino-4-[[3-chloro-4-(pyridin-2-ylmethoxy) phenyl]amino]-7-ethoxylquinoline 3-carbonitrile). The present invention has advantages of a short reaction route, a high yield and simple procedures, requires no extreme reaction condition, and features higher cost-efficiency and suitability for industrial manufacture.

Abstract: The present disclosure discloses a fiber reinforce plastic (FRP) composite material pile prepared by an FRP composite material. The FRP composite material pile includes: an FRP winding pipe, an FRP pultrusion hollow profile, and a connecting device. The FRP pultrusion hollow profile includes an outer ring pipe, an inner ring pipe, and a plurality of reinforcing bars. The FRP pultrusion hollow profile is pultruded at one time by pultrusion equipment, and fiber materials thereof are arranged in the longitudinal direction of the pipe. The FRP winding pipe is provided with circumferential fiber materials by taking the FRP pultrusion hollow profile as a membrane, and forms a composite pipe section with the FRP pultrusion hollow profile. The inner ring shape of the cross section of the FRP winding pipe is matched with the FRP pultrusion hollow profile. The FRP connecting device includes connecting plates, connecting bars, and connecting pins.