TOOLING AND METHOD FOR FLEXIBLE THROUGH CONNECTION BETWEEN DOUBLE LINERS OF WATER HEATER

    公开(公告)号:US20230358442A1

    公开(公告)日:2023-11-09

    申请号:US18354871

    申请日:2023-07-19

    IPC分类号: F24H9/14 F24H9/00 F24H1/18

    CPC分类号: F24H9/14 F24H9/0005 F24H1/181

    摘要: A tooling and method for flexible through connection of a double-liner water heater. The tooling includes a transition shaft, a tooling connecting plate and a fastening screw. The method includes: allowing a shaft head of the transition shaft to be in fit with an inner surface of an outer flange of a lower liner for welding; allowing an end hole to be in fit with an outer surface of an inner flange of an upper liner for welding; after welding seams are cooled, removing the tooling, and enameling the upper and liners; forming through-flexible connection between the inner and outer flanges; and firmly fitting the upper and lower liners together with two steel strips to ensure that a gap between the upper and lower liners is not greater than 7 mm.

    COMPOSITE MATERIAL OPTICAL FIBER ARRAY FOR AUTOMATICALLY IDENTIFYING STRUCTURAL DAMAGE ONLINE

    公开(公告)号:US20210164811A1

    公开(公告)日:2021-06-03

    申请号:US17019950

    申请日:2020-09-14

    IPC分类号: G01D5/353 G02B26/08 G02B6/35

    摘要: Two photoelectric circuit sets each have a light source, two light switches, optical fibers, photoelectric sensor and computer. The light source emits visible light to the first switch, which is continuously deflected and reflected by a torsional micro-mirror. The light respectively irradiates each of the optical fibers in a composite material optical fiber prepreg layer. If the material is normal, the optical fiber is not damaged, the visible light passes through the optical fiber and irradiates the second switch, and is continuously deflected and reflected by a second torsional micro-mirror, the light irradiates the photoelectric sensor. The sensor outputs an electric signal to the computer. If the material is damaged, the optical fiber here is damaged, another corresponding optical fiber path at an intersection point is also damaged without electric signal output. The computer gives breaking position coordinates at the intersection point of two paths of optical fiber arrays.

    METHOD FOR MODIFYING INTERFACE OF CARBON FIBER REINFORCED THERMOPLASTIC RESIN MATRIX COMPOSITE MATERIAL

    公开(公告)号:US20240246261A1

    公开(公告)日:2024-07-25

    申请号:US18328578

    申请日:2023-06-02

    IPC分类号: B29B15/12 B29C70/44

    摘要: A method with which mechanical properties of the interface of the fiber reinforced thermoplastic resin matrix composite material can be improved by conducting grafting on surfaces of materials. A carbon fiber (CF) and a polymethyl methacrylate resin (PMMA) are subjected to interface modification treatment to introduce active carboxyl groups to the surfaces of the materials. Then, hexamethylene diisocyanate (HDI) is used as a coupling layer for connecting the carboxyl groups on the surfaces of the carbon fiber and on the surfaces of the polymethyl methacrylate resin to form a “molecular bridge”. Accordingly, the interface binding force between the resin and the fiber is improved by chemical grafting. A modified carbon fiber reinforced polymethyl methacrylate composite material sample (CF/PMMA) is prepared by a thin film lamination method, and the composite material sample prepared is subjected to a microscopic verification testing of the validity of the method provided in the present disclosure.

    DEVICE AND METHOD FOR INSTALLING AND ADJUSTING SLIDING BLOCK OF MULTIPOINT CRANK PRESS

    公开(公告)号:US20210046722A1

    公开(公告)日:2021-02-18

    申请号:US16746025

    申请日:2020-01-17

    IPC分类号: B30B15/00

    摘要: The present invention discloses a device and method for installing and adjusting a sliding block of a multipoint crank press. The device comprises a crank, a connecting rod with an end provided with a U-shaped notch, a sliding block and an eccentric pin shaft micro-adjustment mechanism. The eccentric pin shaft micro-adjustment mechanism is installed at the joint between the connecting rod and the sliding block. The crank, the connecting rod and the sliding block of the multipoint press are normally machined and installed through a classical process, so that the sliding block of the multipoint press runs to a bottom dead center. A gap among mechanisms is eliminated through the loading by a hydraulic loader. The position of one set of crank, connecting rod and sliding block mechanism is taken as a reference, and then the eccentric positions and directions of the eccentric pin shafts at other adjustment positions are finely adjusted, thus realizing high-precision assembly and operation of the multipoint press.

    MOLDING PROCESS OF CO-CURED SHORT-FIBER RESIN-BASED DAMPING COMPOSITE MATERIAL AND MOLDING PART

    公开(公告)号:US20210039285A1

    公开(公告)日:2021-02-11

    申请号:US16985591

    申请日:2020-08-05

    摘要: A molding process of a co-cured short-fiber resin-based damping composite material and a molding part. Different from a traditional centrifugal processing process of a thin-walled tube of a resin-based composite material, the process uses raw materials including three kinds of materials with different densities and including two kinds of short-fiber epoxy resin with different densities and a damping material. During centrifugal molding, the three kinds of materials are made into fluids to be respectively injected at a uniform speed in three times according to the sizes of the densities. Layering is performed by using different centrifugal forces applied to the three kinds of materials. Co-curing is performed according to a resin curing process after the three kinds of materials are stably distributed, and a tubular thin-walled part of the embedded co-cured short-fiber resin-based damping composite material with a uniform wall thickness is obtained.

    SIMPLY-SUPPORTED FIXTURE USED FOR CIRCULAR PLATE IN DYNAMICS OR STATICS EXPERIMENT

    公开(公告)号:US20210041319A1

    公开(公告)日:2021-02-11

    申请号:US16988307

    申请日:2020-08-07

    IPC分类号: G01M1/02

    摘要: A simply-supported fixture for a circular plate, including: an opening end cover, circular sleeve, base, and semicircular-ring convex platform. The base has a positioning step for guidance, the circular sleeve is concentrically installed on the step of the base, and the opening end cover is concentrically installed on the circular sleeve and connects to the base through a reaming hole bolt. A circular plate disposed between the opening end cover and base, and opposite sides of the opening end cover and base are provided with concave platforms. Two semicircular-ring convex platforms of the same diameter are concentrically installed on the concave platforms, the reaming hole bolt is tightened with force, and the circular plate is supported and fixed on the fixture. The circular plate and the semicircular-ring convex platform on the opening end cover and base, are in line contact wherein lines are parallel and concentric having the same radius.

    EMBEDDED CO-CURED COMPOSITE MATERIAL WITH LARGE-DAMPING AND ELECTROMAGNETIC WAVE ABSORBING PROPERTIES AND PREPARATION METHOD AND APPLICATION THEREOF

    公开(公告)号:US20200376798A1

    公开(公告)日:2020-12-03

    申请号:US16734308

    申请日:2020-01-04

    摘要: Disclosed are an embedded co-cured composite material with large-damping and electromagnetic wave absorbing properties and a preparation method and an application thereof, belonging to damping composite materials. The embedded co-cured composite material is formed by interlacing a plurality of electromagnetic wave absorbing prepreg layers and a plurality of electromagnetic wave absorbing damping layers. Each of the electromagnetic wave absorbing prepregs layers includes a fiber cloth, a micro-nano electromagnetic wave absorbing material and a resin. Contents of the micro-nano electromagnetic wave absorbing material in the electromagnetic wave absorbing prepreg layers and the electromagnetic wave absorbing damping layers have a gradient increase or decrease according to a sequence of the electromagnetic wave absorbing prepreg layers. Each of the electromagnetic wave absorbing damping layers includes a viscoelastic damping material and the micro-nano electromagnetic wave absorbing material.